output: add progress for commit

Fixes #9656

.dvc/.gitignore

@@ -1,12 +1,3 @@
-/state
-/lock
 /config.local
-/updater
-/updater.lock
-/state-journal
-/state-wal
-/cache
-/pkg
-/repos
 /tmp
-/experiments
+/cache

.dvc/config

@@ -1,4 +0,0 @@
-['remote "dvc"']
-url = https://remote.dvc.org/dvc
-[core]
-remote = dvc

.flake8

@@ -1,12 +1,20 @@
 [flake8]
-ignore=
-    E203, # Whitespace before ':'
-    E266, # Too many leading '#' for block comment
-    W503, # Line break occurred before a binary operator
-    P1,  # unindexed parameters in the str.format, see:
+max_line_length = 88
+extend-ignore=
+    # Whitespace before ':'
+    E203
+    # Line break occurred before a binary operator
+    W503
+    # unindexed parameters in the str.format, see:
     # https://pypi.org/project/flake8-string-format/
-max_line_length = 79
-max-complexity = 15
-select = B,C,E,F,W,T4,B902,T,P
+    P1
+max-complexity = 10
 show_source = true
 count = true
+min_python_version = 3.8.0
+per-file-ignores =
+    dvc/testing/benchmarks/conftest.py:F401
+    dvc/testing/conftest.py:F401
+    dvc/testing/plugin.py:F401
+    tests/conftest.py:F401
+    tests/func/experiments/executor/test_ssh.py:F401

.git-blame-ignore-revs

@@ -0,0 +1,10 @@
+# The following commits will be ignored by the GitHub blame view.
+# You can configure `git blame` to use this file as the default ignore file:
+#     git config blame.ignoreRevsFile .git-blame-ignore-revs
+# or, you can also manually ignore commits from this file by doing:
+#     git blame --ignore-revs-file .git-blame-ignore-revs <filepath>
+# see the `blame.markIgnoredLines` and `blame.markUnblamableLines` options as well.
+# Refer to: https://git-scm.com/docs/git-blame#Documentation/git-blame.txt---ignore-revs-fileltfilegt
+
+# update black to 2023 stable style and change line-length to 88
+a86470ccbc693d6f0a4f8066cbd1357e5191c4ff

.github/ISSUE_TEMPLATE/epic_story.md

@@ -0,0 +1,60 @@
+---
+name: Epic/Story Issue Template
+about: Template for "top" level issues - Epics (>2 weeks) / Stories (<2 weeks)
+title: 'Epic: New Feature'
+labels: epic
+assignees:
+
+---
+
+## Summary / Background
+What do you want to achieve, why? business context
+...
+
+## Scope
+
+What will be impacted and what won't be?
+What needs implementation and what is invariant?
+e.g.
+- user should be able to run workflow X from UI
+- enable workflow Y, Z from CLI
+
+## Assumptions
+Product / UX assumptions as well as technical assumptions / limitations
+e.g.
+* Support only Python Runtime
+* Focus on DVC experiments only
+* Deployment environments don't change often and can be picked up from shared configuration
+
+## Open Questions
+e.g.
+- How should access control work for shared artifacts (workflow X)
+- Python runtime assumption - is it really valid? in light of <...>
+
+## Blockers / Dependencies
+List issues or other conditions / blockers
+
+## General Approach
+Invocation example:
+```shell
+$ mapper-run task.tar.gz --ray-cluster <ip>:<port>
+```
+
+## Steps
+
+### Must have (p1)
+- [ ] subissue2
+- [ ] step 2
+ - info
+ - info
+
+### Optional / followup (p2)
+- [ ] ⌛ step 3 wip
+- [ ] step 4
+
+## Timelines
+
+Put your estimations here. Update once certainty changes
+- end of week (Feb 3) for prototype with workflows X, Y
+- Feb 15 - MVP in production
+- Low priority followups can be done later

.github/mergify.yml

@@ -0,0 +1,10 @@
+pull_request_rules:
+  - name: backport patches to 2.x
+    conditions:
+      - base=main
+      - label=backport
+    actions:
+      backport:
+        branches:
+          - "2.x"
+        title: ({{ destination_branch }}) {{ title }}

.github/workflows/build.yaml

@@ -0,0 +1,47 @@
+name: Build package
+on:
+  push:
+    branches:
+    - main
+  release:
+    types: [released, prereleased]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  id-token: write
+
+jobs:
+  pip:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+      with:
+        fetch-depth: 0
+
+    - uses: actions/setup-python@v4
+      with:
+        python-version: 3.8
+
+    - run: python -m pip install --upgrade pip setuptools_scm build twine
+    - name: Force version for Test PyPI upload
+      if: ${{ !startsWith(github.ref, 'refs/tags') }}
+      run: echo version=$(python -m setuptools_scm | awk -F+ '{print $1}' | tail -1) >> $GITHUB_ENV
+
+    - run: |
+        echo 'PKG = "pip"'>dvc/_build.py
+        python -m build
+      env:
+        SETUPTOOLS_SCM_PRETEND_VERSION: ${{ env.version }}
+    - run: twine check --strict dist/*
+
+    - name: Publish to PyPI
+      if: github.event_name == 'release'
+      uses: pypa/gh-action-pypi-publish@release/v1
+
+    - name: Publish to Test PyPI
+      if: ${{ github.event_name == 'release' || (github.event_name == 'push' && github.ref == 'refs/heads/main') }}
+      uses: pypa/gh-action-pypi-publish@release/v1
+      with:
+        repository-url: https://test.pypi.org/legacy/
+        skip-existing: true

.github/workflows/codeql.yml

@@ -2,7 +2,7 @@ name: "CodeQL"
 
 on:
   push:
-    branches: ["main"]
+    branches: ["main", "2.x"]
   pull_request:
     branches: ["main"]
   schedule:

.github/workflows/packages.yaml

@@ -1,112 +0,0 @@
-name: Build packages
-on:
-  push:
-    branches:
-    - main
-  release:
-    types: [released, prereleased]
-  workflow_dispatch:
-
-permissions:  # added using https://github.com/step-security/secure-workflows
-  contents: read
-
-jobs:
-  binary:
-    permissions:
-      contents: write  # for actions/upload-release-asset to upload release asset
-    strategy:
-      matrix:
-        include:
-         - {pkg: "deb",  os: "ubuntu-18.04", asset: "dvc_${{ github.event.release.tag_name }}_amd64.deb"}
-         - {pkg: "rpm", os: "ubuntu-18.04", asset: "dvc-${{ github.event.release.tag_name }}-1.x86_64.rpm"}
-         - {pkg: "osxpkg", os: "macos-10.15", asset: "dvc-${{ github.event.release.tag_name }}.pkg"}
-         - {pkg: "exe",  os: "windows-2019", asset: "dvc-${{ github.event.release.tag_name }}.exe"}
-
-    name: ${{ matrix.pkg }}
-    runs-on: ${{ matrix.os }}
-    steps:
-    - uses: actions/checkout@v3
-      with:
-          fetch-depth: 0
-
-    - name: Set up Python 3.10
-      uses: actions/setup-python@v4
-      with:
-        python-version: "3.10"
-        cache: pip
-        cache-dependency-path: |
-          pyproject.toml
-          scripts/build-requirements.txt
-
-    - name: Set up Ruby 2.6
-      uses: ruby/setup-ruby@v1
-      if: matrix.pkg != 'exe'
-      with:
-        ruby-version: '2.6'
-
-    - name: Install fpm
-      if: matrix.pkg != 'exe'
-      run: gem install --no-document fpm
-
-    - name: Install deps
-      run: |
-        pip install --upgrade pip wheel setuptools
-        pip install .[all]
-        pip install -r scripts/build-requirements.txt
-
-    - name: Pull images
-      run: dvc pull
-
-    - name: Build ${{ matrix.pkg }}
-      run: python scripts/build.py ${{ matrix.pkg }}
-
-    - name: Publish ${{ matrix.pkg }}
-      if: github.event_name == 'release'
-      uses: actions/[email protected]
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      with:
-        upload_url: ${{ github.event.release.upload_url }}
-        asset_path: scripts/${{ matrix.pkg == 'exe' && 'innosetup' || 'fpm' }}/${{ matrix.asset }}
-        asset_name: ${{ matrix.asset }}
-        asset_content_type: binary/octet-stream
-
-  pip:
-    runs-on: ubuntu-20.04
-    steps:
-    - uses: actions/checkout@v3
-      with:
-        fetch-depth: 0
-
-    - name: Set up Python 3.8
-      uses: actions/setup-python@v4
-      with:
-        python-version: 3.8
-
-    - name: Install
-      run: pip install --upgrade pip wheel
-
-    - name: Force version for Test PyPI uploads
-      if: ${{ !startsWith(github.ref, 'refs/tags') }}
-      run: |
-        pip install setuptools_scm
-        echo version=$(python -m setuptools_scm | awk -F+ '{print $1}' | tail -1) >> $GITHUB_ENV
-
-    - name: Build packages
-      run: ./scripts/build_package.sh
-      env:
-        SETUPTOOLS_SCM_PRETEND_VERSION: ${{ env.version }}
-
-    - name: Publish packages to PyPI
-      if: github.event_name == 'release'
-      uses: pypa/gh-action-pypi-publish@release/v1
-      with:
-        password: ${{ secrets.PYPI_TOKEN }}
-
-    - name: Publish to Test PyPI
-      if: ${{ github.event_name == 'release' || (github.event_name == 'push' && github.ref == 'refs/heads/main') }}
-      uses: pypa/gh-action-pypi-publish@release/v1
-      with:
-        password: ${{ secrets.TEST_PYPI_TOKEN }}
-        repository_url: https://test.pypi.org/legacy/
-        skip_existing: true

.github/workflows/plugin_tests.yaml

@@ -0,0 +1,54 @@
+name: Remote Plugin Tests
+
+on:
+  pull_request:
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read
+
+jobs:
+  tests:
+    timeout-minutes: 45
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-20.04]
+        pyv: ["3.10"]
+        plugin: ["dvc-s3"]
+
+    steps:
+    - uses: actions/checkout@v3
+      with:
+        path: dvc
+
+    - uses: actions/checkout@v3
+      with:
+        repository: iterative/${{ matrix.plugin }}
+        ref: main
+        path: ${{ matrix.plugin }}
+
+    - name: Set up Python
+      uses: actions/setup-python@v4
+      with:
+        python-version: ${{ matrix.pyv }}
+        cache: pip
+        cache-dependency-path: |
+          dvc/pyproject.toml
+          ${{ matrix.plugin }}/setup.cfg
+
+    - name: Install plugin + DVC@PR
+      run: |
+        pip install --upgrade pip wheel
+        pip install "./dvc[testing]"
+        pip install -e "./${{ matrix.plugin }}[tests]"
+
+    - name: Run plugin tests
+      timeout-minutes: 15
+      working-directory: ${{ matrix.plugin }}
+      run: pytest -v -n=auto

.github/workflows/tests.yaml

@@ -2,59 +2,28 @@ name: Tests
 
 on:
   push:
-    branches: [main]
+    branches: [main, 2.x]
   pull_request:
   schedule:
     - cron: '5 1 * * *'  # every day at 01:05
   workflow_dispatch:
 
-env:
-  DVC_TEST: "true"
-  HOMEBREW_NO_AUTO_UPDATE: 1
-  SHELL: /bin/bash
-
 concurrency:
   group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
   cancel-in-progress: true
 
-permissions:  # added using https://github.com/step-security/secure-workflows
+permissions:
   contents: read
 
 jobs:
-  lint:
-    timeout-minutes: 10
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v3
-      with:
-        fetch-depth: 0
-    - name: Set up Python 3.8
-      uses: actions/setup-python@v4
-      with:
-        python-version: 3.8
-        cache: pip
-        cache-dependency-path: pyproject.toml
-    - name: Install requirements
-      run: |
-        pip install --upgrade pip wheel
-        pip install ".[dev]"
-    - uses: pre-commit/[email protected]
   tests:
-    timeout-minutes: 45
+    timeout-minutes: 50
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-20.04, windows-latest]
+        os: [ubuntu-20.04, windows-latest, macos-latest]
         pyv: ["3.8", "3.9", "3.10", "3.11"]
-        pytest-filter:
-        - "import or plot or live or experiment"
-        - "not (import or plot or live or experiment)"
-        include:
-        - {os: macos-latest, pyv: "3.8"}
-        - {os: macos-latest, pyv: "3.9"}
-        - {os: macos-latest, pyv: "3.10"}
-        - {os: macos-latest, pyv: "3.11"}
 
     steps:
     - uses: actions/checkout@v3
@@ -70,9 +39,14 @@ jobs:
       run: |
         pip install --upgrade pip wheel
         pip install -e ".[dev]"
+    - uses: pre-commit/[email protected]
     - name: run tests
-      timeout-minutes: 20
-      run: pytest -nauto --durations 100 --cov --cov-report=xml --cov-report=term -k "${{ matrix.pytest-filter }}"
+      timeout-minutes: 40
+      env:
+        PYTHONUTF8: 1
+      run: >
+        pytest -n=logical --timeout=300 --durations=100
+        --cov --cov-report=xml --cov-report=term
     - name: upload coverage report
       uses: codecov/codecov-action@v3
       with:
@@ -80,7 +54,7 @@ jobs:
         fail_ci_if_error: false
   check:
     if: always()
-    needs: [lint, tests]
+    needs: [tests]
     runs-on: ubuntu-latest
     steps:
       - uses: re-actors/alls-green@release/v1
@@ -88,7 +62,7 @@ jobs:
           jobs: ${{ toJSON(needs) }}
   notify:
     if: github.ref == 'refs/heads/main' && failure()
-    needs: [lint, tests]
+    needs: [tests]
     runs-on: ubuntu-latest
     steps:
     - name: Slack Notification

.pre-commit-config.yaml

@@ -6,7 +6,7 @@ ci:
 
 repos:
   - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v4.3.0
+    rev: v4.4.0
     hooks:
       - id: check-added-large-files
       - id: check-case-conflict
@@ -23,40 +23,38 @@ repos:
       - id: mixed-line-ending
       - id: sort-simple-yaml
       - id: trailing-whitespace
-  - repo: https://github.com/lovesegfault/beautysh
-    rev: v6.2.1
-    hooks:
-      - id: beautysh
-        args: ["-i", "2"]
-  - repo: https://github.com/asottile/pyupgrade
-    rev: v3.2.0
-    hooks:
-      - id: pyupgrade
-        args:
-          - --py38-plus
   - repo: https://github.com/psf/black
-    rev: 22.10.0
+    rev: 23.7.0
     hooks:
       - id: black
   - repo: https://github.com/PyCQA/isort
-    rev: 5.10.1
+    rev: 5.12.0
     hooks:
       - id: isort
+  - repo: https://github.com/astral-sh/ruff-pre-commit
+    rev: 'v0.0.282'
+    hooks:
+      - id: ruff
+        args: [--fix, --exit-non-zero-on-fix]
   - repo: https://github.com/codespell-project/codespell
-    rev: v2.2.2
+    rev: v2.2.5
     hooks:
       - id: codespell
         additional_dependencies: ["tomli"]
   - repo: https://github.com/PyCQA/flake8
-    rev: 5.0.4
+    rev: 6.1.0
     hooks:
       - id: flake8
         additional_dependencies:
-          - flake8-broken-line
-          - flake8-bugbear
-          - flake8-comprehensions
-          - flake8-debugger
           - flake8-string-format
+          - flake8-typing-imports
+  - repo: https://github.com/PyCQA/bandit
+    rev: '1.7.5'
+    hooks:
+    - id: bandit
+      args: ["-c", "pyproject.toml", "--quiet", "--format=custom"]
+      files: ^dvc/
+      additional_dependencies: [".[toml]"]
   - repo: local
     hooks:
     - id: mypy
@@ -65,11 +63,14 @@ repos:
       files: ^dvc/
       language: system
       types: [python]
+      require_serial: true
     - id: pylint
       name: pylint
       entry: pylint
+      files: ^dvc/
       language: system
       types: [python]
+      require_serial: true
   - hooks:
       - args:
           - git-hook

README.rst

@@ -280,8 +280,8 @@ Barrak, A., Eghan, E.E. and Adams, B. `On the Co-evolution of ML Pipelines and S
    :target: https://pypi.org/project/dvc
    :alt: PyPI Downloads
 
-.. |Packages| image:: https://img.shields.io/github/v/release/iterative/dvc?label=deb|pkg|rpm|exe&logo=GitHub
-   :target: https://github.com/iterative/dvc/releases/latest
+.. |Packages| image:: https://img.shields.io/badge/deb|pkg|rpm|exe-blue
+   :target: https://dvc.org/doc/install
    :alt: deb|pkg|rpm|exe
 
 .. |DOI| image:: https://img.shields.io/badge/DOI-10.5281/zenodo.3677553-blue.svg

dvc/__init__.py

@@ -4,6 +4,7 @@ DVC
 Make your data science projects reproducible and shareable.
 """
 import dvc.logger
+from dvc.build import PKG  # noqa: F401
 from dvc.version import __version__, version_tuple  # noqa: F401
 
 dvc.logger.setup()

dvc/__pyinstaller/__init__.py

@@ -0,0 +1,5 @@
+import os
+
+
+def get_hook_dirs():
+    return [os.path.dirname(__file__)]

dvc/__pyinstaller/hook-asyncssh.py

@@ -1 +1,2 @@
+# ruff: noqa: N999
 hiddenimports = ["win32timezone"]

dvc/__pyinstaller/hook-celery.py

@@ -1,3 +1,4 @@
+# ruff: noqa: N999
 # pylint: disable=import-error
 from PyInstaller.utils.hooks import collect_submodules, is_module_or_submodule
 

dvc/__pyinstaller/hook-dvc.py

@@ -1,6 +1,5 @@
-from PyInstaller.utils.hooks import (  # pylint:disable=import-error
-    copy_metadata,
-)
+# ruff: noqa: N999
+from PyInstaller.utils.hooks import copy_metadata  # pylint:disable=import-error
 
 # needed for `dvc doctor` to show dep versions
 datas = copy_metadata("adlfs", recursive=True)

dvc/__pyinstaller/hook-dvc.utils.flatten.py

@@ -0,0 +1,4 @@
+# ruff: noqa: N999
+from PyInstaller.utils.hooks import copy_metadata  # pylint:disable=import-error
+
+datas = copy_metadata("flatten-dict")

dvc/__pyinstaller/hook-dvc_task.py

@@ -1,3 +1,4 @@
+# ruff: noqa: N999
 # pylint: disable=import-error
 from PyInstaller.utils.hooks import collect_submodules
 

dvc/__pyinstaller/hook-fsspec.py

@@ -1 +1,2 @@
+# ruff: noqa: N999
 hiddenimports = ["fsspec.implementations.memory"]

dvc/__pyinstaller/hook-pydrive2.py

@@ -0,0 +1,4 @@
+# ruff: noqa: N999
+from PyInstaller.utils.hooks import copy_metadata  # pylint:disable=import-error
+
+datas = copy_metadata("pydrive2")

dvc/_debug.py

@@ -8,15 +8,19 @@ if TYPE_CHECKING:
 
 
 @contextmanager
-def viztracer_profile(path: Union[Callable[[], str], str], depth: int = -1):
+def viztracer_profile(
+    path: Union[Callable[[], str], str],
+    depth: int = -1,
+    log_async: bool = False,
+):
     try:
         import viztracer  # pylint: disable=import-error
     except ImportError:
-        print("Failed to run profiler, viztracer is not installed")
+        print("Failed to run profiler, viztracer is not installed")  # noqa: T201
         yield
         return
 
-    tracer = viztracer.VizTracer(max_stack_depth=depth)
+    tracer = viztracer.VizTracer(max_stack_depth=depth, log_async=log_async)
 
     tracer.start()
     yield
@@ -27,14 +31,14 @@ def viztracer_profile(path: Union[Callable[[], str], str], depth: int = -1):
 
 @contextmanager
 def yappi_profile(
-    path: Union[Callable[[], str], str] = None,
+    path: Optional[Union[Callable[[], str], str]] = None,
     wall_clock: Optional[bool] = True,
     separate_threads: Optional[bool] = False,
 ):
     try:
         import yappi  # pylint: disable=import-error
     except ImportError:
-        print("Failed to run profiler, yappi is not installed")
+        print("Failed to run profiler, yappi is not installed")  # noqa: T201
         yield
         return
 
@@ -60,7 +64,7 @@ def yappi_profile(
             st.save(out, type="callgrind")
         else:
             if ctx_id is not None:
-                print(f"\nThread {ctx_id}")
+                print(f"\nThread {ctx_id}")  # noqa: T201
             st.print_all()  # pylint:disable=no-member
             if ctx_id is None:
                 threads.print_all()  # pylint:disable=no-member
@@ -74,7 +78,7 @@ def instrument(html_output=False):
     try:
         from pyinstrument import Profiler  # pylint: disable=import-error
     except ImportError:
-        print("Failed to run profiler, pyinstrument is not installed")
+        print("Failed to run profiler, pyinstrument is not installed")  # noqa: T201
         yield
         return
 
@@ -87,11 +91,11 @@ def instrument(html_output=False):
     if html_output:
         profiler.open_in_browser()
         return
-    print(profiler.output_text(unicode=True, color=True))
+    print(profiler.output_text(unicode=True, color=True))  # noqa: T201
 
 
 @contextmanager
-def profile(dump_path: str = None):
+def profile(dump_path: Optional[str] = None):
     """Run a cprofile"""
     import cProfile
 
@@ -115,28 +119,31 @@ def debug():
         try:
             import ipdb as pdb  # noqa: T100, pylint: disable=import-error
         except ImportError:
-            import pdb  # noqa: T100
+            import pdb  # type: ignore[no-redef]  # noqa: T100
         pdb.post_mortem()
 
         raise  # prevent from jumping ahead
 
 
 def _sigshow(_, frame: Optional["FrameType"]) -> None:
+    import sys
     from shutil import get_terminal_size
     from traceback import format_stack
 
-    from dvc.ui import ui
-
     lines = "\u2015" * get_terminal_size().columns
-    ui.error_write(lines, "\n", *format_stack(frame), lines, sep="")
+    stack = format_stack(frame)
+    print(lines, "\n", *stack, lines, sep="", file=sys.stderr)  # noqa: T201
 
 
 @contextmanager
 def show_stack():
     r"""Show stack trace on SIGQUIT (Ctrl-\) or SIGINFO (Ctrl-T on macOS)."""
     import signal
+    import sys
+
+    if sys.platform != "win32":
+        signal.signal(signal.SIGQUIT, _sigshow)
 
-    signal.signal(signal.SIGQUIT, _sigshow)
     try:
         signal.signal(signal.SIGINFO, _sigshow)  # only available on macOS
     except AttributeError:
@@ -154,7 +161,7 @@ def _get_path_func(tool: str, ext: str):
 
 
 @contextmanager
-def debugtools(args: "Namespace" = None, **kwargs):
+def debugtools(args: Optional["Namespace"] = None, **kwargs):
     kw = vars(args) if args else {}
     kw.update(kwargs)
 
@@ -175,10 +182,15 @@ def debugtools(args: "Namespace" = None, **kwargs):
                     separate_threads=kw.get("yappi_separate_threads"),
                 )
             )
-        if kw.get("viztracer") or kw.get("viztracer_depth"):
+        if (
+            kw.get("viztracer")
+            or kw.get("viztracer_depth")
+            or kw.get("viztracer_async")
+        ):
             path_func = _get_path_func("viztracer", "json")
             depth = kw.get("viztracer_depth") or -1
-            prof = viztracer_profile(path=path_func, depth=depth)
+            log_async = kw.get("viztracer_async") or False
+            prof = viztracer_profile(path=path_func, depth=depth, log_async=log_async)
             stack.enter_context(prof)
         yield
 
@@ -186,36 +198,84 @@ def debugtools(args: "Namespace" = None, **kwargs):
 def add_debugging_flags(parser):
     from argparse import SUPPRESS
 
+    # For detailed info see:
+    # https://github.com/iterative/dvc/wiki/Debugging,-Profiling-and-Benchmarking-DVC
+    args, _ = parser.parse_known_args()
+    verbose = args.verbose
+
+    def debug_help(msg):
+        if verbose:
+            return msg
+        return SUPPRESS
+
+    parser = parser.add_argument_group("debug options")
+
     parser.add_argument(
-        "--cprofile", action="store_true", default=False, help=SUPPRESS
+        "--cprofile",
+        action="store_true",
+        default=False,
+        help=debug_help("Generate cprofile data for tools like snakeviz / tuna"),
     )
     parser.add_argument(
-        "--yappi", action="store_true", default=False, help=SUPPRESS
+        "--cprofile-dump", help=debug_help("Location to dump cprofile file")
+    )
+    parser.add_argument(
+        "--yappi",
+        action="store_true",
+        default=False,
+        help=debug_help(
+            "Generate a callgrind file for use with tools like "
+            "kcachegrind / qcachegrind"
+        ),
     )
     parser.add_argument(
         "--yappi-separate-threads",
         action="store_true",
         default=False,
-        help=SUPPRESS,
+        help=debug_help("Generate one callgrind file per thread"),
     )
     parser.add_argument(
-        "--viztracer", action="store_true", default=False, help=SUPPRESS
-    )
-    parser.add_argument("--viztracer-depth", type=int, help=SUPPRESS)
-    parser.add_argument("--cprofile-dump", help=SUPPRESS)
-    parser.add_argument(
-        "--pdb", action="store_true", default=False, help=SUPPRESS
+        "--viztracer",
+        action="store_true",
+        default=False,
+        help=debug_help("Generate a viztracer file for use with vizviewer"),
     )
     parser.add_argument(
-        "--instrument", action="store_true", default=False, help=SUPPRESS
+        "--viztracer-depth",
+        type=int,
+        help=debug_help("Set viztracer maximum stack depth"),
     )
     parser.add_argument(
-        "--instrument-open", action="store_true", default=False, help=SUPPRESS
+        "--viztracer-async",
+        action="store_true",
+        default=False,
+        help=debug_help("Treat async tasks as threads"),
+    )
+    parser.add_argument(
+        "--pdb",
+        action="store_true",
+        default=False,
+        help=debug_help("Drop into the pdb/ipdb debugger on any exception"),
+    )
+    parser.add_argument(
+        "--instrument",
+        action="store_true",
+        default=False,
+        help=debug_help("Use pyinstrument CLI profiler"),
+    )
+    parser.add_argument(
+        "--instrument-open",
+        action="store_true",
+        default=False,
+        help=debug_help("Use pyinstrument web profiler"),
     )
     parser.add_argument(
         "--show-stack",
         "--ss",
         action="store_true",
         default=False,
-        help=SUPPRESS,
+        help=debug_help(
+            r"Use Ctrl+T on macOS or Ctrl+\ on Linux to print the stack "
+            "frame currently executing. Unavailable on Windows."
+        ),
     )

dvc/analytics.py

@@ -47,7 +47,7 @@ def is_enabled():
     enabled = not os.getenv(DVC_NO_ANALYTICS)
     if enabled:
         enabled = to_bool(
-            Config(validate=False).get("core", {}).get("analytics", "true")
+            Config.from_cwd(validate=False).get("core", {}).get("analytics", "true")
         )
 
     logger.debug("Analytics is %sabled.", "en" if enabled else "dis")
@@ -82,10 +82,9 @@ def send(path):
 
 
 def _scm_in_use():
-    from scmrepo.noscm import NoSCM
-
     from dvc.exceptions import NotDvcRepoError
     from dvc.repo import Repo
+    from dvc.scm import NoSCM
 
     from .scm import SCM, SCMError
 
@@ -102,17 +101,24 @@ def _runtime_info():
     """
     Gather information from the environment where DVC runs to fill a report.
     """
-    from iterative_telemetry import find_or_create_user_id
+    from iterative_telemetry import _generate_ci_id, find_or_create_user_id
 
     from dvc import __version__
     from dvc.utils import is_binary
 
+    ci_id = _generate_ci_id()
+    if ci_id:
+        group_id, user_id = ci_id
+    else:
+        group_id, user_id = None, find_or_create_user_id()
+
     return {
         "dvc_version": __version__,
         "is_binary": is_binary(),
         "scm_class": _scm_in_use(),
         "system_info": _system_info(),
-        "user_id": find_or_create_user_id(),
+        "user_id": user_id,
+        "group_id": group_id,
     }
 
 
@@ -125,7 +131,7 @@ def _system_info():
     system = platform.system()
 
     if system == "Windows":
-        version = sys.getwindowsversion()
+        version = sys.getwindowsversion()  # type: ignore[attr-defined]
 
         return {
             "os": "windows",

dvc/annotations.py

@@ -2,6 +2,7 @@ from dataclasses import asdict, dataclass, field, fields
 from typing import Any, ClassVar, Dict, List, Optional
 
 from funcy import compact
+from voluptuous import Required
 
 
 @dataclass
@@ -12,15 +13,27 @@ class Annotation:
     PARAM_META: ClassVar[str] = "meta"
 
     desc: Optional[str] = None
-    type: Optional[str] = None
+    type: Optional[str] = None  # noqa: A003
     labels: List[str] = field(default_factory=list)
     meta: Dict[str, Any] = field(default_factory=dict)
 
-    def update(self, **kwargs) -> "Annotation":
-        for attr, value in kwargs.items():
-            if value and hasattr(self, attr):
-                setattr(self, attr, value)
-        return self
+    def to_dict(self) -> Dict[str, str]:
+        return compact(asdict(self))
+
+
+@dataclass
+class Artifact:
+    PARAM_PATH: ClassVar[str] = "path"
+    PARAM_DESC: ClassVar[str] = "desc"
+    PARAM_TYPE: ClassVar[str] = "type"
+    PARAM_LABELS: ClassVar[str] = "labels"
+    PARAM_META: ClassVar[str] = "meta"
+
+    path: str
+    desc: Optional[str] = None
+    type: Optional[str] = None  # noqa: A003
+    labels: List[str] = field(default_factory=list)
+    meta: Dict[str, Any] = field(default_factory=dict)
 
     def to_dict(self) -> Dict[str, str]:
         return compact(asdict(self))
@@ -33,3 +46,7 @@ ANNOTATION_SCHEMA = {
     Annotation.PARAM_LABELS: [str],
     Annotation.PARAM_META: object,
 }
+ARTIFACT_SCHEMA = {
+    Required(Artifact.PARAM_PATH): str,
+    **ANNOTATION_SCHEMA,  # type: ignore[arg-type]
+}

dvc/api/__init__.py

@@ -2,14 +2,20 @@ from dvc.fs.dvc import _DVCFileSystem as DVCFileSystem
 
 from .data import open  # pylint: disable=redefined-builtin
 from .data import get_url, read
-from .experiments import make_checkpoint
-from .params import params_show
+from .experiments import exp_save, exp_show
+from .scm import all_branches, all_commits, all_tags
+from .show import metrics_show, params_show
 
 __all__ = [
+    "all_branches",
+    "all_commits",
+    "all_tags",
+    "exp_save",
+    "exp_show",
     "get_url",
-    "make_checkpoint",
     "open",
     "params_show",
+    "metrics_show",
     "read",
     "DVCFileSystem",
 ]

dvc/api/data.py

@@ -1,12 +1,30 @@
 from contextlib import _GeneratorContextManager as GCM
-from typing import Optional
+from contextlib import contextmanager
+from typing import Any, Dict, Optional
 
 from funcy import reraise
 
-from dvc.exceptions import OutputNotFoundError, PathMissingError
+from dvc.exceptions import FileMissingError, OutputNotFoundError, PathMissingError
 from dvc.repo import Repo
 
 
+@contextmanager
+def _wrap_exceptions(repo, url):
+    from dvc.config import NoRemoteError
+    from dvc.exceptions import NoOutputInExternalRepoError, NoRemoteInExternalRepoError
+
+    try:
+        yield
+    except NoRemoteError as exc:
+        raise NoRemoteInExternalRepoError(url) from exc
+    except OutputNotFoundError as exc:
+        if exc.repo is repo:
+            raise NoOutputInExternalRepoError(exc.output, repo.root_dir, url) from exc
+        raise
+    except FileMissingError as exc:
+        raise PathMissingError(exc.path, url) from exc
+
+
 def get_url(path, repo=None, rev=None, remote=None):
     """
     Returns the URL to the storage location of a data file or directory tracked
@@ -18,41 +36,46 @@ def get_url(path, repo=None, rev=None, remote=None):
     NOTE: This function does not check for the actual existence of the file or
     directory in the remote storage.
     """
-    with Repo.open(repo, rev=rev, subrepos=True, uninitialized=True) as _repo:
-        fs_path = _repo.dvcfs.from_os_path(path)
-        with reraise(FileNotFoundError, PathMissingError(path, repo)):
-            info = _repo.dvcfs.info(fs_path)
+    from dvc.config import NoRemoteError
+    from dvc_data.index import StorageKeyError
 
-        dvc_info = info.get("dvc_info")
-        if not dvc_info:
-            raise OutputNotFoundError(path, repo)
-
-        dvc_repo = info["repo"]
-        md5 = dvc_info["md5"]
-
-        return dvc_repo.cloud.get_url_for(remote, checksum=md5)
+    repo_kwargs: Dict[str, Any] = {}
+    if remote:
+        repo_kwargs["config"] = {"core": {"remote": remote}}
+    with Repo.open(
+        repo, rev=rev, subrepos=True, uninitialized=True, **repo_kwargs
+    ) as _repo:
+        index, entry = _repo.get_data_index_entry(path)
+        with reraise(
+            (StorageKeyError, ValueError),
+            NoRemoteError(f"no remote specified in {_repo}"),
+        ):
+            remote_fs, remote_path = index.storage_map.get_remote(entry)
+            return remote_fs.unstrip_protocol(remote_path)
 
 
 class _OpenContextManager(GCM):
-    def __init__(
-        self, func, args, kwds
-    ):  # pylint: disable=super-init-not-called
+    def __init__(self, func, args, kwds):  # pylint: disable=super-init-not-called
         self.gen = func(*args, **kwds)
-        self.func, self.args, self.kwds = func, args, kwds
-
-    def __getattr__(self, name):
-        raise AttributeError(
-            "dvc.api.open() should be used in a with statement."
+        self.func, self.args, self.kwds = (  # type: ignore[assignment]
+            func,
+            args,
+            kwds,
         )
 
+    def __getattr__(self, name):
+        raise AttributeError("dvc.api.open() should be used in a with statement.")
 
-def open(  # noqa, pylint: disable=redefined-builtin
+
+def open(  # noqa: A001, pylint: disable=redefined-builtin
     path: str,
     repo: Optional[str] = None,
     rev: Optional[str] = None,
     remote: Optional[str] = None,
     mode: str = "r",
     encoding: Optional[str] = None,
+    config: Optional[Dict[str, Any]] = None,
+    remote_config: Optional[Dict[str, Any]] = None,
 ):
     """
     Opens a file tracked in a DVC project.
@@ -94,6 +117,11 @@ def open(  # noqa, pylint: disable=redefined-builtin
             Defaults to None.
             This should only be used in text mode.
             Mirrors the namesake parameter in builtin `open()`_.
+        config(dict, optional): config to be passed to the DVC repository.
+            Defaults to None.
+        remote_config(dict, optional): remote config to be passed to the DVC
+            repository.
+            Defaults to None.
 
     Returns:
         _OpenContextManager: A context manager that generatse a corresponding
@@ -189,25 +217,86 @@ def open(  # noqa, pylint: disable=redefined-builtin
         "rev": rev,
         "mode": mode,
         "encoding": encoding,
+        "config": config,
+        "remote_config": remote_config,
     }
     return _OpenContextManager(_open, args, kwargs)
 
 
-def _open(path, repo=None, rev=None, remote=None, mode="r", encoding=None):
-    with Repo.open(repo, rev=rev, subrepos=True, uninitialized=True) as _repo:
-        with _repo.open_by_relpath(
-            path, remote=remote, mode=mode, encoding=encoding
-        ) as fd:
-            yield fd
+def _open(
+    path,
+    repo=None,
+    rev=None,
+    remote=None,
+    mode="r",
+    encoding=None,
+    config=None,
+    remote_config=None,
+):
+    repo_kwargs: Dict[str, Any] = {
+        "subrepos": True,
+        "uninitialized": True,
+        "remote": remote,
+        "config": config,
+        "remote_config": remote_config,
+    }
+
+    with Repo.open(repo, rev=rev, **repo_kwargs) as _repo:
+        with _wrap_exceptions(_repo, path):
+            import os
+            from typing import TYPE_CHECKING, Union
+
+            from dvc.exceptions import IsADirectoryError as DvcIsADirectoryError
+            from dvc.fs.data import DataFileSystem
+            from dvc.fs.dvc import DVCFileSystem
+
+            if TYPE_CHECKING:
+                from dvc.fs import FileSystem
+
+            fs: Union["FileSystem", DataFileSystem, DVCFileSystem]
+            if os.path.isabs(path):
+                fs = DataFileSystem(index=_repo.index.data["local"])
+                fs_path = path
+            else:
+                fs = DVCFileSystem(repo=_repo, subrepos=True)
+                fs_path = fs.from_os_path(path)
+
+            try:
+                with fs.open(
+                    fs_path,
+                    mode=mode,
+                    encoding=encoding,
+                ) as fobj:
+                    yield fobj
+            except FileNotFoundError as exc:
+                raise FileMissingError(path) from exc
+            except IsADirectoryError as exc:
+                raise DvcIsADirectoryError(f"'{path}' is a directory") from exc
 
 
-def read(path, repo=None, rev=None, remote=None, mode="r", encoding=None):
+def read(
+    path,
+    repo=None,
+    rev=None,
+    remote=None,
+    mode="r",
+    encoding=None,
+    config=None,
+    remote_config=None,
+):
     """
     Returns the contents of a tracked file (by DVC or Git). For Git repos, HEAD
     is used unless a rev argument is supplied. The default remote is tried
     unless a remote argument is supplied.
     """
     with open(
-        path, repo=repo, rev=rev, remote=remote, mode=mode, encoding=encoding
+        path,
+        repo=repo,
+        rev=rev,
+        remote=remote,
+        mode=mode,
+        encoding=encoding,
+        config=config,
+        remote_config=remote_config,
     ) as fd:
         return fd.read()

dvc/api/experiments.py

@@ -1,33 +1,120 @@
-import builtins
-import os
-from time import sleep
+from typing import Dict, List, Optional, Union
+
+from rich.text import Text
 
-from dvc.env import DVC_CHECKPOINT, DVC_ROOT
 from dvc.repo import Repo
-from dvc.stage.monitor import CheckpointTask
+from dvc.repo.experiments.show import tabulate
 
 
-def make_checkpoint():
+def exp_save(
+    name: Optional[str] = None,
+    force: bool = False,
+    include_untracked: Optional[List[str]] = None,
+):
     """
-    Signal DVC to create a checkpoint experiment.
+    Create a new DVC experiment using `exp save`.
 
-    If the current process is being run from DVC, this function will block
-    until DVC has finished creating the checkpoint. Otherwise, this function
-    will return immediately.
+    See https://dvc.org/doc/command-reference/exp/save.
+
+    Args:
+        name (str, optional): specify a name for this experiment.
+            If `None`, a default one will be generated, such as `urban-sign`.
+            Defaults to `None`.
+        force (bool):  overwrite the experiment if an experiment with the same
+            name already exists.
+            Defaults to `False`.
+        include_untracked (List[str], optional): specify untracked file(s) to
+            be included in the saved experiment.
+            Defaults to `None`.
+
+    Returns:
+        str: The `Git revision`_ of the created experiment.
+
+    Raises:
+        ExperimentExistsError: If an experiment with `name` already exists and
+            `force=False`.
+
+    .. _Git revision:
+        https://git-scm.com/docs/revisions
     """
-    if os.getenv(DVC_CHECKPOINT) is None:
-        return
+    with Repo() as repo:
+        return repo.experiments.save(
+            name=name, force=force, include_untracked=include_untracked
+        )
 
-    root_dir = os.getenv(DVC_ROOT, Repo.find_root())
-    signal_file = os.path.join(
-        root_dir, Repo.DVC_DIR, "tmp", CheckpointTask.SIGNAL_FILE
-    )
 
-    with builtins.open(signal_file, "w", encoding="utf-8") as fobj:
-        # NOTE: force flushing/writing empty file to disk, otherwise when
-        # run in certain contexts (pytest) file may not actually be written
-        fobj.write("")
-        fobj.flush()
-        os.fsync(fobj.fileno())
-    while os.path.exists(signal_file):
-        sleep(0.1)
+def _postprocess(exp_rows):
+    for exp_row in exp_rows:
+        for k, v in exp_row.items():
+            if isinstance(v, Text):
+                v_str = str(v)
+                try:
+                    exp_row[k] = float(v_str)
+                except ValueError:
+                    exp_row[k] = v_str
+
+            if not exp_row[k]:
+                exp_row[k] = None
+
+    return exp_rows
+
+
+def exp_show(
+    repo: Optional[str] = None,
+    revs: Optional[Union[str, List[str]]] = None,
+    num: int = 1,
+    param_deps: bool = False,
+    force: bool = False,
+    config: Optional[Dict] = None,
+) -> List[Dict]:
+    """Get DVC experiments tracked in `repo`.
+
+    Without arguments, this function will retrieve all experiments derived from
+    the Git `HEAD`.
+
+    See the options below to customize the experiments retrieved.
+
+    Args:
+        repo (str, optional): location of the DVC repository.
+            Defaults to the current project (found by walking up from the
+            current working directory tree).
+            It can be a URL or a file system path.
+            Both HTTP and SSH protocols are supported for online Git repos
+            (e.g. [user@]server:project.git).
+        revs (Union[str, List[str]], optional): Git revision(s) (e.g. branch,
+            tag, SHA commit) to use as a reference point to start listing
+            experiments.
+            Defaults to `None`, which will use `HEAD` as starting point.
+        num (int, optional): show experiments from the last `num` commits
+            (first parents) starting from the `revs` baseline.
+            Give a negative value to include all first-parent commits (similar
+            to `git log -n`).
+            Defaults to 1.
+        param_deps (bool, optional): include only parameters that are stage
+            dependencies.
+            Defaults to `False`.
+        force (bool, optional): force re-collection of experiments instead of
+            loading from internal experiments cache.
+            DVC caches `exp_show` data for completed experiments to improve
+            performance of subsequent calls.
+            When `force` is specified, DVC will reload all experiment data and
+            ignore any previously cached results.
+            Defaults to `False`.
+        config (dict, optional): config to be passed through to DVC project.
+            Defaults to `None`.
+
+    Returns:
+        List[Dict]: Each item in the list will contain a dictionary with
+            the info for an individual experiment.
+            See Examples below.
+    """
+    with Repo.open(repo, config=config) as _repo:
+        experiments = _repo.experiments.show(
+            revs=revs,
+            num=num,
+            param_deps=param_deps,
+            force=force,
+        )
+        td, _ = tabulate(experiments, fill_value=None)
+
+        return _postprocess(td.as_dict())

dvc/api/scm.py

@@ -0,0 +1,54 @@
+from typing import List, Optional
+
+from dvc.repo import Repo
+
+
+def all_branches(repo: Optional[str] = None) -> List[str]:
+    """Get all Git branches in a DVC repository.
+
+    Args:
+        repo (str, optional): location of the DVC repository.
+            Defaults to the current project (found by walking up from the
+            current working directory tree).
+            It can be a URL or a file system path.
+            Both HTTP and SSH protocols are supported for online Git repos
+            (e.g. [user@]server:project.git).
+    Returns:
+        List[str]: Names of the Git branches.
+    """
+    with Repo.open(repo) as _repo:
+        return _repo.scm.list_branches()
+
+
+def all_commits(repo: Optional[str] = None) -> List[str]:
+    """Get all Git commits in a DVC repository.
+
+    Args:
+        repo (str, optional): location of the DVC repository.
+            Defaults to the current project (found by walking up from the
+            current working directory tree).
+            It can be a URL or a file system path.
+            Both HTTP and SSH protocols are supported for online Git repos
+            (e.g. [user@]server:project.git).
+    Returns:
+        List[str]: SHAs of the Git commits.
+    """
+    with Repo.open(repo) as _repo:
+        return _repo.scm.list_all_commits()
+
+
+def all_tags(repo: Optional[str] = None) -> List[str]:
+    """Get all Git tags in a DVC repository.
+
+    Args:
+        repo (str, optional): location of the DVC repository.
+            Defaults to the current project (found by walking up from the
+            current working directory tree).
+            It can be a URL or a file system path.
+            Both HTTP and SSH protocols are supported for online Git repos
+            (e.g. [user@]server:project.git).
+    Returns:
+        List[str]: Names of the Git tags.
+    """
+    with Repo.open(repo) as _repo:
+        return _repo.scm.list_tags()

dvc/api/show.py

@@ -1,18 +1,166 @@
+import typing
 from collections import Counter
 from typing import Dict, Iterable, Optional, Union
 
 from funcy import first
 
-from dvc.exceptions import DvcException
 from dvc.repo import Repo
 
 
+def _onerror_raise(exception: Exception, *args, **kwargs):
+    raise exception
+
+
+def _postprocess(results):
+    processed: Dict[str, Dict] = {}
+    for rev, rev_data in results.items():
+        if not rev_data:
+            continue
+
+        processed[rev] = {}
+
+        counts: typing.Counter[str] = Counter()
+        for file_data in rev_data["data"].values():
+            for k in file_data["data"]:
+                counts[k] += 1
+
+        for file_name, file_data in rev_data["data"].items():
+            to_merge = {
+                (k if counts[k] == 1 else f"{file_name}:{k}"): v
+                for k, v in file_data["data"].items()
+            }
+            processed[rev] = {**processed[rev], **to_merge}
+
+    if "workspace" in processed:
+        del processed["workspace"]
+
+    return processed
+
+
+def metrics_show(
+    *targets: str,
+    repo: Optional[str] = None,
+    rev: Optional[str] = None,
+    config: Optional[Dict] = None,
+) -> Dict:
+    """Get metrics tracked in `repo`.
+
+    Without arguments, this function will retrieve all metrics from all tracked
+    metric files, for the current working tree.
+
+    See the options below to restrict the metrics retrieved.
+
+    Args:
+        *targets (str, optional): Names of the metric files to retrieve
+        metrics from. For example, "classifier_eval.json,
+        clustering_eval.json".
+        If no `targets` are provided, all metric files tracked in `dvc.yaml`
+        will be used.
+        Note that targets don't necessarily have to be defined in `dvc.yaml`.
+        repo (str, optional): Location of the DVC repository.
+            Defaults to the current project (found by walking up from the
+            current working directory tree).
+            It can be a URL or a file system path.
+            Both HTTP and SSH protocols are supported for online Git repos
+            (e.g. [user@]server:project.git).
+        rev (str, optional): Name of the `Git revision`_ to retrieve metrics
+            from.
+            Defaults to `None`.
+            An example of git revision can be a branch or tag name, a commit
+            hash or a dvc experiment name.
+            If `repo` is not a Git repo, this option is ignored.
+            If `None`, the current working tree will be used.
+        config (dict, optional): config to be passed through to DVC project.
+            Defaults to `None`.
+
+    Returns:
+        Dict: See Examples below.
+
+    Examples:
+
+        - No arguments.
+
+        Working on https://github.com/iterative/example-get-started
+
+        >>> import dvc.api
+        >>> metrics = dvc.api.metrics_show()
+        >>> print(json.dumps(metrics, indent=4))
+        {
+            "avg_prec": 0.9249974999612706,
+            "roc_auc": 0.9460213440787918
+        }
+
+        ---
+
+        - Using `rev`.
+
+        Working on https://github.com/iterative/example-get-started
+
+        >>> import json
+        >>> import dvc.api
+        >>> metrics = dvc.api.metrics_show(rev="tune-hyperparams")
+        >>> print(json.dumps(metrics, indent=4))
+        {
+            "avg_prec": 0.9268792615819422,
+            "roc_auc": 0.945093365854111
+        }
+
+        ---
+
+        - Using `targets`.
+
+        Working on https://github.com/iterative/example-get-started
+
+        >>> import json
+        >>> import dvc.api
+        >>> metrics = dvc.api.metrics_show("evaluation.json")
+        >>> print(json.dumps(metrics, indent=4))
+        {
+            "avg_prec": 0.9249974999612706,
+            "roc_auc": 0.9460213440787918
+        }
+
+        ---
+
+        - Git URL as `repo`.
+
+        >>> import json
+        >>> import dvc.api
+        >>> metrics = dvc.api.metrics_show(
+        ...     repo="https://github.com/iterative/demo-fashion-mnist")
+        >>> print(json.dumps(metrics, indent=4))
+        {
+            "loss": 0.25284987688064575,
+            "accuracy": 0.9071000218391418
+        }
+
+
+    .. _Git revision:
+        https://git-scm.com/docs/revisions
+    """
+
+    with Repo.open(repo, config=config) as _repo:
+        metrics = _repo.metrics.show(
+            targets=targets,
+            revs=rev if rev is None else [rev],
+            onerror=_onerror_raise,
+        )
+
+    metrics = _postprocess(metrics)
+
+    if not metrics:
+        return {}
+
+    return metrics[first(metrics)]
+
+
 def params_show(
     *targets: str,
     repo: Optional[str] = None,
     stages: Optional[Union[str, Iterable[str]]] = None,
     rev: Optional[str] = None,
     deps: bool = False,
+    config: Optional[Dict] = None,
 ) -> Dict:
     """Get parameters tracked in `repo`.
 
@@ -51,13 +199,12 @@ def params_show(
         deps (bool, optional): Whether to retrieve only parameters that are
             stage dependencies or not.
             Defaults to `False`.
+        config (dict, optional): config to be passed through to DVC project.
+            Defaults to `None`.
 
     Returns:
         Dict: See Examples below.
 
-    Raises:
-        DvcException: If no params are found in `repo`.
-
     Examples:
 
         - No arguments.
@@ -238,35 +385,7 @@ def params_show(
     if isinstance(stages, str):
         stages = [stages]
 
-    def _onerror_raise(result: Dict, exception: Exception, *args, **kwargs):
-        raise exception
-
-    def _postprocess(params):
-        processed = {}
-        for rev, rev_data in params.items():
-            processed[rev] = {}
-
-            counts = Counter()
-            for file_data in rev_data["data"].values():
-                for k in file_data["data"]:
-                    counts[k] += 1
-
-            for file_name, file_data in rev_data["data"].items():
-                to_merge = {
-                    (k if counts[k] == 1 else f"{file_name}:{k}"): v
-                    for k, v in file_data["data"].items()
-                }
-                processed[rev] = {**processed[rev], **to_merge}
-
-        if "workspace" in processed:
-            del processed["workspace"]
-
-        if not processed:
-            raise DvcException("No params found")
-
-        return processed[first(processed)]
-
-    with Repo.open(repo) as _repo:
+    with Repo.open(repo, config=config) as _repo:
         params = _repo.params.show(
             revs=rev if rev is None else [rev],
             targets=targets,
@@ -275,4 +394,9 @@ def params_show(
             stages=stages,
         )
 
-    return _postprocess(params)
+    params = _postprocess(params)
+
+    if not params:
+        return {}
+
+    return params[first(params)]

dvc/build.py

@@ -0,0 +1,10 @@
+from typing import Optional
+
+try:
+    # file is created during dvc build
+    # pylint:disable=unused-import
+    from . import _build  # type: ignore[attr-defined, import]
+
+    PKG: Optional[str] = _build.PKG  # type: ignore[assignment]
+except ImportError:
+    PKG = None  # type: ignore[assignment]

dvc/cachemgr.py

@@ -0,0 +1,138 @@
+import os
+from typing import TYPE_CHECKING, Optional, Tuple
+
+from dvc.fs import GitFileSystem, Schemes
+from dvc_data.hashfile.db import get_odb
+from dvc_data.hashfile.hash import DEFAULT_ALGORITHM
+
+if TYPE_CHECKING:
+    from dvc.repo import Repo
+
+LEGACY_HASH_NAMES = {"md5-dos2unix", "params"}
+
+
+def _get_odb(
+    repo,
+    settings,
+    fs=None,
+    prefix: Optional[Tuple[str, ...]] = None,
+    hash_name: Optional[str] = None,
+    **kwargs,
+):
+    from dvc.fs import get_cloud_fs
+
+    if not settings:
+        return None
+
+    cls, config, fs_path = get_cloud_fs(repo.config, **settings)
+    fs = fs or cls(**config)
+    if prefix:
+        fs_path = fs.path.join(fs_path, *prefix)
+    if hash_name:
+        config["hash_name"] = hash_name
+    return get_odb(fs, fs_path, state=repo.state, **config)
+
+
+class CacheManager:
+    CACHE_DIR = "cache"
+    FILES_DIR = "files"
+
+    def __init__(self, repo):
+        self._repo = repo
+        self.config = config = repo.config["cache"]
+        self._odb = {}
+
+        default = None
+        if repo and repo.local_dvc_dir:
+            default = os.path.join(repo.local_dvc_dir, self.CACHE_DIR)
+
+        local = config.get("local")
+
+        if local:
+            settings = {"name": local}
+        elif "dir" not in config and not default:
+            settings = None
+        else:
+            from dvc.config_schema import LOCAL_COMMON
+
+            url = config.get("dir") or default
+            settings = {"url": url}
+            for opt in LOCAL_COMMON:
+                if opt in config:
+                    settings[str(opt)] = config.get(opt)
+
+        kwargs = {}
+        if not isinstance(repo.fs, GitFileSystem):
+            kwargs["fs"] = repo.fs
+
+        odb = _get_odb(
+            repo,
+            settings,
+            prefix=(self.FILES_DIR, DEFAULT_ALGORITHM),
+            **kwargs,
+        )
+        self._odb["repo"] = odb
+        self._odb[Schemes.LOCAL] = odb
+        legacy_odb = _get_odb(repo, settings, hash_name="md5-dos2unix", **kwargs)
+        self._odb["legacy"] = legacy_odb
+
+    def _init_odb(self, schemes):
+        for scheme in schemes:
+            remote = self.config.get(scheme)
+            settings = {"name": remote} if remote else None
+            self._odb[scheme] = _get_odb(
+                self._repo,
+                settings,
+                prefix=(self.FILES_DIR, DEFAULT_ALGORITHM),
+            )
+
+    def __getattr__(self, name):
+        try:
+            return self._odb[name]
+        except KeyError as exc:
+            raise AttributeError from exc
+
+    def by_scheme(self):
+        yield from self._odb.items()
+
+    @property
+    def local_cache_dir(self) -> str:
+        """Return base local cache directory without any prefixes.
+
+        (i.e. `dvc cache dir`).
+        """
+        return self.legacy.path
+
+
+def migrate_2_to_3(repo: "Repo", dry: bool = False):
+    """Migrate legacy 2.x objects to 3.x cache.
+
+    Legacy 'md5-dos2unix' objects will be re-hashed with 'md5', added to 3.x cache,
+    and then a link from the legacy 2.x location to the 3.x location will be created.
+    """
+    from dvc.fs.callbacks import TqdmCallback
+    from dvc.ui import ui
+    from dvc_data.hashfile.db.migrate import migrate, prepare
+
+    src = repo.cache.legacy
+    dest = repo.cache.local
+    if dry:
+        oids = list(src._list_oids())  # pylint: disable=protected-access
+        ui.write(
+            f"{len(oids)} files will be re-hashed and migrated to the DVC 3.0 cache "
+            "location."
+        )
+        return
+
+    with TqdmCallback(
+        desc="Computing DVC 3.0 hashes",
+        unit="files",
+    ) as cb:
+        migration = prepare(src, dest, callback=cb)
+
+    with TqdmCallback(
+        desc="Migrating to DVC 3.0 cache",
+        unit="files",
+    ) as cb:
+        count = migrate(migration, callback=cb)
+    ui.write(f"Migrated {count} files to DVC 3.0 cache location.")

dvc/cli/__init__.py

@@ -39,13 +39,17 @@ def parse_args(argv=None):
 
 def _log_unknown_exceptions() -> None:
     from dvc.info import get_dvc_info
-    from dvc.logger import FOOTER
+    from dvc.ui import ui
+    from dvc.utils import colorize
 
     logger.exception("unexpected error")
     if logger.isEnabledFor(logging.DEBUG):
         logger.debug("Version info for developers:\n%s", get_dvc_info())
-    logger.info(FOOTER)
-    return None
+
+    q = colorize("Having any troubles?", "yellow")
+    link = colorize("https://dvc.org/support", "blue")
+    footer = f"\n{q} Hit us up at {link}, we are always happy to help!"
+    ui.error_write(footer)
 
 
 def _log_exceptions(exc: Exception) -> Optional[int]:
@@ -57,9 +61,11 @@ def _log_exceptions(exc: Exception) -> Optional[int]:
 
         if exc.errno == errno.EMFILE:
             logger.exception(
-                "too many open files, please visit "
-                "{} to see how to handle this "
-                "problem".format(error_link("many-files")),
+                (
+                    "too many open files, please visit "
+                    "%s to see how to handle this problem"
+                ),
+                error_link("many-files"),
                 extra={"tb_only": True},
             )
         else:
@@ -69,7 +75,7 @@ def _log_exceptions(exc: Exception) -> Optional[int]:
     from dvc.fs import AuthError, ConfigError, RemoteMissingDepsError
 
     if isinstance(exc, RemoteMissingDepsError):
-        from dvc.utils.pkg import PKG
+        from dvc import PKG
 
         proto = exc.protocol
         by_pkg = {
@@ -77,11 +83,11 @@ def _log_exceptions(exc: Exception) -> Optional[int]:
             "conda": f"conda install -c conda-forge dvc-{proto}",
         }
 
-        cmd = by_pkg.get(PKG)
-        if cmd:
+        if PKG in by_pkg:
             link = format_link("https://dvc.org/doc/install")
+            cmd = by_pkg.get(PKG)
             hint = (
-                f"To install dvc with those dependencies, run:\n"
+                "To install dvc with those dependencies, run:\n"
                 "\n"
                 f"\t{cmd}\n"
                 "\n"
@@ -92,8 +98,10 @@ def _log_exceptions(exc: Exception) -> Optional[int]:
             hint = f"\nPlease report this bug to {link}. Thank you!"
 
         logger.exception(
-            f"URL '{exc.url}' is supported but requires these missing "
-            f"dependencies: {exc.missing_deps}. {hint}",
+            "URL '%s' is supported but requires these missing dependencies: %s. %s",
+            exc.url,
+            exc.missing_deps,
+            hint,
             extra={"tb_only": True},
         )
         return None
@@ -102,7 +110,9 @@ def _log_exceptions(exc: Exception) -> Optional[int]:
         link = format_link("https://man.dvc.org/remote/modify")
         logger.exception("configuration error")
         logger.exception(
-            f"{exc!s}\nLearn more about configuration settings at {link}.",
+            "%s\nLearn more about configuration settings at %s.",
+            exc,
+            link,
             extra={"tb_only": True},
         )
         return 251
@@ -114,9 +124,14 @@ def _log_exceptions(exc: Exception) -> Optional[int]:
 
         directory = relpath(exc.directory)
         logger.exception(
-            f"Could not open pickled '{exc.type}' cache.\n"
-            f"Remove the '{directory}' directory and then retry this command."
-            f"\nSee {error_link('pickle')} for more information.",
+            (
+                "Could not open pickled '%s' cache.\n"
+                "Remove the '%s' directory and then retry this command."
+                "\nSee %s for more information."
+            ),
+            exc.type,
+            directory,
+            error_link("pickle"),
             extra={"tb_only": True},
         )
         return None
@@ -131,7 +146,7 @@ def _log_exceptions(exc: Exception) -> Optional[int]:
     return None
 
 
-def main(argv=None):  # noqa: C901
+def main(argv=None):  # noqa: C901, PLR0912, PLR0915
     """Main entry point for dvc CLI.
 
     Args:
@@ -143,7 +158,7 @@ def main(argv=None):  # noqa: C901
     from dvc._debug import debugtools
     from dvc.config import ConfigError
     from dvc.exceptions import DvcException, NotDvcRepoError
-    from dvc.logger import disable_other_loggers, set_loggers_level
+    from dvc.logger import set_loggers_level
 
     # NOTE: stderr/stdout may be closed if we are running from dvc.daemon.
     # On Linux we directly call cli.main after double forking and closing
@@ -156,9 +171,8 @@ def main(argv=None):  # noqa: C901
         logging.disable(logging.INFO)
 
     args = None
-    disable_other_loggers()
 
-    outerLogLevel = logger.level
+    outer_log_level = logger.level
     try:
         args = parse_args(argv)
 
@@ -168,12 +182,22 @@ def main(argv=None):  # noqa: C901
         elif args.verbose == 1:
             level = logging.DEBUG
         elif args.verbose > 1:
-            level = logging.TRACE
+            level = logging.TRACE  # type: ignore[attr-defined]
 
         if level is not None:
             set_loggers_level(level)
 
-        logger.trace(args)
+        if level and level <= logging.DEBUG:
+            from platform import platform, python_implementation, python_version
+
+            from dvc import PKG, __version__
+
+            pyv = f"{python_implementation()} {python_version()}"
+            pkg = f" ({PKG})" if PKG else ""
+            logger.debug("v%s%s, %s on %s", __version__, pkg, pyv, platform())
+            logger.debug("command: %s", " ".join(argv or sys.argv))
+
+        logger.trace(args)  # type: ignore[attr-defined]
 
         if not sys.stdout.closed and not args.quiet:
             from dvc.ui import ui
@@ -206,7 +230,7 @@ def main(argv=None):  # noqa: C901
         logger.exception("")
     except DvcParserError:
         ret = 254
-    except Exception as exc:  # noqa, pylint: disable=broad-except
+    except Exception as exc:  # noqa: BLE001, pylint: disable=broad-except
         # pylint: disable=no-member
         ret = _log_exceptions(exc) or 255
 
@@ -218,9 +242,9 @@ def main(argv=None):  # noqa: C901
 
         return ret
     finally:
-        logger.setLevel(outerLogLevel)
+        logger.setLevel(outer_log_level)
 
-        from dvc.external_repo import clean_repos
+        from dvc.repo.open_repo import clean_repos
 
         # Remove cached repos in the end of the call, these are anonymous
         # so won't be reused by any other subsequent run anyway.

dvc/cli/actions.py

@@ -1,20 +0,0 @@
-from argparse import _AppendAction
-
-
-class CommaSeparatedArgs(_AppendAction):  # pylint: disable=protected-access
-    def __call__(self, parser, namespace, values, option_string=None):
-        from funcy import ldistinct
-
-        items = getattr(namespace, self.dest) or []
-        items.extend(map(str.strip, values.split(",")))
-        setattr(namespace, self.dest, ldistinct(items))
-
-
-class KeyValueArgs(_AppendAction):
-    def __call__(self, parser, namespace, values, option_string=None):
-        items = getattr(namespace, self.dest) or {}
-        for value in filter(bool, values):
-            key, _, value = value.partition("=")
-            items[key.strip()] = value
-
-        setattr(namespace, self.dest, items)

dvc/cli/command.py

@@ -1,6 +1,10 @@
 import logging
 import os
 from abc import ABC, abstractmethod
+from typing import TYPE_CHECKING, Any
+
+if TYPE_CHECKING:
+    from dvc.config import Config
 
 logger = logging.getLogger(__name__)
 
@@ -8,13 +12,13 @@ logger = logging.getLogger(__name__)
 class CmdBase(ABC):
     UNINITIALIZED = False
 
-    def __init__(self, args):
+    def __init__(self, args: Any):
         from dvc.repo import Repo
 
         os.chdir(args.cd)
 
         self.repo: "Repo" = Repo(uninitialized=self.UNINITIALIZED)
-        self.config = self.repo.config
+        self.config: "Config" = self.repo.config
         self.args = args
 
     def do_run(self):

dvc/cli/parser.py

@@ -2,6 +2,7 @@
 import argparse
 import logging
 import os
+from functools import lru_cache
 
 from dvc import __version__
 from dvc.commands import (
@@ -40,7 +41,6 @@ from dvc.commands import (
     remove,
     repro,
     root,
-    run,
     stage,
     unprotect,
     update,
@@ -61,7 +61,6 @@ COMMANDS = [
     remove,
     move,
     unprotect,
-    run,
     repro,
     data_sync,
     gc,
@@ -138,7 +137,6 @@ def get_parent_parser():
     from dvc._debug import add_debugging_flags
 
     parent_parser = argparse.ArgumentParser(add_help=False)
-    add_debugging_flags(parent_parser)
     log_level_group = parent_parser.add_mutually_exclusive_group()
     log_level_group.add_argument(
         "-q", "--quiet", action="count", default=0, help="Be quiet."
@@ -146,10 +144,12 @@ def get_parent_parser():
     log_level_group.add_argument(
         "-v", "--verbose", action="count", default=0, help="Be verbose."
     )
+    add_debugging_flags(parent_parser)
 
     return parent_parser
 
 
+@lru_cache(maxsize=1)
 def get_main_parser():
     parent_parser = get_parent_parser()
 

dvc/cli/utils.py

@@ -1,3 +1,27 @@
+import argparse
+
+
+class DictAction(argparse.Action):
+    def __call__(self, parser, args, values, option_string=None):  # noqa: ARG002
+        d = getattr(args, self.dest) or {}
+
+        if isinstance(values, list):
+            kvs = values
+        else:
+            kvs = [values]
+
+        for kv in kvs:
+            key, value = kv.split("=")
+            if not value:
+                raise argparse.ArgumentError(
+                    self,
+                    f'Could not parse argument "{values}" as k1=v1 k2=v2 ... format',
+                )
+            d[key] = value
+
+        setattr(args, self.dest, d)
+
+
 def fix_subparsers(subparsers):
     """Workaround for bug in Python 3. See more info at:
     https://bugs.python.org/issue16308
@@ -16,9 +40,7 @@ def append_doc_link(help_message, path):
     if not path:
         return help_message
     doc_base = "https://man.dvc.org/"
-    return "{message}\nDocumentation: {link}".format(
-        message=help_message, link=format_link(doc_base + path)
-    )
+    return f"{help_message}\nDocumentation: {format_link(doc_base + path)}"
 
 
 def hide_subparsers_from_help(subparsers):
@@ -28,7 +50,5 @@ def hide_subparsers_from_help(subparsers):
     # Need to set `add_help=False`, but avoid setting `help`
     # (not even to `argparse.SUPPPRESS`).
     # NOTE: The argument is the parent subparser, not the subcommand parser.
-    cmds = [
-        cmd for cmd, parser in subparsers.choices.items() if parser.add_help
-    ]
+    cmds = [cmd for cmd, parser in subparsers.choices.items() if parser.add_help]
     subparsers.metavar = "{{{}}}".format(",".join(cmds))

dvc/commands/add.py

@@ -2,71 +2,61 @@ import argparse
 import logging
 
 from dvc.cli import completion
-from dvc.cli.actions import KeyValueArgs
 from dvc.cli.command import CmdBase
 from dvc.cli.utils import append_doc_link
 
 logger = logging.getLogger(__name__)
 
 
-def _add_annotating_args(parser: argparse.ArgumentParser) -> None:
-    parser.add_argument(
-        "--desc",
-        type=str,
-        metavar="<text>",
-        help="User description of the data.",
-    )
-    parser.add_argument(
-        "--meta",
-        metavar="key=value",
-        nargs=1,
-        action=KeyValueArgs,
-        help="Custom metadata to add to the data.",
-    )
-    parser.add_argument(
-        "--label",
-        dest="labels",
-        type=str,
-        action="append",
-        metavar="<str>",
-        help="Label for the data.",
-    )
-    parser.add_argument(
-        "--type",
-        type=str,
-        metavar="<str>",
-        help="Type of the data.",
-    )
-
-
 class CmdAdd(CmdBase):
+    def validate_args(self) -> None:
+        from dvc.exceptions import InvalidArgumentError
+
+        args = self.args
+        invalid_opt = None
+
+        if args.to_remote or args.out:
+            message = "{option} can't be used with "
+            message += "--to-remote" if args.to_remote else "--out"
+            if len(args.targets) != 1:
+                invalid_opt = "multiple targets"
+            elif args.glob:
+                invalid_opt = "--glob option"
+            elif args.no_commit:
+                invalid_opt = "--no-commit option"
+        else:
+            message = "{option} can't be used without --to-remote"
+            if args.remote:
+                invalid_opt = "--remote"
+            elif args.remote_jobs:
+                invalid_opt = "--remote-jobs"
+
+        if invalid_opt is not None:
+            raise InvalidArgumentError(message.format(option=invalid_opt))
+
     def run(self):
-        from dvc.exceptions import (
-            DvcException,
-            RecursiveAddingWhileUsingFilename,
-        )
+        from dvc.exceptions import DvcException, InvalidArgumentError
 
         try:
-            if len(self.args.targets) > 1 and self.args.file:
-                raise RecursiveAddingWhileUsingFilename()
+            self.validate_args()
+        except InvalidArgumentError:
+            logger.exception("")
+            return 1
 
+        try:
             self.repo.add(
                 self.args.targets,
-                recursive=self.args.recursive,
                 no_commit=self.args.no_commit,
-                fname=self.args.file,
-                external=self.args.external,
                 glob=self.args.glob,
-                desc=self.args.desc,
                 out=self.args.out,
-                type=self.args.type,
-                labels=self.args.labels,
-                meta=self.args.meta,
                 remote=self.args.remote,
                 to_remote=self.args.to_remote,
-                jobs=self.args.jobs,
+                remote_jobs=self.args.remote_jobs,
+                force=self.args.force,
             )
-
+        except FileNotFoundError:
+            logger.exception("")
+            return 1
         except DvcException:
             logger.exception("")
             return 1
@@ -83,36 +73,18 @@ def add_parser(subparsers, parent_parser):
         help=ADD_HELP,
         formatter_class=argparse.RawDescriptionHelpFormatter,
     )
-    parser.add_argument(
-        "-R",
-        "--recursive",
-        action="store_true",
-        default=False,
-        help="Recursively add files under directory targets.",
-    )
     parser.add_argument(
         "--no-commit",
         action="store_true",
         default=False,
         help="Don't put files/directories into cache.",
     )
-    parser.add_argument(
-        "--external",
-        action="store_true",
-        default=False,
-        help="Allow targets that are outside of the DVC repository.",
-    )
     parser.add_argument(
         "--glob",
         action="store_true",
         default=False,
         help="Allows targets containing shell-style wildcards.",
     )
-    parser.add_argument(
-        "--file",
-        help="Specify name of the .dvc file this command will generate.",
-        metavar="<filename>",
-    )
     parser.add_argument(
         "-o",
         "--out",
@@ -132,8 +104,7 @@ def add_parser(subparsers, parent_parser):
         metavar="<name>",
     )
     parser.add_argument(
-        "-j",
-        "--jobs",
+        "--remote-jobs",
         type=int,
         help=(
             "Only used along with '--to-remote'. "
@@ -143,8 +114,13 @@ def add_parser(subparsers, parent_parser):
         ),
         metavar="<number>",
     )
-
-    _add_annotating_args(parser)
+    parser.add_argument(
+        "-f",
+        "--force",
+        action="store_true",
+        default=False,
+        help="Override local file or folder if exists.",
+    )
     parser.add_argument(
         "targets", nargs="+", help="Input files/directories to add."
     ).complete = completion.FILE

dvc/commands/cache.py

@@ -1,6 +1,8 @@
 import argparse
+import os
 
 from dvc.cli import completion
+from dvc.cli.command import CmdBase
 from dvc.cli.utils import append_doc_link, fix_subparsers
 from dvc.commands.config import CmdConfig
 from dvc.ui import ui
@@ -9,13 +11,21 @@ from dvc.ui import ui
 class CmdCacheDir(CmdConfig):
     def run(self):
         if self.args.value is None and not self.args.unset:
+            from dvc.config import ConfigError
+
             if self.args.level:
                 conf = self.config.read(level=self.args.level)
             else:
                 # Use merged config with default values
                 conf = self.config
-            self._check(conf, False, "cache", "dir")
-            ui.write(conf["cache"]["dir"])
+            try:
+                self._check(conf, False, "cache", "dir")
+                path = conf["cache"]["dir"]
+            except ConfigError:
+                if not self.config.dvc_dir or self.args.level:
+                    raise
+                path = os.path.join(self.config.dvc_dir, "cache")
+            ui.write(path)
             return 0
         with self.config.edit(level=self.args.level) as conf:
             if self.args.unset:
@@ -27,6 +37,14 @@ class CmdCacheDir(CmdConfig):
         return 0
 
 
+class CmdCacheMigrate(CmdBase):
+    def run(self):
+        from dvc.cachemgr import migrate_2_to_3
+
+        migrate_2_to_3(self.repo, dry=self.args.dry)
+        return 0
+
+
 def add_parser(subparsers, parent_parser):
     from dvc.commands.config import parent_config_parser
 
@@ -42,11 +60,9 @@ def add_parser(subparsers, parent_parser):
 
     cache_subparsers = cache_parser.add_subparsers(
         dest="cmd",
-        help="Use `dvc cache CMD --help` for command-specific " "help.",
+        help="Use `dvc cache CMD --help` for command-specific help.",
     )
 
-    fix_subparsers(cache_subparsers)
-
     parent_cache_config_parser = argparse.ArgumentParser(
         add_help=False, parents=[parent_config_parser]
     )
@@ -68,10 +84,32 @@ def add_parser(subparsers, parent_parser):
     )
     cache_dir_parser.add_argument(
         "value",
-        help="Path to cache directory. Relative paths are resolved relative "
-        "to the current directory and saved to config relative to the "
-        "config file location. If no path is provided, it returns the "
-        "current cache directory.",
+        help=(
+            "Path to cache directory. Relative paths are resolved relative "
+            "to the current directory and saved to config relative to the "
+            "config file location. If no path is provided, it returns the "
+            "current cache directory."
+        ),
         nargs="?",
     ).complete = completion.DIR
     cache_dir_parser.set_defaults(func=CmdCacheDir)
+
+    CACHE_MIGRATE_HELP = "Migrate cached files to the DVC 3.0 cache location."
+    cache_migrate_parser = cache_subparsers.add_parser(
+        "migrate",
+        parents=[parent_parser],
+        description=append_doc_link(CACHE_HELP, "cache/migrate"),
+        help=CACHE_MIGRATE_HELP,
+        formatter_class=argparse.RawDescriptionHelpFormatter,
+    )
+    cache_migrate_parser.add_argument(
+        "--dry",
+        help=(
+            "Only print actions which would be taken without actually migrating "
+            "any data."
+        ),
+        action="store_true",
+    )
+    cache_migrate_parser.set_defaults(func=CmdCacheMigrate)
+
+    fix_subparsers(cache_subparsers)

dvc/commands/check_ignore.py

@@ -39,7 +39,7 @@ class CmdCheckIgnore(CmdBase):
                 target = input()
             except (KeyboardInterrupt, EOFError):
                 break
-            if target == "":
+            if not target:
                 break
             if not self._check_one_file(target):
                 ret = 0
@@ -62,9 +62,7 @@ class CmdCheckIgnore(CmdBase):
             raise DvcException("cannot have both `targets` and `--stdin`")
 
         if self.args.non_matching and not self.args.details:
-            raise DvcException(
-                "`--non-matching` is only valid with `--details`"
-            )
+            raise DvcException("`--non-matching` is only valid with `--details`")
 
         if self.args.all and not self.args.details:
             raise DvcException("`--all` is only valid with `--details`")
@@ -80,9 +78,7 @@ class CmdCheckIgnore(CmdBase):
 
 
 def add_parser(subparsers, parent_parser):
-    ADD_HELP = (
-        "Check whether files or directories are excluded due to `.dvcignore`."
-    )
+    ADD_HELP = "Check whether files or directories are excluded due to `.dvcignore`."
 
     parser = subparsers.add_parser(
         "check-ignore",
@@ -103,16 +99,20 @@ def add_parser(subparsers, parent_parser):
         "--all",
         action="store_true",
         default=False,
-        help="Include the target paths which don’t match any pattern "
-        "in the `--details` list.",
+        help=(
+            "Include the target paths which don't match any pattern "
+            "in the `--details` list."
+        ),
     )
     parser.add_argument(
         "-n",
         "--non-matching",
         action="store_true",
         default=False,
-        help="Include the target paths which don’t match any pattern "
-        "in the `--details` list.",
+        help=(
+            "Include the target paths which don't match any pattern "
+            "in the `--details` list."
+        ),
     )
     parser.add_argument(
         "--stdin",

dvc/commands/checkout.py

@@ -22,9 +22,7 @@ def log_changes(stats):
             continue
 
         for entry in entries:
-            ui.write(
-                f"[{color}]{state[0].upper()}", entry, styled=True, sep="\t"
-            )
+            ui.write(f"[{color}]{state[0].upper()}", entry, styled=True, sep="\t")
 
 
 class CmdCheckout(CmdBase):
@@ -46,9 +44,7 @@ class CmdCheckout(CmdBase):
 
         if self.args.summary:
             default_message = "No changes."
-            msg = get_summary(
-                sorted(stats.items(), key=operator.itemgetter(0))
-            )
+            msg = get_summary(sorted(stats.items(), key=operator.itemgetter(0)))
             ui.write(msg or default_message)
         else:
             log_changes(stats)

dvc/commands/commit.py

@@ -24,11 +24,7 @@ class CmdCommit(CmdBase):
                     force=self.args.force,
                 )
             except DvcException:
-                logger.exception(
-                    "failed to commit{}".format(
-                        (" " + target) if target else ""
-                    )
-                )
+                logger.exception("failed to commit%s", (" " + target) if target else "")
                 return 1
         return 0
 
@@ -51,7 +47,10 @@ def add_parser(subparsers, parent_parser):
         "--force",
         action="store_true",
         default=False,
-        help="Commit even if hash value for dependencies/outputs changed.",
+        help=(
+            "Commit data even if hash values for dependencies or",
+            "outputs did not change.",
+        ),
     )
     commit_parser.add_argument(
         "-d",

dvc/commands/completion.py

@@ -15,7 +15,7 @@ class CmdCompletion(CmdBaseNoRepo):
 
         shell = self.args.shell
         parser = self.args.parser
-        script = shtab.complete(parser, shell=shell, preamble=PREAMBLE)
+        script = shtab.complete(parser, shell=shell, preamble=PREAMBLE)  # nosec B604
         ui.write(script, force=True)
         return 0
 

dvc/commands/config.py

@@ -17,9 +17,7 @@ def _name_type(value):
     match = re.match(NAME_REGEX, value)
     if not match:
         raise argparse.ArgumentTypeError(
-            "name argument should look like "
-            "remote.name.option or "
-            "section.option"
+            "name argument should look like remote.name.option or section.option"
         )
     return (
         bool(match.group("remote")),
@@ -34,16 +32,15 @@ class CmdConfig(CmdBaseNoRepo):
 
         super().__init__(args)
 
-        self.config = Config(validate=False)
+        self.config = Config.from_cwd(validate=False)
 
     def run(self):
-        if self.args.show_origin:
-            if any((self.args.value, self.args.unset)):
-                logger.error(
-                    "--show-origin can't be used together with any of these "
-                    "options: -u/--unset, value"
-                )
-                return 1
+        if self.args.show_origin and (self.args.value or self.args.unset):
+            logger.error(
+                "--show-origin can't be used together with any of these "
+                "options: -u/--unset, value"
+            )
+            return 1
 
         if self.args.list:
             return self._list()
@@ -71,9 +68,7 @@ class CmdConfig(CmdBaseNoRepo):
 
         for level in levels:
             conf = self.config.read(level)
-            prefix = self._config_file_prefix(
-                self.args.show_origin, self.config, level
-            )
+            prefix = self._config_file_prefix(self.args.show_origin, self.config, level)
             configs = list(self._format_config(conf, prefix))
             if configs:
                 ui.write("\n".join(configs))
@@ -132,9 +127,7 @@ class CmdConfig(CmdBaseNoRepo):
             raise ConfigError(f"{name} '{section}' doesn't exist")
 
         if opt and opt not in conf[section]:
-            raise ConfigError(
-                f"option '{opt}' doesn't exist in {name} '{section}'"
-            )
+            raise ConfigError(f"option '{opt}' doesn't exist in {name} '{section}'")
 
     def _get_appropriate_levels(self, levels):
         if levels:

dvc/commands/daemon.py

@@ -46,7 +46,7 @@ def add_parser(subparsers, parent_parser):
 
     daemon_subparsers = daemon_parser.add_subparsers(
         dest="cmd",
-        help="Use `dvc daemon CMD --help` for command-specific " "help.",
+        help="Use `dvc daemon CMD --help` for command-specific help.",
     )
 
     fix_subparsers(daemon_subparsers)

dvc/commands/dag.py

@@ -9,11 +9,11 @@ if TYPE_CHECKING:
     from networkx import DiGraph
 
 
-def _show_ascii(G: "DiGraph"):
+def _show_ascii(graph: "DiGraph"):
     from dvc.dagascii import draw
     from dvc.repo.graph import get_pipelines
 
-    pipelines = get_pipelines(G)
+    pipelines = get_pipelines(graph)
 
     ret = []
     for pipeline in pipelines:
@@ -31,7 +31,7 @@ def _quote_label(node):
     return label
 
 
-def _show_dot(G: "DiGraph"):
+def _show_dot(graph: "DiGraph"):
     import io
 
     import networkx as nx
@@ -39,15 +39,15 @@ def _show_dot(G: "DiGraph"):
 
     dot_file = io.StringIO()
 
-    nx.relabel_nodes(G, _quote_label, copy=False)
-    write_dot(G.reverse(), dot_file)
+    nx.relabel_nodes(graph, _quote_label, copy=False)
+    write_dot(graph.reverse(), dot_file)
     return dot_file.getvalue()
 
 
-def _show_mermaid(G, markdown: bool = False):
+def _show_mermaid(graph, markdown: bool = False):
     from dvc.repo.graph import get_pipelines
 
-    pipelines = get_pipelines(G)
+    pipelines = get_pipelines(graph)
 
     graph = "flowchart TD"
 
@@ -86,9 +86,7 @@ def _collect_targets(repo, target, outs):
             targets.extend([str(out) for out in stage.outs])
             continue
 
-        for out in outs_trie.itervalues(  # noqa: B301
-            prefix=repo.fs.path.parts(path)
-        ):
+        for out in outs_trie.itervalues(prefix=repo.fs.path.parts(path)):  # noqa: B301
             targets.extend(str(out))
 
     return targets
@@ -102,43 +100,42 @@ def _transform(index, outs):
     def _relabel(node) -> str:
         return node.addressing if isinstance(node, Stage) else str(node)
 
-    G = index.outs_graph if outs else index.graph
-    return nx.relabel_nodes(G, _relabel, copy=True)
+    graph = index.outs_graph if outs else index.graph
+    return nx.relabel_nodes(graph, _relabel, copy=True)
 
 
-def _filter(G, targets, full):
+def _filter(graph, targets, full):
     import networkx as nx
 
     if not targets:
-        return G
+        return graph
 
-    H = G.copy()
+    new_graph = graph.copy()
     if not full:
         descendants = set()
         for target in targets:
-            descendants.update(nx.descendants(G, target))
+            descendants.update(nx.descendants(graph, target))
             descendants.add(target)
-        H.remove_nodes_from(set(G.nodes()) - descendants)
+        new_graph.remove_nodes_from(set(graph.nodes()) - descendants)
 
-    undirected = H.to_undirected()
+    undirected = new_graph.to_undirected()
     connected = set()
     for target in targets:
         connected.update(nx.node_connected_component(undirected, target))
 
-    H.remove_nodes_from(set(H.nodes()) - connected)
-
-    return H
+    new_graph.remove_nodes_from(set(new_graph.nodes()) - connected)
+    return new_graph
 
 
 def _build(repo, target=None, full=False, outs=False):
     targets = _collect_targets(repo, target, outs)
-    G = _transform(repo.index, outs)
-    return _filter(G, targets, full)
+    graph = _transform(repo.index, outs)
+    return _filter(graph, targets, full)
 
 
 class CmdDAG(CmdBase):
     def run(self):
-        G = _build(
+        graph = _build(
             self.repo,
             target=self.args.target,
             full=self.args.full,
@@ -146,12 +143,12 @@ class CmdDAG(CmdBase):
         )
 
         if self.args.dot:
-            ui.write(_show_dot(G))
+            ui.write(_show_dot(graph))
         elif self.args.mermaid or self.args.markdown:
-            ui.write(_show_mermaid(G, self.args.markdown))
+            ui.write(_show_mermaid(graph, self.args.markdown))
         else:
             with ui.pager():
-                ui.write(_show_ascii(G))
+                ui.write(_show_ascii(graph))
 
         return 0
 
@@ -179,7 +176,6 @@ def add_parser(subparsers, parent_parser):
     )
     dag_parser.add_argument(
         "--md",
-        "--show-md",
         action="store_true",
         default=False,
         dest="markdown",
@@ -204,7 +200,9 @@ def add_parser(subparsers, parent_parser):
     dag_parser.add_argument(
         "target",
         nargs="?",
-        help="Stage name or output to show pipeline for. "
-        "Finds all stages in the workspace by default.",
+        help=(
+            "Stage name or output to show pipeline for. "
+            "Finds all stages in the workspace by default."
+        ),
     )
     dag_parser.set_defaults(func=CmdDAG)

dvc/commands/data.py

@@ -1,18 +1,11 @@
 import argparse
 import logging
-from operator import itemgetter
-from typing import TYPE_CHECKING, Any, Dict, Iterable, Set
+from typing import TYPE_CHECKING
 
 from funcy import chunks, compact, log_durations
 
-from dvc.cli import completion
-from dvc.cli.actions import CommaSeparatedArgs
 from dvc.cli.command import CmdBase
-from dvc.cli.utils import (
-    append_doc_link,
-    fix_subparsers,
-    hide_subparsers_from_help,
-)
+from dvc.cli.utils import append_doc_link, fix_subparsers
 from dvc.ui import ui
 from dvc.utils import colorize
 
@@ -25,12 +18,14 @@ logger = logging.getLogger(__name__)
 
 class CmdDataStatus(CmdBase):
     COLORS = {
+        "not_in_remote": "red",
         "not_in_cache": "red",
         "committed": "green",
         "uncommitted": "yellow",
         "untracked": "cyan",
     }
     LABELS = {
+        "not_in_remote": "Not in remote",
         "not_in_cache": "Not in cache",
         "committed": "DVC committed changes",
         "uncommitted": "DVC uncommitted changes",
@@ -38,21 +33,21 @@ class CmdDataStatus(CmdBase):
         "unchanged": "DVC unchanged files",
     }
     HINTS = {
+        "not_in_remote": ('use "dvc push <file>..." to upload files',),
         "not_in_cache": ('use "dvc fetch <file>..." to download files',),
-        "committed": (
-            "git commit the corresponding dvc files to update the repo",
-        ),
+        "committed": ("git commit the corresponding dvc files to update the repo",),
         "uncommitted": (
             'use "dvc commit <file>..." to track changes',
             'use "dvc checkout <file>..." to discard changes',
         ),
         "untracked": (
-            'use "git add <file> ..." or '
-            '"dvc add <file>..." to commit to git or to dvc',
+            (
+                'use "git add <file> ..." or '
+                '"dvc add <file>..." to commit to git or to dvc'
+            ),
         ),
         "git_dirty": (
-            "there are {}changes not tracked by dvc, "
-            'use "git status" to see',
+            'there are {}changes not tracked by dvc, use "git status" to see',
         ),
     }
 
@@ -72,7 +67,7 @@ class CmdDataStatus(CmdBase):
             yield stage, items
 
     @classmethod
-    def _show_status(cls, status: "DataStatus") -> int:
+    def _show_status(cls, status: "DataStatus") -> int:  # noqa: C901
         git_info = status.pop("git")  # type: ignore[misc]
         result = dict(cls._process_status(status))
         if not result:
@@ -95,10 +90,7 @@ class CmdDataStatus(CmdBase):
                     ui.write(f"  ({hint})")
 
             if isinstance(stage_status, dict):
-                items = [
-                    ": ".join([state, file])
-                    for file, state in stage_status.items()
-                ]
+                items = [f"{state}: {file}" for file, state in stage_status.items()]
             else:
                 items = stage_status
 
@@ -114,10 +106,14 @@ class CmdDataStatus(CmdBase):
         return 0
 
     def run(self) -> int:
-        with log_durations(logger.trace, "in data_status"):  # type: ignore
+        with log_durations(
+            logger.trace, "in data_status"  # type: ignore[attr-defined]
+        ):
             status = self.repo.data_status(
                 granular=self.args.granular,
                 untracked_files=self.args.untracked_files,
+                not_in_remote=self.args.not_in_remote,
+                remote_refresh=self.args.remote_refresh,
             )
 
         if not self.args.unchanged:
@@ -131,65 +127,6 @@ class CmdDataStatus(CmdBase):
         return self._show_status(status)
 
 
-class CmdDataLs(CmdBase):
-    @staticmethod
-    def _show_table(
-        d: Iterable[Dict[str, Any]],
-        filter_types: Set[str],
-        filter_labels: Set[str],
-        markdown: bool = False,
-    ) -> None:
-        from rich.style import Style
-
-        from dvc.compare import TabularData
-
-        td = TabularData(
-            columns=["Path", "Type", "Labels", "Description"], fill_value="-"
-        )
-        for entry in sorted(d, key=itemgetter("path")):
-            typ = entry.get("type", "")
-            desc = entry.get("desc", "-")
-            labels = entry.get("labels", [])
-
-            if filter_types and typ not in filter_types:
-                continue
-            if filter_labels and filter_labels.isdisjoint(labels):
-                continue
-
-            rich_label = ui.rich_text()
-            for index, label in enumerate(labels):
-                if index:
-                    rich_label.append(",")
-                style = Style(bold=label in filter_labels, color="green")
-                rich_label.append(label, style=style)
-
-            if markdown and desc:
-                desc = desc.partition("\n")[0]
-
-            path = ui.rich_text(entry["path"], style="cyan")
-            type_style = Style(bold=typ in filter_types, color="yellow")
-            typ = ui.rich_text(entry.get("type", ""), style=type_style)
-            td.append([path, typ or "-", rich_label or "-", desc])
-
-        td.render(markdown=markdown, rich_table=True)
-
-    def run(self):
-        from dvc.repo.data import ls
-
-        filter_labels = set(self.args.labels)
-        filter_types = set(self.args.type)
-        d = ls(
-            self.repo, targets=self.args.targets, recursive=self.args.recursive
-        )
-        self._show_table(
-            d,
-            filter_labels=filter_labels,
-            filter_types=filter_types,
-            markdown=self.args.markdown,
-        )
-        return 0
-
-
 def add_parser(subparsers, parent_parser):
     data_parser = subparsers.add_parser(
         "data",
@@ -203,8 +140,7 @@ def add_parser(subparsers, parent_parser):
     fix_subparsers(data_subparsers)
 
     DATA_STATUS_HELP = (
-        "Show changes between the last git commit, "
-        "the dvcfiles and the workspace."
+        "Show changes between the last git commit, the dvcfiles and the workspace."
     )
     data_status_parser = data_subparsers.add_parser(
         "status",
@@ -219,13 +155,6 @@ def add_parser(subparsers, parent_parser):
         default=False,
         help="Show output in JSON format.",
     )
-    data_status_parser.add_argument(
-        "--show-json",
-        action="store_true",
-        default=False,
-        dest="json",
-        help=argparse.SUPPRESS,
-    )
     data_status_parser.add_argument(
         "--granular",
         action="store_true",
@@ -246,52 +175,16 @@ def add_parser(subparsers, parent_parser):
         nargs="?",
         help="Show untracked files.",
     )
+    data_status_parser.add_argument(
+        "--not-in-remote",
+        action="store_true",
+        default=False,
+        help="Show files not in remote.",
+    )
+    data_status_parser.add_argument(
+        "--no-remote-refresh",
+        dest="remote_refresh",
+        action="store_false",
+        help="Use cached remote index (don't check remote).",
+    )
     data_status_parser.set_defaults(func=CmdDataStatus)
-
-    DATA_LS_HELP = "List data tracked by DVC with its metadata."
-    data_ls_parser = data_subparsers.add_parser(
-        "ls",
-        aliases=["list"],
-        parents=[parent_parser],
-        description=append_doc_link(DATA_LS_HELP, "data/ls"),
-        formatter_class=argparse.RawDescriptionHelpFormatter,
-        add_help=False,
-    )
-    data_ls_parser.add_argument(
-        "--md",
-        "--show-md",
-        dest="markdown",
-        action="store_true",
-        default=False,
-        help="Show tabulated output in the Markdown format (GFM).",
-    )
-    data_ls_parser.add_argument(
-        "--type",
-        action=CommaSeparatedArgs,
-        default=[],
-        help="Comma-separated list of type to filter.",
-    )
-    data_ls_parser.add_argument(
-        "--labels",
-        action=CommaSeparatedArgs,
-        default=[],
-        help="Comma-separated list of labels to filter.",
-    )
-    data_ls_parser.add_argument(
-        "-R",
-        "--recursive",
-        action="store_true",
-        default=False,
-        help="Recursively list from the specified directories.",
-    )
-    data_ls_parser.add_argument(
-        "targets",
-        default=None,
-        nargs="*",
-        help=(
-            "Limit command scope to these tracked files/directories, "
-            ".dvc files, or stage names."
-        ),
-    ).complete = completion.DVCFILES_AND_STAGE
-    data_ls_parser.set_defaults(func=CmdDataLs)
-    hide_subparsers_from_help(data_subparsers)

dvc/commands/data_sync.py

@@ -40,6 +40,7 @@ class CmdDataPull(CmdDataBase):
                 recursive=self.args.recursive,
                 run_cache=self.args.run_cache,
                 glob=self.args.glob,
+                allow_missing=self.args.allow_missing,
             )
             self.log_summary(stats)
         except (CheckoutError, DvcException) as exc:
@@ -90,6 +91,8 @@ class CmdDataFetch(CmdDataBase):
                 with_deps=self.args.with_deps,
                 recursive=self.args.recursive,
                 run_cache=self.args.run_cache,
+                max_size=self.args.max_size,
+                types=self.args.types,
             )
             self.log_summary({"fetched": processed_files_count})
         except DvcException:
@@ -122,7 +125,7 @@ def shared_parent_parser():
             "Limit command scope to these tracked files/directories, "
             ".dvc files and stage names."
         ),
-    ).complete = completion.DVC_FILE
+    ).complete = completion.DVC_FILE  # type: ignore[attr-defined]
 
     return parent_parser
 
@@ -197,6 +200,12 @@ def add_parser(subparsers, _parent_parser):
         default=False,
         help=argparse.SUPPRESS,
     )
+    pull_parser.add_argument(
+        "--allow-missing",
+        action="store_true",
+        default=False,
+        help="Ignore errors if some of the files or directories are missing.",
+    )
     pull_parser.set_defaults(func=CmdDataPull)
 
     # Push
@@ -262,9 +271,7 @@ def add_parser(subparsers, _parent_parser):
     push_parser.set_defaults(func=CmdDataPush)
 
     # Fetch
-    FETCH_HELP = (
-        "Download files or directories from remote storage to the cache."
-    )
+    FETCH_HELP = "Download files or directories from remote storage to the cache."
 
     fetch_parser = subparsers.add_parser(
         "fetch",
@@ -302,7 +309,7 @@ def add_parser(subparsers, _parent_parser):
         "--with-deps",
         action="store_true",
         default=False,
-        help="Fetch cache for all dependencies of the " "specified target.",
+        help="Fetch cache for all dependencies of the specified target.",
     )
     fetch_parser.add_argument(
         "-R",
@@ -317,12 +324,26 @@ def add_parser(subparsers, _parent_parser):
         default=False,
         help="Fetch run history for all stages.",
     )
+    fetch_parser.add_argument(
+        "--max-size",
+        type=int,
+        help="Fetch data files/directories that are each below specified size (bytes).",
+    )
+    fetch_parser.add_argument(
+        "--type",
+        dest="types",
+        action="append",
+        default=[],
+        help=(
+            "Only fetch data files/directories that are of a particular "
+            "type (metrics, plots)."
+        ),
+        choices=["metrics", "plots"],
+    )
     fetch_parser.set_defaults(func=CmdDataFetch)
 
     # Status
-    STATUS_HELP = (
-        "Show changed stages, compare local cache and a remote storage."
-    )
+    STATUS_HELP = "Show changed stages, compare local cache and a remote storage."
 
     status_parser = subparsers.add_parser(
         "status",
@@ -360,24 +381,29 @@ def add_parser(subparsers, _parent_parser):
         "--all-branches",
         action="store_true",
         default=False,
-        help="Show status of a local cache compared to a remote repository "
-        "for all branches.",
+        help=(
+            "Show status of a local cache compared to a remote repository "
+            "for all branches."
+        ),
     )
     status_parser.add_argument(
         "-T",
         "--all-tags",
         action="store_true",
         default=False,
-        help="Show status of a local cache compared to a remote repository "
-        "for all tags.",
+        help=(
+            "Show status of a local cache compared to a remote repository for all tags."
+        ),
     )
     status_parser.add_argument(
         "-A",
         "--all-commits",
         action="store_true",
         default=False,
-        help="Show status of a local cache compared to a remote repository "
-        "for all commits.",
+        help=(
+            "Show status of a local cache compared to a remote repository "
+            "for all commits."
+        ),
     )
     status_parser.add_argument(
         "-d",
@@ -395,7 +421,6 @@ def add_parser(subparsers, _parent_parser):
     )
     status_parser.add_argument(
         "--json",
-        "--show-json",
         action="store_true",
         default=False,
         help="Show status in JSON format.",

dvc/commands/destroy.py

@@ -21,7 +21,7 @@ class CmdDestroy(CmdBase):
             )
 
             if not self.args.force and not ui.confirm(statement):
-                raise DvcException(
+                raise DvcException(  # noqa: TRY301
                     "cannot destroy without a confirmation from the user."
                     " Use `-f` to force."
                 )

dvc/commands/diff.py

@@ -109,12 +109,10 @@ class CmdDiff(CmdBase):
             ui.write()
 
         if not sum(summary.values()):
-            return None
+            return
 
         states_summary = ", ".join(
-            f"{summary[state]} {state}"
-            for state in states
-            if summary[state] > 0
+            f"{summary[state]} {state}" for state in states if summary[state] > 0
         )
         ui.write("files summary:", states_summary)
 
@@ -122,9 +120,7 @@ class CmdDiff(CmdBase):
         from dvc.exceptions import DvcException
 
         try:
-            diff = self.repo.diff(
-                self.args.a_rev, self.args.b_rev, self.args.targets
-            )
+            diff = self.repo.diff(self.args.a_rev, self.args.b_rev, self.args.targets)
             show_hash = self.args.show_hash
             hide_missing = self.args.b_rev or self.args.hide_missing
             if hide_missing:
@@ -133,9 +129,11 @@ class CmdDiff(CmdBase):
             for key, entries in diff.items():
                 entries = sorted(
                     entries,
-                    key=lambda entry: entry["path"]["old"]
-                    if isinstance(entry["path"], dict)
-                    else entry["path"],
+                    key=lambda entry: (
+                        entry["path"]["old"]
+                        if isinstance(entry["path"], dict)
+                        else entry["path"]
+                    ),
                 )
                 if not show_hash:
                     for entry in entries:
@@ -170,10 +168,7 @@ def add_parser(subparsers, parent_parser):
     diff_parser.add_argument(
         "--targets",
         nargs="*",
-        help=(
-            "Specific DVC-tracked files to compare. "
-            "Accepts one or more file paths."
-        ),
+        help="Specific DVC-tracked files to compare. Accepts one or more file paths.",
         metavar="<paths>",
     ).complete = completion.FILE
     diff_parser.add_argument(
@@ -184,12 +179,11 @@ def add_parser(subparsers, parent_parser):
     )
     diff_parser.add_argument(
         "b_rev",
-        help=("New Git commit to compare (defaults to the current workspace)"),
+        help="New Git commit to compare (defaults to the current workspace)",
         nargs="?",
     )
     diff_parser.add_argument(
         "--json",
-        "--show-json",
         help="Format the output into a JSON",
         action="store_true",
         default=False,
@@ -202,7 +196,6 @@ def add_parser(subparsers, parent_parser):
     )
     diff_parser.add_argument(
         "--md",
-        "--show-md",
         help="Show tabulated output in the Markdown format (GFM).",
         action="store_true",
         dest="markdown",

dvc/commands/experiments/__init__.py

@@ -1,17 +1,12 @@
 import argparse
 
-from dvc.cli.utils import (
-    append_doc_link,
-    fix_subparsers,
-    hide_subparsers_from_help,
-)
+from dvc.cli.utils import append_doc_link, fix_subparsers, hide_subparsers_from_help
 from dvc.commands.experiments import (
     apply,
     branch,
+    clean,
     diff,
     exec_run,
-    gc,
-    init,
     ls,
     pull,
     push,
@@ -25,10 +20,9 @@ from dvc.commands.experiments import (
 SUB_COMMANDS = [
     apply,
     branch,
+    clean,
     diff,
     exec_run,
-    gc,
-    init,
     ls,
     pull,
     push,
@@ -54,8 +48,7 @@ def add_parser(subparsers, parent_parser):
 
     experiments_subparsers = experiments_parser.add_subparsers(
         dest="cmd",
-        help="Use `dvc experiments CMD --help` to display "
-        "command-specific help.",
+        help="Use `dvc experiments CMD --help` to display command-specific help.",
     )
 
     fix_subparsers(experiments_subparsers)
@@ -85,6 +78,7 @@ def add_rev_selection_flags(
     experiments_subcmd_parser.add_argument(
         "--rev",
         type=str,
+        action="append",
         default=None,
         help=msg,
         metavar="<commit>",

dvc/commands/experiments/apply.py

@@ -4,25 +4,27 @@ import logging
 from dvc.cli import completion
 from dvc.cli.command import CmdBase
 from dvc.cli.utils import append_doc_link
+from dvc.ui import ui
 
 logger = logging.getLogger(__name__)
 
 
 class CmdExperimentsApply(CmdBase):
     def run(self):
-
-        self.repo.experiments.apply(
-            self.args.experiment, force=self.args.force
-        )
+        if not self.args.force:
+            ui.write(
+                "The --no-force option is deprecated and will be removed in a future"
+                " DVC release. To revert the result of 'exp apply', run:\n"
+                "\n\tgit reset --hard\n"
+                "\tgit stash apply refs/exps/apply/stash\n"
+            )
+        self.repo.experiments.apply(self.args.experiment)
 
         return 0
 
 
 def add_parser(experiments_subparsers, parent_parser):
-
-    EXPERIMENTS_APPLY_HELP = (
-        "Apply the changes from an experiment to your workspace."
-    )
+    EXPERIMENTS_APPLY_HELP = "Apply the changes from an experiment to your workspace."
     experiments_apply_parser = experiments_subparsers.add_parser(
         "apply",
         parents=[parent_parser],

dvc/commands/experiments/branch.py

@@ -9,14 +9,12 @@ logger = logging.getLogger(__name__)
 
 class CmdExperimentsBranch(CmdBase):
     def run(self):
-
         self.repo.experiments.branch(self.args.experiment, self.args.branch)
 
         return 0
 
 
 def add_parser(experiments_subparsers, parent_parser):
-
     EXPERIMENTS_BRANCH_HELP = "Promote an experiment to a Git branch."
     experiments_branch_parser = experiments_subparsers.add_parser(
         "branch",
@@ -29,6 +27,12 @@ def add_parser(experiments_subparsers, parent_parser):
         "experiment", help="Experiment to be promoted."
     )
     experiments_branch_parser.add_argument(
-        "branch", help="Name for the new Git branch"
+        "branch",
+        nargs="?",
+        default=None,
+        help=(
+            "Optional name for the new Git branch. "
+            "Defaults to '{experiment-name}-branch'."
+        ),
     )
     experiments_branch_parser.set_defaults(func=CmdExperimentsBranch)

dvc/commands/experiments/clean.py

@@ -0,0 +1,25 @@
+import argparse
+import logging
+
+from dvc.cli.command import CmdBase
+from dvc.cli.utils import append_doc_link
+
+logger = logging.getLogger(__name__)
+
+
+class CmdExperimentsClean(CmdBase):
+    def run(self):
+        self.repo.experiments.clean()
+        return 0
+
+
+def add_parser(experiments_subparsers, parent_parser):
+    EXPERIMENTS_CLEAN_HELP = "Cleanup experiments temporary internal files."
+    experiments_clean_parser = experiments_subparsers.add_parser(
+        "clean",
+        parents=[parent_parser],
+        description=append_doc_link(EXPERIMENTS_CLEAN_HELP, "exp/clean"),
+        help=EXPERIMENTS_CLEAN_HELP,
+        formatter_class=argparse.RawDescriptionHelpFormatter,
+    )
+    experiments_clean_parser.set_defaults(func=CmdExperimentsClean)

dvc/commands/experiments/diff.py

@@ -13,7 +13,6 @@ logger = logging.getLogger(__name__)
 
 class CmdExperimentsDiff(CmdBase):
     def run(self):
-
         try:
             diff = self.repo.experiments.diff(
                 a_rev=self.args.a_rev,
@@ -53,10 +52,7 @@ class CmdExperimentsDiff(CmdBase):
 
 
 def add_parser(experiments_subparsers, parent_parser):
-
-    EXPERIMENTS_DIFF_HELP = (
-        "Show changes between experiments in the DVC repository."
-    )
+    EXPERIMENTS_DIFF_HELP = "Show changes between experiments."
 
     experiments_diff_parser = experiments_subparsers.add_parser(
         "diff",
@@ -87,14 +83,12 @@ def add_parser(experiments_subparsers, parent_parser):
     )
     experiments_diff_parser.add_argument(
         "--json",
-        "--show-json",
         action="store_true",
         default=False,
         help="Show output in JSON format.",
     )
     experiments_diff_parser.add_argument(
         "--md",
-        "--show-md",
         action="store_true",
         default=False,
         dest="markdown",

dvc/commands/experiments/exec_run.py

@@ -9,10 +9,7 @@ class CmdExecutorRun(CmdBaseNoRepo):
     """Run an experiment executor."""
 
     def run(self):
-        from dvc.repo.experiments.executor.base import (
-            BaseExecutor,
-            ExecutorInfo,
-        )
+        from dvc.repo.experiments.executor.base import BaseExecutor, ExecutorInfo
         from dvc.utils.serialize import load_json
 
         info = ExecutorInfo.from_dict(load_json(self.args.infofile))
@@ -22,6 +19,8 @@ class CmdExecutorRun(CmdBaseNoRepo):
             queue=None,
             log_level=logger.getEffectiveLevel(),
             infofile=self.args.infofile,
+            copy_paths=self.args.copy_paths,
+            message=self.args.message,
         )
         return 0
 
@@ -39,4 +38,21 @@ def add_parser(experiments_subparsers, parent_parser):
         help="Path to executor info file",
         default=None,
     )
+    exec_run_parser.add_argument(
+        "-C",
+        "--copy-paths",
+        action="append",
+        default=[],
+        help=(
+            "List of ignored or untracked paths to copy into the temp directory."
+            " Only used if `--temp` or `--queue` is specified."
+        ),
+    )
+    exec_run_parser.add_argument(
+        "-M",
+        "--message",
+        type=str,
+        default=None,
+        help="Custom commit message to use when committing the experiment.",
+    )
     exec_run_parser.set_defaults(func=CmdExecutorRun)

dvc/commands/experiments/gc.py

@@ -1,150 +0,0 @@
-import argparse
-import logging
-
-from dvc.cli.command import CmdBase
-from dvc.cli.utils import append_doc_link
-from dvc.exceptions import InvalidArgumentError
-from dvc.ui import ui
-
-logger = logging.getLogger(__name__)
-
-
-def _raise_error_if_all_disabled(**kwargs):
-    if not any(kwargs.values()):
-        raise InvalidArgumentError(
-            "Either of `-w|--workspace`, `-a|--all-branches`, `-T|--all-tags`,"
-            " `--all-commits` or `--date` needs to be set."
-        )
-
-
-class CmdExperimentsGC(CmdBase):
-    def run(self):
-        _raise_error_if_all_disabled(
-            all_branches=self.args.all_branches,
-            all_tags=self.args.all_tags,
-            all_commits=self.args.all_commits,
-            commit_date=self.args.commit_date,
-            workspace=self.args.workspace,
-        )
-
-        msg = "This will remove all experiments except those derived from "
-
-        msg += "the workspace"
-        if self.args.all_commits:
-            msg += " and all git commits"
-        else:
-            if self.args.all_branches and self.args.all_tags:
-                msg += " and all git branches and tags"
-            elif self.args.all_branches:
-                msg += " and all git branches"
-            elif self.args.all_tags:
-                msg += " and all git tags"
-
-            if self.args.commit_date:
-                msg += (
-                    " and all git commits before date "
-                    f"{self.args.commit_date}"
-                )
-        msg += " of the current repo."
-
-        if self.args.queued:
-            msg += " Run queued experiments will be preserved."
-        else:
-            msg += " Run queued experiments will be removed."
-
-        logger.warning(msg)
-
-        msg = "Are you sure you want to proceed?"
-        if not self.args.force and not ui.confirm(msg):
-            return 1
-
-        removed = self.repo.experiments.gc(
-            all_branches=self.args.all_branches,
-            all_tags=self.args.all_tags,
-            all_commits=self.args.all_commits,
-            workspace=self.args.workspace,
-            commit_date=self.args.commit_date,
-            queued=self.args.queued,
-        )
-
-        if removed:
-            ui.write(
-                f"Removed {removed} experiments.",
-                "To remove unused cache files",
-                "use 'dvc gc'.",
-            )
-        else:
-            ui.write("No experiments to remove.")
-        return 0
-
-
-def add_parser(experiments_subparsers, parent_parser):
-
-    EXPERIMENTS_GC_HELP = "Garbage collect unneeded experiments."
-    EXPERIMENTS_GC_DESCRIPTION = (
-        "Removes all experiments which are not derived from the specified"
-        "Git revisions."
-    )
-    experiments_gc_parser = experiments_subparsers.add_parser(
-        "gc",
-        parents=[parent_parser],
-        description=append_doc_link(EXPERIMENTS_GC_DESCRIPTION, "exp/gc"),
-        help=EXPERIMENTS_GC_HELP,
-        formatter_class=argparse.RawDescriptionHelpFormatter,
-    )
-    experiments_gc_parser.add_argument(
-        "-w",
-        "--workspace",
-        action="store_true",
-        default=False,
-        help="Keep experiments derived from the current workspace.",
-    )
-    experiments_gc_parser.add_argument(
-        "-a",
-        "--all-branches",
-        action="store_true",
-        default=False,
-        help="Keep experiments derived from the tips of all Git branches.",
-    )
-    experiments_gc_parser.add_argument(
-        "-T",
-        "--all-tags",
-        action="store_true",
-        default=False,
-        help="Keep experiments derived from all Git tags.",
-    )
-    experiments_gc_parser.add_argument(
-        "-A",
-        "--all-commits",
-        action="store_true",
-        default=False,
-        help="Keep experiments derived from all Git commits.",
-    )
-    experiments_gc_parser.add_argument(
-        "--date",
-        type=str,
-        dest="commit_date",
-        metavar="<YYYY-MM-DD>",
-        default=None,
-        help=(
-            "Keep experiments from the commits after (inclusive) a certain "
-            "date. Date must match the extended ISO 8601 format (YYYY-MM-DD)."
-        ),
-    )
-    experiments_gc_parser.add_argument(
-        "--queued",
-        action="store_true",
-        default=False,
-        help=(
-            "Keep queued experiments (experiments run queue will be cleared "
-            "by default)."
-        ),
-    )
-    experiments_gc_parser.add_argument(
-        "-f",
-        "--force",
-        action="store_true",
-        default=False,
-        help="Force garbage collection - automatically agree to all prompts.",
-    )
-    experiments_gc_parser.set_defaults(func=CmdExperimentsGC)

dvc/commands/experiments/init.py

@@ -1,210 +0,0 @@
-import argparse
-import logging
-from typing import TYPE_CHECKING, List
-
-from funcy import compact
-
-from dvc.cli.command import CmdBase
-from dvc.cli.utils import append_doc_link
-from dvc.exceptions import InvalidArgumentError
-from dvc.ui import ui
-
-if TYPE_CHECKING:
-    from dvc.dependency import Dependency
-    from dvc.stage import PipelineStage
-
-
-logger = logging.getLogger(__name__)
-
-
-class CmdExperimentsInit(CmdBase):
-    DEFAULT_NAME = "train"
-    CODE = "src"
-    DATA = "data"
-    MODELS = "models"
-    DEFAULT_METRICS = "metrics.json"
-    DEFAULT_PARAMS = "params.yaml"
-    PLOTS = "plots"
-    DEFAULTS = {
-        "code": CODE,
-        "data": DATA,
-        "models": MODELS,
-        "metrics": DEFAULT_METRICS,
-        "params": DEFAULT_PARAMS,
-        "plots": PLOTS,
-    }
-
-    def run(self):
-        from dvc.commands.stage import parse_cmd
-
-        cmd = parse_cmd(self.args.command)
-        if not self.args.interactive and not cmd:
-            raise InvalidArgumentError("command is not specified")
-
-        from dvc.repo.experiments.init import init
-
-        defaults = {}
-        if not self.args.explicit:
-            config = self.repo.config["exp"]
-            defaults.update({**self.DEFAULTS, **config})
-
-        cli_args = compact(
-            {
-                "cmd": cmd,
-                "code": self.args.code,
-                "data": self.args.data,
-                "models": self.args.models,
-                "metrics": self.args.metrics,
-                "params": self.args.params,
-                "plots": self.args.plots,
-                "live": self.args.live,
-            }
-        )
-
-        initialized_stage, initialized_deps, initialized_out_dirs = init(
-            self.repo,
-            name=self.args.name,
-            type=self.args.type,
-            defaults=defaults,
-            overrides=cli_args,
-            interactive=self.args.interactive,
-            force=self.args.force,
-        )
-        self._post_init_display(
-            initialized_stage, initialized_deps, initialized_out_dirs
-        )
-        if self.args.run:
-            self.repo.experiments.run(targets=[initialized_stage.addressing])
-        return 0
-
-    def _post_init_display(
-        self,
-        stage: "PipelineStage",
-        new_deps: List["Dependency"],
-        new_out_dirs: List[str],
-    ) -> None:
-        from dvc.utils import humanize
-
-        path_fmt = "[green]{}[/green]".format
-        if new_deps:
-            deps_paths = humanize.join(map(path_fmt, new_deps))
-            ui.write(f"Creating dependencies: {deps_paths}", styled=True)
-
-        if new_out_dirs:
-            out_dirs_paths = humanize.join(map(path_fmt, new_out_dirs))
-            ui.write(
-                f"Creating output directories: {out_dirs_paths}", styled=True
-            )
-
-        ui.write(
-            f"Creating [b]{self.args.name}[/b] stage in [green]dvc.yaml[/]",
-            styled=True,
-        )
-        if stage.outs or not self.args.run:
-            # separate the above status-like messages with help/tips section
-            ui.write(styled=True)
-
-        if stage.outs:
-            outs_paths = humanize.join(map(path_fmt, stage.outs))
-            tips = f"Ensure your experiment command creates {outs_paths}."
-            ui.write(tips, styled=True)
-
-        if not self.args.run:
-            ui.write(
-                'You can now run your experiment using [b]"dvc exp run"[/].',
-                styled=True,
-            )
-        else:
-            # separate between `exp.run` output and `dvc exp init` output
-            ui.write(styled=True)
-
-
-def add_parser(experiments_subparsers, parent_parser):
-
-    EXPERIMENTS_INIT_HELP = "Quickly setup any project to use experiments."
-    experiments_init_parser = experiments_subparsers.add_parser(
-        "init",
-        parents=[parent_parser],
-        description=append_doc_link(EXPERIMENTS_INIT_HELP, "exp/init"),
-        formatter_class=argparse.RawDescriptionHelpFormatter,
-        help=EXPERIMENTS_INIT_HELP,
-    )
-    experiments_init_parser.add_argument(
-        "command",
-        nargs=argparse.REMAINDER,
-        help="Command to execute.",
-        metavar="command",
-    )
-    experiments_init_parser.add_argument(
-        "--run",
-        action="store_true",
-        help="Run the experiment after initializing it",
-    )
-    experiments_init_parser.add_argument(
-        "--interactive",
-        "-i",
-        action="store_true",
-        help="Prompt for values that are not provided",
-    )
-    experiments_init_parser.add_argument(
-        "-f",
-        "--force",
-        action="store_true",
-        default=False,
-        help="Overwrite existing stage",
-    )
-    experiments_init_parser.add_argument(
-        "--explicit",
-        action="store_true",
-        default=False,
-        help="Only use the path values explicitly provided",
-    )
-    experiments_init_parser.add_argument(
-        "--name",
-        "-n",
-        help="Name of the stage to create (default: %(default)s)",
-        default=CmdExperimentsInit.DEFAULT_NAME,
-    )
-    experiments_init_parser.add_argument(
-        "--code",
-        help="Path to the source file or directory "
-        "which your experiments depend"
-        f" (default: {CmdExperimentsInit.CODE})",
-    )
-    experiments_init_parser.add_argument(
-        "--data",
-        help="Path to the data file or directory "
-        "which your experiments depend"
-        f" (default: {CmdExperimentsInit.DATA})",
-    )
-    experiments_init_parser.add_argument(
-        "--models",
-        help="Path to the model file or directory for your experiments"
-        f" (default: {CmdExperimentsInit.MODELS})",
-    )
-    experiments_init_parser.add_argument(
-        "--params",
-        help="Path to the parameters file for your experiments"
-        f" (default: {CmdExperimentsInit.DEFAULT_PARAMS})",
-    )
-    experiments_init_parser.add_argument(
-        "--metrics",
-        help="Path to the metrics file for your experiments"
-        f" (default: {CmdExperimentsInit.DEFAULT_METRICS})",
-    )
-    experiments_init_parser.add_argument(
-        "--plots",
-        help="Path to the plots file or directory for your experiments"
-        f" (default: {CmdExperimentsInit.PLOTS})",
-    )
-    experiments_init_parser.add_argument(
-        "--live",
-        help="Path to log dvclive outputs for your experiments",
-    )
-    experiments_init_parser.add_argument(
-        "--type",
-        choices=["default", "checkpoint"],
-        default="default",
-        help="Select type of stage to create (default: %(default)s)",
-    )
-    experiments_init_parser.set_defaults(func=CmdExperimentsInit)

dvc/commands/experiments/ls.py

@@ -3,6 +3,7 @@ import logging
 
 from dvc.cli.command import CmdBase
 from dvc.cli.utils import append_doc_link
+from dvc.exceptions import InvalidArgumentError
 from dvc.ui import ui
 
 logger = logging.getLogger(__name__)
@@ -11,19 +12,36 @@ logger = logging.getLogger(__name__)
 class CmdExperimentsList(CmdBase):
     def run(self):
         name_only = self.args.name_only
+        sha_only = self.args.sha_only
+        git_remote = self.args.git_remote
+        if sha_only and git_remote:
+            raise InvalidArgumentError("--sha-only not supported with git_remote.")
         exps = self.repo.experiments.ls(
             all_commits=self.args.all_commits,
             rev=self.args.rev,
             num=self.args.num,
-            git_remote=self.args.git_remote,
+            git_remote=git_remote,
         )
 
         for baseline in exps:
-            if not name_only:
-                ui.write(f"{baseline}:")
-            for exp_name in exps[baseline]:
-                indent = "" if name_only else "\t"
-                ui.write(f"{indent}{exp_name}")
+            if not (name_only or sha_only):
+                tag_base = "refs/tags/"
+                branch_base = "refs/heads/"
+                name = baseline[:7]
+                if baseline.startswith(tag_base):
+                    name = baseline[len(tag_base) :]
+                elif baseline.startswith(branch_base):
+                    name = baseline[len(branch_base) :]
+                ui.write(f"{name}:")
+            for exp_name, rev in exps[baseline]:
+                if name_only:
+                    ui.write(exp_name)
+                elif sha_only:
+                    ui.write(rev)
+                elif rev:
+                    ui.write(f"\t{rev[:7]} [{exp_name}]")
+                else:
+                    ui.write(f"\t{exp_name}")
 
         return 0
 
@@ -40,11 +58,18 @@ def add_parser(experiments_subparsers, parent_parser):
         formatter_class=argparse.RawDescriptionHelpFormatter,
     )
     add_rev_selection_flags(experiments_list_parser, "List")
-    experiments_list_parser.add_argument(
+    display_group = experiments_list_parser.add_mutually_exclusive_group()
+    display_group.add_argument(
         "--name-only",
         "--names-only",
         action="store_true",
-        help="Only output experiment names (without parent commits).",
+        help="Only output experiment names (without SHAs or parent commits).",
+    )
+    display_group.add_argument(
+        "--sha-only",
+        "--shas-only",
+        action="store_true",
+        help="Only output experiment commit SHAs (without names or parent commits).",
     )
     experiments_list_parser.add_argument(
         "git_remote",

dvc/commands/experiments/pull.py

@@ -3,25 +3,13 @@ import logging
 
 from dvc.cli.command import CmdBase
 from dvc.cli.utils import append_doc_link
-from dvc.exceptions import InvalidArgumentError
 from dvc.ui import ui
 
 logger = logging.getLogger(__name__)
 
 
 class CmdExperimentsPull(CmdBase):
-    def raise_error_if_all_disabled(self):
-        if not any(
-            [self.args.experiment, self.args.all_commits, self.args.rev]
-        ):
-            raise InvalidArgumentError(
-                "Either provide an `experiment` argument, or use the "
-                "`--rev` or `--all-commits` flag."
-            )
-
     def run(self):
-        self.raise_error_if_all_disabled()
-
         pulled_exps = self.repo.experiments.pull(
             self.args.git_remote,
             self.args.experiment,
@@ -63,21 +51,18 @@ def add_parser(experiments_subparsers, parent_parser):
         help=EXPERIMENTS_PULL_HELP,
         formatter_class=argparse.RawDescriptionHelpFormatter,
     )
-    add_rev_selection_flags(experiments_pull_parser, "Pull", False)
+    add_rev_selection_flags(experiments_pull_parser, "Pull", True)
     experiments_pull_parser.add_argument(
         "-f",
         "--force",
         action="store_true",
-        help="Replace local experiment already exists.",
+        help="Replace local experiment if it already exists.",
     )
     experiments_pull_parser.add_argument(
         "--no-cache",
         action="store_false",
         dest="pull_cache",
-        help=(
-            "Do not pull cached outputs for this experiment from DVC remote "
-            "storage."
-        ),
+        help="Do not pull cached outputs for this experiment from DVC remote storage.",
     )
     experiments_pull_parser.add_argument(
         "-r",
@@ -92,8 +77,7 @@ def add_parser(experiments_subparsers, parent_parser):
         type=int,
         metavar="<number>",
         help=(
-            "Number of jobs to run simultaneously when pulling from DVC "
-            "remote storage."
+            "Number of jobs to run simultaneously when pulling from DVC remote storage."
         ),
     )
     experiments_pull_parser.add_argument(

dvc/commands/experiments/push.py

@@ -1,54 +1,81 @@
 import argparse
 import logging
+from typing import Any, Dict
 
 from dvc.cli import completion
 from dvc.cli.command import CmdBase
 from dvc.cli.utils import append_doc_link
-from dvc.exceptions import InvalidArgumentError
 from dvc.ui import ui
 
 logger = logging.getLogger(__name__)
 
 
 class CmdExperimentsPush(CmdBase):
-    def raise_error_if_all_disabled(self):
-        if not any(
-            [self.args.experiment, self.args.all_commits, self.args.rev]
-        ):
-            raise InvalidArgumentError(
-                "Either provide an `experiment` argument, or use the "
-                "`--rev` or `--all-commits` flag."
+    @staticmethod
+    def log_result(result: Dict[str, Any], remote: str):
+        from dvc.utils import humanize
+
+        def join_exps(exps):
+            return humanize.join([f"[bold]{e}[/]" for e in exps])
+
+        if diverged_exps := result.get("diverged"):
+            exps = join_exps(diverged_exps)
+            ui.error_write(
+                f"[yellow]Local experiment {exps} has diverged "
+                "from remote experiment with the same name.\n"
+                "To override the remote experiment re-run with '--force'.",
+                styled=True,
+            )
+        if uptodate_exps := result.get("up_to_date"):
+            exps = join_exps(uptodate_exps)
+            verb = "are" if len(uptodate_exps) > 1 else "is"
+            ui.write(
+                f"Experiment {exps} {verb} up to date on Git remote {remote!r}.",
+                styled=True,
+            )
+        if pushed_exps := result.get("success"):
+            exps = join_exps(pushed_exps)
+            ui.write(f"Pushed experiment {exps} to Git remote {remote!r}.", styled=True)
+        if not uptodate_exps and not pushed_exps:
+            ui.write("No experiments to push.")
+
+        if uploaded := result.get("uploaded"):
+            stats = {"uploaded": uploaded}
+            ui.write(humanize.get_summary(stats.items()))
+
+        if project_url := result.get("url"):
+            ui.rich_print(
+                "View your experiments at", project_url, style="yellow", soft_wrap=True
             )
 
     def run(self):
+        from dvc.repo.experiments.push import UploadError
 
-        self.raise_error_if_all_disabled()
-
-        pushed_exps = self.repo.experiments.push(
-            self.args.git_remote,
-            self.args.experiment,
-            all_commits=self.args.all_commits,
-            rev=self.args.rev,
-            num=self.args.num,
-            force=self.args.force,
-            push_cache=self.args.push_cache,
-            dvc_remote=self.args.dvc_remote,
-            jobs=self.args.jobs,
-            run_cache=self.args.run_cache,
-        )
-
-        if pushed_exps:
-            ui.write(
-                f"Pushed experiment '{pushed_exps}'"
-                f"to Git remote '{self.args.git_remote}'."
+        try:
+            result = self.repo.experiments.push(
+                self.args.git_remote,
+                self.args.experiment,
+                all_commits=self.args.all_commits,
+                rev=self.args.rev,
+                num=self.args.num,
+                force=self.args.force,
+                push_cache=self.args.push_cache,
+                dvc_remote=self.args.dvc_remote,
+                jobs=self.args.jobs,
+                run_cache=self.args.run_cache,
             )
-        else:
-            ui.write("No experiments to push.")
+        except UploadError as e:
+            self.log_result(e.result, self.args.git_remote)
+            raise
+
+        self.log_result(result, self.args.git_remote)
         if not self.args.push_cache:
             ui.write(
                 "To push cached outputs",
-                "for this experiment to DVC remote storage,"
-                "re-run this command without '--no-cache'.",
+                (
+                    "for this experiment to DVC remote storage,"
+                    "re-run this command without '--no-cache'."
+                ),
             )
 
         return 0
@@ -65,7 +92,7 @@ def add_parser(experiments_subparsers, parent_parser):
         help=EXPERIMENTS_PUSH_HELP,
         formatter_class=argparse.RawDescriptionHelpFormatter,
     )
-    add_rev_selection_flags(experiments_push_parser, "Push", False)
+    add_rev_selection_flags(experiments_push_parser, "Push", True)
     experiments_push_parser.add_argument(
         "-f",
         "--force",
@@ -76,10 +103,7 @@ def add_parser(experiments_subparsers, parent_parser):
         "--no-cache",
         action="store_false",
         dest="push_cache",
-        help=(
-            "Do not push cached outputs for this experiment to DVC remote "
-            "storage."
-        ),
+        help="Do not push cached outputs for this experiment to DVC remote storage.",
     )
     experiments_push_parser.add_argument(
         "-r",
@@ -93,10 +117,7 @@ def add_parser(experiments_subparsers, parent_parser):
         "--jobs",
         type=int,
         metavar="<number>",
-        help=(
-            "Number of jobs to run simultaneously when pushing to DVC remote "
-            "storage."
-        ),
+        help="Number of jobs to run simultaneously when pushing to DVC remote storage.",
     )
     experiments_push_parser.add_argument(
         "--run-cache",

dvc/commands/experiments/queue_worker.py

@@ -9,7 +9,9 @@ class CmdQueueWorker(CmdBase):
     """Run the exp queue worker."""
 
     def run(self):
-        self.repo.experiments.celery_queue.worker.start(self.args.name)
+        self.repo.experiments.celery_queue.worker.start(
+            self.args.name, fsapp_clean=self.args.clean
+        )
         return 0
 
 
@@ -22,4 +24,9 @@ def add_parser(experiments_subparsers, parent_parser):
         add_help=False,
     )
     parser.add_argument("name", help="Celery worker name.")
+    parser.add_argument(
+        "--clean",
+        action="store_true",
+        help="Automatically cleanup celery broker on shutdown.",
+    )
     parser.set_defaults(func=CmdQueueWorker)

dvc/commands/experiments/remove.py

@@ -24,10 +24,11 @@ class CmdExperimentsRemove(CmdBase):
             )
 
     def run(self):
+        from dvc.utils import humanize
 
         self.check_arguments()
 
-        removed_list = self.repo.experiments.remove(
+        removed = self.repo.experiments.remove(
             exp_names=self.args.experiment,
             all_commits=self.args.all_commits,
             rev=self.args.rev,
@@ -35,8 +36,10 @@ class CmdExperimentsRemove(CmdBase):
             queue=self.args.queue,
             git_remote=self.args.git_remote,
         )
-        removed = ",".join(removed_list)
-        ui.write(f"Removed experiments: {removed}")
+        if removed:
+            ui.write(f"Removed experiments: {humanize.join(map(repr, removed))}")
+        else:
+            ui.write("No experiments to remove.")
 
         return 0
 

dvc/commands/experiments/run.py

@@ -1,57 +1,32 @@
 import argparse
 import logging
 
-from dvc.cli import completion
 from dvc.cli.utils import append_doc_link
 from dvc.commands.repro import CmdRepro
 from dvc.commands.repro import add_arguments as add_repro_arguments
-from dvc.exceptions import InvalidArgumentError
-from dvc.ui import ui
 
 logger = logging.getLogger(__name__)
 
 
 class CmdExperimentsRun(CmdRepro):
     def run(self):
-        from dvc.compare import show_metrics
-
-        if self.args.checkpoint_resume:
-            if self.args.reset:
-                raise InvalidArgumentError(
-                    "--reset and --rev are mutually exclusive."
-                )
-            if not (self.args.queue or self.args.tmp_dir):
-                raise InvalidArgumentError(
-                    "--rev can only be used in conjunction with "
-                    "--queue or --temp."
-                )
-
-        if self.args.reset:
-            ui.write("Any existing checkpoints will be reset and re-run.")
-
-        results = self.repo.experiments.run(
+        self.repo.experiments.run(
             name=self.args.name,
             queue=self.args.queue,
             run_all=self.args.run_all,
             jobs=self.args.jobs,
             params=self.args.set_param,
-            checkpoint_resume=self.args.checkpoint_resume,
-            reset=self.args.reset,
             tmp_dir=self.args.tmp_dir,
             machine=self.args.machine,
+            copy_paths=self.args.copy_paths,
+            message=self.args.message,
             **self._common_kwargs,
         )
 
-        if self.args.metrics and results:
-            metrics = self.repo.metrics.show(revs=list(results))
-            metrics.pop("workspace", None)
-            show_metrics(metrics)
-
         return 0
 
 
 def add_parser(experiments_subparsers, parent_parser):
-
     EXPERIMENTS_RUN_HELP = "Run or resume an experiment."
     experiments_run_parser = experiments_subparsers.add_parser(
         "run",
@@ -61,22 +36,6 @@ def add_parser(experiments_subparsers, parent_parser):
         formatter_class=argparse.RawDescriptionHelpFormatter,
     )
     _add_run_common(experiments_run_parser)
-    experiments_run_parser.add_argument(
-        "-r",
-        "--rev",
-        type=str,
-        dest="checkpoint_resume",
-        help=(
-            "Continue the specified checkpoint experiment. Can only be used "
-            "in conjunction with --queue or --temp."
-        ),
-        metavar="<experiment_rev>",
-    ).complete = completion.EXPERIMENT
-    experiments_run_parser.add_argument(
-        "--reset",
-        action="store_true",
-        help="Reset existing checkpoints and restart the experiment.",
-    )
     experiments_run_parser.set_defaults(func=CmdExperimentsRun)
 
 
@@ -140,3 +99,20 @@ def _add_run_common(parser):
         # )
         # metavar="<name>",
     )
+    parser.add_argument(
+        "-C",
+        "--copy-paths",
+        action="append",
+        default=[],
+        help=(
+            "List of ignored or untracked paths to copy into the temp directory."
+            " Only used if `--temp` or `--queue` is specified."
+        ),
+    )
+    parser.add_argument(
+        "-m",
+        "--message",
+        type=str,
+        default=None,
+        help="Custom commit message to use when committing the experiment.",
+    )

dvc/commands/experiments/save.py

@@ -11,12 +11,12 @@ logger = logging.getLogger(__name__)
 
 class CmdExperimentsSave(CmdBase):
     def run(self):
-
         try:
             ref = self.repo.experiments.save(
                 name=self.args.name,
                 force=self.args.force,
                 include_untracked=self.args.include_untracked,
+                message=self.args.message,
             )
         except DvcException:
             logger.exception("failed to save experiment")
@@ -36,7 +36,7 @@ class CmdExperimentsSave(CmdBase):
 
 
 def add_parser(experiments_subparsers, parent_parser):
-    EXPERIMENTS_SAVE_HELP = "Save current workspace as a dvc experiment."
+    EXPERIMENTS_SAVE_HELP = "Save current workspace as an experiment."
     save_parser = experiments_subparsers.add_parser(
         "save",
         parents=[parent_parser],
@@ -49,11 +49,10 @@ def add_parser(experiments_subparsers, parent_parser):
         "--force",
         action="store_true",
         default=False,
-        help="Save even if hash value for dependencies/outputs changed.",
+        help="Replace experiment if it already exists.",
     )
     save_parser.add_argument(
         "--json",
-        "--show-json",
         action="store_true",
         default=False,
         help="Show output in JSON format.",
@@ -76,4 +75,11 @@ def add_parser(experiments_subparsers, parent_parser):
         help="List of untracked paths to include in the experiment.",
         metavar="<path>",
     )
+    save_parser.add_argument(
+        "-M",
+        "--message",
+        type=str,
+        default=None,
+        help="Custom commit message to use when committing the experiment.",
+    )
     save_parser.set_defaults(func=CmdExperimentsSave)

dvc/commands/experiments/show.py

@@ -1,20 +1,16 @@
 import argparse
 import logging
-import os
 import re
-from collections import Counter, OrderedDict, defaultdict
 from datetime import date, datetime
-from typing import TYPE_CHECKING
+from typing import TYPE_CHECKING, Dict, Iterable
 
 from funcy import lmap
 
-from dvc.cli import completion
 from dvc.cli.command import CmdBase
 from dvc.cli.utils import append_doc_link
 from dvc.commands.metrics import DEFAULT_PRECISION
-from dvc.exceptions import DvcException, InvalidArgumentError
+from dvc.exceptions import DvcException
 from dvc.ui import ui
-from dvc.utils.flatten import flatten
 from dvc.utils.serialize import encode_exception
 
 if TYPE_CHECKING:
@@ -28,269 +24,13 @@ FILL_VALUE_ERRORED = "!"
 logger = logging.getLogger(__name__)
 
 
-def _update_names(names, items):
-    for name, item in items:
-        item = item.get("data", {})
-        if isinstance(item, dict):
-            item = flatten(item)
-            names[name].update({key: None for key in item})
-
-
-def _collect_names(all_experiments, **kwargs):
-    metric_names = defaultdict(dict)
-    param_names = defaultdict(dict)
-    deps_names = set()
-
-    for _, experiments in all_experiments.items():
-        for exp_data in experiments.values():
-            exp = exp_data.get("data", {})
-            _update_names(metric_names, exp.get("metrics", {}).items())
-            _update_names(param_names, exp.get("params", {}).items())
-            for dep_name in exp.get("deps", {}):
-                deps_names.add(dep_name)
-
-    return metric_names, param_names, sorted(deps_names)
-
-
 experiment_types = {
-    "checkpoint_tip": "│ ╓",
-    "checkpoint_commit": "│ ╟",
-    "checkpoint_base": "├─╨",
     "branch_commit": "├──",
     "branch_base": "└──",
     "baseline": "",
 }
 
 
-def _collect_rows(
-    base_rev,
-    experiments,
-    all_headers,
-    metric_headers,
-    param_headers,
-    metric_names,
-    param_names,
-    deps_names,
-    precision=DEFAULT_PRECISION,
-    sort_by=None,
-    sort_order=None,
-    fill_value=FILL_VALUE,
-    iso=False,
-):
-    from scmrepo.git import Git
-
-    if sort_by:
-        sort_path, sort_name, sort_type = _sort_column(
-            sort_by, metric_names, param_names
-        )
-        reverse = sort_order == "desc"
-        experiments = _sort_exp(
-            experiments, sort_path, sort_name, sort_type, reverse
-        )
-
-    new_checkpoint = True
-    for i, (rev, results) in enumerate(experiments.items()):
-        fill_value = FILL_VALUE_ERRORED if results.get("error") else fill_value
-        row_dict = {k: fill_value for k in all_headers}
-
-        exp = results.get("data", {})
-
-        state = exp.get("status")
-        if state == "Success":
-            state = fill_value
-
-        is_baseline = rev == "baseline"
-
-        if is_baseline:
-            name_rev = base_rev[:7] if Git.is_sha(base_rev) else base_rev
-        else:
-            name_rev = rev[:7]
-
-        tip = exp.get("checkpoint_tip")
-        parent_rev = exp.get("checkpoint_parent", "")
-        parent_exp = experiments.get(parent_rev, {}).get("data", {})
-        parent_tip = parent_exp.get("checkpoint_tip")
-
-        parent = ""
-        if is_baseline:
-            typ = "baseline"
-        elif tip:
-            if tip == parent_tip:
-                typ = (
-                    "checkpoint_tip" if new_checkpoint else "checkpoint_commit"
-                )
-            elif parent_rev == base_rev:
-                typ = "checkpoint_base"
-            else:
-                typ = "checkpoint_commit"
-                parent = parent_rev[:7]
-        elif i < len(experiments) - 1:
-            typ = "branch_commit"
-        else:
-            typ = "branch_base"
-
-        if not is_baseline:
-            new_checkpoint = not (tip and tip == parent_tip)
-
-        row_dict["Experiment"] = exp.get("name", "")
-        row_dict["rev"] = name_rev
-        row_dict["typ"] = typ
-        row_dict["Created"] = format_time(
-            exp.get("timestamp"), fill_value, iso
-        )
-        row_dict["parent"] = parent
-        row_dict["State"] = state
-        row_dict["Executor"] = exp.get("executor", fill_value)
-
-        _extend_row(
-            row_dict,
-            metric_names,
-            metric_headers,
-            exp.get("metrics", {}).items(),
-            precision,
-            fill_value=fill_value,
-        )
-        _extend_row(
-            row_dict,
-            param_names,
-            param_headers,
-            exp.get("params", {}).items(),
-            precision,
-            fill_value=fill_value,
-        )
-        for dep in deps_names:
-            hash_info = exp.get("deps", {}).get(dep, {}).get("hash")
-            if hash_info is not None:
-                hash_info = hash_info[:7]
-            row_dict[dep] = hash_info
-        yield list(row_dict.values())
-
-
-def _sort_column(sort_by, metric_names, param_names):
-    path, _, sort_name = sort_by.rpartition(":")
-    matches = set()
-
-    if path:
-        if path in metric_names and sort_name in metric_names[path]:
-            matches.add((path, sort_name, "metrics"))
-        if path in param_names and sort_name in param_names[path]:
-            matches.add((path, sort_name, "params"))
-    else:
-        for path in metric_names:
-            if sort_name in metric_names[path]:
-                matches.add((path, sort_name, "metrics"))
-        for path in param_names:
-            if sort_name in param_names[path]:
-                matches.add((path, sort_name, "params"))
-
-    if len(matches) == 1:
-        return matches.pop()
-    if len(matches) > 1:
-        raise InvalidArgumentError(
-            "Ambiguous sort column '{}' matched '{}'".format(
-                sort_by,
-                ", ".join([f"{path}:{name}" for path, name, _ in matches]),
-            )
-        )
-    raise InvalidArgumentError(f"Unknown sort column '{sort_by}'")
-
-
-def _sort_exp(experiments, sort_path, sort_name, typ, reverse):
-    def _sort(item):
-        rev, exp = item
-        exp_data = exp.get("data", {})
-        tip = exp_data.get("checkpoint_tip")
-        if tip and tip != rev:
-            # Sort checkpoint experiments by tip commit
-            return _sort((tip, experiments[tip]))
-        data = exp_data.get(typ, {}).get(sort_path, {}).get("data", {})
-        val = flatten(data).get(sort_name)
-        return val is None, val
-
-    ret = OrderedDict()
-    if "baseline" in experiments:
-        ret["baseline"] = experiments.pop("baseline")
-
-    ret.update(sorted(experiments.items(), key=_sort, reverse=reverse))
-    return ret
-
-
-def format_time(datetime_obj, fill_value=FILL_VALUE, iso=False):
-    if datetime_obj is None:
-        return fill_value
-
-    if iso:
-        return datetime_obj.isoformat()
-
-    if datetime_obj.date() == date.today():
-        fmt = "%I:%M %p"
-    else:
-        fmt = "%b %d, %Y"
-    return datetime_obj.strftime(fmt)
-
-
-def _extend_row(row, names, headers, items, precision, fill_value=FILL_VALUE):
-    from dvc.compare import _format_field, with_value
-
-    for fname, data in items:
-        item = data.get("data", {})
-        item = flatten(item) if isinstance(item, dict) else {fname: item}
-        for name in names[fname]:
-            value = with_value(
-                item.get(name),
-                FILL_VALUE_ERRORED if data.get("error", None) else fill_value,
-            )
-            # wrap field data in ui.rich_text, otherwise rich may
-            # interpret unescaped braces from list/dict types as rich
-            # markup tags
-            value = ui.rich_text(str(_format_field(value, precision)))
-            if name in headers:
-                row[name] = value
-            else:
-                row[f"{fname}:{name}"] = value
-
-
-def experiments_table(
-    all_experiments,
-    headers,
-    metric_headers,
-    metric_names,
-    param_headers,
-    param_names,
-    deps_names,
-    sort_by=None,
-    sort_order=None,
-    precision=DEFAULT_PRECISION,
-    fill_value=FILL_VALUE,
-    iso=False,
-) -> "TabularData":
-    from funcy import lconcat
-
-    from dvc.compare import TabularData
-
-    all_headers = lconcat(headers, metric_headers, param_headers, deps_names)
-    td = TabularData(all_headers, fill_value=fill_value)
-    for base_rev, experiments in all_experiments.items():
-        rows = _collect_rows(
-            base_rev,
-            experiments,
-            all_headers,
-            metric_headers,
-            param_headers,
-            metric_names,
-            param_names,
-            deps_names,
-            sort_by=sort_by,
-            sort_order=sort_order,
-            precision=precision,
-            fill_value=fill_value,
-            iso=iso,
-        )
-        td.extend(rows)
-
-    return td
-
-
 def prepare_exp_id(kwargs) -> "RichText":
     exp_name = kwargs["Experiment"]
     rev = kwargs["rev"]
@@ -314,52 +54,18 @@ def baseline_styler(typ):
     return {"style": "bold"} if typ == "baseline" else {}
 
 
-def show_experiments(
-    all_experiments,
+def show_experiments(  # noqa: C901
+    td: "TabularData",
+    headers: Dict[str, Iterable[str]],
     keep=None,
     drop=None,
     pager=True,
     csv=False,
     markdown=False,
-    pcp=False,
     **kwargs,
 ):
-    from funcy.seqs import flatten as flatten_list
-
-    metric_names, param_names, deps_names = _collect_names(all_experiments)
-
-    headers = [
-        "Experiment",
-        "rev",
-        "typ",
-        "Created",
-        "parent",
-        "State",
-        "Executor",
-    ]
-
-    names = {**metric_names, **param_names}
-    counter = Counter(flatten_list([list(a.keys()) for a in names.values()]))
-    counter.update(headers)
-    metric_headers = _normalize_headers(metric_names, counter)
-    param_headers = _normalize_headers(param_names, counter)
-
-    td = experiments_table(
-        all_experiments,
-        headers,
-        metric_headers,
-        metric_names,
-        param_headers,
-        param_names,
-        deps_names,
-        kwargs.get("sort_by"),
-        kwargs.get("sort_order"),
-        kwargs.get("precision"),
-        kwargs.get("fill_value"),
-        kwargs.get("iso"),
-    )
     if keep:
-        for col in td.keys():
+        for col in td.keys():  # noqa: SIM118
             if re.match(keep, col):
                 td.protect(col)
 
@@ -371,16 +77,9 @@ def show_experiments(
 
     if not csv:
         merge_headers = ["Experiment", "rev", "typ", "parent"]
-        td.column("Experiment")[:] = map(
-            prepare_exp_id, td.as_dict(merge_headers)
-        )
+        td.column("Experiment")[:] = map(prepare_exp_id, td.as_dict(merge_headers))
         td.drop(*merge_headers[1:])
 
-    headers = {
-        "metrics": metric_headers,
-        "params": param_headers,
-        "deps": deps_names,
-    }
     styles = {
         "Experiment": {"no_wrap": True, "header_style": "black on grey93"},
         "Created": {"header_style": "black on grey93"},
@@ -405,51 +104,23 @@ def show_experiments(
         }
     )
 
-    if kwargs.get("only_changed", False) or pcp:
+    if kwargs.get("only_changed", False):
         td.drop_duplicates("cols", ignore_empty=False)
 
     cols_to_drop = set()
     if drop is not None:
-        cols_to_drop = {col for col in td.keys() if re.match(drop, col)}
-    if pcp:
-        cols_to_drop.add("Created")
+        cols_to_drop = {col for col in td.keys() if re.match(drop, col)}  # noqa: SIM118
     td.drop(*cols_to_drop)
 
-    if pcp:
-        subset = {x for x in td.keys() if x != "Experiment"}
-        td.dropna(
-            "rows",
-            how="all",
-            subset=subset,
-        )
-        td.drop_duplicates("rows", subset=subset)
-        if "Experiment" in td:
-            td.column("Experiment")[:] = [
-                # remove tree characters
-                str(x).encode("ascii", "ignore").strip().decode()
-                for x in td.column("Experiment")
-            ]
-        out = kwargs.get("out") or "dvc_plots"
-        output_file = os.path.join(out, "index.html")
-        ui.write(
-            td.to_parallel_coordinates(
-                output_path=os.path.abspath(output_file),
-                color_by=kwargs.get("sort_by") or "Experiment",
-            )
-        )
-        if kwargs.get("open"):
-            return ui.open_browser(output_file)
-
-    else:
-        td.render(
-            pager=pager,
-            borders="horizontals",
-            rich_table=True,
-            header_styles=styles,
-            row_styles=row_styles,
-            csv=csv,
-            markdown=markdown,
-        )
+    td.render(
+        pager=pager,
+        borders="horizontals",
+        rich_table=True,
+        header_styles=styles,
+        row_styles=row_styles,
+        csv=csv,
+        markdown=markdown,
+    )
 
 
 def _normalize_headers(names, count):
@@ -468,8 +139,10 @@ def _format_json(item):
 
 class CmdExperimentsShow(CmdBase):
     def run(self):
+        from dvc.repo.experiments.show import tabulate
+
         try:
-            all_experiments = self.repo.experiments.show(
+            exps = self.repo.experiments.show(
                 all_branches=self.args.all_branches,
                 all_tags=self.args.all_tags,
                 all_commits=self.args.all_commits,
@@ -480,38 +153,40 @@ class CmdExperimentsShow(CmdBase):
                 sha_only=self.args.sha,
                 param_deps=self.args.param_deps,
                 fetch_running=self.args.fetch_running,
+                force=self.args.force,
             )
         except DvcException:
             logger.exception("failed to show experiments")
             return 1
 
         if self.args.json:
-            ui.write_json(all_experiments, default=_format_json)
+            ui.write_json([exp.dumpd() for exp in exps], default=_format_json)
         else:
             precision = (
-                self.args.precision or None
-                if self.args.csv
-                else DEFAULT_PRECISION
+                self.args.precision or None if self.args.csv else DEFAULT_PRECISION
             )
             fill_value = "" if self.args.csv else FILL_VALUE
-            iso = True if self.args.csv else False
+            iso = self.args.csv
+            td, headers = tabulate(
+                exps,
+                precision=precision,
+                fill_value=fill_value,
+                iso=iso,
+                sort_by=self.args.sort_by,
+                sort_order=self.args.sort_order,
+            )
 
             show_experiments(
-                all_experiments,
+                td,
+                headers,
                 keep=self.args.keep,
                 drop=self.args.drop,
                 sort_by=self.args.sort_by,
                 sort_order=self.args.sort_order,
-                precision=precision,
-                fill_value=fill_value,
-                iso=iso,
                 pager=not self.args.no_pager,
                 csv=self.args.csv,
                 markdown=self.args.markdown,
                 only_changed=self.args.only_changed,
-                pcp=self.args.pcp,
-                out=self.args.out,
-                open=self.args.open,
             )
         return 0
 
@@ -580,10 +255,7 @@ def add_parser(experiments_subparsers, parent_parser):
     )
     experiments_show_parser.add_argument(
         "--sort-order",
-        help=(
-            "Sort order to use with --sort-by."
-            " Defaults to ascending ('asc')."
-        ),
+        help="Sort order to use with --sort-by. Defaults to ascending ('asc').",
         choices=("asc", "desc"),
         default="asc",
     )
@@ -607,21 +279,18 @@ def add_parser(experiments_subparsers, parent_parser):
     )
     experiments_show_parser.add_argument(
         "--json",
-        "--show-json",
         action="store_true",
         default=False,
         help="Print output in JSON format instead of a human-readable table.",
     )
     experiments_show_parser.add_argument(
         "--csv",
-        "--show-csv",
         action="store_true",
         default=False,
         help="Print output in csv format instead of a human-readable table.",
     )
     experiments_show_parser.add_argument(
         "--md",
-        "--show-md",
         action="store_true",
         default=False,
         dest="markdown",
@@ -636,31 +305,16 @@ def add_parser(experiments_subparsers, parent_parser):
         ),
         metavar="<n>",
     )
-    experiments_show_parser.add_argument(
-        "--parallel-coordinates-plot",
-        "--pcp",
-        dest="pcp",
-        action="store_true",
-        default=False,
-        help="Generate a Parallel Coordinates Plot from the tabulated output.",
-    )
-    experiments_show_parser.add_argument(
-        "-o",
-        "--out",
-        default=None,
-        help="Destination folder to save the Parallel Coordinates Plot to",
-        metavar="<path>",
-    ).complete = completion.DIR
-    experiments_show_parser.add_argument(
-        "--open",
-        action="store_true",
-        default=False,
-        help="Open the Parallel Coordinates Plot directly in the browser.",
-    )
     experiments_show_parser.add_argument(
         "--no-fetch",
         dest="fetch_running",
         action="store_false",
         help=argparse.SUPPRESS,
     )
+    experiments_show_parser.add_argument(
+        "-f",
+        "--force",
+        action="store_true",
+        help="Force re-collection of experiments instead of loading from exp cache.",
+    )
     experiments_show_parser.set_defaults(func=CmdExperimentsShow)

dvc/commands/gc.py

@@ -10,7 +10,7 @@ logger = logging.getLogger(__name__)
 
 
 class CmdGC(CmdBase):
-    def run(self):
+    def run(self):  # noqa: C901, PLR0912
         from dvc.repo.gc import _validate_args
 
         _validate_args(
@@ -22,6 +22,8 @@ class CmdGC(CmdBase):
             workspace=self.args.workspace,
             rev=self.args.rev,
             num=self.args.num,
+            cloud=self.args.cloud,
+            not_in_remote=self.args.not_in_remote,
         )
 
         if self.args.rev:
@@ -40,17 +42,16 @@ class CmdGC(CmdBase):
             elif self.args.all_tags:
                 msg += " and all git tags"
             if self.args.commit_date:
-                msg += (
-                    " and all git commits before date "
-                    f"{self.args.commit_date}"
-                )
+                msg += f" and all git commits before date {self.args.commit_date}"
             if self.args.rev:
-                msg += (
-                    f" and last {self.args.num} commits from {self.args.rev}"
-                )
+                msg += f" and last {self.args.num} commits from {self.args.rev}"
 
         if self.args.all_experiments:
             msg += " and all experiments"
+
+        if self.args.not_in_remote:
+            msg += " that are present in the DVC remote"
+
         if self.args.repos:
             msg += " of the current and the following repos:"
 
@@ -79,6 +80,7 @@ class CmdGC(CmdBase):
             workspace=self.args.workspace,
             rev=self.args.rev,
             num=self.args.num,
+            not_in_remote=self.args.not_in_remote,
         )
         return 0
 
@@ -162,12 +164,18 @@ def add_parser(subparsers, parent_parser):
         default=False,
         help="Keep data files for all experiments.",
     )
+    gc_parser.add_argument(
+        "--not-in-remote",
+        action="store_true",
+        default=False,
+        help="Keep data files that are not present in the remote.",
+    )
     gc_parser.add_argument(
         "-c",
         "--cloud",
         action="store_true",
         default=False,
-        help="Collect garbage in remote repository.",
+        help="Collect garbage in remote storage in addition to local cache.",
     )
     gc_parser.add_argument(
         "-r",
@@ -198,9 +206,11 @@ def add_parser(subparsers, parent_parser):
         dest="repos",
         type=str,
         nargs="*",
-        help="Keep data files required by these projects "
-        "in addition to the current one. "
-        "Useful if you share a single cache across repos.",
+        help=(
+            "Keep data files required by these projects "
+            "in addition to the current one. "
+            "Useful if you share a single cache across repos."
+        ),
         metavar="<paths>",
     )
     gc_parser.set_defaults(func=CmdGC)

dvc/commands/get.py

@@ -3,10 +3,9 @@ import logging
 
 from dvc.cli import completion
 from dvc.cli.command import CmdBaseNoRepo
+from dvc.cli.utils import DictAction, append_doc_link
 from dvc.exceptions import DvcException
 
-from ..cli.utils import append_doc_link
-
 logger = logging.getLogger(__name__)
 
 
@@ -15,14 +14,8 @@ class CmdGet(CmdBaseNoRepo):
         from dvc.api import get_url
         from dvc.ui import ui
 
-        try:
-            url = get_url(
-                self.args.path, repo=self.args.url, rev=self.args.rev
-            )
-            ui.write(url, force=True)
-        except DvcException:
-            logger.exception("failed to show URL")
-            return 1
+        url = get_url(self.args.path, repo=self.args.url, rev=self.args.rev)
+        ui.write(url, force=True)
 
         return 0
 
@@ -34,6 +27,7 @@ class CmdGet(CmdBaseNoRepo):
 
     def _get_file_from_repo(self):
         from dvc.repo import Repo
+        from dvc.scm import CloneError
 
         try:
             Repo.get(
@@ -42,13 +36,18 @@ class CmdGet(CmdBaseNoRepo):
                 out=self.args.out,
                 rev=self.args.rev,
                 jobs=self.args.jobs,
+                force=self.args.force,
+                config=self.args.config,
+                remote=self.args.remote,
+                remote_config=self.args.remote_config,
             )
             return 0
+        except CloneError:
+            logger.exception("failed to get '%s'", self.args.path)
+            return 1
         except DvcException:
             logger.exception(
-                "failed to get '{}' from '{}'".format(
-                    self.args.path, self.args.url
-                )
+                "failed to get '%s' from '%s'", self.args.path, self.args.url
             )
             return 1
 
@@ -84,8 +83,10 @@ def add_parser(subparsers, parent_parser):
     get_parser.add_argument(
         "--show-url",
         action="store_true",
-        help="Print the storage location (URL) the target data would be "
-        "downloaded from, and exit.",
+        help=(
+            "Print the storage location (URL) the target data would be "
+            "downloaded from, and exit."
+        ),
     )
     get_parser.add_argument(
         "-j",
@@ -97,4 +98,34 @@ def add_parser(subparsers, parent_parser):
         ),
         metavar="<number>",
     )
+    get_parser.add_argument(
+        "-f",
+        "--force",
+        action="store_true",
+        default=False,
+        help="Override local file or folder if exists.",
+    )
+    get_parser.add_argument(
+        "--config",
+        type=str,
+        help=(
+            "Path to a config file that will be merged with the config "
+            "in the target repository."
+        ),
+    )
+    get_parser.add_argument(
+        "--remote",
+        type=str,
+        help="Remote name to set as a default in the target repository.",
+    )
+    get_parser.add_argument(
+        "--remote-config",
+        type=str,
+        nargs="*",
+        action=DictAction,
+        help=(
+            "Remote config options to merge with a remote's config (default or one "
+            "specified by '--remote') in the target repository."
+        ),
+    )
     get_parser.set_defaults(func=CmdGet)

dvc/commands/get_url.py

@@ -3,10 +3,9 @@ import logging
 
 from dvc.cli import completion
 from dvc.cli.command import CmdBaseNoRepo
+from dvc.cli.utils import append_doc_link
 from dvc.exceptions import DvcException
 
-from ..cli.utils import append_doc_link
-
 logger = logging.getLogger(__name__)
 
 
@@ -15,7 +14,12 @@ class CmdGetUrl(CmdBaseNoRepo):
         from dvc.repo import Repo
 
         try:
-            Repo.get_url(self.args.url, out=self.args.out, jobs=self.args.jobs)
+            Repo.get_url(
+                self.args.url,
+                out=self.args.out,
+                jobs=self.args.jobs,
+                force=self.args.force,
+            )
             return 0
         except DvcException:
             logger.exception("failed to get '%s'", self.args.url)
@@ -47,4 +51,11 @@ def add_parser(subparsers, parent_parser):
         ),
         metavar="<number>",
     )
+    get_parser.add_argument(
+        "-f",
+        "--force",
+        action="store_true",
+        default=False,
+        help="Override local file or folder if exists.",
+    )
     get_parser.set_defaults(func=CmdGetUrl)

dvc/commands/git_hook.py

@@ -64,15 +64,15 @@ class CmdPrePush(CmdHookBase):
 
 class CmdMergeDriver(CmdHookBase):
     def _run(self):
-        from dvc.dvcfile import Dvcfile
+        from dvc.dvcfile import load_file
         from dvc.repo import Repo
 
         dvc = Repo()
 
         try:
-            ancestor = Dvcfile(dvc, self.args.ancestor, verify=False)
-            our = Dvcfile(dvc, self.args.our, verify=False)
-            their = Dvcfile(dvc, self.args.their, verify=False)
+            ancestor = load_file(dvc, self.args.ancestor, verify=False)
+            our = load_file(dvc, self.args.our, verify=False)
+            their = load_file(dvc, self.args.their, verify=False)
 
             our.merge(ancestor, their, allowed=["add", "remove", "change"])
 

dvc/commands/imp.py

@@ -3,7 +3,7 @@ import logging
 
 from dvc.cli import completion
 from dvc.cli.command import CmdBase
-from dvc.cli.utils import append_doc_link
+from dvc.cli.utils import DictAction, append_doc_link
 from dvc.exceptions import DvcException
 
 logger = logging.getLogger(__name__)
@@ -11,34 +11,35 @@ logger = logging.getLogger(__name__)
 
 class CmdImport(CmdBase):
     def run(self):
+        from dvc.scm import CloneError
+
         try:
             self.repo.imp(
                 self.args.url,
                 self.args.path,
                 out=self.args.out,
-                fname=self.args.file,
                 rev=self.args.rev,
                 no_exec=self.args.no_exec,
                 no_download=self.args.no_download,
-                desc=self.args.desc,
-                type=self.args.type,
-                labels=self.args.labels,
-                meta=self.args.meta,
                 jobs=self.args.jobs,
+                config=self.args.config,
+                remote=self.args.remote,
+                remote_config=self.args.remote_config,
             )
+        except CloneError:
+            logger.exception("failed to import '%s'", self.args.path)
+            return 1
         except DvcException:
             logger.exception(
-                "failed to import '{}' from '{}'.".format(
-                    self.args.path, self.args.url
-                )
+                "failed to import '%s' from '%s'.",
+                self.args.path,
+                self.args.url,
             )
             return 1
         return 0
 
 
 def add_parser(subparsers, parent_parser):
-    from .add import _add_annotating_args
-
     IMPORT_HELP = (
         "Download file or directory tracked by DVC or by Git "
         "into the workspace, and track it."
@@ -70,11 +71,6 @@ def add_parser(subparsers, parent_parser):
         help="Git revision (e.g. SHA, branch, tag)",
         metavar="<commit>",
     )
-    import_parser.add_argument(
-        "--file",
-        help="Specify name of the .dvc file this command will generate.",
-        metavar="<filename>",
-    )
     no_download_exec_group = import_parser.add_mutually_exclusive_group()
     no_download_exec_group.add_argument(
         "--no-exec",
@@ -86,8 +82,10 @@ def add_parser(subparsers, parent_parser):
         "--no-download",
         action="store_true",
         default=False,
-        help="Create .dvc file including target data hash value(s)"
-        " but do not actually download the file(s).",
+        help=(
+            "Create .dvc file including target data hash value(s)"
+            " but do not actually download the file(s)."
+        ),
     )
     import_parser.add_argument(
         "-j",
@@ -99,6 +97,27 @@ def add_parser(subparsers, parent_parser):
         ),
         metavar="<number>",
     )
-
-    _add_annotating_args(import_parser)
+    import_parser.add_argument(
+        "--config",
+        type=str,
+        help=(
+            "Path to a config file that will be merged with the config "
+            "in the target repository."
+        ),
+    )
+    import_parser.add_argument(
+        "--remote",
+        type=str,
+        help="Remote name to set as a default in the target repository.",
+    )
+    import_parser.add_argument(
+        "--remote-config",
+        type=str,
+        nargs="*",
+        action=DictAction,
+        help=(
+            "Remote config options to merge with a remote's config (default or one "
+            "specified by '--remote') in the target repository."
+        ),
+    )
     import_parser.set_defaults(func=CmdImport)

dvc/commands/imp_url.py

@@ -15,35 +15,28 @@ class CmdImportUrl(CmdBase):
             self.repo.imp_url(
                 self.args.url,
                 out=self.args.out,
-                fname=self.args.file,
                 no_exec=self.args.no_exec,
                 no_download=self.args.no_download,
                 remote=self.args.remote,
                 to_remote=self.args.to_remote,
-                desc=self.args.desc,
-                type=self.args.type,
-                labels=self.args.labels,
-                meta=self.args.meta,
                 jobs=self.args.jobs,
+                force=self.args.force,
                 version_aware=self.args.version_aware,
             )
         except DvcException:
             logger.exception(
-                "failed to import {}. You could also try downloading "
-                "it manually, and adding it with `dvc add`.".format(
-                    self.args.url
-                )
+                (
+                    "failed to import %s. You could also try downloading "
+                    "it manually, and adding it with `dvc add`."
+                ),
+                self.args.url,
             )
             return 1
         return 0
 
 
 def add_parser(subparsers, parent_parser):
-    from .add import _add_annotating_args
-
-    IMPORT_HELP = (
-        "Download or copy file from URL and take it under DVC control."
-    )
+    IMPORT_HELP = "Download or copy file from URL and take it under DVC control."
 
     import_parser = subparsers.add_parser(
         "import-url",
@@ -54,39 +47,22 @@ def add_parser(subparsers, parent_parser):
     )
     import_parser.add_argument(
         "url",
-        help="Location of the data to download. Supported URLs:\n"
-        "/absolute/path/to/file/or/dir\n"
-        "relative/path/to/file/or/dir\n"
-        "C:\\\\path\\to\\file\\or\\dir\n"
-        "https://example.com/path/to/file\n"
-        "s3://bucket/key/path\n"
-        "gs://bucket/path/to/file/or/dir\n"
-        "hdfs://example.com/path/to/file\n"
-        "ssh://example.com/absolute/path/to/file/or/dir\n"
-        "remote://remote_name/path/to/file/or/dir (see `dvc remote`)",
+        help=(
+            "Location of the data to download. Supported URLs:\n"
+            "/absolute/path/to/file/or/dir\n"
+            "relative/path/to/file/or/dir\n"
+            "C:\\\\path\\to\\file\\or\\dir\n"
+            "https://example.com/path/to/file\n"
+            "s3://bucket/key/path\n"
+            "gs://bucket/path/to/file/or/dir\n"
+            "hdfs://example.com/path/to/file\n"
+            "ssh://example.com/absolute/path/to/file/or/dir\n"
+            "remote://remote_name/path/to/file/or/dir (see `dvc remote`)"
+        ),
     )
     import_parser.add_argument(
         "out", nargs="?", help="Destination path to put files to."
     ).complete = completion.DIR
-    import_parser.add_argument(
-        "--file",
-        help="Specify name of the .dvc file this command will generate.",
-        metavar="<filename>",
-    ).complete = completion.DIR
-    no_download_exec_group = import_parser.add_mutually_exclusive_group()
-    no_download_exec_group.add_argument(
-        "--no-exec",
-        action="store_true",
-        default=False,
-        help="Only create .dvc file without actually importing target data.",
-    )
-    no_download_exec_group.add_argument(
-        "--no-download",
-        action="store_true",
-        default=False,
-        help="Create .dvc file including target data hash value(s)"
-        " but do not actually download the file(s).",
-    )
     import_parser.add_argument(
         "--to-remote",
         action="store_true",
@@ -99,6 +75,22 @@ def add_parser(subparsers, parent_parser):
         help="Remote storage to download to",
         metavar="<name>",
     )
+    no_download_exec_group = import_parser.add_mutually_exclusive_group()
+    no_download_exec_group.add_argument(
+        "--no-exec",
+        action="store_true",
+        default=False,
+        help="Only create .dvc file without actually importing target data.",
+    )
+    no_download_exec_group.add_argument(
+        "--no-download",
+        action="store_true",
+        default=False,
+        help=(
+            "Create .dvc file including target data hash value(s)"
+            " but do not actually download the file(s)."
+        ),
+    )
     import_parser.add_argument(
         "-j",
         "--jobs",
@@ -109,14 +101,17 @@ def add_parser(subparsers, parent_parser):
         ),
         metavar="<number>",
     )
+    import_parser.add_argument(
+        "-f",
+        "--force",
+        action="store_true",
+        default=False,
+        help="Override local file or folder if exists.",
+    )
     import_parser.add_argument(
         "--version-aware",
         action="store_true",
         default=False,
-        help=(
-            "Import using cloud versioning. Implied if the URL contains a "
-            "version ID."
-        ),
+        help="Import using cloud versioning. Implied if the URL contains a version ID.",
     )
-    _add_annotating_args(import_parser)
     import_parser.set_defaults(func=CmdImportUrl)

dvc/commands/init.py

@@ -75,8 +75,9 @@ def add_parser(subparsers, parent_parser):
         "--no-scm",
         action="store_true",
         default=False,
-        help="Initiate DVC in directory that is "
-        "not tracked by any SCM tool (e.g. Git).",
+        help=(
+            "Initiate DVC in directory that is not tracked by any SCM tool (e.g. Git)."
+        ),
     )
     init_parser.add_argument(
         "-f",
@@ -84,8 +85,7 @@ def add_parser(subparsers, parent_parser):
         action="store_true",
         default=False,
         help=(
-            "Overwrite existing '.dvc/' directory. "
-            "This operation removes local cache."
+            "Overwrite existing '.dvc/' directory. This operation removes local cache."
         ),
     )
     init_parser.add_argument(

dvc/commands/install.py

@@ -31,7 +31,9 @@ def add_parser(subparsers, parent_parser):
         "--use-pre-commit-tool",
         action="store_true",
         default=False,
-        help="Install DVC hooks using pre-commit "
-        "(https://pre-commit.com) if it is installed.",
+        help=(
+            "Install DVC hooks using pre-commit "
+            "(https://pre-commit.com) if it is installed."
+        ),
     )
     install_parser.set_defaults(func=CmdInstall)

dvc/commands/ls/__init__.py

@@ -3,7 +3,7 @@ import logging
 
 from dvc.cli import completion
 from dvc.cli.command import CmdBaseNoRepo
-from dvc.cli.utils import append_doc_link
+from dvc.cli.utils import DictAction, append_doc_link
 from dvc.commands.ls.ls_colors import LsColors
 from dvc.exceptions import DvcException
 from dvc.ui import ui
@@ -34,6 +34,9 @@ class CmdList(CmdBaseNoRepo):
                 rev=self.args.rev,
                 recursive=self.args.recursive,
                 dvc_only=self.args.dvc_only,
+                config=self.args.config,
+                remote=self.args.remote,
+                remote_config=self.args.remote_config,
             )
             if self.args.json:
                 ui.write_json(entries)
@@ -71,7 +74,6 @@ def add_parser(subparsers, parent_parser):
     )
     list_parser.add_argument(
         "--json",
-        "--show-json",
         action="store_true",
         help="Show output in JSON format.",
     )
@@ -81,6 +83,29 @@ def add_parser(subparsers, parent_parser):
         help="Git revision (e.g. SHA, branch, tag)",
         metavar="<commit>",
     )
+    list_parser.add_argument(
+        "--config",
+        type=str,
+        help=(
+            "Path to a config file that will be merged with the config "
+            "in the target repository."
+        ),
+    )
+    list_parser.add_argument(
+        "--remote",
+        type=str,
+        help="Remote name to set as a default in the target repository.",
+    )
+    list_parser.add_argument(
+        "--remote-config",
+        type=str,
+        nargs="*",
+        action=DictAction,
+        help=(
+            "Remote config options to merge with a remote's config (default or one "
+            "specified by '--remote') in the target repository."
+        ),
+    )
     list_parser.add_argument(
         "path",
         nargs="?",

dvc/commands/ls/ls_colors.py

@@ -20,7 +20,7 @@ class LsColors:
             else:
                 self._codes[code] = color
 
-    def format(self, entry):
+    def format(self, entry):  # noqa: A003
         text = entry["path"]
 
         if entry.get("isout", False) and "out" in self._codes:

dvc/commands/machine.py

@@ -1,4 +1,5 @@
 import argparse
+from typing import Dict, List
 
 from dvc.cli.command import CmdBase
 from dvc.cli.utils import append_doc_link, fix_subparsers
@@ -6,7 +7,6 @@ from dvc.commands.config import CmdConfig
 from dvc.compare import TabularData
 from dvc.config import ConfigError
 from dvc.exceptions import DvcException
-from dvc.types import Dict, List
 from dvc.ui import ui
 from dvc.utils import format_link
 
@@ -18,7 +18,6 @@ class MachineDisabledError(ConfigError):
 
 class CmdMachineConfig(CmdConfig):
     def __init__(self, args):
-
         super().__init__(args)
         if not self.config["feature"].get("machine", False):
             raise MachineDisabledError
@@ -163,20 +162,18 @@ class CmdMachineRename(CmdBase):
         all_config = self.config.load_config_to_level(None)
         if self.args.new in all_config.get("machine", {}):
             raise ConfigError(
-                "Rename failed. Machine '{}' already exists.".format(
-                    self.args.new
-                )
+                f"Rename failed. Machine '{self.args.new}' already exists."
             )
         ui.write(f"Rename machine '{self.args.name}' to '{self.args.new}'.")
 
     def run(self):
-
         self._check_before_rename()
 
         with self.config.edit(self.args.level) as conf:
             self._check_exists(conf)
             conf["machine"][self.args.new] = conf["machine"][self.args.name]
             try:
+                assert self.repo.machine
                 self.repo.machine.rename(self.args.name, self.args.new)
             except DvcException as error:
                 del conf["machine"][self.args.new]
@@ -199,7 +196,7 @@ class CmdMachineDefault(CmdMachineConfig):
         if self.args.name is None and not self.args.unset:
             conf = self.config.read(self.args.level)
             try:
-                print(conf["core"]["machine"])
+                ui.write(conf["core"]["machine"])
             except KeyError:
                 ui.write("No default machine set")
                 return 1
@@ -208,9 +205,7 @@ class CmdMachineDefault(CmdMachineConfig):
                 if self.args.unset:
                     conf["core"].pop("machine", None)
                 else:
-                    merged_conf = self.config.load_config_to_level(
-                        self.args.level
-                    )
+                    merged_conf = self.config.load_config_to_level(self.args.level)
                     if (
                         self.args.name in conf["machine"]
                         or self.args.name in merged_conf["machine"]
@@ -218,8 +213,7 @@ class CmdMachineDefault(CmdMachineConfig):
                         conf["core"]["machine"] = self.args.name
                     else:
                         raise ConfigError(
-                            "default machine must be present in machine "
-                            "list."
+                            "default machine must be present in machine list."
                         )
         return 0
 
@@ -250,7 +244,6 @@ class CmdMachineStatus(CmdBase):
         all_status: List[Dict],
         td: TabularData,
     ):
-
         if not all_status:
             row = [
                 name,
@@ -309,7 +302,7 @@ class CmdMachineSsh(CmdBase):
         return 0
 
 
-def add_parser(subparsers, parent_parser):
+def add_parser(subparsers, parent_parser):  # noqa: PLR0915
     from dvc.commands.config import parent_config_parser
 
     machine_HELP = "Set up and manage cloud machines."
@@ -324,7 +317,7 @@ def add_parser(subparsers, parent_parser):
 
     machine_subparsers = machine_parser.add_subparsers(
         dest="cmd",
-        help="Use `dvc machine CMD --help` for " "command-specific help.",
+        help="Use `dvc machine CMD --help` for command-specific help.",
     )
 
     fix_subparsers(machine_subparsers)
@@ -342,8 +335,7 @@ def add_parser(subparsers, parent_parser):
         "cloud",
         help="Machine cloud. See full list of supported clouds at {}".format(
             format_link(
-                "https://github.com/iterative/"
-                "terraform-provider-iterative#machine"
+                "https://github.com/iterative/terraform-provider-iterative#machine"
             )
         ),
     )
@@ -371,9 +363,7 @@ def add_parser(subparsers, parent_parser):
         help=machine_DEFAULT_HELP,
         formatter_class=argparse.RawDescriptionHelpFormatter,
     )
-    machine_default_parser.add_argument(
-        "name", nargs="?", help="Name of the machine"
-    )
+    machine_default_parser.add_argument("name", nargs="?", help="Name of the machine")
     machine_default_parser.add_argument(
         "-u",
         "--unset",
@@ -413,9 +403,7 @@ def add_parser(subparsers, parent_parser):
         formatter_class=argparse.RawDescriptionHelpFormatter,
     )
     machine_modify_parser.add_argument("name", help="Name of the machine")
-    machine_modify_parser.add_argument(
-        "option", help="Name of the option to modify."
-    )
+    machine_modify_parser.add_argument("option", help="Name of the option to modify.")
     machine_modify_parser.add_argument(
         "value", nargs="?", help="(optional) Value of the option."
     )
@@ -448,9 +436,7 @@ def add_parser(subparsers, parent_parser):
         help=machine_REMOVE_HELP,
         formatter_class=argparse.RawDescriptionHelpFormatter,
     )
-    machine_remove_parser.add_argument(
-        "name", help="Name of the machine to remove."
-    )
+    machine_remove_parser.add_argument("name", help="Name of the machine to remove.")
     machine_remove_parser.set_defaults(func=CmdMachineRemove)
 
     machine_CREATE_HELP = "Create and start a machine instance."
@@ -461,14 +447,10 @@ def add_parser(subparsers, parent_parser):
         help=machine_CREATE_HELP,
         formatter_class=argparse.RawDescriptionHelpFormatter,
     )
-    machine_create_parser.add_argument(
-        "name", help="Name of the machine to create."
-    )
+    machine_create_parser.add_argument("name", help="Name of the machine to create.")
     machine_create_parser.set_defaults(func=CmdMachineCreate)
 
-    machine_STATUS_HELP = (
-        "List the status of running instances for one/all machines."
-    )
+    machine_STATUS_HELP = "List the status of running instances for one/all machines."
     machine_status_parser = machine_subparsers.add_parser(
         "status",
         parents=[parent_parser],

dvc/commands/metrics.py

@@ -140,14 +140,12 @@ def add_parser(subparsers, parent_parser):
     )
     metrics_show_parser.add_argument(
         "--json",
-        "--show-json",
         action="store_true",
         default=False,
         help="Show output in JSON format.",
     )
     metrics_show_parser.add_argument(
         "--md",
-        "--show-md",
         action="store_true",
         default=False,
         dest="markdown",
@@ -223,14 +221,12 @@ def add_parser(subparsers, parent_parser):
     )
     metrics_diff_parser.add_argument(
         "--json",
-        "--show-json",
         action="store_true",
         default=False,
         help="Show output in JSON format.",
     )
     metrics_diff_parser.add_argument(
         "--md",
-        "--show-md",
         action="store_true",
         default=False,
         dest="markdown",

dvc/commands/move.py

@@ -14,9 +14,7 @@ class CmdMove(CmdBase):
         try:
             self.repo.move(self.args.src, self.args.dst)
         except DvcException:
-            msg = "failed to move '{}' -> '{}'".format(
-                self.args.src, self.args.dst
-            )
+            msg = f"failed to move '{self.args.src}' -> '{self.args.dst}'"
             logger.exception(msg)
             return 1
         return 0
@@ -40,7 +38,5 @@ def add_parser(subparsers, parent_parser):
     move_parser.add_argument(
         "src", help="Source path to a data file or directory."
     ).complete = completion.FILE
-    move_parser.add_argument(
-        "dst", help="Destination path."
-    ).complete = completion.FILE
+    move_parser.add_argument("dst", help="Destination path.").complete = completion.FILE
     move_parser.set_defaults(func=CmdMove)

dvc/commands/params.py

@@ -79,7 +79,7 @@ def add_parser(subparsers, parent_parser):
     params_diff_parser.add_argument(
         "b_rev",
         nargs="?",
-        help=("New Git commit to compare (defaults to the current workspace)"),
+        help="New Git commit to compare (defaults to the current workspace)",
     )
     params_diff_parser.add_argument(
         "--targets",
@@ -105,14 +105,12 @@ def add_parser(subparsers, parent_parser):
     )
     params_diff_parser.add_argument(
         "--json",
-        "--show-json",
         action="store_true",
         default=False,
         help="Show output in JSON format.",
     )
     params_diff_parser.add_argument(
         "--md",
-        "--show-md",
         action="store_true",
         default=False,
         dest="markdown",

dvc/commands/plots.py

@@ -1,9 +1,9 @@
 import argparse
-import json
 import logging
 import os
+from typing import TYPE_CHECKING, Dict, List, Optional
 
-from funcy import first
+from funcy import compact, first, get_in
 
 from dvc.cli import completion
 from dvc.cli.command import CmdBase
@@ -12,16 +12,51 @@ from dvc.exceptions import DvcException
 from dvc.ui import ui
 from dvc.utils import format_link
 
+if TYPE_CHECKING:
+    from dvc.render.match import RendererWithErrors
+
+
 logger = logging.getLogger(__name__)
 
 
-def _show_json(renderers, split=False):
+def _show_json(
+    renderers_with_errors: List["RendererWithErrors"],
+    split=False,
+    errors: Optional[Dict[str, Exception]] = None,
+):
     from dvc.render.convert import to_json
+    from dvc.utils.serialize import encode_exception
 
-    result = {
-        renderer.name: to_json(renderer, split) for renderer in renderers
-    }
-    ui.write_json(result)
+    all_errors: List[Dict] = []
+    data = {}
+
+    for renderer, src_errors, def_errors in renderers_with_errors:
+        name = renderer.name
+        data[name] = to_json(renderer, split)
+        all_errors.extend(
+            {
+                "name": name,
+                "rev": rev,
+                "source": source,
+                **encode_exception(e),
+            }
+            for rev, per_rev_src_errors in src_errors.items()
+            for source, e in per_rev_src_errors.items()
+        )
+        all_errors.extend(
+            {
+                "name": name,
+                "rev": rev,
+                **encode_exception(e),
+            }
+            for rev, e in def_errors.items()
+        )
+
+    # these errors are not tied to any renderers
+    errors = errors or {}
+    all_errors.extend({"rev": rev, **encode_exception(e)} for rev, e in errors.items())
+
+    ui.write_json(compact({"errors": all_errors, "data": data}), highlight=False)
 
 
 def _adjust_vega_renderers(renderers):
@@ -78,12 +113,6 @@ class CmdPlots(CmdBase):
         props = {p: getattr(self.args, p) for p in PLOT_PROPS}
         return {k: v for k, v in props.items() if v is not None}
 
-    def _config_files(self):
-        config_files = None
-        if self.args.from_config:
-            config_files = {self.args.from_config}
-        return config_files
-
     def _html_template_path(self):
         html_template_path = self.args.html_template
         if not html_template_path:
@@ -91,12 +120,11 @@ class CmdPlots(CmdBase):
                 "html_template", None
             )
             if html_template_path and not os.path.isabs(html_template_path):
-                html_template_path = os.path.join(
-                    self.repo.dvc_dir, html_template_path
-                )
+                assert self.repo.dvc_dir
+                html_template_path = os.path.join(self.repo.dvc_dir, html_template_path)
         return html_template_path
 
-    def run(self):
+    def run(self) -> int:  # noqa: C901, PLR0911, PLR0912
         from pathlib import Path
 
         from dvc.render.match import match_defs_renderers
@@ -107,14 +135,11 @@ class CmdPlots(CmdBase):
                 logger.error("please specify a target for `--show-vega`")
                 return 1
             if len(self.args.targets) > 1:
-                logger.error(
-                    "you can only specify one target for `--show-vega`"
-                )
+                logger.error("you can only specify one target for `--show-vega`")
                 return 1
             if self.args.json:
                 logger.error(
-                    "'--show-vega' and '--json' are mutually exclusive "
-                    "options."
+                    "'--show-vega' and '--json' are mutually exclusive options."
                 )
                 return 1
 
@@ -122,37 +147,39 @@ class CmdPlots(CmdBase):
             plots_data = self._func(
                 targets=self.args.targets,
                 props=self._props(),
-                config_files=self._config_files(),
             )
 
-            if not plots_data:
+            if not plots_data and not self.args.json:
                 ui.error_write(
-                    "No plots were loaded, "
-                    "visualization file will not be created."
+                    "No plots were loaded, visualization file will not be created."
                 )
 
             out: str = self.args.out or self.repo.config.get("plots", {}).get(
                 "out_dir", "dvc_plots"
             )
 
-            renderers_out = (
-                out if self.args.json else os.path.join(out, "static")
-            )
-
-            renderers = match_defs_renderers(
+            renderers_out = out if self.args.json else os.path.join(out, "static")
+            renderers_with_errors = match_defs_renderers(
                 data=plots_data,
                 out=renderers_out,
                 templates_dir=self.repo.plots.templates_dir,
             )
             if self.args.json:
-                _show_json(renderers, self.args.split)
+                errors = compact(
+                    {
+                        rev: get_in(data, ["definitions", "error"])
+                        for rev, data in plots_data.items()
+                    }
+                )
+                _show_json(renderers_with_errors, self.args.split, errors=errors)
                 return 0
 
+            renderers = [r.renderer for r in renderers_with_errors]
             _adjust_vega_renderers(renderers)
             if self.args.show_vega:
                 renderer = first(filter(lambda r: r.TYPE == "vega", renderers))
                 if renderer:
-                    ui.write_json(json.loads(renderer.get_filled_template()))
+                    ui.write_json(renderer.get_filled_template(as_string=False))
                 return 0
 
             output_file: Path = (Path.cwd() / out).resolve() / "index.html"
@@ -161,7 +188,7 @@ class CmdPlots(CmdBase):
                 render_html(
                     renderers=renderers,
                     output_file=output_file,
-                    template_path=self._html_template_path(),
+                    html_template=self._html_template_path(),
                 )
 
                 ui.write(output_file.as_uri())
@@ -223,9 +250,8 @@ class CmdPlotsTemplates(CmdBase):
                         return 0
                 raise InvalidArgumentError(f"Unexpected template: {target}.")
 
-            else:
-                for template in TEMPLATES:
-                    ui.write(template.DEFAULT_NAME)
+            for template in TEMPLATES:
+                ui.write(template.DEFAULT_NAME)
 
             return 0
         except DvcException:
@@ -251,8 +277,7 @@ def add_parser(subparsers, parent_parser):
     fix_subparsers(plots_subparsers)
 
     SHOW_HELP = (
-        "Generate plots from target files or from `plots`"
-        " definitions in `dvc.yaml`."
+        "Generate plots from target files or from `plots` definitions in `dvc.yaml`."
     )
     plots_show_parser = plots_subparsers.add_parser(
         "show",
@@ -275,8 +300,7 @@ def add_parser(subparsers, parent_parser):
     plots_show_parser.set_defaults(func=CmdPlotsShow)
 
     PLOTS_DIFF_HELP = (
-        "Show multiple versions of a plot by overlaying them "
-        "in a single image."
+        "Show multiple versions of a plot by overlaying them in a single image."
     )
     plots_diff_parser = plots_subparsers.add_parser(
         "diff",
@@ -334,9 +358,7 @@ def add_parser(subparsers, parent_parser):
     )
     plots_modify_parser.set_defaults(func=CmdPlotsModify)
 
-    TEMPLATES_HELP = (
-        "List built-in plots templates or show JSON specification for one."
-    )
+    TEMPLATES_HELP = "List built-in plots templates or show JSON specification for one."
     plots_templates_parser = plots_subparsers.add_parser(
         "templates",
         parents=[parent_parser],
@@ -362,11 +384,8 @@ def _add_props_arguments(parser):
         "--template",
         nargs="?",
         default=None,
-        help=(
-            "Special JSON or HTML schema file to inject with the data. "
-            "See {}".format(
-                format_link("https://man.dvc.org/plots#plot-templates")
-            )
+        help="Special JSON or HTML schema file to inject with the data. See {}".format(
+            format_link("https://man.dvc.org/plots#plot-templates")
         ),
         metavar="<path>",
     ).complete = completion.FILE
@@ -383,9 +402,7 @@ def _add_props_arguments(parser):
         default=None,  # Use default None to distinguish when it's not used
         help="Provided CSV or TSV datafile does not have a header.",
     )
-    parser.add_argument(
-        "--title", default=None, metavar="<text>", help="Plot title."
-    )
+    parser.add_argument("--title", default=None, metavar="<text>", help="Plot title.")
     parser.add_argument(
         "--x-label", default=None, help="X axis label", metavar="<text>"
     )
@@ -413,7 +430,6 @@ def _add_ui_arguments(parser):
     )
     parser.add_argument(
         "--json",
-        "--show-json",
         action="store_true",
         default=False,
         help=argparse.SUPPRESS,
@@ -433,9 +449,3 @@ def _add_ui_arguments(parser):
         help="Custom HTML template for VEGA visualization.",
         metavar="<path>",
     )
-    parser.add_argument(
-        "--from-config",
-        default=None,
-        metavar="<path>",
-        help=argparse.SUPPRESS,
-    )

dvc/commands/queue/__init__.py

@@ -26,7 +26,7 @@ def add_parser(subparsers, parent_parser):
 
     queue_subparsers = queue_parser.add_subparsers(
         dest="cmd",
-        help="Use `dvc queue CMD --help` to display " "command-specific help.",
+        help="Use `dvc queue CMD --help` to display command-specific help.",
     )
 
     fix_subparsers(queue_subparsers)

dvc/commands/queue/kill.py

@@ -11,13 +11,17 @@ class CmdQueueKill(CmdBase):
     """Kill exp task in queue."""
 
     def run(self):
-        self.repo.experiments.celery_queue.kill(revs=self.args.task)
+        self.repo.experiments.celery_queue.kill(
+            revs=self.args.task, force=self.args.force
+        )
 
         return 0
 
 
 def add_parser(queue_subparsers, parent_parser):
-    QUEUE_KILL_HELP = "Kill actively running experiment queue tasks."
+    QUEUE_KILL_HELP = (
+        "Gracefully interrupt running experiment queue tasks (equivalent to Ctrl-C)"
+    )
     queue_kill_parser = queue_subparsers.add_parser(
         "kill",
         parents=[parent_parser],
@@ -25,6 +29,13 @@ def add_parser(queue_subparsers, parent_parser):
         help=QUEUE_KILL_HELP,
         formatter_class=argparse.RawDescriptionHelpFormatter,
     )
+    queue_kill_parser.add_argument(
+        "-f",
+        "--force",
+        action="store_true",
+        default=False,
+        help="Forcefully and immediately kill running experiment queue tasks",
+    )
     queue_kill_parser.add_argument(
         "task",
         nargs="*",

dvc/commands/queue/logs.py

@@ -34,9 +34,7 @@ def add_parser(queue_subparsers, parent_parser):
     queue_logs_parser.add_argument(
         "-e",
         "--encoding",
-        help=(
-            "Text encoding for log output. Defaults to system locale encoding."
-        ),
+        help="Text encoding for log output. Defaults to system locale encoding.",
         metavar="<encoding>",
     )
     queue_logs_parser.add_argument(

dvc/commands/queue/remove.py

@@ -28,7 +28,6 @@ class CmdQueueRemove(CmdBase):
             )
 
     def run(self):
-
         self.check_arguments()
 
         if self.args.all:
@@ -57,7 +56,6 @@ class CmdQueueRemove(CmdBase):
 
 
 def add_parser(queue_subparsers, parent_parser):
-
     QUEUE_REMOVE_HELP = "Remove queued and completed tasks from the queue."
     queue_remove_parser = queue_subparsers.add_parser(
         "remove",

dvc/commands/queue/start.py

@@ -12,20 +12,15 @@ class CmdQueueStart(CmdBase):
     """Start exp queue workers."""
 
     def run(self):
-        started = self.repo.experiments.celery_queue.start_workers(
-            self.args.jobs
-        )
+        started = self.repo.experiments.celery_queue.start_workers(self.args.jobs)
 
         suffix = "s" if started > 1 else ""
-        ui.write(
-            f"Started '{started}' new experiments task queue worker{suffix}."
-        )
+        ui.write(f"Started '{started}' new experiments task queue worker{suffix}.")
 
         return 0
 
 
 def add_parser(queue_subparsers, parent_parser):
-
     QUEUE_START_HELP = "Start the experiments task queue worker."
     queue_start_parser = queue_subparsers.add_parser(
         "start",
@@ -39,10 +34,7 @@ def add_parser(queue_subparsers, parent_parser):
         "--jobs",
         type=int,
         default=1,
-        help=(
-            "Maximum number of concurrent queue workers to start. "
-            "Defaults to 1."
-        ),
+        help="Maximum number of concurrent queue workers to start. Defaults to 1.",
         metavar="<number>",
     )
     queue_start_parser.set_defaults(func=CmdQueueStart)

dvc/commands/queue/status.py

@@ -1,33 +1,32 @@
 import argparse
 import logging
-from typing import List, Mapping, Optional
 
 from dvc.cli.command import CmdBase
 from dvc.cli.utils import append_doc_link
 from dvc.compare import TabularData
 from dvc.ui import ui
 
-from ..experiments.show import format_time
-
 logger = logging.getLogger(__name__)
 
 
 class CmdQueueStatus(CmdBase):
     """Show queue task and worker status."""
 
-    def run(self):
-        result: List[
-            Mapping[str, Optional[str]]
-        ] = self.repo.experiments.celery_queue.status()
+    def run(self) -> int:
+        from dvc.repo.experiments.show import format_time
+
+        result = self.repo.experiments.celery_queue.status()
         if result:
             all_headers = ["Task", "Name", "Created", "Status"]
             td = TabularData(all_headers)
             for exp in result:
                 created = format_time(exp.get("timestamp"))
+                assert exp["rev"]
+                assert exp["status"]
                 td.append(
                     [
                         exp["rev"][:7],
-                        exp.get("name", ""),
+                        exp.get("name") or "",
                         created,
                         exp["status"],
                     ]
@@ -38,9 +37,7 @@ class CmdQueueStatus(CmdBase):
         ui.write()
 
         worker_status = self.repo.experiments.celery_queue.worker_status()
-        active_count = len(
-            [name for name, task in worker_status.items() if task]
-        )
+        active_count = len([name for name, task in worker_status.items() if task])
         idle_count = len(worker_status) - active_count
 
         ui.write(f"Worker status: {active_count} active, {idle_count} idle")
@@ -49,9 +46,7 @@ class CmdQueueStatus(CmdBase):
 
 
 def add_parser(queue_subparsers, parent_parser):
-    QUEUE_STATUS_HELP = (
-        "Show the status of experiments queue tasks and workers."
-    )
+    QUEUE_STATUS_HELP = "Show the status of experiments queue tasks and workers."
     queue_status_parser = queue_subparsers.add_parser(
         "status",
         parents=[parent_parser],

dvc/commands/queue/stop.py

@@ -26,7 +26,6 @@ class CmdQueueStop(CmdBase):
 
 
 def add_parser(queue_subparsers, parent_parser):
-
     QUEUE_STOP_HELP = "Stop all experiments task queue workers."
     queue_stop_parser = queue_subparsers.add_parser(
         "stop",

dvc/commands/remote.py

@@ -95,9 +95,7 @@ class CmdRemoteDefault(CmdRemote):
                 if self.args.unset:
                     conf["core"].pop("remote", None)
                 else:
-                    merged_conf = self.config.load_config_to_level(
-                        self.args.level
-                    )
+                    merged_conf = self.config.load_config_to_level(self.args.level)
                     if (
                         self.args.name in conf["remote"]
                         or self.args.name in merged_conf["remote"]
@@ -129,9 +127,7 @@ class CmdRemoteRename(CmdRemote):
         all_config = self.config.load_config_to_level(None)
         if self.args.new in all_config.get("remote", {}):
             raise ConfigError(
-                "Rename failed. Remote name '{}' already exists.".format(
-                    {self.args.new}
-                )
+                f"Rename failed. Remote name {self.args.new!r} already exists."
             )
 
         with self.config.edit(self.args.level) as conf:
@@ -164,7 +160,7 @@ def add_parser(subparsers, parent_parser):
 
     remote_subparsers = remote_parser.add_subparsers(
         dest="cmd",
-        help="Use `dvc remote CMD --help` for " "command-specific help.",
+        help="Use `dvc remote CMD --help` for command-specific help.",
     )
 
     fix_subparsers(remote_subparsers)
@@ -208,9 +204,7 @@ def add_parser(subparsers, parent_parser):
         help=REMOTE_DEFAULT_HELP,
         formatter_class=argparse.RawDescriptionHelpFormatter,
     )
-    remote_default_parser.add_argument(
-        "name", nargs="?", help="Name of the remote"
-    )
+    remote_default_parser.add_argument("name", nargs="?", help="Name of the remote")
     remote_default_parser.add_argument(
         "-u",
         "--unset",
@@ -229,9 +223,7 @@ def add_parser(subparsers, parent_parser):
         formatter_class=argparse.RawDescriptionHelpFormatter,
     )
     remote_modify_parser.add_argument("name", help="Name of the remote")
-    remote_modify_parser.add_argument(
-        "option", help="Name of the option to modify."
-    )
+    remote_modify_parser.add_argument("option", help="Name of the option to modify.")
     remote_modify_parser.add_argument(
         "value", nargs="?", help="(optional) Value of the option."
     )
@@ -262,9 +254,7 @@ def add_parser(subparsers, parent_parser):
         help=REMOTE_REMOVE_HELP,
         formatter_class=argparse.RawDescriptionHelpFormatter,
     )
-    remote_remove_parser.add_argument(
-        "name", help="Name of the remote to remove."
-    )
+    remote_remove_parser.add_argument("name", help="Name of the remote to remove.")
     remote_remove_parser.set_defaults(func=CmdRemoteRemove)
     REMOTE_RENAME_HELP = "Rename a DVC remote"
     remote_rename_parser = remote_subparsers.add_parser(

dvc/commands/remove.py

@@ -22,8 +22,7 @@ class CmdRemove(CmdBase):
 
 def add_parser(subparsers, parent_parser):
     REMOVE_HELP = (
-        "Remove stages from dvc.yaml and/or"
-        " stop tracking files or directories."
+        "Remove stages from dvc.yaml and/or stop tracking files or directories."
     )
     remove_parser = subparsers.add_parser(
         "remove",

dvc/commands/repro.py

@@ -10,20 +10,12 @@ class CmdRepro(CmdBase):
     def run(self):
         from dvc.ui import ui
 
-        stages = self.repo.reproduce(
-            **self._common_kwargs, **self._repro_kwargs
-        )
+        stages = self.repo.reproduce(**self._common_kwargs, **self._repro_kwargs)
         if len(stages) == 0:
             ui.write(CmdDataStatus.UP_TO_DATE_MSG)
         else:
             ui.write("Use `dvc push` to send your updates to remote storage.")
 
-        if self.args.metrics:
-            from dvc.compare import show_metrics
-
-            metrics = self.repo.metrics.show()
-            show_metrics(metrics)
-
         return 0
 
     @property
@@ -40,6 +32,8 @@ class CmdRepro(CmdBase):
             "recursive": self.args.recursive,
             "force_downstream": self.args.force_downstream,
             "pull": self.args.pull,
+            "allow_missing": self.args.allow_missing,
+            "on_error": self.args.on_error,
         }
 
     @property
@@ -55,16 +49,14 @@ def add_arguments(repro_parser):
     repro_parser.add_argument(
         "targets",
         nargs="*",
-        help=(
-            """\
+        help="""\
 Stages to reproduce. 'dvc.yaml' by default.
 The targets can be path to a dvc.yaml file or `.dvc` file,
 or a stage name from dvc.yaml file from
 current working directory. To run a stage from dvc.yaml
 from other directories, the target must be a path followed by colon `:`
 and then the stage name name.
-"""
-        ),
+""",
     ).complete = completion.DVCFILES_AND_STAGE
     repro_parser.add_argument(
         "-f",
@@ -85,16 +77,14 @@ and then the stage name name.
         "--single-item",
         action="store_true",
         default=False,
-        help="Reproduce only single data item without recursive dependencies "
-        "check.",
+        help="Reproduce only single data item without recursive dependencies check.",
     )
     repro_parser.add_argument(
         "-p",
         "--pipeline",
         action="store_true",
         default=False,
-        help="Reproduce the whole pipeline that the specified targets "
-        "belong to.",
+        help="Reproduce the whole pipeline that the specified targets belong to.",
     )
     repro_parser.add_argument(
         "-P",
@@ -110,13 +100,6 @@ and then the stage name name.
         default=False,
         help="Reproduce all stages in the specified directory.",
     )
-    repro_parser.add_argument(
-        "-m",
-        "--metrics",
-        action="store_true",
-        default=False,
-        help="Show metrics after reproduction.",
-    )
     repro_parser.add_argument(
         "--downstream",
         action="store_true",
@@ -127,8 +110,10 @@ and then the stage name name.
         "--force-downstream",
         action="store_true",
         default=False,
-        help="Reproduce all descendants of a changed stage even if their "
-        "direct dependencies didn't change.",
+        help=(
+            "Reproduce all descendants of a changed stage even if their "
+            "direct dependencies didn't change."
+        ),
     )
     repro_parser.add_argument(
         "--pull",
@@ -139,19 +124,44 @@ and then the stage name name.
             "from the run-cache."
         ),
     )
+    repro_parser.add_argument(
+        "--allow-missing",
+        action="store_true",
+        default=False,
+        help=("Skip stages with missing data but no other changes."),
+    )
     repro_parser.add_argument(
         "--dry",
         action="store_true",
         default=False,
-        help="Only print the commands that would be executed without "
-        "actually executing.",
+        help=(
+            "Only print the commands that would be executed without actually executing."
+        ),
+    )
+    repro_parser.add_argument(
+        "-k",
+        "--keep-going",
+        action="store_const",
+        default="fail",
+        const="keep-going",
+        dest="on_error",
+        help=(
+            "Continue executing, skipping stages having dependencies "
+            "on the failed stages"
+        ),
+    )
+    repro_parser.add_argument(
+        "--ignore-errors",
+        action="store_const",
+        default="fail",
+        const="ignore",
+        dest="on_error",
+        help="Ignore errors from stages.",
     )
 
 
 def add_parser(subparsers, parent_parser):
-    REPRO_HELP = (
-        "Reproduce complete or partial pipelines by executing their stages."
-    )
+    REPRO_HELP = "Reproduce complete or partial pipelines by executing their stages."
     repro_parser = subparsers.add_parser(
         "repro",
         parents=[parent_parser],

dvc/commands/run.py

@@ -1,100 +0,0 @@
-import argparse
-import logging
-
-from dvc.cli.command import CmdBase
-from dvc.cli.utils import append_doc_link
-from dvc.commands.stage import parse_cmd
-from dvc.exceptions import DvcException
-
-logger = logging.getLogger(__name__)
-
-
-class CmdRun(CmdBase):
-    def run(self):
-        if not any(
-            [
-                self.args.deps,
-                self.args.outs,
-                self.args.outs_no_cache,
-                self.args.metrics,
-                self.args.metrics_no_cache,
-                self.args.plots,
-                self.args.plots_no_cache,
-                self.args.outs_persist,
-                self.args.outs_persist_no_cache,
-                self.args.checkpoints,
-                self.args.params,
-                self.args.command,
-            ]
-        ):  # pragma: no cover
-            logger.error(
-                "too few arguments. Specify at least one: `-d`, `-o`, `-O`, "
-                "`-m`, `-M`, `-p`, `--plots`, `--plots-no-cache`, "
-                "`--outs-persist`, `--outs-persist-no-cache`, `command`."
-            )
-            return 1
-
-        kwargs = vars(self.args)
-        kwargs.update(
-            {
-                "cmd": parse_cmd(self.args.command),
-                "fname": kwargs.pop("file"),
-                "no_exec": (self.args.no_exec or bool(self.args.checkpoints)),
-                "run_cache": not kwargs.pop("no_run_cache"),
-            }
-        )
-        try:
-            self.repo.run(**kwargs)
-        except DvcException:
-            logger.exception("")
-            return 1
-
-        return 0
-
-
-def add_parser(subparsers, parent_parser):
-    from dvc.commands.stage import _add_common_args
-
-    RUN_HELP = (
-        "Generate a dvc.yaml file from a command and execute the command."
-    )
-    run_parser = subparsers.add_parser(
-        "run",
-        parents=[parent_parser],
-        description=append_doc_link(RUN_HELP, "run"),
-        help=RUN_HELP,
-        formatter_class=argparse.RawDescriptionHelpFormatter,
-    )
-    run_parser.add_argument("-n", "--name", help="Stage name.")
-    run_parser.add_argument(
-        "--file", metavar="<filename>", help=argparse.SUPPRESS
-    )
-    run_parser.add_argument(
-        "--single-stage",
-        action="store_true",
-        default=False,
-        help=argparse.SUPPRESS,
-    )
-    _add_common_args(run_parser)
-    run_parser.add_argument(
-        "--no-exec",
-        action="store_true",
-        default=False,
-        help="Only create dvc.yaml without actually running it.",
-    )
-    run_parser.add_argument(
-        "--no-commit",
-        action="store_true",
-        default=False,
-        help="Don't put files/directories into cache.",
-    )
-    run_parser.add_argument(
-        "--no-run-cache",
-        action="store_true",
-        default=False,
-        help=(
-            "Execute the command even if this stage has already been run "
-            "with the same command/dependencies/outputs/etc before."
-        ),
-    )
-    run_parser.set_defaults(func=CmdRun)

dvc/commands/stage.py

@@ -1,5 +1,6 @@
 import argparse
 import logging
+from contextlib import contextmanager
 from itertools import chain, filterfalse
 from typing import TYPE_CHECKING, Dict, Iterable, List
 
@@ -44,9 +45,7 @@ def generate_description(stage: "Stage") -> str:
     return "; ".join(desc)
 
 
-def prepare_description(
-    stage: "Stage", max_length: int = MAX_TEXT_LENGTH
-) -> str:
+def prepare_description(stage: "Stage", max_length: int = MAX_TEXT_LENGTH) -> str:
     desc = stage.short_description() or generate_description(stage)
     return truncate_text(desc, max_length)
 
@@ -57,9 +56,9 @@ def prepare_stages_data(
     max_length: int = MAX_TEXT_LENGTH,
 ) -> Dict[str, str]:
     return {
-        stage.addressing: prepare_description(stage, max_length=max_length)
-        if description
-        else ""
+        stage.addressing: (
+            prepare_description(stage, max_length=max_length) if description else ""
+        )
         for stage in stages
     }
 
@@ -67,7 +66,7 @@ def prepare_stages_data(
 class CmdStageList(CmdBase):
     def _get_stages(self) -> Iterable["Stage"]:
         if self.args.all:
-            stages: List["Stage"] = self.repo.index.stages  # type: ignore
+            stages: List["Stage"] = self.repo.index.stages
             logger.trace(  # type: ignore[attr-defined]
                 "%d no. of stages found", len(stages)
             )
@@ -75,9 +74,7 @@ class CmdStageList(CmdBase):
 
         # removing duplicates while maintaining order
         collected = chain.from_iterable(
-            self.repo.stage.collect(
-                target=target, recursive=self.args.recursive
-            )
+            self.repo.stage.collect(target=target, recursive=self.args.recursive)
             for target in self.args.targets
         )
         return dict.fromkeys(collected).keys()
@@ -95,7 +92,7 @@ class CmdStageList(CmdBase):
 
         stages = self._get_stages()
         data = prepare_stages_data(stages, description=not self.args.name_only)
-        ui.table(data.items())
+        ui.table(list(data.items()))
 
         return 0
 
@@ -123,8 +120,22 @@ def parse_cmd(commands: List[str]) -> str:
     return " ".join(map(quote_argument, commands))
 
 
+@contextmanager
+def _disable_logging(highest_level=logging.CRITICAL):
+    previous_level = logging.root.manager.disable
+
+    logging.disable(highest_level)
+
+    try:
+        yield
+    finally:
+        logging.disable(previous_level)
+
+
 class CmdStageAdd(CmdBase):
     def run(self):
+        from dvc.repo import lock_repo
+
         kwargs = vars(self.args)
         kwargs.update(
             {
@@ -132,7 +143,15 @@ class CmdStageAdd(CmdBase):
                 "params": parse_params(self.args.params),
             }
         )
-        self.repo.stage.add(**kwargs)
+
+        with self.repo.scm_context, lock_repo(self.repo):
+            with _disable_logging(logging.INFO):
+                stage = self.repo.stage.add(**kwargs)
+            logger.info("Added stage %r in %r", stage.addressing, stage.relpath)
+            if self.args.run:
+                stage.run()
+                stage.dump(update_pipeline=False)
+
         return 0
 
 
@@ -173,39 +192,24 @@ def _add_common_args(parser):
         "--outs-no-cache",
         action="append",
         default=[],
-        help="Declare output file or directory "
-        "(do not put into DVC cache).",
+        help="Declare output file or directory (do not put into DVC cache).",
         metavar="<filename>",
     ).complete = completion.FILE
-    parser.add_argument(
-        "-c",
-        "--checkpoints",
-        action="append",
-        default=[],
-        help="Declare checkpoint output file or directory for 'dvc exp run'. "
-        "Not compatible with 'dvc repro'.",
-        metavar="<filename>",
-    ).complete = completion.FILE
-    parser.add_argument(
-        "--external",
-        action="store_true",
-        default=False,
-        help="Allow outputs that are outside of the DVC repository.",
-    )
     parser.add_argument(
         "--outs-persist",
         action="append",
         default=[],
-        help="Declare output file or directory that will not be "
-        "removed upon repro.",
+        help="Declare output file or directory that will not be removed upon repro.",
         metavar="<filename>",
     )
     parser.add_argument(
         "--outs-persist-no-cache",
         action="append",
         default=[],
-        help="Declare output file or directory that will not be "
-        "removed upon repro (do not put into DVC cache).",
+        help=(
+            "Declare output file or directory that will not be "
+            "removed upon repro (do not put into DVC cache)."
+        ),
         metavar="<filename>",
     )
     parser.add_argument(
@@ -259,6 +263,12 @@ def _add_common_args(parser):
             "This doesn't affect any DVC operations."
         ),
     )
+    parser.add_argument(
+        "--run",
+        action="store_true",
+        default=False,
+        help="Execute the stage after generating it.",
+    )
     parser.add_argument(
         "command",
         nargs=argparse.REMAINDER,

dvc/commands/status.py

@@ -81,9 +81,7 @@ class CmdDataStatus(CmdDataBase):
             if not self.repo.index.stages:
                 ui.write(self.EMPTY_PROJECT_MSG)
             elif self.args.cloud or self.args.remote:
-                remote = self.args.remote or self.repo.config["core"].get(
-                    "remote"
-                )
+                remote = self.args.remote or self.repo.config["core"].get("remote")
                 ui.write(self.IN_SYNC_MSG.format(remote=remote))
             else:
                 ui.write(self.UP_TO_DATE_MSG)

dvc/commands/update.py

@@ -60,8 +60,10 @@ def add_parser(subparsers, parent_parser):
         "--no-download",
         action="store_true",
         default=False,
-        help="Update .dvc file git revision/hash value(s)"
-        " but do not download the file(s).",
+        help=(
+            "Update .dvc file git revision/hash value(s)"
+            " but do not download the file(s)."
+        ),
     )
     update_parser.add_argument(
         "--to-remote",

dvc/commands/version.py

@@ -21,9 +21,7 @@ class CmdVersion(CmdBaseNoRepo):
 
 
 def add_parser(subparsers, parent_parser):
-    VERSION_HELP = (
-        "Display the DVC version and system/environment information."
-    )
+    VERSION_HELP = "Display the DVC version and system/environment information."
     version_parser = subparsers.add_parser(
         "version",
         parents=[parent_parser],

dvc/compare.py

@@ -22,7 +22,6 @@ from typing import (
 from funcy import reraise
 
 if TYPE_CHECKING:
-    from dvc.types import StrPath
     from dvc.ui.table import CellT
 
 
@@ -35,7 +34,7 @@ def with_value(value, default):
 
 
 class TabularData(MutableSequence[Sequence["CellT"]]):
-    def __init__(self, columns: Sequence[str], fill_value: str = ""):
+    def __init__(self, columns: Sequence[str], fill_value: Optional[str] = ""):
         self._columns: Dict[str, Column] = {name: Column() for name in columns}
         self._keys: List[str] = list(columns)
         self._fill_value = fill_value
@@ -64,9 +63,7 @@ class TabularData(MutableSequence[Sequence["CellT"]]):
     def keys(self) -> List[str]:
         return self._keys
 
-    def _iter_col_row(
-        self, row: Sequence["CellT"]
-    ) -> Iterator[Tuple["CellT", Column]]:
+    def _iter_col_row(self, row: Sequence["CellT"]) -> Iterator[Tuple["CellT", Column]]:
         for val, col in zip_longest(row, self.columns):
             if col is None:
                 break
@@ -103,9 +100,7 @@ class TabularData(MutableSequence[Sequence["CellT"]]):
         ...
 
     @overload
-    def __setitem__(
-        self, item: slice, value: Iterable[Sequence["CellT"]]
-    ) -> None:
+    def __setitem__(self, item: slice, value: Iterable[Sequence["CellT"]]) -> None:
         ...
 
     def __setitem__(self, item, value) -> None:
@@ -113,8 +108,7 @@ class TabularData(MutableSequence[Sequence["CellT"]]):
         if isinstance(item, slice):
             n = len(self.columns)
             normalized_rows = (
-                chain(val, repeat(self._fill_value, n - len(val)))
-                for val in value
+                chain(val, repeat(self._fill_value, n - len(val))) for val in value
             )
             # we need to transpose those rows into columnar format
             # as we work in terms of column-based arrays
@@ -166,24 +160,6 @@ class TabularData(MutableSequence[Sequence["CellT"]]):
             writer.writerow(row)
         return buff.getvalue()
 
-    def to_parallel_coordinates(
-        self, output_path: "StrPath", color_by: str = None
-    ) -> "StrPath":
-        from dvc_render.html import render_html
-        from dvc_render.plotly import ParallelCoordinatesRenderer
-
-        render_html(
-            renderers=[
-                ParallelCoordinatesRenderer(
-                    self.as_dict(),
-                    color_by=color_by,
-                    fill_value=self._fill_value,
-                )
-            ],
-            output_file=output_path,
-        )
-        return output_path
-
     def add_column(self, name: str) -> None:
         self._columns[name] = Column([self._fill_value] * len(self))
         self._keys.append(name)
@@ -208,14 +184,12 @@ class TabularData(MutableSequence[Sequence["CellT"]]):
             ui.table(self, headers=self.keys(), **kwargs)
 
     def as_dict(
-        self, cols: Iterable[str] = None
+        self, cols: Optional[Iterable[str]] = None
     ) -> Iterable[Dict[str, "CellT"]]:
         keys = self.keys() if cols is None else set(cols)
-        return [
-            {k: self._columns[k][i] for k in keys} for i in range(len(self))
-        ]
+        return [{k: self._columns[k][i] for k in keys} for i in range(len(self))]
 
-    def dropna(
+    def dropna(  # noqa: C901, PLR0912
         self,
         axis: str = "rows",
         how="any",
@@ -223,13 +197,10 @@ class TabularData(MutableSequence[Sequence["CellT"]]):
     ):
         if axis not in ["rows", "cols"]:
             raise ValueError(
-                f"Invalid 'axis' value {axis}."
-                "Choose one of ['rows', 'cols']"
+                f"Invalid 'axis' value {axis}.Choose one of ['rows', 'cols']"
             )
         if how not in ["any", "all"]:
-            raise ValueError(
-                f"Invalid 'how' value {how}." "Choose one of ['any', 'all']"
-            )
+            raise ValueError(f"Invalid 'how' value {how}. Choose one of ['any', 'all']")
 
         match_line: Set = set()
         match_any = True
@@ -244,8 +215,7 @@ class TabularData(MutableSequence[Sequence["CellT"]]):
                     if axis == "rows":
                         match_line.add(n_row)
                         break
-                    else:
-                        match_line.add(self.keys()[n_col])
+                    match_line.add(self.keys()[n_col])
 
         to_drop = match_line
         if how == "all":
@@ -258,16 +228,12 @@ class TabularData(MutableSequence[Sequence["CellT"]]):
         if axis == "rows":
             for name in self.keys():
                 self._columns[name] = Column(
-                    [
-                        x
-                        for n, x in enumerate(self._columns[name])
-                        if n not in to_drop
-                    ]
+                    [x for n, x in enumerate(self._columns[name]) if n not in to_drop]
                 )
         else:
             self.drop(*to_drop)
 
-    def drop_duplicates(
+    def drop_duplicates(  # noqa: C901
         self,
         axis: str = "rows",
         subset: Optional[Iterable[str]] = None,
@@ -275,8 +241,7 @@ class TabularData(MutableSequence[Sequence["CellT"]]):
     ):
         if axis not in ["rows", "cols"]:
             raise ValueError(
-                f"Invalid 'axis' value {axis}."
-                "Choose one of ['rows', 'cols']"
+                f"Invalid 'axis' value {axis}.Choose one of ['rows', 'cols']"
             )
 
         if axis == "cols":
@@ -324,12 +289,13 @@ def _normalize_float(val: float, precision: int):
 
 
 def _format_field(
-    val: Any, precision: int = None, round_digits: bool = False
+    val: Any, precision: Optional[int] = None, round_digits: bool = False
 ) -> str:
     def _format(_val):
         if isinstance(_val, float) and precision:
-            func = round if round_digits else _normalize_float
-            return func(_val, precision)
+            if round_digits:
+                return round(_val, precision)
+            return _normalize_float(_val, precision)
         if isinstance(_val, abc.Mapping):
             return {k: _format(v) for k, v in _val.items()}
         if isinstance(_val, list):
@@ -345,11 +311,11 @@ def diff_table(
     old: bool = True,
     no_path: bool = False,
     show_changes: bool = True,
-    precision: int = None,
+    precision: Optional[int] = None,
     round_digits: bool = False,
-    on_empty_diff: str = None,
-    a_rev: str = None,
-    b_rev: str = None,
+    on_empty_diff: Optional[str] = None,
+    a_rev: Optional[str] = None,
+    b_rev: Optional[str] = None,
 ) -> TabularData:
     a_rev = a_rev or "HEAD"
     b_rev = b_rev or "workspace"
@@ -361,9 +327,7 @@ def diff_table(
         for item, change in sorted(diff_in_file.items()):
             old_value = with_value(change.get("old"), fill_value)
             new_value = with_value(change.get("new"), fill_value)
-            diff_value = with_value(
-                change.get("diff", on_empty_diff), fill_value
-            )
+            diff_value = with_value(change.get("diff", on_empty_diff), fill_value)
             td.append(
                 [
                     fname,
@@ -387,18 +351,18 @@ def diff_table(
     return td
 
 
-def show_diff(
+def show_diff(  # noqa: PLR0913
     diff,
     title: str,
     old: bool = True,
     no_path: bool = False,
     show_changes: bool = True,
-    precision: int = None,
+    precision: Optional[int] = None,
     round_digits: bool = False,
-    on_empty_diff: str = None,
+    on_empty_diff: Optional[str] = None,
     markdown: bool = False,
-    a_rev: str = None,
-    b_rev: str = None,
+    a_rev: Optional[str] = None,
+    b_rev: Optional[str] = None,
 ) -> None:
     td = diff_table(
         diff,
@@ -420,7 +384,7 @@ def metrics_table(
     all_branches: bool = False,
     all_tags: bool = False,
     all_commits: bool = False,
-    precision: int = None,
+    precision: Optional[int] = None,
     round_digits: bool = False,
 ):
     from dvc.utils.diff import format_dict
@@ -460,7 +424,7 @@ def show_metrics(
     all_branches: bool = False,
     all_tags: bool = False,
     all_commits: bool = False,
-    precision: int = None,
+    precision: Optional[int] = None,
     round_digits: bool = False,
 ) -> None:
     td = metrics_table(

dvc/config.py

@@ -4,11 +4,18 @@ import os
 import re
 from contextlib import contextmanager
 from functools import partial
+from typing import TYPE_CHECKING, Dict, Optional
 
-from funcy import cached_property, compact, memoize, re_find
+from funcy import compact, memoize, re_find
 
 from dvc.exceptions import DvcException, NotDvcRepoError
 
+from .utils.objects import cached_property
+
+if TYPE_CHECKING:
+    from dvc.fs import FileSystem
+    from dvc.types import DictStrAny, StrPath
+
 logger = logging.getLogger(__name__)
 
 
@@ -72,9 +79,6 @@ class Config(dict):
         ConfigError: thrown if config has an invalid format.
     """
 
-    APPNAME = "dvc"
-    APPAUTHOR = "iterative"
-
     SYSTEM_LEVELS = ("system", "global")
     REPO_LEVELS = ("repo", "local")
     # In the order they shadow each other
@@ -84,7 +88,13 @@ class Config(dict):
     CONFIG_LOCAL = "config.local"
 
     def __init__(
-        self, dvc_dir=None, validate=True, fs=None, config=None
+        self,
+        dvc_dir: Optional["StrPath"] = None,
+        validate: bool = True,
+        fs: Optional["FileSystem"] = None,
+        config: Optional["DictStrAny"] = None,
+        remote: Optional[str] = None,
+        remote_config: Optional["DictStrAny"] = None,
     ):  # pylint: disable=super-init-not-called
         from dvc.fs import LocalFileSystem
 
@@ -92,31 +102,37 @@ class Config(dict):
         self.wfs = LocalFileSystem()
         self.fs = fs or self.wfs
 
-        if not dvc_dir:
-            try:
-                from dvc.repo import Repo
+        if dvc_dir:
+            self.dvc_dir = self.fs.path.abspath(dvc_dir)
 
-                self.dvc_dir = Repo.find_dvc_dir()
-            except NotDvcRepoError:
-                self.dvc_dir = None
-        else:
-            self.dvc_dir = self.fs.path.abspath(self.fs.path.realpath(dvc_dir))
+        self.load(
+            validate=validate, config=config, remote=remote, remote_config=remote_config
+        )
 
-        self.load(validate=validate, config=config)
+    @classmethod
+    def from_cwd(cls, fs: Optional["FileSystem"] = None, **kwargs):
+        from dvc.repo import Repo
+
+        try:
+            dvc_dir = Repo.find_dvc_dir(fs=fs)
+        except NotDvcRepoError:
+            dvc_dir = None
+
+        return cls(dvc_dir=dvc_dir, fs=fs, **kwargs)
 
     @classmethod
     def get_dir(cls, level):
-        from appdirs import site_config_dir, user_config_dir
+        from dvc.dirs import global_config_dir, system_config_dir
 
         assert level in ("global", "system")
 
         if level == "global":
-            return user_config_dir(cls.APPNAME, cls.APPAUTHOR)
+            return global_config_dir()
         if level == "system":
-            return site_config_dir(cls.APPNAME, cls.APPAUTHOR)
+            return system_config_dir()
 
     @cached_property
-    def files(self):
+    def files(self) -> Dict[str, str]:
         files = {
             level: os.path.join(self.get_dir(level), self.CONFIG)
             for level in ("system", "global")
@@ -139,10 +155,16 @@ class Config(dict):
             dvc.config.Config: config object.
         """
         config_file = os.path.join(dvc_dir, Config.CONFIG)
-        open(config_file, "w+", encoding="utf-8").close()
-        return Config(dvc_dir)
+        with open(config_file, "w+", encoding="utf-8"):
+            return Config(dvc_dir)
 
-    def load(self, validate=True, config=None):
+    def load(
+        self,
+        validate: bool = True,
+        config: Optional["DictStrAny"] = None,
+        remote: Optional[str] = None,
+        remote_config: Optional["DictStrAny"] = None,
+    ):
         """Loads config from all the config files.
 
         Raises:
@@ -157,32 +179,50 @@ class Config(dict):
             conf = self.validate(conf)
 
         self.clear()
-        self.update(conf)
 
-        # Add resolved default cache.dir
-        if not self["cache"].get("dir") and self.dvc_dir:
-            self["cache"]["dir"] = os.path.join(self.dvc_dir, "cache")
+        if remote:
+            conf["core"]["remote"] = remote
+
+        if remote_config:
+            remote = remote or conf["core"].get("remote")
+            if not remote:
+                raise ValueError("Missing remote name")
+
+            merge(conf, {"remote": {remote: remote_config}})
+
+        self.update(conf)
 
     def _get_fs(self, level):
         # NOTE: this might be a Gitfs, which doesn't see things outside of
         # the repo.
         return self.fs if level == "repo" else self.wfs
 
-    def _load_config(self, level):
-        from configobj import ConfigObj
+    @staticmethod
+    def load_file(path, fs=None) -> dict:
+        from configobj import ConfigObj, ConfigObjError
 
+        from dvc.fs import localfs
+
+        fs = fs or localfs
+
+        with fs.open(path) as fobj:
+            try:
+                conf_obj = ConfigObj(fobj)
+            except UnicodeDecodeError as exc:
+                raise ConfigError(str(exc)) from exc
+            except ConfigObjError as exc:
+                raise ConfigError(str(exc)) from exc
+
+        return _parse_named(_lower_keys(conf_obj.dict()))
+
+    def _load_config(self, level):
         filename = self.files[level]
         fs = self._get_fs(level)
 
-        if fs.exists(filename):
-            with fs.open(filename) as fobj:
-                try:
-                    conf_obj = ConfigObj(fobj)
-                except UnicodeDecodeError as exc:
-                    raise ConfigError(str(exc)) from exc
-        else:
-            conf_obj = ConfigObj()
-        return _parse_named(_lower_keys(conf_obj.dict()))
+        try:
+            return self.load_file(filename, fs=fs)
+        except FileNotFoundError:
+            return {}
 
     def _save_config(self, level, conf_dict):
         from configobj import ConfigObj
@@ -278,7 +318,7 @@ class Config(dict):
         return Schema(dirs_schema, extra=ALLOW_EXTRA)(conf)
 
     def load_config_to_level(self, level=None):
-        merged_conf = {}
+        merged_conf: Dict = {}
         for merge_level in self.LEVELS:
             if merge_level == level:
                 break
@@ -324,7 +364,7 @@ class Config(dict):
 
 
 def _parse_named(conf):
-    result = {"remote": {}, "machine": {}}
+    result: Dict[str, Dict] = {"remote": {}, "machine": {}}
 
     for section, val in conf.items():
         match = re_find(r'^\s*(remote|machine)\s*"(.*)"\s*$', section)
@@ -361,6 +401,5 @@ def merge(into, update):
 
 def _lower_keys(data):
     return {
-        k.lower(): _lower_keys(v) if isinstance(v, dict) else v
-        for k, v in data.items()
+        k.lower(): _lower_keys(v) if isinstance(v, dict) else v for k, v in data.items()
     }

dvc/config_schema.py

@@ -1,8 +1,10 @@
+import logging
 import os
 from urllib.parse import urlparse
 
-from funcy import walk_values
+from funcy import once, walk_values
 from voluptuous import (
+    REMOVE_EXTRA,
     All,
     Any,
     Coerce,
@@ -13,6 +15,8 @@ from voluptuous import (
     Schema,
 )
 
+logger = logging.getLogger(__name__)
+
 Bool = All(
     Lower,
     Any("true", "false"),
@@ -34,14 +38,12 @@ def supported_cache_type(types):
 
     unsupported = set(types) - {"reflink", "hardlink", "symlink", "copy"}
     if unsupported:
-        raise Invalid(
-            "Unsupported cache type(s): {}".format(", ".join(unsupported))
-        )
+        raise Invalid("Unsupported cache type(s): {}".format(", ".join(unsupported)))
 
     return types
 
 
-def Choices(*choices):
+def Choices(*choices):  # noqa: N802
     """Checks that value belongs to the specified set of values
 
     Args:
@@ -51,7 +53,7 @@ def Choices(*choices):
     return Any(*choices, msg="expected one of {}".format(", ".join(choices)))
 
 
-def ByUrl(mapping):
+def ByUrl(mapping):  # noqa: N802
     schemas = walk_values(Schema, mapping)
 
     def validate(data):
@@ -60,7 +62,9 @@ def ByUrl(mapping):
 
         parsed = urlparse(data["url"])
         # Windows absolute paths should really have scheme == "" (local)
-        if os.name == "nt" and len(parsed.scheme) == 1 and parsed.netloc == "":
+        if os.name == "nt" and len(parsed.scheme) == 1 and not parsed.netloc:
+            return schemas[""](data)
+        if not parsed.netloc:
             return schemas[""](data)
         if parsed.scheme not in schemas:
             raise Invalid(f"Unsupported URL type {parsed.scheme}://")
@@ -71,7 +75,28 @@ def ByUrl(mapping):
 
 
 class RelPath(str):
-    pass
+    __slots__ = ()
+
+
+class FeatureSchema(Schema):
+    def __init__(self, schema, required=False):
+        super().__init__(schema, required=required, extra=REMOVE_EXTRA)
+
+    @staticmethod
+    @once
+    def _log_deprecated(keys):
+        # only run this once per session
+        message = "%s config option%s unsupported"
+        paths = ", ".join(f"'feature.{key}'" for key in keys)
+        pluralize = " is" if len(keys) == 1 else "s are"
+        logger.warning(message, paths, pluralize)
+
+    def __call__(self, data):
+        ret = super().__call__(data)
+        extra_keys = data.keys() - ret.keys()
+        if extra_keys:
+            self._log_deprecated(sorted(extra_keys))
+        return ret
 
 
 REMOTE_COMMON = {
@@ -97,6 +122,8 @@ HTTP_COMMON = {
     "ask_password": Bool,
     "ssl_verify": Any(Bool, str),
     "method": str,
+    "connect_timeout": All(Coerce(float), Range(0, min_included=True)),
+    "read_timeout": All(Coerce(float), Range(0, min_included=True)),
     Optional("verify", default=False): Bool,
 }
 WEBDAV_COMMON = {
@@ -104,6 +131,7 @@ WEBDAV_COMMON = {
     "password": str,
     "ask_password": Bool,
     "token": str,
+    "custom_auth_header": str,
     "cert_path": str,
     "key_path": str,
     "timeout": Coerce(int),
@@ -122,16 +150,17 @@ SCHEMA = {
         Optional("autostage", default=False): Bool,
         Optional("experiments"): Bool,  # obsoleted
         Optional("check_update", default=True): Bool,
+        "site_cache_dir": str,
         "machine": Lower,
     },
     "cache": {
-        "local": str,
-        "s3": str,
-        "gs": str,
-        "hdfs": str,
-        "webhdfs": str,
-        "ssh": str,
-        "azure": str,
+        "local": str,  # obsoleted
+        "s3": str,  # obsoleted
+        "gs": str,  # obsoleted
+        "hdfs": str,  # obsoleted
+        "webhdfs": str,  # obsoleted
+        "ssh": str,  # obsoleted
+        "azure": str,  # obsoleted
         # This is for default local cache
         "dir": str,
         **LOCAL_COMMON,
@@ -186,6 +215,7 @@ SCHEMA = {
                     "timeout": Coerce(int),
                     "gss_auth": Bool,
                     "allow_agent": Bool,
+                    "max_sessions": Coerce(int),
                     Optional("verify", default=False): Bool,
                     **REMOTE_COMMON,
                 },
@@ -245,19 +275,17 @@ SCHEMA = {
         )
     },
     "state": {
-        "dir": str,
+        "dir": str,  # obsoleted
         "row_limit": All(Coerce(int), Range(1)),  # obsoleted
         "row_cleanup_quota": All(Coerce(int), Range(0, 100)),  # obsoleted
     },
     "index": {
-        "dir": str,
+        "dir": str,  # obsoleted
     },
     "machine": {
         str: {
             "cloud": All(Lower, Choices("aws", "azure")),
-            "region": All(
-                Lower, Choices("us-west", "us-east", "eu-west", "eu-north")
-            ),
+            "region": All(Lower, Choices("us-west", "us-east", "eu-west", "eu-north")),
             "image": str,
             "spot": Bool,
             "spot_price": Coerce(float),
@@ -270,11 +298,12 @@ SCHEMA = {
         },
     },
     # section for experimental features
-    "feature": {
-        Optional("machine", default=False): Bool,
-        # enabled by default. It's of no use, kept for backward compatibility.
-        Optional("parametrization", default=True): Bool,
-    },
+    # only specified keys are validated, others get logged and then ignored/removed
+    "feature": FeatureSchema(
+        {
+            Optional("machine", default=False): Bool,
+        },
+    ),
     "plots": {
         "html_template": str,
         Optional("auto_open", default=False): Bool,
@@ -298,4 +327,10 @@ SCHEMA = {
         "config_dir": str,
         "config_name": str,
     },
+    "studio": {
+        "token": str,
+        "url": str,
+        "repo_url": str,
+        Optional("offline", default=False): Bool,
+    },
 }

dvc/daemon.py

@@ -5,7 +5,7 @@ import logging
 import os
 import platform
 import sys
-from subprocess import Popen
+from subprocess import Popen  # nosec B404
 from typing import List
 
 from dvc.env import DVC_DAEMON
@@ -14,52 +14,74 @@ from dvc.utils import fix_env, is_binary
 logger = logging.getLogger(__name__)
 
 
-def _popen(cmd, **kwargs):
+def _suppress_resource_warning(popen: Popen):
+    """Sets the returncode to avoid ResourceWarning when popen is garbage collected."""
+    # only use for daemon processes.
+    # See https://bugs.python.org/issue38890.
+    popen.returncode = 0
+
+
+def _popen(cmd, **kwargs) -> Popen:
     prefix = [sys.executable]
     if not is_binary():
         main_entrypoint = os.path.join(
             os.path.abspath(os.path.dirname(__file__)), "__main__.py"
         )
         prefix += [main_entrypoint]
-    return Popen(prefix + cmd, close_fds=True, shell=False, **kwargs)
+    return Popen(
+        prefix + cmd, close_fds=True, shell=False, **kwargs  # nosec B603  # noqa: S603
+    )
 
 
 def _spawn_windows(cmd, env):
-    from subprocess import (
-        CREATE_NEW_PROCESS_GROUP,
-        CREATE_NO_WINDOW,
-        STARTF_USESHOWWINDOW,
-        STARTUPINFO,
-    )
+    if sys.platform == "win32":
+        from subprocess import (  # nosec B404
+            CREATE_NEW_PROCESS_GROUP,
+            CREATE_NO_WINDOW,
+            STARTF_USESHOWWINDOW,
+            STARTUPINFO,
+        )
 
-    # https://stackoverflow.com/a/7006424
-    # https://bugs.python.org/issue41619
-    creationflags = CREATE_NEW_PROCESS_GROUP | CREATE_NO_WINDOW
+        # https://stackoverflow.com/a/7006424
+        # https://bugs.python.org/issue41619
+        creationflags = CREATE_NEW_PROCESS_GROUP | CREATE_NO_WINDOW
 
-    startupinfo = STARTUPINFO()
-    startupinfo.dwFlags |= STARTF_USESHOWWINDOW
+        startupinfo = STARTUPINFO()
+        startupinfo.dwFlags |= STARTF_USESHOWWINDOW
 
-    _popen(cmd, env=env, creationflags=creationflags, startupinfo=startupinfo)
+        popen = _popen(
+            cmd, env=env, creationflags=creationflags, startupinfo=startupinfo
+        )
+        _suppress_resource_warning(popen)
 
 
 def _spawn_posix(cmd, env):
     from dvc.cli import main
 
+    # `fork` will copy buffers, so we need to flush them before forking.
+    # Otherwise, we will get duplicated outputs.
+    if sys.stdout and not sys.stdout.closed:
+        sys.stdout.flush()
+    if sys.stderr and not sys.stderr.closed:
+        sys.stderr.flush()
+
     # NOTE: using os._exit instead of sys.exit, because dvc built
     # with PyInstaller has trouble with SystemExit exception and throws
     # errors such as "[26338] Failed to execute script __main__"
     try:
-        pid = os.fork()  # pylint: disable=no-member
+        # pylint: disable-next=no-member
+        pid = os.fork()  # type: ignore[attr-defined]
         if pid > 0:
             return
     except OSError:
         logger.exception("failed at first fork")
         os._exit(1)  # pylint: disable=protected-access
 
-    os.setsid()  # pylint: disable=no-member
+    os.setsid()  # type: ignore[attr-defined]  # pylint: disable=no-member
 
     try:
-        pid = os.fork()  # pylint: disable=no-member
+        # pylint: disable-next=no-member
+        pid = os.fork()  # type: ignore[attr-defined]
         if pid > 0:
             os._exit(0)  # pylint: disable=protected-access
     except OSError:
@@ -69,6 +91,7 @@ def _spawn_posix(cmd, env):
     sys.stdin.close()
     sys.stdout.close()
     sys.stderr.close()
+    os.closerange(0, 3)
 
     if platform.system() == "Darwin":
         # workaround for MacOS bug
@@ -100,7 +123,7 @@ def daemon(args):
     Args:
         args (list): list of arguments to append to `dvc daemon` command.
     """
-    daemonize(["daemon", "-q"] + args)
+    daemonize(["daemon", "-q", *args])
 
 
 def daemonize(cmd: List[str]):