Custom header for dvc webdav (#8933)Fix https://github.com/iterative/dvc/issues/8931

* include custom auth header for webdav

* Revert "include custom auth header for webdav"

This reverts commit d2f2b2889b6bcf0429e4a28076f709a04642ae3a.

* include custom auth header for dvc webdav, ran unit tests

* update dvc-webdav version

.codecov.yml

@@ -1,10 +0,0 @@
-comment: false
-coverage:
-  status:
-    project:
-      default:
-        target: 90
-        threshold: 10%
-    patch:
-      default:
-        threshold: 25%

.coveragerc

@@ -1,16 +0,0 @@
-[run]
-branch = True
-source = dvc
-omit =
-    *__main__.py
-
-[report]
-exclude_lines =
-    if __name__ == .__main__.:
-    if typing.TYPE_CHECKING:
-    if TYPE_CHECKING:
-    pass
-    raise NotImplementedError
-    # pragma: no cover
-    #  pragma: no cover
-    \.\.\.$

.dvcignore

@@ -1,4 +1,3 @@
 /tests
 /dvc
 /.github
-/bin

.flake8

@@ -0,0 +1,19 @@
+[flake8]
+ignore=
+    # Whitespace before ':'
+    E203
+    # Too many leading '#' for block comment
+    E266
+    # Line break occurred before a binary operator
+    W503
+    # unindexed parameters in the str.format, see:
+    # https://pypi.org/project/flake8-string-format/
+    P1
+    # use `!r` instead of surrounding by quotes
+    B028
+max_line_length = 79
+max-complexity = 10
+select = B,C,E,F,W,T4,B902,T,P,TYP
+show_source = true
+count = true
+min_python_version = 3.8.0

.github/CODEOWNERS

@@ -1 +0,0 @@
-*       @iterative/dvc

.github/ISSUE_TEMPLATE/bug_report.md

@@ -8,7 +8,7 @@ about: Create a bug report to help us improve DVC
 <!--
 ## Issue name
 
-Issue names must follow the pattern `command: description` where the command is the dvc command that you are trying to run. The description should describe the consequence of the bug. 
+Issue names must follow the pattern `command: description` where the command is the dvc command that you are trying to run. The description should describe the consequence of the bug.
 
 Example: `repro: doesn't detect input changes`
 -->

.github/ISSUE_TEMPLATE/feature_request.md

@@ -2,4 +2,3 @@
 name: "\U0001F680 Feature Request"
 about: Suggest an idea for this project
 ---
-

.github/codecov.yml

@@ -0,0 +1,12 @@
+codecov:
+  notify:
+    wait_for_ci: true
+coverage:
+  status:
+    project:
+      default:
+        target: auto
+        threshold: 2%
+    patch: off
+github_checks:
+  annotations: false

.github/mergify.yml

@@ -1,9 +0,0 @@
-pull_request_rules:
-  - name: backport patches to 1.11
-    conditions:
-      - base=main
-      - label=backport-1.11
-    actions:
-      backport:
-        branches:
-          - "1.11"

.github/release-drafter.yml

@@ -1,49 +0,0 @@
-# Config for https://github.com/apps/release-drafter
-name-template: "$RESOLVED_VERSION 🦉 "
-tag-template: "$RESOLVED_VERSION"
-categories:
-  - title: "🚀 New Features and Enhancements "
-    labels:
-      - "feature"
-      - "enhancement"
-      - "ui"
-  - title: "💣 Breaking Changes "
-    labels:
-      - "breaking-change"
-  - title: "🏇 Optimizations "
-    labels:
-      - "optimize"
-      - "performance"
-  - title: "🐛 Bug Fixes "
-    labels:
-      - "bugfix"
-      - "bug"
-  - title: "🔨 Maintenance "
-    labels:
-      - "maintenance"
-      - "refactoring"
-      - "chore"
-      - "build"
-      - "ci"
-change-template: "- $TITLE (#$NUMBER) @$AUTHOR"
-version-resolver:
-  major:
-    labels:
-      - "major"
-  minor:
-    labels:
-      - "minor"
-  patch:
-    labels:
-      - "patch"
-  default: patch
-exclude-labels:
-  - "skip-changelog"
-template: |
-  > Refer to https://dvc.org/doc/install for installation instructions.
-
-  ## Changes
-
-  $CHANGES
-
-  Thanks again to $CONTRIBUTORS for the contributions! 🎉

.github/release.yml

@@ -0,0 +1,16 @@
+changelog:
+  exclude:
+    labels: ["skip-changelog"]
+  categories:
+    - title: 🛠 Breaking Changes
+      labels: ["breaking-change"]
+    - title: 🚀 New Features and Enhancements
+      labels: ["feature", "enhancement", "ui"]
+    - title: ⚡ Optimizations
+      labels: ["optimize", "performance"]
+    - title: 🐛 Bug Fixes
+      labels: ["bugfix", "bug"]
+    - title: 🔨 Maintenance
+      labels: ["maintenance", "refactoring", "chore", "build", "ci"]
+    - title: Other Changes
+      labels: ["*"]

.github/workflows/benchmarks.yaml

@@ -1,23 +1,18 @@
 name: benchmarks
 on: [pull_request, workflow_dispatch]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 jobs:
   bench:
     name: run benchmarks
-    runs-on: ${{ matrix.os }}
-    strategy:
-      fail-fast: false
-      matrix:
-        os: [ubuntu-18.04]
+    runs-on: ubuntu-latest
     steps:
-      - name: Cancel Previous Runs
-        uses: styfle/[email protected]
-        with:
-          access_token: ${{ github.token }}
       - uses: actions/setup-python@v4
         with:
-            python-version: 3.8
+            python-version: "3.11"
       - uses: iterative/dvc-bench@main
         with:
             pytest_options: "-k 'test_init or test_help'"
-

.github/workflows/codeql.yml

@@ -0,0 +1,39 @@
+name: "CodeQL"
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["main"]
+  schedule:
+    - cron: '32 19 * * 2'
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: ['python']
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v3
+
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v2
+      with:
+        languages: ${{ matrix.language }}
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v2

.github/workflows/packages.yaml

@@ -7,8 +7,13 @@ on:
     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:
@@ -24,26 +29,30 @@ jobs:
       with:
           fetch-depth: 0
 
-    - name: Set up Python 3.9
+    - name: Set up Python 3.10
       uses: actions/setup-python@v4
       with:
-        python-version: 3.9
+        python-version: "3.10"
         cache: pip
         cache-dependency-path: |
-          setup.cfg
+          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 -U wheel pip setuptools
+        pip install --upgrade pip wheel setuptools
         pip install .[all]
         pip install -r scripts/build-requirements.txt
-        gem install --no-document fpm
 
     - name: Pull images
       run: dvc pull
@@ -73,21 +82,31 @@ jobs:
       uses: actions/setup-python@v4
       with:
         python-version: 3.8
-        cache: pip
-        cache-dependency-path: setup.cfg
 
     - name: Install
+      run: pip install --upgrade pip wheel
+
+    - name: Force version for Test PyPI uploads
+      if: ${{ !startsWith(github.ref, 'refs/tags') }}
       run: |
-        pip install -U wheel pip build setuptools
-        pip install ".[all,tests]"
+        pip install setuptools_scm
+        echo version=$(python -m setuptools_scm | awk -F+ '{print $1}' | tail -1) >> $GITHUB_ENV
 
     - name: Build packages
-      run: |
-        pip install -U pip
-        ./scripts/build_package.sh
+      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

@@ -1,40 +1,21 @@
 name: Tests
 
 on:
-  pull_request: {}
-  push: {}
+  push:
+    branches: [main]
+  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:
+  contents: read
 
 jobs:
-  lint:
-    timeout-minutes: 10
-    runs-on: ubuntu-latest
-    steps:
-    - name: Cancel Previous Runs
-      uses: styfle/[email protected]
-      with:
-        access_token: ${{ github.token }}
-    - 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 requirements
-      run: |
-        pip install --upgrade pip setuptools wheel
-        pip install collective.checkdocs==0.2
-        pip install ".[dev]" pre-commit
-    - name: Check README
-      run: python setup.py checkdocs
-    - uses: pre-commit/[email protected]
   tests:
     timeout-minutes: 45
     runs-on: ${{ matrix.os }}
@@ -42,7 +23,8 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-20.04, windows-latest, macos-latest]
-        pyv: ["3.8", "3.9", "3.10"]
+        pyv: ["3.8", "3.9", "3.10", "3.11"]
+
     steps:
     - uses: actions/checkout@v3
       with:
@@ -51,39 +33,34 @@ jobs:
       uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.pyv }}
-    - name: get pip cache dir
-      id: pip-cache-dir
-      run: |
-        echo "::set-output name=dir::$(pip cache dir)"
-    - name: set pip cache
-      id: pip-cache
-      uses: actions/cache@v3
-      with:
-        path: ${{ steps.pip-cache-dir.outputs.dir }}
-        key: ${{ runner.os }}-pip-${{ hashFiles('setup.cfg') }}
-        restore-keys: |
-          ${{ runner.os }}-pip-
+        cache: pip
+        cache-dependency-path: pyproject.toml
     - name: install
-      if: steps.cache.pip-cache-dir.cache-hit != 'true'
       run: |
-        pip install --upgrade pip setuptools wheel
+        pip install --upgrade pip wheel
         pip install -e ".[dev]"
+    - uses: pre-commit/[email protected]
     - name: run tests
-      timeout-minutes: 40
-      run: >-
-        python -m tests -n=auto
-        --cov-report=xml --cov-report=term
-        ${{ env.extra_test_args }}
+      timeout-minutes: 30
+      run: >
+        pytest -nauto --timeout=300 --durations=100
+        --cov --cov-report=xml --cov-report=term
     - name: upload coverage report
       uses: codecov/codecov-action@v3
       with:
         file: ./coverage.xml
         fail_ci_if_error: false
+  check:
+    if: always()
+    needs: [tests]
+    runs-on: ubuntu-latest
+    steps:
+      - uses: re-actors/alls-green@release/v1
+        with:
+          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

@@ -1,39 +1,66 @@
+default_language_version:
+  python: python3
+
 ci:
   skip: [mypy, pylint, dvc-pre-commit]
 
 repos:
-  - hooks:
-      - id: black
-        language_version: python3
-    repo: https://github.com/ambv/black
-    rev: 22.6.0
   - 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
+      - id: check-executables-have-shebangs
+      - id: check-json
+      - id: check-merge-conflict
+        exclude: "tests/func/utils/test_strict_yaml.py"
+        args: ['--assume-in-merge']
       - id: check-toml
       - id: check-yaml
-  - hooks:
-      - id: codespell
-        args: 
-          - --ignore-words-list
-          - ba,datas,fo,uptodate,cachable
-    repo: https://github.com/codespell-project/codespell
-    rev: v2.1.0
-  - hooks:
+      - id: debug-statements
+        exclude: "dvc/_debug.py"
+      - id: end-of-file-fixer
+      - 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: v3.3.1
+    hooks:
+      - id: pyupgrade
+        args:
+          - --py38-plus
+  - repo: https://github.com/psf/black
+    rev: 22.12.0
+    hooks:
+      - id: black
+  - repo: https://github.com/PyCQA/isort
+    rev: 5.12.0
+    hooks:
       - id: isort
-        language_version: python3
-    repo: https://github.com/timothycrosley/isort
-    rev: 5.10.1
-  - hooks:
+  - repo: https://github.com/charliermarsh/ruff-pre-commit
+    rev: 'v0.0.238'
+    hooks:
+      - id: ruff
+  - repo: https://github.com/codespell-project/codespell
+    rev: v2.2.2
+    hooks:
+      - id: codespell
+        additional_dependencies: ["tomli"]
+  - repo: https://github.com/PyCQA/flake8
+    rev: 6.0.0
+    hooks:
       - id: flake8
-        language_version: python3
         additional_dependencies:
           - flake8-bugbear
           - flake8-comprehensions
           - flake8-debugger
           - flake8-string-format
-    repo: https://gitlab.com/pycqa/flake8
-    rev: 3.9.2
+          - flake8-typing-imports
   - repo: local
     hooks:
     - id: mypy
@@ -42,19 +69,14 @@ repos:
       files: ^dvc/
       language: system
       types: [python]
+      require_serial: true
     - id: pylint
       name: pylint
       entry: pylint
+      files: ^dvc/
       language: system
       types: [python]
-  - hooks:
-      - args:
-          - -i
-          - "2"
-        id: beautysh
-        language_version: python3
-    repo: https://github.com/lovesegfault/beautysh
-    rev: v6.2.1
+      require_serial: true
   - hooks:
       - args:
           - git-hook

CODE_OF_CONDUCT.md

@@ -74,4 +74,3 @@ available at https://www.contributor-covenant.org/version/1/4/code-of-conduct.ht
 
 For answers to common questions about this code of conduct, see
 https://www.contributor-covenant.org/faq
-

MANIFEST.in

@@ -1,3 +0,0 @@
-include LICENSE
-recursive-include requirements *.txt
-recursive-include dvc/repo/plots/templates *.json

README.rst

@@ -13,7 +13,7 @@
 
 |CI| |Python Version| |Coverage| |VS Code| |DOI|
 
-|PyPI| |Packages| |Brew| |Conda| |Choco| |Snap|
+|PyPI| |PyPI Downloads| |Packages| |Brew| |Conda| |Choco| |Snap|
 
 |
 
@@ -82,7 +82,7 @@ To share and back up the *data cache*, DVC supports multiple remote storage plat
 
 |Flowchart|
 
-`DVC pipelines <https://dvc.org/doc/start/data-management/pipelines>`_ (computational graphs) connect code and data together.
+`DVC pipelines <https://dvc.org/doc/start/data-management/data-pipelines>`_ (computational graphs) connect code and data together.
 They specify all steps required to produce a model: input dependencies including code, data, commands to run; and output information to be saved.
 
 Last but not least, `DVC Experiment Versioning <https://dvc.org/doc/start/experiments>`_ lets you prepare and run a large number of experiments.
@@ -276,6 +276,10 @@ 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
 
+.. |PyPI Downloads| image:: https://img.shields.io/pypi/dm/dvc.svg?color=blue&label=Downloads&logo=pypi&logoColor=gold
+   :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
    :alt: deb|pkg|rpm|exe
@@ -292,6 +296,6 @@ Barrak, A., Eghan, E.E. and Adams, B. `On the Co-evolution of ML Pipelines and S
    :target: https://github.com/iterative/dvc/graphs/contributors
    :alt: Contributors
 
-.. |VS Code| image:: https://vsmarketplacebadge.apphb.com/version/Iterative.dvc.svg
+.. |VS Code| image:: https://img.shields.io/visual-studio-marketplace/v/Iterative.dvc?color=blue&label=VSCode&logo=visualstudiocode&logoColor=blue
    :target: https://marketplace.visualstudio.com/items?itemName=Iterative.dvc
    :alt: VS Code Extension

bin/dvc

@@ -1,3 +0,0 @@
-#!/bin/bash
-
-PYTHONPATH=$DVC_HOME python -m dvc $@

bin/dvc.bat

@@ -1,3 +0,0 @@
-@echo OFF
-set PYTHONPATH=%DVC_HOME%
-python -m dvc %*

dvc/__init__.py

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

dvc/_debug.py

@@ -1,24 +1,28 @@
 from contextlib import ExitStack, contextmanager
 from datetime import datetime
-from typing import TYPE_CHECKING, Callable, Union
+from typing import TYPE_CHECKING, Callable, Optional, Union
 
 if TYPE_CHECKING:
     from argparse import Namespace
+    from types import FrameType
 
 
 @contextmanager
 def viztracer_profile(
     path: Union[Callable[[], str], str],
-    max_stack_depth: int = -1,
+    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(  # noqa: T201
+            "Failed to run profiler, viztracer is not installed"
+        )
         yield
         return
 
-    tracer = viztracer.VizTracer(max_stack_depth=max_stack_depth)
+    tracer = viztracer.VizTracer(max_stack_depth=depth, log_async=log_async)
 
     tracer.start()
     yield
@@ -29,12 +33,14 @@ def viztracer_profile(
 
 @contextmanager
 def yappi_profile(
-    path: Union[Callable[[], str], str] = None, wall_clock: bool = True
+    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
 
@@ -44,14 +50,26 @@ def yappi_profile(
     yield
     yappi.stop()
 
-    # pylint:disable=no-member
-    if path:
-        stats = yappi.get_func_stats()
-        fpath = path() if callable(path) else path
-        stats.save(fpath, "callgrind")
+    threads = yappi.get_thread_stats()
+    stats = {}
+    if separate_threads:
+        for thread in threads:
+            ctx_id = thread.id
+            stats[ctx_id] = yappi.get_func_stats(ctx_id=ctx_id)
     else:
-        yappi.get_func_stats().print_all()
-        yappi.get_thread_stats().print_all()
+        stats[None] = yappi.get_func_stats()
+
+    fpath = path() if callable(path) else path
+    for ctx_id, st in stats.items():
+        if fpath:
+            out = f"{fpath}-{ctx_id}" if ctx_id is not None else fpath
+            st.save(out, type="callgrind")
+        else:
+            if ctx_id is not None:
+                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
 
     yappi.clear_stats()
 
@@ -62,7 +80,9 @@ 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(  # noqa: T201
+            "Failed to run profiler, pyinstrument is not installed"
+        )
         yield
         return
 
@@ -75,11 +95,11 @@ 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
 
@@ -103,14 +123,49 @@ 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
+
+    lines = "\u2015" * get_terminal_size().columns
+    stack = format_stack(frame)
+    print(lines, "\n", *stack, lines, sep="", file=sys.stderr)  # noqa: T201
+
+
 @contextmanager
-def debugtools(args: "Namespace" = None, **kwargs):
+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)
+
+    try:
+        signal.signal(signal.SIGINFO, _sigshow)  # only available on macOS
+    except AttributeError:
+        pass
+    yield
+
+
+def _get_path_func(tool: str, ext: str):
+    fmt = f"{tool}.dvc-{{now:%Y%m%d}}_{{now:%H%M%S}}.{ext}"
+
+    def func(now: Optional["datetime"] = None) -> str:
+        return fmt.format(now=now or datetime.now())
+
+    return func
+
+
+@contextmanager
+def debugtools(args: Optional["Namespace"] = None, **kwargs):
     kw = vars(args) if args else {}
     kw.update(kwargs)
 
@@ -121,19 +176,28 @@ def debugtools(args: "Namespace" = None, **kwargs):
             stack.enter_context(profile(kw.get("cprofile_dump")))
         if kw.get("instrument") or kw.get("instrument_open"):
             stack.enter_context(instrument(kw.get("instrument_open", False)))
+        if kw.get("show_stack", False):
+            stack.enter_context(show_stack())
         if kw.get("yappi"):
-            output = "callgrind.dvc-{0:%Y%m%d}_{0:%H%M%S}.out"
+            path_func = _get_path_func("callgrind", "out")
             stack.enter_context(
-                yappi_profile(path=lambda: output.format(datetime.now()))
-            )
-        if kw.get("viztracer") or kw.get("viztracer_depth"):
-            output = "viztracer.dvc-{0:%Y%m%d}_{0:%H%M%S}.json"
-            stack.enter_context(
-                viztracer_profile(
-                    path=lambda: output.format(datetime.now()),
-                    max_stack_depth=kw.get("viztracer_depth") or -1,
+                yappi_profile(
+                    path=path_func,
+                    separate_threads=kw.get("yappi_separate_threads"),
                 )
             )
+        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
+            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
 
 
@@ -146,10 +210,19 @@ def add_debugging_flags(parser):
     parser.add_argument(
         "--yappi", action="store_true", default=False, help=SUPPRESS
     )
+    parser.add_argument(
+        "--yappi-separate-threads",
+        action="store_true",
+        default=False,
+        help=SUPPRESS,
+    )
     parser.add_argument(
         "--viztracer", action="store_true", default=False, help=SUPPRESS
     )
     parser.add_argument("--viztracer-depth", type=int, help=SUPPRESS)
+    parser.add_argument(
+        "--viztracer-async", action="store_true", default=False, help=SUPPRESS
+    )
     parser.add_argument("--cprofile-dump", help=SUPPRESS)
     parser.add_argument(
         "--pdb", action="store_true", default=False, help=SUPPRESS
@@ -160,3 +233,10 @@ def add_debugging_flags(parser):
     parser.add_argument(
         "--instrument-open", action="store_true", default=False, help=SUPPRESS
     )
+    parser.add_argument(
+        "--show-stack",
+        "--ss",
+        action="store_true",
+        default=False,
+        help=SUPPRESS,
+    )

dvc/analytics.py

@@ -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
 
@@ -102,15 +101,24 @@ def _runtime_info():
     """
     Gather information from the environment where DVC runs to fill a report.
     """
+    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,
     }
 
 
@@ -123,7 +131,7 @@ def _system_info():
     system = platform.system()
 
     if system == "Windows":
-        version = sys.getwindowsversion()
+        version = sys.getwindowsversion()  # type: ignore[attr-defined]
 
         return {
             "os": "windows",
@@ -146,45 +154,3 @@ def _system_info():
 
     # We don't collect data for any other system.
     raise NotImplementedError
-
-
-def _find_or_create_user_id():
-    """
-    The user's ID is stored on a file under the global config directory.
-
-    The file should contain a JSON with a "user_id" key:
-
-        {"user_id": "16fd2706-8baf-433b-82eb-8c7fada847da"}
-
-    IDs are generated randomly with UUID.
-    """
-    import uuid
-
-    from dvc.config import Config
-    from dvc.lock import Lock, LockError
-    from dvc.utils.fs import makedirs
-
-    config_dir = Config.get_dir("global")
-    fname = os.path.join(config_dir, "user_id")
-    lockfile = os.path.join(config_dir, "user_id.lock")
-
-    # Since the `fname` and `lockfile` are under the global config,
-    # we need to make sure such directory exist already.
-    makedirs(config_dir, exist_ok=True)
-
-    try:
-        with Lock(lockfile):
-            try:
-                with open(fname, encoding="utf-8") as fobj:
-                    user_id = json.load(fobj)["user_id"]
-
-            except (FileNotFoundError, ValueError, KeyError):
-                user_id = str(uuid.uuid4())
-
-                with open(fname, "w", encoding="utf-8") as fobj:
-                    json.dump({"user_id": user_id}, fobj)
-
-            return user_id
-
-    except LockError:
-        logger.debug("Failed to acquire '%s'", lockfile)

dvc/annotations.py

@@ -0,0 +1,35 @@
+from dataclasses import asdict, dataclass, field, fields
+from typing import Any, ClassVar, Dict, List, Optional
+
+from funcy import compact
+
+
+@dataclass
+class Annotation:
+    PARAM_DESC: ClassVar[str] = "desc"
+    PARAM_TYPE: ClassVar[str] = "type"
+    PARAM_LABELS: ClassVar[str] = "labels"
+    PARAM_META: ClassVar[str] = "meta"
+
+    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 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))
+
+
+ANNOTATION_FIELDS = [field.name for field in fields(Annotation)]
+ANNOTATION_SCHEMA = {
+    Annotation.PARAM_DESC: str,
+    Annotation.PARAM_TYPE: str,
+    Annotation.PARAM_LABELS: [str],
+    Annotation.PARAM_META: object,
+}

dvc/api/__init__.py

@@ -1,9 +1,15 @@
-from .data import (  # noqa, pylint: disable=redefined-builtin
-    get_url,
-    open,
-    read,
-)
+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
 
-__all__ = ["get_url", "make_checkpoint", "open", "params_show", "read"]
+__all__ = [
+    "get_url",
+    "make_checkpoint",
+    "open",
+    "params_show",
+    "read",
+    "DVCFileSystem",
+]

dvc/api/data.py

@@ -27,7 +27,7 @@ def get_url(path, repo=None, rev=None, remote=None):
         if not dvc_info:
             raise OutputNotFoundError(path, repo)
 
-        dvc_repo = info["repo"]
+        dvc_repo = info["repo"]  # pylint: disable=unsubscriptable-object
         md5 = dvc_info["md5"]
 
         return dvc_repo.cloud.get_url_for(remote, checksum=md5)
@@ -38,7 +38,11 @@ class _OpenContextManager(GCM):
         self, func, args, kwds
     ):  # pylint: disable=super-init-not-called
         self.gen = func(*args, **kwds)
-        self.func, self.args, self.kwds = func, args, kwds
+        self.func, self.args, self.kwds = (  # type: ignore[assignment]
+            func,
+            args,
+            kwds,
+        )
 
     def __getattr__(self, name):
         raise AttributeError(

dvc/api/params.py

@@ -1,3 +1,4 @@
+import typing
 from collections import Counter
 from typing import Dict, Iterable, Optional, Union
 
@@ -37,6 +38,10 @@ def params_show(
             stages to retrieve parameters from.
             Defaults to `None`.
             If `None`, all parameters from all stages will be retrieved.
+            If this method is called from a different location to the one where
+            the `dvc.yaml` is found, the relative path to the `dvc.yaml` must
+            be provided as a prefix with the syntax `{relpath}:{stage}`.
+            For example: `subdir/dvc.yaml:stage-0` or `../dvc.yaml:stage-1`.
         rev (str, optional): Name of the `Git revision`_ to retrieve parameters
             from.
             Defaults to `None`.
@@ -234,15 +239,15 @@ def params_show(
     if isinstance(stages, str):
         stages = [stages]
 
-    def _onerror_raise(result: Dict, exception: Exception, *args, **kwargs):
+    def _onerror_raise(_result: Dict, exception: Exception, *args, **kwargs):
         raise exception
 
     def _postprocess(params):
-        processed = {}
+        processed: Dict[str, Dict] = {}
         for rev, rev_data in params.items():
             processed[rev] = {}
 
-            counts = Counter()
+            counts: typing.Counter[str] = Counter()
             for file_data in rev_data["data"].values():
                 for k in file_data["data"]:
                     counts[k] += 1

dvc/cli/__init__.py

@@ -45,7 +45,6 @@ def _log_unknown_exceptions() -> None:
     if logger.isEnabledFor(logging.DEBUG):
         logger.debug("Version info for developers:\n%s", get_dvc_info())
     logger.info(FOOTER)
-    return None
 
 
 def _log_exceptions(exc: Exception) -> Optional[int]:
@@ -58,8 +57,8 @@ 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")),
+                "%s to see how to handle this problem",
+                error_link("many-files"),
                 extra={"tb_only": True},
             )
         else:
@@ -92,8 +91,11 @@ 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 +104,9 @@ 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
@@ -114,14 +118,17 @@ 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
 
-    from dvc_data.build import IgnoreInCollectedDirError
+    from dvc_data.hashfile.build import IgnoreInCollectedDirError
 
     if isinstance(exc, IgnoreInCollectedDirError):
         logger.exception("")
@@ -168,12 +175,27 @@ 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 __version__
+            from dvc.utils.pkg import PKG
+
+            pyv = " ".join([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

dvc/cli/actions.py

@@ -0,0 +1,24 @@
+from argparse import _AppendAction
+
+
+class CommaSeparatedArgs(_AppendAction):  # pylint: disable=protected-access
+    def __call__(
+        self, parser, namespace, values, option_string=None  # noqa: ARG002
+    ):
+        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  # noqa: ARG002
+    ):
+        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

@@ -2,8 +2,8 @@
 import argparse
 import logging
 import os
-import sys
 
+from dvc import __version__
 from dvc.commands import (
     add,
     cache,
@@ -29,6 +29,7 @@ from dvc.commands import (
     init,
     install,
     ls,
+    ls_url,
     machine,
     metrics,
     move,
@@ -75,6 +76,7 @@ COMMANDS = [
     install,
     root,
     ls,
+    ls_url,
     freeze,
     dag,
     daemon,
@@ -126,17 +128,6 @@ class DvcParser(argparse.ArgumentParser):
         return args
 
 
-class VersionAction(argparse.Action):  # pragma: no cover
-    # pylint: disable=too-few-public-methods
-    """Shows DVC version and exits."""
-
-    def __call__(self, parser, namespace, values, option_string=None):
-        from dvc import __version__
-
-        print(__version__)
-        sys.exit(0)
-
-
 def get_parent_parser():
     """Create instances of a parser containing common arguments shared among
     all the commands.
@@ -184,13 +175,11 @@ def get_main_parser():
         help="Show this help message and exit.",
     )
 
-    # NOTE: On some python versions action='version' prints to stderr
-    # instead of stdout https://bugs.python.org/issue18920
     parser.add_argument(
         "-V",
         "--version",
-        action=VersionAction,
-        nargs=0,
+        action="version",
+        version=__version__,
         help="Show program's version.",
     )
 

dvc/cli/utils.py

@@ -21,10 +21,13 @@ def append_doc_link(help_message, path):
     )
 
 
-def fix_plumbing_subparsers(subparsers):
-    # metavar needs to be explicitly set in order to hide plumbing subcommands
+def hide_subparsers_from_help(subparsers):
+    # metavar needs to be explicitly set in order to hide subcommands
     # from the 'positional arguments' choices list
     # see: https://bugs.python.org/issue22848
+    # 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
     ]

dvc/commands/add.py

@@ -2,12 +2,43 @@ 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 run(self):
         from dvc.exceptions import (
@@ -28,6 +59,9 @@ class CmdAdd(CmdBase):
                 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,
@@ -109,15 +143,8 @@ def add_parser(subparsers, parent_parser):
         ),
         metavar="<number>",
     )
-    parser.add_argument(
-        "--desc",
-        type=str,
-        metavar="<text>",
-        help=(
-            "User description of the data (optional). "
-            "This doesn't affect any DVC operations."
-        ),
-    )
+
+    _add_annotating_args(parser)
     parser.add_argument(
         "targets", nargs="+", help="Input files/directories to add."
     ).complete = completion.FILE

dvc/commands/cache.py

@@ -42,7 +42,7 @@ 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)

dvc/commands/check_ignore.py

@@ -103,7 +103,7 @@ def add_parser(subparsers, parent_parser):
         "--all",
         action="store_true",
         default=False,
-        help="Include the target paths which don’t match any pattern "
+        help="Include the target paths which don't match any pattern "
         "in the `--details` list.",
     )
     parser.add_argument(
@@ -111,7 +111,7 @@ def add_parser(subparsers, parent_parser):
         "--non-matching",
         action="store_true",
         default=False,
-        help="Include the target paths which don’t match any pattern "
+        help="Include the target paths which don't match any pattern "
         "in the `--details` list.",
     )
     parser.add_argument(

dvc/commands/checkout.py

@@ -110,7 +110,7 @@ def add_parser(subparsers, parent_parser):
         nargs="*",
         help=(
             "Limit command scope to these tracked files/directories, "
-            ".dvc files, or stage names."
+            ".dvc files and stage names."
         ),
     ).complete = completion.DVC_FILE
     checkout_parser.set_defaults(func=CmdCheckout)

dvc/commands/commit.py

@@ -25,9 +25,7 @@ class CmdCommit(CmdBase):
                 )
             except DvcException:
                 logger.exception(
-                    "failed to commit{}".format(
-                        (" " + target) if target else ""
-                    )
+                    "failed to commit%s", (" " + target) if target else ""
                 )
                 return 1
         return 0
@@ -70,7 +68,9 @@ def add_parser(subparsers, parent_parser):
     commit_parser.add_argument(
         "targets",
         nargs="*",
-        help="stages or .dvc files to commit. Optional. "
-        "(Finds all DVC files in the workspace by default.)",
+        help=(
+            "Limit command scope to these tracked files/directories, "
+            ".dvc files and stage names."
+        ),
     ).complete = completion.DVCFILES_AND_STAGE
     commit_parser.set_defaults(func=CmdCommit)

dvc/commands/config.py

@@ -37,13 +37,12 @@ class CmdConfig(CmdBaseNoRepo):
         self.config = Config(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()

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

@@ -204,7 +204,7 @@ def add_parser(subparsers, parent_parser):
     dag_parser.add_argument(
         "target",
         nargs="?",
-        help="Stage or output to show pipeline for (optional). "
+        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

@@ -1,11 +1,18 @@
 import argparse
 import logging
-from typing import TYPE_CHECKING
+from operator import itemgetter
+from typing import TYPE_CHECKING, Any, Dict, Iterable, Set
 
 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
+from dvc.cli.utils import (
+    append_doc_link,
+    fix_subparsers,
+    hide_subparsers_from_help,
+)
 from dvc.ui import ui
 from dvc.utils import colorize
 
@@ -31,15 +38,22 @@ class CmdDataStatus(CmdBase):
         "unchanged": "DVC unchanged files",
     }
     HINTS = {
-        "not_in_cache": 'use "dvc pull <file>..." '
-        "to update your local storage",
-        "committed": "git commit the corresponding dvc files "
-        "to update the repo",
-        "uncommitted": 'use "dvc commit <file>..." to track changes',
-        "untracked": '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',
+        "not_in_cache": ('use "dvc fetch <file>..." to download files',),
+        "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',
+        ),
+        "git_dirty": (
+            "there are {}changes not tracked by dvc, "
+            'use "git status" to see',
+        ),
     }
 
     @staticmethod
@@ -58,7 +72,7 @@ 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:
@@ -76,8 +90,9 @@ class CmdDataStatus(CmdBase):
             color = cls.COLORS.get(stage, None)
 
             ui.write(header)
-            if hint := cls.HINTS.get(stage):
-                ui.write(f"  ({hint})")
+            if hints := cls.HINTS.get(stage):
+                for hint in hints:
+                    ui.write(f"  ({hint})")
 
             if isinstance(stage_status, dict):
                 items = [
@@ -92,17 +107,19 @@ class CmdDataStatus(CmdBase):
                 out = "\n".join(tabs + item for item in chunk)
                 ui.write(colorize(out, color))
 
-        if (hint := cls.HINTS.get("git_dirty")) and git_info.get("is_dirty"):
-            message = hint.format("other " if result else "")
-            ui.write(f"[blue]({message})[/]", styled=True)
+        if (hints := cls.HINTS.get("git_dirty")) and git_info.get("is_dirty"):
+            for hint in hints:
+                message = hint.format("other " if result else "")
+                ui.write(f"[blue]({message})[/]", styled=True)
         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,
-                with_dirs=self.args.with_dirs,
             )
 
         if not self.args.unchanged:
@@ -116,6 +133,65 @@ 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",
@@ -172,10 +248,52 @@ def add_parser(subparsers, parent_parser):
         nargs="?",
         help="Show untracked files.",
     )
-    data_status_parser.add_argument(
-        "--with-dirs",
+    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=argparse.SUPPRESS,
+        help="Show tabulated output in the Markdown format (GFM).",
     )
-    data_status_parser.set_defaults(func=CmdDataStatus)
+    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

@@ -43,7 +43,8 @@ class CmdDataPull(CmdDataBase):
             )
             self.log_summary(stats)
         except (CheckoutError, DvcException) as exc:
-            self.log_summary(getattr(exc, "stats", {}))
+            if stats := getattr(exc, "stats", {}):
+                self.log_summary(stats)
             logger.exception("failed to pull data from the cloud")
             return 1
 
@@ -119,9 +120,9 @@ def shared_parent_parser():
         nargs="*",
         help=(
             "Limit command scope to these tracked files/directories, "
-            ".dvc files, or stage names."
+            ".dvc files and stage names."
         ),
-    ).complete = completion.DVC_FILE
+    ).complete = completion.DVC_FILE  # type: ignore[attr-defined]
 
     return parent_parser
 
@@ -194,7 +195,7 @@ def add_parser(subparsers, _parent_parser):
         "--glob",
         action="store_true",
         default=False,
-        help="Pull cache for targets matching shell-style wildcards.",
+        help=argparse.SUPPRESS,
     )
     pull_parser.set_defaults(func=CmdDataPull)
 
@@ -301,7 +302,7 @@ 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",

dvc/commands/diff.py

@@ -109,7 +109,7 @@ class CmdDiff(CmdBase):
             ui.write()
 
         if not sum(summary.values()):
-            return None
+            return
 
         states_summary = ", ".join(
             f"{summary[state]} {state}"

dvc/commands/experiments/__init__.py

@@ -2,8 +2,8 @@ import argparse
 
 from dvc.cli.utils import (
     append_doc_link,
-    fix_plumbing_subparsers,
     fix_subparsers,
+    hide_subparsers_from_help,
 )
 from dvc.commands.experiments import (
     apply,
@@ -18,6 +18,7 @@ from dvc.commands.experiments import (
     queue_worker,
     remove,
     run,
+    save,
     show,
 )
 
@@ -34,6 +35,7 @@ SUB_COMMANDS = [
     queue_worker,
     remove,
     run,
+    save,
     show,
 ]
 
@@ -59,7 +61,7 @@ def add_parser(subparsers, parent_parser):
     fix_subparsers(experiments_subparsers)
     for cmd in SUB_COMMANDS:
         cmd.add_parser(experiments_subparsers, parent_parser)
-    fix_plumbing_subparsers(experiments_subparsers)
+    hide_subparsers_from_help(experiments_subparsers)
 
 
 def add_rev_selection_flags(

dvc/commands/experiments/diff.py

@@ -27,7 +27,7 @@ class CmdExperimentsDiff(CmdBase):
 
         if self.args.json:
             ui.write_json(diff)
-        else:
+        elif diff:
             from dvc.compare import show_diff
 
             precision = self.args.precision or DEFAULT_PRECISION

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.ui import ui
 
 logger = logging.getLogger(__name__)
 
@@ -16,18 +17,13 @@ class CmdExperimentsList(CmdBase):
             num=self.args.num,
             git_remote=self.args.git_remote,
         )
+
         for baseline in exps:
-            tag = self.repo.scm.describe(baseline)
-            if not tag:
-                branch = self.repo.scm.describe(baseline, base="refs/heads")
-                if branch:
-                    tag = branch.split("/")[-1]
-            name = tag if tag else baseline[:7]
             if not name_only:
-                print(f"{name}:")
+                ui.write(f"{baseline}:")
             for exp_name in exps[baseline]:
                 indent = "" if name_only else "\t"
-                print(f"{indent}{exp_name}")
+                ui.write(f"{indent}{exp_name}")
 
         return 0
 

dvc/commands/experiments/pull.py

@@ -68,7 +68,7 @@ def add_parser(experiments_subparsers, parent_parser):
         "-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",

dvc/commands/experiments/save.py

@@ -0,0 +1,79 @@
+import argparse
+import logging
+
+from dvc.cli.command import CmdBase
+from dvc.cli.utils import append_doc_link
+from dvc.exceptions import DvcException
+from dvc.ui import ui
+
+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,
+            )
+        except DvcException:
+            logger.exception("failed to save experiment")
+            return 1
+
+        if self.args.json:
+            ui.write_json({"ref": ref})
+        else:
+            name = self.repo.experiments.get_exact_name([ref])[ref]
+            ui.write(f"Experiment has been saved as: {name}")
+            ui.write(
+                "\nTo promote an experiment to a Git branch run:\n\n"
+                "\tdvc exp branch <exp> <branch>\n"
+            )
+
+        return 0
+
+
+def add_parser(experiments_subparsers, parent_parser):
+    EXPERIMENTS_SAVE_HELP = "Save current workspace as a dvc experiment."
+    save_parser = experiments_subparsers.add_parser(
+        "save",
+        parents=[parent_parser],
+        description=append_doc_link(EXPERIMENTS_SAVE_HELP, "exp/save"),
+        help=EXPERIMENTS_SAVE_HELP,
+        formatter_class=argparse.RawDescriptionHelpFormatter,
+    )
+    save_parser.add_argument(
+        "-f",
+        "--force",
+        action="store_true",
+        default=False,
+        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.",
+    )
+    save_parser.add_argument(
+        "-n",
+        "--name",
+        default=None,
+        help=(
+            "Human-readable experiment name. If not specified, a name will "
+            "be auto-generated."
+        ),
+        metavar="<name>",
+    )
+    save_parser.add_argument(
+        "-I",
+        "--include-untracked",
+        action="append",
+        default=[],
+        help="List of untracked paths to include in the experiment.",
+        metavar="<path>",
+    )
+    save_parser.set_defaults(func=CmdExperimentsSave)

dvc/commands/experiments/show.py

@@ -4,7 +4,7 @@ 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, Any, Dict, Set
 
 from funcy import lmap
 
@@ -37,9 +37,9 @@ def _update_names(names, items):
 
 
 def _collect_names(all_experiments, **kwargs):
-    metric_names = defaultdict(dict)
-    param_names = defaultdict(dict)
-    deps_names = set()
+    metric_names: Dict[str, Dict[str, Any]] = defaultdict(dict)
+    param_names: Dict[str, Dict[str, Any]] = defaultdict(dict)
+    deps_names: Set[str] = set()
 
     for _, experiments in all_experiments.items():
         for exp_data in experiments.values():
@@ -62,7 +62,7 @@ experiment_types = {
 }
 
 
-def _collect_rows(
+def _collect_rows(  # noqa: C901
     base_rev,
     experiments,
     all_headers,
@@ -77,7 +77,7 @@ def _collect_rows(
     fill_value=FILL_VALUE,
     iso=False,
 ):
-    from scmrepo.git import Git
+    from dvc.scm import Git
 
     if sort_by:
         sort_path, sort_name, sort_type = _sort_column(
@@ -95,11 +95,8 @@ def _collect_rows(
 
         exp = results.get("data", {})
 
-        if exp.get("running"):
-            state = "Running"
-        elif exp.get("queued"):
-            state = "Queued"
-        else:
+        state = exp.get("status")
+        if state == "Success":
             state = fill_value
 
         is_baseline = rev == "baseline"
@@ -317,7 +314,7 @@ def baseline_styler(typ):
     return {"style": "bold"} if typ == "baseline" else {}
 
 
-def show_experiments(
+def show_experiments(  # noqa: C901
     all_experiments,
     keep=None,
     drop=None,
@@ -331,7 +328,7 @@ def show_experiments(
 
     metric_names, param_names, deps_names = _collect_names(all_experiments)
 
-    headers = [
+    headers_list = [
         "Experiment",
         "rev",
         "typ",
@@ -343,13 +340,13 @@ def show_experiments(
 
     names = {**metric_names, **param_names}
     counter = Counter(flatten_list([list(a.keys()) for a in names.values()]))
-    counter.update(headers)
+    counter.update(headers_list)
     metric_headers = _normalize_headers(metric_names, counter)
     param_headers = _normalize_headers(param_names, counter)
 
     td = experiments_table(
         all_experiments,
-        headers,
+        headers_list,
         metric_headers,
         metric_names,
         param_headers,
@@ -362,7 +359,7 @@ def show_experiments(
         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)
 
@@ -413,13 +410,15 @@ def show_experiments(
 
     cols_to_drop = set()
     if drop is not None:
-        cols_to_drop = {col for col in td.keys() if re.match(drop, col)}
+        cols_to_drop = {
+            col for col in td.keys() if re.match(drop, col)  # noqa: SIM118
+        }
     if pcp:
         cols_to_drop.add("Created")
     td.drop(*cols_to_drop)
 
     if pcp:
-        subset = {x for x in td.keys() if x != "Experiment"}
+        subset = {x for x in td.keys() if x != "Experiment"}  # noqa: SIM118
         td.dropna(
             "rows",
             how="all",
@@ -476,6 +475,8 @@ class CmdExperimentsShow(CmdBase):
                 all_branches=self.args.all_branches,
                 all_tags=self.args.all_tags,
                 all_commits=self.args.all_commits,
+                hide_queued=self.args.hide_queued,
+                hide_failed=self.args.hide_failed,
                 revs=self.args.rev,
                 num=self.args.num,
                 sha_only=self.args.sha,
@@ -495,7 +496,7 @@ class CmdExperimentsShow(CmdBase):
                 else DEFAULT_PRECISION
             )
             fill_value = "" if self.args.csv else FILL_VALUE
-            iso = True if self.args.csv else False
+            iso = self.args.csv
 
             show_experiments(
                 all_experiments,
@@ -594,6 +595,18 @@ def add_parser(experiments_subparsers, parent_parser):
         default=False,
         help="Always show git commit SHAs instead of branch/tag names.",
     )
+    experiments_show_parser.add_argument(
+        "--hide-failed",
+        action="store_true",
+        default=False,
+        help="Hide failed experiments in the table.",
+    )
+    experiments_show_parser.add_argument(
+        "--hide-queued",
+        action="store_true",
+        default=False,
+        help="Hide queued experiments in the table.",
+    )
     experiments_show_parser.add_argument(
         "--json",
         "--show-json",

dvc/commands/gc.py

@@ -10,7 +10,7 @@ logger = logging.getLogger(__name__)
 
 
 class CmdGC(CmdBase):
-    def run(self):
+    def run(self):  # noqa: C901
         from dvc.repo.gc import _validate_args
 
         _validate_args(

dvc/commands/get.py

@@ -3,9 +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
+from dvc.scm import CloneError
 
 logger = logging.getLogger(__name__)
 
@@ -44,11 +44,12 @@ class CmdGet(CmdBaseNoRepo):
                 jobs=self.args.jobs,
             )
             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
 

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__)
 
 

dvc/commands/git_hook.py

@@ -64,17 +64,17 @@ 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)
+            our.merge(ancestor, their, allowed=["add", "remove", "change"])
 
             return 0
         finally:

dvc/commands/imp.py

@@ -5,6 +5,7 @@ from dvc.cli import completion
 from dvc.cli.command import CmdBase
 from dvc.cli.utils import append_doc_link
 from dvc.exceptions import DvcException
+from dvc.scm import CloneError
 
 logger = logging.getLogger(__name__)
 
@@ -19,20 +20,29 @@ class CmdImport(CmdBase):
                 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,
             )
+        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."
@@ -69,20 +79,19 @@ def add_parser(subparsers, parent_parser):
         help="Specify name of the .dvc file this command will generate.",
         metavar="<filename>",
     )
-    import_parser.add_argument(
+    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 downloading it.",
+        help="Only create .dvc file without actually importing target data.",
     )
-    import_parser.add_argument(
-        "--desc",
-        type=str,
-        metavar="<text>",
-        help=(
-            "User description of the data (optional). "
-            "This doesn't affect any DVC operations."
-        ),
+    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",
@@ -94,4 +103,6 @@ def add_parser(subparsers, parent_parser):
         ),
         metavar="<number>",
     )
+
+    _add_annotating_args(import_parser)
     import_parser.set_defaults(func=CmdImport)

dvc/commands/imp_url.py

@@ -17,23 +17,29 @@ class CmdImportUrl(CmdBase):
                 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,
+                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."
     )
@@ -66,12 +72,6 @@ def add_parser(subparsers, parent_parser):
         help="Specify name of the .dvc file this command will generate.",
         metavar="<filename>",
     ).complete = completion.DIR
-    import_parser.add_argument(
-        "--no-exec",
-        action="store_true",
-        default=False,
-        help="Only create .dvc file without actually downloading it.",
-    )
     import_parser.add_argument(
         "--to-remote",
         action="store_true",
@@ -84,6 +84,20 @@ 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",
@@ -95,12 +109,13 @@ def add_parser(subparsers, parent_parser):
         metavar="<number>",
     )
     import_parser.add_argument(
-        "--desc",
-        type=str,
-        metavar="<text>",
+        "--version-aware",
+        action="store_true",
+        default=False,
         help=(
-            "User description of the data (optional). "
-            "This doesn't affect any DVC operations."
+            "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/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/ls_url.py

@@ -0,0 +1,43 @@
+import argparse
+import logging
+
+from dvc.cli.command import CmdBaseNoRepo
+from dvc.cli.utils import append_doc_link
+from dvc.ui import ui
+
+from .ls import _prettify
+
+logger = logging.getLogger(__name__)
+
+
+class CmdListUrl(CmdBaseNoRepo):
+    def run(self):
+        from dvc.repo import Repo
+
+        entries = Repo.ls_url(self.args.url, recursive=self.args.recursive)
+        if entries:
+            entries = _prettify(entries, with_color=True)
+            ui.write("\n".join(entries))
+        return 0
+
+
+def add_parser(subparsers, parent_parser):
+    LS_HELP = "List directory contents from URL."
+    lsurl_parser = subparsers.add_parser(
+        "list-url",
+        aliases=["ls-url"],
+        parents=[parent_parser],
+        description=append_doc_link(LS_HELP, "list-url"),
+        help=LS_HELP,
+        formatter_class=argparse.RawDescriptionHelpFormatter,
+    )
+    lsurl_parser.add_argument(
+        "url", help="See `dvc import-url -h` for full list of supported URLs."
+    )
+    lsurl_parser.add_argument(
+        "-R",
+        "--recursive",
+        action="store_true",
+        help="Recursively list files.",
+    )
+    lsurl_parser.set_defaults(func=CmdListUrl)

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
 
@@ -177,6 +177,7 @@ class CmdMachineRename(CmdBase):
             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 +200,7 @@ 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
@@ -324,7 +325,7 @@ 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)

dvc/commands/plots.py

@@ -25,7 +25,7 @@ def _show_json(renderers, split=False):
 
 
 def _adjust_vega_renderers(renderers):
-    from dvc.render import VERSION_FIELD
+    from dvc.render import REVISION_FIELD, VERSION_FIELD
     from dvc_render import VegaRenderer
 
     for r in renderers:
@@ -42,6 +42,7 @@ def _adjust_vega_renderers(renderers):
                         dp["rev"] = "::".join(vi.values())
             else:
                 for dp in r.datapoints:
+                    dp[REVISION_FIELD] = dp[VERSION_FIELD]["revision"]
                     dp.pop(VERSION_FIELD, {})
 
 
@@ -66,18 +67,6 @@ def _data_versions_count(renderer):
     return len(set(x))
 
 
-def _filter_unhandled_renderers(renderers):
-    # filtering out renderers currently unhandled by vscode extension
-    from dvc_render import VegaRenderer
-
-    def _is_json_viable(r):
-        return not (
-            isinstance(r, VegaRenderer) and _data_versions_count(r) > 1
-        )
-
-    return list(filter(_is_json_viable, renderers))
-
-
 class CmdPlots(CmdBase):
     def _func(self, *args, **kwargs):
         raise NotImplementedError
@@ -90,10 +79,8 @@ class CmdPlots(CmdBase):
         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
+            return {self.args.from_config}
 
     def _html_template_path(self):
         html_template_path = self.args.html_template
@@ -102,12 +89,13 @@ class CmdPlots(CmdBase):
                 "html_template", None
             )
             if html_template_path and not os.path.isabs(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
         from pathlib import Path
 
         from dvc.render.match import match_defs_renderers
@@ -156,12 +144,10 @@ class CmdPlots(CmdBase):
                 templates_dir=self.repo.plots.templates_dir,
             )
             if self.args.json:
-                renderers = _filter_unhandled_renderers(renderers)
                 _show_json(renderers, self.args.split)
                 return 0
 
             _adjust_vega_renderers(renderers)
-
             if self.args.show_vega:
                 renderer = first(filter(lambda r: r.TYPE == "vega", renderers))
                 if renderer:
@@ -223,31 +209,21 @@ class CmdPlotsModify(CmdPlots):
 
 
 class CmdPlotsTemplates(CmdBase):
-    TEMPLATES_CHOICES = [
-        "simple",
-        "linear",
-        "confusion",
-        "confusion_normalized",
-        "scatter",
-        "smooth",
-        "bar_horizontal_sorted",
-        "bar_horizontal",
-    ]
-
     def run(self):
-        from dvc_render.vega_templates import dump_templates
+        from dvc.exceptions import InvalidArgumentError
+        from dvc_render.vega_templates import TEMPLATES
 
         try:
-            out = (
-                os.path.join(os.getcwd(), self.args.out)
-                if self.args.out
-                else self.repo.plots.templates_dir
-            )
+            target = self.args.template
+            if target:
+                for template in TEMPLATES:
+                    if target == template.DEFAULT_NAME:
+                        ui.write_json(template.DEFAULT_CONTENT)
+                        return 0
+                raise InvalidArgumentError(f"Unexpected template: {target}.")
 
-            targets = [self.args.target] if self.args.target else None
-            dump_templates(output=out, targets=targets)
-            templates_path = os.path.relpath(out, os.getcwd())
-            ui.write(f"Templates have been written into '{templates_path}'.")
+            for template in TEMPLATES:
+                ui.write(template.DEFAULT_NAME)
 
             return 0
         except DvcException:
@@ -357,8 +333,7 @@ def add_parser(subparsers, parent_parser):
     plots_modify_parser.set_defaults(func=CmdPlotsModify)
 
     TEMPLATES_HELP = (
-        "Write built-in plots templates to a directory "
-        "(.dvc/plots by default)."
+        "List built-in plots templates or show JSON specification for one."
     )
     plots_templates_parser = plots_subparsers.add_parser(
         "templates",
@@ -368,13 +343,14 @@ def add_parser(subparsers, parent_parser):
         formatter_class=argparse.RawDescriptionHelpFormatter,
     )
     plots_templates_parser.add_argument(
-        "target",
+        "template",
         default=None,
         nargs="?",
-        choices=CmdPlotsTemplates.TEMPLATES_CHOICES,
-        help="Template to write. Writes all templates by default.",
+        help=(
+            "Template for which to show JSON specification. "
+            "List all template names by default."
+        ),
     )
-    _add_output_argument(plots_templates_parser, typ="templates")
     plots_templates_parser.set_defaults(func=CmdPlotsTemplates)
 
 

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 +11,18 @@ 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 +30,13 @@ 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/status.py

@@ -1,33 +1,34 @@
 import argparse
 import logging
-from typing import List, Mapping, Optional
+from typing import Dict, List, Optional
 
 from dvc.cli.command import CmdBase
 from dvc.cli.utils import append_doc_link
+from dvc.commands.experiments.show import format_time
 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):
+    def run(self) -> int:
         result: List[
-            Mapping[str, Optional[str]]
+            Dict[str, Optional[str]]
         ] = 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"],
                     ]

dvc/commands/remote.py

@@ -164,7 +164,7 @@ 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)

dvc/commands/repro.py

@@ -55,7 +55,16 @@ def add_arguments(repro_parser):
     repro_parser.add_argument(
         "targets",
         nargs="*",
-        help="Stages to reproduce. 'dvc.yaml' by default.",
+        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",

dvc/commands/stage.py

@@ -67,7 +67,7 @@ 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)
             )
@@ -76,7 +76,7 @@ class CmdStageList(CmdBase):
         # removing duplicates while maintaining order
         collected = chain.from_iterable(
             self.repo.stage.collect(
-                target=target, recursive=self.args.recursive, accept_group=True
+                target=target, recursive=self.args.recursive
             )
             for target in self.args.targets
         )
@@ -95,7 +95,7 @@ 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
 
@@ -238,26 +238,6 @@ def _add_common_args(parser):
         help="Declare output plot file (do not put into DVC cache).",
         metavar="<path>",
     )
-    parser.add_argument(
-        "--live", help="Declare output as dvclive.", metavar="<path>"
-    )
-    parser.add_argument(
-        "--live-no-cache",
-        help="Declare output as dvclive (do not put into DVC cache).",
-        metavar="<path>",
-    )
-    parser.add_argument(
-        "--live-no-summary",
-        action="store_true",
-        default=False,
-        help=argparse.SUPPRESS,
-    )
-    parser.add_argument(
-        "--live-no-html",
-        action="store_true",
-        default=False,
-        help="Signal dvclive logger to not produce training report.",
-    )
     parser.add_argument(
         "-w",
         "--wdir",

dvc/commands/update.py

@@ -18,6 +18,7 @@ class CmdUpdate(CmdBase):
                 rev=self.args.rev,
                 recursive=self.args.recursive,
                 to_remote=self.args.to_remote,
+                no_download=self.args.no_download,
                 remote=self.args.remote,
                 jobs=self.args.jobs,
             )
@@ -30,7 +31,8 @@ class CmdUpdate(CmdBase):
 def add_parser(subparsers, parent_parser):
     UPDATE_HELP = (
         "Update data artifact imported (via dvc import or dvc import-url) "
-        "from an external DVC repository or URL."
+        "from an external DVC repository or URL, or update data from a "
+        "DVC worktree remote."
     )
     update_parser = subparsers.add_parser(
         "update",
@@ -55,6 +57,13 @@ def add_parser(subparsers, parent_parser):
         default=False,
         help="Update all stages in the specified directory.",
     )
+    update_parser.add_argument(
+        "--no-download",
+        action="store_true",
+        default=False,
+        help="Update .dvc file git revision/hash value(s)"
+        " but do not download the file(s).",
+    )
     update_parser.add_argument(
         "--to-remote",
         action="store_true",

dvc/compare.py

@@ -58,7 +58,7 @@ class TabularData(MutableSequence[Sequence["CellT"]]):
         return self._columns[name]
 
     def items(self) -> ItemsView[str, Column]:
-        projection = {k: self.column(k) for k in self.keys()}
+        projection = {k: self.column(k) for k in self.keys()}  # noqa: SIM118
         return projection.items()
 
     def keys(self) -> List[str]:
@@ -167,7 +167,7 @@ class TabularData(MutableSequence[Sequence["CellT"]]):
         return buff.getvalue()
 
     def to_parallel_coordinates(
-        self, output_path: "StrPath", color_by: str = None
+        self, output_path: "StrPath", color_by: Optional[str] = None
     ) -> "StrPath":
         from dvc_render.html import render_html
         from dvc_render.plotly import ParallelCoordinatesRenderer
@@ -195,7 +195,8 @@ class TabularData(MutableSequence[Sequence["CellT"]]):
                 self.add_column(key)
 
         row: List["CellT"] = [
-            with_value(d.get(key), self._fill_value) for key in self.keys()
+            with_value(d.get(key), self._fill_value)
+            for key in self.keys()  # noqa: SIM118
         ]
         self.append(row)
 
@@ -208,14 +209,14 @@ 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))
         ]
 
-    def dropna(
+    def dropna(  # noqa: C901
         self,
         axis: str = "rows",
         how="any",
@@ -228,7 +229,7 @@ class TabularData(MutableSequence[Sequence["CellT"]]):
             )
         if how not in ["any", "all"]:
             raise ValueError(
-                f"Invalid 'how' value {how}." "Choose one of ['any', 'all']"
+                f"Invalid 'how' value {how}. Choose one of ['any', 'all']"
             )
 
         match_line: Set = set()
@@ -244,8 +245,7 @@ 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":
@@ -256,7 +256,7 @@ class TabularData(MutableSequence[Sequence["CellT"]]):
             to_drop -= match_line
 
         if axis == "rows":
-            for name in self.keys():
+            for name in self.keys():  # noqa: SIM118
                 self._columns[name] = Column(
                     [
                         x
@@ -267,7 +267,7 @@ class TabularData(MutableSequence[Sequence["CellT"]]):
         else:
             self.drop(*to_drop)
 
-    def drop_duplicates(
+    def drop_duplicates(  # noqa: C901
         self,
         axis: str = "rows",
         subset: Optional[Iterable[str]] = None,
@@ -309,7 +309,7 @@ class TabularData(MutableSequence[Sequence["CellT"]]):
                 else:
                     unique_rows.append(tuple_row)
 
-            for name in self.keys():
+            for name in self.keys():  # noqa: SIM118
                 self._columns[name] = Column(
                     [
                         x
@@ -324,12 +324,13 @@ 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 +346,11 @@ 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"
@@ -393,12 +394,12 @@ def show_diff(
     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 +421,7 @@ 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 +461,7 @@ 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__)
 
 
@@ -84,7 +91,11 @@ 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,
     ):  # pylint: disable=super-init-not-called
         from dvc.fs import LocalFileSystem
 
@@ -116,7 +127,7 @@ class Config(dict):
             return site_config_dir(cls.APPNAME, cls.APPAUTHOR)
 
     @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 +150,12 @@ 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
+    ):
         """Loads config from all the config files.
 
         Raises:
@@ -169,14 +182,19 @@ class Config(dict):
         return self.fs if level == "repo" else self.wfs
 
     def _load_config(self, level):
-        from configobj import ConfigObj
+        from configobj import ConfigObj, ConfigObjError
 
         filename = self.files[level]
         fs = self._get_fs(level)
 
         if fs.exists(filename):
             with fs.open(filename) as fobj:
-                conf_obj = ConfigObj(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
         else:
             conf_obj = ConfigObj()
         return _parse_named(_lower_keys(conf_obj.dict()))
@@ -275,7 +293,7 @@ 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
@@ -321,7 +339,7 @@ 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)

dvc/config_schema.py

@@ -78,7 +78,9 @@ REMOTE_COMMON = {
     "url": str,
     "checksum_jobs": All(Coerce(int), Range(1)),
     "jobs": All(Coerce(int), Range(1)),
+    Optional("worktree"): Bool,
     Optional("no_traverse"): Bool,  # obsoleted
+    Optional("version_aware"): Bool,
 }
 LOCAL_COMMON = {
     "type": supported_cache_type,
@@ -95,6 +97,8 @@ 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 = {
@@ -102,6 +106,7 @@ WEBDAV_COMMON = {
     "password": str,
     "ask_password": Bool,
     "token": str,
+    "custom_auth_header": str,
     "cert_path": str,
     "key_path": str,
     "timeout": Coerce(int),
@@ -178,6 +183,8 @@ SCHEMA = {
                     "user": str,
                     "password": str,
                     "ask_password": Bool,
+                    "passphrase": str,
+                    "ask_passphrase": Bool,
                     "keyfile": str,
                     "timeout": Coerce(int),
                     "gss_auth": Bool,
@@ -289,4 +296,9 @@ SCHEMA = {
         "bool": All(Lower, Choices("store_true", "boolean_optional")),
         "list": All(Lower, Choices("nargs", "append")),
     },
+    "hydra": {
+        Optional("enabled", default=False): Bool,
+        "config_dir": str,
+        "config_name": str,
+    },
 }

dvc/daemon.py

@@ -25,21 +25,24 @@ def _popen(cmd, **kwargs):
 
 
 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 (
+            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(
+            cmd, env=env, creationflags=creationflags, startupinfo=startupinfo
+        )
 
 
 def _spawn_posix(cmd, env):
@@ -49,17 +52,19 @@ def _spawn_posix(cmd, env):
     # 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:
@@ -100,7 +105,7 @@ 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]):

dvc/dagascii.py

@@ -59,8 +59,7 @@ class AsciiCanvas:
     def draw(self):
         """Draws ASCII canvas on the screen."""
         lines = map("".join, self.canvas)
-        joined_lines = os.linesep.join(lines)
-        return joined_lines
+        return os.linesep.join(lines)
 
     def point(self, x, y, char):
         """Create a point on ASCII canvas.
@@ -81,7 +80,7 @@ class AsciiCanvas:
 
         self.canvas[y][x] = char
 
-    def line(self, x0, y0, x1, y1, char):
+    def line(self, x0, y0, x1, y1, char):  # noqa: C901
         """Create a line on ASCII canvas.
 
         Args:

dvc/data_cloud.py

@@ -3,16 +3,40 @@
 import logging
 from typing import TYPE_CHECKING, Iterable, Optional
 
-from dvc_data.db import get_index
+from dvc.config import NoRemoteError, RemoteConfigError
+from dvc.utils.objects import cached_property
+from dvc_data.hashfile.db import get_index
 
 if TYPE_CHECKING:
+    from dvc.fs import FileSystem
     from dvc_data.hashfile.db import HashFileDB
     from dvc_data.hashfile.hash_info import HashInfo
-    from dvc_data.status import CompareStatusResult
+    from dvc_data.hashfile.status import CompareStatusResult
+    from dvc_data.hashfile.transfer import TransferResult
 
 logger = logging.getLogger(__name__)
 
 
+class Remote:
+    def __init__(self, name: str, path: str, fs: "FileSystem", **config):
+        self.path = path
+        self.fs = fs
+        self.name = name
+
+        self.worktree: bool = config.pop("worktree", False)
+        self.config = config
+
+    @cached_property
+    def odb(self) -> "HashFileDB":
+        from dvc_data.hashfile.db import get_odb
+
+        path = self.path
+        if self.worktree:
+            path = self.fs.path.join(path, ".dvc", "cache")
+
+        return get_odb(self.fs, path, **self.config)
+
+
 class DataCloud:
     """Class that manages dvc remotes.
 
@@ -27,18 +51,31 @@ class DataCloud:
     def __init__(self, repo):
         self.repo = repo
 
-    def get_remote_odb(
+    def get_remote(
         self,
         name: Optional[str] = None,
         command: str = "<command>",
-    ) -> "HashFileDB":
-        from dvc.config import NoRemoteError
-
+    ) -> "Remote":
         if not name:
             name = self.repo.config["core"].get("remote")
 
         if name:
-            return self._init_odb(name)
+            from dvc.fs import get_cloud_fs
+
+            cls, config, fs_path = get_cloud_fs(self.repo, name=name)
+
+            if config.get("worktree"):
+                version_aware = config.get("version_aware")
+                if version_aware is False:
+                    raise RemoteConfigError(
+                        "worktree remotes require version_aware cloud"
+                    )
+                if version_aware is None:
+                    config["version_aware"] = True
+
+            fs = cls(**config)
+            config["tmp_dir"] = self.repo.index_db_dir
+            return Remote(name, fs_path, fs, **config)
 
         if bool(self.repo.config["remote"]):
             error_msg = (
@@ -55,13 +92,17 @@ class DataCloud:
 
         raise NoRemoteError(error_msg)
 
-    def _init_odb(self, name):
-        from dvc.fs import get_cloud_fs
-        from dvc_data.db import get_odb
-
-        cls, config, fs_path = get_cloud_fs(self.repo, name=name)
-        config["tmp_dir"] = self.repo.index_db_dir
-        return get_odb(cls(**config), fs_path, **config)
+    def get_remote_odb(
+        self,
+        name: Optional[str] = None,
+        command: str = "<command>",
+    ) -> "HashFileDB":
+        remote = self.get_remote(name=name, command=command)
+        if remote.fs.version_aware or remote.worktree:
+            raise NoRemoteError(
+                f"'{command}' is unsupported for cloud versioned remotes"
+            )
+        return remote.odb
 
     def _log_missing(self, status: "CompareStatusResult"):
         if status.missing:
@@ -71,7 +112,8 @@ class DataCloud:
             )
             logger.warning(
                 "Some of the cache files do not exist neither locally "
-                f"nor on remote. Missing cache files:\n{missing_desc}"
+                "nor on remote. Missing cache files:\n%s",
+                missing_desc,
             )
 
     def transfer(
@@ -80,14 +122,10 @@ class DataCloud:
         dest_odb: "HashFileDB",
         objs: Iterable["HashInfo"],
         **kwargs,
-    ):
-        from dvc.exceptions import FileTransferError
-        from dvc_data.transfer import TransferError, transfer
+    ) -> "TransferResult":
+        from dvc_data.hashfile.transfer import transfer
 
-        try:
-            return transfer(src_odb, dest_odb, objs, **kwargs)
-        except TransferError as exc:
-            raise FileTransferError(exc.fails) from exc
+        return transfer(src_odb, dest_odb, objs, **kwargs)
 
     def push(
         self,
@@ -95,7 +133,7 @@ class DataCloud:
         jobs: Optional[int] = None,
         remote: Optional[str] = None,
         odb: Optional["HashFileDB"] = None,
-    ):
+    ) -> "TransferResult":
         """Push data items in a cloud-agnostic way.
 
         Args:
@@ -122,7 +160,7 @@ class DataCloud:
         jobs: Optional[int] = None,
         remote: Optional[str] = None,
         odb: Optional["HashFileDB"] = None,
-    ):
+    ) -> "TransferResult":
         """Pull data items in a cloud-agnostic way.
 
         Args:
@@ -150,7 +188,6 @@ class DataCloud:
         jobs: Optional[int] = None,
         remote: Optional[str] = None,
         odb: Optional["HashFileDB"] = None,
-        log_missing: bool = True,
     ):
         """Check status of data items in a cloud-agnostic way.
 
@@ -161,10 +198,8 @@ class DataCloud:
                 cache to. By default remote from core.remote config option
                 is used.
             odb: optional ODB to check status from. Overrides remote.
-            log_missing: log warning messages if file doesn't exist
-                neither in cache, neither in cloud.
         """
-        from dvc_data.status import compare_status
+        from dvc_data.hashfile.status import compare_status
 
         if not odb:
             odb = self.get_remote_odb(remote, "status")
@@ -173,7 +208,6 @@ class DataCloud:
             odb,
             objs,
             jobs=jobs,
-            log_missing=log_missing,
             dest_index=get_index(odb),
             cache_odb=self.repo.odb.local,
         )

dvc/dependency/__init__.py

@@ -1,7 +1,7 @@
 from collections import defaultdict
-from typing import Any, Mapping
+from typing import Any, Mapping, Set
 
-from dvc.output import ARTIFACT_SCHEMA, Output
+from dvc.output import ARTIFACT_SCHEMA, DIR_FILES_SCHEMA, Output
 
 from .base import Dependency
 from .param import ParamsDependency
@@ -15,10 +15,11 @@ SCHEMA: Mapping[str, Any] = {
     **ARTIFACT_SCHEMA,
     **RepoDependency.REPO_SCHEMA,
     **ParamsDependency.PARAM_SCHEMA,
+    Output.PARAM_FILES: [DIR_FILES_SCHEMA],
 }
 
 
-def _get(stage, p, info):
+def _get(stage, p, info, **kwargs):
     if info and info.get(RepoDependency.PARAM_REPO):
         repo = info.pop(RepoDependency.PARAM_REPO)
         return RepoDependency(repo, stage, p, info)
@@ -27,21 +28,30 @@ def _get(stage, p, info):
         params = info.pop(ParamsDependency.PARAM_PARAMS)
         return ParamsDependency(stage, p, params)
 
-    return Dependency(stage, p, info)
+    return Dependency(stage, p, info, **kwargs)
 
 
 def loadd_from(stage, d_list):
     ret = []
     for d in d_list:
         p = d.pop(Output.PARAM_PATH, None)
-        ret.append(_get(stage, p, d))
+        files = d.pop(Output.PARAM_FILES, None)
+        ret.append(_get(stage, p, d, files=files))
     return ret
 
 
-def loads_from(stage, s_list, erepo=None):
+def loads_from(stage, s_list, erepo=None, fs_config=None):
     assert isinstance(s_list, list)
     info = {RepoDependency.PARAM_REPO: erepo} if erepo else {}
-    return [_get(stage, s, info.copy()) for s in s_list]
+    return [
+        _get(
+            stage,
+            s,
+            info.copy(),
+            fs_config=fs_config,
+        )
+        for s in s_list
+    ]
 
 
 def _merge_params(s_list):
@@ -49,7 +59,7 @@ def _merge_params(s_list):
     default_file = ParamsDependency.DEFAULT_PARAMS_FILE
 
     # figure out completely tracked params file, and ignore specific keys
-    wholly_tracked = set()
+    wholly_tracked: Set[str] = set()
     for key in s_list:
         if not isinstance(key, dict):
             continue
@@ -64,7 +74,7 @@ def _merge_params(s_list):
         if not isinstance(key, dict):
             msg = "Only list of str/dict is supported. Got: "
             msg += f"'{type(key).__name__}'."
-            raise ValueError(msg)
+            raise ValueError(msg)  # noqa: TRY004
 
         for k, params in key.items():
             if k in wholly_tracked:
@@ -73,7 +83,7 @@ def _merge_params(s_list):
             if not isinstance(params, list):
                 msg = "Expected list of params for custom params file "
                 msg += f"'{k}', got '{type(params).__name__}'."
-                raise ValueError(msg)
+                raise ValueError(msg)  # noqa: TRY004
             d[k].extend(params)
     return d
 

dvc/dependency/base.py

@@ -1,6 +1,7 @@
-from typing import Type
+from typing import Dict, Type
 
 from dvc.exceptions import DvcException
+from dvc.fs import download as fs_download
 from dvc.output import Output
 
 
@@ -24,11 +25,43 @@ class DependencyIsStageFileError(DvcException):
 class Dependency(Output):
     IS_DEPENDENCY = True
 
-    DoesNotExistError = DependencyDoesNotExistError  # type: Type[DvcException]
-    IsNotFileOrDirError = (
-        DependencyIsNotFileOrDirError
-    )  # type: Type[DvcException]
-    IsStageFileError = DependencyIsStageFileError  # type: Type[DvcException]
+    DoesNotExistError: Type[DvcException] = DependencyDoesNotExistError
+    IsNotFileOrDirError: Type[DvcException] = DependencyIsNotFileOrDirError
+    IsStageFileError: Type[DvcException] = DependencyIsStageFileError
+
+    def workspace_status(self) -> Dict[str, str]:
+        if self.fs.version_aware:
+            old_fs_path = self.fs_path
+            try:
+                self.fs_path = self.fs.path.version_path(self.fs_path, None)
+                if self.changed_meta():
+                    return {str(self): "update available"}
+            finally:
+                self.fs_path = old_fs_path
+        return super().workspace_status()
 
     def update(self, rev=None):
-        pass
+        if self.fs.version_aware:
+            self.fs_path = self.fs.path.version_path(self.fs_path, rev)
+            self.meta = self.get_meta()
+            self.def_path = self.fs.path.version_path(
+                self.def_path, self.meta.version_id
+            )
+            self.fs_path = self.fs.path.version_path(
+                self.fs_path, self.meta.version_id
+            )
+
+    def download(self, to, jobs=None):
+        fs_download(self.fs, self.fs_path, to, jobs=jobs)
+
+    def save(self):
+        super().save()
+        if self.fs.version_aware:
+            self.fs_path = self.fs.path.version_path(
+                self.fs_path, self.meta.version_id
+            )
+
+    def dumpd(self, **kwargs):
+        if self.fs.version_aware:
+            kwargs["with_files"] = True
+        return super().dumpd(**kwargs)

dvc/dependency/param.py

@@ -2,7 +2,7 @@ import logging
 import os
 import typing
 from collections import defaultdict
-from typing import Dict
+from typing import Dict, cast
 
 import dpath.util
 from voluptuous import Any
@@ -39,14 +39,18 @@ class ParamsDependency(Dependency):
 
     def __init__(self, stage, path, params=None, repo=None):
         self.params = list(params) if params else []
-        info = (
-            {self.PARAM_PARAMS: params} if isinstance(params, dict) else None
-        )
+        hash_info = HashInfo()
+        if isinstance(params, dict):
+            hash_info = HashInfo(
+                self.PARAM_PARAMS,
+                params,  # type: ignore[arg-type]
+            )
         repo = repo or stage.repo
         path = path or os.path.join(repo.root_dir, self.DEFAULT_PARAMS_FILE)
-        super().__init__(stage, path, info=info, repo=repo)
+        super().__init__(stage, path, repo=repo)
+        self.hash_info = hash_info
 
-    def dumpd(self):
+    def dumpd(self, **kwargs):
         ret = super().dumpd()
         if not self.hash_info:
             ret[self.PARAM_PARAMS] = self.params or {}
@@ -63,7 +67,10 @@ class ParamsDependency(Dependency):
         for param in self.params:
             if param in values:
                 info[param] = values[param]
-        self.hash_info = HashInfo(self.PARAM_PARAMS, info)
+        self.hash_info = HashInfo(
+            self.PARAM_PARAMS,
+            info,  # type: ignore[arg-type]
+        )
 
     def read_params(
         self, flatten: bool = True, **kwargs: typing.Any
@@ -103,8 +110,8 @@ class ParamsDependency(Dependency):
 
         from funcy import ldistinct
 
-        status = defaultdict(dict)
-        info = self.hash_info.value if self.hash_info else {}
+        status: Dict[str, Any] = defaultdict(dict)
+        info = cast(dict, self.hash_info.value) if self.hash_info else {}
         actual = self.read_params()
 
         # NOTE: we want to preserve the order of params as specified in the
@@ -118,9 +125,13 @@ class ParamsDependency(Dependency):
             elif param not in info:
                 st = "new"
             elif actual[param] != info[param]:
+                if (
+                    isinstance(actual[param], tuple)
+                    and list(actual[param]) == info[param]
+                ):
+                    continue
                 st = "modified"
             else:
-                assert actual[param] == info[param]
                 continue
 
             status[str(self)][param] = st
@@ -158,13 +169,13 @@ class ParamsDependency(Dependency):
                 )
             )
 
-        return HashInfo(self.PARAM_PARAMS, info)
+        return HashInfo(self.PARAM_PARAMS, info)  # type: ignore[arg-type]
 
     def save(self):
         if not self.exists:
             raise self.DoesNotExistError(self)
 
-        if not self.isfile and not self.isdir:
+        if not self.isfile() and not self.isdir():
             raise self.IsNotFileOrDirError(self)
 
         self.ignore()

dvc/dependency/repo.py

@@ -1,7 +1,7 @@
 import os
 from collections import defaultdict
 from copy import copy
-from typing import TYPE_CHECKING, Dict, Optional, Set, Tuple
+from typing import TYPE_CHECKING, Dict, Optional, Set, Tuple, Union
 
 from voluptuous import Required
 
@@ -10,8 +10,14 @@ from dvc.prompt import confirm
 from .base import Dependency
 
 if TYPE_CHECKING:
-    from dvc_data.hashfile.file import HashFile
+    from typing import ContextManager
+
+    from dvc.output import Output
+    from dvc.repo import Repo
+    from dvc.stage import Stage
     from dvc_data.hashfile.hash_info import HashInfo
+    from dvc_data.hashfile.meta import Meta
+    from dvc_data.hashfile.obj import HashFile
     from dvc_objects.db import ObjectDB
 
 
@@ -29,12 +35,15 @@ class RepoDependency(Dependency):
         }
     }
 
-    def __init__(self, def_repo, stage, *args, **kwargs):
+    def __init__(
+        self, def_repo: Dict[str, str], stage: "Stage", *args, **kwargs
+    ):
         self.def_repo = def_repo
         self._objs: Dict[str, "HashFile"] = {}
+        self._meta: Dict[str, "Meta"] = {}
         super().__init__(stage, *args, **kwargs)
 
-    def _parse_path(self, fs, fs_path):
+    def _parse_path(self, fs, fs_path):  # noqa: ARG002
         return None
 
     @property
@@ -59,11 +68,11 @@ class RepoDependency(Dependency):
     def save(self):
         pass
 
-    def dumpd(self):
+    def dumpd(self, **kwargs) -> Dict[str, Union[str, Dict[str, str]]]:
         return {self.PARAM_PATH: self.def_path, self.PARAM_REPO: self.def_repo}
 
-    def download(self, to, jobs=None):
-        from dvc_data.checkout import checkout
+    def download(self, to: "Output", jobs: Optional[int] = None):
+        from dvc_data.hashfile.checkout import checkout
 
         for odb, objs in self.get_used_objs().items():
             self.repo.cloud.pull(objs, jobs=jobs, odb=odb)
@@ -79,13 +88,13 @@ class RepoDependency(Dependency):
             prompt=confirm,
         )
 
-    def update(self, rev=None):
+    def update(self, rev: Optional[str] = None):
         if rev:
             self.def_repo[self.PARAM_REV] = rev
         with self._make_repo(locked=False) as repo:
             self.def_repo[self.PARAM_REV_LOCK] = repo.get_rev()
 
-    def changed_checksum(self):
+    def changed_checksum(self) -> bool:
         # From current repo point of view what describes RepoDependency is its
         # origin project url and rev_lock, and it makes RepoDependency
         # immutable, hence its impossible for checksum to change.
@@ -94,17 +103,19 @@ class RepoDependency(Dependency):
     def get_used_objs(
         self, **kwargs
     ) -> Dict[Optional["ObjectDB"], Set["HashInfo"]]:
-        used, _ = self._get_used_and_obj(**kwargs)
+        used, _, _ = self._get_used_and_obj(**kwargs)
         return used
 
     def _get_used_and_obj(
-        self, obj_only=False, **kwargs
-    ) -> Tuple[Dict[Optional["ObjectDB"], Set["HashInfo"]], "HashFile"]:
+        self, obj_only: bool = False, **kwargs
+    ) -> Tuple[
+        Dict[Optional["ObjectDB"], Set["HashInfo"]], "Meta", "HashFile"
+    ]:
         from dvc.config import NoRemoteError
         from dvc.exceptions import NoOutputOrStageError, PathMissingError
         from dvc.utils import as_posix
-        from dvc_data.build import build
-        from dvc_data.objects.tree import Tree, TreeError
+        from dvc_data.hashfile.build import build
+        from dvc_data.hashfile.tree import Tree, TreeError
 
         local_odb = self.repo.odb.local
         locked = kwargs.pop("locked", True)
@@ -128,10 +139,10 @@ class RepoDependency(Dependency):
                         self._check_circular_import(odb, obj_ids)
                         used_obj_ids[odb].update(obj_ids)
                 except (NoRemoteError, NoOutputOrStageError):
-                    pass
+                    pass  # noqa: S110
 
             try:
-                object_store, _, obj = build(
+                object_store, meta, obj = build(
                     local_odb,
                     as_posix(self.def_path),
                     repo.dvcfs,
@@ -145,16 +156,20 @@ class RepoDependency(Dependency):
             object_store.read_only = True
 
             self._objs[rev] = obj
+            self._meta[rev] = meta
+
             used_obj_ids[object_store].add(obj.hash_info)
             if isinstance(obj, Tree):
                 used_obj_ids[object_store].update(oid for _, _, oid in obj)
-            return used_obj_ids, obj
+            return used_obj_ids, meta, obj
 
-    def _check_circular_import(self, odb, obj_ids):
+    def _check_circular_import(
+        self, odb: "ObjectDB", obj_ids: Set["HashInfo"]
+    ) -> None:
         from dvc.exceptions import CircularImportError
-        from dvc.fs.dvc import DvcFileSystem
-        from dvc_data.db.reference import ReferenceHashFileDB
-        from dvc_data.objects.tree import Tree
+        from dvc.fs.dvc import DVCFileSystem
+        from dvc_data.hashfile.db.reference import ReferenceHashFileDB
+        from dvc_data.hashfile.tree import Tree
 
         if not isinstance(odb, ReferenceHashFileDB):
             return
@@ -165,11 +180,12 @@ class RepoDependency(Dependency):
                     tree = Tree.load(odb, hash_info)
                     yield from (odb.get(hi.value) for _, _, hi in tree)
                 else:
+                    assert hash_info.value
                     yield odb.get(hash_info.value)
 
         checked_urls = set()
         for obj in iter_objs():
-            if not isinstance(obj.fs, DvcFileSystem):
+            if not isinstance(obj.fs, DVCFileSystem):
                 continue
             if (
                 obj.fs.repo_url in checked_urls
@@ -190,19 +206,31 @@ class RepoDependency(Dependency):
         rev = self._get_rev(locked=locked)
         if rev in self._objs:
             return self._objs[rev]
-        _, obj = self._get_used_and_obj(
+        _, _, obj = self._get_used_and_obj(
             obj_only=True, filter_info=filter_info, **kwargs
         )
         return obj
 
-    def _make_repo(self, locked=True, **kwargs):
+    def get_meta(self, filter_info=None, **kwargs):
+        locked = kwargs.get("locked", True)
+        rev = self._get_rev(locked=locked)
+        if rev in self._meta:
+            return self._meta[rev]
+        _, meta, _ = self._get_used_and_obj(
+            obj_only=True, filter_info=filter_info, **kwargs
+        )
+        return meta
+
+    def _make_repo(
+        self, locked: bool = True, **kwargs
+    ) -> "ContextManager[Repo]":
         from dvc.external_repo import external_repo
 
         d = self.def_repo
         rev = self._get_rev(locked=locked)
         return external_repo(d[self.PARAM_URL], rev=rev, **kwargs)
 
-    def _get_rev(self, locked=True):
+    def _get_rev(self, locked: bool = True):
         d = self.def_repo
         return (d.get(self.PARAM_REV_LOCK) if locked else None) or d.get(
             self.PARAM_REV

dvc/dvcfile.py

@@ -1,7 +1,17 @@
 import contextlib
 import logging
 import os
-from typing import TYPE_CHECKING, Any, Callable, Tuple, TypeVar, Union
+from typing import (
+    TYPE_CHECKING,
+    Any,
+    Callable,
+    Dict,
+    List,
+    Optional,
+    Tuple,
+    TypeVar,
+    Union,
+)
 
 from dvc.exceptions import DvcException
 from dvc.parsing.versions import LOCKFILE_VERSION, SCHEMA_KWD
@@ -11,21 +21,25 @@ from dvc.stage.exceptions import (
     StageFileDoesNotExistError,
     StageFileIsNotDvcFileError,
 )
-from dvc.types import AnyPath
 from dvc.utils import relpath
 from dvc.utils.collections import apply_diff
+from dvc.utils.objects import cached_property
 from dvc.utils.serialize import dump_yaml, modify_yaml
 
 if TYPE_CHECKING:
     from dvc.repo import Repo
+    from dvc.types import StrOrBytesPath
+
+    from .parsing import DataResolver
+    from .stage import Stage
 
 logger = logging.getLogger(__name__)
 _T = TypeVar("_T")
 
 DVC_FILE = "Dvcfile"
 DVC_FILE_SUFFIX = ".dvc"
-PIPELINE_FILE = "dvc.yaml"
-PIPELINE_LOCK = "dvc.lock"
+PROJECT_FILE = "dvc.yaml"
+LOCK_FILE = "dvc.lock"
 
 
 class FileIsGitIgnored(DvcException):
@@ -44,7 +58,7 @@ class ParametrizedDumpError(DvcException):
 def is_valid_filename(path):
     return path.endswith(DVC_FILE_SUFFIX) or os.path.basename(path) in [
         DVC_FILE,
-        PIPELINE_FILE,
+        PROJECT_FILE,
     ]
 
 
@@ -55,7 +69,7 @@ def is_dvc_file(path):
 
 
 def is_lock_file(path):
-    return os.path.basename(path) == PIPELINE_LOCK
+    return os.path.basename(path) == LOCK_FILE
 
 
 def is_git_ignored(repo, path):
@@ -75,7 +89,7 @@ def check_dvcfile_path(repo, path):
         raise StageFileBadNameError(
             "bad DVC file name '{}'. DVC files should be named "
             "'{}' or have a '.dvc' suffix (e.g. '{}.dvc').".format(
-                relpath(path), PIPELINE_FILE, os.path.basename(path)
+                relpath(path), PROJECT_FILE, os.path.basename(path)
             )
         )
 
@@ -150,7 +164,7 @@ class FileMixin:
         return self._load_yaml(**kwargs)
 
     @classmethod
-    def validate(cls, d: _T, fname: str = None) -> _T:
+    def validate(cls, d: _T, fname: Optional[str] = None) -> _T:
         from dvc.utils.strictyaml import validate
 
         return validate(d, cls.SCHEMA, path=fname)  # type: ignore[arg-type]
@@ -165,14 +179,15 @@ class FileMixin:
             **kwargs,
         )
 
-    def remove(self, force=False):  # pylint: disable=unused-argument
+    # pylint: disable-next=unused-argument
+    def remove(self, force=False):  # noqa: ARG002
         with contextlib.suppress(FileNotFoundError):
             os.unlink(self.path)
 
     def dump(self, stage, **kwargs):
         raise NotImplementedError
 
-    def merge(self, ancestor, other):
+    def merge(self, ancestor, other, allowed=None):
         raise NotImplementedError
 
 
@@ -180,17 +195,21 @@ class SingleStageFile(FileMixin):
     from dvc.schema import COMPILED_SINGLE_STAGE_SCHEMA as SCHEMA
     from dvc.stage.loader import SingleStageLoader as LOADER
 
+    metrics: List[str] = []
+    plots: Any = {}
+    params: List[str] = []
+
     @property
-    def stage(self):
+    def stage(self) -> "Stage":
         data, raw = self._load()
         return self.LOADER.load_stage(self, data, raw)
 
     @property
-    def stages(self):
+    def stages(self) -> LOADER:
         data, raw = self._load()
         return self.LOADER(self, data, raw)
 
-    def dump(self, stage, **kwargs):
+    def dump(self, stage, **kwargs) -> None:
         """Dumps given stage appropriately in the dvcfile."""
         from dvc.stage import PipelineStage
 
@@ -198,22 +217,23 @@ class SingleStageFile(FileMixin):
         if self.verify:
             check_dvcfile_path(self.repo, self.path)
         logger.debug("Saving information to '%s'.", relpath(self.path))
-        dump_yaml(self.path, serialize.to_single_stage_file(stage))
+        dump_yaml(self.path, serialize.to_single_stage_file(stage, **kwargs))
         self.repo.scm_context.track_file(self.relpath)
 
-    def remove_stage(self, stage):  # pylint: disable=unused-argument
+    # pylint: disable-next=unused-argument
+    def remove_stage(self, stage):  # noqa: ARG002
         self.remove()
 
-    def merge(self, ancestor, other):
+    def merge(self, ancestor, other, allowed=None):
         assert isinstance(ancestor, SingleStageFile)
         assert isinstance(other, SingleStageFile)
 
         stage = self.stage
-        stage.merge(ancestor.stage, other.stage)
+        stage.merge(ancestor.stage, other.stage, allowed=allowed)
         self.dump(stage)
 
 
-class PipelineFile(FileMixin):
+class ProjectFile(FileMixin):
     """Abstraction for pipelines file, .yaml + .lock combined."""
 
     from dvc.schema import COMPILED_MULTI_STAGE_SCHEMA as SCHEMA
@@ -223,6 +243,12 @@ class PipelineFile(FileMixin):
     def _lockfile(self):
         return Lockfile(self.repo, os.path.splitext(self.path)[0] + ".lock")
 
+    def _reset(self):
+        self.__dict__.pop("contents", None)
+        self.__dict__.pop("lockfile_contents", None)
+        self.__dict__.pop("resolver", None)
+        self.__dict__.pop("stages", None)
+
     def dump(
         self, stage, update_pipeline=True, update_lock=True, **kwargs
     ):  # pylint: disable=arguments-differ
@@ -237,15 +263,17 @@ class PipelineFile(FileMixin):
             self._dump_pipeline_file(stage)
 
         if update_lock:
-            self._dump_lockfile(stage)
+            self._dump_lockfile(stage, **kwargs)
 
-    def _dump_lockfile(self, stage):
-        self._lockfile.dump(stage)
+    def _dump_lockfile(self, stage, **kwargs):
+        self._lockfile.dump(stage, **kwargs)
 
     @staticmethod
-    def _check_if_parametrized(stage):
+    def _check_if_parametrized(stage, action: str = "dump") -> None:
         if stage.raw_data.parametrized:
-            raise ParametrizedDumpError(f"cannot dump a parametrized {stage}")
+            raise ParametrizedDumpError(
+                f"cannot {action} a parametrized {stage}"
+            )
 
     def _dump_pipeline_file(self, stage):
         self._check_if_parametrized(stage)
@@ -273,14 +301,39 @@ class PipelineFile(FileMixin):
     @property
     def stage(self):
         raise DvcException(
-            "PipelineFile has multiple stages. Please specify it's name."
+            "ProjectFile has multiple stages. Please specify it's name."
         )
 
+    @cached_property
+    def contents(self) -> Dict[str, Any]:
+        return self._load()[0]
+
+    @cached_property
+    def lockfile_contents(self) -> Dict[str, Any]:
+        return self._lockfile.load()
+
+    @cached_property
+    def resolver(self) -> "DataResolver":
+        from .parsing import DataResolver
+
+        wdir = self.repo.fs.path.parent(self.path)
+        return DataResolver(self.repo, wdir, self.contents)
+
+    @cached_property
+    def stages(self) -> LOADER:
+        return self.LOADER(self, self.contents, self.lockfile_contents)
+
     @property
-    def stages(self):
-        data, _ = self._load()
-        lockfile_data = self._lockfile.load()
-        return self.LOADER(self, data, lockfile_data)
+    def metrics(self) -> List[str]:
+        return self.contents.get("metrics", [])
+
+    @property
+    def plots(self) -> Any:
+        return self.contents.get("plots", {})
+
+    @property
+    def params(self) -> List[str]:
+        return self.contents.get("params", [])
 
     def remove(self, force=False):
         if not force:
@@ -291,6 +344,7 @@ class PipelineFile(FileMixin):
         self._lockfile.remove()
 
     def remove_stage(self, stage):
+        self._check_if_parametrized(stage, "remove")
         self._lockfile.remove_stage(stage)
         if not self.exists():
             return
@@ -307,7 +361,7 @@ class PipelineFile(FileMixin):
         else:
             super().remove()
 
-    def merge(self, ancestor, other):
+    def merge(self, ancestor, other, allowed=None):
         raise NotImplementedError
 
 
@@ -363,7 +417,7 @@ class Lockfile(FileMixin):
         return {SCHEMA_KWD: version}
 
     def dump(self, stage, **kwargs):
-        stage_data = serialize.to_lockfile(stage)
+        stage_data = serialize.to_lockfile(stage, **kwargs)
 
         with modify_yaml(self.path, fs=self.repo.fs) as data:
             version = LOCKFILE_VERSION.from_dict(data)
@@ -408,24 +462,14 @@ class Lockfile(FileMixin):
         else:
             self.remove()
 
-    def merge(self, ancestor, other):
+    def merge(self, ancestor, other, allowed=None):
         raise NotImplementedError
 
 
-class Dvcfile:
-    def __new__(cls, repo: "Repo", path: AnyPath, **kwargs: Any):
-        assert path
-        assert repo
-
-        return make_dvcfile(repo, path, **kwargs)
-
-
-DVCFile = Union["PipelineFile", "SingleStageFile"]
-
-
-def make_dvcfile(repo: "Repo", path: AnyPath, **kwargs: Any) -> DVCFile:
-    _, ext = os.path.splitext(str(path))
-    if ext in [".yaml", ".yml"]:
-        return PipelineFile(repo, path, **kwargs)
-    # fallback to single stage file for better error messages
+def load_file(
+    repo: "Repo", path: "StrOrBytesPath", **kwargs: Any
+) -> Union[ProjectFile, SingleStageFile]:
+    _, ext = os.path.splitext(path)
+    if ext in (".yaml", ".yml"):
+        return ProjectFile(repo, path, **kwargs)
     return SingleStageFile(repo, path, **kwargs)

dvc/env.py

@@ -2,11 +2,10 @@ DVC_CHECKPOINT = "DVC_CHECKPOINT"
 DVC_DAEMON = "DVC_DAEMON"
 DVC_PAGER = "DVC_PAGER"
 DVC_ROOT = "DVC_ROOT"
-DVCLIVE_PATH = "DVCLIVE_PATH"
-DVCLIVE_SUMMARY = "DVCLIVE_SUMMARY"
-DVCLIVE_HTML = "DVCLIVE_HTML"
 DVCLIVE_RESUME = "DVCLIVE_RESUME"
 DVC_IGNORE_ISATTY = "DVC_IGNORE_ISATTY"
+DVC_EXP_BASELINE_REV = "DVC_EXP_BASELINE_REV"
+DVC_EXP_NAME = "DVC_EXP_NAME"
 DVC_EXP_GIT_REMOTE = "DVC_EXP_GIT_REMOTE"
 DVC_EXP_AUTO_PUSH = "DVC_EXP_AUTO_PUSH"
 DVC_NO_ANALYTICS = "DVC_NO_ANALYTICS"

dvc/exceptions.py

@@ -1,4 +1,6 @@
 """Exceptions raised by the dvc."""
+from typing import Dict, List
+
 from dvc.utils import format_link
 
 
@@ -132,10 +134,17 @@ class NotDvcRepoError(DvcException):
 class CyclicGraphError(DvcException):
     def __init__(self, stages):
         assert isinstance(stages, list)
-        msg = "Pipeline has a cycle involving: {}.".format(
-            ", ".join(s.addressing for s in stages)
+        stage_part = "stage" if len(stages) == 1 else "stages"
+        msg = (
+            "Same item(s) are defined as both a dependency and an output "
+            "in {stage_part}: {stage}."
+        )
+        super().__init__(
+            msg.format(
+                stage_part=stage_part,
+                stage=", ".join(s.addressing for s in stages),
+            )
         )
-        super().__init__(msg)
 
 
 class ConfirmRemoveError(DvcException):
@@ -220,7 +229,7 @@ class UploadError(FileTransferError):
 
 
 class CheckoutError(DvcException):
-    def __init__(self, target_infos, stats=None):
+    def __init__(self, target_infos: List[str], stats: Dict[str, List[str]]):
         from dvc.utils import error_link
 
         self.target_infos = target_infos
@@ -278,6 +287,11 @@ class PathMissingError(DvcException):
         self.dvc_only = dvc_only
 
 
+class URLMissingError(DvcException):
+    def __init__(self, url):
+        super().__init__(f"The path '{url}' does not exist")
+
+
 class RemoteCacheRequiredError(DvcException):
     def __init__(self, scheme, fs_path):
 

dvc/external_repo.py

@@ -3,7 +3,7 @@ import os
 import tempfile
 import threading
 from contextlib import contextmanager
-from typing import TYPE_CHECKING, Dict
+from typing import TYPE_CHECKING, Collection, Dict, Iterator, Optional, Tuple
 
 from funcy import retry, wrap_with
 
@@ -20,7 +20,9 @@ from dvc.scm import CloneError, map_scm_exception
 from dvc.utils import relpath
 
 if TYPE_CHECKING:
-    from scmrepo import Git
+    from dvc.types import StrPath
+
+    from .scm import Git
 
 logger = logging.getLogger(__name__)
 
@@ -28,12 +30,16 @@ logger = logging.getLogger(__name__)
 @contextmanager
 @map_scm_exception()
 def external_repo(
-    url, rev=None, for_write=False, cache_dir=None, cache_types=None, **kwargs
-):
-    from scmrepo.git import Git
-
+    url,
+    rev: Optional[str] = None,
+    for_write: bool = False,
+    cache_dir: Optional["StrPath"] = None,
+    cache_types: Optional[Collection[str]] = None,
+    **kwargs,
+) -> Iterator["Repo"]:
     from dvc.config import NoRemoteError
     from dvc.fs import GitFileSystem
+    from dvc.scm import Git
 
     logger.debug("Creating external repo %s@%s", url, rev)
     path = _cached_clone(url, rev, for_write=for_write)
@@ -108,7 +114,7 @@ def erepo_factory(url, root_dir, cache_config):
     return make_repo
 
 
-CLONES: Dict[str, str] = {}
+CLONES: Dict[str, Tuple[str, bool]] = {}
 CACHE_DIRS: Dict[str, str] = {}
 
 
@@ -185,14 +191,14 @@ def _cached_clone(url, rev, for_write=False):
 
 
 @wrap_with(threading.Lock())
-def _clone_default_branch(url, rev, for_write=False):
+def _clone_default_branch(url, rev, for_write=False):  # noqa: C901
     """Get or create a clean clone of the url.
 
     The cloned is reactualized with git pull unless rev is a known sha.
     """
-    from scmrepo.git import Git
+    from dvc.scm import Git
 
-    clone_path, shallow = CLONES.get(url, (None, False))
+    clone_path, shallow = CLONES.get(url) or (None, False)
 
     git = None
     try:
@@ -267,7 +273,7 @@ def _merge_upstream(git: "Git"):
 
 
 def _git_checkout(repo_path, rev):
-    from scmrepo.git import Git
+    from dvc.scm import Git
 
     logger.debug("erepo: git checkout %s@%s", repo_path, rev)
     git = Git(repo_path)

dvc/fs/__init__.py

@@ -2,6 +2,9 @@ from urllib.parse import urlparse
 
 from dvc_http import HTTPFileSystem, HTTPSFileSystem  # noqa: F401
 
+from dvc.config import ConfigError as RepoConfigError
+from dvc.config_schema import SCHEMA, Invalid
+
 # pylint: disable=unused-import
 from dvc_objects.fs import utils  # noqa: F401
 from dvc_objects.fs import (  # noqa: F401
@@ -23,14 +26,15 @@ from dvc_objects.fs.errors import (  # noqa: F401
 )
 from dvc_objects.fs.path import Path  # noqa: F401
 
+from .callbacks import Callback
 from .data import DataFileSystem  # noqa: F401
-from .dvc import DvcFileSystem  # noqa: F401
+from .dvc import DVCFileSystem  # noqa: F401
 from .git import GitFileSystem  # noqa: F401
 
 known_implementations.update(
     {
         "dvc": {
-            "class": "dvc.fs.dvc.DvcFileSystem",
+            "class": "dvc.fs.dvc.DVCFileSystem",
             "err": "dvc is supported, but requires 'dvc' to be installed",
         },
         "git": {
@@ -44,7 +48,23 @@ known_implementations.update(
 # pylint: enable=unused-import
 
 
-def get_fs_config(repo, config, **kwargs):
+def download(fs, fs_path, to, jobs=None):
+    with Callback.as_tqdm_callback(
+        desc=f"Downloading {fs.path.name(fs_path)}",
+        unit="files",
+    ) as cb:
+        fs.get(fs_path, to.fs_path, batch_size=jobs, callback=cb)
+
+
+def parse_external_url(url, config=None):
+    remote_config = dict(config) if config else {}
+    remote_config["url"] = url
+    fs_cls, fs_config, fs_path = get_cloud_fs(None, **remote_config)
+    fs = fs_cls(**fs_config)
+    return fs, fs_path
+
+
+def get_fs_config(config, **kwargs):
     name = kwargs.get("name")
     if name:
         try:
@@ -52,13 +72,15 @@ def get_fs_config(repo, config, **kwargs):
         except KeyError:
             from dvc.config import RemoteNotFoundError
 
-            raise RemoteNotFoundError(f"remote '{name}' doesn't exist")
+            raise RemoteNotFoundError(  # noqa: B904
+                f"remote '{name}' doesn't exist"
+            )
     else:
         remote_conf = kwargs
-    return _resolve_remote_refs(repo, config, remote_conf)
+    return _resolve_remote_refs(config, remote_conf)
 
 
-def _resolve_remote_refs(repo, config, remote_conf):
+def _resolve_remote_refs(config, remote_conf):
     # Support for cross referenced remotes.
     # This will merge the settings, shadowing base ref with remote_conf.
     # For example, having:
@@ -84,21 +106,22 @@ def _resolve_remote_refs(repo, config, remote_conf):
     if parsed.scheme != "remote":
         return remote_conf
 
-    base = get_fs_config(repo, config, name=parsed.netloc)
-    cls, _, _ = get_cloud_fs(repo, **base)
+    base = get_fs_config(config, name=parsed.netloc)
+    cls, _, _ = _get_cloud_fs(config, **base)
     relpath = parsed.path.lstrip("/").replace("/", cls.sep)
     url = cls.sep.join((base["url"], relpath))
     return {**base, **remote_conf, "url": url}
 
 
 def get_cloud_fs(repo, **kwargs):
-    from dvc.config import ConfigError as RepoConfigError
-    from dvc.config_schema import SCHEMA, Invalid
-
     repo_config = repo.config if repo else {}
+    return _get_cloud_fs(repo_config, **kwargs)
+
+
+def _get_cloud_fs(repo_config, **kwargs):
     core_config = repo_config.get("core", {})
 
-    remote_conf = get_fs_config(repo, repo_config, **kwargs)
+    remote_conf = get_fs_config(repo_config, **kwargs)
     try:
         remote_conf = SCHEMA["remote"][str](remote_conf)
     except Invalid as exc:

dvc/fs/callbacks.py

@@ -1,9 +1,8 @@
 # pylint: disable=unused-import
 from contextlib import ExitStack
-from typing import TYPE_CHECKING, Optional
-
-from funcy import cached_property
+from typing import TYPE_CHECKING, Any, BinaryIO, Dict, Optional, Union, cast
 
+from dvc.utils.objects import cached_property
 from dvc_objects.fs.callbacks import (  # noqa: F401
     DEFAULT_CALLBACK,
     Callback,
@@ -11,6 +10,8 @@ from dvc_objects.fs.callbacks import (  # noqa: F401
 )
 
 if TYPE_CHECKING:
+    from rich.progress import TaskID
+
     from dvc.ui._rich_progress import RichTransferProgress
 
 
@@ -19,11 +20,12 @@ class RichCallback(Callback):
         self,
         size: Optional[int] = None,
         value: int = 0,
-        progress: "RichTransferProgress" = None,
-        desc: str = None,
-        bytes: bool = False,  # pylint: disable=redefined-builtin
-        unit: str = None,
+        progress: Optional["RichTransferProgress"] = None,
+        desc: Optional[str] = None,
+        bytes: bool = False,  # noqa: A002, pylint: disable=redefined-builtin
+        unit: Optional[str] = None,
         disable: bool = False,
+        transient: bool = True,
     ) -> None:
         self._progress = progress
         self.disable = disable
@@ -35,11 +37,12 @@ class RichCallback(Callback):
             "visible": False,
             "progress_type": None if bytes else "summary",
         }
+        self._transient = transient
         self._stack = ExitStack()
         super().__init__(size=size, value=value)
 
     @cached_property
-    def progress(self):
+    def progress(self) -> "RichTransferProgress":
         from dvc.ui import ui
         from dvc.ui._rich_progress import RichTransferProgress
 
@@ -47,24 +50,27 @@ class RichCallback(Callback):
             return self._progress
 
         progress = RichTransferProgress(
-            transient=True,
+            transient=self._transient,
             disable=self.disable,
             console=ui.error_console,
         )
-        return self._stack.enter_context(progress)
+        return cast(RichTransferProgress, self._stack.enter_context(progress))
 
     @cached_property
-    def task(self):
-        return self.progress.add_task(**self._task_kwargs)
+    def task(self) -> "TaskID":
+        return self.progress.add_task(
+            **self._task_kwargs  # type: ignore[arg-type]
+        )
 
     def __enter__(self):
         return self
 
     def close(self):
-        self.progress.clear_task(self.task)
+        if self._transient:
+            self.progress.clear_task(self.task)
         self._stack.close()
 
-    def call(self, hook_name=None, **kwargs):
+    def call(self, hook_name=None, **kwargs):  # noqa: ARG002
         self.progress.update(
             self.task,
             completed=self.value,
@@ -72,8 +78,17 @@ class RichCallback(Callback):
             visible=not self.disable,
         )
 
-    def branch(self, path_1, path_2, kwargs, child: Optional[Callback] = None):
+    def branch(
+        self,
+        path_1: Union[str, BinaryIO],
+        path_2: str,
+        kwargs: Dict[str, Any],
+        child: Optional["Callback"] = None,
+    ):
         child = child or RichCallback(
-            progress=self.progress, desc=path_1, bytes=True
+            progress=self.progress,
+            desc=path_1 if isinstance(path_1, str) else path_2,
+            bytes=True,
+            transient=self._transient,
         )
         return super().branch(path_1, path_2, kwargs, child=child)

dvc/fs/data.py

@@ -1,13 +1,15 @@
+import functools
 import logging
 import os
-import threading
-
-from funcy import cached_property, wrap_prop
+from typing import TYPE_CHECKING
 
 from dvc.utils import as_posix
-from dvc_data.fs import DataFileSystem as _DataFileSystem
 from dvc_objects.fs.base import FileSystem
 
+if TYPE_CHECKING:
+    from dvc_data.fs import DataFileSystem as _DataFileSystem
+
+
 logger = logging.getLogger(__name__)
 
 
@@ -19,9 +21,12 @@ class DataFileSystem(FileSystem):
     def _prepare_credentials(self, **config):
         return config
 
-    @wrap_prop(threading.Lock())
-    @cached_property
-    def fs(self):
+    @functools.cached_property
+    def fs(  # pylint: disable=invalid-overridden-method
+        self,
+    ) -> "_DataFileSystem":
+        from dvc_data.fs import DataFileSystem as _DataFileSystem
+
         return _DataFileSystem(**self.fs_args)
 
     def isdvc(self, path, **kwargs):

dvc/fs/dvc.py

@@ -1,50 +1,50 @@
+import errno
+import functools
 import logging
 import ntpath
 import os
 import posixpath
 import threading
 from contextlib import suppress
-from itertools import takewhile
-from typing import TYPE_CHECKING, Callable, Optional, Tuple, Type, Union
+from typing import (
+    TYPE_CHECKING,
+    Any,
+    Callable,
+    Dict,
+    Optional,
+    Tuple,
+    Type,
+    Union,
+)
 
 from fsspec.spec import AbstractFileSystem
-from funcy import cached_property, wrap_prop, wrap_with
+from funcy import wrap_with
 
 from dvc_objects.fs.base import FileSystem
-from dvc_objects.fs.callbacks import DEFAULT_CALLBACK
 from dvc_objects.fs.path import Path
 
 from .data import DataFileSystem
 
 if TYPE_CHECKING:
     from dvc.repo import Repo
+    from dvc.types import StrPath
 
 logger = logging.getLogger(__name__)
 
-RepoFactory = Union[Callable[[str], "Repo"], Type["Repo"]]
+RepoFactory = Union[Callable[..., "Repo"], Type["Repo"]]
+Key = Tuple[str, ...]
 
 
 def as_posix(path: str) -> str:
     return path.replace(ntpath.sep, posixpath.sep)
 
 
-def _wrap_walk(dvc_fs, *args, **kwargs):
-    for root, dnames, fnames in dvc_fs.walk(*args, **kwargs):
-        yield dvc_fs.path.join(dvc_fs.repo.root_dir, root), dnames, fnames
+# NOT the same as dvc.dvcfile.is_dvc_file()!
+def _is_dvc_file(fname):
+    from dvc.dvcfile import is_valid_filename
+    from dvc.ignore import DvcIgnore
 
-
-def _ls(fs, path):
-    dnames = []
-    fnames = []
-
-    for entry in fs.ls(path, detail=True):
-        name = fs.path.name(entry["name"])
-        if entry["type"] == "directory":
-            dnames.append(name)
-        else:
-            fnames.append(name)
-
-    return dnames, fnames
+    return is_valid_filename(fname) or fname == DvcIgnore.DVCIGNORE_FILE
 
 
 def _merge_info(repo, fs_info, dvc_info):
@@ -70,40 +70,68 @@ def _merge_info(repo, fs_info, dvc_info):
     return ret
 
 
-class _DvcFileSystem(AbstractFileSystem):  # pylint:disable=abstract-method
-    """DVC + git-tracked files fs.
+def _get_dvc_path(dvc_fs, subkey):
+    return dvc_fs.path.join(*subkey) if subkey else ""
 
-    Args:
-        repo: DVC or git repo.
-        subrepos: traverse to subrepos (by default, it ignores subrepos)
-        repo_factory: A function to initialize subrepo with, default is Repo.
-        kwargs: Additional keyword arguments passed to the `DataFileSystem()`.
-    """
 
+class _DVCFileSystem(AbstractFileSystem):  # pylint:disable=abstract-method
+    cachable = False
     root_marker = "/"
 
-    PARAM_REPO_URL = "repo_url"
-    PARAM_REPO_ROOT = "repo_root"
-    PARAM_REV = "rev"
-    PARAM_CACHE_DIR = "cache_dir"
-    PARAM_CACHE_TYPES = "cache_types"
-    PARAM_SUBREPOS = "subrepos"
-
     def __init__(
         self,
+        url: Optional[str] = None,
+        rev: Optional[str] = None,
         repo: Optional["Repo"] = None,
-        subrepos=False,
-        repo_factory: RepoFactory = None,
-        **kwargs,
-    ):
-        super().__init__()
+        subrepos: bool = False,
+        repo_factory: Optional[RepoFactory] = None,
+        **repo_kwargs: Any,
+    ) -> None:
+        """DVC + git-tracked files fs.
 
+        Args:
+            path (str, optional): URL or path to a DVC/Git repository.
+                Defaults to a DVC repository in the current working directory.
+                Both HTTP and SSH protocols are supported for remote Git repos
+                (e.g. [user@]server:project.git).
+            rev (str, optional): Any Git revision such as a branch or tag name,
+                a commit hash or a dvc experiment name.
+                Defaults to the default branch in case of remote repositories.
+                In case of a local repository, if rev is unspecified, it will
+                default to the working directory.
+                If the repo is not a Git repo, this option is ignored.
+            repo (:obj:`Repo`, optional): `Repo` instance.
+            subrepos (bool): traverse to subrepos.
+                By default, it ignores subrepos.
+            repo_factory (callable): A function to initialize subrepo with.
+                The default is `Repo`.
+
+        Examples:
+            - Opening a filesystem from repo in current working directory
+
+            >>> fs = DVCFileSystem()
+
+            - Opening a filesystem from local repository
+
+            >>> fs = DVCFileSystem("path/to/local/repository")
+
+            - Opening a remote repository
+
+            >>> fs = DVCFileSystem(
+            ...    "https://github.com/iterative/example-get-started",
+            ...    rev="main",
+            ... )
+        """
         from pygtrie import Trie
 
+        super().__init__()
         if repo is None:
-            repo, repo_factory = self._repo_from_fs_config(
-                subrepos=subrepos, **kwargs
+            repo = self._make_repo(
+                url=url, rev=rev, subrepos=subrepos, **repo_kwargs
             )
+            assert repo is not None
+            # pylint: disable=protected-access
+            repo_factory = repo._fs_conf["repo_factory"]
 
         if not repo_factory:
             from dvc.repo import Repo
@@ -114,6 +142,7 @@ class _DvcFileSystem(AbstractFileSystem):  # pylint:disable=abstract-method
 
         def _getcwd():
             relparts = ()
+            assert repo is not None
             if repo.fs.path.isin(repo.fs.path.getcwd(), repo.root_dir):
                 relparts = repo.fs.path.relparts(
                     repo.fs.path.getcwd(), repo.root_dir
@@ -137,78 +166,33 @@ class _DvcFileSystem(AbstractFileSystem):  # pylint:disable=abstract-method
         if hasattr(repo, "dvc_dir"):
             self._datafss[key] = DataFileSystem(index=repo.index.data["repo"])
 
-    def _get_key(self, path):
+    def _get_key(self, path: "StrPath") -> Key:
         parts = self.repo.fs.path.relparts(path, self.repo.root_dir)
-        if parts == (".",):
-            parts = ()
+        if parts == (os.curdir,):
+            return ()
         return parts
 
+    def _get_key_from_relative(self, path) -> Key:
+        parts = self.path.relparts(path, self.root_marker)
+        if parts and parts[0] == os.curdir:
+            return parts[1:]
+        return parts
+
+    def _from_key(self, parts: Key) -> str:
+        return self.repo.fs.path.join(self.repo.root_dir, *parts)
+
     @property
     def repo_url(self):
-        if self.repo is None:
-            return None
         return self.repo.url
 
-    @property
-    def config(self):
-        return {
-            self.PARAM_REPO_URL: self.repo_url,
-            self.PARAM_REPO_ROOT: self.repo.root_dir,
-            self.PARAM_REV: getattr(self.repo.fs, "rev", None),
-            self.PARAM_CACHE_DIR: os.path.abspath(self.repo.odb.local.path),
-            self.PARAM_CACHE_TYPES: self.repo.odb.local.cache_types,
-            self.PARAM_SUBREPOS: self._traverse_subrepos,
-        }
-
     @classmethod
-    def _repo_from_fs_config(
-        cls, **config
-    ) -> Tuple["Repo", Optional["RepoFactory"]]:
-        from dvc.external_repo import erepo_factory, external_repo
+    def _make_repo(cls, **kwargs) -> "Repo":
         from dvc.repo import Repo
 
-        url = config.get(cls.PARAM_REPO_URL)
-        root = config.get(cls.PARAM_REPO_ROOT)
-        assert url or root
+        with Repo.open(uninitialized=True, **kwargs) as repo:
+            return repo
 
-        def _open(*args, **kwargs):
-            # NOTE: if original repo was an erepo (and has a URL),
-            # we cannot use Repo.open() since it will skip erepo
-            # cache/remote setup for local URLs
-            if url is None:
-                return Repo.open(*args, **kwargs)
-            return external_repo(*args, **kwargs)
-
-        cache_dir = config.get(cls.PARAM_CACHE_DIR)
-        cache_config = (
-            {}
-            if not cache_dir
-            else {
-                "cache": {
-                    "dir": cache_dir,
-                    "type": config.get(cls.PARAM_CACHE_TYPES),
-                }
-            }
-        )
-        repo_kwargs: dict = {
-            "rev": config.get(cls.PARAM_REV),
-            "subrepos": config.get(cls.PARAM_SUBREPOS, False),
-            "uninitialized": True,
-        }
-        factory: Optional["RepoFactory"] = None
-        if url is None:
-            repo_kwargs["config"] = cache_config
-        else:
-            repo_kwargs["cache_dir"] = cache_dir
-            factory = erepo_factory(url, root, cache_config)
-
-        with _open(
-            url if url else root,
-            **repo_kwargs,
-        ) as repo:
-            return repo, factory
-
-    def _get_repo(self, path: str) -> "Repo":
+    def _get_repo(self, key: Key) -> "Repo":
         """Returns repo that the path falls in, using prefix.
 
         If the path is already tracked/collected, it just returns the repo.
@@ -216,33 +200,21 @@ class _DvcFileSystem(AbstractFileSystem):  # pylint:disable=abstract-method
         Otherwise, it collects the repos that might be in the path's parents
         and then returns the appropriate one.
         """
-        if not self.repo.fs.path.isin_or_eq(path, self.repo.root_dir):
-            # outside of repo
-            return self.repo
-
-        key = self._get_key(path)
         repo = self._subrepos_trie.get(key)
         if repo:
             return repo
 
         prefix_key, repo = self._subrepos_trie.longest_prefix(key)
-        prefix = self.repo.fs.path.join(
-            self.repo.root_dir,
-            *prefix_key,  # pylint: disable=not-an-iterable
-        )
-
-        parents = (parent for parent in self.repo.fs.path.parents(path))
-        dirs = [path] + list(takewhile(lambda p: p != prefix, parents))
-        dirs.reverse()
-        self._update(dirs, starting_repo=repo)
+        dir_keys = (key[:i] for i in range(len(prefix_key) + 1, len(key) + 1))
+        self._update(dir_keys, starting_repo=repo)
         return self._subrepos_trie.get(key) or self.repo
 
     @wrap_with(threading.Lock())
-    def _update(self, dirs, starting_repo):
+    def _update(self, dir_keys, starting_repo):
         """Checks for subrepo in directories and updates them."""
         repo = starting_repo
-        for d in dirs:
-            key = self._get_key(d)
+        for key in dir_keys:
+            d = self._from_key(key)
             if self._is_dvc_repo(d):
                 repo = self.repo_factory(
                     d,
@@ -265,108 +237,87 @@ class _DvcFileSystem(AbstractFileSystem):  # pylint:disable=abstract-method
         repo_path = self.repo.fs.path.join(dir_path, Repo.DVC_DIR)
         return self.repo.fs.isdir(repo_path)
 
-    def _get_fs_pair(
-        self, path
-    ) -> Tuple[
-        Optional["Repo"],
-        Optional[FileSystem],
-        Optional[str],
-        Optional[DataFileSystem],
-        Optional[str],
-    ]:
+    def _get_subrepo_info(
+        self, key: Key
+    ) -> Tuple["Repo", Optional[DataFileSystem], Key]:
         """
-        Returns a pair of fss based on repo the path falls in, using prefix.
+        Returns information about the subrepo the key is part of.
         """
-        parts = self.path.relparts(path, self.root_marker)
-        if parts and parts[0] == os.curdir:
-            parts = parts[1:]
-
-        fs_path = self.repo.fs.path.join(self.repo.root_dir, *parts)
-        repo = self._get_repo(fs_path)
-        fs = repo.fs
-
-        repo_parts = fs.path.relparts(repo.root_dir, self.repo.root_dir)
-        if repo_parts[0] == os.curdir:
-            repo_parts = repo_parts[1:]
-
-        dvc_parts = parts[len(repo_parts) :]
-        if dvc_parts and dvc_parts[0] == os.curdir:
-            dvc_parts = dvc_parts[1:]
-
-        key = self._get_key(repo.root_dir)
-        dvc_fs = self._datafss.get(key)
-        if dvc_fs:
-            dvc_path = dvc_fs.path.join(*dvc_parts) if dvc_parts else ""
+        repo = self._get_repo(key)
+        repo_key: Key
+        if repo is self.repo:
+            repo_key = ()
+            subkey = key
         else:
-            dvc_path = None
+            repo_key = self._get_key(repo.root_dir)
+            subkey = key[len(repo_key) :]
 
-        return repo, fs, fs_path, dvc_fs, dvc_path
+        dvc_fs = self._datafss.get(repo_key)
+        return repo, dvc_fs, subkey
 
-    def open(
-        self, path, mode="r", encoding="utf-8", **kwargs
+    def _open(
+        self, path, mode="rb", **kwargs
     ):  # pylint: disable=arguments-renamed, arguments-differ
-        if "b" in mode:
-            encoding = None
+        if mode != "rb":
+            raise OSError(errno.EROFS, os.strerror(errno.EROFS))
 
-        _, fs, fs_path, dvc_fs, dvc_path = self._get_fs_pair(path)
+        key = self._get_key_from_relative(path)
+        fs_path = self._from_key(key)
         try:
-            return fs.open(fs_path, mode=mode, encoding=encoding)
+            return self.repo.fs.open(fs_path, mode=mode)
         except FileNotFoundError:
+            _, dvc_fs, subkey = self._get_subrepo_info(key)
             if not dvc_fs:
                 raise
 
-        return dvc_fs.open(dvc_path, mode=mode, encoding=encoding, **kwargs)
+        dvc_path = _get_dvc_path(dvc_fs, subkey)
+        return dvc_fs.open(dvc_path, mode=mode)
 
-    def isdvc(self, path, **kwargs):
-        _, _, _, dvc_fs, dvc_path = self._get_fs_pair(path)
+    def isdvc(self, path, **kwargs) -> bool:
+        """Is this entry dvc-tracked?"""
+        key = self._get_key_from_relative(path)
+        _, dvc_fs, subkey = self._get_subrepo_info(key)
+        dvc_path = _get_dvc_path(dvc_fs, subkey)
         return dvc_fs is not None and dvc_fs.isdvc(dvc_path, **kwargs)
 
     def ls(  # pylint: disable=arguments-differ
         self, path, detail=True, dvc_only=False, **kwargs
     ):
-        repo, fs, fs_path, dvc_fs, dvc_path = self._get_fs_pair(path)
+        key = self._get_key_from_relative(path)
+        repo, dvc_fs, subkey = self._get_subrepo_info(key)
 
-        dvcignore = repo.dvcignore
-        ignore_subrepos = kwargs.get("ignore_subrepos", True)
-
-        names = set()
+        dvc_infos = {}
         if dvc_fs:
             with suppress(FileNotFoundError):
-                for entry in dvc_fs.ls(dvc_path, detail=False):
-                    names.add(dvc_fs.path.name(entry))
+                dvc_path = _get_dvc_path(dvc_fs, subkey)
+                for info in dvc_fs.ls(dvc_path, detail=True):
+                    dvc_infos[dvc_fs.path.name(info["name"])] = info
 
-        if not dvc_only and fs:
+        fs_infos = {}
+        ignore_subrepos = kwargs.get("ignore_subrepos", True)
+        if not dvc_only:
+            fs = self.repo.fs
+            fs_path = self._from_key(key)
             try:
-                for entry in dvcignore.ls(
-                    fs, fs_path, detail=False, ignore_subrepos=ignore_subrepos
+                for info in repo.dvcignore.ls(
+                    fs, fs_path, detail=True, ignore_subrepos=ignore_subrepos
                 ):
-                    names.add(fs.path.name(entry))
+                    fs_infos[fs.path.name(info["name"])] = info
             except (FileNotFoundError, NotADirectoryError):
-                pass
+                pass  # noqa: S110
 
         dvcfiles = kwargs.get("dvcfiles", False)
 
-        def _func(fname):
-            from dvc.dvcfile import is_valid_filename
-            from dvc.ignore import DvcIgnore
-
-            if dvcfiles:
-                return True
-
-            return not (
-                is_valid_filename(fname) or fname == DvcIgnore.DVCIGNORE_FILE
-            )
-
-        names = filter(_func, names)
-
         infos = []
         paths = []
+        names = set(dvc_infos.keys()) | set(fs_infos.keys())
         for name in names:
-            entry_path = self.path.join(path, name)
-            try:
-                info = self.info(entry_path, ignore_subrepos=ignore_subrepos)
-            except FileNotFoundError:
+            if not dvcfiles and _is_dvc_file(name):
                 continue
+
+            entry_path = self.path.join(path, name)
+            info = _merge_info(repo, fs_infos.get(name), dvc_infos.get(name))
+            info["name"] = entry_path
             infos.append(info)
             paths.append(entry_path)
 
@@ -375,48 +326,41 @@ class _DvcFileSystem(AbstractFileSystem):  # pylint:disable=abstract-method
 
         return infos
 
-    def get_file(  # pylint: disable=arguments-differ
-        self, rpath, lpath, callback=DEFAULT_CALLBACK, **kwargs
-    ):
-        _, fs, fs_path, dvc_fs, dvc_path = self._get_fs_pair(rpath)
-
-        if fs:
-            try:
-                fs.get_file(fs_path, lpath, callback=callback, **kwargs)
-                return
-            except FileNotFoundError:
-                if not dvc_fs:
-                    raise
-        dvc_fs.get_file(dvc_path, lpath, callback=callback, **kwargs)
-
     def info(self, path, **kwargs):
-        repo, fs, fs_path, dvc_fs, dvc_path = self._get_fs_pair(path)
-
-        dvcignore = repo.dvcignore
+        key = self._get_key_from_relative(path)
         ignore_subrepos = kwargs.get("ignore_subrepos", True)
+        return self._info(key, path, ignore_subrepos=ignore_subrepos)
+
+    def _info(  # noqa: C901
+        self, key, path, ignore_subrepos=True, check_ignored=True
+    ):
+        repo, dvc_fs, subkey = self._get_subrepo_info(key)
 
         dvc_info = None
         if dvc_fs:
             try:
-                dvc_info = dvc_fs.info(dvc_path)
+                dvc_info = dvc_fs.fs.index.info(subkey)
+                dvc_path = _get_dvc_path(dvc_fs, subkey)
+                dvc_info["name"] = dvc_path
             except FileNotFoundError:
                 pass
 
         fs_info = None
-        if fs:
-            try:
-                fs_info = fs.info(fs_path)
-                if dvcignore.is_ignored(
-                    fs, fs_path, ignore_subrepos=ignore_subrepos
-                ):
-                    fs_info = None
-            except (FileNotFoundError, NotADirectoryError):
-                if not dvc_info:
-                    raise
+        fs = self.repo.fs
+        fs_path = self._from_key(key)
+        try:
+            fs_info = fs.info(fs_path)
+            if check_ignored and repo.dvcignore.is_ignored(
+                fs, fs_path, ignore_subrepos=ignore_subrepos
+            ):
+                fs_info = None
+        except (FileNotFoundError, NotADirectoryError):
+            if not dvc_info:
+                raise
 
         # NOTE: if some parent in fs_path turns out to be a file, it means
         # that the whole repofs branch doesn't exist.
-        if fs and not fs_info and dvc_info:
+        if dvc_info and not fs_info:
             for parent in fs.path.parents(fs_path):
                 try:
                     if fs.info(parent)["type"] != "directory":
@@ -432,47 +376,35 @@ class _DvcFileSystem(AbstractFileSystem):  # pylint:disable=abstract-method
         info["name"] = path
         return info
 
-    def checksum(self, path):
-        _, fs, fs_path, dvc_fs, dvc_path = self._get_fs_pair(path)
 
-        try:
-            return fs.checksum(fs_path)
-        except FileNotFoundError:
-            return dvc_fs.checksum(dvc_path)
-
-
-class DvcFileSystem(FileSystem):
+class DVCFileSystem(FileSystem):
     protocol = "local"
     PARAM_CHECKSUM = "md5"
 
-    def _prepare_credentials(self, **config):
+    def _prepare_credentials(self, **config) -> Dict[str, Any]:
         return config
 
-    @wrap_prop(threading.Lock())
-    @cached_property
-    def fs(self):
-        return _DvcFileSystem(**self.fs_args)
+    @functools.cached_property
+    # pylint: disable-next=invalid-overridden-method
+    def fs(self) -> "DVCFileSystem":
+        return _DVCFileSystem(**self.fs_args)
 
-    def isdvc(self, path, **kwargs):
+    def isdvc(self, path, **kwargs) -> bool:
         return self.fs.isdvc(path, **kwargs)
 
     @property
-    def path(self):  # pylint: disable=invalid-overridden-method
+    def path(self) -> Path:  # pylint: disable=invalid-overridden-method
         return self.fs.path
 
     @property
-    def repo(self):
+    def repo(self) -> "Repo":
         return self.fs.repo
 
     @property
-    def repo_url(self):
+    def repo_url(self) -> str:
         return self.fs.repo_url
 
-    @property
-    def config(self):
-        return self.fs.config
-
-    def from_os_path(self, path):
+    def from_os_path(self, path: str) -> str:
         if os.path.isabs(path):
             path = os.path.relpath(path, self.repo.root_dir)
 

dvc/fs/git.py

@@ -1,27 +1,27 @@
-import threading
-from typing import TYPE_CHECKING, Any
-
-from funcy import cached_property, wrap_prop
+import functools
+from typing import TYPE_CHECKING, Any, Optional
 
 from . import FileSystem
 
 if TYPE_CHECKING:
     from scmrepo.fs import GitFileSystem as FsspecGitFileSystem
-    from scmrepo.git import Git
     from scmrepo.git.objects import GitTrie
 
+    from dvc.scm import Git
+
 
 class GitFileSystem(FileSystem):  # pylint:disable=abstract-method
     """Proxies the repo file access methods to Git objects"""
 
     protocol = "local"
+    PARAM_CHECKSUM = "md5"
 
     def __init__(
         self,
-        path: str = None,
-        rev: str = None,
-        scm: "Git" = None,
-        trie: "GitTrie" = None,
+        path: Optional[str] = None,
+        rev: Optional[str] = None,
+        scm: Optional["Git"] = None,
+        trie: Optional["GitTrie"] = None,
         **kwargs: Any,
     ) -> None:
         from dvc.scm import resolve_rev
@@ -38,15 +38,16 @@ class GitFileSystem(FileSystem):  # pylint:disable=abstract-method
             }
         )
 
-    @wrap_prop(threading.Lock())
-    @cached_property
-    def fs(self) -> "FsspecGitFileSystem":
+    @functools.cached_property
+    def fs(  # pylint: disable=invalid-overridden-method
+        self,
+    ) -> "FsspecGitFileSystem":
         from scmrepo.fs import GitFileSystem as FsspecGitFileSystem
 
         return FsspecGitFileSystem(**self.fs_args)
 
-    @cached_property
-    def path(self):
+    @functools.cached_property
+    def path(self):  # pylint: disable=invalid-overridden-method
         return self.fs.path
 
     @property

dvc/ignore.py

@@ -3,14 +3,17 @@ import os
 import re
 from collections import namedtuple
 from itertools import chain, groupby, takewhile
+from typing import TYPE_CHECKING, List, Optional
 
 from pathspec.patterns import GitWildMatchPattern
 from pathspec.util import normalize_file
 from pygtrie import Trie
 
-from dvc.fs import AnyFSPath, FileSystem, Schemes, localfs
+from dvc.fs import Schemes, localfs
 from dvc.pathspec_math import PatternInfo, merge_patterns
-from dvc.types import List, Optional
+
+if TYPE_CHECKING:
+    from dvc.fs import AnyFSPath, FileSystem
 
 logger = logging.getLogger(__name__)
 
@@ -24,20 +27,27 @@ class DvcIgnore:
 
 class DvcIgnorePatterns(DvcIgnore):
     def __init__(self, pattern_list, dirname, sep):
-        if pattern_list:
-            if isinstance(pattern_list[0], str):
-                pattern_list = [
-                    PatternInfo(pattern, "") for pattern in pattern_list
-                ]
+        from pathspec.patterns.gitwildmatch import _DIR_MARK
+
+        if pattern_list and isinstance(pattern_list[0], str):
+            pattern_list = [
+                PatternInfo(pattern, "") for pattern in pattern_list
+            ]
 
         self.sep = sep
         self.pattern_list = pattern_list
         self.dirname = dirname
 
-        self.regex_pattern_list = [
-            GitWildMatchPattern.pattern_to_regex(pattern_info.patterns)
-            for pattern_info in pattern_list
-        ]
+        self.regex_pattern_list = []
+        for count, pattern in enumerate(pattern_list):
+            pattern, group = GitWildMatchPattern.pattern_to_regex(
+                pattern.patterns
+            )
+            if pattern:
+                pattern = pattern.replace(
+                    f"<{_DIR_MARK}>", f"<{_DIR_MARK}{count}>"
+                )
+                self.regex_pattern_list.append((pattern, group))
 
         self.ignore_spec = [
             (ignore, re.compile("|".join(item[0] for item in group)))
@@ -84,7 +94,7 @@ class DvcIgnorePatterns(DvcIgnore):
             return False
 
         if os.name == "nt":
-            path = normalize_file(path)
+            return normalize_file(path)
         return path
 
     def matches(self, dirname, basename, is_dir=False, details: bool = False):
@@ -195,8 +205,8 @@ class DvcIgnoreFilter:
 
     def _get_key(self, path):
         parts = self.fs.path.relparts(path, self.root_dir)
-        if parts == (".",):
-            parts = ()
+        if parts == (os.curdir,):
+            return ()
         return parts
 
     def _update_trie(self, dirname: str, trie: Trie) -> None:
@@ -299,18 +309,31 @@ class DvcIgnoreFilter:
 
         return [fs_dict[name] for name in chain(dirs, nondirs)]
 
-    def walk(self, fs: FileSystem, path: AnyFSPath, **kwargs):
+    def walk(self, fs: "FileSystem", path: "AnyFSPath", **kwargs):
+        detail = kwargs.get("detail", False)
         ignore_subrepos = kwargs.pop("ignore_subrepos", True)
         if fs.protocol == Schemes.LOCAL:
             for root, dirs, files in fs.walk(path, **kwargs):
-                dirs[:], files[:] = self(
-                    root, dirs, files, ignore_subrepos=ignore_subrepos
-                )
+                if detail:
+                    all_dnames = set(dirs.keys())
+                    all_fnames = set(files.keys())
+                    dnames, fnames = self(
+                        root,
+                        all_dnames,
+                        all_fnames,
+                        ignore_subrepos=ignore_subrepos,
+                    )
+                    list(map(dirs.pop, all_dnames - set(dnames)))
+                    list(map(files.pop, all_fnames - set(fnames)))
+                else:
+                    dirs[:], files[:] = self(
+                        root, dirs, files, ignore_subrepos=ignore_subrepos
+                    )
                 yield root, dirs, files
         else:
             yield from fs.walk(path, **kwargs)
 
-    def find(self, fs: FileSystem, path: AnyFSPath, **kwargs):
+    def find(self, fs: "FileSystem", path: "AnyFSPath", **kwargs):
         if fs.protocol == Schemes.LOCAL:
             for root, _, files in self.walk(fs, path, **kwargs):
                 for file in files:
@@ -366,7 +389,7 @@ class DvcIgnoreFilter:
         return False
 
     def is_ignored_dir(self, path: str, ignore_subrepos: bool = True) -> bool:
-        "Only used in LocalFileSystem"
+        # only used in LocalFileSystem
         path = self.fs.path.abspath(path)
         if path == self.root_dir:
             return False
@@ -374,7 +397,7 @@ class DvcIgnoreFilter:
         return self._is_ignored(path, True, ignore_subrepos=ignore_subrepos)
 
     def is_ignored_file(self, path: str, ignore_subrepos: bool = True) -> bool:
-        "Only used in LocalFileSystem"
+        # only used in LocalFileSystem
         path = self.fs.path.abspath(path)
         return self._is_ignored(path, False, ignore_subrepos=ignore_subrepos)
 
@@ -400,7 +423,7 @@ class DvcIgnoreFilter:
         return _no_match(target)
 
     def is_ignored(
-        self, fs: FileSystem, path: str, ignore_subrepos: bool = True
+        self, fs: "FileSystem", path: str, ignore_subrepos: bool = True
     ) -> bool:
         # NOTE: can't use self.check_ignore(path).match for now, see
         # https://github.com/iterative/dvc/issues/4555

dvc/info.py

@@ -14,15 +14,25 @@ from dvc.scm import SCMError
 from dvc.utils import error_link
 from dvc.utils.pkg import PKG
 
-package = "" if PKG is None else f"({PKG})"
+SUBPROJECTS = (
+    "dvc_data",
+    "dvc_objects",
+    "dvc_render",
+    "dvc_task",
+    "dvclive",
+    "scmrepo",
+)
+package = "" if PKG is None else f" ({PKG})"
 
 
 def get_dvc_info():
+    dvc_version = f"DVC version: {__version__}{package}"
     info = [
-        f"DVC version: {__version__} {package}",
-        "---------------------------------",
+        dvc_version,
+        "-" * len(dvc_version),
         f"Platform: Python {platform.python_version()} on "
         f"{platform.platform()}",
+        f"Subprojects:{_get_subprojects()}",
         f"Supports:{_get_supported_remotes()}",
     ]
 
@@ -67,7 +77,7 @@ def _get_caches(cache):
 
 def _get_remotes(config):
     schemes = (
-        get_fs_cls(get_fs_config(None, config, name=remote)).protocol
+        get_fs_cls(get_fs_config(config, name=remote)).protocol
         for remote in config["remote"]
     )
 
@@ -88,6 +98,18 @@ def _get_linktype_support_info(repo):
     return ", ".join(links)
 
 
+def _get_subprojects():
+    subprojects = []
+    for subproject in SUBPROJECTS:
+        try:
+            version = importlib_metadata.version(subproject)
+            subprojects.append(f"{subproject} = {version}")
+        except ImportError:
+            pass
+
+    return "\n\t" + "\n\t".join(subprojects)
+
+
 def _get_supported_remotes():
     supported_remotes = []
     for scheme in registry:

dvc/lock.py

@@ -116,7 +116,7 @@ class Lock(LockBase):
                 self._lock = zc.lockfile.LockFile(self._lockfile)
         except zc.lockfile.LockError:
             self._lock_failed = True
-            raise LockError(FAILED_TO_LOCK_MESSAGE)
+            raise LockError(FAILED_TO_LOCK_MESSAGE)  # noqa: B904
 
     def lock(self):
         retries = 6
@@ -131,6 +131,7 @@ class Lock(LockBase):
 
         if not self.is_locked:
             raise DvcException("Unlock called on an unlocked lock")
+        assert self._lock
         self._lock.close()
         self._lock = None
 
@@ -185,14 +186,15 @@ class HardlinkLock(flufl.lock.Lock, LockBase):
         try:
             super().lock(timedelta(seconds=DEFAULT_TIMEOUT))
         except flufl.lock.TimeOutError:
-            raise LockError(FAILED_TO_LOCK_MESSAGE)
+            raise LockError(FAILED_TO_LOCK_MESSAGE)  # noqa: B904
 
     def _set_claimfile(self):
         super()._set_claimfile()
 
         if self._tmp_dir is not None:
             # Under Windows file path length is limited so we hash it
-            filename = hashlib.md5(self._claimfile.encode()).hexdigest()
+            hasher = hashlib.md5(self._claimfile.encode())  # noqa: S324
+            filename = hasher.hexdigest()
             self._claimfile = os.path.join(self._tmp_dir, filename + ".lock")
 
 

dvc/logger.py

@@ -68,7 +68,7 @@ class LoggingException(Exception):
 
 def excludeFilter(level):
     class ExcludeLevelFilter(logging.Filter):
-        def filter(self, record):
+        def filter(self, record):  # noqa: A003
             return record.levelno < level
 
     return ExcludeLevelFilter
@@ -94,7 +94,7 @@ class ColorFormatter(logging.Formatter):
         "CRITICAL": colorama.Fore.RED,
     }
 
-    def format(self, record):
+    def format(self, record):  # noqa: A003
         record.message = record.getMessage()
         msg = self.formatMessage(record)
 
@@ -156,7 +156,7 @@ class LoggerHandler(logging.StreamHandler):
                         if not _is_verbose():
                             return
                     except Exception:  # noqa, pylint: disable=broad-except
-                        pass
+                        pass  # noqa: S110
 
             msg = self.format(record)
             Tqdm.write(
@@ -204,7 +204,7 @@ def disable_other_loggers():
     loggerDict = logging.root.manager.loggerDict  # pylint: disable=no-member
     for logger_name, logger in loggerDict.items():
         if logger_name != "dvc" and not logger_name.startswith("dvc."):
-            logger.disabled = True
+            logger.disabled = True  # type: ignore[union-attr]
 
 
 def set_loggers_level(level: int = logging.INFO) -> None:
@@ -213,8 +213,6 @@ def set_loggers_level(level: int = logging.INFO) -> None:
 
 
 def setup(level: int = logging.INFO) -> None:
-    colorama.init()
-
     if level >= logging.DEBUG:
         # Unclosed session errors for asyncio/aiohttp are only available
         # on the tracing mode for extensive debug purposes. They are really
@@ -297,3 +295,8 @@ def setup(level: int = logging.INFO) -> None:
             "disable_existing_loggers": False,
         }
     )
+
+    # NOTE: colorama init needs to go after logging config to avoid potential
+    # conflicts with libs that modify logging (like tensorflow/abseil)
+    # https://github.com/iterative/dvc/issues/8387
+    colorama.init()

dvc/machine/__init__.py

@@ -13,10 +13,10 @@ from typing import (
 )
 
 from dvc.exceptions import DvcException
-from dvc.types import StrPath
 
 if TYPE_CHECKING:
     from dvc.repo import Repo
+    from dvc.types import StrPath
 
     from .backend.base import BaseMachineBackend
 
@@ -76,7 +76,7 @@ class MachineBackends(Mapping):
     def __init__(
         self,
         selected: Optional[Iterable[str]],
-        tmp_dir: StrPath,
+        tmp_dir: "StrPath",
         **kwargs,
     ) -> None:
         selected = selected or list(self.DEFAULT)
@@ -127,6 +127,7 @@ class MachineManager:
         self, repo: "Repo", backends: Optional[Iterable[str]] = None, **kwargs
     ):
         self.repo = repo
+        assert self.repo.tmp_dir
         tmp_dir = os.path.join(self.repo.tmp_dir, "machine")
         self.backends = MachineBackends(backends, tmp_dir=tmp_dir, **kwargs)
 
@@ -167,7 +168,9 @@ class MachineManager:
             except KeyError:
                 from dvc.config import MachineNotFoundError
 
-                raise MachineNotFoundError(f"machine '{name}' doesn't exist")
+                raise MachineNotFoundError(  # noqa: B904
+                    f"machine '{name}' doesn't exist"
+                )
         else:
             conf = kwargs
         return conf
@@ -179,7 +182,9 @@ class MachineManager:
             backend = self.CLOUD_BACKENDS[cloud]
             return self.backends[backend]
         except KeyError:
-            raise NoMachineError(f"Machine platform '{cloud}' unsupported")
+            raise NoMachineError(  # noqa: B904
+                f"Machine platform '{cloud}' unsupported"
+            )
 
     def create(self, name: Optional[str]):
         """Create and start the specified machine instance."""

dvc/machine/backend/base.py

@@ -26,7 +26,7 @@ class BaseMachineBackend(ABC):
     ) -> Iterator[dict]:
         """Iterate over status of all instances of the specified machine."""
 
-    def close(self):
+    def close(self):  # noqa: B027
         pass
 
     @abstractmethod

dvc/machine/backend/terraform.py

@@ -6,7 +6,6 @@ from typing import TYPE_CHECKING, Iterator, Optional
 from dvc_ssh import DEFAULT_PORT, SSHFileSystem
 
 from dvc.exceptions import DvcException
-from dvc.utils.fs import makedirs
 
 from .base import BaseMachineBackend
 
@@ -30,7 +29,7 @@ def _sshfs(resource: dict):
 class TerraformBackend(BaseMachineBackend):
     def __init__(self, tmp_dir: "StrPath", **kwargs):
         super().__init__(tmp_dir, **kwargs)
-        makedirs(tmp_dir, exist_ok=True)
+        os.makedirs(tmp_dir, exist_ok=True)
 
     @contextmanager
     def make_tpi(self, name: str):
@@ -39,7 +38,7 @@ class TerraformBackend(BaseMachineBackend):
 
         try:
             working_dir = os.path.join(self.tmp_dir, name)
-            makedirs(working_dir, exist_ok=True)
+            os.makedirs(working_dir, exist_ok=True)
             yield TPIBackend(working_dir=working_dir)
         except TPIError as exc:
             raise DvcException("TPI operation failed") from exc

dvc/odbmgr.py

@@ -1,5 +1,5 @@
 from dvc.fs import GitFileSystem, Schemes
-from dvc_data.db import get_odb
+from dvc_data.hashfile.db import get_odb
 
 
 def _get_odb(repo, settings, fs=None):
@@ -39,7 +39,7 @@ class ODBManager:
             from dvc.config_schema import LOCAL_COMMON
 
             settings = {"url": config["dir"]}
-            for opt in LOCAL_COMMON.keys():
+            for opt in LOCAL_COMMON:
                 if opt in config:
                     settings[str(opt)] = config.get(opt)
 

dvc/output.py

@@ -1,11 +1,11 @@
 import logging
 import os
 from collections import defaultdict
-from typing import TYPE_CHECKING, Dict, Optional, Set, Type
+from typing import TYPE_CHECKING, Dict, List, Optional, Set, Tuple, Type, cast
 from urllib.parse import urlparse
 
-from funcy import collecting, project
-from voluptuous import And, Any, Coerce, Length, Lower, Required, SetTo
+from funcy import collecting, first, project
+from voluptuous import All, And, Any, Coerce, Length, Lower, Required, SetTo
 
 from dvc import prompt
 from dvc.exceptions import (
@@ -17,24 +17,33 @@ from dvc.exceptions import (
     MergeError,
     RemoteCacheRequiredError,
 )
-from dvc_data import Tree
-from dvc_data import check as ocheck
-from dvc_data import load as oload
-from dvc_data.build import build
-from dvc_data.checkout import checkout
+from dvc.utils.objects import cached_property
+from dvc_data.hashfile import Tree
+from dvc_data.hashfile import check as ocheck
+from dvc_data.hashfile import load as oload
+from dvc_data.hashfile.build import build
+from dvc_data.hashfile.checkout import checkout
 from dvc_data.hashfile.hash_info import HashInfo
 from dvc_data.hashfile.istextfile import istextfile
 from dvc_data.hashfile.meta import Meta
-from dvc_data.transfer import transfer as otransfer
+from dvc_data.hashfile.transfer import transfer as otransfer
+from dvc_data.index import DataIndexEntry
 from dvc_objects.errors import ObjectFormatError
 
+from .annotations import ANNOTATION_FIELDS, ANNOTATION_SCHEMA, Annotation
 from .fs import LocalFileSystem, RemoteMissingDepsError, Schemes, get_cloud_fs
+from .fs.callbacks import DEFAULT_CALLBACK
 from .utils import relpath
 from .utils.fs import path_isin
 
 if TYPE_CHECKING:
+    from dvc_data.hashfile.obj import HashFile
+    from dvc_data.index import DataIndexKey
     from dvc_objects.db import ObjectDB
 
+    from .fs.callbacks import Callback
+    from .ignore import DvcIgnoreFilter
+
 logger = logging.getLogger(__name__)
 
 
@@ -80,9 +89,10 @@ def loadd_from(stage, d_list):
         plot = d.pop(Output.PARAM_PLOT, False)
         persist = d.pop(Output.PARAM_PERSIST, False)
         checkpoint = d.pop(Output.PARAM_CHECKPOINT, False)
-        desc = d.pop(Output.PARAM_DESC, False)
-        live = d.pop(Output.PARAM_LIVE, False)
         remote = d.pop(Output.PARAM_REMOTE, None)
+        annot = {field: d.pop(field, None) for field in ANNOTATION_FIELDS}
+        files = d.pop(Output.PARAM_FILES, None)
+        push = d.pop(Output.PARAM_PUSH, True)
         ret.append(
             _get(
                 stage,
@@ -93,9 +103,10 @@ def loadd_from(stage, d_list):
                 plot=plot,
                 persist=persist,
                 checkpoint=checkpoint,
-                desc=desc,
-                live=live,
                 remote=remote,
+                **annot,
+                files=files,
+                push=push,
             )
         )
     return ret
@@ -109,8 +120,8 @@ def loads_from(
     plot=False,
     persist=False,
     checkpoint=False,
-    live=False,
     remote=None,
+    push=True,
 ):
     return [
         _get(
@@ -122,8 +133,8 @@ def loads_from(
             plot=plot,
             persist=persist,
             checkpoint=checkpoint,
-            live=live,
             remote=remote,
+            push=push,
         )
         for s in s_list
     ]
@@ -134,17 +145,19 @@ def _split_dict(d, keys):
 
 
 def _merge_data(s_list):
-    d = defaultdict(dict)
+    d: Dict[str, Dict] = defaultdict(dict)
     for key in s_list:
         if isinstance(key, str):
             d[key].update({})
             continue
         if not isinstance(key, dict):
-            raise ValueError(f"'{type(key).__name__}' not supported.")
+            raise ValueError(  # noqa: TRY004
+                f"'{type(key).__name__}' not supported."
+            )
 
         for k, flags in key.items():
             if not isinstance(flags, dict):
-                raise ValueError(
+                raise ValueError(  # noqa: TRY004
                     f"Expected dict for '{k}', got: '{type(flags).__name__}'"
                 )
             d[k].update(flags)
@@ -157,29 +170,21 @@ def load_from_pipeline(stage, data, typ="outs"):
         stage.PARAM_OUTS,
         stage.PARAM_METRICS,
         stage.PARAM_PLOTS,
-        stage.PARAM_LIVE,
     ):
         raise ValueError(f"'{typ}' key is not allowed for pipeline files.")
 
     metric = typ == stage.PARAM_METRICS
     plot = typ == stage.PARAM_PLOTS
-    live = typ == stage.PARAM_LIVE
-    if live:
-        # `live` is single object
-        data = [data]
 
     d = _merge_data(data)
 
     for path, flags in d.items():
-        plt_d, live_d = {}, {}
+        plt_d = {}
         if plot:
             from dvc.schema import PLOT_PROPS
 
             plt_d, flags = _split_dict(flags, keys=PLOT_PROPS.keys())
-        if live:
-            from dvc.schema import LIVE_PROPS
 
-            live_d, flags = _split_dict(flags, keys=LIVE_PROPS.keys())
         extra = project(
             flags,
             [
@@ -187,6 +192,8 @@ def load_from_pipeline(stage, data, typ="outs"):
                 Output.PARAM_PERSIST,
                 Output.PARAM_CHECKPOINT,
                 Output.PARAM_REMOTE,
+                Output.PARAM_PUSH,
+                *ANNOTATION_FIELDS,
             ],
         )
 
@@ -196,11 +203,34 @@ def load_from_pipeline(stage, data, typ="outs"):
             info={},
             plot=plt_d or plot,
             metric=metric,
-            live=live_d or live,
             **extra,
         )
 
 
+def split_file_meta_from_cloud(entry: Dict) -> Dict:
+    if remote_name := entry.pop(Meta.PARAM_REMOTE, None):
+        remote_meta = {}
+        for key in (
+            S3_PARAM_CHECKSUM,
+            HDFS_PARAM_CHECKSUM,
+            Meta.PARAM_VERSION_ID,
+        ):
+            if value := entry.pop(key, None):
+                remote_meta[key] = value
+
+        if remote_meta:
+            entry[Output.PARAM_CLOUD] = {remote_name: remote_meta}
+    return entry
+
+
+def merge_file_meta_from_cloud(entry: Dict) -> Dict:
+    cloud_meta = entry.pop(Output.PARAM_CLOUD, {})
+    if remote_name := first(cloud_meta):
+        entry.update(cloud_meta[remote_name])
+        entry[Meta.PARAM_REMOTE] = remote_name
+    return entry
+
+
 class OutputDoesNotExistError(DvcException):
     def __init__(self, path):
         msg = f"output '{path}' does not exist"
@@ -240,6 +270,7 @@ class Output:
     PARAM_PATH = "path"
     PARAM_CACHE = "cache"
     PARAM_CHECKPOINT = "checkpoint"
+    PARAM_FILES = "files"
     PARAM_METRIC = "metric"
     PARAM_METRIC_TYPE = "type"
     PARAM_METRIC_XPATH = "xpath"
@@ -252,11 +283,9 @@ class Output:
     PARAM_PLOT_TITLE = "title"
     PARAM_PLOT_HEADER = "header"
     PARAM_PERSIST = "persist"
-    PARAM_DESC = "desc"
-    PARAM_LIVE = "live"
-    PARAM_LIVE_SUMMARY = "summary"
-    PARAM_LIVE_HTML = "html"
     PARAM_REMOTE = "remote"
+    PARAM_PUSH = "push"
+    PARAM_CLOUD = "cloud"
 
     METRIC_SCHEMA = Any(
         None,
@@ -267,10 +296,10 @@ class Output:
         },
     )
 
-    DoesNotExistError = OutputDoesNotExistError  # type: Type[DvcException]
-    IsNotFileOrDirError = OutputIsNotFileOrDirError  # type: Type[DvcException]
-    IsStageFileError = OutputIsStageFileError  # type: Type[DvcException]
-    IsIgnoredError = OutputIsIgnoredError  # type: Type[DvcException]
+    DoesNotExistError: Type[DvcException] = OutputDoesNotExistError
+    IsNotFileOrDirError: Type[DvcException] = OutputIsNotFileOrDirError
+    IsStageFileError: Type[DvcException] = OutputIsStageFileError
+    IsIgnoredError: Type[DvcException] = OutputIsIgnoredError
 
     def __init__(
         self,
@@ -282,13 +311,34 @@ class Output:
         plot=False,
         persist=False,
         checkpoint=False,
-        live=False,
         desc=None,
+        type=None,  # noqa: A002, pylint: disable=redefined-builtin
+        labels=None,
+        meta=None,
         remote=None,
         repo=None,
+        fs_config=None,
+        files: Optional[List[Dict[str, Any]]] = None,
+        push: bool = True,
     ):
+        self.annot = Annotation(
+            desc=desc, type=type, labels=labels or [], meta=meta or {}
+        )
         self.repo = stage.repo if not repo and stage else repo
-        fs_cls, fs_config, fs_path = get_cloud_fs(self.repo, url=path)
+        meta_d = merge_file_meta_from_cloud(info or {})
+        meta = Meta.from_dict(meta_d)
+        # NOTE: when version_aware is not passed into get_cloud_fs, it will be
+        # set based on whether or not path is versioned
+        fs_kwargs = {}
+        if meta.version_id or files:
+            fs_kwargs["version_aware"] = True
+
+        if fs_config is not None:
+            fs_kwargs.update(**fs_config)
+
+        fs_cls, fs_config, fs_path = get_cloud_fs(
+            self.repo, url=path, **fs_kwargs
+        )
         self.fs = fs_cls(**fs_config)
 
         if (
@@ -297,7 +347,7 @@ class Output:
             and isinstance(stage.repo.fs, LocalFileSystem)
             and path_isin(path, stage.repo.root_dir)
         ):
-            self.def_path = relpath(path, stage.wdir)
+            self.def_path: str = relpath(path, stage.wdir)
             self.fs = stage.repo.fs
         else:
             self.def_path = path
@@ -320,21 +370,56 @@ class Output:
         # By resolved path, which contains actual location,
         # should be absolute and don't contain remote:// refs.
         self.stage = stage
-        self.meta = Meta.from_dict(info)
-        self.hash_info = HashInfo.from_dict(info)
+        self.meta = meta
+
+        if files is not None:
+            files = [merge_file_meta_from_cloud(f) for f in files]
+        self.files = files
         self.use_cache = False if self.IS_DEPENDENCY else cache
         self.metric = False if self.IS_DEPENDENCY else metric
         self.plot = False if self.IS_DEPENDENCY else plot
         self.persist = persist
         self.checkpoint = checkpoint
-        self.live = live
-        self.desc = desc
+        self.can_push = push
 
         self.fs_path = self._parse_path(self.fs, fs_path)
-        self.obj = None
+        self.obj: Optional["HashFile"] = None
 
         self.remote = remote
 
+        if self.fs.version_aware:
+            _, version_id = self.fs.path.coalesce_version(
+                self.def_path, self.meta.version_id
+            )
+            self.meta.version_id = version_id
+
+        if self.is_in_repo:
+            self.hash_name = "md5"
+        else:
+            self.hash_name = self.fs.PARAM_CHECKSUM
+
+        self.hash_info = HashInfo(
+            name=self.hash_name,
+            value=getattr(self.meta, self.hash_name, None),
+        )
+        self._compute_meta_hash_info_from_files()
+
+    def _compute_meta_hash_info_from_files(self) -> None:
+        if self.files:
+            tree = Tree.from_list(self.files, hash_name=self.hash_name)
+            tree.digest()
+            self.hash_info = tree.hash_info
+            self.meta.isdir = True
+            self.meta.nfiles = len(self.files)
+            self.meta.size = sum(f.get("size") for f in self.files)
+            self.meta.remote = first(f.get("remote") for f in self.files)
+        elif self.meta.nfiles or self.hash_info and self.hash_info.isdir:
+            self.meta.isdir = True
+            if not self.hash_info and self.hash_name != "md5":
+                md5 = getattr(self.meta, "md5", None)
+                if md5:
+                    self.hash_info = HashInfo("md5", md5)
+
     def _parse_path(self, fs, fs_path):
         parsed = urlparse(self.def_path)
         if (
@@ -375,6 +460,12 @@ class Output:
 
         return self.fs.path.relpath(self.fs_path, self.repo.root_dir)
 
+    def clear(self):
+        self.hash_info = HashInfo.from_dict({})
+        self.meta = Meta.from_dict({})
+        self.obj = None
+        self.files = None
+
     @property
     def protocol(self):
         return self.fs.protocol
@@ -414,31 +505,36 @@ class Output:
         )
 
     def get_hash(self):
+        _, hash_info = self._get_hash_meta()
+        return hash_info
+
+    def _get_hash_meta(self):
         if self.use_cache:
             odb = self.odb
-            name = self.odb.fs.PARAM_CHECKSUM
         else:
             odb = self.repo.odb.local
-            name = self.fs.PARAM_CHECKSUM
-        _, _, obj = build(
+        _, meta, obj = build(
             odb,
             self.fs_path,
             self.fs,
-            name,
+            self.hash_name,
             ignore=self.dvcignore,
             dry_run=not self.use_cache,
         )
-        return obj.hash_info
+        return meta, obj.hash_info
+
+    def get_meta(self) -> Meta:
+        meta, _ = self._get_hash_meta()
+        return meta
 
     @property
     def is_dir_checksum(self):
         return self.hash_info.isdir
 
     def _is_path_dvcignore(self, path) -> bool:
-        if not self.IS_DEPENDENCY and self.dvcignore:
-            if self.dvcignore.is_ignored(self.fs, path, ignore_subrepos=False):
-                return True
-        return False
+        if self.IS_DEPENDENCY or not self.dvcignore:
+            return False
+        return self.dvcignore.is_ignored(self.fs, path, ignore_subrepos=False)
 
     @property
     def exists(self):
@@ -447,6 +543,37 @@ class Output:
 
         return self.fs.exists(self.fs_path)
 
+    @cached_property
+    def index_key(self) -> Tuple[str, "DataIndexKey"]:
+        if self.is_in_repo:
+            workspace = "repo"
+            key = self.repo.fs.path.relparts(self.fs_path, self.repo.root_dir)
+        else:
+            workspace = self.fs.protocol
+            no_drive = self.fs.path.flavour.splitdrive(self.fs_path)[1]
+            key = self.fs.path.parts(no_drive)[1:]
+        return workspace, key
+
+    def get_entry(self) -> "DataIndexEntry":
+        if self.files and not self.obj:
+            self.obj = self.get_obj()
+
+        entry = DataIndexEntry(
+            meta=self.meta,
+            obj=self.obj,
+            hash_info=self.hash_info,
+        )
+        if self.stage.is_import and not self.stage.is_repo_import:
+            dep = self.stage.deps[0]
+            entry.fs = dep.fs
+            entry.path = dep.fs_path
+            entry.meta = dep.meta
+            if not entry.obj:
+                if not dep.obj and dep.files:
+                    dep.obj = dep.get_obj()
+                entry.obj = dep.obj
+        return entry
+
     def changed_checksum(self):
         return self.hash_info != self.get_hash()
 
@@ -464,7 +591,12 @@ class Output:
         except (FileNotFoundError, ObjectFormatError):
             return True
 
-    def workspace_status(self):
+    def changed_meta(self) -> bool:
+        if self.fs.version_aware and self.meta.version_id:
+            return self.meta.version_id != self.get_meta().version_id
+        return False
+
+    def workspace_status(self) -> Dict[str, str]:
         if not self.exists:
             return {str(self): "deleted"}
 
@@ -476,40 +608,40 @@ class Output:
 
         return {}
 
-    def status(self):
+    def status(self) -> Dict[str, str]:
         if self.hash_info and self.use_cache and self.changed_cache():
             return {str(self): "not in cache"}
 
         return self.workspace_status()
 
-    def changed(self):
+    def changed(self) -> bool:
         status = self.status()
         logger.debug(str(status))
         return bool(status)
 
     @property
-    def dvcignore(self):
+    def dvcignore(self) -> Optional["DvcIgnoreFilter"]:
         if self.fs.protocol == "local":
             return self.repo.dvcignore
         return None
 
     @property
-    def is_empty(self):
+    def is_empty(self) -> bool:
         return self.fs.is_empty(self.fs_path)
 
-    def isdir(self):
+    def isdir(self) -> bool:
         if self._is_path_dvcignore(self.fs_path):
             return False
         return self.fs.isdir(self.fs_path)
 
-    def isfile(self):
+    def isfile(self) -> bool:
         if self._is_path_dvcignore(self.fs_path):
             return False
         return self.fs.isfile(self.fs_path)
 
     # pylint: disable=no-member
 
-    def ignore(self):
+    def ignore(self) -> None:
         if not self.use_scm_ignore:
             return
 
@@ -518,7 +650,7 @@ class Output:
 
         self.repo.scm_context.ignore(self.fspath)
 
-    def ignore_remove(self):
+    def ignore_remove(self) -> None:
         if not self.use_scm_ignore:
             return
 
@@ -526,11 +658,11 @@ class Output:
 
     # pylint: enable=no-member
 
-    def save(self):
+    def save(self) -> None:
         if not self.exists:
             raise self.DoesNotExistError(self)
 
-        if not self.isfile and not self.isdir:
+        if not self.isfile() and not self.isdir():
             raise self.IsNotFileOrDirError(self)
 
         if self.is_empty:
@@ -541,52 +673,50 @@ class Output:
         if self.metric:
             self.verify_metric()
 
-        if not self.use_cache:
-            _, self.meta, obj = build(
+        if self.use_cache:
+            _, self.meta, self.obj = build(
+                self.odb,
+                self.fs_path,
+                self.fs,
+                self.hash_name,
+                ignore=self.dvcignore,
+            )
+        else:
+            _, self.meta, self.obj = build(
                 self.repo.odb.local,
                 self.fs_path,
                 self.fs,
-                self.fs.PARAM_CHECKSUM,
+                self.hash_name,
                 ignore=self.dvcignore,
                 dry_run=True,
             )
-            self.hash_info = obj.hash_info
             if not self.IS_DEPENDENCY:
                 logger.debug(
                     "Output '%s' doesn't use cache. Skipping saving.", self
                 )
-            return
 
-        assert not self.IS_DEPENDENCY
-
-        _, self.meta, self.obj = build(
-            self.odb,
-            self.fs_path,
-            self.fs,
-            self.odb.fs.PARAM_CHECKSUM,
-            ignore=self.dvcignore,
-        )
         self.hash_info = self.obj.hash_info
+        self.files = None
 
-    def set_exec(self):
+    def set_exec(self) -> None:
         if self.isfile() and self.meta.isexec:
             self.odb.set_exec(self.fs_path)
 
-    def _checkout(self, *args, **kwargs):
-        from dvc_data.checkout import CheckoutError as _CheckoutError
-        from dvc_data.checkout import LinkError, PromptError
+    def _checkout(self, *args, **kwargs) -> Optional[bool]:
+        from dvc_data.hashfile.checkout import CheckoutError as _CheckoutError
+        from dvc_data.hashfile.checkout import LinkError, PromptError
 
         kwargs.setdefault("ignore", self.dvcignore)
         try:
             return checkout(*args, **kwargs)
         except PromptError as exc:
-            raise ConfirmRemoveError(exc.path)
+            raise ConfirmRemoveError(exc.path)  # noqa: B904
         except LinkError as exc:
-            raise CacheLinkError([exc.path])
+            raise CacheLinkError([exc.path])  # noqa: B904
         except _CheckoutError as exc:
-            raise CheckoutError(exc.paths)
+            raise CheckoutError(exc.paths, {})  # noqa: B904
 
-    def commit(self, filter_info=None):
+    def commit(self, filter_info=None) -> None:
         if not self.exists:
             raise self.DoesNotExistError(self)
 
@@ -605,7 +735,7 @@ class Output:
                     self.odb,
                     filter_info or self.fs_path,
                     self.fs,
-                    self.odb.fs.PARAM_CHECKSUM,
+                    self.hash_name,
                     ignore=self.dvcignore,
                 )
                 otransfer(
@@ -626,7 +756,7 @@ class Output:
             )
             self.set_exec()
 
-    def _commit_granular_dir(self, filter_info):
+    def _commit_granular_dir(self, filter_info) -> Optional["HashFile"]:
         prefix = self.fs.path.parts(
             self.fs.path.relpath(filter_info, self.fs_path)
         )
@@ -634,10 +764,11 @@ class Output:
             self.odb,
             self.fs_path,
             self.fs,
-            self.odb.fs.PARAM_CHECKSUM,
+            self.hash_name,
             ignore=self.dvcignore,
         )
-        save_obj = save_obj.filter(prefix)
+        save_obj = cast(Tree, save_obj)
+        save_obj = cast(Tree, save_obj.filter(prefix))
         checkout_obj = save_obj.get_obj(self.odb, prefix)
         otransfer(
             staging,
@@ -648,8 +779,19 @@ class Output:
         )
         return checkout_obj
 
-    def dumpd(self):
-        ret = {**self.hash_info.to_dict(), **self.meta.to_dict()}
+    def dumpd(self, **kwargs):  # noqa: C901
+        ret: Dict[str, Any] = {}
+        with_files = (
+            (not self.IS_DEPENDENCY or self.stage.is_import)
+            and self.hash_info.isdir
+            and (kwargs.get("with_files") or self.files is not None)
+        )
+
+        if not with_files:
+            meta_d = self.meta.to_dict()
+            meta_d.pop("isdir", None)
+            ret.update(self.hash_info.to_dict())
+            ret.update(split_file_meta_from_cloud(meta_d))
 
         if self.is_in_repo:
             path = self.fs.path.as_posix(
@@ -660,40 +802,44 @@ class Output:
 
         ret[self.PARAM_PATH] = path
 
-        if self.IS_DEPENDENCY:
-            return ret
+        if not self.IS_DEPENDENCY:
+            ret.update(self.annot.to_dict())
+            if not self.use_cache:
+                ret[self.PARAM_CACHE] = self.use_cache
 
-        if self.desc:
-            ret[self.PARAM_DESC] = self.desc
-
-        if not self.use_cache:
-            ret[self.PARAM_CACHE] = self.use_cache
-
-        if isinstance(self.metric, dict):
             if (
-                self.PARAM_METRIC_XPATH in self.metric
+                isinstance(self.metric, dict)
+                and self.PARAM_METRIC_XPATH in self.metric
                 and not self.metric[self.PARAM_METRIC_XPATH]
             ):
                 del self.metric[self.PARAM_METRIC_XPATH]
 
-        if self.metric:
-            ret[self.PARAM_METRIC] = self.metric
+            if self.metric:
+                ret[self.PARAM_METRIC] = self.metric
 
-        if self.plot:
-            ret[self.PARAM_PLOT] = self.plot
+            if self.plot:
+                ret[self.PARAM_PLOT] = self.plot
 
-        if self.persist:
-            ret[self.PARAM_PERSIST] = self.persist
+            if self.persist:
+                ret[self.PARAM_PERSIST] = self.persist
 
-        if self.checkpoint:
-            ret[self.PARAM_CHECKPOINT] = self.checkpoint
+            if self.checkpoint:
+                ret[self.PARAM_CHECKPOINT] = self.checkpoint
 
-        if self.live:
-            ret[self.PARAM_LIVE] = self.live
+            if self.remote:
+                ret[self.PARAM_REMOTE] = self.remote
 
-        if self.remote:
-            ret[self.PARAM_REMOTE] = self.remote
+            if not self.can_push:
+                ret[self.PARAM_PUSH] = self.can_push
 
+        if with_files:
+            obj = self.obj or self.get_obj()
+            if obj:
+                obj = cast("Tree", obj)
+                ret[self.PARAM_FILES] = [
+                    split_file_meta_from_cloud(f)
+                    for f in obj.as_list(with_meta=True)
+                ]
         return ret
 
     def verify_metric(self):
@@ -717,47 +863,48 @@ class Output:
                 f"binary file '{self.fs_path}' cannot be used as metrics."
             )
 
-    def download(self, to, jobs=None):
-        from dvc.fs.callbacks import Callback
-
-        with Callback.as_tqdm_callback(
-            desc=f"Downloading {self.fs.path.name(self.fs_path)}",
-            unit="files",
-        ) as cb:
-            self.fs.get(self.fs_path, to.fs_path, batch_size=jobs, callback=cb)
-
-    def get_obj(self, filter_info=None, **kwargs):
+    def get_obj(
+        self, filter_info: Optional[str] = None, **kwargs
+    ) -> Optional["HashFile"]:
+        obj: Optional["HashFile"] = None
         if self.obj:
             obj = self.obj
         elif self.hash_info:
-            try:
-                obj = oload(self.odb, self.hash_info)
-            except FileNotFoundError:
-                return None
+            if self.files:
+                tree = Tree.from_list(self.files, hash_name=self.hash_name)
+                tree.digest()
+                obj = tree
+            else:
+                try:
+                    obj = oload(self.odb, self.hash_info)
+                except (FileNotFoundError, ObjectFormatError):
+                    return None
         else:
             return None
 
+        assert obj
         fs_path = self.fs.path
         if filter_info and filter_info != self.fs_path:
             prefix = fs_path.relparts(filter_info, self.fs_path)
+            obj = cast(Tree, obj)
             obj = obj.get_obj(self.odb, prefix)
 
         return obj
 
     def checkout(
         self,
-        force=False,
-        progress_callback=None,
-        relink=False,
-        filter_info=None,
-        allow_missing=False,
-        checkpoint_reset=False,
+        force: bool = False,
+        progress_callback: "Callback" = DEFAULT_CALLBACK,
+        relink: bool = False,
+        filter_info: Optional[str] = None,
+        allow_missing: bool = False,
+        checkpoint_reset: bool = False,
         **kwargs,
-    ):
+    ) -> Optional[Tuple[bool, Optional[bool]]]:
         if not self.use_cache:
-            if progress_callback:
-                progress_callback(
-                    self.fs_path, self.get_files_number(filter_info)
+            if progress_callback != DEFAULT_CALLBACK:
+                progress_callback.relative_update(
+                    self.get_files_number(filter_info)
                 )
             return None
 
@@ -794,7 +941,7 @@ class Output:
         return added, False if added else modified
 
     def remove(self, ignore_remove=False):
-        self.fs.remove(self.fs_path)
+        self.fs.remove(self.fs_path, recursive=True)
         if self.protocol != Schemes.LOCAL:
             return
 
@@ -853,6 +1000,7 @@ class Output:
         )
 
         self.hash_info = obj.hash_info
+        self.files = None
         return obj
 
     def get_files_number(self, filter_info=None):
@@ -915,7 +1063,7 @@ class Output:
                 "Would you like to continue? Use '-f' to force."
             )
             if not force and not prompt.confirm(msg.format(self.fs_path)):
-                raise CollectCacheError(
+                raise CollectCacheError(  # noqa: B904
                     "unable to fully collect used cache"
                     " without cache for directory '{}'".format(self)
                 )
@@ -923,13 +1071,15 @@ class Output:
 
         obj = self.get_obj()
         if filter_info and filter_info != self.fs_path:
+            assert obj
             prefix = self.fs.path.parts(
                 self.fs.path.relpath(filter_info, self.fs_path)
             )
-            obj = obj.filter(prefix)
-        return obj
+            obj = cast(Tree, obj)
+            return obj.filter(prefix)
+        return cast(Tree, obj)
 
-    def get_used_objs(
+    def get_used_objs(  # noqa: C901
         self, **kwargs
     ) -> Dict[Optional["ObjectDB"], Set["HashInfo"]]:
         """Return filtered set of used object IDs for this out."""
@@ -937,9 +1087,15 @@ class Output:
         if not self.use_cache:
             return {}
 
+        push: bool = kwargs.pop("push", False)
         if self.stage.is_repo_import:
+            if push:
+                return {}
             return self.get_used_external(**kwargs)
 
+        if push and not self.can_push:
+            return {}
+
         if not self.hash_info:
             msg = (
                 "Output '{}'({}) is missing version info. "
@@ -959,6 +1115,7 @@ class Output:
             logger.warning(msg)
             return {}
 
+        obj: Optional["HashFile"]
         if self.is_dir_checksum:
             obj = self._collect_used_dir_cache(**kwargs)
         else:
@@ -1015,7 +1172,7 @@ class Output:
         other = out.dumpd()
 
         ignored = [
-            self.fs.PARAM_CHECKSUM,
+            self.hash_name,
             Meta.PARAM_SIZE,
             Meta.PARAM_NFILES,
         ]
@@ -1034,9 +1191,9 @@ class Output:
                 "unable to auto-merge outputs that are not directories"
             )
 
-    def merge(self, ancestor, other):
-        from dvc_data.objects.tree import MergeError as TreeMergeError
-        from dvc_data.objects.tree import du, merge
+    def merge(self, ancestor, other, allowed=None):
+        from dvc_data.hashfile.tree import MergeError as TreeMergeError
+        from dvc_data.hashfile.tree import du, merge
 
         assert other
 
@@ -1051,7 +1208,11 @@ class Output:
 
         try:
             merged = merge(
-                self.odb, ancestor_info, self.hash_info, other.hash_info
+                self.odb,
+                ancestor_info,
+                self.hash_info,
+                other.hash_info,
+                allowed=allowed,
             )
         except TreeMergeError as exc:
             raise MergeError(str(exc)) from exc
@@ -1059,6 +1220,7 @@ class Output:
         self.odb.add(merged.path, merged.fs, merged.oid)
 
         self.hash_info = merged.hash_info
+        self.files = None
         self.meta = Meta(
             size=du(self.odb, merged),
             nfiles=len(merged),
@@ -1074,28 +1236,74 @@ class Output:
 
     @property
     def is_metric(self) -> bool:
-        return bool(self.metric) or bool(self.live)
+        return bool(self.metric)
 
     @property
     def is_plot(self) -> bool:
-        return bool(self.plot) or bool(self.live)
+        return bool(self.plot)
 
+    def restore_fields(self, other: "Output"):
+        """Restore attributes that need to be preserved when serialized."""
+        self.annot = other.annot
+        self.remote = other.remote
+        self.can_push = other.can_push
+
+    def merge_version_meta(self, other: "Output"):
+        """Merge version meta for files which are unchanged from other."""
+        if not self.hash_info:
+            return
+        if self.hash_info.isdir:
+            return self._merge_dir_version_meta(other)
+        if self.hash_info != other.hash_info:
+            return
+        self.meta = other.meta
+
+    def _merge_dir_version_meta(self, other: "Output"):
+        from dvc_data.hashfile.tree import update_meta
+
+        if not self.obj or not other.hash_info.isdir:
+            return
+        other_obj = other.obj if other.obj is not None else other.get_obj()
+        assert isinstance(self.obj, Tree)
+        assert isinstance(other_obj, Tree)
+        updated = update_meta(self.obj, other_obj)
+        assert updated.hash_info == self.obj.hash_info
+        self.obj = updated
+        self.files = updated.as_list(with_meta=True)
+
+
+META_SCHEMA = {
+    Meta.PARAM_SIZE: int,
+    Meta.PARAM_NFILES: int,
+    Meta.PARAM_ISEXEC: bool,
+    Meta.PARAM_VERSION_ID: str,
+}
+
+CLOUD_SCHEMA = All({str: {**META_SCHEMA, **CHECKSUMS_SCHEMA}}, Length(max=1))
 
 ARTIFACT_SCHEMA = {
     **CHECKSUMS_SCHEMA,
+    **META_SCHEMA,
     Required(Output.PARAM_PATH): str,
     Output.PARAM_PLOT: bool,
     Output.PARAM_PERSIST: bool,
     Output.PARAM_CHECKPOINT: bool,
-    Meta.PARAM_SIZE: int,
-    Meta.PARAM_NFILES: int,
-    Meta.PARAM_ISEXEC: bool,
+    Output.PARAM_CLOUD: CLOUD_SCHEMA,
+}
+
+DIR_FILES_SCHEMA: Dict[str, Any] = {
+    **CHECKSUMS_SCHEMA,
+    **META_SCHEMA,
+    Required(Tree.PARAM_RELPATH): str,
+    Output.PARAM_CLOUD: CLOUD_SCHEMA,
 }
 
 SCHEMA = {
     **ARTIFACT_SCHEMA,
+    **ANNOTATION_SCHEMA,
     Output.PARAM_CACHE: bool,
     Output.PARAM_METRIC: Output.METRIC_SCHEMA,
-    Output.PARAM_DESC: str,
     Output.PARAM_REMOTE: str,
+    Output.PARAM_PUSH: bool,
+    Output.PARAM_FILES: [DIR_FILES_SCHEMA],
 }

dvc/parsing/__init__.py

@@ -14,10 +14,11 @@ from typing import (
     Union,
 )
 
-from funcy import cached_property, collecting, first, isa, join, reraise
+from funcy import collecting, first, isa, join, reraise
 
 from dvc.exceptions import DvcException
 from dvc.parsing.interpolate import ParseError
+from dvc.utils.objects import cached_property
 
 from .context import (
     Context,
@@ -25,7 +26,6 @@ from .context import (
     KeyNotInContext,
     MergeError,
     Node,
-    SeqOrMap,
     VarsAlreadyLoaded,
 )
 from .interpolate import (
@@ -36,9 +36,13 @@ from .interpolate import (
 )
 
 if TYPE_CHECKING:
-    from typing_extensions import NoReturn
+    from typing import NoReturn
 
     from dvc.repo import Repo
+    from dvc.types import DictStrAny
+
+    from .context import SeqOrMap
+
 
 logger = logging.getLogger(__name__)
 
@@ -52,7 +56,6 @@ DO_KWD = "do"
 DEFAULT_PARAMS_FILE = "params.yaml"
 
 JOIN = "@"
-DictStr = Dict[str, Any]
 
 
 class ResolveError(DvcException):
@@ -81,7 +84,7 @@ def format_and_raise(exc: Exception, msg: str, path: str) -> "NoReturn":
 
 
 def _reraise_err(
-    exc_cls: Type[Exception], *args, from_exc: Exception = None
+    exc_cls: Type[Exception], *args, from_exc: Optional[Exception] = None
 ) -> "NoReturn":
     err = exc_cls(*args)
     if from_exc and logger.isEnabledFor(logging.DEBUG):
@@ -90,7 +93,7 @@ def _reraise_err(
 
 
 def check_syntax_errors(
-    definition: DictStr, name: str, path: str, where: str = "stages"
+    definition: "DictStrAny", name: str, path: str, where: str = "stages"
 ):
     for key, d in definition.items():
         try:
@@ -109,8 +112,8 @@ def split_foreach_name(name: str) -> Tuple[str, Optional[str]]:
     return group, first(keys)
 
 
-def check_interpolations(data: DictStr, where: str, path: str):
-    def func(s: DictStr) -> None:
+def check_interpolations(data: "DictStrAny", where: str, path: str):
+    def func(s: "DictStrAny") -> None:
         if is_interpolated_string(s):
             raise ResolveError(
                 _format_preamble(f"'{where}'", path)
@@ -124,7 +127,7 @@ Definition = Union["ForeachDefinition", "EntryDefinition"]
 
 
 def make_definition(
-    resolver: "DataResolver", name: str, definition: DictStr, **kwargs
+    resolver: "DataResolver", name: str, definition: "DictStrAny", **kwargs
 ) -> Definition:
     args = resolver, resolver.context, name, definition
     if FOREACH_KWD in definition:
@@ -193,7 +196,7 @@ class DataResolver:
     def has_key(self, key: str):
         return self._has_group_and_key(*split_foreach_name(key))
 
-    def _has_group_and_key(self, group: str, key: str = None):
+    def _has_group_and_key(self, group: str, key: Optional[str] = None):
         try:
             definition = self.definitions[group]
         except KeyError:
@@ -223,7 +226,7 @@ class EntryDefinition:
         resolver: DataResolver,
         context: Context,
         name: str,
-        definition: DictStr,
+        definition: "DictStrAny",
         where: str = STAGES_KWD,
     ):
         self.resolver = resolver
@@ -235,7 +238,7 @@ class EntryDefinition:
         self.where = where
 
     def _resolve_wdir(
-        self, context: Context, name: str, wdir: str = None
+        self, context: Context, name: str, wdir: Optional[str] = None
     ) -> str:
         if not wdir:
             return self.wdir
@@ -252,7 +255,7 @@ class EntryDefinition:
         except ContextError as exc:
             format_and_raise(exc, f"stage '{self.name}'", self.relpath)
 
-    def resolve_stage(self, skip_checks: bool = False) -> DictStr:
+    def resolve_stage(self, skip_checks: bool = False) -> "DictStrAny":
         context = self.context
         name = self.name
         if not skip_checks:
@@ -300,7 +303,7 @@ class EntryDefinition:
 
     def _resolve(
         self, context: "Context", value: Any, key: str, skip_checks: bool
-    ) -> DictStr:
+    ) -> "DictStrAny":
         try:
             return context.resolve(
                 value, skip_interpolation_checks=skip_checks, key=key
@@ -322,7 +325,7 @@ class ForeachDefinition:
         resolver: DataResolver,
         context: Context,
         name: str,
-        definition: DictStr,
+        definition: "DictStrAny",
         where: str = STAGES_KWD,
     ):
         self.resolver = resolver
@@ -347,7 +350,7 @@ class ForeachDefinition:
     def resolved_iterable(self):
         return self._resolve_foreach_data()
 
-    def _resolve_foreach_data(self) -> SeqOrMap:
+    def _resolve_foreach_data(self) -> "SeqOrMap":
         try:
             iterable = self.context.resolve(self.foreach_data, unwrap=False)
         except (ContextError, ParseError) as exc:
@@ -415,13 +418,13 @@ class ForeachDefinition:
     def _generate_name(self, key: str) -> str:
         return f"{self.name}{JOIN}{key}"
 
-    def resolve_all(self) -> DictStr:
+    def resolve_all(self) -> "DictStrAny":
         return join(map(self.resolve_one, self.normalized_iterable))
 
-    def resolve_one(self, key: str) -> DictStr:
+    def resolve_one(self, key: str) -> "DictStrAny":
         return self._each_iter(key)
 
-    def _each_iter(self, key: str) -> DictStr:
+    def _each_iter(self, key: str) -> "DictStrAny":
         err_message = f"Could not find '{key}' in foreach group '{self.name}'"
         with reraise(KeyError, EntryNotFound(err_message)):
             value = self.normalized_iterable[key]

dvc/parsing/context.py

@@ -159,7 +159,7 @@ class Value(Node):
 PRIMITIVES = (int, float, str, bytes, bool)
 
 
-class Container(Node, ABC):
+class Container(Node, ABC):  # noqa: B024
     meta: Meta
     data: Union[list, dict]
     _key_transform = staticmethod(identity)
@@ -172,7 +172,7 @@ class Container(Node, ABC):
         return self._convert_with_meta(value, meta)
 
     @staticmethod
-    def _convert_with_meta(value, meta: Meta = None):
+    def _convert_with_meta(value, meta: Optional[Meta] = None):
         if value is None or isinstance(value, PRIMITIVES):
             assert meta
             return Value(value, meta=meta)
@@ -228,7 +228,7 @@ class Container(Node, ABC):
 
         rem = rems[0]
         if not isinstance(d, Container):
-            raise ValueError(
+            raise ValueError(  # noqa: TRY004
                 f"{index} is a primitive value, cannot get '{rem}'"
             )
         return d.select(rem)
@@ -240,7 +240,7 @@ class Container(Node, ABC):
 class CtxList(Container, MutableSequence):
     _key_transform = staticmethod(int)
 
-    def __init__(self, values: Sequence, meta: Meta = None):
+    def __init__(self, values: Sequence, meta: Optional[Meta] = None):
         super().__init__(meta=meta)
         self.data: list = []
         self.extend(values)
@@ -263,7 +263,12 @@ class CtxList(Container, MutableSequence):
 
 
 class CtxDict(Container, MutableMapping):
-    def __init__(self, mapping: Mapping = None, meta: Meta = None, **kwargs):
+    def __init__(
+        self,
+        mapping: Optional[Mapping] = None,
+        meta: Optional[Meta] = None,
+        **kwargs,
+    ):
         super().__init__(meta=meta)
 
         self.data: dict = {}
@@ -301,7 +306,7 @@ class Context(CtxDict):
         """
         super().__init__(*args, **kwargs)
         self._track = False
-        self._tracked_data = defaultdict(dict)
+        self._tracked_data: Dict[str, Dict] = defaultdict(dict)
         self.imports = {}
         self._reserved_keys = {}
 
@@ -354,7 +359,7 @@ class Context(CtxDict):
 
     @classmethod
     def load_from(
-        cls, fs, path: str, select_keys: List[str] = None
+        cls, fs, path: str, select_keys: Optional[List[str]] = None
     ) -> "Context":
         from dvc.utils.serialize import load_path
 
@@ -414,27 +419,27 @@ class Context(CtxDict):
             self.imports[path].extend(cp)
 
     def check_loaded(self, path, item, keys):
-        if not keys and isinstance(self.imports[path], list):
+        imported = self.imports[path]
+        if not keys and isinstance(imported, list):
             raise VarsAlreadyLoaded(
                 f"cannot load '{item}' as it's partially loaded already"
             )
-        elif keys and self.imports[path] is None:
+        if keys and imported is None:
             raise VarsAlreadyLoaded(
                 f"cannot partially load '{item}' as it's already loaded."
             )
-        elif isinstance(self.imports[path], list):
-            if not set(keys).isdisjoint(set(self.imports[path])):
-                raise VarsAlreadyLoaded(
-                    f"cannot load '{item}' as it's partially loaded already"
-                )
+        if isinstance(imported, list) and set(keys) & set(imported):
+            raise VarsAlreadyLoaded(
+                f"cannot load '{item}' as it's partially loaded already"
+            )
 
     def load_from_vars(
         self,
         fs,
         vars_: List,
         wdir: str,
-        stage_name: str = None,
-        default: str = None,
+        stage_name: Optional[str] = None,
+        default: Optional[str] = None,
     ):
         if default:
             to_import = fs.path.join(wdir, default)
@@ -482,7 +487,7 @@ class Context(CtxDict):
         try:
             yield
         finally:
-            for key in new.keys():
+            for key in new:
                 self._reserved_keys.pop(key)
 
     @contextmanager

dvc/parsing/interpolate.py

@@ -1,3 +1,4 @@
+import os
 import re
 import typing
 from collections.abc import Iterable, Mapping
@@ -9,10 +10,9 @@ from dvc.exceptions import DvcException
 from dvc.utils.flatten import flatten
 
 if typing.TYPE_CHECKING:
-    from typing import List, Match
+    from typing import List, Match, NoReturn
 
     from pyparsing import ParseException
-    from typing_extensions import NoReturn
 
     from .context import Context
 
@@ -71,6 +71,16 @@ def embrace(s: str):
     return BRACE_OPEN + s + BRACE_CLOSE
 
 
+def escape_str(value):
+    if os.name == "nt":
+        from subprocess import list2cmdline
+
+        return list2cmdline([value])
+    from shlex import quote
+
+    return quote(value)
+
+
 @singledispatch
 def to_str(obj) -> str:
     return str(obj)
@@ -82,7 +92,7 @@ def _(obj: bool):
 
 
 @to_str.register(dict)
-def _(obj: dict):
+def _(obj: dict):  # noqa: C901
     from dvc.config import Config
 
     config = Config().get("parsing", {})
@@ -98,12 +108,12 @@ def _(obj: dict):
                     result += f"--no-{k} "
 
         elif isinstance(v, str):
-            result += f"--{k} '{v}' "
+            result += f"--{k} {escape_str(v)} "
 
         elif isinstance(v, Iterable):
             for n, i in enumerate(v):
                 if isinstance(i, str):
-                    i = f"'{i}'"
+                    i = escape_str(i)
                 elif isinstance(i, Iterable):
                     raise ParseError(
                         f"Cannot interpolate nested iterable in '{k}'"
@@ -176,7 +186,7 @@ def parse_expr(s: str):
         result = get_parser().parseString(s, parseAll=True)
     except ParseException as exc:
         format_and_raise_parse_error(exc)
-        raise AssertionError("unreachable")
+        raise AssertionError("unreachable")  # noqa: B904
 
     joined = result.asList()
     assert len(joined) == 1
@@ -194,9 +204,8 @@ def validate_value(value, key):
     not_primitive = value is not None and not isinstance(value, PRIMITIVES)
     not_foreach = key is not None and "foreach" not in key
     if not_primitive and not_foreach:
-        if isinstance(value, dict):
-            if key == "cmd":
-                return True
+        if isinstance(value, dict) and key == "cmd":
+            return True
         raise ParseError(
             f"Cannot interpolate data of type '{type(value).__name__}'"
         )

dvc/pathspec_math.py

@@ -50,8 +50,7 @@ def change_rule(rule, rel):
         rule = f"!/{rel}{rule}"
     else:
         rule = f"/{rel}{rule}"
-    rule = normalize_file(rule)
-    return rule
+    return normalize_file(rule)
 
 
 def _change_dirname(dirname, pattern_list, new_dirname):