cli: remove fix_subparsers (#10229)

It does not look like we need this.

dvc/cli/parser.py

@@ -203,12 +203,9 @@ def get_main_parser():
         metavar="command",
         dest="cmd",
         help="Use `dvc command --help` for command-specific help.",
+        required=True,
     )
 
-    from .utils import fix_subparsers
-
-    fix_subparsers(subparsers)
-
     for cmd in COMMANDS:
         cmd.add_parser(subparsers, parent_parser)
 

dvc/cli/utils.py

@@ -26,18 +26,6 @@ class DictAction(argparse.Action):
         setattr(args, self.dest, d)
 
 
-def fix_subparsers(subparsers):
-    """Workaround for bug in Python 3. See more info at:
-    https://bugs.python.org/issue16308
-    https://github.com/iterative/dvc/issues/769
-
-    Args:
-        subparsers: subparsers to fix.
-    """
-    subparsers.required = True
-    subparsers.dest = "cmd"
-
-
 def append_doc_link(help_message, path):
     from dvc.utils import format_link
 

dvc/commands/artifacts.py

@@ -1,6 +1,6 @@
 from dvc.cli import completion, formatter
 from dvc.cli.command import CmdBaseNoRepo
-from dvc.cli.utils import DictAction, append_doc_link, fix_subparsers
+from dvc.cli.utils import DictAction, append_doc_link
 from dvc.exceptions import DvcException
 from dvc.log import logger
 
@@ -50,8 +50,8 @@ def add_parser(subparsers, parent_parser):
     artifacts_subparsers = artifacts_parser.add_subparsers(
         dest="cmd",
         help="Use `dvc artifacts CMD --help` to display command-specific help.",
+        required=True,
     )
-    fix_subparsers(artifacts_subparsers)
 
     ARTIFACTS_GET_HELP = "Download an artifact from a DVC project."
     get_parser = artifacts_subparsers.add_parser(

dvc/commands/cache.py

@@ -3,7 +3,7 @@ import os
 
 from dvc.cli import completion, formatter
 from dvc.cli.command import CmdBase
-from dvc.cli.utils import append_doc_link, fix_subparsers
+from dvc.cli.utils import append_doc_link
 from dvc.commands.config import CmdConfig
 from dvc.ui import ui
 
@@ -64,6 +64,7 @@ def add_parser(subparsers, parent_parser):
     cache_subparsers = cache_parser.add_subparsers(
         dest="cmd",
         help="Use `dvc cache CMD --help` for command-specific help.",
+        required=True,
     )
 
     parent_cache_config_parser = argparse.ArgumentParser(
@@ -122,5 +123,3 @@ def add_parser(subparsers, parent_parser):
         action="store_true",
     )
     cache_migrate_parser.set_defaults(func=CmdCacheMigrate)
-
-    fix_subparsers(cache_subparsers)

dvc/commands/daemon.py

@@ -1,6 +1,5 @@
 from dvc.cli import completion
 from dvc.cli.command import CmdBaseNoRepo
-from dvc.cli.utils import fix_subparsers
 from dvc.log import logger
 
 logger = logger.getChild(__name__)
@@ -53,10 +52,9 @@ def add_parser(subparsers, parent_parser):
     daemon_subparsers = daemon_parser.add_subparsers(
         dest="cmd",
         help="Use `dvc daemon CMD --help` for command-specific help.",
+        required=True,
     )
 
-    fix_subparsers(daemon_subparsers)
-
     DAEMON_UPDATER_HELP = "Fetch latest available version."
     daemon_updater_parser = daemon_subparsers.add_parser(
         "updater",

dvc/commands/data.py

@@ -4,7 +4,7 @@ from funcy import chunks, compact, log_durations
 
 from dvc.cli import formatter
 from dvc.cli.command import CmdBase
-from dvc.cli.utils import append_doc_link, fix_subparsers
+from dvc.cli.utils import append_doc_link
 from dvc.log import logger
 from dvc.ui import ui
 from dvc.utils import colorize
@@ -134,8 +134,8 @@ def add_parser(subparsers, parent_parser):
     data_subparsers = data_parser.add_subparsers(
         dest="cmd",
         help="Use `dvc data CMD --help` to display command-specific help.",
+        required=True,
     )
-    fix_subparsers(data_subparsers)
 
     DATA_STATUS_HELP = (
         "Show changes between the last git commit, the dvcfiles and the workspace."

dvc/commands/experiments/__init__.py

@@ -1,5 +1,5 @@
 from dvc.cli import formatter
-from dvc.cli.utils import append_doc_link, fix_subparsers, hide_subparsers_from_help
+from dvc.cli.utils import append_doc_link, hide_subparsers_from_help
 from dvc.commands.experiments import (
     apply,
     branch,
@@ -50,9 +50,9 @@ def add_parser(subparsers, parent_parser):
     experiments_subparsers = experiments_parser.add_subparsers(
         dest="cmd",
         help="Use `dvc experiments CMD --help` to display command-specific help.",
+        required=True,
     )
 
-    fix_subparsers(experiments_subparsers)
     for cmd in SUB_COMMANDS:
         cmd.add_parser(experiments_subparsers, parent_parser)
     hide_subparsers_from_help(experiments_subparsers)

dvc/commands/git_hook.py

@@ -2,7 +2,6 @@ import os
 
 from dvc.cli import formatter
 from dvc.cli.command import CmdBaseNoRepo
-from dvc.cli.utils import fix_subparsers
 from dvc.exceptions import NotDvcRepoError
 from dvc.log import logger
 
@@ -95,10 +94,9 @@ def add_parser(subparsers, parent_parser):
     git_hook_subparsers = git_hook_parser.add_subparsers(
         dest="cmd",
         help="Use `dvc daemon CMD --help` for command-specific help.",
+        required=True,
     )
 
-    fix_subparsers(git_hook_subparsers)
-
     PRE_COMMIT_HELP = "Run pre-commit GIT hook."
     pre_commit_parser = git_hook_subparsers.add_parser(
         "pre-commit",

dvc/commands/metrics.py

@@ -1,6 +1,6 @@
 from dvc.cli import completion, formatter
 from dvc.cli.command import CmdBase
-from dvc.cli.utils import append_doc_link, fix_subparsers
+from dvc.cli.utils import append_doc_link
 from dvc.log import logger
 from dvc.ui import ui
 from dvc.utils.serialize import encode_exception
@@ -111,10 +111,9 @@ def add_parser(subparsers, parent_parser):
     metrics_subparsers = metrics_parser.add_subparsers(
         dest="cmd",
         help="Use `dvc metrics CMD --help` to display command-specific help.",
+        required=True,
     )
 
-    fix_subparsers(metrics_subparsers)
-
     METRICS_SHOW_HELP = "Print metrics, with optional formatting."
     metrics_show_parser = metrics_subparsers.add_parser(
         "show",

dvc/commands/params.py

@@ -1,6 +1,6 @@
 from dvc.cli import completion, formatter
 from dvc.cli.command import CmdBase
-from dvc.cli.utils import append_doc_link, fix_subparsers
+from dvc.cli.utils import append_doc_link
 from dvc.log import logger
 from dvc.ui import ui
 
@@ -65,10 +65,9 @@ def add_parser(subparsers, parent_parser):
     params_subparsers = params_parser.add_subparsers(
         dest="cmd",
         help="Use `dvc params CMD --help` to display command-specific help.",
+        required=True,
     )
 
-    fix_subparsers(params_subparsers)
-
     PARAMS_DIFF_HELP = (
         "Show changes in params between commits in the DVC repository, or "
         "between a commit and the workspace."

dvc/commands/plots.py

@@ -6,7 +6,7 @@ from funcy import compact, first, get_in
 
 from dvc.cli import completion, formatter
 from dvc.cli.command import CmdBase
-from dvc.cli.utils import append_doc_link, fix_subparsers
+from dvc.cli.utils import append_doc_link
 from dvc.exceptions import DvcException
 from dvc.log import logger
 from dvc.ui import ui
@@ -228,10 +228,9 @@ def add_parser(subparsers, parent_parser):
     plots_subparsers = plots_parser.add_subparsers(
         dest="cmd",
         help="Use `dvc plots CMD --help` to display command-specific help.",
+        required=True,
     )
 
-    fix_subparsers(plots_subparsers)
-
     SHOW_HELP = (
         "Generate plots from target files or from `plots` definitions in `dvc.yaml`."
     )

dvc/commands/queue/__init__.py

@@ -1,5 +1,5 @@
 from dvc.cli import formatter
-from dvc.cli.utils import append_doc_link, fix_subparsers
+from dvc.cli.utils import append_doc_link
 from dvc.commands.queue import kill, logs, remove, start, status, stop
 
 SUB_COMMANDS = [
@@ -26,8 +26,8 @@ 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.",
+        required=True,
     )
 
-    fix_subparsers(queue_subparsers)
     for cmd in SUB_COMMANDS:
         cmd.add_parser(queue_subparsers, parent_parser)

dvc/commands/remote.py

@@ -1,5 +1,5 @@
 from dvc.cli import formatter
-from dvc.cli.utils import append_doc_link, fix_subparsers
+from dvc.cli.utils import append_doc_link
 from dvc.commands.config import CmdConfig
 from dvc.ui import ui
 from dvc.utils import format_link
@@ -160,10 +160,9 @@ def add_parser(subparsers, parent_parser):
     remote_subparsers = remote_parser.add_subparsers(
         dest="cmd",
         help="Use `dvc remote CMD --help` for command-specific help.",
+        required=True,
     )
 
-    fix_subparsers(remote_subparsers)
-
     REMOTE_ADD_HELP = "Add a new data remote."
     remote_add_parser = remote_subparsers.add_parser(
         "add",

dvc/commands/stage.py

@@ -6,7 +6,7 @@ from typing import TYPE_CHECKING, Dict, Iterable, List
 
 from dvc.cli import completion, formatter
 from dvc.cli.command import CmdBase
-from dvc.cli.utils import append_doc_link, fix_subparsers
+from dvc.cli.utils import append_doc_link
 from dvc.log import logger
 from dvc.utils.cli_parse import parse_params
 from dvc.utils.humanize import truncate_text
@@ -290,10 +290,9 @@ def add_parser(subparsers, parent_parser):
     stage_subparsers = stage_parser.add_subparsers(
         dest="cmd",
         help="Use `dvc stage CMD --help` to display command-specific help.",
+        required=True,
     )
 
-    fix_subparsers(stage_subparsers)
-
     STAGE_ADD_HELP = "Create stage"
     stage_add_parser = stage_subparsers.add_parser(
         "add",

dvc/commands/studio.py

@@ -3,7 +3,7 @@ import os
 from funcy import get_in
 
 from dvc.cli import formatter
-from dvc.cli.utils import append_doc_link, fix_subparsers
+from dvc.cli.utils import append_doc_link
 from dvc.commands.config import CmdConfig
 from dvc.log import logger
 
@@ -97,8 +97,8 @@ def add_parser(subparsers, parent_parser):
     studio_subparser = studio_parser.add_subparsers(
         dest="cmd",
         help="Use `DVC studio CMD --help` to display command-specific help.",
+        required=True,
     )
-    fix_subparsers(studio_subparser)
 
     STUDIO_LOGIN_HELP = "Authenticate DVC with Studio host"
     STUDIO_LOGIN_DESCRIPTION = (