prompt: We are currently solving the following issue within our repository. Here is the issue text:
  --- BEGIN ISSUE ---
  Add docs for new pip debug command
  This is a follow-up issue to PR #6638 to add docs for the new `pip debug` command. As @xavfernandez said in [this comment](https://github.com/pypa/pip/pull/6638#pullrequestreview-256090004):
  
  > It would also need basic documentation (at least a `docs/html/reference/pip_debug.rst`) and most importantly (IMHO), strongly emphasize that the output and the options of this command are provisional and might change without notice.
  
  
  
  
  --- END ISSUE ---
  
  Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
  --- BEGIN FILES ---
  Path: `src/pip/_internal/commands/debug.py`
  Content:
  ```
  1 from __future__ import absolute_import
  2 
  3 import logging
  4 import sys
  5 
  6 from pip._internal.cli import cmdoptions
  7 from pip._internal.cli.base_command import Command
  8 from pip._internal.cli.cmdoptions import make_target_python
  9 from pip._internal.cli.status_codes import SUCCESS
  10 from pip._internal.utils.logging import indent_log
  11 from pip._internal.utils.misc import get_pip_version
  12 from pip._internal.utils.typing import MYPY_CHECK_RUNNING
  13 from pip._internal.wheel import format_tag
  14 
  15 if MYPY_CHECK_RUNNING:
  16     from typing import Any, List
  17     from optparse import Values
  18 
  19 logger = logging.getLogger(__name__)
  20 
  21 
  22 def show_value(name, value):
  23     # type: (str, str) -> None
  24     logger.info('{}: {}'.format(name, value))
  25 
  26 
  27 def show_sys_implementation():
  28     # type: () -> None
  29     logger.info('sys.implementation:')
  30     if hasattr(sys, 'implementation'):
  31         implementation = sys.implementation  # type: ignore
  32         implementation_name = implementation.name
  33     else:
  34         implementation_name = ''
  35 
  36     with indent_log():
  37         show_value('name', implementation_name)
  38 
  39 
  40 def show_tags(options):
  41     # type: (Values) -> None
  42     tag_limit = 10
  43 
  44     target_python = make_target_python(options)
  45     tags = target_python.get_tags()
  46 
  47     # Display the target options that were explicitly provided.
  48     formatted_target = target_python.format_given()
  49     suffix = ''
  50     if formatted_target:
  51         suffix = ' (target: {})'.format(formatted_target)
  52 
  53     msg = 'Compatible tags: {}{}'.format(len(tags), suffix)
  54     logger.info(msg)
  55 
  56     if options.verbose < 1 and len(tags) > tag_limit:
  57         tags_limited = True
  58         tags = tags[:tag_limit]
  59     else:
  60         tags_limited = False
  61 
  62     with indent_log():
  63         for tag in tags:
  64             logger.info(format_tag(tag))
  65 
  66         if tags_limited:
  67             msg = (
  68                 '...\n'
  69                 '[First {tag_limit} tags shown. Pass --verbose to show all.]'
  70             ).format(tag_limit=tag_limit)
  71             logger.info(msg)
  72 
  73 
  74 class DebugCommand(Command):
  75     """
  76     Display debug information.
  77     """
  78 
  79     name = 'debug'
  80     usage = """
  81       %prog <options>"""
  82     summary = 'Show information useful for debugging.'
  83     ignore_require_venv = True
  84 
  85     def __init__(self, *args, **kw):
  86         super(DebugCommand, self).__init__(*args, **kw)
  87 
  88         cmd_opts = self.cmd_opts
  89         cmdoptions.add_target_python_options(cmd_opts)
  90         self.parser.insert_option_group(0, cmd_opts)
  91 
  92     def run(self, options, args):
  93         # type: (Values, List[Any]) -> int
  94         show_value('pip version', get_pip_version())
  95         show_value('sys.version', sys.version)
  96         show_value('sys.executable', sys.executable)
  97         show_value('sys.platform', sys.platform)
  98         show_sys_implementation()
  99 
  100         show_tags(options)
  101 
  102         return SUCCESS
  103
  ```
  --- END FILES ---
  
  Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.
  
  Here is an example:
  
  ```diff
  diff --git a/examples/server_async.py b/examples/server_async.py
  --- a/examples/server_async.py
  +++ b/examples/server_async.py
  @@ -313,4 +313,4 @@
   
   
   if __name__ == "__main__":
  -    asyncio.run(run_async_server("."), debug=True)
  +    asyncio.run(run_async_server(), debug=True)
  diff --git a/examples/server_sync.py b/examples/server_sync.py
  --- a/examples/server_sync.py
  +++ b/examples/server_sync.py
  @@ -313,5 +313,5 @@
   
   
   if __name__ == "__main__":
  -    server = run_sync_server(".")
  +    server = run_sync_server()
       server.shutdown()
  
  ```
  
golden_diff: diff --git a/src/pip/_internal/commands/debug.py b/src/pip/_internal/commands/debug.py
  --- a/src/pip/_internal/commands/debug.py
  +++ b/src/pip/_internal/commands/debug.py
  @@ -91,6 +91,12 @@
   
       def run(self, options, args):
           # type: (Values, List[Any]) -> int
  +        logger.warning(
  +            "This command is only meant for debugging. "
  +            "Do not use this with automation for parsing and getting these "
  +            "details, since the output and options of this command may "
  +            "change without notice."
  +        )
           show_value('pip version', get_pip_version())
           show_value('sys.version', sys.version)
           show_value('sys.executable', sys.executable)
  
verification_info: {"golden_diff": "diff --git a/src/pip/_internal/commands/debug.py b/src/pip/_internal/commands/debug.py\n--- a/src/pip/_internal/commands/debug.py\n+++ b/src/pip/_internal/commands/debug.py\n@@ -91,6 +91,12 @@\n \n     def run(self, options, args):\n         # type: (Values, List[Any]) -> int\n+        logger.warning(\n+            \"This command is only meant for debugging. \"\n+            \"Do not use this with automation for parsing and getting these \"\n+            \"details, since the output and options of this command may \"\n+            \"change without notice.\"\n+        )\n         show_value('pip version', get_pip_version())\n         show_value('sys.version', sys.version)\n         show_value('sys.executable', sys.executable)\n", "issue": "Add docs for new pip debug command\nThis is a follow-up issue to PR #6638 to add docs for the new `pip debug` command. As @xavfernandez said in [this comment](https://github.com/pypa/pip/pull/6638#pullrequestreview-256090004):\r\n\r\n> It would also need basic documentation (at least a `docs/html/reference/pip_debug.rst`) and most importantly (IMHO), strongly emphasize that the output and the options of this command are provisional and might change without notice.\r\n\r\n\r\n\n", "before_files": [{"content": "from __future__ import absolute_import\n\nimport logging\nimport sys\n\nfrom pip._internal.cli import cmdoptions\nfrom pip._internal.cli.base_command import Command\nfrom pip._internal.cli.cmdoptions import make_target_python\nfrom pip._internal.cli.status_codes import SUCCESS\nfrom pip._internal.utils.logging import indent_log\nfrom pip._internal.utils.misc import get_pip_version\nfrom pip._internal.utils.typing import MYPY_CHECK_RUNNING\nfrom pip._internal.wheel import format_tag\n\nif MYPY_CHECK_RUNNING:\n    from typing import Any, List\n    from optparse import Values\n\nlogger = logging.getLogger(__name__)\n\n\ndef show_value(name, value):\n    # type: (str, str) -> None\n    logger.info('{}: {}'.format(name, value))\n\n\ndef show_sys_implementation():\n    # type: () -> None\n    logger.info('sys.implementation:')\n    if hasattr(sys, 'implementation'):\n        implementation = sys.implementation  # type: ignore\n        implementation_name = implementation.name\n    else:\n        implementation_name = ''\n\n    with indent_log():\n        show_value('name', implementation_name)\n\n\ndef show_tags(options):\n    # type: (Values) -> None\n    tag_limit = 10\n\n    target_python = make_target_python(options)\n    tags = target_python.get_tags()\n\n    # Display the target options that were explicitly provided.\n    formatted_target = target_python.format_given()\n    suffix = ''\n    if formatted_target:\n        suffix = ' (target: {})'.format(formatted_target)\n\n    msg = 'Compatible tags: {}{}'.format(len(tags), suffix)\n    logger.info(msg)\n\n    if options.verbose < 1 and len(tags) > tag_limit:\n        tags_limited = True\n        tags = tags[:tag_limit]\n    else:\n        tags_limited = False\n\n    with indent_log():\n        for tag in tags:\n            logger.info(format_tag(tag))\n\n        if tags_limited:\n            msg = (\n                '...\\n'\n                '[First {tag_limit} tags shown. Pass --verbose to show all.]'\n            ).format(tag_limit=tag_limit)\n            logger.info(msg)\n\n\nclass DebugCommand(Command):\n    \"\"\"\n    Display debug information.\n    \"\"\"\n\n    name = 'debug'\n    usage = \"\"\"\n      %prog <options>\"\"\"\n    summary = 'Show information useful for debugging.'\n    ignore_require_venv = True\n\n    def __init__(self, *args, **kw):\n        super(DebugCommand, self).__init__(*args, **kw)\n\n        cmd_opts = self.cmd_opts\n        cmdoptions.add_target_python_options(cmd_opts)\n        self.parser.insert_option_group(0, cmd_opts)\n\n    def run(self, options, args):\n        # type: (Values, List[Any]) -> int\n        show_value('pip version', get_pip_version())\n        show_value('sys.version', sys.version)\n        show_value('sys.executable', sys.executable)\n        show_value('sys.platform', sys.platform)\n        show_sys_implementation()\n\n        show_tags(options)\n\n        return SUCCESS\n", "path": "src/pip/_internal/commands/debug.py"}], "after_files": [{"content": "from __future__ import absolute_import\n\nimport logging\nimport sys\n\nfrom pip._internal.cli import cmdoptions\nfrom pip._internal.cli.base_command import Command\nfrom pip._internal.cli.cmdoptions import make_target_python\nfrom pip._internal.cli.status_codes import SUCCESS\nfrom pip._internal.utils.logging import indent_log\nfrom pip._internal.utils.misc import get_pip_version\nfrom pip._internal.utils.typing import MYPY_CHECK_RUNNING\nfrom pip._internal.wheel import format_tag\n\nif MYPY_CHECK_RUNNING:\n    from typing import Any, List\n    from optparse import Values\n\nlogger = logging.getLogger(__name__)\n\n\ndef show_value(name, value):\n    # type: (str, str) -> None\n    logger.info('{}: {}'.format(name, value))\n\n\ndef show_sys_implementation():\n    # type: () -> None\n    logger.info('sys.implementation:')\n    if hasattr(sys, 'implementation'):\n        implementation = sys.implementation  # type: ignore\n        implementation_name = implementation.name\n    else:\n        implementation_name = ''\n\n    with indent_log():\n        show_value('name', implementation_name)\n\n\ndef show_tags(options):\n    # type: (Values) -> None\n    tag_limit = 10\n\n    target_python = make_target_python(options)\n    tags = target_python.get_tags()\n\n    # Display the target options that were explicitly provided.\n    formatted_target = target_python.format_given()\n    suffix = ''\n    if formatted_target:\n        suffix = ' (target: {})'.format(formatted_target)\n\n    msg = 'Compatible tags: {}{}'.format(len(tags), suffix)\n    logger.info(msg)\n\n    if options.verbose < 1 and len(tags) > tag_limit:\n        tags_limited = True\n        tags = tags[:tag_limit]\n    else:\n        tags_limited = False\n\n    with indent_log():\n        for tag in tags:\n            logger.info(format_tag(tag))\n\n        if tags_limited:\n            msg = (\n                '...\\n'\n                '[First {tag_limit} tags shown. Pass --verbose to show all.]'\n            ).format(tag_limit=tag_limit)\n            logger.info(msg)\n\n\nclass DebugCommand(Command):\n    \"\"\"\n    Display debug information.\n    \"\"\"\n\n    name = 'debug'\n    usage = \"\"\"\n      %prog <options>\"\"\"\n    summary = 'Show information useful for debugging.'\n    ignore_require_venv = True\n\n    def __init__(self, *args, **kw):\n        super(DebugCommand, self).__init__(*args, **kw)\n\n        cmd_opts = self.cmd_opts\n        cmdoptions.add_target_python_options(cmd_opts)\n        self.parser.insert_option_group(0, cmd_opts)\n\n    def run(self, options, args):\n        # type: (Values, List[Any]) -> int\n        logger.warning(\n            \"This command is only meant for debugging. \"\n            \"Do not use this with automation for parsing and getting these \"\n            \"details, since the output and options of this command may \"\n            \"change without notice.\"\n        )\n        show_value('pip version', get_pip_version())\n        show_value('sys.version', sys.version)\n        show_value('sys.executable', sys.executable)\n        show_value('sys.platform', sys.platform)\n        show_sys_implementation()\n\n        show_tags(options)\n\n        return SUCCESS\n", "path": "src/pip/_internal/commands/debug.py"}]}