internlm/SWE-Fixer-Train-110K huggingface dataset:
Repository: pallets/click

Issue:
no_args_is_help for Command: documentation vs code is wrong
I am using Python 3.7 and have Click 7.0 installed via `pip install click`.

In the current [API documentation](https://click.palletsprojects.com/en/7.x/api/) the documentation for the `command` decorator says the following:

> Creates a new `Command` and uses the decorated function as callback. This will also automatically attach all decorated `option()`s and `argument()`s as parameters to the command.
> ...
> **All keyword arguments are forwarded to the underlying command class.**

This is my first time using click, so when I click on the link to get the `Command` class documentation, it tells me it has this option:

> `no_args_is_help` – this controls what happens if no arguments are provided. This option is disabled by default. If enabled this will add --help as argument if no arguments are passed

However when I try to add this as an option to the `command` decorator I get an error:

> `TypeError: __init__() got an unexpected keyword argument 'no_args_is_help'`

Looking into the code in `decorators` and `core` it is apparent that this error is because `Command` doesn't actually have the `no_args_is_help` argument, only `MultiCommand` does.

Why is there such a big discrepancy between the documentation and the actual implementation? I see that there are other issues here about this same option, but they are all either merged or closed as far as I can tell. As a new user this is extremely frustrating because I'm trying to 'rtfm' but that doesn't work when the manual is wrong.


Discussion:
From [the changelog](https://click.palletsprojects.com/en/7.x/changelog/#version-7-1) for 7.1:
> Add no_args_is_help option to click.Command, defaults to False (#1167)

It looks like the docs may have been built from unreleased changes intended for 7.1.

This is why PRs need to have `.. versionadded` or `.. versionchanged` markers in the docs as well as a changelog entry.
@ericnchen Thanks for pointing this out, I'm sure if there are other spots where the docs differ from the code (unlikely in my experience), the maintainers would be glad to hear about it.

@davidism I can put together a PR to fix this, I'll put 7.1 as `.. versionadded`. Would it also be worth expanding the contribution guidelines to detail some of these best practices?

Resolving patch:
diff --git a/click/core.py b/click/core.py
--- a/click/core.py
+++ b/click/core.py
@@ -776,6 +776,8 @@ class Command(BaseCommand):
 
     .. versionchanged:: 2.0
        Added the `context_settings` parameter.
+    .. versionchanged:: 7.1
+       Added the `no_args_is_help` parameter.
 
     :param name: the name of the command to use unless a group overrides it.
     :param context_settings: an optional dictionary with defaults that are


Test patch:
Repository: pallets/click

Issue:
Choices.get_metavar makes all choices look optional
Creating a required parameter with a `Choice` type leads to confusing helpstrings.

From https://en.wikipedia.org/wiki/Command-line_interface#Command_description_syntax 

> Built-in usage help and man pages commonly employ a small syntax to describe the valid command form:
> * angle brackets for required parameters: `ping <hostname>`
> * square brackets for optional parameters: `mkdir [-p] <dirname>`
> * ellipses for repeated items: `cp <source1> [source2...] <dest>`
> * vertical bars for choice of items: `netstat {-t|-u}`


Discussion:

Resolving patch:
diff --git a/src/click/types.py b/src/click/types.py
--- a/src/click/types.py
+++ b/src/click/types.py
@@ -157,7 +157,14 @@ def __init__(self, choices, case_sensitive=True):
         self.case_sensitive = case_sensitive
 
     def get_metavar(self, param):
-        return f"[{'|'.join(self.choices)}]"
+        choices_str = "|".join(self.choices)
+
+        # Use curly braces to indicate a required argument.
+        if param.required and param.param_type_name == "argument":
+            return f"{{{choices_str}}}"
+
+        # Use square braces to indicate an option or optional argument.
+        return f"[{choices_str}]"
 
     def get_missing_message(self, param):
         choice_str = ",\n\t".join(self.choices)


Test patch:
diff --git a/tests/test_basic.py b/tests/test_basic.py
--- a/tests/test_basic.py
+++ b/tests/test_basic.py
@@ -352,6 +352,27 @@ def cli(method):
     assert "--method [foo|bar|baz]" in result.output
 
 
+def test_choice_argument(runner):
+    @click.command()
+    @click.argument("method", type=click.Choice(["foo", "bar", "baz"]))
+    def cli(method):
+        click.echo(method)
+
+    result = runner.invoke(cli, ["foo"])
+    assert not result.exception
+    assert result.output == "foo\n"
+
+    result = runner.invoke(cli, ["meh"])
+    assert result.exit_code == 2
+    assert (
+        "Invalid value for '{foo|bar|baz}': invalid choice: meh. "
+        "(choose from foo, bar, baz)" in result.output
+    )
+
+    result = runner.invoke(cli, ["--help"])
+    assert "{foo|bar|baz}" in result.output
+
+
 def test_datetime_option_default(runner):
     @click.command()
     @click.option("--start_date", type=click.DateTime())
Repository: pallets/click

Issue:
Friendly __repr__ for Command
```python
(Pdb) pp cmd
<click.core.Command object at 0x7ff869ef1550>
(Pdb) pp cmd.name
'run-gunicorn'
```
What do you think of showing the command name in the `__repr__` string, for friendlier debugging? Could be a good beginner-friendly issue!


Discussion:
I'm going to take a stab at this

Resolving patch:
diff --git a/click/core.py b/click/core.py
--- a/click/core.py
+++ b/click/core.py
@@ -771,6 +771,8 @@ class Command(BaseCommand):
 
     .. versionchanged:: 2.0
        Added the `context_settings` parameter.
+    .. versionchanged:: 8.0
+       Added repr showing the command name
 
     :param name: the name of the command to use unless a group overrides it.
     :param context_settings: an optional dictionary with defaults that are
@@ -815,6 +817,9 @@ def __init__(self, name, context_settings=None, callback=None,
         self.hidden = hidden
         self.deprecated = deprecated
 
+    def __repr__(self):
+        return '<%s %s>' % (self.__class__.__name__, self.name)
+
     def get_usage(self, ctx):
         formatter = ctx.make_formatter()
         self.format_usage(ctx, formatter)


Test patch:
diff --git a/tests/test_basic.py b/tests/test_basic.py
--- a/tests/test_basic.py
+++ b/tests/test_basic.py
@@ -23,6 +23,24 @@ def cli():
     assert result.exit_code == 0
 
 
+def test_repr():
+    @click.command()
+    def command():
+        pass
+
+    @click.group()
+    def group():
+        pass
+
+    @group.command()
+    def subcommand():
+        pass
+
+    assert repr(command) == '<Command command>'
+    assert repr(group) == '<Group group>'
+    assert repr(subcommand) == '<Command subcommand>'
+
+
 def test_return_values():
     @click.command()
     def cli():
Repository: pallets/click

Issue:
option with bool type
``` py
@click.command()
@click.option('--shout/--no-shout', default=False)
def info(shout):
    pass

info()
```

is ok, but

``` py
@click.command()
@click.option('--shout/--no-shout', default=False, type=bool)
def info(shout):
    pass

info()
```

will raise a TypeError: Got secondary option for non boolean flag.


Discussion:
I've tracked this down to
https://github.com/pallets/click/blob/c6042bf2607c5be22b1efef2e42a94ffd281434c/click/core.py#L1573
in this case `type` is not `None`, it's `bool`, so the condition is failing and `self.is_bool_flag` incorrectly gets set to `False`.

I can't immediately see why this is there (it just looks wrong at first glance). But [blame](https://github.com/pallets/click/blame/master/click/core.py#L1573) says that line of code is 5 years old, which suggests there's more to it...
I am working on a click helper library (https://github.com/Cologler/click-anno-python), so I was did a lot of tests for click.
I think this is there because the `--no-` option makes this a special type of boolean flag automatically, it wouldn't make sense to assign a type to it. I guess we could check if type is none or bool.
Huh, I’d have thought using the `/--no-` spelling should *imply* `type=bool`, so you wouldn’t have to add that explicitly, but if you did, it would mean the same thing. 
Taking a look at this
Checked the Discord, it looks like KP has got it

Resolving patch:
diff --git a/click/core.py b/click/core.py
--- a/click/core.py
+++ b/click/core.py
@@ -1606,7 +1606,7 @@ def __init__(self, param_decls=None, show_default=False,
         self.is_flag = is_flag
         self.flag_value = flag_value
         if self.is_flag and isinstance(self.flag_value, bool) \
-           and type is None:
+           and type in [None, bool]:
             self.type = BOOL
             self.is_bool_flag = True
         else:
@@ -1770,7 +1770,7 @@ def _write_opts(opts):
         return ((any_prefix_is_slash and '; ' or ' / ').join(rv), help)
 
     def get_default(self, ctx):
-        # If we're a non boolean flag out default is more complex because
+        # If we're a non boolean flag our default is more complex because
         # we need to look at all flags in the same group to figure out
         # if we're the the default one in which case we return the flag
         # value as default.


Test patch:
diff --git a/tests/test_options.py b/tests/test_options.py
--- a/tests/test_options.py
+++ b/tests/test_options.py
@@ -463,6 +463,16 @@ def cmd2(testoption):
         assert 'you wont see me' not in result.output
 
 
+def test_bool_flag_with_type(runner):
+    @click.command()
+    @click.option('--shout/--no-shout', default=False, type=bool)
+    def cmd(shout):
+        pass
+
+    result = runner.invoke(cmd)
+    assert not result.exception
+
+
 def test_aliases_for_flags(runner):
     @click.command()
     @click.option('--warnings/--no-warnings', ' /-W', default=True)
Repository: pallets/click

Issue:
complex example - misleading name for context
The name `Context` and `pass_context` are misleading in the complex example, since the `Context` defined in the example shares a name with the click `Context`. Maybe a different name such as "Environment" or "Options" would be more appropriate.


Discussion:

Resolving patch:
diff --git a/examples/complex/complex/cli.py b/examples/complex/complex/cli.py
--- a/examples/complex/complex/cli.py
+++ b/examples/complex/complex/cli.py
@@ -6,7 +6,7 @@
 CONTEXT_SETTINGS = dict(auto_envvar_prefix='COMPLEX')
 
 
-class Context(object):
+class Environment(object):
 
     def __init__(self):
         self.verbose = False
@@ -24,7 +24,7 @@ def vlog(self, msg, *args):
             self.log(msg, *args)
 
 
-pass_context = click.make_pass_decorator(Context, ensure=True)
+pass_environment = click.make_pass_decorator(Environment, ensure=True)
 cmd_folder = os.path.abspath(os.path.join(os.path.dirname(__file__),
                                           'commands'))
 
@@ -57,7 +57,7 @@ def get_command(self, ctx, name):
               help='Changes the folder to operate on.')
 @click.option('-v', '--verbose', is_flag=True,
               help='Enables verbose mode.')
-@pass_context
+@pass_environment
 def cli(ctx, verbose, home):
     """A complex command line interface."""
     ctx.verbose = verbose
diff --git a/examples/complex/complex/commands/cmd_init.py b/examples/complex/complex/commands/cmd_init.py
--- a/examples/complex/complex/commands/cmd_init.py
+++ b/examples/complex/complex/commands/cmd_init.py
@@ -1,10 +1,10 @@
 import click
-from complex.cli import pass_context
+from complex.cli import pass_environment
 
 
 @click.command('init', short_help='Initializes a repo.')
 @click.argument('path', required=False, type=click.Path(resolve_path=True))
-@pass_context
+@pass_environment
 def cli(ctx, path):
     """Initializes a repository."""
     if path is None:
diff --git a/examples/complex/complex/commands/cmd_status.py b/examples/complex/complex/commands/cmd_status.py
--- a/examples/complex/complex/commands/cmd_status.py
+++ b/examples/complex/complex/commands/cmd_status.py
@@ -1,9 +1,9 @@
 import click
-from complex.cli import pass_context
+from complex.cli import pass_environment
 
 
 @click.command('status', short_help='Shows file changes.')
-@pass_context
+@pass_environment
 def cli(ctx):
     """Shows file changes in the current working directory."""
     ctx.log('Changed files: none')


Test patch:
Repository: pallets/click

Issue:
OSError on MinGW64 with MSYS2 on Windows 8.1
A most basic script containing:

    import click
    click.echo('run')

Produces the following stacktrace:

    Traceback (most recent call last):
      File "t.py", line 3, in <module>
        click.echo('run')
      File "C:/msys64/mingw64/lib/python3.7/site-packages\click\utils.py", line 260, in echo
        file.write(message)
      File "C:/msys64/mingw64/lib/python3.7/site-packages\click\_compat.py", line 630, in _safe_write
        return _write(s)
      File "C:/msys64/mingw64/lib/python3.7/site-packages\colorama\ansitowin32.py", line 41, in write
        self.__convertor.write(text)
      File "C:/msys64/mingw64/lib/python3.7/site-packages\colorama\ansitowin32.py", line 164, in write
        self.wrapped.write(text)
      File "C:/msys64/mingw64/lib/python3.7/site-packages\click\_winconsole.py", line 180, in write
        return self._text_stream.write(x)
      File "C:/msys64/mingw64/lib/python3.7/site-packages\click\_winconsole.py", line 164, in write
        raise OSError(self._get_error_message(GetLastError()))
    OSError: Windows error 1


I am running under a MinGW64 bash shell installed through MSYS2 on a Windows 8.1 machine. 
This is with Python 3.7, colorama 0.4.1, and Click 7.0, but the error goes back to 6.0, whereas it does not occur on 5.1. Python 2 does not exhibit the error.


Discussion:
None of MinGW, MSYS2, or Windows 8.1 are officially supported, but I'll leave this open for a while in case someone sees something.
I can reproduce this issue with MSYS2 in Windows 10 when trying to use black which depends on click.

Resolving patch:
diff --git a/click/_compat.py b/click/_compat.py
--- a/click/_compat.py
+++ b/click/_compat.py
@@ -8,10 +8,11 @@
 
 PY2 = sys.version_info[0] == 2
 CYGWIN = sys.platform.startswith('cygwin')
+MSYS2 = sys.platform.startswith('win') and ('GCC' in sys.version)
 # Determine local App Engine environment, per Google's own suggestion
 APP_ENGINE = ('APPENGINE_RUNTIME' in os.environ and
               'Development/' in os.environ['SERVER_SOFTWARE'])
-WIN = sys.platform.startswith('win') and not APP_ENGINE
+WIN = sys.platform.startswith('win') and not APP_ENGINE and not MSYS2
 DEFAULT_COLUMNS = 80
 
 


Test patch:
Repository: pallets/click

Issue:
Option to reask on no input in `click.confirm`
It would be nice if similarly to `click.prompt`, `click.confirm` would allow to reask the user if no input is given.


Discussion:

Resolving patch:
diff --git a/src/click/termui.py b/src/click/termui.py
--- a/src/click/termui.py
+++ b/src/click/termui.py
@@ -172,21 +172,29 @@ def confirm(
     If the user aborts the input by sending a interrupt signal this
     function will catch it and raise a :exc:`Abort` exception.
 
-    .. versionadded:: 4.0
-       Added the `err` parameter.
-
     :param text: the question to ask.
-    :param default: the default for the prompt.
+    :param default: The default value to use when no input is given. If
+        ``None``, repeat until input is given.
     :param abort: if this is set to `True` a negative answer aborts the
                   exception by raising :exc:`Abort`.
     :param prompt_suffix: a suffix that should be added to the prompt.
     :param show_default: shows or hides the default value in the prompt.
     :param err: if set to true the file defaults to ``stderr`` instead of
                 ``stdout``, the same as with echo.
+
+    .. versionchanged:: 8.0
+        Repeat until input is given if ``default`` is ``None``.
+
+    .. versionadded:: 4.0
+        Added the ``err`` parameter.
     """
     prompt = _build_prompt(
-        text, prompt_suffix, show_default, "Y/n" if default else "y/N"
+        text,
+        prompt_suffix,
+        show_default,
+        "y/n" if default is None else ("Y/n" if default else "y/N"),
     )
+
     while 1:
         try:
             # Write the prompt separately so that we get nice
@@ -199,7 +207,7 @@ def confirm(
             rv = True
         elif value in ("n", "no"):
             rv = False
-        elif value == "":
+        elif default is not None and value == "":
             rv = default
         else:
             echo("Error: invalid input", err=err)


Test patch:
diff --git a/tests/test_utils.py b/tests/test_utils.py
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -131,6 +131,14 @@ def test_no():
     assert result.output == "Foo [Y/n]: n\nno :(\n"
 
 
+def test_confirm_repeat(runner):
+    cli = click.Command(
+        "cli", params=[click.Option(["--a/--no-a"], default=None, prompt=True)]
+    )
+    result = runner.invoke(cli, input="\ny\n")
+    assert result.output == "A [y/n]: \nError: invalid input\nA [y/n]: y\n"
+
+
 @pytest.mark.skipif(WIN, reason="Different behavior on windows.")
 def test_prompts_abort(monkeypatch, capsys):
     def f(_):
Repository: pallets/click

Issue:
Use difflib for potential suggestions in cli error messages
Currently click only does startswith match at https://github.com/pallets/click/blob/6c454c88b76f7a0be396dba72513bd316cd141e6/click/parser.py#L328-L329 so a typo like using `--boun` suggests `--bount` but using `--bound` doesn't make any suggestions. Using [difflib.get_close_matches](https://docs.python.org/3/library/difflib.html#difflib.get_close_matches) could get better suggestions and nearest matches.

Sample implementation : https://github.com/tirkarthi/click/tree/difflib-suggestions

```python
import click

@click.option("--count")
@click.option("--bount")
@click.command()
def cli(count, bount):
    click.echo(f"count = {count}, bount = {bount}")

if __name__ == "__main__":
    cli()
```

```shell
python sample.py --boun 1 
Usage: sample.py [OPTIONS]
Try "sample.py --help" for help.

Error: no such option: --boun  Did you mean --bount?
```

```shell
python sample.py --bound 1
Usage: sample.py [OPTIONS]
Try "sample.py --help" for help.

Error: no such option: --bound
```

Using `--bound` with `difflib.get_close_matches`

```shell
python sample.py --bound 1
Usage: sample.py [OPTIONS]
Try "sample.py --help" for help.

Error: no such option: --bound  (Possible options: --bount, --count)
```

Using `--counter` with `difflib.get_close_matches`

```shell
python sample.py --counter 1
Usage: sample.py [OPTIONS]
Try "sample.py --help" for help.

Error: no such option: --counter  (Possible options: --count, --bount)
```


Discussion:

Resolving patch:
diff --git a/src/click/parser.py b/src/click/parser.py
--- a/src/click/parser.py
+++ b/src/click/parser.py
@@ -329,7 +329,9 @@ def _process_args_for_options(self, state):
 
     def _match_long_opt(self, opt, explicit_value, state):
         if opt not in self._long_opt:
-            possibilities = [word for word in self._long_opt if word.startswith(opt)]
+            from difflib import get_close_matches
+
+            possibilities = get_close_matches(opt, self._long_opt)
             raise NoSuchOption(opt, possibilities=possibilities, ctx=self.ctx)
 
         option = self._long_opt[opt]


Test patch:
diff --git a/tests/test_options.py b/tests/test_options.py
--- a/tests/test_options.py
+++ b/tests/test_options.py
@@ -86,6 +86,22 @@ def cli():
     assert f"no such option: {unknown_flag}" in result.output
 
 
+@pytest.mark.parametrize(
+    ("value", "expect"),
+    [
+        ("--cat", "Did you mean --count?"),
+        ("--bounds", "(Possible options: --bound, --count)"),
+        ("--bount", "(Possible options: --bound, --count)"),
+    ],
+)
+def test_suggest_possible_options(runner, value, expect):
+    cli = click.Command(
+        "cli", params=[click.Option(["--bound"]), click.Option(["--count"])]
+    )
+    result = runner.invoke(cli, [value])
+    assert expect in result.output
+
+
 def test_multiple_required(runner):
     @click.command()
     @click.option("-m", "--message", multiple=True, required=True)
Repository: pallets/click

Issue:
Friendly __repr__ for Command
```python
(Pdb) pp cmd
<click.core.Command object at 0x7ff869ef1550>
(Pdb) pp cmd.name
'run-gunicorn'
```
What do you think of showing the command name in the `__repr__` string, for friendlier debugging? Could be a good beginner-friendly issue!


Discussion:
I'm going to take a stab at this

Resolving patch:
diff --git a/click/core.py b/click/core.py
--- a/click/core.py
+++ b/click/core.py
@@ -622,6 +622,9 @@ def __init__(self, name, context_settings=None):
         #: an optional dictionary with defaults passed to the context.
         self.context_settings = context_settings
 
+    def __repr__(self):
+        return "<%s %s>" % (self.__class__.__name__, self.name)
+
     def get_usage(self, ctx):
         raise NotImplementedError('Base commands cannot get usage')
 
@@ -1393,6 +1396,9 @@ def __init__(self, param_decls=None, type=None, required=False,
         self.envvar = envvar
         self.autocompletion = autocompletion
 
+    def __repr__(self):
+        return "<%s %s>" % (self.__class__.__name__, self.name)
+
     @property
     def human_readable_name(self):
         """Returns the human readable name of this parameter.  This is the


Test patch:
diff --git a/tests/test_basic.py b/tests/test_basic.py
--- a/tests/test_basic.py
+++ b/tests/test_basic.py
@@ -23,6 +23,24 @@ def cli():
     assert result.exit_code == 0
 
 
+def test_repr():
+    @click.command()
+    def command():
+        pass
+
+    @click.group()
+    def group():
+        pass
+
+    @group.command()
+    def subcommand():
+        pass
+
+    assert repr(command) == '<Command command>'
+    assert repr(group) == '<Group group>'
+    assert repr(subcommand) == '<Command subcommand>'
+
+
 def test_return_values():
     @click.command()
     def cli():
Repository: pallets/click

Issue:
ClickException message goes to stdout instead of stderr with version 7.1
Thanks a lot for ``click`` - absolutely fantastic project. 

I've noticed the following change when upgrading to 7.1, and am not sure if it's intentional or not:

### Expected Behavior

When raising ``click.ClickException``, the corresponding ``Error: <message>`` goes to ``stderr`` using click version 7.0.

Minimal reproducing code:

```python
import click

@click.command()
def run():
    raise click.ClickException('exception message')

if __name__ == '__main__':
    run()
```
```bash
python <filename>.py 1> stdout 2> stderr
```

### Actual Behavior

With version 7.1, the ``Error: exception message`` ends up in ``stdout`` instead of ``stderr``.

### Environment

* Python version: Python 3.7.5
* Click version: 7.1
* OS: Ubuntu 18.04 [through WSL1]
* Shell: GNU bash, version 4.4.20

### Additional comments

As mentioned above I'm not sure if this is an intended change, but I couldn't find any mention on the [Changelog](https://click.palletsprojects.com/en/7.x/changelog/#version-7-1), and [this part](https://click.palletsprojects.com/en/7.x/exceptions/#which-exceptions-exist) of the docs still referes to ``show`` being printed to ``stderr``.

Happy to do some more digging if this happens only on my system.



Discussion:
I believe the cause for this is that ``file`` is passed to ``format`` instead of ``echo`` here: https://github.com/pallets/click/blob/master/src/click/exceptions.py#L42
Wow, that's my bad, misplaced a paren. Fix coming soon.
No worries, and thanks again for the awesome project.

Resolving patch:
diff --git a/src/click/exceptions.py b/src/click/exceptions.py
--- a/src/click/exceptions.py
+++ b/src/click/exceptions.py
@@ -39,7 +39,7 @@ def __str__(self):
     def show(self, file=None):
         if file is None:
             file = get_text_stderr()
-        echo("Error: {}".format(self.format_message(), file=file))
+        echo("Error: {}".format(self.format_message()), file=file)
 
 
 class UsageError(ClickException):


Test patch: