Click

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Released 2022-03-31

- Fix error message for readable path check that was mixed up with the
executable check. :pr:`2236`
- Restore parameter order for ``Path``, placing the ``executable``
parameter at the end. It is recommended to use keyword arguments
instead of positional arguments. :issue:`2235`

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Released 2022-03-30

- Fix an issue with decorator typing that caused type checking to
report that a command was not callable. :issue:`2227`

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Released 2022-03-28

- Drop support for Python 3.6. :pr:`2129`
- Remove previously deprecated code. :pr:`2130`

- ``Group.resultcallback`` is renamed to ``result_callback``.
- ``autocompletion`` parameter to ``Command`` is renamed to
``shell_complete``.
- ``get_terminal_size`` is removed, use
``shutil.get_terminal_size`` instead.
- ``get_os_args`` is removed, use ``sys.argv[1:]`` instead.

- Rely on :pep:`538` and :pep:`540` to handle selecting UTF-8 encoding
instead of ASCII. Click's locale encoding detection is removed.
:issue:`2198`
- Single options boolean flags with ``show_default=True`` only show
the default if it is ``True``. :issue:`1971`
- The ``command`` and ``group`` decorators can be applied with or
without parentheses. :issue:`1359`
- The ``Path`` type can check whether the target is executable.
:issue:`1961`
- ``Command.show_default`` overrides ``Context.show_default``, instead
of the other way around. :issue:`1963`
- Parameter decorators and ``group`` handles ``cls=None`` the same as
not passing ``cls``. ``option`` handles ``help=None`` the same as
not passing ``help``. :issue:`1959`
- A flag option with ``required=True`` requires that the flag is
passed instead of choosing the implicit default value. :issue:`1978`
- Indentation in help text passed to ``Option`` and ``Command`` is
cleaned the same as using the ``option`` and ``command``
decorators does. A command's ``epilog`` and ``short_help`` are also
processed. :issue:`1985`
- Store unprocessed ``Command.help``, ``epilog`` and ``short_help``
strings. Processing is only done when formatting help text for
output. :issue:`2149`
- Allow empty str input for ``prompt()`` when
``confirmation_prompt=True`` and ``default=""``. :issue:`2157`
- Windows glob pattern expansion doesn't fail if a value is an invalid
pattern. :issue:`2195`
- It's possible to pass a list of ``params`` to ``command``. Any
params defined with decorators are appended to the passed params.
:issue:`2131`.
- ``command`` decorator is annotated as returning the correct type if
a ``cls`` argument is used. :issue:`2211`
- A ``Group`` with ``invoke_without_command=True`` and ``chain=False``
will invoke its result callback with the group function's return
value. :issue:`2124`
- ``to_info_dict`` will not fail if a ``ParamType`` doesn't define a
``name``. :issue:`2168`
- Shell completion prioritizes option values with option prefixes over
new options. :issue:`2040`
- Options that get an environment variable value using
``autoenvvar_prefix`` treat an empty value as ``None``, consistent
with a direct ``envvar``. :issue:`2146`

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Released 2022-02-18

- ``open_file`` recognizes ``Path("-")`` as a standard stream, the
same as the string ``"-"``. :issue:`2106`
- The ``option`` and ``argument`` decorators preserve the type
annotation of the decorated function. :pr:`2155`
- A callable default value can customize its help text by overriding
``__str__`` instead of always showing ``(dynamic)``. :issue:`2099`
- Fix a typo in the Bash completion script that affected file and
directory completion. If this script was generated by a previous
version, it should be regenerated. :issue:`2163`
- Fix typing for ``echo`` and ``secho`` file argument.
:issue:`2174, 2185`

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Released 2021-10-10

- Fix issue with ``Path(resolve_path=True)`` type creating invalid
paths. :issue:`2088`
- Importing ``readline`` does not cause the ``confirm()`` prompt to
disappear when pressing backspace. :issue:`2092`
- Any default values injected by ``invoke()`` are cast to the
corresponding parameter's type. :issue:`2089, 2090`

-------------

Released 2021-10-08

- ``is_bool_flag`` is not set to ``True`` if ``is_flag`` is ``False``.
:issue:`1925`
- Bash version detection is locale independent. :issue:`1940`
- Empty ``default`` value is not shown for ``multiple=True``.
:issue:`1969`
- Fix shell completion for arguments that start with a forward slash
such as absolute file paths. :issue:`1929`
- ``Path`` type with ``resolve_path=True`` resolves relative symlinks
to be relative to the containing directory. :issue:`1921`
- Completion does not skip Python's resource cleanup when exiting,
avoiding some unexpected warning output. :issue:`1738, 2017`
- Fix type annotation for ``type`` argument in ``prompt`` function.
:issue:`2062`
- Fix overline and italic styles, which were incorrectly added when
adding underline. :pr:`2058`
- An option with ``count=True`` will not show "[x>=0]" in help text.
:issue:`2072`
- Default values are not cast to the parameter type twice during
processing. :issue:`2085`
- Options with ``multiple`` and ``flag_value`` use the flag value
instead of leaving an internal placeholder. :issue:`2001`