Bump akaihola/darker from 2.1.1 to 3.0.0

[dependabot]

Bumps akaihola/darker from 2.1.1 to 3.0.0.

Release notes

Sourced from akaihola/darker's releases.

3.0.0

Added

• Ruff formatter support using the --formatter=ruff command line option or formatter = "ruff" configuration file option.
• The --formatter=black option (the default) has been added.
• pyupgrade is now supported as a formatter plugin (--formatter=pyupgrade on CLI, formatter = "pyupgrade" in config file). Note that changes from pyupgrade are applied on a per-fi>
• --formatter=none now skips running Black, Ruff or pyupgrade. This is useful when you only want to run [isort](https://py>
• The --preview configuration flag is now supported in the configuration files for Darker and Black.
• Add official support for Python 3.13.
• New exit codes 2 for file not found, 3 for invalid command line arguments, 4 for missing dependencies and 123 for unknown failures.
• Display exit code in parentheses after error message.
• Do not reformat renamed files.
• Respect the skip_glob setting of isort.

Removed

• Backwards incompatible change: Baseline linting support (-L/--lint option) has been removed. Use the Graylint tool instead.
• Backwards incompatible change: Black is no longer installed by default. Use pip install 'darker[black]' to get Black support.
• Drop support for Python 3.8.
• In the Darker configuration file under [tool.darker], the Black configuration options skip_string_normalization and skip_magic_trailing_comma are no longer valid. Use [tool.black] instead.
• Drop support for isort 5.1.x.
• Drop support for Pylint earlier than 3.3.0.

Fixed

• Update to Darkgraylib 2.4.0 to fix the configuration dump, the output of --version, the Git "dubious ownership" issue, and source code line splitting (see below).
• In the configuration dump printed when -vv verbosity is used, the configuration section is now correctly named [tool.darker] instead of [tool.darkgraylib].
• Pass Darker version to darkgraylib.command_line.make_argument_parser to make --version display the correct version number.
• Pass full environment to Git to avoid the "dubious ownership" error.
• Work around a pathlib.Path.resolve bug in Python 3.9 on Windows. The work-around should be removed when Python 3.9 is no longer supported.
• Add missing configuration flag for Flynt.
• Only split source code lines at Python's universal newlines (LF, CRLF, CR).
• The Darker GitHub action now respects the working-directory input option.

Internal

• CI workflow to post recent project activity in a discussion. Triggered manually.
• CI "future" test now tests against main of Darkgraylib in addition to Black, Flynt and [isort](https://pycq>
• Prevent Pylint from updating beyond version 3.2.7 due to dropped Python 3.8 support.
• Invoking Black is now implemented as a plugin. This allows for easier integration of other formatters in the future. There's also a dummy none formatter plugin.
• Update darkgray-dev-tools for Pip >= 24.1 compatibility.
• Drop dependency on pip and distutils in the weekly CI "future" test. Use packaging instead.
• No need to use [typing.Pattern]{.title-ref} instead of [re.Pattern]{.title-ref} in Python 3.9+.
• Always use newest artifact upload/download actions from the v4 series in the CI build.
• Use [datetime.datetime.now()]{.title-ref}, not .utcnow() to silence a deprecation warning.
• Suppress logging about Flynt unless Flynt is enabled.
• Update to Mypy 1.15+ and use the explicit-any ignore.
• Switch from old defunct Bandit action to brunohaf/action-bandit.
• Format YAML files to satisfy yaml-lint and fix workflow syntax.
• Use UV across all CI workflow actions, and enable caching of packages.

... (truncated)

Changelog

Sourced from akaihola/darker's changelog.

3.0.0_ - 2025-09-01

Added

• Ruff_ formatter support using the --formatter=ruff command line option or formatter = "ruff" configuration file option.
• The --formatter=black option (the default) has been added.
• pyupgrade_ is now supported as a formatter plugin (--formatter=pyupgrade on CLI, formatter = "pyupgrade" in config file). Note that changes from pyupgrade are applied on a per-file basis, not only for modified lines as with Black_ and Ruff_.
• --formatter=none now skips running Black_, Ruff_ or pyupgrade_. This is useful when you only want to run isort_ or Flynt_.
• The --preview configuration flag is now supported in the configuration files for Darker and Black_.
• Add official support for Python 3.13.
• New exit codes 2 for file not found, 3 for invalid command line arguments, 4 for missing dependencies and 123 for unknown failures.
• Display exit code in parentheses after error message.
• Do not reformat renamed files.
• Respect the skip_glob setting of isort_.

Removed

• Backwards incompatible change: Baseline linting support (-L/--lint option) has been removed. Use the Graylint_ tool instead.
• Backwards incompatible change: Black_ is no longer installed by default. Use pip install 'darker[black]' to get Black support.
• Drop support for Python 3.8.
• In the Darker configuration file under [tool.darker], the Black configuration options skip_string_normalization and skip_magic_trailing_comma are no longer valid. Use [tool.black] instead.
• Drop support for isort_ 5.1.x.
• Drop support for Pylint earlier than 3.3.0.

Fixed

• Update to Darkgraylib_ 2.4.0 to fix the configuration dump, the output of --version, the Git "dubious ownership" issue, and source code line splitting (see below).
• In the configuration dump printed when -vv verbosity is used, the configuration section is now correctly named [tool.darker] instead of [tool.darkgraylib].
• Pass Darker version to darkgraylib.command_line.make_argument_parser to make --version display the correct version number.
• Pass full environment to Git to avoid the "dubious ownership" error.
• Work around a pathlib.Path.resolve bug in Python 3.9 on Windows. The work-around should be removed when Python 3.9 is no longer supported.
• Add missing configuration flag for Flynt_.
• Only split source code lines at Python's universal newlines (LF, CRLF, CR).
• The Darker GitHub action now respects the working-directory input option.

... (truncated)

Commits

• 7f70a5b Merge pull request #843 from akaihola/release-3.0.0
• b66232f docs: Additions to readme and change log
• fe80d3a chore: bump version to 3.0.0
• 0e8dbe2 Merge pull request #842 from akaihola/better-missing-black-error
• 932a2d6 feat: in the run-time error, clarify Black dependency removal was in v3.0.0
• c393977 Merge pull request #748 from akaihola/pylint-too-many-args
• d350b9f ci: run Pylint through Graylint
• 01256aa chore: annotate types in some test helpers and fixtures
• 45f6643 style: avoid long lines with pylint ignores
• d63b585 docs: update the change log
• Additional commits viewable in compare view

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