action.yml

---
name: "Darker"
description: "Apply Black, isort and linters to modified lines only."
author: "Antti Kaihola and contributors to Darker"
inputs:
  options:
    description: >-
      Options passed to Darker. Use `darker --help` to see available options.
      Default: '--check --diff --color'
    required: false
    default: "--check --diff --color"
  src:
    description: "Source to run Darker. Default: '.'"
    required: false
    default: "."
  version:
    description: 'Version of Darker to use, e.g. "~=2.1.1", "2.1.1", "@master"'
    required: false
    default: "~=2.1.1"
  revision:
    description: >-
      Git revision range to compare when determining modified lines.
      Determined automatically if omitted.
    required: false
  lint:
    description: >-
      NOTE: Baseline linting has been moved to the Graylint package.
    required: false
    default: ''
  working-directory:
    description: >-
      Directory to run Darker in, either absolute or relative to
      $GITHUB_WORKSPACE. By default, Darker is run in $GITHUB_WORKSPACE.
    required: false
    default: '.'
outputs:
  exitcode:
    description: "Exit code of Darker"
    value: ${{ steps.darker.outputs.exitcode }}
  stdout:
    description: "Standard output of Darker"
    value: ${{ steps.darker.outputs.stdout }}
branding:
  color: "black"
  icon: "check-circle"
runs:
  using: composite
  steps:
    - name: Commit Range
      id: commit-range
      uses: ./.github/actions/commit-range
    - name: Set up Python
      uses: actions/setup-python@v5
      with:
        python-version: '3.x'
        cache: 'pip'
    - name: Install dependencies
      run: |
        pip install pip-requirements-parser
      shell: bash
    - name: Run Darker
      id: darker
      run: |
        # Exists since using github.action_path + path to main script doesn't
        # work because bash interprets the backslashes in github.action_path
        # (which are used when the runner OS is Windows) destroying the path to
        # the target file.
        #
        # Also semicolons are necessary because I can't get the newlines to work
        entrypoint="import sys;
        import subprocess;
        from pathlib import Path;

        MAIN_SCRIPT = Path(r'${{ github.action_path }}') / 'action' / 'main.py';

        proc = subprocess.run([sys.executable, str(MAIN_SCRIPT)]);
        sys.exit(proc.returncode)
        "

        if [ "$RUNNER_OS" == "Windows" ]; then
          echo $entrypoint | python
        else
          echo $entrypoint | python3
        fi
      env:
        # TODO: Remove once https://github.com/actions/runner/issues/665 is
        #       fixed.
        INPUT_OPTIONS: ${{ inputs.options }}
        INPUT_SRC: ${{ inputs.src }}
        INPUT_VERSION: ${{ inputs.version }}
        INPUT_REVISION: ${{ inputs.revision }}
        INPUT_LINT: ${{ inputs.lint }}
        INPUT_COMMIT_RANGE: ${{ steps.commit-range.outputs.commit-range }}
        INPUT_WORKING_DIRECTORY: ${{ inputs.working-directory }}
        pythonioencoding: utf-8
      shell: bash