action.yml

name: "Black"
description: "The uncompromising Python code formatter."
author: "Łukasz Langa and contributors to Black"
inputs:
  options:
    description:
      "Options passed to Black. Use `black --help` to see available options. Default:
      '--check'"
    required: false
    default: "--check --diff"
  src:
    description: "Source to run Black. Default: '.'"
    required: false
    default: "."
  black_args:
    description: "[DEPRECATED] Black input arguments."
    required: false
    default: ""
    deprecationMessage:
      "Input `with.black_args` is deprecated. Use `with.options` and `with.src` instead."
  version:
    description: 'Python Version specifier (PEP440) - e.g. "21.5b1"'
    required: false
    default: ""
branding:
  color: "black"
  icon: "check-circle"
runs:
  using: composite
  steps:
    - 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_BLACK_ARGS: ${{ inputs.black_args }}
        INPUT_VERSION: ${{ inputs.version }}
        pythonioencoding: utf-8
      shell: bash