action.yml

name: 'md-babel-py'
description: 'Execute code blocks in markdown files'
author: 'Ivan Nikolic'

branding:
  icon: 'file-text'
  color: 'blue'

inputs:
  files:
    description: 'Markdown files to process (glob pattern or space-separated list)'
    required: true
  args:
    description: 'Additional arguments to pass to md-babel-py'
    required: false
    default: ''
  fail-on-change:
    description: 'Fail if files were modified (useful for CI checks)'
    required: false
    default: 'false'

outputs:
  changed-files:
    description: 'List of files that were modified'
    value: ${{ steps.run.outputs.changed }}

runs:
  using: 'composite'
  steps:
    - name: Run md-babel-py
      id: run
      shell: bash
      run: |
        changed=""

        # Expand globs and process each file
        for pattern in ${{ inputs.files }}; do
          for file in $pattern; do
            [ -f "$file" ] || continue
            echo "Processing: $file"

            # Get hash before
            hash_before=$(sha256sum "$file" | cut -d' ' -f1)

            # Run md-babel-py
            docker run --rm -v "$PWD":/work lesh/md-babel-py:main run "/work/$file" ${{ inputs.args }}

            # Get hash after
            hash_after=$(sha256sum "$file" | cut -d' ' -f1)

            if [ "$hash_before" != "$hash_after" ]; then
              echo "  -> Modified"
              changed="$changed $file"
            fi
          done
        done

        echo "changed=${changed# }" >> "$GITHUB_OUTPUT"

        if [ "${{ inputs.fail-on-change }}" = "true" ] && [ -n "$changed" ]; then
          echo "::error::Files were modified: $changed"
          exit 1
        fi