action.yml

name: 'GitHub Space Shooter'
description: 'Transform your GitHub contribution graph into a space shooter game GIF'
author: 'zane'

branding:
  icon: 'navigation-2'
  color: 'black'

inputs:
  github-token:
    description: 'GitHub token for fetching contribution data (usually secrets.GITHUB_TOKEN)'
    required: true
  username:
    description: 'GitHub username to generate game for (defaults to repository owner)'
    required: false
    default: ${{ github.repository_owner }}
  output-path:
    description: 'Path where the GIF should be saved'
    required: false
    default: 'gh-space-shooter.gif'
  strategy:
    description: 'Enemy attack strategy (column, row, or random)'
    required: false
    default: 'random'
  fps:
    description: 'Frames per second for the animation (default: 40)'
    required: false
    default: '40'
  no-amend:
    description: 'Disable amending previous commits (always create new commits)'
    required: false
    default: 'false'
  commit-message:
    description: 'Commit message for the GIF update'
    required: false
    default: 'Update space shooter game GIF'

outputs:
  output-file:
    description: 'Path to the generated output file (GIF or WebP)'
    value: ${{ steps.generate.outputs.output-file }}

runs:
  using: 'composite'
  steps:
    - name: Set up Python
      uses: actions/setup-python@v6
      with:
        python-version: '3.12'

    - name: Install gh-space-shooter
      shell: bash
      run: |
        python -m pip install --upgrade pip
        pip install gh-space-shooter

    - name: Generate game
      id: generate
      shell: bash
      env:
        GH_TOKEN: ${{ inputs.github-token }}
      run: |
        gh-space-shooter ${{ inputs.username }} \
          --output ${{ inputs.output-path }} \
          --strategy ${{ inputs.strategy }} \
          --fps ${{ inputs.fps }}
        echo "output-file=${{ inputs.output-path }}" >> $GITHUB_OUTPUT

    - name: Commit and push
      shell: bash
      run: |
        git config --local user.email "github-actions[bot]@users.noreply.github.com"
        git config --local user.name "github-actions[bot]"

        OUTPUT_PATH="${{ inputs.output-path }}"
        COMMIT_MSG="${{ inputs.commit-message }}"
        NO_AMEND="${{ inputs.no-amend }}"

        git add "$OUTPUT_PATH"

        SHOULD_AMEND="false"
        if [ "$NO_AMEND" != "true" ]; then
          git log -1 --oneline
        
          LAST_MSG=$(git log -1 --pretty=%s 2>/dev/null || echo "")
          LAST_FILES=$(git log -1 --name-only --pretty=format: 2>/dev/null | grep -v '^$' || echo "")

          echo "LAST_MSG: ${LAST_MSG} | COMMIT_MSG: ${COMMIT_MSG}"
          echo "LAST_FILES: ${LAST_FILES} | OUTPUT_PATH: ${OUTPUT_PATH}"

          if [ "$LAST_MSG" = "$COMMIT_MSG" ] && [ "$LAST_FILES" = "$OUTPUT_PATH" ]; then
            SHOULD_AMEND="true"
          fi
        fi

        if [ "$SHOULD_AMEND" = "true" ]; then
          echo "Amending previous commit (same message and file)"
          git commit --amend --no-edit
          git push --force-with-lease
        else
          echo "Creating new commit"
          git diff --staged --quiet || git commit -m "$COMMIT_MSG"
          git push
        fi