Javaファイルを自動フォーマット

auto-format.yml

name: Auto Format
on: pull_request

jobs:
  format:
    runs-on: ubuntu-latest
    steps:
      - name: Set up Workspace
        uses: actions/checkout@v3
        with:
          ref: ${{ github.head_ref }}
          fetch-depth: 0

      - name: Set up JDK
        uses: actions/setup-java@v3
        with:
          distribution: adopt
          java-version: 17

      - name: Format Java file
        run: |
          wget -q -O google-java-format.jar \
            https://github.com/google/google-java-format/releases/download/v1.15.0/google-java-format-1.15.0-all-deps.jar
          java -jar google-java-format.jar -replace $(git diff origin/${GITHUB_BASE_REF} HEAD --name-only)

      - name: Check for modified files
        id: git-check
        run: echo ::set-output name=modified::$(if git diff-index --quiet HEAD --; then echo "false"; else echo "true"; fi)

      - name: Push auto-formatted files
        if: steps.git-check.outputs.modified == 'true'
        # commitするユーザーはgithub-actionsのボットにする
        run: |
          git remote set-url origin https://github-actions:${GITHUB_TOKEN}@github.com/${GITHUB_REPOSITORY}
          git config --global user.name "github-actions[bot]"
          git config --global user.email "41898282+github-actions[bot]@users.noreply.github.com"
          // 新規追加されたgoogle-java-format.jarを除くファイルをインデックスに追加
          git add -u
          git commit -m "Auto formatted by github-actions"
          git push origin HEAD:${GITHUB_HEAD_REF}
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}