homebrew-software/.github/workflows/bump-ttymer.yml

name: Bump TTYmer

on:
  workflow_dispatch:  # manual trigger
  schedule:
    - cron: '0 * * * *'  # hourly check
  repository_dispatch:
    types: [release]

jobs:
  bump-formula:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repo
        uses: actions/checkout@v3

      - name: Setup Ruby (for Homebrew)
        uses: ruby/setup-ruby@v1
        with:
          ruby-version: 3.1

      - name: Install dependencies
        run: gem install --no-document toml-rb

      - name: Fetch latest release tarball URL
        id: release
        uses: actions/github-script@v6
        with:
          result-encoding: string
          script: |
            const release = await github.rest.repos.getLatestRelease({
              owner: 'darwincereska',
              repo: 'ttymer'
            });
            return release.data.tarball_url;

      - name: Calculate SHA256 of tarball
        id: sha256
        run: |
          curl -L -o release.tar.gz "${{ steps.release.outputs.result }}"
          SHA256=$(sha256sum release.tar.gz | awk '{ print $1 }')
          echo "hash=$SHA256" >> $GITHUB_OUTPUT

      - name: Get release version
        id: version
        uses: actions/github-script@v6
        with:
          result-encoding: string
          script: |
            const release = await github.rest.repos.getLatestRelease({
              owner: 'darwincereska',
              repo: 'ttymer'
            });
            return release.data.tag_name;

      - name: Update formula file
        run: |
          VERSION=${{ steps.version.outputs.result }}
          SHA256=${{ steps.sha256.outputs.hash }}
          FORMULA_FILE=Formula/ttymer.rb

          echo "Updating formula to version $VERSION with sha256 $SHA256"

          sed -i "s|url \".*\"|url \"https://github.com/darwincereska/ttymer/archive/refs/tags/${VERSION}.tar.gz\"|g" $FORMULA_FILE
          sed -i "s/sha256 \".*\"/sha256 \"${SHA256}\"/g" $FORMULA_FILE
          sed -i "s/version \".*\"/version \"${VERSION#v}\"/g" $FORMULA_FILE || echo "No version line to update"

      - name: Commit and push if changed
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          git config user.name "GitHub Actions"
          git config user.email "actions@github.com"
          git add Formula/ttymer.rb
          if ! git diff --cached --quiet; then
            git commit -m "Auto-update to build ${{ steps.version.outputs.result }}"
            git push
          else
            echo "No changes to commit"