update-railpack.yml

name: Update Railpack Binary

on:
  schedule:
    # Runs every Monday at 19:30 UTC
    - cron: "30 19 * * 1"
  workflow_dispatch:

jobs:
  check-version:
    runs-on: ubuntu-latest
    permissions:
      contents: write
      pull-requests: write

    steps:
      - name: Clone repository
        uses: actions/checkout@v6

      - name: Check and Update Version
        id: version_check
        env:
          GH_TOKEN: ${{ secrets.UPDATE_RAILPACK_GITHUB_TOKEN }}
        run: |
          DOCKERFILE="builders/railpack/Dockerfile"

          # Get current version from Dockerfile
          CURRENT_VERSION=$(grep "RAILPACK_VERSION=" "$DOCKERFILE" | cut -d= -f 2)
          echo "Current version: $CURRENT_VERSION"

          # Get the latest version from the Railpack repo
          LATEST_TAG=$(gh release view --repo railwayapp/railpack --json tagName --jq '.tagName')
          LATEST_VERSION="${LATEST_TAG#v}" # Strip the "v" prefix from the tag
          echo "Latest version available: $LATEST_VERSION"

          if [ "$CURRENT_VERSION" != "$LATEST_VERSION" ]; then
            echo "Update found! Updating $DOCKERFILE..."
            # Replace the version in the Dockerfile
            sed -i "s/RAILPACK_VERSION=$CURRENT_VERSION/RAILPACK_VERSION=$LATEST_VERSION/" "$DOCKERFILE"

            # (the `sed` step is to escape @ characters so that they don't ping anyone)
            RELEASE_NOTES=$(gh release view "$LATEST_TAG" --repo railwayapp/railpack --json body --jq '.body' | sed 's/@/\`@\`/g')

            # Export variables for the next step
            echo "updated=true" >> $GITHUB_OUTPUT
            echo "new_version=$LATEST_VERSION" >> $GITHUB_OUTPUT
            echo "notes<<EOF" >> $GITHUB_OUTPUT
            echo "$RELEASE_NOTES" >> $GITHUB_OUTPUT
            echo "EOF" >> $GITHUB_OUTPUT
          else
            echo "Railpack is up to date."
            echo "updated=false" >> $GITHUB_OUTPUT
          fi

      - name: Create Pull Request
        if: steps.version_check.outputs.updated == 'true'
        uses: peter-evans/create-pull-request@v8
        with:
          token: ${{ secrets.UPDATE_RAILPACK_GITHUB_TOKEN }}
          commit-message: "Update Railpack to ${{ steps.version_check.outputs.new_version }}"
          title: "Update Railpack to ${{ steps.version_check.outputs.new_version }}"
          body: |
            Update Railpack to version ${{ steps.version_check.outputs.new_version }}. _This pull request was automatically created by `.github/workflows/update-railpack.yml`._

            ---

            ## Release Notes

            ${{ steps.version_check.outputs.notes }}
          branch: automation/update-railpack
          delete-branch: true # Delete the branch if there are no changes
          labels: dependencies