auto-release.yml

name: Auto Release

on:
  schedule:
    - cron: '0 0 * * *'  # daily at 00:00 UTC
  workflow_dispatch:     # manual trigger via `Actions` tab

jobs:
  build-and-push-image:
    runs-on: ubuntu-latest

    permissions:
      contents: write
      packages: write
      attestations: write
      id-token: write

    steps:
      - name: Enable QEMU for multi-arch support
        uses: docker/setup-qemu-action@v2
        with:
          platforms: all

      - name: Boot up Buildx
        uses: docker/setup-buildx-action@v2

      - name: Check out code
        uses: actions/checkout@v4
        with:
          fetch-depth: 0  # fetch all tags for release checking

      - name: Login to GHCR
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Fetch latest TailwindCSS release
        id: get-latest-release
        uses: pozetroninc/github-action-get-latest-release@v0.8.0
        with:
          repository: tailwindlabs/tailwindcss

      - name: Strip leading "v" from version
        id: strip-v
        run: |
          # grab the raw output (e.g. "v4.1.7")
          vtag="${{ steps.get-latest-release.outputs.release }}"
          # remove one leading "v"
          clean_vtag="${vtag#v}"
          # expose it as an output
          echo "version_no_v=${clean_vtag}" >> $GITHUB_OUTPUT
          echo "full_version=${vtag}" >> $GITHUB_OUTPUT

      - name: Check if release already exists
        id: check-release
        run: |
          # Check if we already have a release for this version
          version="${{ steps.strip-v.outputs.full_version }}"
          if git tag -l | grep -q "^${version}$"; then
            echo "exists=true" >> $GITHUB_OUTPUT
            echo "Release ${version} already exists, skipping build"
          else
            echo "exists=false" >> $GITHUB_OUTPUT
            echo "Release ${version} does not exist, will build and create"
          fi

      - name: Build & push multi-arch
        if: steps.check-release.outputs.exists == 'false'  # Only build if new version
        uses: docker/build-push-action@v4
        with:
          context: .
          file: Dockerfile
          push: true
          platforms: linux/amd64, linux/arm64
          tags: |
            ghcr.io/scriptogre/tailwindcss:latest
            ghcr.io/scriptogre/tailwindcss:${{ steps.strip-v.outputs.version_no_v }}
          build-args: |
            TAILWINDCSS_VERSION=${{ steps.strip-v.outputs.version_no_v }}

      - name: Create and push tag
        if: steps.check-release.outputs.exists == 'false'
        run: |
          version="${{ steps.strip-v.outputs.full_version }}"
          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"
          git tag -a "${version}" -m "Auto-release for TailwindCSS ${version}"
          git push origin "${version}"

      - name: Create GitHub Release
        if: steps.check-release.outputs.exists == 'false'
        uses: softprops/action-gh-release@v1
        with:
          tag_name: ${{ steps.strip-v.outputs.full_version }}
          name: ${{ steps.strip-v.outputs.full_version }}
          body: |
            Automatic release for TailwindCSS ${{ steps.strip-v.outputs.full_version }}
            
            1. Create `input.css` in your project:
            ```css
            @import 'tailwindcss';
            ``` 
            
            2. Create `docker-compose.yml` in your project:
            ```yaml
            services:
              tailwindcss:
                image: ghcr.io/scriptogre/tailwindcss:${{ steps.strip-v.outputs.version_no_v }}
                tty: true  # Required for watch mode
                volumes:
                  - .:/app
                command: -i ./input.css -o ./output.css --watch
            ```
            
            3. Or run `docker run` command (note the `-t` flag is required for watch mode):
            ```bash
            docker run -t -v "$(pwd)":/app \
              ghcr.io/scriptogre/tailwindcss:${{ steps.strip-v.outputs.version_no_v }} -i ./input.css -o ./output.css --watch
            ```

            Container available at [ghcr.io/scriptogre/tailwindcss:${{ steps.strip-v.outputs.version_no_v }}](https://ghcr.io/scriptogre/tailwindcss:${{ steps.strip-v.outputs.version_no_v }})
          draft: false
          prerelease: false
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}