name: Release

on:
  push:
    tags:
      - 'v*'

permissions:
  contents: write
  packages: write

jobs:
  ci:
    uses: ./.github/workflows/ci.yml

  build:
    name: Build Docker (${{ matrix.platform }})
    needs: ci
    strategy:
      fail-fast: true
      matrix:
        include:
          - platform: linux/amd64
            runner: ubuntu-latest
          - platform: linux/arm64
            runner: ubuntu-24.04-arm
    runs-on: ${{ matrix.runner }}
    steps:
      - uses: actions/checkout@v4

      - name: Extract metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ghcr.io/${{ github.repository }}

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

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

      - name: Build and push by digest
        id: build
        uses: docker/build-push-action@v6
        with:
          context: .
          platforms: ${{ matrix.platform }}
          labels: ${{ steps.meta.outputs.labels }}
          provenance: false
          cache-from: type=gha,scope=${{ matrix.platform }}
          cache-to: type=gha,scope=${{ matrix.platform }},mode=max
          outputs: type=image,"name=ghcr.io/${{ github.repository }}",push-by-digest=true,name-canonical=true,push=true

      - name: Export digest
        run: |
          mkdir -p ${{ runner.temp }}/digests
          digest="${{ steps.build.outputs.digest }}"
          touch "${{ runner.temp }}/digests/${digest#sha256:}"

      - name: Upload digest
        uses: actions/upload-artifact@v4
        with:
          name: digest-${{ matrix.runner }}
          path: ${{ runner.temp }}/digests/*
          if-no-files-found: error
          retention-days: 1

  merge:
    name: Merge manifests & release
    runs-on: ubuntu-latest
    needs: build
    steps:
      - uses: actions/checkout@v4

      - name: Download digests
        uses: actions/download-artifact@v4
        with:
          path: ${{ runner.temp }}/digests
          pattern: digest-*
          merge-multiple: true

      - name: Extract metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ghcr.io/${{ github.repository }}
          tags: |
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=raw,value=latest

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

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

      - name: Create manifest list and push
        working-directory: ${{ runner.temp }}/digests
        run: |
          docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
            $(printf 'ghcr.io/${{ github.repository }}@sha256:%s ' *)

      - name: Create GitHub Release
        uses: softprops/action-gh-release@v2
        with:
          generate_release_notes: true

  pin-docker-compose:
    name: Pin docker-compose to released version
    runs-on: ubuntu-latest
    needs: merge
    permissions:
      contents: write
    steps:
      - uses: actions/checkout@v4
        with:
          ref: main
          token: ${{ secrets.GITHUB_TOKEN }}

      - name: Update docker-compose.yml
        env:
          TAG: ${{ github.ref_name }}
        run: |
          VERSION="${TAG#v}"
          sed -i "s|image: ghcr.io/bretzel-app/crumbs:.*|image: ghcr.io/bretzel-app/crumbs:${VERSION}|" docker-compose.yml
          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"
          git add docker-compose.yml
          git diff --cached --quiet && exit 0
          git commit -m "chore: pin docker-compose to ${TAG} [skip ci]"
          git push origin main