name: Build / Release

on:
  push:
    branches: [ "main" ]
    tags: [ 'v*.*.*' ]
  pull_request:
    branches: [ "main" ]

jobs:
  docker:
    name: Docker Publish
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write

    steps:
      - name: Checkout repository
        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2

      - name: Set Docker Platforms For Branch
        id: set-platforms
        run: |
          if [[ ${{ startsWith(github.ref, 'refs/tags/v')  }} == 'true' ]]; then
              echo "DOCKER_PLATFORMS=linux/amd64,linux/arm64,linux/arm" >> "$GITHUB_OUTPUT"
          else
              echo "DOCKER_PLATFORMS=linux/amd64" >> "$GITHUB_OUTPUT"
          fi

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@c47758b77c9736f4b2ef4073d4d51994fabfe349 # v3.7.1

      - name: Log into Github Container Registry
        if: github.event_name != 'pull_request'
        uses: docker/login-action@9780b0c442fbb1117ed29e0efdff1e18412f7567 # v3.3.0
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Login to Docker Hub
        if: github.event_name != 'pull_request'
        uses: docker/login-action@9780b0c442fbb1117ed29e0efdff1e18412f7567 # v3.3.0
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_PASSWORD }}

      - name: Extract Docker metadata
        id: meta
        uses: docker/metadata-action@8e5442c4ef9f78752691e2d8f8d19755c6f78e81 # v5.5.1
        with:
          images: |
            evanbuss/opds-proxy
            ghcr.io/${{ github.repository }}
          flavor: |
            latest=auto
          tags: |
            type=edge,branch=main
            type=semver,pattern={{version}}

      # Build and push Docker image with Buildx (don't push on PR)
      - name: Build and push Docker image
        id: build-and-push
        uses: docker/build-push-action@4f58ea79222b3b9dc2c8bbdd6debcef730109a75 # v6.9.0
        with:
          context: .
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          platforms: ${{ steps.set-platforms.outputs.DOCKER_PLATFORMS}}
          cache-from: type=gha
          cache-to: type=gha,mode=max
          build-args: |
            VERSION=${{ fromJSON(steps.meta.outputs.json).labels['org.opencontainers.image.version'] }}
            REVISION=${{ fromJSON(steps.meta.outputs.json).labels['org.opencontainers.image.revision'] }}
            BUILDTIME=${{ fromJSON(steps.meta.outputs.json).labels['org.opencontainers.image.created'] }}

      - name: Docker Hub Description
        uses: peter-evans/dockerhub-description@e98e4d1628a5f3be2be7c231e50981aee98723ae # v4.0.0
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_PASSWORD }}
          repository: evanbuss/opds-proxy
          short-description: Access your OPDS library from any eReader
          enable-url-completion: true # fixes relative image links in README

  release:
    name: Github Release
    if: startsWith(github.ref, 'refs/tags/v')
    runs-on: ubuntu-latest
    permissions:
      contents: write

    steps:
      - name: Checkout repository
        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
        with:
          fetch-depth: 0
        
      - name: Set up Go
        uses: actions/setup-go@41dfa10bad2bb2ae585af6ee5bb4d7d973ad74ed # v5.1.0
        with:
          go-version: 'stable'

      - name: Run GoReleaser
        uses: goreleaser/goreleaser-action@286f3b13b1b49da4ac219696163fb8c1c93e1200 # v6.0.0
        with:
          distribution: goreleaser
          version: latest
          args: release --clean
        env:
          GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
  
  deploy-demo:
    name: Deploy Demo to Cloud Run
    runs-on: ubuntu-latest
    environment: demo
    needs: docker
    permissions:
      id-token: write

    steps:
      - name: Authenticate with Google Cloud
        uses: google-github-actions/auth@6fc4af4b145ae7821d527454aa9bd537d1f2dc5f # v2.1.7
        with:
          credentials_json: ${{ secrets.GCP_SA_KEY }}

      - name: Set up Cloud SDK
        uses: google-github-actions/setup-gcloud@f0990588f1e5b5af6827153b93673613abdc6ec7 #v2.1.1

      - name: Deploy to Cloud Run
        run: |
          gcloud run deploy opds-proxy-demo \
            --image=evanbuss/opds-proxy:edge \
            --platform=managed \
            --region=us-central1 \
            --allow-unauthenticated