container-build.yml

name: Build & Push Container

on:
  workflow_dispatch:

permissions:
  contents: write
  packages: write

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}

jobs:
  merge-branches-with-no-ff:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout 🛎️
        uses: actions/checkout@v4

      - name: merge into test
        if: github.ref_name == 'test'
        uses: ./.github/workflows/actions/merge-ff-only
        with:
          target-ref: "test"
          base-ref: "main"

      - name: merge into production
        if: github.ref_name == 'production'
        uses: ./.github/workflows/actions/merge-ff-only
        with:
          target-ref: "production"
          base-ref: "test"

  container-prerequisites:
    runs-on: ubuntu-latest
    needs: merge-branches-with-no-ff

    outputs:
      version: ${{ steps.extract-version.outputs.version }}

    steps:
      - name: Checkout 🛎️
        uses: actions/checkout@v4

      - name: Get version tag of HEAD if any
        id: extract-version
        run: |
          git fetch --prune --tags
          echo "version=`git tag -l --points-at=HEAD | sed -En 's/^v(.*)/\1/p'`" >> $GITHUB_OUTPUT

  # If the current commit has no version tag, an image needs to be
  # built, tagged and pushed to the registry
  # If the build runs on test but test has already been built
  # with the latest tag, nothing happens
  container-build-and-push-image:
    runs-on: ubuntu-latest
    needs: container-prerequisites
    if: needs.container-prerequisites.outputs.version == ''

    steps:
      - name: Checkout 🛎️
        uses: actions/checkout@v4

      # Make sure we actually checkout the HEAD with the previously
      # merged commits from main, instead of the latest commit of the
      # release branch at the time this workflow has been started
      # (before merge)
      - name: Checkout latest commit
        run: |
          git fetch --prune --tags
          git checkout HEAD
          git log -n 1

      - name: Read .nvmrc
        run: echo "NODE_VERSION=$(cat .nvmrc)" >> $GITHUB_OUTPUT
        id: nvm

      - name: Use Node.js ${{ steps.nvm.outputs.NODE_VERSION }}
        uses: actions/setup-node@v4
        with:
          node-version: ${{ steps.nvm.outputs.NODE_VERSION }}
          cache: "npm"

      - name: Install dependencies 🔧
        run: npm ci

      - name: Build application 🏭
        run: |
          npm run build
          mv dist evento-portal
          mkdir dist
          mv evento-portal dist

      - name: Bump Git version tag and push it
        id: tag
        uses: anothrNick/github-tag-action@1.64.0
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          INITIAL_VERSION: 1.0.0
          WITH_V: true

      - name: Login to Docker registry
        uses: docker/login-action@v2
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Determine environment and version tags based on Git & Docker registry
        id: meta
        uses: docker/metadata-action@v4
        with:
          images: |
            ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=raw,value=${{ steps.tag.outputs.new_tag }}-${{ github.ref_name }}
            type=semver,pattern={{version}},value=${{ steps.tag.outputs.new_tag }}

      - name: Build and push Docker image
        uses: docker/build-push-action@v4
        with:
          context: .
          push: true
          tags: ${{ steps.meta.outputs.tags }}

  # If the current commit has a version tag, the existing image should
  # be reused by retagging and pushing it
  container-retag-and-push-image:
    runs-on: ubuntu-latest
    needs: container-prerequisites
    if: needs.container-prerequisites.outputs.version != ''

    steps:
      - name: Login to Docker registry
        uses: docker/login-action@v2
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Retag existing image & push
        env:
          VERSION_IMAGE: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ needs.container-prerequisites.outputs.version }}
          BRANCH_IMAGE: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ github.ref_name }}
          BRANCH_VERSION_IMAGE: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:v${{ needs.container-prerequisites.outputs.version }}-${{ github.ref_name }}
        run: |
          docker pull ${{ env.VERSION_IMAGE }}
          docker tag ${{ env.VERSION_IMAGE }} ${{ env.BRANCH_VERSION_IMAGE }}
          docker push ${{ env.BRANCH_VERSION_IMAGE }}