cobalt/.github/workflows/docker.yml

name: Build Docker image

on:
  workflow_dispatch:

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

jobs:
  build-and-push-image:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3
        
      - name: Log in to the Container registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Get release metadata
        id: release-meta
        run: |
            version=$(cat package.json | jq -r .version)
            echo "commit_short=$(git rev-parse --short HEAD)" >> $GITHUB_OUTPUT
            echo "version=$version" >> $GITHUB_OUTPUT
            echo "major_version=$(echo "$version" | cut -d. -f1)" >> $GITHUB_OUTPUT
      - name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@v5
        with:
          tags: |
            type=raw,value=latest
            type=raw,value=${{ steps.release-meta.outputs.version }}
            type=raw,value=${{ steps.release-meta.outputs.major_version }}
            type=raw,value=${{ steps.release-meta.outputs.version }}-${{ steps.release-meta.outputs.commit_short }}
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}

      - name: Build and push Docker image
        uses: docker/build-push-action@v6
        with:
          context: .
          platforms: linux/amd64
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max