name: Build and push to registry

on:
  push:
    branches: [ "main", "dev" ]
    tags: [ "v*.*.*" ]
  pull_request:
    branches: [ "main", "dev" ]
  workflow_dispatch:

permissions:
  packages: write
  contents: read
      
jobs:
  build-and-push:
    name: Build Docker image and push to registry
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v3

      - name: Set up Docker buildx
        id: buildx
        uses: docker/setup-buildx-action@v2

      - name: Login to GitHub's container registry
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v2
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - uses: Entepotenz/change-string-case-action@v1 # https://github.com/orgs/community/discussions/10553
        id: repo-uri-string
        with:
          string: ghcr.io/${{ github.repository }}

      - name: Generate image metadata
        id: docker-meta # used in next step
        uses: docker/metadata-action@v5
        with:
          # list of Docker images to use as base name for tags
          images: ${{ steps.repo-uri-string.outputs.lowercase }}
          # Docker tags based on the following events/attributes
          tags: |
            type=raw,value=latest,enable={{is_default_branch}}
            type=ref,event=branch
            type=ref,event=pr
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=semver,pattern={{major}}
            type=sha

      - name: Build image and push to registry
        uses: docker/build-push-action@v5
        with:
          context: .
          platforms: linux/amd64,linux/arm64
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.docker-meta.outputs.tags }}
          labels: ${{ steps.docker-meta.outputs.labels }}
          # Some basic caching of the layers...
          cache-from: ${{ steps.repo-uri-string.outputs.lowercase }}:latest-cache
          cache-to: ${{ steps.repo-uri-string.outputs.lowercase }}:latest-cache