docker.yml

name: Docker build

on:
  workflow_dispatch:
  push:
    branches: [ "master", "main", "maint/*", "gha-docker-build" ]
    tags: "*"
  pull_request:
    branches: [ "master", "main", "maint/*" ]

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

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

jobs:
  build-container:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 200
          fetch-tags: true

      - name: Setup Docker buildx
        uses: docker/setup-buildx-action@v3

      - name: Log into registry ${{ env.REGISTRY }}
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract Docker metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}

      - name: Build and push Docker image
        uses: docker/build-push-action@v6
        with:
          context: .
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: |
            type=registry,ref=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:master
            type=registry,ref=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ env.TARGET_BRANCH }}
            type=registry,ref=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.meta.outputs.tags[0] }}
          cache-to: type=inline
        env:
          TARGET_BRANCH: ${{ github.base_ref || github.ref_name }}