build-and-publish-docker-hub-images.yml

name: Build and publish Docker Hub images

on:
  push:
    branches:
      - 'main'
      - '[0-9].x'
    tags:
      - '[0-9]+.[0-9]+'
      - '[0-9]+.[0-9]+.[0-9]+'
  pull_request:
    branches:
      - 'main'

jobs:
  docker:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Login to DockerHub
        uses: docker/login-action@v3
        with:
          username: ${{ vars.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_PASSWORD }}

      - name: Extract metadata (tags, labels) for standard image
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: computablefacts/towerify
          flavor: |
            latest=false
          tags: |
            # set latest tag only for default branch
            type=raw,value=latest,enable={{is_default_branch}}
            type=ref,event=branch
            type=pep440,pattern={{version}}
            type=pep440,pattern={{major}}.{{minor}}
            type=pep440,pattern={{major}}
            type=sha,prefix=sha-,format=short
            type=sha,prefix=sha-,format=long

      - name: Build and push image
        uses: docker/build-push-action@v5
        with:
          context: .
          file: ./towerify/Dockerfile
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=registry,ref=computablefacts/towerify:buildcache
          cache-to: type=registry,ref=computablefacts/towerify:buildcache,mode=max