build.yml

name: Build & Push Docker Image

on:
  push:
    branches: [main, master]
    tags:
      - 'v*.*.*'
  workflow_dispatch:

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository_owner }}/zaps-backend

jobs:
  build:
    name: Build Docker Image
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write

    outputs:
      image_tag: ${{ steps.meta.outputs.tags }}
      image_digest: ${{ steps.build-push.outputs.digest }}
      short_sha: ${{ steps.vars.outputs.short_sha }}

    steps:
      - uses: actions/checkout@v4

      - name: Set short SHA
        id: vars
        run: echo "short_sha=$(git rev-parse --short HEAD)" >> $GITHUB_OUTPUT

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

      - name: Log in to GHCR
        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 }}
          tags: |
            type=ref,event=branch
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=sha,prefix=sha-,format=short
            type=raw,value=latest,enable=${{ github.ref == 'refs/heads/main' || github.ref == 'refs/heads/master' }}

      - name: Build and push
        id: build-push
        uses: docker/build-push-action@v5
        with:
          context: ./backend
          file: ./backend/Dockerfile
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max
          build-args: |
            BUILD_DATE=${{ github.event.head_commit.timestamp }}
            VCS_REF=${{ github.sha }}

      - name: Image digest
        run: echo "Pushed image digest ${{ steps.build-push.outputs.digest }}"