build-and-publish.yml

name: Build and Publish

on:
  # run it on push to the default repository branch
  push:
    branches:
      - main
      - dev
  tags:
    - '*'

jobs:
  # define job to build and publish docker image
  build-and-push-docker-image:
    name: Build Docker image and push to repositories
    # run only when code is compiling and tests are passing
    runs-on: ubuntu-latest

    # steps to perform in job
    steps:
      # setup Docker build action
      - name: Set up Docker Buildx
        id: buildx
        uses: docker/setup-buildx-action@v2

      - name: Login to Github Packages
        uses: docker/login-action@v2
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      
      - name: Determine Docker Image Tag
        id: image_tag
        run: |
          if [[ "${{ github.ref }}" == "refs/heads/main" ]]; then
            echo "tag=latest" >> $GITHUB_ENV
          elif [[ "${{ github.ref }}" == "refs/heads/dev" ]]; then
            COMMIT_HASH=$(git rev-parse --short HEAD)
            echo "tag=dev-${COMMIT_HASH}" >> $GITHUB_ENV
          elif [[ "${{ github.ref }}" == refs/tags/* ]]; then
            TAG_NAME=${GITHUB_REF#refs/tags/}
            echo "tag=${TAG_NAME}" >> $GITHUB_ENV
          fi

      - name: Build image and push to Docker Hub and GitHub Container Registry
        uses: docker/build-push-action@v2
        with:
          platforms: linux/amd64,linux/arm64
          tags: ghcr.io/damsien/syngit:${{ env.tag }}
          push: ${{ github.ref == 'refs/heads/dev' || github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/tags/') }}

      - name: Image digest
        run: echo ${{ steps.docker_build.outputs.digest }}