build-and-push-docker-image.yml

name: Build and push docker image

on:
  workflow_dispatch:
  workflow_call:
  push:
    branches:
      - master

jobs:
  build_and_push_docker_image:
    runs-on: ubuntu-latest
    steps:
      - name: Check out code
        uses: actions/checkout@v3.3.0

      - name: Log in to Docker Hub
        uses: docker/login-action@v2
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

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

      - name: Determine tag
        id: determine_tag
        run: |
          base_image="ghcr.io/dfe-digital/buying-for-schools-v2"
          branch="${{ github.ref_name }}"
          commit="$(echo $GITHUB_SHA | head -c7)"

          if [ "$branch" == "master" ]; then
            echo tags=${base_image}:${commit},${base_image}:latest >> $GITHUB_OUTPUT
          else
            echo tags=${base_image}:${commit},${base_image}:${branch} >> $GITHUB_OUTPUT
          fi

      - name: Build and push
        uses: docker/build-push-action@v4
        with:
          context: .
          push: true
          tags: ${{ steps.determine_tag.outputs.tags }}