build-docker.yml

name: container-images

on:
  push:
    branches: [ "main" ]
    tags: [ "v*" ]

jobs:
  build-container-image:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
    steps:
    - uses: actions/checkout@v4
      with:
        fetch-depth: 0
    - uses: docker/setup-qemu-action@v3
    - uses: docker/setup-buildx-action@v3

    - run: echo "IMAGE_TAG=latest" >> $GITHUB_ENV
      if: github.ref_name == 'main'
    - run: echo "IMAGE_TAG=${GITHUB_REF##*/}" >> $GITHUB_ENV
      if: startsWith(github.ref, 'refs/tags/v')

    - name: Login to ghcr.io
      uses: docker/login-action@v3
      with:
        registry: ghcr.io
        username: ${{ github.actor }}
        password: ${{ secrets.GITHUB_TOKEN }}

    - name: set lower case repository
      run: |
        echo "REPOSITORY_LC=${REPOSITORY,,}" >>${GITHUB_ENV}
      env:
        REPOSITORY: '${{ github.repository }}'

    - name: Build and push default image
      uses: docker/build-push-action@v5
      with:
        context: go-client # Because GH actions are for kids and put protection on everything; https://stackoverflow.com/a/71159809/11276254
        file: go-client/Dockerfile
        platforms: linux/amd64,linux/arm64
        push: true
        tags: |
          ghcr.io/${{ env.REPOSITORY_LC }}/go-client:${{ env.IMAGE_TAG }}