docker-image.yml

name: Docker Image CI

on:
  push:
    branches: [ main ]
  #pull_request:
  #  branches: [ main ]

jobs:

  build:

    runs-on: ubuntu-latest

    steps:
      -
        name: Checkout
        uses: actions/checkout@v2
      -
        name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v1
      -
        name: Login to GitHub Container Registry
        uses: docker/login-action@v1
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          #password: ${{ secrets.REGISTRY_SECRET }}
          password: ${{ secrets.GITHUB_TOKEN }}
          #repository: byte-method/ddns-server
      - name: Tag
        run: |
          IMAGE_ID=ghcr.io/${{ github.repository_owner }}/ddns-server

          # Change all uppercase to lowercase
          IMAGE_ID=$(echo $IMAGE_ID | tr '[A-Z]' '[a-z]')
          # Strip git ref prefix from version
          VERSION=$(echo "${{ github.ref }}" | sed -e 's,.*/\(.*\),\1,')
          # Strip "v" prefix from tag name
          [[ "${{ github.ref }}" == "refs/tags/"* ]] && VERSION=$(echo $VERSION | sed -e 's/^v//')
          # Use Docker `latest` tag convention
          [ "$VERSION" == "main" ] && VERSION=latest
          echo IMAGE_ID=$IMAGE_ID
          echo VERSION=$VERSION
          echo "IMAGE_ID=${IMAGE_ID}" >> $GITHUB_ENV
          echo "VERSION=${VERSION}" >> $GITHUB_ENV
      -
        name: Build and push
        uses: docker/build-push-action@v2
        with:
          context: .
          push: true
          #tags: ghcr.io/byte-method/ddns-server:latest
          tags: "${{env.IMAGE_ID}}:${{env.VERSION}}"
          #cache-from: "type=registry,ref=${{ env.IMAGE_ID }}:latest"
          #cache-to: type=inline