build.yaml

name: Build Docker Image

on:
  push:
    branches:
      - main
  pull_request:

jobs:
  build:
    runs-on: ubuntu-20.04
    env:
      CI_DOCKER_IMAGE: orly
      CI_DOCKERFILE: Dockerfile
      CI_DOCKER_CONTEXT: .
      CI_EXTERNAL_NAME: kirinnee/orly

    steps:
      - name: Check out Code
        uses: actions/checkout@v2

      - name: Log into GitHub registry
        run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login docker.pkg.github.com -u ${{ github.actor }} --password-stdin

      - name: Generate image reference
        run: |
          IMAGE_ID=docker.pkg.github.com/${{ github.repository }}/$CI_DOCKER_IMAGE
          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: Cache Pull
        run: |
          docker pull $IMAGE_ID || true

      - name: Build image
        run: docker build $CI_DOCKER_CONTEXT -f $CI_DOCKERFILE --tag $CI_DOCKER_IMAGE --cache-from=$IMAGE_ID

      - name: Push image
        run: |
          IMAGE_REF=${{ env.IMAGE_ID }}:${{ env.VERSION }}
          echo Docker Image reference: $IMAGE_REF
          docker tag $CI_DOCKER_IMAGE $IMAGE_REF
          docker push $IMAGE_REF
      - name: Log into DockerHub registry
        run: echo "${{ secrets.DOCKER_TOKEN }}" | docker login -u ${{ secrets.DOCKER_USER }} --password-stdin
      - name: Push to DockerHub
        run: |
          DOCKERHUB_NAME=$CI_EXTERNAL_NAME:latest
          docker tag $CI_DOCKER_IMAGE $DOCKERHUB_NAME
          docker push $DOCKERHUB_NAME