docker-publish.yml

name: Docker

on:
  push:
    branches: [ develop, main ]
    tags:
      - v*
    paths-ignore:
        - '**/README.md'
  pull_request:

env:
  IMAGE_NAME: polyglot-code-server
  SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}

jobs:
  test:
    if: github.ref_name == 'develop'
    runs-on: ubuntu-latest
    steps:
      - uses: act10ns/slack@v1
        if: always()
        with:
          status: Building
          channel: '#github'
      
      - uses: actions/checkout@v2
      
      - name: Log into GitHub Container Registry
        run: echo "${{ secrets.CR_PAT }}" | docker login https://ghcr.io -u ${{ github.actor }} --password-stdin

      - name: Run tests
        if: always()
        run: |
          docker build . --file Dockerfile

  publish:
    if: github.ref_name == 'main'
    runs-on: ubuntu-latest
    steps:
      - uses: act10ns/slack@v1
        with:
          status: Pushing image
          channel: '#github'
        if: always()
      - uses: actions/checkout@v2

      - name: Log into GitHub Container Registry
        run: echo "${{ secrets.CR_PAT }}" | docker login https://ghcr.io -u ${{ github.actor }} --password-stdin

      - name: Build image
        run: docker build . --file Dockerfile --tag $IMAGE_NAME

      - name: Push image to GitHub Container Registry
        run: |
          IMAGE_ID=ghcr.io/${{ github.repository_owner }}/$IMAGE_NAME

          # 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

          docker tag $IMAGE_NAME $IMAGE_ID:$VERSION
          docker push $IMAGE_ID:$VERSION
      - uses: act10ns/slack@v1
        with:
          status: ${{ job.status }}
          steps: ${{ toJson(steps) }}
          channel: '#github'
        if: always()