# This workflow will publish a docker image for every full release to the GitHub package repository

name: Create Docker Image (Release and Staging)

on:
  release:
    # Allow pre-releases
    types: [published]
  schedule:
    # Build the staging image everyday at 00:00 UTC
    - cron: "0 0 * * *"
  push:
    # Temporary workaround
    branches:
      - release

env:
  # This should allow creation of docker images even in forked repositories
  REPO: ${{ github.repository }}
  REGISTRY: ghcr.io

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
      # Workaround for GitHub repo names containing uppercase characters
      - name: Set lowercase repo name
        run: |
          echo "IMAGE_NAME=${REPO,,}" >> ${GITHUB_ENV}

      # Using the following workaround because currently GitHub Actions 
      # does not support logical AND/OR operations on triggers
      # It's currently not possible to have `branches` under the `schedule` trigger
      - name: Checkout the release branch (on release)
        if: ${{ github.event_name == 'release' || github.event_name == 'push' }}
        uses: actions/checkout@v4.1.2
        with:
          ref: "release"

      - name: Checkout the staging branch
        if: ${{ github.event_name == 'schedule' }}
        uses: actions/checkout@v4.1.2
        with:
          ref: "staging"

      # Get current branch name
      # This is also part of the workaround for Actions not allowing logical
      # AND/OR operators on triggers
      # Otherwise the action triggered by schedule always has ref_name = release
      - name: Get the current branch name
        run: |
          echo "BRANCH_NAME=$(git rev-parse --abbrev-ref HEAD)" >> ${GITHUB_ENV}

      # Setting up QEMU for multi-arch image build
      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Extract metadata (tags, labels) for the image
        uses: docker/metadata-action@v5.5.1
        id: metadata
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: ${{ env.BRANCH_NAME }}

      # Login into package repository as the person who created the release
      - name: Log in to the Container registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      # Build docker image using dockerfile for amd64 and arm64
      # Tag it with branch name
      # Assumes branch name is the version number
      - name: Build and push
        uses: docker/build-push-action@v5.3.0
        with:
          context: .
          platforms: linux/amd64,linux/arm64
          file: Dockerfile
          push: true
          tags: ${{ steps.metadata.outputs.tags }}
          labels: ${{ steps.metadata.outputs.labels }}

      # If the workflow is triggered by a release, marks and push the image as such
      - name: Docker tag latest and push
        if: ${{ github.event_name == 'release' }}
        run: |
          docker tag $IMAGE_NAME:${{ github.ref_name }} $IMAGE_NAME:latest
          docker push $IMAGE_NAME:latest