name: rust-compiler-publish

on:
  push:
    # Publish `main` as Docker `latest` image.
    branches:
      - main

    # Publish `v1.2.3` tags as releases.
    tags:
      - v*

env:
  IMAGE_NAME: cactus-rust-compiler

jobs:
  # Push image to GitHub Packages.
  # See also https://docs.docker.com/docker-hub/builds/
  build-tag-push-container:
    runs-on: ubuntu-20.04
    env:
      DOCKER_BUILDKIT: 1
      DOCKERFILE_PATH: ./tools/docker/rust-compiler/Dockerfile
      DOCKER_BUILD_DIR: ./tools/docker/rust-compiler/
    permissions:
      packages: write
      contents: read

    steps:
      - uses: actions/checkout@v3.1.0

      - name: Build image
        run: docker build $DOCKER_BUILD_DIR --file $DOCKERFILE_PATH --tag $IMAGE_NAME --label "runnumber=${GITHUB_RUN_ID}"

      - name: Log in to registry
        # This is where you will update the PAT to GITHUB_TOKEN
        run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u ${{ github.actor }} --password-stdin

      - name: Push image
        run: |
          SHORTHASH=$(git rev-parse --short "$GITHUB_SHA")
          TODAYS_DATE="$(date +%F)"
          DOCKER_TAG="$TODAYS_DATE-$SHORTHASH"
          IMAGE_ID=ghcr.io/${{ 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 $VERSION | sed -e 's/^v//')
          # Do not use the `latest` tag at all, tag with date + git short hash if there is no git tag
          [ "$VERSION" == "main" ] && VERSION=$DOCKER_TAG
          echo IMAGE_ID=$IMAGE_ID
          echo VERSION=$VERSION
          docker tag $IMAGE_NAME $IMAGE_ID:$VERSION
          docker push $IMAGE_ID:$VERSION