# Adapted from
# https://github.com/actions/starter-workflows/ci/docker-publish.yml
# If using base images, don't forget to add READ access, eg. from a package settings page like:
# https://github.com/orgs/storytold/packages/container/docker-base-images-rust-ssl/settings/actions_access
name: "Build GHCR Rust Docker artifact"
on:
  push:
    branches:
      # NB: Default-branch doesn't work, despite Github's documentation.
      #- $default-branch
      - main
env:
  IMAGE_NAME: studio-headless

jobs:
  # Push image to GitHub Packages.
  # See also https://docs.docker.com/docker-hub/builds/
  # See also https://depot.dev/blog/docker-layer-caching-in-github-actions
  # See also https://evilmartians.com/chronicles/build-images-on-github-actions-with-docker-layer-caching
  build-docker-image:
    name: "Build Docker Image"
    #runs-on: ubuntu-22.04 # runs-on: ubuntu-latest
    #runs-on: github-ubuntu-16core # NB: Premium GitHub runner with more cores
    runs-on: github-ubuntu-64core # NB: Premium GitHub runner with more cores
    if: github.event_name == 'push'
    permissions:
      packages: write
      contents: read

    steps:
      - uses: actions/checkout@v3

      # - uses: docker/setup-buildx-action@v1
      #   name: Set up Docker Buildx

      - uses: docker/login-action@v1
        name: Login to GitHub Container Registry
        with:
          registry: ghcr.io
          username: ${{ github.actor }} # username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Calculate short SHA
        id: vars
        # echo "sha_short=$(git rev-parse --short HEAD)" >> $GITHUB_OUTPUT
        run: |
          echo "sha_short=$(echo ${{ github.sha }} | cut -c1-12)" >> $GITHUB_OUTPUT

      - name: Emit short SHA
        run: |
          echo "Full SHA: ${{ github.sha }}"
          echo "Short SHA: ${{ steps.vars.outputs.sha_short }}"

      #- uses: actions/cache@v2
      #  name: Cache Docker layers
      #  with:
      #    path: /tmp/.buildx-cache
      #    key: ${{ runner.os }}-buildx-${{ github.sha }}
      #    restore-keys: |
      #      ${{ runner.os }}-buildx-

      # Docs for this action are at https://github.com/marketplace/actions/build-docker-images-using-cache
      - uses: whoan/docker-build-with-cache-action@v6
        with:
          registry: ghcr.io
          username: ${{ github.actor }} # username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}
          image_name: storytold/storyteller-bevy
          dockerfile: Dockerfile
          # NB: The `git_push_tag: true` option does not work as expected, so we put the sha in `image_tag`:
          # https://github.com/whoan/docker-build-with-cache-action/issues/72
          image_tag: latest,${{ github.sha }},${{ steps.vars.outputs.sha_short }}
          # NB: Inject the Git SHA into the container so the servers can emit their own version:
          build_extra_args: "--build-arg=GIT_SHA=${{ github.sha }}"

      # - name: Build image
      #   run: |
      #     SHORT_SHA=$(echo ${GITHUB_SHA} | cut -c1-12)
      #     docker build . --file Dockerfile --tag $IMAGE_NAME --label "runnumber=${GITHUB_RUN_ID}" --build-arg GIT_SHA=${SHORT_SHA}

      # - 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
      #     [ "$VERSION" == "$default-branch" ] && VERSION=latest

      #     echo IMAGE_ID=$IMAGE_ID
      #     echo VERSION=$VERSION

      #     docker tag $IMAGE_NAME $IMAGE_ID:$VERSION
      #     docker push $IMAGE_ID:$VERSION

      #     SHORT_SHA=$(echo ${GITHUB_SHA} | cut -c1-12)

      #     docker tag $IMAGE_NAME $IMAGE_ID:$SHORT_SHA
      #     docker push $IMAGE_ID:$SHORT_SHA

      - name: Cleanup / Debug
        # This job will run even on failures to help with debugging.
        if: always()
        run: |
          echo "Report at final github action step:"
          echo "Disk usage:"
          pwd
          du -hsc * | sort -hr