2-pre-release.yaml

name: 2-Publish container image to GitHub Packages

on:
  push:
    branches:
      - dev
  workflow_dispatch:

env:
  REGISTRY: ghcr.io
  PACKAGE_NAME: carbon-aware-sdk
  IMAGE_NAME: ${{ github.repository }}
  NUM_KEEP_IMAGES: 3

concurrency:
  group: publish
  cancel-in-progress: true

jobs:
  publish-container-image:
    if: github.repository == 'Green-Software-Foundation/carbon-aware-sdk' || vars.ENABLE_PRERELEASE_WORKFLOW == 'true'
    runs-on: ubuntu-latest
    permissions:
      packages: write
    steps:
      - name: Set up QEMU
        uses: docker/setup-qemu-action@v2
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v2
      - name: Log in to the Container registry
        uses: docker/login-action@v2.1.0
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ github.token }}
      - name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@v4.3.0
        with:
          tags: |
            type=raw,value=pre
            type=sha
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
      - name: Build and push Docker image
        uses: docker/build-push-action@v4.0.0
        with:
          context: "{{defaultContext}}:src"
          file: CarbonAware.WebApi/src/Dockerfile
          platforms: linux/amd64,linux/arm64
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          provenance: false
      - name: List older container images to remove
        id: list-older-images
        run: |
          $image_lower = "${{ env.IMAGE_NAME }}".ToLower()

          # Retrieve information of all of container images
          $versions = gh api orgs/${{ github.repository_owner }}/packages/container/${{ env.PACKAGE_NAME }}/versions | ConvertFrom-Json

          $digests = New-Object System.Collections.Generic.HashSet[string]
          # Pick up digest of tagged images which should be removed
          $versions |
              Where-Object {$_.metadata.container.tags.Where({$_.StartsWith("sha-")}, "First").Count -gt 0} |
              Sort-Object -Property created_at -Descending |
              Select-Object -Skip ${{ env.NUM_KEEP_IMAGES }} |
              ForEach-Object {[void]$digests.add($_.name)}

          # Pick up digest of children tagged images which should be removed
          $loop_set = New-Object System.Collections.Generic.HashSet[string]($digests)
          $loop_set.foreach{
            docker manifest inspect "${{ env.REGISTRY }}/$image_lower@$_" |
            Out-String |
            ConvertFrom-Json |
            Select-Object -ExpandProperty "manifests" |
            ForEach-Object {[void]$digests.Add($_.digest)}
          }

          # Retrieve IDs to be removed
          $ids = $versions |
              Where-Object {$digests.Contains($_.name)} |
              Select-Object -ExpandProperty id

          $remove_images = $ids -join ","
          "REMOVE_IMAGES=$remove_images" >> $env:GITHUB_OUTPUT
        env:
          GH_TOKEN: ${{ github.token }}
        shell: pwsh
      - name: Remove stale packages
        uses: actions/delete-package-versions@v4
        with:
          package-name: carbon-aware-sdk
          package-type: container
          package-version-ids: ${{ steps.list-older-images.outputs.REMOVE_IMAGES }}