build.yaml

name: Container Images
on:
  push:
    branches:
      - main
  pull_request:
  release:
    types: [published]

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}

jobs:
  build:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
      attestations: write
      id-token: write

    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=raw,value=latest,enable=${{ github.ref == 'refs/heads/main' }}
            type=ref,event=tag
            type=raw,value=stable,enable=${{ startsWith(github.ref, 'refs/tags/') }}
            type=ref,event=pr

      - name: Show tags
        continue-on-error: true
        run: |
          echo "Tags generated by metadata-action:\n"
          for tag in ${{ steps.metadata.output.tags }}; do
            echo $tag
          done

      - name: Extract version from tag
        if: startsWith(github.ref, 'refs/tags/')
        run: echo "VERSION=${GITHUB_REF##*/}" >> $GITHUB_ENV

      - name: Log into GitHub Container Registry
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v2
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Build and push slim
        uses: docker/build-push-action@v4
        with:
          context: .
          file: ./Dockerfile.slim
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}-slim
          labels: ${{ steps.meta.outputs.labels }}
          build-args: |
            BUILD_DATE=${{ github.event.repository.updated_at }}
            VCS_REF=${{ github.sha }}
            VERSION=${{ env.VERSION }}

      - name: Build and push
        uses: docker/build-push-action@v4
        with:
          context: .
          file: ./Dockerfile
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          build-args: |
            SLIM_IMAGE=${{ steps.meta.outputs.tags }}-slim

      - name: Fetch all tags and store them
        run: |
          # List all tags
          tags=$(git tag -l)
          echo "All tags:"
          echo "$tags"

          # Save tags in an environment variable for later use
          echo "ALL_TAGS=$(echo $tags | tr '\n' ' ')" >> $GITHUB_ENV

      - name: Retain last two minor versions
        run: |
          # Fetch all tags in the format X.Y.Z
          echo "Using stored tags..."
          all_tags="${{ env.ALL_TAGS }}"
          echo "All tags:"
          echo "$all_tags"

          # Extract the minor versions (X.Y) from tags in the format vX.X.X
          latest_two_minors=$(echo "$all_tags" | tr ' ' '\n' | grep -E '^v[0-9]+\.[0-9]+\.[0-9]+$' | sed -E 's/^v([0-9]+\.[0-9]+)\.[0-9]+$/\1/' | uniq | tail -n 2)
          echo "Last two minor versions:"
          echo "$latest_two_minors"

          keep_tags=""
          for minor in $latest_two_minors; do
            echo "Processing minor version: $minor"
            patches=$(echo "$all_tags" | tr ' ' '\n' | grep "^v$minor\.")
            echo "Latest patch for $minor: $patches"
            keep_tags="$keep_tags $patches"
          done

          # Store the tags in the environment variable
          keep_tags=$(echo $keep_tags | tr ' ' '\n' | paste -sd ',' -)
          echo "Tags to keep: $keep_tags"
          echo "keep_tags=$keep_tags" >> $GITHUB_ENV
          echo "keep_tags=$keep_tags"

      - name: Run container retention policy
        if: github.ref == 'refs/heads/main'
        uses: snok/container-retention-policy@v3.0.0
        with:
          account: ApeWorX
          token: ${{ secrets.GITHUB_TOKEN }}
          image-tags: "!stable* !latest* !${{ env.keep_tags }}"
          tag-selection: both
          cut-off: 4w
          dry-run: true