docker-build.yml

name: Build and Push Multi-Arch Docker Image

on:
  workflow_dispatch:
  pull_request:
  push:
    branches:
      - main

jobs:
  build-and-push:
    runs-on: ubuntu-latest

    permissions:
      contents: read
      packages: write

    steps:
      - name: Checkout source
        uses: actions/checkout@v4

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3
        with:
          platforms: all

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

      - name: Log in to Docker Hub
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}

      - name: Log in to GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GH_PAT }}

      - name: Build and Push to Docker Hub and GHCR
        uses: docker/build-push-action@v5
        with:
          context: .
          push: true
          platforms: linux/amd64,linux/arm64
          tags: |
            ${{ secrets.DOCKER_USERNAME }}/net-utils:latest
            ghcr.io/${{ github.repository_owner }}/net-utils:latest

      - name: Delete untagged images from GHCR
        if: github.event_name == 'push' && github.ref == 'refs/heads/main'
        env:
          GH_TOKEN: ${{ secrets.GH_PAT }}
          PACKAGE_NAME: net-utils
          OWNER: ${{ github.repository_owner }}
        run: |
          set -euo pipefail

          function check_package() {
            local path="$1"
            if gh api -H "Accept: application/vnd.github+json" "$path" >/dev/null 2>&1; then
              echo "$path"
              return 0
            fi
            return 1
          }

          PACKAGE_API=""
          if PACKAGE_API=$(check_package "/orgs/${OWNER}/packages/container/${PACKAGE_NAME}" 2>/dev/null); then
            :
          elif PACKAGE_API=$(check_package "/users/${OWNER}/packages/container/${PACKAGE_NAME}" 2>/dev/null); then
            :
          else
            echo "Package not found in org or user scope, skipping cleanup."
            exit 0
          fi

          echo "Cleaning untagged versions for package: ${PACKAGE_API}"
          gh api -H "Accept: application/vnd.github+json" "${PACKAGE_API}/versions?per_page=100" --paginate --jq '.[] | select(.metadata.container.tags | length == 0) | .id' | while read -r version_id; do
            if [[ -n "$version_id" ]]; then
              echo "Deleting untagged version ${version_id}"
              gh api -X DELETE -H "Accept: application/vnd.github+json" "${PACKAGE_API}/versions/${version_id}"
            fi
          done