name: php-fpm-build

on:
  push:
    branches: [main]
    paths:
      - "php-fpm/**"
      - "shared/php-fpm/**"
      - ".github/workflows/php-fpm.yml"
  pull_request:
    branches: [main]
    paths:
      - "php-fpm/**"
      - "shared/php-fpm/**"
      - ".github/workflows/php-fpm.yml"
  workflow_dispatch:
    inputs:
      lane:
        description: 'Lane to build (e.g. 7.4). Use "all" to build all lanes. Leave blank to build based on changes.'
        required: false
        default: ""

jobs:
  lanes:
    runs-on: ubuntu-latest
    outputs:
      matrix: ${{ steps.set-matrix.outputs.result }}
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Get changed files
        id: changed-files
        uses: tj-actions/changed-files@v44
        with:
          files: |
            php-fpm/**
            shared/php-fpm/**
            .github/workflows/php-fpm.yml

      - name: Get all PHP lanes
        id: get-lanes
        run: |
          echo "lanes=$(find php-fpm -mindepth 1 -maxdepth 1 -type d -exec basename {} \; | jq -c -R . | jq -c -s .)" >> $GITHUB_OUTPUT
        shell: bash

      - name: Get changed PHP lanes
        id: changed-lanes
        run: |
          changed_lanes=$(echo "${{ steps.changed-files.outputs.all_changed_files }}" | tr ' ' '\n' | grep '^php-fpm/' || true | cut -d'/' -f2 | sort -u | jq -c -R . | jq -c -s .)
          echo "lanes=${changed_lanes:-[]}" >> $GITHUB_OUTPUT
        shell: bash

      - name: Check for changes requiring all lanes to be built
        id: build-all-check
        run: |
          if echo "${{ steps.changed-files.outputs.all_changed_files }}" | tr ' ' '\n' | grep -q -e '^\.github/workflows/' -e '^shared/php-fpm/'; then
            echo "build_all=true"
          else
            echo "build_all=false"
          fi >> $GITHUB_OUTPUT
        shell: bash

      - name: Generate matrix for build job
        id: set-matrix
        uses: actions/github-script@v7
        with:
          result-encoding: json
          script: |
            const req_lane = "${{ github.event.inputs.lane }}";
            const build_all = ${{ steps.build-all-check.outputs.build_all == 'true' }};
            const all_lanes = JSON.parse('${{ steps.get-lanes.outputs.lanes }}' || '[]');
            const changed_lanes = JSON.parse('${{ steps.changed-lanes.outputs.lanes }}' || '[]');

            let lanes_to_build = [];

            if (req_lane) {
              if (req_lane === "all") {
                lanes_to_build = all_lanes;
              } else {
                lanes_to_build = [req_lane];
              }
            } else if (build_all) {
              lanes_to_build = all_lanes;
            } else {
              lanes_to_build = changed_lanes;
            }

            return { lane: lanes_to_build };

  build:
    needs: lanes
    if: ${{ needs.lanes.outputs.matrix != '' && needs.lanes.outputs.matrix.lane[0] }}
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix: ${{ fromJson(needs.lanes.outputs.matrix) }}
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

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

      - name: Log in to the Container Registry
        uses: docker/login-action@v3
        with:
          registry: gitea.auvem.com
          username: ${{ vars.REGISTRY_USER || github.actor }}
          password: ${{ secrets.REGISTRY_TOKEN }}

      - name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: gitea.auvem.com/auvem/wordpress-docker/php-fpm
          tags: |
            type=raw,value={{matrix.lane}}-stable
            type=raw,value={{matrix.lane}}-{{sha}}

      - name: Build and push Docker image
        uses: docker/build-push-action@v6
        with:
          context: .
          file: ./php-fpm/${{ matrix.lane }}/Dockerfile
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          platforms: linux/amd64