build.yml

name: Build

on:
  workflow_call:
    inputs:
      GO_VERSION:
        required: true
        type: string
      REGISTRY:
        required: true
        type: string
      NAMESPACE:
        required: true
        type: string
      TAG:
        required: true
        type: string
      MAJOR_TAG:
        required: false
        type: string
      MINOR_TAG:
        required: false
        type: string
      PATCH_TAG:
        required: false
        type: string
      PLATFORMS:
        required: false
        type: string
  workflow_dispatch:
    inputs:
      GO_VERSION:
        description: Go version to use
        required: true
        type: string
        default: 1.22.4
      REGISTRY:
        description: Target registry to push images
        required: true
        type: string
        default: ghcr.io
      NAMESPACE:
        description: Target namespace to the given registry
        required: true
        type: string
        default: titigmr/external-dns-midaas-webhook
      PLATFORMS:
        description: Target platforms for build
        required: false
        type: string
        default: linux/amd64,linux/arm64

permissions:
  packages: write
  contents: write
  
jobs:
  vars:
    name: Generate variables
    runs-on: ubuntu-latest
    outputs:
      short-sha: ${{ steps.infos.outputs.SHORT_SHA }}
      platforms-json: ${{ steps.infos.outputs.PLATFORMS_JSON }}
    steps:
      - name: Checks-out repository
        uses: actions/checkout@v4

      - name: Get variables
        id: infos
        run: |
          echo "SHORT_SHA=sha-$(git rev-parse --short HEAD)" >> $GITHUB_OUTPUT
          echo "PLATFORMS_JSON=$(echo '"${{ inputs.PLATFORMS }}"' | jq -c 'split(",")')" >> $GITHUB_OUTPUT

  build-binaries:
    name: Build application binaries
    runs-on: ubuntu-latest
    needs:
      - vars
    strategy:
      matrix:
        platforms: ${{ fromJson(needs.vars.outputs.platforms-json) }}
    steps:
      - name: Checks-out repository
        uses: actions/checkout@v4

      - name: Setup Go
        uses: actions/setup-go@v5
        with:
          go-version: ${{ inputs.GO_VERSION }}

      - name: Install dependencies
        run: go mod download

      - name: Run vet command
        run: go vet .

      - name: Run build
        run: |
          export BUILD_OS="$(echo ${{ matrix.platforms }} | cut -d '/' -f 1)"
          export BUILD_ARCH="$(echo ${{ matrix.platforms }} | cut -d '/' -f 2,3)"

          echo "BUILD_OS=$BUILD_OS" >> $GITHUB_ENV
          echo "BUILD_ARCH=$BUILD_ARCH" >> $GITHUB_ENV

          CGO_ENABLED=0 GOOS=${BUILD_OS} GOARCH=${BUILD_ARCH} \
            go build -o ./binaries/external-dns-midaas-webhook_${BUILD_OS}-${BUILD_ARCH} .

      - name: Upload build results
        uses: actions/upload-artifact@v4
        with:
          name: external-dns-midaas-webhook_${{ env.BUILD_OS }}-${{ env.BUILD_ARCH }}
          path: ./binaries/external-dns-midaas-webhook_${{ env.BUILD_OS }}-${{ env.BUILD_ARCH }}

  build-docker:
    name: Build application image
    runs-on: ubuntu-latest
    needs:
      - vars
    steps:
      - name: Checks-out repository
        uses: actions/checkout@v4

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

      - name: Set up QEMU (for multi platform build)
        uses: docker/setup-qemu-action@v3

      - name: Login to GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ${{ inputs.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
          logout: true

      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ inputs.REGISTRY }}/${{ inputs.NAMESPACE }}
          tags: |
            type=raw,value=${{ needs.vars.outputs.short-sha }},enable=${{ inputs.TAG == '' }}
            type=raw,value=${{ inputs.TAG }},enable=${{ inputs.TAG != '' }}
            type=raw,value=${{ inputs.MAJOR_TAG }}.${{ inputs.MINOR_TAG }},enable=${{ inputs.MAJOR_TAG != '' && inputs.MINOR_TAG != '' }}
            type=raw,value=${{ inputs.MAJOR_TAG }},enable=${{ inputs.MAJOR_TAG != '' }}
            type=raw,value=latest,enable=${{ github.ref == format('refs/heads/{0}', 'main') }}

      - name: Build and push docker image
        id: build
        uses: docker/build-push-action@v5
        with:
          context: .
          file: ./Dockerfile
          target: prod
          provenance: false
          platforms: ${{ inputs.PLATFORMS }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          push: true
          cache-from: type=gha
          cache-to: type=gha,mode=max