# Builds the net-snmp base image used by the agent Dockerfile.
# Only needs to run when the net-snmp version changes.
#
# Trigger manually or on changes to Dockerfile.netsnmp.

name: Build net-snmp base image

on:
  push:
    branches: [main]
    paths: [Dockerfile.netsnmp]
  workflow_dispatch:
    inputs:
      netsnmp_version:
        description: "Net-SNMP version to build"
        default: "5.9.5.2"
        required: true

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: towerops-app/netsnmp-alpine

jobs:
  build:
    name: Build (${{ matrix.arch }})
    runs-on: ${{ matrix.runner }}
    permissions:
      contents: read
      packages: write
    strategy:
      fail-fast: false
      matrix:
        include:
          - platform: linux/amd64
            arch: amd64
            runner: blacksmith-4vcpu-ubuntu-2404
          - platform: linux/arm64
            arch: arm64
            runner: blacksmith-4vcpu-ubuntu-2404-arm
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Setup Blacksmith Builder
        uses: useblacksmith/setup-docker-builder@v1

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

      - name: Build and push
        uses: useblacksmith/build-push-action@v2
        with:
          context: .
          file: Dockerfile.netsnmp
          platforms: ${{ matrix.platform }}
          push: true
          provenance: false
          build-args: |
            NETSNMP_VERSION=${{ inputs.netsnmp_version || '5.9.5.2' }}
          tags: |
            ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ inputs.netsnmp_version || '5.9.5.2' }}-${{ matrix.arch }}

  manifest:
    name: Create Manifest
    needs: build
    runs-on: blacksmith-4vcpu-ubuntu-2404
    permissions:
      contents: read
      packages: write
    steps:
      - name: Log in to GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Create multi-arch manifest
        run: |
          VERSION="${{ inputs.netsnmp_version || '5.9.5.2' }}"
          IMAGE="${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}"

          docker buildx imagetools create -t ${IMAGE}:${VERSION} \
            ${IMAGE}:${VERSION}-amd64 \
            ${IMAGE}:${VERSION}-arm64

          docker buildx imagetools create -t ${IMAGE}:latest \
            ${IMAGE}:${VERSION}-amd64 \
            ${IMAGE}:${VERSION}-arm64

      - name: Summary
        run: |
          echo "### net-snmp base image built" >> $GITHUB_STEP_SUMMARY
          echo "Version: ${{ inputs.netsnmp_version || '5.9.5.2' }}" >> $GITHUB_STEP_SUMMARY
          echo "Image: \`${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ inputs.netsnmp_version || '5.9.5.2' }}\`" >> $GITHUB_STEP_SUMMARY