build-mysqld-exporter-container.yaml

name: "Build mysqld exporter container"

on:
  pull_request:
    paths:
      - "containers/mysqld_exporter/**"
      - ".github/workflows/build-mysqld-exporter-container.yaml"
      - "!**.md"
  push:
    branches:
      - 'main'
    paths:
      - "containers/mysqld_exporter/**"
      - ".github/workflows/build-mysqld-exporter-container.yaml"
      - "!**.md"

jobs:
  build:
    runs-on: ${{ vars.IMAGE_BUILD_RUNNER || 'ubuntu-22.04' }}
    steps:
      - uses: actions/checkout@v4
      - uses: docker/setup-qemu-action@v3
      - uses: docker/setup-buildx-action@v3
      - name: Login to GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Check TAG file
        working-directory: containers
        run: |
          result="$(./tag_exists moco/mysqld_exporter mysqld_exporter)"
          if [ "$result" = ok ]; then
            exit 0
          fi
          echo "TAG=$(cat ./mysqld_exporter/TAG)" >> $GITHUB_ENV

      - uses: docker/build-push-action@v5
        if: env.TAG != null
        with:
          context: containers/mysqld_exporter/.
          platforms: linux/amd64,linux/arm64
          push: ${{ github.ref == 'refs/heads/main' }}
          tags:  ghcr.io/cybozu-go/moco/mysqld_exporter:${{ env.TAG }}
          cache-from: type=gha
          cache-to: type=gha,mode=max