name: CI
on:
  push:
    paths:
      - .github/workflows/build.yml
      - cmd/**
      - internal/**
      - pkg/**
      - .dockerignore
      - .golangci.yml
      - Dockerfile
      - go.mod
      - go.sum
  release:
    types: [published]
    paths:
      - .github/workflows/build.yml
      - cmd/**
      - internal/**
      - pkg/**
      - .dockerignore
      - .golangci.yml
      - Dockerfile
      - go.mod
      - go.sum

jobs:
  verify:
    runs-on: ubuntu-latest
    env:
      DOCKER_BUILDKIT: "1"
    steps:
      - uses: actions/checkout@v2

      - name: Linting
        run: docker build --target lint .

      - name: Go mod tidy check
        run: docker build --target tidy .

      - name: Build test image
        run: docker build --target test -t test-container .

      - name: Run tests in test container
        run: |
          touch coverage.txt
          docker run --rm \
          -v "$(pwd)/coverage.txt:/tmp/gobuild/coverage.txt" \
          test-container \
          go test \
          -race \
          -coverpkg=./... \
          -coverprofile=coverage.txt \
          -covermode=atomic \
          ./...

      # We run this here to use the caching of the previous steps
      - if: github.event_name == 'push'
        name: Build final image
        run: docker build .

  publish:
    if: github.event_name == 'release' ||
      github.event_name == 'push'
    needs: [verify]
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2

      - uses: docker/setup-qemu-action@v1
      - uses: docker/setup-buildx-action@v1

      - uses: docker/login-action@v1
        with:
          username: qmcgaw
          password: ${{ secrets.DOCKERHUB_PASSWORD }}

      - name: Set variables
        id: vars
        env:
          EVENT_NAME: ${{ github.event_name }}
        run: |
          BRANCH=${GITHUB_REF#refs/heads/}
          echo ::set-output name=commit::$(git rev-parse --short HEAD)
          echo ::set-output name=build_date::$(date -u +%Y-%m-%dT%H:%M:%SZ)
          echo ::set-output name=version::${GITHUB_REF#refs/heads/}
          if [ "$EVENT_NAME" = "push" ] && [ "$BRANCH" != "main" ]; then
            echo ::set-output name=version::$BRANCH
            echo ::set-output name=platforms::linux/amd64
          elif [ "$EVENT_NAME" = "push" ] && [ "$BRANCH" = "main" ]; then
            echo ::set-output name=version::latest
            echo ::set-output name=platforms::linux/amd64,linux/386,linux/arm64,linux/arm/v6,linux/arm/v7,linux/s390x,linux/ppc64le
          else
            echo ::set-output name=version::${GITHUB_REF#refs/tags/}
            echo ::set-output name=platforms::linux/amd64,linux/386,linux/arm64,linux/arm/v6,linux/arm/v7,linux/s390x,linux/ppc64le
          fi

      - name: Build and push final image
        uses: docker/build-push-action@v2
        with:
          platforms: ${{ steps.vars.outputs.platforms }}
          build-args: |
            BUILD_DATE=${{ steps.vars.outputs.build_date }}
            COMMIT=${{ steps.vars.outputs.commit }}
            VERSION=${{ steps.vars.outputs.version }}
          tags: |
            qmcgaw/gluetun:${{ steps.vars.outputs.version }}
            qmcgaw/private-internet-access:${{ steps.vars.outputs.version }}
          push: true

      - if: github.event_name == 'push' && github.event.ref == 'refs/heads/main'
        name: Microbadger hook
        run: curl -X POST https://hooks.microbadger.com/images/qmcgaw/gluetun/l-keGI7p4IhX4QuIDMFYKhsZ1L0=
        continue-on-error: true