name: Lint and Test Charts

on:
  push:
    branches: [master]
    tags:
      - 'v*'
  pull_request:

jobs:
  docker-build:
    runs-on: ubuntu-latest
    name: Building Docker Image
    steps:
      - name: Checkout
        uses: actions/checkout@v2

      - name: Docker meta
        id: docker_meta
        uses: crazy-max/ghaction-docker-meta@v1
        with:
          images: caddy/ingress
          tag-sha: true

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v1

      - name: Cache Docker layers
        uses: actions/cache@v2
        with:
          path: /tmp/.buildx-cache
          key: ${{ runner.os }}-buildx-${{ github.sha }}
          restore-keys: |
            ${{ runner.os }}-buildx-

      - name: Login to DockerHub
        uses: docker/login-action@v1
        with:
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}

      - name: Build and push
        id: docker_build
        uses: docker/build-push-action@v2
        with:
          push: true
          tags: ${{ steps.docker_meta.outputs.tags }}
          labels: ${{ steps.docker_meta.outputs.labels }}
          cache-from: type=local,src=/tmp/.buildx-cache
          cache-to: type=local,dest=/tmp/.buildx-cache

  lint-test:
    name: Test and lint charts
    needs:
      - docker-build
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v2
        with:
          fetch-depth: 0

      - name: Set up chart-testing
        uses: helm/chart-testing-action@v2.0.1

      - name: Run chart-testing (list-changed)
        id: list-changed
        run: |
          changed=$(ct list-changed)
          if [[ -n "$changed" ]]; then
            echo "::set-output name=changed::true"
          fi

      - name: Run chart-testing (lint)
        run: ct lint

      - name: Create kind cluster
        uses: helm/kind-action@v1.1.0
        with:
          version: "v0.9.0"
        # Only build a kind cluster if there are chart changes to test.
        if: steps.list-changed.outputs.changed == 'true'

      - name: Install MetalLB to allow LoadBalancer services
        if: steps.list-changed.outputs.changed == 'true'
        run: |
          kubectl create ns metallb-system
          kubectl apply -f https://raw.githubusercontent.com/google/metallb/v0.9.3/manifests/metallb.yaml
          cat <<EOF | kubectl apply -f -
          apiVersion: v1
          kind: ConfigMap
          metadata:
            name: config
            namespace: metallb-system
          data:
            config: |
              address-pools:
              - name: default
                protocol: layer2
                addresses:
                - 172.17.255.1-172.17.255.200
          EOF

      - name: Get image tag
        id: image-tag
        run: echo "::set-output name=data::$(echo ${GITHUB_SHA} | cut -c1-7)"

      - name: Set current image tag
        working-directory: charts/caddy-ingress-controller
        run: envsubst < ci/test-values.yaml.tpl > ci/test-values.yaml
        env:
          TAG: ${{ steps.image-tag.outputs.data }}

      - name: Run chart-testing (install)
        run: ct install --config ct.yaml