name: CI

on:
  pull_request:
    branches:
      - "*"

  push:
    branches:
      - master

jobs:

  changes:
    runs-on: ubuntu-latest
    outputs:
      go: ${{ steps.filter.outputs.go }}
      charts: ${{ steps.filter.outputs.charts }}

    steps:

      - name: Checkout
        uses: actions/checkout@v1

      - uses: dorny/paths-filter@v2.2.0
        id: filter
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          filters: |
            go:
              - '**/*.go'
              - 'go.mod'
              - 'go.sum'
              - 'rootfs/**/*'
              - 'TAG'
              - 'test/e2e/**/*'
            charts:
              - 'charts/ingress-nginx/Chart.yaml'
              - 'charts/ingress-nginx/*'

  build:
    name: Build
    runs-on: ubuntu-latest
    needs: changes
    if: |
      (needs.changes.outputs.go == 'true')

    steps:

      - name: Checkout
        uses: actions/checkout@v1

      - name: Set up Go 1.15
        id: go
        uses: actions/setup-go@v1
        with:
          go-version: 1.15

      - name: Set up Docker Buildx
        id: buildx
        uses: crazy-max/ghaction-docker-buildx@v1
        with:
          buildx-version: latest
          qemu-version: latest

      - name: Available platforms
        run: echo ${{ steps.buildx.outputs.platforms }}

      - name: Prepare Host
        run: |
          sudo apt-get -qq update || true
          sudo apt-get install -y pigz
          curl -LO https://storage.googleapis.com/kubernetes-release/release/v1.17.0/bin/linux/amd64/kubectl
          chmod +x ./kubectl
          sudo mv ./kubectl /usr/local/bin/kubectl

      - name: Build images
        env:
          TAG: 1.0.0-dev
          ARCH: amd64
          REGISTRY: ingress-controller
        run: |
          echo "building images..."
          make clean-image build image
          make -C test/e2e-image image

          echo "creating images cache..."
          docker save \
            nginx-ingress-controller:e2e \
            ingress-controller/controller:1.0.0-dev \
            | pigz > docker.tar.gz

      - name: cache
        uses: actions/upload-artifact@v2
        with:
          name: docker.tar.gz
          path: docker.tar.gz

  helm:
    name: Helm chart
    runs-on: ubuntu-latest
    needs:
      - changes
    if: |
      (needs.changes.outputs.charts == 'true')

    steps:

      - name: Checkout
        uses: actions/checkout@v1

      - name: Lint
        run: |
          ./build/run-in-docker.sh ./hack/verify-chart-lint.sh

      - name: fix permissions
        run: |
          sudo mkdir -p $HOME/.kube
          sudo chmod -R 777 $HOME/.kube

      - name: Create Kubernetes cluster
        id: kind
        uses: engineerd/setup-kind@v0.4.0
        with:
          version: v0.9.0
          image: kindest/node:v1.18.8

      - name: Test
        env:
          KIND_CLUSTER_NAME: kind
          SKIP_CLUSTER_CREATION: true
        run: |
          kind get kubeconfig > $HOME/.kube/kind-config-kind
          make kind-e2e-chart-tests

  kubernetes:
    name: Kubernetes
    runs-on: ubuntu-latest
    needs:
      - changes
      - build
    if: |
      (needs.changes.outputs.go == 'true')

    strategy:
      matrix:
        k8s: [v1.16.15, v1.17.11, v1.18.8, v1.19.1]

    steps:

      - name: Checkout
        uses: actions/checkout@v1

      - name: cache
        uses: actions/download-artifact@v2
        with:
          name: docker.tar.gz

      - name: Create Kubernetes ${{ matrix.k8s }} cluster
        id: kind
        uses: engineerd/setup-kind@v0.4.0
        with:
          version: v0.9.0
          config: test/e2e/kind.yaml
          image: kindest/node:${{ matrix.k8s }}

      - uses: geekyeggo/delete-artifact@v1
        with:
          name: docker.tar.gz
          failOnError: false

      - name: Prepare cluster for testing
        id: local-path
        run: |
          kubectl version
          echo
          echo "installing helm 3..."
          curl -sSL https://raw.githubusercontent.com/helm/helm/master/scripts/get-helm-3 | bash

      - name: Load images from cache
        run: |
          echo "loading docker images..."
          pigz -dc docker.tar.gz | docker load

      - name: Run e2e tests
        env:
          KIND_CLUSTER_NAME: kind
          SKIP_CLUSTER_CREATION: true
          SKIP_IMAGE_CREATION: true
        run: |
          kind get kubeconfig > $HOME/.kube/kind-config-kind
          make kind-e2e-test