look-new-pr-test.yaml

name: Look for new PR with label preview-environment

on:
  workflow_dispatch:
  schedule:
    - cron: "*/5 * * * *"

concurrency: check_pr

jobs:
  checks:
    name: Check whether a new PR has label preview-environment
    runs-on: ubuntu-latest
    steps:
      - uses: actions/setup-node@v3
        with:
          node-version: 16
      - name: Helm Installation
        uses: azure/setup-helm@v3
      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3
        with:
          platforms: all
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3
      - name: Install kubectl
        uses: azure/setup-kubectl@v3
      - name: install npm packages and kubernetes
        run: |
          npm install @kubernetes/client-node nodejs-helm bluebird git-clone
          mkdir -p ~/.kube
          echo "$KUBECONFIG_TEXT" > ~/.kube/config
          chmod 600 ~/.kube/config
          helm repo add searxng https://charts.searxng.org
          helm repo update
        env:
          KUBECONFIG_TEXT: ${{secrets.KUBECONFIG_TEXT}}
      - name: Login to Quay.io
        uses: docker/login-action@v2
        with:
          registry: quay.io
          username: ${{ secrets.QUAY_USERNAME }}
          password: ${{ secrets.QUAY_PASSWORD }}
      - name: Check whether a new PR has label preview-environment
        uses: actions/github-script@v6
        with:
          github-token: ${{ secrets.GH_PAT }}
          script: |
            const k8s = require('@kubernetes/client-node');
            const clone = require('git-clone/promise');
            let Promise = require("bluebird");
            const Helm = require("nodejs-helm").Helm;
            let helm = Promise.promisifyAll(new Helm({helmCommand: "helm"}));

            const kc = new k8s.KubeConfig();
            kc.loadFromDefault();
            const k8sApi = kc.makeApiClient(k8s.CoreV1Api);
            const pullrequests = await github.rest.pulls.list({
              owner: "searxng",
              repo: "searxng",
              per_page: 100,
              state: "open",
            })
            for (const pullrequest of pullrequests.data) {
              if (pullrequest.labels.some(item => item.name === 'preview-environment')
                  || pullrequest.labels.some(item => item.name === 'preview-environment-commented')) {
                const prNumber = pullrequest.number;
                const prHeadHash = pullrequest.head.sha;
                const optionsGetReleaseInfo = {
                    releaseName: 'searxng-preview',
                    subCommand: 'all',
                    namespace: `searxng-${prNumber}`
                }
                let releaseImageTag = "";
                try {
                  const helmReleaseInfo = await helm.getAsync(optionsGetReleaseInfo);
                  releaseImageTag = helmReleaseInfo[0].image.tag;
                } catch (error) {
                  try {
                    await k8sApi.createNamespace({
                      metadata: {
                          name: `searxng-${prNumber}`,
                      },
                    });
                  } catch (error) {

                  }
                }
                if (releaseImageTag == "" || releaseImageTag != prHeadHash) {
                  await clone(pullrequest.head.repo.clone_url, `./searxng-${prNumber}`, {checkout: pullrequest.head.ref });
                  const optionsExec = {
                    cwd: `./searxng-${prNumber}`
                  }
                  await exec.exec('docker', ["buildx", "build", "--platform", "linux/amd64,linux/arm64", "--push", "--build-arg", "quay_expiration=300d", "-t", `quay.io/searxng/searxng-test-pr:${prHeadHash}`, "-f", "Dockerfile", "."], optionsExec);
                  const optionsInstallRelease = {
                      reuseValues: false,
                      resetValues: true,
                      chartName: "searxng/searxng",
                      releaseName: "searxng-preview",
                      namespace: `searxng-${prNumber}`,
                      install: true,
                      values: {
                          "image.repository": "quay.io/searxng/searxng-test-pr",
                          "image.tag": prHeadHash,
                          "searxng.config.server.secret_key": "secret",
                          "searxng.config.outgoing.proxies.all://[0]": "http://holaproxy-holaproxy.holaproxy.svc.cluster.local:8080",
                          "env.BASE_URL": `https://${prNumber}.testpr.searxng.net`,
                          "env.INSTANCE_NAME": `pr-${prNumber}`,
                          "env.UWSGI_WORKERS": '1',
                          "ingress.main.enabled": true,
                          "ingress.main.hosts[0].host": `${prNumber}.testpr.searxng.net,ingress.main.hosts[0].paths[0].path=/,ingress.main.hosts[0].paths[0].pathType=Prefix`,
                      }
                  };
                  await helm.upgradeAsync(optionsInstallRelease);
                }
                if (!pullrequest.labels.some(item => item.name === 'preview-environment-commented')) {
                  await github.rest.issues.createComment({
                    issue_number: prNumber,
                    owner: "searxng",
                    repo: "searxng",
                    body: `Preview environment deployed at https://${prNumber}.testpr.searxng.net`
                  });
                  await github.rest.issues.addLabels({
                    issue_number: prNumber,
                    owner: "searxng",
                    repo: "searxng",
                    labels: ['preview-environment-commented']
                  })
                  await github.rest.issues.removeLabel({
                    issue_number: prNumber,
                    owner: "searxng",
                    repo: "searxng",
                    name: 'preview-environment'
                  })
                }
              }
            }