deploy-preview.yaml

# Workflow for making a preview deployment of the blog
name: Deploy blog preview

on:
  pull_request:
    types:
      - opened
      - synchronize
      - reopened

concurrency:
  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}

# Default to bash
defaults:
  run:
    shell: bash

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}

jobs:
  # Build job
  build:
    if: ${{ github.actor != 'dependabot[bot]' }}
    runs-on: ubuntu-latest
    outputs:
      image: ${{ steps.docker_image.outputs.image }}
      image_repository: ${{ steps.docker_image.outputs.image_repository }}
      image_tag: ${{ steps.docker_image.outputs.image_tag }}
    permissions:
      contents: read
      packages: write
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Docker image metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: type=sha
      - name: Extract Docker image name
        id: docker_image
        env:
          IMAGE_TAGS: ${{ steps.meta.outputs.tags }}
        run: |
          IMAGE=$(echo "$IMAGE_TAGS" | cut -d" " -f1)
          IMAGE_REPOSITORY=$(echo "$IMAGE" | cut -d":" -f1)
          IMAGE_TAG=$(echo "$IMAGE" | cut -d":" -f2)
          echo "image=$IMAGE" >> "$GITHUB_OUTPUT"
          echo "image_repository=$IMAGE_REPOSITORY" >> "$GITHUB_OUTPUT"
          echo "image_tag=$IMAGE_TAG" >> "$GITHUB_OUTPUT"
      - name: Set up node
        uses: actions/setup-node@v4
        with:
          node-version: "20.17.0"
      - name: Set up Docker buildx
        uses: docker/setup-buildx-action@v3
      - name: Set up Docker
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - name: Install dependencies
        run: npm clean-install
      - name: Build site
        run: npm run build
      - name: Build and push Docker image
        uses: docker/build-push-action@v6
        with:
          context: .
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=registry,ref=${{ steps.docker_image.outputs.image_repository }}:buildcache
          cache-to: type=registry,ref=${{ steps.docker_image.outputs.image_repository }}:buildcache,mode=max

  deploy:
    # Deploy job
    if: ${{ github.actor != 'dependabot[bot]' }}
    runs-on: ubuntu-latest
    needs: [build]
    environment:
      name: renku-blog-ci-${{ github.event.number }}
      url: https://renku-blog-ci-${{ github.event.number }}.dev.renku.ch
    permissions:
      contents: read
      pull-requests: write
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Set up Helm
        uses: azure/setup-helm@v4
      - name: Deploy helm chart
        env:
          RELEASE: renku-blog-ci-${{ github.event.number }}
          KUBECONFIG: "${{ github.workspace }}/renkubot-kube.config"
          RENKUBOT_KUBECONFIG: ${{ secrets.RENKUBOT_DEV_KUBECONFIG }}
        run: |
          NAMESPACE=${RELEASE}
          HOST=renku-blog-ci-${{ github.event.number }}.dev.renku.ch
          IMAGE=$(echo "$IMAGE_TAGS" | cut -d" " -f1)
          IMAGE_REPOSITORY=${{ needs.build.outputs.image_repository }}
          IMAGE_TAG=${{ needs.build.outputs.image_tag }}
          echo "$RENKUBOT_KUBECONFIG" > "$KUBECONFIG" && chmod 400 "$KUBECONFIG"
          kubectl create namespace ${NAMESPACE} || true
          helm upgrade --install ${RELEASE} ./helm-chart/renku-blog \
            --namespace=${NAMESPACE} --timeout 5m --wait --wait-for-jobs \
            --set image.repository=${IMAGE_REPOSITORY} --set image.tag=${IMAGE_TAG} \
            --set ingress.enabled=true --set ingress.hosts[0].host=${HOST} \
            --set ingress.hosts[0].paths[0].path="/" --set ingress.hosts[0].paths[0].pathType="Prefix" \
            --set ingress.tls[0].secretName="${RELEASE}-tls" \
            --set ingress.tls[0].hosts[0]=${HOST}
      - name: Find deployment comment
        uses: peter-evans/find-comment@v3
        id: find_comment
        with:
          issue-number: ${{ github.event.pull_request.number }}
          # comment-author: "RenkuBot"
          comment-author: "github-actions[bot]"
          body-includes: You can access the deployment of this PR at
      - name: Deployment comment
        if: steps.find_comment.outputs.comment-id == ''
        uses: peter-evans/create-or-update-comment@v4
        with:
          # token: ${{ secrets.RENKUBOT_GITHUB_TOKEN }}
          issue-number: ${{ github.event.pull_request.number }}
          body: |
            You can access the deployment of this PR at https://renku-blog-ci-${{ github.event.number }}.dev.renku.ch
          reactions: "rocket"