ci.yml

name: CI
on: [push, pull_request]
jobs:
  build:
    name: Build & test
    runs-on: ubuntu-latest
    container: httptoolkit/act-build-base:v3.0.0
    steps:
      - uses: actions/checkout@v3

      # Install Node 14
      - uses: actions/setup-node@v3
        with:
          node-version: 14
          cache: 'npm'

      - run: npm install -g npm@8.5.5

      # Install & build & test:
      - run: npm ci

      # Build without secrets for previews, in non-push cases:
      - name: Build for preview
        if: github.event_name != 'push'
        run: npm run build
        env:
          NODE_ENV: development

      # Build with secrets for production, on push only:
      - name: Build for production
        if: github.event_name == 'push'
        run: npm run build
        env:
          NODE_ENV: production
          GATSBY_POSTHOG_KEY: ${{ secrets.GATSBY_POSTHOG_KEY }}

      - uses: actions/upload-artifact@v3
        with:
          name: public
          path: public/*
          if-no-files-found: error

      - uses: actions/upload-artifact@v3
        with:
          name: rss
          path: public/rss.xml
          if-no-files-found: error

  check-blog-changes:
    name: Check for new blog posts to announce
    if: github.event_name == 'push'
    runs-on: ubuntu-latest
    container: httptoolkit/act-build-base:v3.0.0
    needs: build
    outputs:
      new-blog-post: ${{ steps.detect-changes.outputs.new-blog-post }}
    steps:
      - uses: actions/checkout@v3

      - uses: actions/download-artifact@v3
        with:
          name: rss
          path: local-rss

      - id: detect-changes
        name: 'Check for RSS differences'
        shell: bash
        run: |
          curl -f https://httptoolkit.com/rss.xml > remote-rss.xml

          sudo apt-get update && sudo apt-get install xmlstarlet

          LOCAL_POSTS=$(xmlstarlet sel -t -v '//rss/channel/item/link' local-rss/rss.xml)
          REMOTE_POSTS=$(xmlstarlet sel -t -v '//rss/channel/item/link' remote-rss.xml)

          # Matches remote posts against each local post, excludes those matches,
          # and returns the remaining lines (or nothing, if there are none):
          NEW_POSTS=$(grep -vFxf <(echo "$REMOTE_POSTS") <(echo "$LOCAL_POSTS") || true)

          if [[ $(echo "$NEW_POSTS" | wc -l) -gt 1 ]]; then
              echo "More than one new post found - something odd is happening, failing the job"
              exit 1
          fi

          # Grab the slug (the last path chunk) from each URL:
          NEW_POST_SLUGS=$(echo $NEW_POSTS | sed -E 's|.*/([^/]+)/?$|\1|')

          # Ensure the output is exactly an empty string, if not a post (trim newlines etc):
          if [[ ! -z "$(echo "$NEW_POST_SLUGS" | tr -d '\n')" ]]; then
            echo "New blog post: $NEW_POST_SLUGS"
            echo "new-blog-post=$(echo $NEW_POST_SLUGS)" >> "$GITHUB_OUTPUT"
          else
            echo "No new blog posts"
            echo "new-blog-post=" >> "$GITHUB_OUTPUT"
          fi

  publish-docker:
    name: Build & publish container to Docker Hub
    if: github.event_name == 'push' && !startsWith(github.ref, 'refs/heads/dependabot/')
    runs-on: ubuntu-latest
    container: httptoolkit/act-build-base
    needs: build
    steps:
      - uses: actions/checkout@v3

      - uses: actions/download-artifact@v3
        with:
          name: public
          path: public

      - uses: docker/setup-buildx-action@v2
      - name: Login to DockerHub
        uses: docker/login-action@v2
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}

      - name: Extract Docker metadata
        id: meta
        uses: docker/metadata-action@v4
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          images: httptoolkit/website
          tags: |
            type=raw,value=prod,enable={{is_default_branch}}
            type=raw,value=latest,enable={{is_default_branch}}
            type=sha

      - name: Publish to Docker Hub
        uses: docker/build-push-action@v4
        with:
          context: .
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}

  publish-scaleway:
    name: Deploy to Scaleway
    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
    runs-on: ubuntu-latest
    container: httptoolkit/act-build-base:v3.0.0
    needs: publish-docker
    steps:
      - name: Redeploy container
        uses: thibaultchazal/scaleway-serverless-container-deploy-action@0d290edda0c3359e51442bd8bf730eafef4e290f
        with:
          container_id: ${{ vars.SCW_API_CONTAINER_ID }}
          secret_key: ${{ secrets.SCW_SECRET_KEY }}
          registry_image_url: "registry.hub.docker.com/httptoolkit/website:prod"

      - name: Flush CDN cache
        run: |
          # Wait a little - the reploy command doesn't wait for the container to start up
          sleep 30

          # Clear CDN cache to re-request content:
          curl -f --request POST \
            --url https://api.bunny.net/pullzone/$PULL_ZONE_ID/purgeCache \
            --header "AccessKey: $BUNNY_SITE_API_KEY"
        env:
          PULL_ZONE_ID: 960393
          BUNNY_SITE_API_KEY: ${{ secrets.BUNNY_SITE_API_KEY }}

  announce-blog-changes:
    name: Announce new blog posts
    if: github.event_name == 'push' && github.ref == 'refs/heads/main' && needs.check-blog-changes.outputs.new-blog-post != ''
    runs-on: ubuntu-latest
    container: httptoolkit/act-build-base:v3.0.0
    needs:
      - check-blog-changes
      - publish-scaleway
    steps:
      - name: Get title & content for the changed post
        id: read-post
        run: |
          SLUG="${{ needs.check-blog-changes.outputs.new-blog-post }}"
          MARKDOWN=$(cat "src/posts/$SLUG.md")
          FRONTMATTER=$(echo $MARKDOWN | sed -n '/^---$/,/^---$/p')

          # Get the title - stripping any surrounding quotes if required
          TITLE=$(echo $FRONTMATTER |
            sed -n 's/^title: //p' |
            sed 's/^"//; s/"$//' |
            sed "s/^'//; s/'$//"
          )
          echo "::set-output name=title::$TITLE"

          # Get the post content, stripping out frontmatter:
          CONTENT=$(echo $MARKDOWN | sed '0,/^---$/d; 0,/^---$/d')
          echo "::set-output name=content::$CONTENT"

          URL="https://httptoolkit.com/blog/$SLUG/"
          echo "::set-output name=c::$URL"

      - name: WIP - log the results
        run: |
          echo "Title: ${{ steps.read-post.outputs.title }}"
          echo "URL: ${{ steps.read-post.outputs.title }}"
          echo "Content: ${{ steps.read-post.outputs.title }}"