preview.yml

name: Preview

on:
  pull_request:

jobs:
  preview:
    name: Run preview
    runs-on: ubuntu-latest
    env:
      PREVIEW_HOSTNAME: ep-preview.click
      GITHUB_BRANCH_NAME: ${{ github.head_ref || github.ref_name }}

    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Set timestamp for build/deploy
        run: echo "TIMESTAMP=$(date +%Y%m%d%H%M%S)" >> $GITHUB_ENV

      - name: Set up pnpm
        uses: pnpm/action-setup@v4
        with:
          run_install: false

      - name: Set up Node.js
        uses: actions/setup-node@v4
        with:
          node-version: 20
          cache: "pnpm"

      - name: Install dependencies
        run: make install

      - name: Build the website
        run: make build

      - name: Set up SSH key
        uses: webfactory/ssh-agent@v0.9.0
        with:
          ssh-private-key: ${{ secrets.DEPLOY_SSH_KEY }}

      - name: Get current branch name
        run: |
          BRANCH_NAME=$(make safe_branch BRANCH=$GITHUB_BRANCH_NAME)
          echo "BRANCH_NAME=${BRANCH_NAME}" >> $GITHUB_ENV

      - name: ssh keyscan
        run: ssh-keyscan "static.europython.eu" > ~/.ssh/known_hosts

      - name: Upload preview
        run: make preview BRANCH=$GITHUB_BRANCH_NAME

      - name: Update PR Comment
        uses: actions/github-script@v6
        if: github.event_name == 'pull_request'

        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            console.log("Hello world!");
            const pr_id = ${{ github.event.number }};
            console.log("PR Id %d", pr_id);

            comments = await github.paginate(github.rest.issues.listComments, {
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: Number(pr_id)
            })

            const preview_identifier = "# Preview available"

            let comment_id = null;
            comments.forEach(comment => {
              if(comment.body.indexOf(preview_identifier) >= 0) {
                comment_id = comment.id;
              }
            });

            const branch_name = process.env.BRANCH_NAME;
            const url = "https://" + branch_name + "." + process.env.PREVIEW_HOSTNAME;
            const timestamp = new Date().toISOString();
            const header = "\n|Key|Value|\n|---|---|\n"
            const body = preview_identifier + header + "|url|" + url + "|\n|last update|" + timestamp + "|";

            if(comment_id > 0) {
              await github.rest.issues.updateComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                comment_id: comment_id,
                body: body
              });

            } else {

              await github.rest.issues.createComment({
                issue_number: Number(pr_id),
                owner: context.repo.owner,
                repo: context.repo.repo,
                body: body
              });
            }