pr.yml

# Copyright (c) 2023 Red Hat, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

name: Build HTML preview of PR

on:
  # /!\ Warning: using the pull_request_target event to be able to read secrets. But using this event without the cautionary measures described below
  # may allow unauthorized GitHub users to open a “pwn request” and exfiltrate secrets.
  # As recommended in https://iterative.ai/blog/testing-external-contributions-using-github-actions-secrets,
  # we are adding an 'authorize' job that checks if the workflow was triggered from a fork PR. In that case, the "external" environment
  # will prevent the job from running until it's approved manually by human intervention.
  pull_request_target:
    types: [opened, synchronize, reopened, ready_for_review]
    branches: 
    - main
    - rhdh-1.**
    - 1.**.x
    - release-1.**

concurrency:
  group: ${{ github.workflow }}-${{ github.event.number || github.event.pull_request.head.ref }}
  cancel-in-progress: true

env: 
  GH_TEAM: rhdh
  GH_ORGANIZATION: redhat-developer
jobs:
  check-commit-author:
    runs-on: ubuntu-latest
    outputs:
      is_authorized: ${{ steps.check-team-membership.outputs.is_active_member }}
    steps:
      - name: Generate GitHub App Token
        id: app-token
        uses: actions/create-github-app-token@29824e69f54612133e76f7eaac726eef6c875baf # v2.2.1
        with:
          app-id: ${{ secrets.RHDH_GITHUB_APP_ID }}
          private-key: ${{ secrets.RHDH_GITHUB_APP_PRIVATE_KEY }} 
      - name: Check team membership
        uses: redhat-developer/rhdh/.github/actions/check-author@main
        id: check-team-membership
        with:
          team: ${{ env.GH_TEAM }}
          organization: ${{ env.GH_ORGANIZATION }}
          gh_token: ${{ steps.app-token.outputs.token }}
          author: ${{ github.event.pull_request.user.login }}

  authorize:
    # The 'external' environment is configured with the rhdh-content team as required reviewers.
    # All the subsequent jobs in this workflow 'need' this job, which will require manual approval for PRs coming from external forks outside of the rhdh team
    needs: check-commit-author
    environment:
      ${{ (needs.check-commit-author.outputs.is_authorized == 'true' || github.event.pull_request.head.repo.full_name == github.repository) && 'internal' || 'external' }}
    runs-on: ubuntu-latest
    steps:
      - name: Check if internal PR
        id: check
        run: |
          if [[ "${{ needs.check-commit-author.outputs.is_authorized }}" == "true" ]]; then
            echo "✓ Commit author is in rhdh team - using internal environment"
          elif [[ "${{ github.event.pull_request.head.repo.full_name }}" == "${{ github.repository }}" ]]; then
            echo "✓ Internal PR (not from fork) - using internal environment"
          else
            echo "✓ External PR from fork from non-rhdh team member - using external environment for security"
          fi

  adoc_build:
    name: Ccutil Build For PR branch preview
    runs-on: ubuntu-latest
    needs: authorize
    permissions:
      contents: read
      packages: write
      pull-requests: write

    steps:
      - name: Checkout main branch to get trusted build scripts
        uses: actions/checkout@v4
        with:
          ref: main
          path: trusted-scripts

      - name: Checkout PR branch for content to build
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
          ref: ${{ github.event.pull_request.head.ref }}
          repository: ${{ github.event.pull_request.head.repo.full_name }}
          path: pr-content

      - name: Setup environment
        run: |
          # update
          sudo apt-get update -y || true
          # install
          sudo apt-get -y -q install podman && podman --version
          echo "GIT_BRANCH=${GITHUB_HEAD_REF:-${GITHUB_REF#refs/heads/}}" >> $GITHUB_ENV

      - name: Install lychee
        run: |
          LYCHEE_VERSION="v0.23.0"
          curl -sSfL "https://github.com/lycheeverse/lychee/releases/download/lychee-${LYCHEE_VERSION}/lychee-x86_64-unknown-linux-gnu.tar.gz" \
            | sudo tar xz -C /usr/local/bin lychee
          lychee --version

      - name: Restore lychee cache
        uses: actions/cache@v4
        with:
          path: pr-content/.lycheecache
          key: lychee-${{ github.event.number }}-${{ github.sha }}
          restore-keys: |
            lychee-${{ github.event.number }}-
            lychee-

      - name: Build guides and indexes
        id: build
        continue-on-error: true
        env:
          GITHUB_TOKEN: ${{ secrets.RHDH_BOT_TOKEN }}
        run: |
          echo "Building PR ${{ github.event.pull_request.number }}"
          cp trusted-scripts/build/scripts/build-ccutil.sh pr-content/build/scripts/build-ccutil.sh
          cp trusted-scripts/build/scripts/build-orchestrator.js pr-content/build/scripts/build-orchestrator.js
          cp trusted-scripts/build/scripts/error-patterns.json pr-content/build/scripts/error-patterns.json
          cp trusted-scripts/lychee.toml pr-content/lychee.toml
          cp trusted-scripts/.lycheeignore pr-content/.lycheeignore
          touch pr-content/.lycheecache
          cd pr-content
          build/scripts/build-ccutil.sh -b "pr-${{ github.event.number }}"

      - name: Pull from origin before pushing (if possible)
        run: |
          cd pr-content
          /usr/bin/git pull origin gh-pages || true

      # repo must be public for this to work
      - name: Deploy
        uses: peaceiris/actions-gh-pages@v4
        # if: github.ref == 'refs/heads/main'
        with:
          github_token: ${{ secrets.RHDH_BOT_TOKEN }}
          publish_branch: gh-pages
          keep_files: true
          publish_dir: ./pr-content/titles-generated

      - name: Post or update PR comment with doc preview link
        uses: actions/github-script@v7
        with:
          github-token: ${{ secrets.RHDH_BOT_TOKEN }}
          script: |
            const prNum = context.issue.number;
            const previewUrl = `https://redhat-developer.github.io/red-hat-developers-documentation-rhdh/pr-${prNum}/`;
            const now = new Date().toLocaleString('en-US', { timeZone: 'UTC' });
            const body = `Updated preview: ${previewUrl} @ ${now}`;

            const { data: comments } = await github.rest.issues.listComments({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: prNum,
            });

            const existing = comments.find(c =>
              c.body.includes('preview: https://redhat-developer.github.io/')
            );

            if (existing) {
              await github.rest.issues.updateComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                comment_id: existing.id,
                body: body
              });
            } else {
              await github.rest.issues.createComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: prNum,
                body: body
              });
            }