# Part of the Carbon Language project, under the Apache License v2.0 with LLVM
# Exceptions. See /LICENSE for license information.
# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

name: GitHub Pages deploy

on:
  # Runs on pushes targeting the default branch.
  push:
    branches: ['trunk']

  # Allows you to run this workflow manually from the Actions tab.
  workflow_dispatch:

# Cancel previous workflows on the PR when there are multiple fast commits.
# https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#concurrency
concurrency:
  group: ${{ github.workflow }}-${{ github.head_ref || github.ref }}
  cancel-in-progress: true

# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages.
permissions:
  contents: read
  pages: write
  id-token: write

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Harden Runner
        uses: step-security/harden-runner@58077d3c7e43986b6b15fba718e8ea69e387dfcc # v2.15.1
        with:
          egress-policy: audit

      - name: Checkout
        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
      - name: Prebuild actions
        run: ./website/prebuild.py
      - name: Setup Pages
        uses: actions/configure-pages@983d7736d9b0ae728b81ab479565c72886d7745b # v5.0.0
      - name: Setup Ruby
        uses: ruby/setup-ruby@6ca151fd1bfcfd6fe0c4eb6837eb0584d0134a0c # v1.290.0
        with:
          # Runs 'bundle install' and caches installed gems automatically.
          bundler-cache: true
          # Increment this number if you need to re-download cached gems.
          cache-version: 0
      - name: Build with Jekyll
        env:
          JEKYLL_ENV: production
        run: |
          bundle exec jekyll build --verbose \
            --source ./ \
            --destination ./_site \
            --baseurl "${{ steps.pages.outputs.base_path }}"
      - name: Upload artifact
        # Automatically uploads an artifact from the './_site' directory by
        # default.
        uses: actions/upload-pages-artifact@7b1f4a764d45c48632c6b24a0339c27f5614fb0b # v4.0.0

  deploy:
    environment:
      name: github-pages
      url: ${{ steps.deployment.outputs.page_url }}
    runs-on: ubuntu-latest
    needs: build
    steps:
      - name: Harden Runner
        uses: step-security/harden-runner@58077d3c7e43986b6b15fba718e8ea69e387dfcc # v2.15.1
        with:
          egress-policy: audit

      - name: Deploy to GitHub Pages
        id: deployment
        uses: actions/deploy-pages@d6db90164ac5ed86f2b6aed7e0febac5b3c0c03e # v4.0.5
