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path: root/.github/workflows/docs-preview.yml
blob: f5529aa644340466e8b057295af3db44eba22028 (plain)
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name: Build and Preview Manual

on:
  workflow_dispatch:
  pull_request_target:
    types: [opened, synchronize, reopened, labeled, unlabeled, edited]
    paths:
      - ".github/workflows/docs-preview.yml"
      - "modules/**"
      - "docs/**"

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

jobs:
  build-preview:
    runs-on: ubuntu-latest
    # NOTE: This job runs untrusted code.
    # Don't give it any permissions.
    permissions: {}
    steps:
      - uses: actions/checkout@v7
        with:
          ref: ${{ github.event.pull_request.head.sha }}
          persist-credentials: false
          # NOTE: Only doing this, because we set `permissions: {}`
          # to ensure, no secrets can leak here.
          allow-unsafe-pr-checkout: true

      - uses: cachix/install-nix-action@v31.11.1
        with:
          nix_path: nixpkgs=channel:nixos-unstable
          extra_nix_config: |
            substituters = https://cache.nixos.org/ https://feel-co.cachix.org
            trusted-public-keys = cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY= feel-co.cachix.org-1:nwEFNnwZvtl4KKSH5LDg+/+K7bV0vcs6faMHAJ6xx0w=

      - uses: cachix/cachix-action@v17
        with:
          authToken: ${{ secrets.CACHIX_TOKEN }}
          extraPullNames: nix-community
          name: nvf

      - name: Set default git branch (to reduce log spam)
        run: git config --global init.defaultBranch main

      - name: Build documentation packages
        run: nix build .#docs-html --print-build-logs || exit 1

      - name: Upload built docs
        uses: actions/upload-artifact@v7
        with:
          name: docs-html
          path: result/share/doc/
          retention-days: 1

  deploy-preview:
    needs: build-preview
    runs-on: ubuntu-latest
    permissions:
      contents: write
    steps:
      - name: Download built docs
        uses: actions/download-artifact@v8
        with:
          name: docs-html
          path: built-docs

      - name: Deploy to GitHub Pages preview
        run: |
          PR_NUMBER=${{ github.event.pull_request.number }}
          BRANCH_NAME="gh-pages"
          PREVIEW_DIR="docs-preview-${PR_NUMBER}"

          # Clone the gh-pages branch and move to the preview subdirectory
          git clone --single-branch --branch $BRANCH_NAME https://github.com/${{ github.repository }} gh-pages
          cd gh-pages

          mkdir -p $PREVIEW_DIR

          # Copy the build files to the preview subdirectory
          cp -rvf ../built-docs/* ./$PREVIEW_DIR

          # Configure git to use the GitHub Actions token for authentication
          git config --global user.name "GitHub Actions"
          git config --global user.email "actions@github.com"

          # Set the GitHub token for authentication
          git remote set-url origin https://x-access-token:${{ secrets.GITHUB_TOKEN }}@github.com/${{ github.repository }}

          # Add and commit the changes
          git add --all
          git commit -m "Deploy PR #${PR_NUMBER} preview" || echo "No changes to commit"
          git push --force origin $BRANCH_NAME

  comment:
    needs: deploy-preview
    runs-on: ubuntu-latest
    permissions:
      pull-requests: write
    steps:
      - name: Prepare Environment
        id: prelude
        run: |
          PR_NUMBER=${{ github.event.pull_request.number }}
          URL="https:///nvf.notashelf.dev/docs-preview-${PR_NUMBER}/"

          # Propagate non-interpolatable environment vars
          echo "URL=$URL" >> "$GITHUB_OUTPUT"
          echo "REV=$GITHUB_SHA" >> "$GITHUB_OUTPUT"
          echo "ACTOR=$GITHUB_ACTOR" >> "$GITHUB_OUTPUT"
          echo "REF=$GITHUB_HEAD_REF" >> "$GITHUB_OUTPUT"
          echo "RUNS=$GITHUB_RUN_NUMBER" >> "$GITHUB_OUTPUT"

          echo "Live Preview URL: $URL"
          echo "Rev: $GITHUB_SHA"
          echo "Actor: $GITHUB_ACTOR"
          echo "Ref: "$GITHUB_HEAD_REF"
          echo "Reruns: "$GITHUB_RUN_NUMBER"

          echo "### :rocket: Live Preview Deployed " >> "$GITHUB_STEP_SUMMARY"
          echo "Preview can be found at ${URL}" >> "$GITHUB_STEP_SUMMARY"

      - name: Find Comment
        uses: peter-evans/find-comment@v4
        id: fc
        with:
          comment-author: "github-actions[bot]"
          issue-number: ${{ github.event.pull_request.number }}
          body-includes: "Live preview deployed"

      - name: Post live preview comment
        uses: peter-evans/create-or-update-comment@v5
        env:
          COMMENT_ID: ${{ steps.fc.outputs.comment-id }}
          URL: ${{ steps.prelude.outputs.URL }}
          GITHUB_SHA: ${{ steps.prelude.outputs.REV }}
          ACTOR: ${{ steps.prelude.outputs.ACTOR }}
          REF: ${{ steps.prelude.outputs.REF }}
          RUNS: ${{ steps.prelude.outputs.RUNS }}
        with:
          comment-id: ${{ env.COMMENT_ID }}
          issue-number: ${{ github.event.pull_request.number }} # issue number also applies to pull requests
          edit-mode: replace # replace previous body
          body: |
            ### :rocket: Live preview deployed from ${{ env.GITHUB_SHA }}

            View it [here](${{ env.URL }}):

            <details>
              <summary><strong>Debug Information</strong></summary>
              <p>Triggered by: ${{ env.ACTOR }}</p>
              <p><code>HEAD</code> at: ${{ env.REF }}</p>
              <p>Reruns: ${{ env.RUNS }}</p>
            </details>

  cleanup-preview:
    if: ${{ github.event.pull_request.merged == true || github.event.pull_request.state == 'closed' }}
    runs-on: ubuntu-latest
    permissions:
      contents: write
    steps:
      - name: Checkout repository
        uses: actions/checkout@v7

      - name: Delete preview for closed/merged PR
        run: |
          PR_NUMBER=${{ github.event.pull_request.number }}
          BRANCH_NAME="gh-pages"
          PREVIEW_DIR="docs-preview-${PR_NUMBER}"

          # Clone the gh-pages branch
          git clone --single-branch --branch $BRANCH_NAME https://github.com/${{ github.repository }} gh-pages
          cd gh-pages

          # Check if the preview directory exists, and delete it if it does
          if [ -d "$PREVIEW_DIR" ]; then
            echo "Deleting preview directory $PREVIEW_DIR"
            rm -rf $PREVIEW_DIR
          else
            echo "Preview directory $PREVIEW_DIR does not exist. Skipping deletion."
          fi

          # Configure git to use the GitHub Actions token for authentication
          git config --global user.name "GitHub Actions"
          git config --global user.email "actions@github.com"

          # Set the GitHub token for authentication
          git remote set-url origin https://x-access-token:${{ secrets.GITHUB_TOKEN }}@github.com/${{ github.repository }}

          # Add and commit the changes (only if there's something to delete)
          git add .
          git diff --quiet || git commit -m "Remove preview for PR #${PR_NUMBER}"
          git push origin $BRANCH_NAME

  cleanup-comment:
    needs: cleanup-preview
    runs-on: ubuntu-latest
    permissions:
      pull-requests: write
    steps:
      - name: Checkout repository
        uses: actions/checkout@v7

      - name: Double check preview directory deletion
        run: |
          # Check if the preview directory exists, and delete it if it does
          if [ -d "docs-preview-${{ github.event.pull_request.number }}" ]; then
            echo "Something went wrong, preview directory is not deleted."
            exit 1
          else
            echo "Preview directory has been deleted successfully, proceeding."
          fi

      - name: Post cleanup verification
        uses: peter-evans/create-or-update-comment@v5
        with:
          issue-number: ${{ github.event.pull_request.number }}
          body: |
            ✅ Preview has been deleted successfully!