doc-build-pdf.yml

name: Build documentation (PDF)

on:
  pull_request:
  push:
  workflow_dispatch:
    # Allow to run manually
    inputs:
      platform:
        description: 'Platform'
        required: true
        default: 'ubuntu-focal-standard'
      docker_tag:
        description: 'Docker tag'
        required: true
        default: 'dev'

concurrency:
  # Cancel previous runs of this workflow for the same branch
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

jobs:
  get_ci_fixes:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        id: checkout
        uses: actions/checkout@v4
      - name: Merge CI fixes from sagemath/sage
        run: |
          .ci/merge-fixes.sh
        env:
          GH_TOKEN: ${{ github.token }}
      - name: Store CI fixes in upstream artifact
        run: |
          mkdir -p upstream
          if git format-patch --stdout test_base > ci_fixes.patch; then
            cp ci_fixes.patch upstream/
          fi
      - uses: actions/upload-artifact@v3
        with:
          path: upstream
          name: upstream

  build-docs-pdf:
    runs-on: ubuntu-latest
    container: ghcr.io/sagemath/sage/sage-${{ github.event.inputs.platform || 'ubuntu-focal-standard' }}-with-targets:${{ github.event.inputs.docker_tag || 'dev'}}
    needs: [get_ci_fixes]
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Update system packages
        run: |
          export PATH="build/bin:$PATH"
          eval $(sage-print-system-package-command auto update)
          eval $(sage-print-system-package-command auto --yes --no-install-recommends install zip)
          eval $(sage-print-system-package-command auto --spkg --yes --no-install-recommends install git texlive)


      - name: Add prebuilt tree as a worktree
        id: worktree
        run: |
          set -ex
          git config --global user.email "ci-sage@example.com"
          git config --global user.name "Build & Test workflow"
          git config --global --add safe.directory $(pwd)
          # If actions/checkout downloaded our source tree using the GitHub REST API
          # instead of with git (because do not have git installed in our image),
          # we first make the source tree a repo.
          if [ ! -d .git ]; then git init && git add -A && git commit --quiet -m "new"; fi
          # Tag this state of the source tree "new". This is what we want to build and test.
          git tag -f new
          # Our container image contains a source tree in /sage with a full build of Sage.
          # But /sage is not a git repository.
          # We make /sage a worktree whose index is at tag "new".
          # We then commit the current sources and set the tag "old". (This keeps all mtimes unchanged.)
          # Then we update worktree and index with "git reset --hard new".
          # (This keeps mtimes of unchanged files unchanged and mtimes of changed files newer than unchanged files.)
          # Finally we reset the index to "old". (This keeps all mtimes unchanged.)
          # The changed files now show up as uncommitted changes.
          # The final "git add -N" makes sure that files that were added in "new" do not show
          # as untracked files, which would be removed by "git clean -fx".
          git worktree add --detach worktree-image
          rm -rf /sage/.git && mv worktree-image/.git /sage/
          rm -rf worktree-image && ln -s /sage worktree-image
          if [ ! -f worktree-image/.gitignore ]; then cp .gitignore worktree-image/; fi
          (cd worktree-image && git add -A && git commit --quiet --allow-empty -m "old" -a && git tag -f old && git reset --hard new && git reset --quiet old && git add -N . && git status)
          # Keep track of changes to built HTML
          new_version=$(cat src/VERSION.txt); (cd /sage/local/share/doc/sage/html/en && find . -name "*.html" | xargs sed -i '/class="sidebar-brand-text"/s/Sage [0-9a-z.]* /Sage '$new_version' /'; git init && (echo "*.svg binary"; echo "*.pdf binary") >> .gitattributes && (echo ".buildinfo"; echo '*.inv'; echo '.git*'; echo '*.svg'; echo '*.pdf'; echo '*.png'; echo 'searchindex.js') > .gitignore; git add -A && git commit --quiet -m "old")

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

      - name: Apply CI fixes from sagemath/sage
        # After applying the fixes, make sure all changes are marked as uncommitted changes.
        run: |
          if [ -r upstream/ci_fixes.patch ]; then
            (cd worktree-image && git commit -q -m "current changes" --allow-empty -a && git am; git reset --quiet old; git add -N .) < upstream/ci_fixes.patch
          fi

      - name: Incremental build
        id: incremental
        run: |
          # Now re-bootstrap and build. The build is incremental because we were careful with the timestamps.
          ./bootstrap && make build
        working-directory: ./worktree-image
        env:
          MAKE: make -j2
          SAGE_NUM_THREADS: 2

      - name: Build (fallback to non-incremental)
        id: build
        if: always() && steps.worktree.outcome == 'success' && steps.incremental.outcome != 'success'
        run: |
          set -ex
          make doc-clean doc-uninstall sagelib-clean && git clean -fx src/sage && ./config.status && make build
        working-directory: ./worktree-image
        env:
          MAKE: make -j2
          SAGE_NUM_THREADS: 2

      - name: Build docs (PDF)
        id: docbuild
        if: always() && (steps.incremental.outcome == 'success' || steps.build.outcome == 'success')
        run: make build V=0 && make doc-pdf
        working-directory: ./worktree-image
        env:
          MAKE: make -j2
          SAGE_NUM_THREADS: 2

      - name: Copy docs
        if: always() && steps.docbuild.outcome == 'success'
        run: |
          # For some reason the deploy step below cannot find /sage/...
          # So copy everything from there to local folder
          mkdir -p ./docs
          cp -r -L /sage/local/share/doc/sage/pdf/en/* ./docs
          # Zip everything for increased performance
          zip -r docs-pdf.zip docs

      - name: Upload docs
        if: always() && steps.copy.outcome == 'success'
        uses: actions/upload-artifact@v3
        with:
          name: docs-pdf
          path: docs-pdf.zip