fugue-ppl 0.2.0

Monadic PPL with numerically stable inference and comprehensive diagnostics.
Documentation 
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name: Docs
on:
  push:
    branches: [ main ]
    paths: 
      - 'docs/**'
      - '.github/workflows/docs.yml'
  pull_request:
    branches: [ main ]
    paths:
      - 'docs/**'
      - '.github/workflows/docs.yml'

jobs:
  # Job to test and validate documentation
  test:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Install Rust toolchain
        uses: dtolnay/rust-toolchain@stable

      - name: Cache Cargo registry and target
        uses: actions/cache@v4
        with:
          path: |
            ~/.cargo/bin/
            ~/.cargo/registry/index/
            ~/.cargo/registry/cache/
            ~/.cargo/git/db/
            target/
          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
          restore-keys: |
            ${{ runner.os }}-cargo-

      - name: Install mdBook and plugins
        run: |
          # Check if tools are installed with correct major.minor version
          install_if_needed() {
            local tool=$1
            local major_minor=$2
            local cargo_version=$3
            
            if command -v $tool &> /dev/null; then
              local current_version=$($tool --version | grep -oE 'v[0-9]+\.[0-9]+' | head -1)
              if [[ "$current_version" =~ v$major_minor ]]; then
                echo "$tool $current_version already installed and compatible, skipping"
                return
              else
                echo "$tool $current_version found but incompatible, updating to $cargo_version"
              fi
            else
              echo "Installing $tool $cargo_version"
            fi
            
            cargo install $tool --vers "$cargo_version" --locked --force
          }
          
          # Install mdBook with optimizations
          install_if_needed mdbook "0\.4" "^0.4"
          
          # Install plugins
          install_if_needed mdbook-admonish "1\." "^1.18"
          install_if_needed mdbook-mermaid "0\.14" "^0.14"
          install_if_needed mdbook-toc "0\.14" "^0.14"
          install_if_needed mdbook-katex "0\.9" "^0.9"
          # Note: linkcheck skipped due to issues with LaTeX math syntax

      - name: Cache mdBook build
        uses: actions/cache@v4
        with:
          path: docs/book
          key: ${{ runner.os }}-mdbook-${{ hashFiles('docs/**/*.md', 'docs/book.toml') }}
          restore-keys: |
            ${{ runner.os }}-mdbook-

      - name: Build documentation (validates structure)
        run: |
          cd docs
          # Build without linkcheck to avoid false positives with LaTeX math
          # Linkcheck has issues with math equations like \[ and \]
          mdbook build --skip-preprocessor linkcheck || mdbook build

      - name: Validate documentation
        run: |
          cd docs
          # Note: Code examples use `rust,ignore` or `rust,no_run` flags
          # as many are fragments for illustration purposes.
          # Full examples are tested via `cargo test --examples` and `cargo test --doc`
          echo "Documentation structure validated successfully"
          
      - name: Test library documentation
        run: |
          # Test the library's rustdoc examples
          cargo test --doc

      - name: Upload built documentation
        uses: actions/upload-artifact@v4
        with:
          name: built-docs
          path: docs/book
          retention-days: 1

  # Job to build and deploy (only on main branch)
  build-deploy:
    runs-on: ubuntu-latest
    needs: test
    if: github.ref == 'refs/heads/main' && github.event_name == 'push'
    permissions:
      contents: read
      pages: write
      id-token: write
    environment:
      name: github-pages
      url: ${{ steps.deployment.outputs.page_url }}
    
    steps:
      - name: Download built documentation
        uses: actions/download-artifact@v4
        with:
          name: built-docs
          path: docs/book

      - name: Setup Pages
        uses: actions/configure-pages@v5

      - name: Upload Pages artifact
        uses: actions/upload-pages-artifact@v3
        with:
          path: docs/book

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