add more advanced pdf convert action

Author: dariubs

.github/workflows/build-pdf.yml

@@ -22,27 +22,36 @@ jobs:
         with:
           python-version: "3.12"
 
-      - name: Install dependencies
-        run: pip install reportlab markdown beautifulsoup4 Pygments
+      - name: Install system fonts
+        run: |
+          sudo apt-get update -qq
+          sudo apt-get install -y -qq fonts-ibm-plex
+
+      - name: Install Python dependencies
+        run: pip install reportlab pygments fonttools
+
+      - name: Convert Inter fonts (OTF → TTF for ReportLab)
+        run: python scripts/convert_fonts.py
 
       - name: Get short commit hash
         id: vars
         run: echo "short_sha=$(git rev-parse --short=6 HEAD)" >> "$GITHUB_OUTPUT"
 
-      - name: Build PDF
-        run: python scripts/build_pdf.py "gitbyexample-${{ steps.vars.outputs.short_sha }}.pdf"
+      - name: Build both PDFs
+        run: python scripts/build_pdf.py "gitbyexample-${{ steps.vars.outputs.short_sha }}" --both
 
       - name: Publish to pdf branch
         run: |
-          PDF_FILE="gitbyexample-${{ steps.vars.outputs.short_sha }}.pdf"
+          SHORT="${{ steps.vars.outputs.short_sha }}"
+          LIGHT="gitbyexample-${SHORT}-light.pdf"
+          DARK="gitbyexample-${SHORT}-dark.pdf"
 
-          # Save the PDF outside the working tree
-          cp "$PDF_FILE" /tmp/"$PDF_FILE"
+          cp "$LIGHT" /tmp/
+          cp "$DARK" /tmp/
 
           git config user.name "github-actions[bot]"
           git config user.email "github-actions[bot]@users.noreply.github.com"
 
-          # Switch to pdf branch (fetch existing or create orphan)
           if git ls-remote --heads origin pdf | grep -q pdf; then
             git fetch origin pdf
             git checkout pdf
@@ -52,23 +61,23 @@ jobs:
             git clean -fd
           fi
 
-          # Copy the new PDF in
-          cp /tmp/"$PDF_FILE" .
+          cp /tmp/"$LIGHT" .
+          cp /tmp/"$DARK" .
 
-          # Clean old PDFs, keep last 10
-          ls -t gitbyexample-*.pdf 2>/dev/null | tail -n +11 | xargs -r rm -f
+          ls -t gitbyexample-*-light.pdf 2>/dev/null | tail -n +11 | xargs -r rm -f
+          ls -t gitbyexample-*-dark.pdf 2>/dev/null | tail -n +11 | xargs -r rm -f
 
-          # Write README for the pdf branch
           cat > README.md << 'EOF'
-          # Git By Example — PDF Builds
+# Git By Example — PDF Builds
 
-          This branch contains auto-generated PDF builds of the book.
+This branch contains auto-generated PDF builds of the book.
 
-          Each push to `main` produces a new PDF named `gitbyexample-<commit>.pdf`.
+Each push to `main` produces two PDFs:
+- `gitbyexample-<commit>-light.pdf` — Light edition
+- `gitbyexample-<commit>-dark.pdf` — Dark edition
 
-          📥 **Download the latest**: check the most recent file below.
-          EOF
-          sed -i 's/^          //' README.md
+📥 **Download the latest**: check the most recent files below.
+EOF
 
           git add README.md gitbyexample-*.pdf
           git commit -m "pdf: build from ${GITHUB_SHA::6}" || echo "No changes to commit"