6 add styling to the pdf creation (#13)

* update release flow

* Update reusable-release-export.yml

Author: ssteinbuss

.github/workflows/reusable-release-export.yml

@@ -1,12 +1,59 @@
-name: Release (Export + Cover)
+name: Reusable Release Export (Pandoc in Docker)
 
 on:
-  release:
-    types: [published]
-  workflow_dispatch:
+  workflow_call:
+    inputs:
+      summary_path:
+        description: "Path to summary.md in the caller repository"
+        required: true
+        type: string
+
+      content_dir:
+        description: "Working directory of the caller repository content"
+        required: false
+        type: string
+        default: .
+
+      output_basename:
+        description: "Base name for produced artifacts (without extension)"
+        required: false
+        type: string
+        default: documentation
+
+      # Prebuilt image containing pandoc + xelatex + fonts
+      pandoc_image:
+        required: false
+        type: string
+        default: ghcr.io/<ORG>/pandoc-latex-fonts:3.9
+
+      # Knowledge Base PDF defaults
+      papersize:
+        required: false
+        type: string
+        default: a4
+      margin:
+        required: false
+        type: string
+        default: 2.5cm
+      fontsize:
+        required: false
+        type: string
+        default: 11pt
+      mainfont:
+        required: false
+        type: string
+        default: Noto Sans
+      sansfont:
+        required: false
+        type: string
+        default: Noto Sans
+      monofont:
+        required: false
+        type: string
+        default: Fira Code
 
 permissions:
-  contents: write
+  contents: read
 
 jobs:
   export:
@@ -28,38 +75,60 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - name: Checkout repository (to access assets/cover.pdf)
+      - name: Checkout caller repository
         uses: actions/checkout@v4
 
-      - name: Download export artifacts
-        uses: actions/download-artifact@v4
+      - name: Checkout shared repository (.github) for assemble script
+        uses: actions/checkout@v4
         with:
-          name: release-export
-          path: exports
+          repository: International-Data-Spaces-Association/.github
+          path: _shared
 
-      - name: Merge cover + body PDF (create additional artefact)
+      - name: Assemble markdown from summary (shared script)
+        working-directory: ${{ inputs.content_dir }}
         run: |
-          python -m pip install --upgrade pip
-          python -m pip install pypdf
-          python - <<'PY'
-          from pypdf import PdfWriter
+          python3 ../_shared/scripts/assemble_from_summary.py \
+            --summary "${{ inputs.summary_path }}" \
+            --out "../combined.md" \
+            --fail-on-missing
 
-          cover = "assets/cover.pdf"
-          body  = "exports/knowledge-base.pdf"
-          out   = "exports/knowledge-base-with-cover.pdf"
+      - name: Prepare output directory
+        run: mkdir -p exports
 
-          writer = PdfWriter()
-          writer.append(cover)  # cover can be 1 or multiple pages
-          writer.append(body)
-          writer.write(out)
-          print(f"Created {out}")
-          PY
-        # pypdf supports merging by appending PDFs via PdfWriter.append() and writing the output. [2](https://bing.com/search?q=material+for+mkdocs+custom+404+page+setup)[3](https://squidfunk.github.io/mkdocs-material/customization/)
+      - name: Build DOCX (Pandoc in Docker)
+        uses: docker://${{ inputs.pandoc_image }}
+        with:
+          args: >-
+            combined.md
+            --from=gfm
+            --standalone
+            --resource-path=.:exports:exports/media:docs:docs/external:docs/assets
+            --output=exports/${{ inputs.output_basename }}.docx
 
-      - name: Upload release assets (keep ALL artefacts)
-        uses: softprops/action-gh-release@v2
+      - name: Build PDF (Pandoc + XeLaTeX, KB defaults)
+        uses: docker://${{ inputs.pandoc_image }}
         with:
-          files: |
-            exports/knowledge-base.pdf
-            exports/knowledge-base-with-cover.pdf
-            exports/knowledge-base.docx
+          args: >-
+            combined.md
+            --from=gfm
+            --standalone
+            --toc
+            --number-sections
+            --pdf-engine=xelatex
+            -V papersize=${{ inputs.papersize }}
+            -V geometry:margin=${{ inputs.margin }}
+            -V fontsize=${{ inputs.fontsize }}
+            -V mainfont=${{ inputs.mainfont }}
+            -V sansfont=${{ inputs.sansfont }}
+            -V monofont=${{ inputs.monofont }}
+            --resource-path=.:exports:exports/media:docs:docs/external:docs/assets
+            --output=exports/${{ inputs.output_basename }}.pdf
+
+      - name: Upload export artifacts (PDF + DOCX)
+        uses: actions/upload-artifact@v4
+        with:
+          name: release-export
+          path: |
+            exports/${{ inputs.output_basename }}.pdf
+            exports/${{ inputs.output_basename }}.docx
+          if-no-files-found: error