doc: Add latex to generate pdf

Add latex to generate pdf.

Signed-off-by: divya pillai <divya.pillai@nordicsemi.no>

Author: divipillai

.github/workflows/doc-build.yml

@@ -71,6 +71,7 @@ jobs:
         run: |
           doxygen
           sphinx-build -M html . build
+          make latex
 
       - name: Check version
         run: |
@@ -99,6 +100,7 @@ jobs:
             echo "${{ github.event.number }}" > pr.txt
           else
             ARCHIVE="legacy-addon-serial_modem-${VERSION}.zip"
+            PDF="legacy-addon-serial_modem-${VERSION}.pdf"
             echo "publish2 main ${VERSION} ${ARCHIVE}" > "${MONITOR}"
           fi
 
@@ -107,6 +109,8 @@ jobs:
           mv "${ARCHIVE}" "$PUBLISH"
           popd
 
+          cp "doc/build/latex/ncs-serial-modem.pdf" "$PUBLISH/${PDF}"
+
           mv "${MONITOR}" "$PUBLISH"
           if [[ -f pr.txt ]]; then mv pr.txt "$PUBLISH"; fi
 

doc/conf.py

@@ -54,3 +54,19 @@
 .. include:: /links.txt
 .. include:: /shortcuts.txt
 """
+
+# -- Options for LaTeX output -------------------------------------------------
+
+latex_engine = 'xelatex'
+
+latex_elements = {
+    'papersize': 'a4paper',
+    'pointsize': '11pt',
+}
+
+latex_documents = [
+    ('index', 'ncs-serial-modem.tex', f'{project} Documentation',
+     author, 'manual'),
+]
+
+figure_align = 'H'