feature: build script for drawings

src/build_drawings.py

@@ -0,0 +1,61 @@
+# 2026, DARC e. V., Matthias Jung (DL9MJ)
+import tempfile
+import os
+import pathlib
+
+def build_drawing(id):
+
+    # Create build directory:
+    with tempfile.TemporaryDirectory(prefix="build_", dir="./") as tmp:
+        build_path = pathlib.Path(tmp)
+
+        # Read the LaTeX drawing file:
+        drawings_path = pathlib.Path("contents/drawings")
+        drawing = drawings_path / f"{id}.tex"
+        if not drawing.is_file():
+            print(f"Error: drawing file '{drawing}' not found.")
+            return False
+        with drawing.open("r", encoding="utf-8") as file:
+            latex = file.read()
+    
+        # Workaround, if the picture contains a document class it should be ignored:
+        if ("\\begin{document}" in latex or "\\begin{table}" in latex): 
+            print(f"Error: drawing file '{drawing}' contains a document environment.")
+            return False
+
+        # Write the include file:
+        img_path = build_path / "img"
+        img_path.mkdir(parents=True, exist_ok=True)
+        with (img_path / f"{id}include.tex").open("w") as file:
+            file.write(latex)
+
+        # Write the auxilary LaTeX file:
+        aux_file = build_path / f"{id}.tex"
+        
+        with aux_file.open("w", encoding="utf-8") as file:
+            file.write(f"\\documentclass{{FiftyOhm}}\\DARCimageOnly{{9cm}}{{{id}include}}")
+
+        # Symlink photos, so LaTeX can access these assets to render into graphics.
+        photos_path = pathlib.Path("contents/photos")
+        foto_link = build_path / "foto"
+        foto_link2 = build_path / "img/foto"
+        if not foto_link.is_symlink():
+            foto_link.symlink_to(photos_path)
+        if not foto_link2.is_symlink():
+            foto_link2.symlink_to(photos_path)
+
+        # Build the picture:
+        os.system(f"latexmk -lualatex {aux_file}")
+        
+        # Convert the PDF to SVG and store it in the drawings folder:
+        os.system(f"pdftocairo -svg {build_path}/{id}.pdf - > {drawings_path}/{id}.svg")
+
+        return True
+
+print("Build SVG from LaTeX")
+print("Please type number of drawing:")
+
+id = int(input())
+
+print(f"Building picture {id}. This might take a while ... ") 
+build_drawing(id)