Refactor main to callable function

Preparation for `pyproject.toml` entry-point

scripts/boxes

@@ -28,25 +28,6 @@ except ImportError:
 import boxes.generators
 
 
-# __version__ = get_distribution('boxes').version
-
-
-def main():
-    # version = 'boxes.py v{}'.format(__version__)
-
-    if len(sys.argv) > 1 and sys.argv[1].startswith("--id="):
-        del sys.argv[1]
-    if len(sys.argv) == 1:
-        print_usage()
-    elif sys.argv[1] == '--list':
-        list_grouped_generators()
-    else:
-        name = sys.argv[1].lower()
-        if name.startswith("--generator="):
-            name = name[12:]
-        run_generator(name, sys.argv[2:])
-
-
 def print_usage():
     print(__doc__)
 
@@ -113,5 +94,19 @@ def generators_by_name():
     }
 
 
+def main() -> None:
+    if len(sys.argv) > 1 and sys.argv[1].startswith("--id="):
+        del sys.argv[1]
+    if len(sys.argv) == 1:
+        print_usage()
+    elif sys.argv[1] == '--list':
+        list_grouped_generators()
+    else:
+        name = sys.argv[1].lower()
+        if name.startswith("--generator="):
+            name = name[12:]
+        run_generator(name, sys.argv[2:])
+
+
 if __name__ == '__main__':
     main()

scripts/boxes2inkscape

@@ -147,8 +147,13 @@ class Boxes2INX:
             self.writeINX(name, box, path)
 
 
-if __name__ == "__main__":
+def main() -> None:
     if len(sys.argv) != 2:
         print("Usage: boxes2inkscape TARGETPATH")
+        return
     b = Boxes2INX()
     b.writeAllINX(sys.argv[1])
+
+
+if __name__ == "__main__":
+    main()

scripts/boxes2pot

@@ -138,9 +138,14 @@ msgstr ""
                 f.write('msgstr ""\n')
 
 
-if __name__ == "__main__":
+def main() -> None:
     if len(sys.argv) != 2:
         print("Usage: boxes2pot TARGETPATH")
+        return
     b = Boxes2pot()
     b.readBoxes()
     b.writePOT(sys.argv[1])
+
+
+if __name__ == "__main__":
+    main()

scripts/boxes_proxy.py

@@ -74,5 +74,9 @@ class boxesPyWrapper(inkex.GenerateExtension):
         return group
 
 
-if __name__ == '__main__':
+def main() -> None:
     boxesPyWrapper().run()
+
+
+if __name__ == '__main__':
+    main()

scripts/boxesserver

@@ -683,7 +683,7 @@ def get_qrcode(url, format):
     return image_bytes.getvalue()
 
 
-if __name__ == "__main__":
+def main() -> None:
     parser = argparse.ArgumentParser()
 
     parser.add_argument("--host", default="")
@@ -707,6 +707,10 @@ if __name__ == "__main__":
         fc.stop()
     httpd.server_close()
     print("BoxesServer stops.")
+
+
+if __name__ == "__main__":
+    main()
 else:
     boxserver = BServer(url_prefix='/boxes.py', static_url="https://florianfesti.github.io/boxes/static")
     application = boxserver.serve