Add better error

Author: virtuald

src/semiwrap/makeplan.py

@@ -101,6 +101,10 @@ class ExtensionModule:
     install_path: pathlib.Path
 
 
+class PlanError(Exception):
+    pass
+
+
 def _split_ns(name: str) -> T.Tuple[str, str]:
     ns = ""
     idx = name.rfind("::")
@@ -150,7 +154,10 @@ def generate(self):
             if extension.ignore:
                 continue
 
-            yield from self._process_extension_module(package_name, extension)
+            try:
+                yield from self._process_extension_module(package_name, extension)
+            except Exception as e:
+                raise PlanError(f"{package_name} failed") from e
 
         # TODO: this conditional probably should be done in the build system instead
         # cannot build pyi files when cross-compiling