fix: remove duplicate files when building wheel

Signed-off-by: Frost Ming <me@frostming.com>

src/pdm/backend/editable.py

@@ -35,8 +35,7 @@ def pdm_build_initialize(self, context: Context) -> None:
 
     def pdm_build_update_files(self, context: Context, files: dict[str, Path]) -> None:
         packages: list[str] = context.config.convert_package_paths()["packages"]
-        package_dir = context.config.build_config.package_dir
-        proxied = {os.path.join(package_dir, p.replace(".", "/")) for p in packages}
+        proxied = {p.replace(".", "/") for p in packages}
         for relpath in list(files):
             if os.path.splitext(relpath)[1] in (".py", ".pyc", ".pyo"):
                 # All .py[cod] files are proxied

src/pdm/backend/wheel.py

@@ -20,6 +20,7 @@
 from pdm.backend.base import Builder
 from pdm.backend.hooks import Context
 from pdm.backend.hooks.setuptools import SetuptoolsBuildHook
+from pdm.backend.structures import FileMap
 from pdm.backend.utils import (
     expand_vars,
     get_abi_tag,
@@ -122,13 +123,23 @@ def prepare_metadata(self, metadata_directory: str) -> Path:
         self.initialize(context)
         return self._write_dist_info(Path(metadata_directory))
 
-    def get_files(self, context: Context) -> Iterable[tuple[str, Path]]:
+    def _collect_files(self, context: Context) -> FileMap:
         package_dir = self.config.build_config.package_dir
-        for relpath, path in super().get_files(context):
+        result = FileMap()
+
+        def clean_prefix(relpath: str) -> str:
             # remove the package-dir part from the relative paths
             if package_dir and relpath.startswith(package_dir + "/"):
                 relpath = relpath[len(package_dir) + 1 :]
-            yield relpath, path
+            return relpath
+
+        result.update(
+            (clean_prefix(k), v) for k, v in super()._collect_files(context).items()
+        )
+        return result
+
+    def get_files(self, context: Context) -> Iterable[tuple[str, Path]]:
+        yield from super().get_files(context)
         yield from self._get_metadata_files(context)
         yield from self._get_wheel_data(context)