Make standard library detection opt-out

ruff_lsp/server.py

@@ -885,13 +885,15 @@ def document_from_kind(uri: str, kind: str) -> Document:
             return Document.from_cell_or_text_uri(uri)
 
     document_path = _uri_to_fs_path(params.text_document.uri)
-    if utils.is_stdlib_file(document_path):
+    settings = _get_settings_by_document(document_path)
+
+    if settings.get("ignoreStandardLibrary", True) and utils.is_stdlib_file(
+        document_path
+    ):
         # Don't format standard library files.
         # Publishing empty list clears the entry.
         return None
 
-    settings = _get_settings_by_document(document_path)
-
     if settings["organizeImports"]:
         # Generate the "Ruff: Organize Imports" edit
         for kind in (
@@ -1758,7 +1760,7 @@ async def _run_check_on_document(
     only: Sequence[str] | None = None,
 ) -> ExecutableResult | None:
     """Runs the Ruff `check` subcommand  on the given document source."""
-    if document.is_stdlib_file():
+    if settings.get("ignoreStandardLibrary", True) and document.is_stdlib_file():
         log_warning(f"Skipping standard library file: {document.path}")
         return None
 
@@ -1820,11 +1822,12 @@ async def _run_check_on_document(
 
 async def _run_format_on_document(document: Document) -> ExecutableResult | None:
     """Runs the Ruff `format` subcommand on the given document source."""
-    if document.is_stdlib_file():
+    settings = _get_settings_by_document(document.path)
+
+    if settings.get("ignoreStandardLibrary", True) and document.is_stdlib_file():
         log_warning(f"Skipping standard library file: {document.path}")
         return None
 
-    settings = _get_settings_by_document(document.path)
     executable = _find_ruff_binary(settings, VERSION_REQUIREMENT_FORMATTER)
     argv: list[str] = [
         "format",

ruff_lsp/settings.py

@@ -46,6 +46,9 @@ class UserSettings(TypedDict, total=False):
     format: Format
     """Settings specific to format capabilities."""
 
+    ignoreStandardLibrary: bool
+    """Whether to ignore files in the standard library when running Ruff."""
+
     # Deprecated: use `lint.args` instead.
     args: list[str]
     """Additional command-line arguments to pass to `ruff check`."""