Use the new error structure

crates/ruff/src/linter.rs

@@ -274,7 +274,6 @@ pub fn add_noqa_to_path(
  source_type: PySourceType,
  settings: &Settings,
 ) -> Result<usize> {
- // Read the file from disk.
  let contents = source_kind.source_code();
 
  // Tokenize once.

crates/ruff_cli/src/commands/add_noqa.rs

@@ -57,10 +57,13 @@ pub(crate) fn add_noqa(
  .and_then(|parent| package_roots.get(parent))
  .and_then(|package| *package);
  let settings = resolver.resolve(path, pyproject_config);
- let Ok(LintSource(source_kind)) = LintSource::try_from_path(path, source_type) else {
- // TODO(dhruvmanila): Display the error to the user.
- error!("Failed to extract source from {}", path.display());
- return None;
+ let LintSource(source_kind) = match LintSource::try_from_path(path, source_type) {
+ Ok(Some(source)) => source,
+ Ok(None) => return None,
+ Err(e) => {
+ error!("Failed to extract source from {}: {e}", path.display());
+ return None;
+ }
  };
  match add_noqa_to_path(path, package, &source_kind, source_type, settings) {
  Ok(count) => Some(count),