fix: handle paths with escaped spaces in Cargo dep-info files

native_toolchain_rust/lib/src/dependency_discoverer.dart

@@ -21,9 +21,27 @@ interface class DependencyDiscoverer {
   /// coverage for incremental rebuilds.
   Iterable<Uri> discover(String dependencyFilePath) {
     logger.fine('Discovering dependencies in $dependencyFilePath');
-    return File(dependencyFilePath)
-        .readAsLinesSync()
-        .expand((line) => line.trim().split(' ').skip(1))
-        .map(path.toUri);
+    final rawContent = File(dependencyFilePath).readAsStringSync();
+    // Normalize line continuations (backslash followed by newline).
+    final normalized = rawContent.replaceAll(RegExp(r'\\\r?\n'), ' ');
+    final result = <Uri>[];
+    for (final line in normalized.split(RegExp(r'\r?\n'))) {
+      final trimmed = line.trim();
+      if (trimmed.isEmpty) continue;
+      final colonIndex = trimmed.indexOf(': ');
+      final depsString = colonIndex != -1
+          ? trimmed.substring(colonIndex + 2)
+          : trimmed;
+      // Cargo/Make dep-info escapes spaces in file paths with a backslash ('\ ').
+      // Split only on whitespace that is not preceded by a backslash.
+      final rawTokens = depsString.split(RegExp(r'(?<!\\) +'));
+      for (final token in rawTokens) {
+        final unescaped = token.replaceAll(r'\ ', ' ').trim();
+        if (unescaped.isNotEmpty) {
+          result.add(path.toUri(unescaped));
+        }
+      }
+    }
+    return result;
   }
 }

native_toolchain_rust/test/dependency_discoverer_test.dart

@@ -78,6 +78,30 @@ target/debug/librust_lib.a: /path/to/some/other/file.rs
       expect(dependencies, isNot(contains(path.toUri(dependencyFilePath))));
     });
 
+    test('discover correctly parses paths with escaped spaces and '
+        'line continuations', () {
+      final dependencyFilePath = path.join(tempDir.path, 'test.d');
+      File(dependencyFilePath).writeAsStringSync(
+        'target/debug/librust_lib.a: src/lib.rs '
+        r'C:\Users\John\ Doe\lib.rs'
+        '\n'
+        'target/debug/librust_lib.a: /path/with\\ space/mod.rs \\\n'
+        '  /continuation/path.rs',
+      );
+
+      final dependencies = dependencyDiscoverer.discover(dependencyFilePath);
+
+      expect(
+        dependencies,
+        unorderedEquals([
+          path.toUri('src/lib.rs'),
+          path.toUri(r'C:\Users\John Doe\lib.rs'),
+          path.toUri('/path/with space/mod.rs'),
+          path.toUri('/continuation/path.rs'),
+        ]),
+      );
+    });
+
     test(
       'discover throws an exception if the dependency file is not found',
       () {