Check file start not package location

Author: JoelSpeed

pkg/analysis/statusoptional/testdata/src/a/b.go

@@ -1,3 +1,22 @@
+/*
+Copyright 2025 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+	http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
 package a
 
-type StructFromAnotherFile struct{}
+type StructFromAnotherFile struct {
+	// OptionalStringField is a string field that is optional.
+	// +optional
+	OptionalStringField string `json:"optionalStringField,omitempty"`
+}

pkg/analysis/utils/utils.go

@@ -106,7 +106,7 @@ func getFilesForType(pass *analysis.Pass, ident *ast.Ident) (*token.File, *ast.F
 	tokenFile := pass.Fset.File(namedType.Obj().Pos())
 
 	for _, astFile := range pass.Files {
-		if astFile.Package == token.Pos(tokenFile.Base()) {
+		if astFile.FileStart == token.Pos(tokenFile.Base()) {
 			return tokenFile, astFile
 		}
 	}