fix(go): incorrect id for dot-imported symbols (#122)

Author: AsterDY

lang/golang/parser/file.go

@@ -394,7 +394,15 @@ func (p *GoParser) parseASTNode(ctx *fileContext, node ast.Node, collect *collec
 		// 	return false
 		// }
 		if use, ok := ctx.pkgTypeInfo.Uses[expr]; ok {
-			id := NewIdentity(ctx.module.Name, ctx.pkgPath, callName)
+			pkg := use.Pkg()
+			if pkg == nil {
+				return true
+			}
+			mod, err := ctx.GetMod(pkg.Path())
+			if err != nil {
+				return true
+			}
+			id := NewIdentity(mod, pkg.Path(), use.Name())
 			dep := NewDependency(id, ctx.FileLine(expr))
 			// type name
 			if _, isNamed := use.(*types.TypeName); isNamed {

testdata/go/0_golang/merge/merge_ref.go

@@ -0,0 +1,30 @@
+// Copyright 2025 CloudWeGo 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
+//
+//     https://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 pkg
+
+import . "a.b/c/pkg/entity"
+
+var G2 = G1
+
+var I1 Integer
+
+type S MyStructD
+
+func CaseMergeRef() MyStruct {
+	_ = G1 + G2
+	return MyStruct{
+		MyStructD: MyStructD{},
+	}
+}