feat(go): return empty map when current go module has no deps

Author: acehinnnqru

lang/golang/parser/parser.go

@@ -154,6 +154,10 @@ func getDeps(dir string) (map[string]string, error) {
 		return nil, fmt.Errorf("failed to execute 'go mod tidy', err: %v, output: %s", err, string(output))
 	}
 
+	if hasNoDeps(filepath.Join(dir, "go.mod")) {
+		return map[string]string{}, nil
+	}
+
 	cmd = exec.Command("go", "list", "-json", "all")
 	cmd.Dir = dir
 	output, err = cmd.CombinedOutput()

lang/golang/parser/utils.go

@@ -32,6 +32,7 @@ import (
 
 	"github.com/Knetic/govaluate"
 	. "github.com/cloudwego/abcoder/lang/uniast"
+	"golang.org/x/mod/modfile"
 )
 
 func shouldIgnoreDir(path string) bool {
@@ -152,6 +153,15 @@ func getPackageAlias(importPath string) string {
 	return alias
 }
 
+func hasNoDeps(modFilePath string) bool {
+	mod, err := modfile.Parse(modFilePath, nil, nil)
+	if err != nil {
+		return false
+	}
+
+	return len(mod.Require) == 0
+}
+
 func getModuleName(modFilePath string) (string, []byte, error) {
 	file, err := os.Open(modFilePath)
 	if err != nil {