fix(go): return empty map when current go module has no deps (#127)

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

* fix(go): read modfile correct; use modfile.ModulePath to get module path

* chore(go): wrap error

* chore(go): use %w to wrap error instead of %s

Author: acehinnnqru

go.mod

@@ -4,7 +4,6 @@ go 1.23.4
 
 require (
 	github.com/Knetic/govaluate v3.0.1-0.20171022003610-9aa49832a739+incompatible
-	github.com/bytedance/sonic v1.14.1
 	github.com/cloudwego/eino v0.3.52
 	github.com/cloudwego/eino-ext/components/model/ark v0.1.16
 	github.com/cloudwego/eino-ext/components/model/claude v0.1.1
@@ -43,6 +42,7 @@ require (
 	github.com/bahlo/generic-list-go v0.2.0 // indirect
 	github.com/buger/jsonparser v1.1.1 // indirect
 	github.com/bytedance/gopkg v0.1.3 // indirect
+	github.com/bytedance/sonic v1.14.1 // indirect
 	github.com/bytedance/sonic/loader v0.3.0 // indirect
 	github.com/cenkalti/backoff/v4 v4.3.0 // indirect
 	github.com/cloudwego/base64x v0.1.6 // indirect

lang/golang/parser/parser.go

@@ -99,10 +99,12 @@ func (p *GoParser) collectGoMods(startDir string) error {
 		if err != nil || !strings.HasSuffix(path, "go.mod") {
 			return nil
 		}
-		name, _, err := getModuleName(path)
+
+		name, err := getModuleName(path)
 		if err != nil {
-			return err
+			return fmt.Errorf("failed to get module name: %w", err)
 		}
+
 		rel, err := filepath.Rel(p.homePageDir, filepath.Dir(path))
 		if err != nil {
 			return fmt.Errorf("module path %v is not in the repo", path)
@@ -154,6 +156,10 @@ 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

@@ -15,14 +15,11 @@
 package parser
 
 import (
-	"bufio"
-	"bytes"
 	"container/list"
 	"fmt"
 	"go/ast"
 	"go/build"
 	"go/types"
-	"io"
 	"os"
 	"os/exec"
 	"path"
@@ -32,6 +29,7 @@ import (
 
 	"github.com/Knetic/govaluate"
 	. "github.com/cloudwego/abcoder/lang/uniast"
+	"golang.org/x/mod/modfile"
 )
 
 func shouldIgnoreDir(path string) bool {
@@ -152,33 +150,27 @@ func getPackageAlias(importPath string) string {
 	return alias
 }
 
-func getModuleName(modFilePath string) (string, []byte, error) {
-	file, err := os.Open(modFilePath)
+func hasNoDeps(modFilePath string) bool {
+	content, err := os.ReadFile(modFilePath)
 	if err != nil {
-		return "", nil, fmt.Errorf("failed to open file: %v", err)
+		return false
 	}
-	defer file.Close()
-	data, err := io.ReadAll(file)
+
+	modf, err := modfile.Parse(modFilePath, content, nil)
 	if err != nil {
-		return "", nil, fmt.Errorf("failed to read file: %v", err)
-	}
-	scanner := bufio.NewScanner(bytes.NewBuffer(data))
-	for scanner.Scan() {
-		line := scanner.Text()
-		if strings.HasPrefix(line, "module") {
-			// Assuming 'module' keyword is followed by module name
-			parts := strings.Split(line, " ")
-			if len(parts) > 1 {
-				return parts[1], data, nil
-			}
-		}
+		return false
 	}
 
-	if err := scanner.Err(); err != nil {
-		return "", data, fmt.Errorf("failed to scan file: %v", err)
+	return len(modf.Require) == 0
+}
+
+func getModuleName(modFilePath string) (string, error) {
+	content, err := os.ReadFile(modFilePath)
+	if err != nil {
+		return "", fmt.Errorf("failed to read file: %w", err)
 	}
 
-	return "", data, nil
+	return modfile.ModulePath(content), nil
 }
 
 func isGoBuiltins(name string) bool {