correct parent packet for gomod

tools/goctl/api/gogen/util.go

@@ -12,20 +12,46 @@ import (
 	"github.com/tal-tech/go-zero/core/collection"
 	"github.com/tal-tech/go-zero/tools/goctl/api/spec"
 	"github.com/tal-tech/go-zero/tools/goctl/api/util"
+	goctlutil "github.com/tal-tech/go-zero/tools/goctl/util"
 )
 
+const goModeIdentifier = "go.mod"
+
 func getParentPackage(dir string) (string, error) {
 	absDir, err := filepath.Abs(dir)
 	if err != nil {
 		return "", err
 	}
-	gopath := os.Getenv("GOPATH")
-	parent := path.Join(gopath, "src")
-	pos := strings.Index(absDir, parent)
-	if pos < 0 {
-		return "", fmt.Errorf("%s not in GOPATH %s directory", absDir, gopath)
+
+	var rootPath string
+	var tempPath = absDir
+	var hasGoMod = false
+	for {
+		tempPath = filepath.Dir(tempPath)
+		if goctlutil.FileExists(filepath.Join(tempPath, goModeIdentifier)) {
+			tempPath = filepath.Dir(tempPath)
+			rootPath = absDir[len(tempPath)+1:]
+			hasGoMod = true
+			break
+		}
+		if tempPath == string(filepath.Separator) {
+			break
+		}
 	}
-	return absDir[len(parent)+1:], nil
+	if !hasGoMod {
+		gopath := os.Getenv("GOPATH")
+		parent := path.Join(gopath, "src")
+		pos := strings.Index(absDir, parent)
+		if pos < 0 {
+			message := fmt.Sprintf("%s not in gomod project path, or not in GOPATH of %s directory", absDir, gopath)
+			println(message)
+			tempPath = filepath.Dir(absDir)
+			rootPath = absDir[len(tempPath)+1:]
+		} else {
+			rootPath = absDir[len(parent)+1:]
+		}
+	}
+	return rootPath, nil
 }
 
 func writeIndent(writer io.Writer, indent int) {