some changes

internal/worker/handle.go

@@ -10,11 +10,18 @@ import (
 	"gorm.io/gorm"
 )
 
+type Logger interface {
+	Write(line string)
+}
+
 type RootConfig struct {
 	Data struct {
 		Driver string `json:"driver"`
 		Path   string `json:"path"`
 	} `json:"data"`
+	Log struct {
+		Path string `json:"log_root_path"`
+	} `json:"log"`
 }
 
 type Function struct {
@@ -30,6 +37,9 @@ type FuncConfig struct {
 	Version string `json:"version"`
 	Entry   string `json:"entry"`
 	Runtime string `json:"runtime"`
+	Log     struct {
+		Output string `json:"output"`
+	} `json:"log"`
 }
 
 func LoadTreeConfig(root string) (*RootConfig, error) {
@@ -61,9 +71,18 @@ func OpenDB(cfg *RootConfig, root string) (*gorm.DB, error) {
 
 func FindFunction(db *gorm.DB, name, version string) (*Function, error) {
 	var f Function
-	if err := db.Where("function_name = ? AND version = ? AND deleted_at IS NULL", name, version).
-		First(&f).Error; err != nil {
-		return nil, err
+	if version == "latest" {
+		err := db.Where("function_name = ? AND deleted_at IS NULL", name).
+			Order("created_at DESC").
+			First(&f).Error
+		if err != nil {
+			return nil, err
+		}
+	} else {
+		if err := db.Where("function_name = ? AND version = ? AND deleted_at IS NULL", name, version).
+			First(&f).Error; err != nil {
+			return nil, err
+		}
 	}
 	return &f, nil
 }