refactor: 整理结构和 maker 构建方式

internal/controller/installer/installer.go

@@ -9,7 +9,8 @@ import (
 )
 
 type installer struct {
-	target string
+	workdir string
+	target  string
 }
 
 func (i *installer) targetOK(ctx context.Context) error {
@@ -34,6 +35,6 @@ func (i *installer) targetOK(ctx context.Context) error {
 	return nil
 }
 
-func NewInstaller(target string) *installer {
-	return &installer{target: target}
+func NewInstaller(workdir, target string) *installer {
+	return &installer{workdir: workdir, target: target}
 }