remove duplicated code in goctl (#369)

tools/goctl/api/gogen/genconfig.go

@@ -1,15 +1,11 @@
 package gogen
 
 import (
-	"bytes"
 	"fmt"
 	"strings"
-	"text/template"
 
 	"github.com/tal-tech/go-zero/tools/goctl/api/spec"
-	"github.com/tal-tech/go-zero/tools/goctl/api/util"
 	"github.com/tal-tech/go-zero/tools/goctl/config"
-	ctlutil "github.com/tal-tech/go-zero/tools/goctl/util"
 	"github.com/tal-tech/go-zero/tools/goctl/util/format"
 	"github.com/tal-tech/go-zero/tools/goctl/vars"
 )
@@ -39,38 +35,24 @@ func genConfig(dir string, cfg *config.Config, api *spec.ApiSpec) error {
 		return err
 	}
 
-	fp, created, err := util.MaybeCreateFile(dir, configDir, filename+".go")
-	if err != nil {
-		return err
-	}
-	if !created {
-		return nil
-	}
-	defer fp.Close()
-
 	var authNames = getAuths(api)
 	var auths []string
 	for _, item := range authNames {
 		auths = append(auths, fmt.Sprintf("%s %s", item, jwtTemplate))
 	}
-
 	var authImportStr = fmt.Sprintf("\"%s/rest\"", vars.ProjectOpenSourceUrl)
-	text, err := ctlutil.LoadTemplate(category, configTemplateFile, configTemplate)
-	if err != nil {
-		return err
-	}
 
-	t := template.Must(template.New("configTemplate").Parse(text))
-	buffer := new(bytes.Buffer)
-	err = t.Execute(buffer, map[string]string{
-		"authImport": authImportStr,
-		"auth":       strings.Join(auths, "\n"),
+	return genFile(fileGenConfig{
+		dir:             dir,
+		subdir:          configDir,
+		filename:        filename + ".go",
+		templateName:    "configTemplate",
+		category:        category,
+		templateFile:    configTemplateFile,
+		builtinTemplate: configTemplate,
+		data: map[string]string{
+			"authImport": authImportStr,
+			"auth":       strings.Join(auths, "\n"),
+		},
 	})
-	if err != nil {
-		return err
-	}
-
-	formatCode := formatCode(buffer.String())
-	_, err = fp.WriteString(formatCode)
-	return err
 }