bug fixed & doc improved

xorm/README.md

@@ -30,8 +30,18 @@ to get help
 
 example:
 
+sqlite:
 `xorm reverse sqite3 test.db templates/goxorm`
 
+mysql:
+`xorm reverse mysql root:@/xorm_test?charset=utf8 templates/goxorm`
+
+mymysql:
+`xorm reverse mymysql xorm_test2/root/ templates/goxorm`
+
+postgres:
+`xorm reverse postgres "dbname=xorm_test sslmode=disable" templates/goxorm`
+
 will generated go files in `./model` directory
 
 ## Template and Config

xorm/reverse.go

@@ -53,6 +53,18 @@ type Tmpl struct {
 	Model   string
 }
 
+func dirExists(dir string) bool {
+	d, e := os.Stat(dir)
+	switch {
+	case e != nil:
+		return false
+	case !d.IsDir():
+		return false
+	}
+
+	return true
+}
+
 func runReverse(cmd *Command, args []string) {
 	num := checkFlags(cmd.Flags, args, printReversePrompt)
 	if num == -1 {
@@ -79,6 +91,7 @@ func runReverse(cmd *Command, args []string) {
 	var genDir string
 	var model string
 	if len(args) == 4 {
+
 		genDir, err = filepath.Abs(args[3])
 		if err != nil {
 			fmt.Println(err)
@@ -96,6 +109,11 @@ func runReverse(cmd *Command, args []string) {
 		return
 	}
 
+	if !dirExists(dir) {
+		logging.Error("Template %v path is not exist", dir)
+		return
+	}
+
 	var langTmpl LangTmpl
 	var ok bool
 	var lang string = "go"