fix normalize path err, if path does not contain . or ~ at the beginn…

…ing -> returns path as is

.gitignore

@@ -16,4 +16,5 @@
 # vendor/
 
 #other
-cfg.yaml
+cfg.yaml
+.DS_Store

pkg/filesystem/common.go

@@ -1,6 +1,7 @@
 package filesystem
 
 import (
+	"errors"
 	"os"
 	"path"
 )
@@ -12,6 +13,11 @@ type (
 )
 
 func NormalizePath(dir string) (newPath string, err error) {
+	if len(dir) == 0 {
+		err = errors.New("unable to normalize empty path")
+		return
+	}
+
 	if dir[0] == '~' {
 		var homeDir string
 		homeDir, err = os.UserHomeDir()
@@ -20,14 +26,16 @@ func NormalizePath(dir string) (newPath string, err error) {
 		}
 
 		newPath = path.Join(homeDir, dir[1:])
-	} else if dir[0] == '.' {
+	} else if dir[0] == '.' && (len(dir) == 1 || dir[2] == '/') {
 		var curPath string
 		curPath, err = os.Getwd()
 		if err != nil {
 			return
 		}
 
 		newPath = path.Join(curPath, dir[1:])
+	} else {
+		newPath = dir
 	}
 
 	return