Add Status.IsUntracked function

Signed-off-by: kuba-- <[e-mail]>

status.go

···
 package git
 
-import "fmt"
-import "bytes"
+import (
+	"bytes"
+	"fmt"
+	"path/filepath"
+)
 
 // Status represents the current status of a Worktree.
 // The key of the map is the path of the file.
···
 	}
 
 	return s[path]
+}
+
+// IsUntracked checks if file for given path is 'Untracked'
+func (s Status) IsUntracked(path string) bool {
+	stat, ok := (s)[filepath.ToSlash(path)]
+	return ok && stat.Worktree == Untracked
 }
 
 // IsClean returns true if all the files aren't in Unmodified status.

worktree.go

···
 				return err
 			}
 		} else {
-			// check if file is 'Untracked'
-			s, ok := (status)[filepath.ToSlash(path)]
-			if ok && s.Worktree == Untracked {
+			if status.IsUntracked(path) {
 				if err := w.Filesystem.Remove(path); err != nil {
 					return err
 				}