enhance: get count of changed file (without untracked) directly (#316)

src/Commands/CountLocalChangesWithoutUntracked.cs

@@ -0,0 +1,26 @@
+using System;
+
+namespace SourceGit.Commands
+{
+    public class CountLocalChangesWithoutUntracked : Command
+    {
+        public CountLocalChangesWithoutUntracked(string repo)
+        {
+            WorkingDirectory = repo;
+            Context = repo;
+            Args = "status -uno --ignore-submodules=dirty --porcelain";
+        }
+
+        public int Result()
+        {
+            var rs = ReadToEnd();
+            if (rs.IsSuccess)
+            {
+                var lines = rs.StdOut.Split('\n', StringSplitOptions.RemoveEmptyEntries);
+                return lines.Length;
+            }
+
+            return 0;
+        }
+    }
+}