From 2252b17f28346bfaff94d1b916758cf5fe2fe379 Mon Sep 17 00:00:00 2001
From: zhengbli <zhengbli@microsoft.com>
Date: Thu, 19 May 2016 15:59:23 -0700
Subject: [PATCH] avoid using `sys` in editorServices.ts

---
 src/server/editorServices.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/server/editorServices.ts b/src/server/editorServices.ts
index 97a322f9598..62c8bf3ea1c 100644
--- a/src/server/editorServices.ts
+++ b/src/server/editorServices.ts
@@ -1300,7 +1300,7 @@ namespace ts.server {
                 }
                 else {
                     const oldFileNames = project.compilerService.host.roots.map(info => info.fileName);
-                    const newFileNames = ts.filter(projectOptions.files, sys.fileExists);
+                    const newFileNames = ts.filter(projectOptions.files, f => this.host.fileExists(f));
                     const fileNamesToRemove = oldFileNames.filter(f => newFileNames.indexOf(f) < 0);
                     const fileNamesToAdd = newFileNames.filter(f => oldFileNames.indexOf(f) < 0);