From 5fb2fbd33c2a4e1cf3819e2d76be543f8aecb3c2 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Mon, 1 Aug 2016 10:30:10 -0700
Subject: [PATCH] Provide `realpath` for module resolution in LSHost

---
 src/server/editorServices.ts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/server/editorServices.ts b/src/server/editorServices.ts
index 6a2beccc243..47e6af53e4d 100644
--- a/src/server/editorServices.ts
+++ b/src/server/editorServices.ts
@@ -115,6 +115,9 @@ namespace ts.server {
                 readFile: fileName => this.host.readFile(fileName),
                 directoryExists: directoryName => this.host.directoryExists(directoryName)
             };
+            if (this.host.realpath) {
+                this.moduleResolutionHost.realpath = path => this.host.realpath(path);
+            }
         }
 
         private resolveNamesWithLocalCache<T extends Timestamped & { failedLookupLocations: string[] }, R>(