From 8dc7ac8623de221b6acb7282052dcba9b32ec21a Mon Sep 17 00:00:00 2001
From: Nate McMaster <nate.mcmaster@microsoft.com>
Date: Fri, 4 Nov 2016 13:34:19 -0700
Subject: [PATCH] Add DOTNET_USE_POLLING_FILE_WATCHER to help output

---
 src/Microsoft.DotNet.Watcher.Tools/CommandLineOptions.cs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/Microsoft.DotNet.Watcher.Tools/CommandLineOptions.cs b/src/Microsoft.DotNet.Watcher.Tools/CommandLineOptions.cs
index 61064652aa..ab120038c5 100644
--- a/src/Microsoft.DotNet.Watcher.Tools/CommandLineOptions.cs
+++ b/src/Microsoft.DotNet.Watcher.Tools/CommandLineOptions.cs
@@ -28,6 +28,13 @@ namespace Microsoft.DotNet.Watcher
                 Error = stderr,
                 AllowArgumentSeparator = true,
                 ExtendedHelpText = @"
+Environment variables:
+
+  DOTNET_USE_POLLING_FILE_WATCHER
+  When set to '1' or 'true', dotnet-watch will poll the file system for
+  changes. This is required for some file systems, such as network shares,
+  Docker mounted volumes, and other virtual file systems.
+
 Remarks:
   The special option '--' is used to delimit the end of the options and
   the beginning of arguments that will be passed to the child dotnet process.