From 7bad99b0d3fb50853937d99cd68eb340a0975156 Mon Sep 17 00:00:00 2001
From: Aleix Pol <aleixpol@kde.org>
Date: Wed, 11 Jan 2017 19:08:04 +0100
Subject: [PATCH] cmake-server: Do not try watching subdirectories with empty
 names

`cmsys::SystemTools::SplitPath` will return empty segments on paths
where there's duplicaded consequent slashes (e.g.  `/home/dir/my//stuff`).
This makes the cmFileWatcher choke.  Teach cmFileMonitor to skip these
empty segments.

Closes: #16531
---
 Source/cmFileMonitor.cxx | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Source/cmFileMonitor.cxx b/Source/cmFileMonitor.cxx
index ea37683bb..815de95e7 100644
--- a/Source/cmFileMonitor.cxx
+++ b/Source/cmFileMonitor.cxx
@@ -331,6 +331,9 @@ void cmFileMonitor::MonitorPaths(const std::vector<std::string>& paths,
           rootSegment)); // Can not be both filename and root part of the path!
 
       const std::string& currentSegment = pathSegments[i];
+      if (currentSegment.empty()) {
+        continue;
+      }
 
       cmIBaseWatcher* nextWatcher = currentWatcher->Find(currentSegment);
       if (!nextWatcher) {