server-mode: Add infrastructure to watch the filesystem

Enable the server to watch for filesystem changes. This patch includes
* The infrastructure for the file watching
* makes that infrastructure available to cmServerProtocols
* Resets the filesystemwatchers on "configure"

1 files changed, 28 insertions, 0 deletions

diff --git a/Source/cmFileMonitor.h b/Source/cmFileMonitor.h
new file mode 100644
index 0000000000..e05f48dc47
--- /dev/null
+++ b/Source/cmFileMonitor.h
@@ -0,0 +1,28 @@
+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing for details.  */
+#pragma once
+
+#include <functional>
+#include <string>
+#include <vector>
+
+#include "cm_uv.h"
+
+class cmRootWatcher;
+
+class cmFileMonitor
+{
+public:
+  cmFileMonitor(uv_loop_t* l);
+  ~cmFileMonitor();
+
+  using Callback = std::function<void(const std::string&, int, int)>;
+  void MonitorPaths(const std::vector<std::string>& paths, Callback cb);
+  void StopMonitoring();
+
+  std::vector<std::string> WatchedFiles() const;
+  std::vector<std::string> WatchedDirectories() const;
+
+private:
+  cmRootWatcher* Root;
+};