1 files changed, 44 insertions, 0 deletions
diff --git a/powerline/lib/watcher/stat.py b/powerline/lib/watcher/stat.py
new file mode 100644
index 0000000..0c08971
--- /dev/null
+++ b/powerline/lib/watcher/stat.py
@@ -0,0 +1,44 @@
+# vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
+
+import os
+
+from threading import RLock
+
+from powerline.lib.path import realpath
+
+
+class StatFileWatcher(object):
+	def __init__(self):
+		self.watches = {}
+		self.lock = RLock()
+
+	def watch(self, path):
+		path = realpath(path)
+		with self.lock:
+			self.watches[path] = os.path.getmtime(path)
+
+	def unwatch(self, path):
+		path = realpath(path)
+		with self.lock:
+			self.watches.pop(path, None)
+
+	def is_watching(self, path):
+		with self.lock:
+			return realpath(path) in self.watches
+
+	def __call__(self, path):
+		path = realpath(path)
+		with self.lock:
+			if path not in self.watches:
+				self.watches[path] = os.path.getmtime(path)
+				return True
+			mtime = os.path.getmtime(path)
+			if mtime != self.watches[path]:
+				self.watches[path] = mtime
+				return True
+			return False
+
+	def close(self):
+		with self.lock:
+			self.watches.clear()