merge upstream

pelican/utils.py

@@ -5,6 +5,7 @@ import re
 import pytz
 import shutil
 import logging
+from collections import defaultdict
 
 from codecs import open as _open
 from datetime import datetime
@@ -222,9 +223,9 @@ def files_changed(path, extensions):
         """Return the last time files have been modified"""
         for root, dirs, files in os.walk(path):
             dirs[:] = [x for x in dirs if x[0] != '.']
-            for file in files:
-                if any(file.endswith(ext) for ext in extensions):
-                    yield os.stat(os.path.join(root, file)).st_mtime
+            for f in files:
+                if any(f.endswith(ext) for ext in extensions):
+                    yield os.stat(os.path.join(root, f)).st_mtime
 
     global LAST_MTIME
     mtime = max(file_times(path))
@@ -234,6 +235,21 @@ def files_changed(path, extensions):
     return False
 
 
+FILENAMES_MTIMES = defaultdict(int)
+
+
+def file_changed(filename):
+    mtime = os.stat(filename).st_mtime
+    if FILENAMES_MTIMES[filename] == 0:
+        FILENAMES_MTIMES[filename] = mtime
+        return False
+    else:
+        if mtime > FILENAMES_MTIMES[filename]:
+            FILENAMES_MTIMES[filename] = mtime
+            return True
+        return False
+
+
 def set_date_tzinfo(d, tz_name=None):
     """ Date without tzinfo shoudbe utc.
     This function set the right tz to date that aren't utc and don't have