refined autoremove support

code/utils/utils.py

@@ -1,6 +1,5 @@
 import os
 from datetime import datetime
-from dateutil.relativedelta import relativedelta
 from flask import current_app as app
 import requests
 import re
@@ -122,12 +121,14 @@ def file_age(path):
         os.stat(path).st_mtime
     )
     diff = now - then
-    rdiff = relativedelta(now, then)
-    return diff, "%dM %02dD %02d:%02dH" % (
-        rdiff.years * 12 + rdiff.months,
-        rdiff.days,
-        rdiff.hours,
-        rdiff.minutes
+    return (
+        diff,
+        "%03d d %s"%(
+            diff.days,
+            datetime.utcfromtimestamp(
+                diff.seconds
+            ).strftime('%H:%M:%S')
+        )
     )