release.py: use dateutil's parser

Makes code much easier and fix a crash if the commit date includes a negative
timezone offset (like 'Mon Oct 14 13:13:03 2013 -0400').

diff --git a/release.py b/release.py
index 5b132406432a746b21c897922b94fae85ea78a70..59919e8f910d33275be1ece4e8815e6fe96c93be 100755 (executable)
--- a/release.py
+++ b/release.py
@@ -1,13 +1,12 @@
 #!/usr/bin/env python
 
 import os
-import re
 import urllib
 import csv
 import datetime
-import time
 from string import Template
 from optparse import OptionParser
+import dateutil.parser
 
 last_tag_pattern = 'EMPATHY_3_10*'
 upload_server = 'master.gnome.org'
@@ -172,9 +171,9 @@ class Project:
                commit_str = self.exec_cmd('git show %s' % (self.last_tag))
                for line in commit_str.splitlines():
                        if line.startswith('Date:'):
-                               time_str = line[5:line.rfind('+')].strip()
-                               t = time.strptime(time_str)
-                               last_tag_date = time.strftime('%Y-%m-%d', t)
+                               time_str = line[5:]
+                               t = dateutil.parser.parse(time_str)
+                               last_tag_date = t.strftime('%Y-%m-%d')
                                break
 
                query = 'http://bugzilla.gnome.org/buglist.cgi?' \