improve date parsing for numerous new date formats

improve date parsing for numerous new date formats

Add lots of new date formats
Formats without year, month, or day default to current
Strip leading and trailing whitespace

--- a/mercurial/util.py	Wed Dec 06 13:13:27 2006 -0600
+++ b/mercurial/util.py	Wed Dec 06 13:13:31 2006 -0600
@@ -72,8 +72,29 @@
         raise Abort("decoding near '%s': %s!\n" % (sub, inst))
 
 # used by parsedate
-defaultdateformats = ('%Y-%m-%d %H:%M:%S', '%Y-%m-%d %H:%M',
-                      '%a %b %d %H:%M:%S %Y')
+defaultdateformats = (
+    '%Y-%m-%d %H:%M:%S',
+    '%Y-%m-%d %I:%M:%S%p',
+    '%Y-%m-%d %H:%M',
+    '%Y-%m-%d %I:%M%p',
+    '%Y-%m-%d',
+    '%m-%d',
+    '%m/%d',
+    '%m/%d/%y',
+    '%m/%d/%Y',
+    '%a %b %d %H:%M:%S %Y',
+    '%a %b %d %I:%M:%S%p %Y',
+    '%b %d %H:%M:%S %Y',
+    '%b %d %I:%M:%S%p',
+    '%b %d %H:%M',
+    '%b %d %I:%M%p',
+    '%b %d %Y',
+    '%b %d',
+    '%H:%M:%S',
+    '%I:%M:%SP',
+    '%H:%M',
+    '%I:%M%p',
+)
 
 class SignalInterrupt(Exception):
     """Exception raised on SIGTERM and SIGHUP."""
@@ -1052,6 +1073,18 @@
         offset = - 3600 * (tz / 100) - 60 * (tz % 100)
     else:
         date, offset = string, None
+
+    # add missing elements
+    if '%y' not in format.lower():
+        date += "@" + datestr(makedate(), "%Y", False)
+        format += "@%Y"
+    if '%m' not in format and '%b' not in format:
+        date += "@" + datestr(makedate(), "%m", False)
+        format += "@%m"
+    if '%d' not in format:
+        date += "@" + datestr(makedate(), "%d", False)
+        format += "@%d"
+
     timetuple = time.strptime(date, format)
     localunixtime = int(calendar.timegm(timetuple))
     if offset is None:
@@ -1070,6 +1103,7 @@
         return 0, 0
     if not formats:
         formats = defaultdateformats
+    string = string.strip()
     try:
         when, offset = map(int, string.split(' '))
     except ValueError: