Fix parsing of iso8601 timestamps with zero microseconds

Closes #282

CHANGES

@@ -3,6 +3,12 @@ Attic Changelog
 
 Here you can see the full list of changes between each Attic release.
 
+Version 0.16
+------------
+
+(bugfix release, released on X)
+- Fix parsing of iso 8601 timestamps with zero microseconds (#282)
+
 Version 0.15
 ------------
 

attic/archive.py

@@ -163,8 +163,7 @@ class Archive:
     @property
     def ts(self):
         """Timestamp of archive creation in UTC"""
-        t, f = self.metadata[b'time'].split('.', 1)
-        return datetime.strptime(t, '%Y-%m-%dT%H:%M:%S').replace(tzinfo=timezone.utc) + timedelta(seconds=float('.' + f))
+        return parse_timestamp(self.metadata[b'time'])
 
     def __repr__(self):
         return 'Archive(%r)' % self.name

attic/helpers.py

@@ -185,6 +185,14 @@ def to_localtime(ts):
     return datetime(*time.localtime((ts - datetime(1970, 1, 1, tzinfo=timezone.utc)).total_seconds())[:6])
 
 
+def parse_timestamp(timestamp):
+    """Parse a ISO 8601 timestamp string"""
+    if '.' in timestamp:  # microseconds might not be pressent
+        return datetime.strptime(timestamp, '%Y-%m-%dT%H:%M:%S.%f').replace(tzinfo=timezone.utc)
+    else:
+        return datetime.strptime(timestamp, '%Y-%m-%dT%H:%M:%S').replace(tzinfo=timezone.utc)
+
+
 def update_excludes(args):
     """Merge exclude patterns from files with those on command line.
     Empty lines and lines starting with '#' are ignored, but whitespace

attic/testsuite/helpers.py

@@ -5,7 +5,7 @@ import os
 import tempfile
 import unittest
 from attic.helpers import adjust_patterns, exclude_path, Location, format_timedelta, IncludePattern, ExcludePattern, make_path_safe, UpgradableLock, prune_within, prune_split, to_localtime, \
-    StableDict, int_to_bigint, bigint_to_int
+    StableDict, int_to_bigint, bigint_to_int, parse_timestamp
 from attic.testsuite import AtticTestCase
 import msgpack
 
@@ -209,3 +209,10 @@ class StableDictTestCase(AtticTestCase):
         d = StableDict(foo=1, bar=2, boo=3, baz=4)
         self.assert_equal(list(d.items()), [('bar', 2), ('baz', 4), ('boo', 3), ('foo', 1)])
         self.assert_equal(hashlib.md5(msgpack.packb(d)).hexdigest(), 'fc78df42cd60691b3ac3dd2a2b39903f')
+
+
+class TestParseTimestamp(AtticTestCase):
+
+    def test(self):
+        self.assert_equal(parse_timestamp('2015-04-19T20:25:00.226410'), datetime(2015, 4, 19, 20, 25, 0, 226410, timezone.utc))
+        self.assert_equal(parse_timestamp('2015-04-19T20:25:00'), datetime(2015, 4, 19, 20, 25, 0, 0, timezone.utc))