1 files changed, 76 insertions, 0 deletions
diff --git a/git/objects/tag.py b/git/objects/tag.py
new file mode 100644
index 00000000..c7d02abe
--- /dev/null
+++ b/git/objects/tag.py
@@ -0,0 +1,76 @@
+# objects.py
+# Copyright (C) 2008, 2009 Michael Trier (mtrier@gmail.com) and contributors
+#
+# This module is part of GitPython and is released under
+# the BSD License: http://www.opensource.org/licenses/bsd-license.php
+""" Module containing all object based types. """
+import base
+from gitdb.util import hex_to_bin
+from util import (
+						get_object_type_by_name,
+						parse_actor_and_date
+					)
+
+__all__ = ("TagObject", )
+
+class TagObject(base.Object):
+	"""Non-Lightweight tag carrying additional information about an object we are pointing to."""
+	type = "tag"
+	__slots__ = ( "object", "tag", "tagger", "tagged_date", "tagger_tz_offset", "message" )
+		
+	def __init__(self, repo, binsha, object=None, tag=None, 
+				tagger=None, tagged_date=None, tagger_tz_offset=None, message=None):
+		"""Initialize a tag object with additional data
+		
+		:param repo: repository this object is located in
+		:param binsha: 20 byte SHA1
+		:param object: Object instance of object we are pointing to
+		:param tag: name of this tag
+		:param tagger: Actor identifying the tagger
+		:param tagged_date: int_seconds_since_epoch
+			is the DateTime of the tag creation - use time.gmtime to convert 
+			it into a different format
+		:param tagged_tz_offset: int_seconds_west_of_utc is the timezone that the 
+			authored_date is in, in a format similar to time.altzone"""
+		super(TagObject, self).__init__(repo, binsha )
+		if object is not None:
+			self.object = object
+		if tag is not None:
+			self.tag = tag
+		if tagger is not None:
+			self.tagger = tagger
+		if tagged_date is not None:
+			self.tagged_date = tagged_date
+		if tagger_tz_offset is not None:
+			self.tagger_tz_offset = tagger_tz_offset
+		if message is not None:
+			self.message = message
+		
+	def _set_cache_(self, attr):
+		"""Cache all our attributes at once"""
+		if attr in TagObject.__slots__:
+			ostream = self.repo.odb.stream(self.binsha)
+			lines = ostream.read().splitlines()
+			
+			obj, hexsha = lines[0].split(" ")		# object <hexsha>
+			type_token, type_name = lines[1].split(" ") # type <type_name>
+			self.object = get_object_type_by_name(type_name)(self.repo, hex_to_bin(hexsha))
+			
+			self.tag = lines[2][4:]	 # tag <tag name>
+			
+			tagger_info = lines[3][7:]# tagger <actor> <date>
+			self.tagger, self.tagged_date, self.tagger_tz_offset = parse_actor_and_date(tagger_info)
+			
+			# line 4 empty - it could mark the beginning of the next header
+			# in case there really is no message, it would not exist. Otherwise 
+			# a newline separates header from message
+			if len(lines) > 5:
+				self.message = "\n".join(lines[5:])
+			else:
+				self.message = ''
+		# END check our attributes
+		else:
+			super(TagObject, self)._set_cache_(attr)
+		
+		
+