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# Copyright (C) 2008-2009 Gianluca Montecchi <gian@grys.it>
# W. Trevor King <wking@drexel.edu>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
"""
Handle ID creation and parsing.
"""
import os.path
import libbe
if libbe.TESTING == True:
import unittest
try:
from uuid import uuid4 # Python >= 2.5
def uuid_gen():
id = uuid4()
idstr = id.urn
start = "urn:uuid:"
assert idstr.startswith(start)
return idstr[len(start):]
except ImportError:
import os
import sys
from subprocess import Popen, PIPE
def uuid_gen():
# Shell-out to system uuidgen
args = ['uuidgen', 'r']
try:
if sys.platform != "win32":
q = Popen(args, stdin=PIPE, stdout=PIPE, stderr=PIPE)
else:
# win32 don't have os.execvp() so have to run command in a shell
q = Popen(args, stdin=PIPE, stdout=PIPE, stderr=PIPE,
shell=True, cwd=cwd)
except OSError, e :
strerror = "%s\nwhile executing %s" % (e.args[1], args)
raise OSError, strerror
output, error = q.communicate()
status = q.wait()
if status != 0:
strerror = "%s\nwhile executing %s" % (status, args)
raise Exception, strerror
return output.rstrip('\n')
def _assemble(*args):
args = list(args)
for i,arg in enumerate(args):
if arg == None:
args[i] = ''
return '/'.join(args)
def _split(id):
args = id.split('/')
for i,arg in enumerate(args):
if arg == '':
args[i] = None
return args
def _is_a_uuid(id):
if id.startswith('uuid:'):
return True
return False
def _uuid_to_id(id):
return 'uuid:' + id
def _id_to_uuid(id):
return id[len('uuid:'):]
def bugdir_id(bugdir, *args):
return _assemble(_uuid_to_id(bugdir.uuid), *args)
def bug_id(bug, *args):
if bug.bugdir == None:
bdid = None
else:
bdid = bugdir_id(bug.bugdir)
return _assemble(bdid, _uuid_to_id(bug.uuid), *args)
def comment_id(comment, *args):
if comment.bug == None:
bid = None
else:
bid = bug_id(comment.bug)
return _assemble(bid, _uuid_to_id(comment.uuid), *args)
def parse_id(id):
args = _split(id)
ret = {'bugdir':_id_to_uuid(args.pop(0))}
type = 'bugdir'
for child_name in ['bug', 'comment']:
if len(args) > 0 and _is_a_uuid(args[0]):
ret[child_name] = _id_to_uuid(args.pop(0))
type = child_name
ret['type'] = type
ret['remaining'] = os.path.join(args)
return ret
if libbe.TESTING == True:
class UUIDtestCase(unittest.TestCase):
def testUUID_gen(self):
id = uuid_gen()
self.failUnless(len(id) == 36, "invalid UUID '%s'" % id)
suite = unittest.TestLoader().loadTestsFromTestCase(UUIDtestCase)
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