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#! /usr/bin/python
# Copyright (C) 2005 Canonical Ltd
# 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
# Author: Martin Pool <mbp@canonical.com>
"""Store and retrieve weaves in files.
"""
# TODO: When extracting a single version it'd be enough to just pass
# an iterator returning the weave lines...
FORMAT_1 = '# bzr weave file v1'
def write_weave_v1(weave, f):
"""Write weave to file f."""
print >>f, FORMAT_1
print >>f
for version, verinfo in enumerate(weave._v):
print >>f, 'v', version
included = list(verinfo.included)
included.sort()
print >>f, 'i',
for i in included:
print >>f, i,
print >>f
print >>f
print >>f, 'w'
for l in weave._l:
if isinstance(l, tuple):
assert len(l) == 2
assert l[0] in '{}[]'
print >>f, '%s %d' % l
else:
assert '\n' not in l
print >>f, '.', l
print >>f, 'W'
def read_weave_v1(f):
from weave import Weave, VerInfo
w = Weave()
assert f.readline() == FORMAT_1+'\n'
assert f.readline() == '\n'
while True:
l = f.readline()
if l[0] == 'v':
l = f.readline()[:-1]
if l[0] != 'i':
raise Exception(`l`)
if len(l) > 2:
included = map(int, l[2:].split(' '))
w._v.append(VerInfo(included))
else:
w._v.append(VerInfo())
assert f.readline() == '\n'
elif l[0] == 'w':
break
else:
assert 0, l
while True:
l = f.readline()
if l == 'W\n':
break
elif l[:2] == '. ':
w._l.append(l[2:-1])
else:
assert l[0] in '{}[]', l
assert l[1] == ' ', l
w._l.append((l[0], int(l[2:])))
return w
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