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- Committer: Jelmer Vernooij
- Date: 2010-09-11 17:48:45 UTC
- mto: (0.312.1 master) (6883.23.1 bundle-git)
- mto: This revision was merged to the branch mainline in revision 6960.
- Revision ID: jelmer@samba.org-20100911174845-ro06bb6gg6ws8jit
More work on roundtrip push support.
- files added:
- .bzrignore
- notes
- tests
- files removed:
- .bzrignore
- bzrlib
- contrib
- contrib/bash
- contrib/zsh
- doc
- elementtree
- notes
- urlgrabber
added
removed
bzrlib/branch.py
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# Copyright (C) 2005 Canonical Ltd
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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from sets import Set
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import sys, os, os.path, random, time, sha, sets, types, re, shutil, tempfile
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import traceback, socket, fnmatch, difflib, time
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from binascii import hexlify
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import bzrlib
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from inventory import Inventory
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from trace import mutter, note
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from tree import Tree, EmptyTree, RevisionTree
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from inventory import InventoryEntry, Inventory
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from osutils import isdir, quotefn, isfile, uuid, sha_file, username, \
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format_date, compact_date, pumpfile, user_email, rand_bytes, splitpath, \
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joinpath, sha_string, file_kind, local_time_offset, appendpath
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from store import ImmutableStore
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from revision import Revision
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from errors import bailout, BzrError
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from textui import show_status
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BZR_BRANCH_FORMAT = "Bazaar-NG branch, format 0.0.4\n"
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## TODO: Maybe include checks for common corruption of newlines, etc?
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def find_branch(f, **args):
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if f and (f.startswith('http://') or f.startswith('https://')):
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import remotebranch
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return remotebranch.RemoteBranch(f, **args)
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else:
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return Branch(f, **args)
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def find_branch_root(f=None):
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"""Find the branch root enclosing f, or pwd.
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f may be a filename or a URL.
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It is not necessary that f exists.
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Basically we keep looking up until we find the control directory or
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run into the root."""
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if f == None:
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f = os.getcwd()
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elif hasattr(os.path, 'realpath'):
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f = os.path.realpath(f)
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else:
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f = os.path.abspath(f)
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if not os.path.exists(f):
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raise BzrError('%r does not exist' % f)
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orig_f = f
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71
while True:
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if os.path.exists(os.path.join(f, bzrlib.BZRDIR)):
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return f
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head, tail = os.path.split(f)
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if head == f:
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# reached the root, whatever that may be
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raise BzrError('%r is not in a branch' % orig_f)
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f = head
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######################################################################
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# branch objects
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class Branch:
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"""Branch holding a history of revisions.
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base
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Base directory of the branch.
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"""
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_lockmode = None
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def __init__(self, base, init=False, find_root=True, lock_mode='w'):
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"""Create new branch object at a particular location.
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base -- Base directory for the branch.
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init -- If True, create new control files in a previously
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unversioned directory. If False, the branch must already
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be versioned.
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find_root -- If true and init is false, find the root of the
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existing branch containing base.
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In the test suite, creation of new trees is tested using the
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`ScratchBranch` class.
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"""
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if init:
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self.base = os.path.realpath(base)
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self._make_control()
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elif find_root:
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self.base = find_branch_root(base)
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else:
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self.base = os.path.realpath(base)
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if not isdir(self.controlfilename('.')):
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bailout("not a bzr branch: %s" % quotefn(base),
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['use "bzr init" to initialize a new working tree',
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'current bzr can only operate from top-of-tree'])
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self._check_format()
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self.lock(lock_mode)
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self.text_store = ImmutableStore(self.controlfilename('text-store'))
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self.revision_store = ImmutableStore(self.controlfilename('revision-store'))
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self.inventory_store = ImmutableStore(self.controlfilename('inventory-store'))
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def __str__(self):
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return '%s(%r)' % (self.__class__.__name__, self.base)
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__repr__ = __str__
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def lock(self, mode='w'):
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"""Lock the on-disk branch, excluding other processes."""
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try:
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import fcntl, errno
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if mode == 'w':
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lm = fcntl.LOCK_EX
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om = os.O_WRONLY | os.O_CREAT
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elif mode == 'r':
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lm = fcntl.LOCK_SH
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om = os.O_RDONLY
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else:
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raise BzrError("invalid locking mode %r" % mode)
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try:
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lockfile = os.open(self.controlfilename('branch-lock'), om)
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except OSError, e:
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if e.errno == errno.ENOENT:
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# might not exist on branches from <0.0.4
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self.controlfile('branch-lock', 'w').close()
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lockfile = os.open(self.controlfilename('branch-lock'), om)
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else:
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raise e
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fcntl.lockf(lockfile, lm)
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def unlock():
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fcntl.lockf(lockfile, fcntl.LOCK_UN)
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os.close(lockfile)
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self._lockmode = None
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self.unlock = unlock
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self._lockmode = mode
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except ImportError:
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warning("please write a locking method for platform %r" % sys.platform)
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def unlock():
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self._lockmode = None
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self.unlock = unlock
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self._lockmode = mode
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def _need_readlock(self):
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if self._lockmode not in ['r', 'w']:
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raise BzrError('need read lock on branch, only have %r' % self._lockmode)
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def _need_writelock(self):
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if self._lockmode not in ['w']:
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raise BzrError('need write lock on branch, only have %r' % self._lockmode)
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def abspath(self, name):
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"""Return absolute filename for something in the branch"""
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return os.path.join(self.base, name)
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def relpath(self, path):
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"""Return path relative to this branch of something inside it.
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Raises an error if path is not in this branch."""
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rp = os.path.realpath(path)
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# FIXME: windows
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if not rp.startswith(self.base):
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bailout("path %r is not within branch %r" % (rp, self.base))
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rp = rp[len(self.base):]
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rp = rp.lstrip(os.sep)
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return rp
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def controlfilename(self, file_or_path):
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"""Return location relative to branch."""
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if isinstance(file_or_path, types.StringTypes):
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file_or_path = [file_or_path]
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return os.path.join(self.base, bzrlib.BZRDIR, *file_or_path)
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def controlfile(self, file_or_path, mode='r'):
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"""Open a control file for this branch.
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There are two classes of file in the control directory: text
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and binary. binary files are untranslated byte streams. Text
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control files are stored with Unix newlines and in UTF-8, even
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if the platform or locale defaults are different.
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Controlfiles should almost never be opened in write mode but
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rather should be atomically copied and replaced using atomicfile.
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"""
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fn = self.controlfilename(file_or_path)
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if mode == 'rb' or mode == 'wb':
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return file(fn, mode)
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elif mode == 'r' or mode == 'w':
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# open in binary mode anyhow so there's no newline translation;
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# codecs uses line buffering by default; don't want that.
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import codecs
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return codecs.open(fn, mode + 'b', 'utf-8',
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buffering=60000)
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else:
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raise BzrError("invalid controlfile mode %r" % mode)
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def _make_control(self):
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os.mkdir(self.controlfilename([]))
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self.controlfile('README', 'w').write(
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"This is a Bazaar-NG control directory.\n"
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"Do not change any files in this directory.")
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self.controlfile('branch-format', 'w').write(BZR_BRANCH_FORMAT)
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for d in ('text-store', 'inventory-store', 'revision-store'):
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os.mkdir(self.controlfilename(d))
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for f in ('revision-history', 'merged-patches',
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'pending-merged-patches', 'branch-name',
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'branch-lock'):
246
self.controlfile(f, 'w').write('')
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mutter('created control directory in ' + self.base)
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Inventory().write_xml(self.controlfile('inventory','w'))
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250
251
def _check_format(self):
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"""Check this branch format is supported.
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The current tool only supports the current unstable format.
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256
In the future, we might need different in-memory Branch
257
classes to support downlevel branches. But not yet.
258
"""
259
# This ignores newlines so that we can open branches created
260
# on Windows from Linux and so on. I think it might be better
261
# to always make all internal files in unix format.
262
fmt = self.controlfile('branch-format', 'r').read()
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fmt.replace('\r\n', '')
264
if fmt != BZR_BRANCH_FORMAT:
265
bailout('sorry, branch format %r not supported' % fmt,
266
['use a different bzr version',
267
'or remove the .bzr directory and "bzr init" again'])
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def read_working_inventory(self):
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"""Read the working inventory."""
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self._need_readlock()
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before = time.time()
274
# ElementTree does its own conversion from UTF-8, so open in
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# binary.
276
inv = Inventory.read_xml(self.controlfile('inventory', 'rb'))
277
mutter("loaded inventory of %d items in %f"
278
% (len(inv), time.time() - before))
279
return inv
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def _write_inventory(self, inv):
283
"""Update the working inventory.
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285
That is to say, the inventory describing changes underway, that
286
will be committed to the next revision.
287
"""
288
self._need_writelock()
289
## TODO: factor out to atomicfile? is rename safe on windows?
290
## TODO: Maybe some kind of clean/dirty marker on inventory?
291
tmpfname = self.controlfilename('inventory.tmp')
292
tmpf = file(tmpfname, 'wb')
293
inv.write_xml(tmpf)
294
tmpf.close()
295
inv_fname = self.controlfilename('inventory')
296
if sys.platform == 'win32':
297
os.remove(inv_fname)
298
os.rename(tmpfname, inv_fname)
299
mutter('wrote working inventory')
300
301
302
inventory = property(read_working_inventory, _write_inventory, None,
303
"""Inventory for the working copy.""")
304
305
306
def add(self, files, verbose=False):
307
"""Make files versioned.
308
309
Note that the command line normally calls smart_add instead.
310
311
This puts the files in the Added state, so that they will be
312
recorded by the next commit.
313
314
TODO: Perhaps have an option to add the ids even if the files do
315
not (yet) exist.
316
317
TODO: Perhaps return the ids of the files? But then again it
318
is easy to retrieve them if they're needed.
319
320
TODO: Option to specify file id.
321
322
TODO: Adding a directory should optionally recurse down and
323
add all non-ignored children. Perhaps do that in a
324
higher-level method.
325
"""
326
self._need_writelock()
327
328
# TODO: Re-adding a file that is removed in the working copy
329
# should probably put it back with the previous ID.
330
if isinstance(files, types.StringTypes):
331
files = [files]
332
333
inv = self.read_working_inventory()
334
for f in files:
335
if is_control_file(f):
336
bailout("cannot add control file %s" % quotefn(f))
337
338
fp = splitpath(f)
339
340
if len(fp) == 0:
341
bailout("cannot add top-level %r" % f)
342
343
fullpath = os.path.normpath(self.abspath(f))
344
345
try:
346
kind = file_kind(fullpath)
347
except OSError:
348
# maybe something better?
349
bailout('cannot add: not a regular file or directory: %s' % quotefn(f))
350
351
if kind != 'file' and kind != 'directory':
352
bailout('cannot add: not a regular file or directory: %s' % quotefn(f))
353
354
file_id = gen_file_id(f)
355
inv.add_path(f, kind=kind, file_id=file_id)
356
357
if verbose:
358
show_status('A', kind, quotefn(f))
359
360
mutter("add file %s file_id:{%s} kind=%r" % (f, file_id, kind))
361
362
self._write_inventory(inv)
363
364
365
def print_file(self, file, revno):
366
"""Print `file` to stdout."""
367
self._need_readlock()
368
tree = self.revision_tree(self.lookup_revision(revno))
369
# use inventory as it was in that revision
370
file_id = tree.inventory.path2id(file)
371
if not file_id:
372
bailout("%r is not present in revision %d" % (file, revno))
373
tree.print_file(file_id)
374
375
376
def remove(self, files, verbose=False):
377
"""Mark nominated files for removal from the inventory.
378
379
This does not remove their text. This does not run on
380
381
TODO: Refuse to remove modified files unless --force is given?
382
383
TODO: Do something useful with directories.
384
385
TODO: Should this remove the text or not? Tough call; not
386
removing may be useful and the user can just use use rm, and
387
is the opposite of add. Removing it is consistent with most
388
other tools. Maybe an option.
389
"""
390
## TODO: Normalize names
391
## TODO: Remove nested loops; better scalability
392
self._need_writelock()
393
394
if isinstance(files, types.StringTypes):
395
files = [files]
396
397
tree = self.working_tree()
398
inv = tree.inventory
399
400
# do this before any modifications
401
for f in files:
402
fid = inv.path2id(f)
403
if not fid:
404
bailout("cannot remove unversioned file %s" % quotefn(f))
405
mutter("remove inventory entry %s {%s}" % (quotefn(f), fid))
406
if verbose:
407
# having remove it, it must be either ignored or unknown
408
if tree.is_ignored(f):
409
new_status = 'I'
410
else:
411
new_status = '?'
412
show_status(new_status, inv[fid].kind, quotefn(f))
413
del inv[fid]
414
415
self._write_inventory(inv)
416
417
418
def unknowns(self):
419
"""Return all unknown files.
420
421
These are files in the working directory that are not versioned or
422
control files or ignored.
423
424
>>> b = ScratchBranch(files=['foo', 'foo~'])
425
>>> list(b.unknowns())
426
['foo']
427
>>> b.add('foo')
428
>>> list(b.unknowns())
429
[]
430
>>> b.remove('foo')
431
>>> list(b.unknowns())
432
['foo']
433
"""
434
return self.working_tree().unknowns()
435
436
437
def append_revision(self, revision_id):
438
mutter("add {%s} to revision-history" % revision_id)
439
rev_history = self.revision_history()
440
441
tmprhname = self.controlfilename('revision-history.tmp')
442
rhname = self.controlfilename('revision-history')
443
444
f = file(tmprhname, 'wt')
445
rev_history.append(revision_id)
446
f.write('\n'.join(rev_history))
447
f.write('\n')
448
f.close()
449
450
if sys.platform == 'win32':
451
os.remove(rhname)
452
os.rename(tmprhname, rhname)
453
454
455
456
def get_revision(self, revision_id):
457
"""Return the Revision object for a named revision"""
458
self._need_readlock()
459
r = Revision.read_xml(self.revision_store[revision_id])
460
assert r.revision_id == revision_id
461
return r
462
463
464
def get_inventory(self, inventory_id):
465
"""Get Inventory object by hash.
466
467
TODO: Perhaps for this and similar methods, take a revision
468
parameter which can be either an integer revno or a
469
string hash."""
470
self._need_readlock()
471
i = Inventory.read_xml(self.inventory_store[inventory_id])
472
return i
473
474
475
def get_revision_inventory(self, revision_id):
476
"""Return inventory of a past revision."""
477
self._need_readlock()
478
if revision_id == None:
479
return Inventory()
480
else:
481
return self.get_inventory(self.get_revision(revision_id).inventory_id)
482
483
484
def revision_history(self):
485
"""Return sequence of revision hashes on to this branch.
486
487
>>> ScratchBranch().revision_history()
488
[]
489
"""
490
self._need_readlock()
491
return [l.rstrip('\r\n') for l in self.controlfile('revision-history', 'r').readlines()]
492
493
494
def enum_history(self, direction):
495
"""Return (revno, revision_id) for history of branch.
496
497
direction
498
'forward' is from earliest to latest
499
'reverse' is from latest to earliest
500
"""
501
rh = self.revision_history()
502
if direction == 'forward':
503
i = 1
504
for rid in rh:
505
yield i, rid
506
i += 1
507
elif direction == 'reverse':
508
i = len(rh)
509
while i > 0:
510
yield i, rh[i-1]
511
i -= 1
512
else:
513
raise BzrError('invalid history direction %r' % direction)
514
515
516
def revno(self):
517
"""Return current revision number for this branch.
518
519
That is equivalent to the number of revisions committed to
520
this branch.
521
"""
522
return len(self.revision_history())
523
524
525
def last_patch(self):
526
"""Return last patch hash, or None if no history.
527
"""
528
ph = self.revision_history()
529
if ph:
530
return ph[-1]
531
else:
532
return None
533
534
535
def commit(self, *args, **kw):
536
"""Deprecated"""
537
from bzrlib.commit import commit
538
commit(self, *args, **kw)
539
540
541
def lookup_revision(self, revno):
542
"""Return revision hash for revision number."""
543
if revno == 0:
544
return None
545
546
try:
547
# list is 0-based; revisions are 1-based
548
return self.revision_history()[revno-1]
549
except IndexError:
550
raise BzrError("no such revision %s" % revno)
551
552
553
def revision_tree(self, revision_id):
554
"""Return Tree for a revision on this branch.
555
556
`revision_id` may be None for the null revision, in which case
557
an `EmptyTree` is returned."""
558
self._need_readlock()
559
if revision_id == None:
560
return EmptyTree()
561
else:
562
inv = self.get_revision_inventory(revision_id)
563
return RevisionTree(self.text_store, inv)
564
565
566
def working_tree(self):
567
"""Return a `Tree` for the working copy."""
568
from workingtree import WorkingTree
569
return WorkingTree(self.base, self.read_working_inventory())
570
571
572
def basis_tree(self):
573
"""Return `Tree` object for last revision.
574
575
If there are no revisions yet, return an `EmptyTree`.
576
"""
577
r = self.last_patch()
578
if r == None:
579
return EmptyTree()
580
else:
581
return RevisionTree(self.text_store, self.get_revision_inventory(r))
582
583
584
585
def rename_one(self, from_rel, to_rel):
586
"""Rename one file.
587
588
This can change the directory or the filename or both.
589
"""
590
self._need_writelock()
591
tree = self.working_tree()
592
inv = tree.inventory
593
if not tree.has_filename(from_rel):
594
bailout("can't rename: old working file %r does not exist" % from_rel)
595
if tree.has_filename(to_rel):
596
bailout("can't rename: new working file %r already exists" % to_rel)
597
598
file_id = inv.path2id(from_rel)
599
if file_id == None:
600
bailout("can't rename: old name %r is not versioned" % from_rel)
601
602
if inv.path2id(to_rel):
603
bailout("can't rename: new name %r is already versioned" % to_rel)
604
605
to_dir, to_tail = os.path.split(to_rel)
606
to_dir_id = inv.path2id(to_dir)
607
if to_dir_id == None and to_dir != '':
608
bailout("can't determine destination directory id for %r" % to_dir)
609
610
mutter("rename_one:")
611
mutter(" file_id {%s}" % file_id)
612
mutter(" from_rel %r" % from_rel)
613
mutter(" to_rel %r" % to_rel)
614
mutter(" to_dir %r" % to_dir)
615
mutter(" to_dir_id {%s}" % to_dir_id)
616
617
inv.rename(file_id, to_dir_id, to_tail)
618
619
print "%s => %s" % (from_rel, to_rel)
620
621
from_abs = self.abspath(from_rel)
622
to_abs = self.abspath(to_rel)
623
try:
624
os.rename(from_abs, to_abs)
625
except OSError, e:
626
bailout("failed to rename %r to %r: %s"
627
% (from_abs, to_abs, e[1]),
628
["rename rolled back"])
629
630
self._write_inventory(inv)
631
632
633
634
def move(self, from_paths, to_name):
635
"""Rename files.
636
637
to_name must exist as a versioned directory.
638
639
If to_name exists and is a directory, the files are moved into
640
it, keeping their old names. If it is a directory,
641
642
Note that to_name is only the last component of the new name;
643
this doesn't change the directory.
644
"""
645
self._need_writelock()
646
## TODO: Option to move IDs only
647
assert not isinstance(from_paths, basestring)
648
tree = self.working_tree()
649
inv = tree.inventory
650
to_abs = self.abspath(to_name)
651
if not isdir(to_abs):
652
bailout("destination %r is not a directory" % to_abs)
653
if not tree.has_filename(to_name):
654
bailout("destination %r not in working directory" % to_abs)
655
to_dir_id = inv.path2id(to_name)
656
if to_dir_id == None and to_name != '':
657
bailout("destination %r is not a versioned directory" % to_name)
658
to_dir_ie = inv[to_dir_id]
659
if to_dir_ie.kind not in ('directory', 'root_directory'):
660
bailout("destination %r is not a directory" % to_abs)
661
662
to_idpath = Set(inv.get_idpath(to_dir_id))
663
664
for f in from_paths:
665
if not tree.has_filename(f):
666
bailout("%r does not exist in working tree" % f)
667
f_id = inv.path2id(f)
668
if f_id == None:
669
bailout("%r is not versioned" % f)
670
name_tail = splitpath(f)[-1]
671
dest_path = appendpath(to_name, name_tail)
672
if tree.has_filename(dest_path):
673
bailout("destination %r already exists" % dest_path)
674
if f_id in to_idpath:
675
bailout("can't move %r to a subdirectory of itself" % f)
676
677
# OK, so there's a race here, it's possible that someone will
678
# create a file in this interval and then the rename might be
679
# left half-done. But we should have caught most problems.
680
681
for f in from_paths:
682
name_tail = splitpath(f)[-1]
683
dest_path = appendpath(to_name, name_tail)
684
print "%s => %s" % (f, dest_path)
685
inv.rename(inv.path2id(f), to_dir_id, name_tail)
686
try:
687
os.rename(self.abspath(f), self.abspath(dest_path))
688
except OSError, e:
689
bailout("failed to rename %r to %r: %s" % (f, dest_path, e[1]),
690
["rename rolled back"])
691
692
self._write_inventory(inv)
693
694
695
696
697
class ScratchBranch(Branch):
698
"""Special test class: a branch that cleans up after itself.
699
700
>>> b = ScratchBranch()
701
>>> isdir(b.base)
702
True
703
>>> bd = b.base
704
>>> b.destroy()
705
>>> isdir(bd)
706
False
707
"""
708
def __init__(self, files=[], dirs=[]):
709
"""Make a test branch.
710
711
This creates a temporary directory and runs init-tree in it.
712
713
If any files are listed, they are created in the working copy.
714
"""
715
Branch.__init__(self, tempfile.mkdtemp(), init=True)
716
for d in dirs:
717
os.mkdir(self.abspath(d))
718
719
for f in files:
720
file(os.path.join(self.base, f), 'w').write('content of %s' % f)
721
722
723
def __del__(self):
724
self.destroy()
725
726
def destroy(self):
727
"""Destroy the test branch, removing the scratch directory."""
728
try:
729
mutter("delete ScratchBranch %s" % self.base)
730
shutil.rmtree(self.base)
731
except OSError, e:
732
# Work around for shutil.rmtree failing on Windows when
733
# readonly files are encountered
734
mutter("hit exception in destroying ScratchBranch: %s" % e)
735
for root, dirs, files in os.walk(self.base, topdown=False):
736
for name in files:
737
os.chmod(os.path.join(root, name), 0700)
738
shutil.rmtree(self.base)
739
self.base = None
740
741
742
743
######################################################################
744
# predicates
745
746
747
def is_control_file(filename):
748
## FIXME: better check
749
filename = os.path.normpath(filename)
750
while filename != '':
751
head, tail = os.path.split(filename)
752
## mutter('check %r for control file' % ((head, tail), ))
753
if tail == bzrlib.BZRDIR:
754
return True
755
if filename == head:
756
break
757
filename = head
758
return False
759
760
761
762
def gen_file_id(name):
763
"""Return new file id.
764
765
This should probably generate proper UUIDs, but for the moment we
766
cope with just randomness because running uuidgen every time is
767
slow."""
768
idx = name.rfind('/')
769
if idx != -1:
770
name = name[idx+1 : ]
771
idx = name.rfind('\\')
772
if idx != -1:
773
name = name[idx+1 : ]
774
775
name = name.lstrip('.')
776
777
s = hexlify(rand_bytes(8))
778
return '-'.join((name, compact_date(time.time()), s))
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0