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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 bzrlib.trace import mutter, note
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from bzrlib.osutils import isdir, quotefn, compact_date, rand_bytes, \
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sha_file, appendpath, file_kind
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from bzrlib.errors import BzrError, InvalidRevisionNumber, InvalidRevisionId, \
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DivergedBranches, NotBranchError, NoSuchFile
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from bzrlib.textui import show_status
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from bzrlib.revision import Revision
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from bzrlib.delta import compare_trees
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from bzrlib.tree import EmptyTree, RevisionTree
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import bzrlib.transport
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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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# TODO: Some operations like log might retrieve the same revisions
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# repeatedly to calculate deltas. We could perhaps have a weakref
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# cache in memory to make this faster.
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def find_branch(*ignored, **ignored_too):
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# XXX: leave this here for about one release, then remove it
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raise NotImplementedError('find_branch() is not supported anymore, '
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'please use one of the new branch constructors')
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def _relpath(base, path):
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"""Return path relative to base, or raise exception.
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The path may be either an absolute path or a path relative to the
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current working directory.
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Lifted out of Branch.relpath for ease of testing.
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os.path.commonprefix (python2.4) has a bad bug that it works just
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on string prefixes, assuming that '/u' is a prefix of '/u2'. This
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avoids that problem."""
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rp = os.path.abspath(path)
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while len(head) >= len(base):
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head, tail = os.path.split(head)
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raise NotBranchError("path %r is not within branch %r" % (rp, base))
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def find_branch_root(t):
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"""Find the branch root enclosing the transport's base.
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t is a Transport object.
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It is not necessary that the base of t 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. If there isn't one, raises NotBranchError.
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if t.has(bzrlib.BZRDIR):
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if new_t.base == t.base:
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# reached the root, whatever that may be
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raise NotBranchError('%s is not in a branch' % orig_base)
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######################################################################
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class Branch(object):
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"""Branch holding a history of revisions.
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Base directory/url of the branch.
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def __init__(self, *ignored, **ignored_too):
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raise NotImplementedError('The Branch class is abstract')
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"""Open an existing branch, rooted at 'base' (url)"""
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t = bzrlib.transport.transport(base)
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def open_containing(base):
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"""Open an existing branch, containing url (search upwards for the root)
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t = bzrlib.transport.transport(base)
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t = find_branch_root(t)
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def initialize(base):
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"""Create a new branch, rooted at 'base' (url)"""
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t = bzrlib.transport.transport(base)
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return _Branch(t, init=True)
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def setup_caching(self, cache_root):
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"""Subclasses that care about caching should override this, and set
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up cached stores located under cache_root.
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class _Branch(Branch):
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"""A branch stored in the actual filesystem.
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Note that it's "local" in the context of the filesystem; it doesn't
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really matter if it's on an nfs/smb/afs/coda/... share, as long as
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it's writable, and can be accessed via the normal filesystem API.
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If _lock_mode is true, a positive count of the number of times the
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Lock object from bzrlib.lock.
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# We actually expect this class to be somewhat short-lived; part of its
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# purpose is to try to isolate what bits of the branch logic are tied to
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# filesystem access, so that in a later step, we can extricate them to
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# a separarte ("storage") class.
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def __init__(self, transport, init=False):
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"""Create new branch object at a particular location.
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transport -- A Transport object, defining how to access files.
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(If a string, transport.transport() will be used to
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create a Transport object)
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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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In the test suite, creation of new trees is tested using the
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`ScratchBranch` class.
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if isinstance(transport, basestring):
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from bzrlib.transport import transport as get_transport
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transport = get_transport(transport)
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self._transport = transport
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return '%s(%r)' % (self.__class__.__name__, self._transport.base)
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if self._lock_mode or self._lock:
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from bzrlib.trace import warning
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warning("branch %r was not explicitly unlocked" % self)
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# TODO: It might be best to do this somewhere else,
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# but it is nice for a Branch object to automatically
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# cache it's information.
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# Alternatively, we could have the Transport objects cache requests
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# See the earlier discussion about how major objects (like Branch)
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# should never expect their __del__ function to run.
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if hasattr(self, 'cache_root') and self.cache_root is not None:
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shutil.rmtree(self.cache_root)
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self.cache_root = None
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return self._transport.base
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base = property(_get_base)
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def lock_write(self):
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# TODO: Upgrade locking to support using a Transport,
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# and potentially a remote locking protocol
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if self._lock_mode != 'w':
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from bzrlib.errors import LockError
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raise LockError("can't upgrade to a write lock from %r" %
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self._lock_count += 1
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self._lock = self._transport.lock_write(
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self._rel_controlfilename('branch-lock'))
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self._lock_mode = 'w'
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assert self._lock_mode in ('r', 'w'), \
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"invalid lock mode %r" % self._lock_mode
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self._lock_count += 1
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self._lock = self._transport.lock_read(
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self._rel_controlfilename('branch-lock'))
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self._lock_mode = 'r'
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if not self._lock_mode:
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from bzrlib.errors import LockError
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raise LockError('branch %r is not locked' % (self))
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if self._lock_count > 1:
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self._lock_count -= 1
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self._lock_mode = self._lock_count = None
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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 self._transport.abspath(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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return self._transport.relpath(path)
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def _rel_controlfilename(self, file_or_path):
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if isinstance(file_or_path, basestring):
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file_or_path = [file_or_path]
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return [bzrlib.BZRDIR] + file_or_path
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def controlfilename(self, file_or_path):
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"""Return location relative to branch."""
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return self._transport.abspath(self._rel_controlfilename(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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relpath = self._rel_controlfilename(file_or_path)
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#TODO: codecs.open() buffers linewise, so it was overloaded with
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# a much larger buffer, do we need to do the same for getreader/getwriter?
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return self._transport.get(relpath)
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raise BzrError("Branch.controlfile(mode='wb') is not supported, use put_controlfiles")
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return codecs.getreader('utf-8')(self._transport.get(relpath), errors='replace')
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raise BzrError("Branch.controlfile(mode='w') is not supported, use put_controlfiles")
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raise BzrError("invalid controlfile mode %r" % mode)
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def put_controlfile(self, path, f, encode=True):
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"""Write an entry as a controlfile.
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:param path: The path to put the file, relative to the .bzr control
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:param f: A file-like or string object whose contents should be copied.
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:param encode: If true, encode the contents as utf-8
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self.put_controlfiles([(path, f)], encode=encode)
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def put_controlfiles(self, files, encode=True):
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"""Write several entries as controlfiles.
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:param files: A list of [(path, file)] pairs, where the path is the directory
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underneath the bzr control directory
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:param encode: If true, encode the contents as utf-8
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for path, f in files:
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if isinstance(f, basestring):
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f = f.encode('utf-8', 'replace')
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f = codecs.getwriter('utf-8')(f, errors='replace')
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path = self._rel_controlfilename(path)
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ctrl_files.append((path, f))
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self._transport.put_multi(ctrl_files)
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def _make_control(self):
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from bzrlib.inventory import Inventory
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from cStringIO import StringIO
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# Create an empty inventory
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# if we want per-tree root ids then this is the place to set
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# them; they're not needed for now and so ommitted for
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bzrlib.xml.serializer_v4.write_inventory(Inventory(), sio)
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dirs = [[], 'text-store', 'inventory-store', 'revision-store']
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"This is a Bazaar-NG control directory.\n"
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"Do not change any files in this directory.\n"),
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('branch-format', BZR_BRANCH_FORMAT),
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('revision-history', ''),
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('merged-patches', ''),
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('pending-merged-patches', ''),
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('pending-merges', ''),
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('inventory', sio.getvalue())
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self._transport.mkdir_multi([self._rel_controlfilename(d) for d in dirs])
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self.put_controlfiles(files)
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mutter('created control directory in ' + self._transport.base)
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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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In the future, we might need different in-memory Branch
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classes to support downlevel branches. But not yet.
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# This ignores newlines so that we can open branches created
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# on Windows from Linux and so on. I think it might be better
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# to always make all internal files in unix format.
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fmt = self.controlfile('branch-format', 'r').read()
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raise NotBranchError('Could not find .bzr/branch-format in %s'
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% self._transport.base)
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fmt = fmt.replace('\r\n', '\n')
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if fmt != BZR_BRANCH_FORMAT:
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raise BzrError('sorry, branch format %r not supported' % fmt,
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['use a different bzr version',
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'or remove the .bzr directory and "bzr init" again'])
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# We know that the format is the currently supported one.
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# So create the rest of the entries.
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from bzrlib.store.compressed_text import CompressedTextStore
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if self._transport.should_cache():
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self.cache_root = tempfile.mkdtemp(prefix='bzr-cache')
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mutter('Branch %r using caching in %r' % (self, self.cache_root))
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self.cache_root = None
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relpath = self._rel_controlfilename(name)
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store = CompressedTextStore(self._transport.clone(relpath))
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if self._transport.should_cache():
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from meta_store import CachedStore
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cache_path = os.path.join(self.cache_root, name)
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store = CachedStore(store, cache_path)
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self.text_store = get_store('text-store')
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self.revision_store = get_store('revision-store')
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self.inventory_store = get_store('inventory-store')
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def get_root_id(self):
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"""Return the id of this branches root"""
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inv = self.read_working_inventory()
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return inv.root.file_id
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def set_root_id(self, file_id):
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inv = self.read_working_inventory()
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orig_root_id = inv.root.file_id
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del inv._byid[inv.root.file_id]
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inv.root.file_id = file_id
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inv._byid[inv.root.file_id] = inv.root
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if entry.parent_id in (None, orig_root_id):
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entry.parent_id = inv.root.file_id
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self._write_inventory(inv)
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def read_working_inventory(self):
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"""Read the working inventory."""
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from bzrlib.inventory import Inventory
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# ElementTree does its own conversion from UTF-8, so open in
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f = self.controlfile('inventory', 'rb')
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return bzrlib.xml.serializer_v4.read_inventory(f)
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def _write_inventory(self, inv):
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"""Update the working inventory.
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That is to say, the inventory describing changes underway, that
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will be committed to the next revision.
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from cStringIO import StringIO
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bzrlib.xml.serializer_v4.write_inventory(inv, sio)
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# Transport handles atomicity
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self.put_controlfile('inventory', sio)
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mutter('wrote working inventory')
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inventory = property(read_working_inventory, _write_inventory, None,
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"""Inventory for the working copy.""")
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def add(self, files, ids=None):
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"""Make files versioned.
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Note that the command line normally calls smart_add instead,
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which can automatically recurse.
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This puts the files in the Added state, so that they will be
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recorded by the next commit.
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List of paths to add, relative to the base of the tree.
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If set, use these instead of automatically generated ids.
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Must be the same length as the list of files, but may
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contain None for ids that are to be autogenerated.
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TODO: Perhaps have an option to add the ids even if the files do
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TODO: Perhaps yield the ids and paths as they're added.
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# TODO: Re-adding a file that is removed in the working copy
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# should probably put it back with the previous ID.
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if isinstance(files, basestring):
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assert(ids is None or isinstance(ids, basestring))
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ids = [None] * len(files)
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assert(len(ids) == len(files))
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inv = self.read_working_inventory()
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for f,file_id in zip(files, ids):
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if is_control_file(f):
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raise BzrError("cannot add control file %s" % quotefn(f))
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raise BzrError("cannot add top-level %r" % f)
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fullpath = os.path.normpath(self.abspath(f))
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kind = file_kind(fullpath)
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# maybe something better?
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raise BzrError('cannot add: not a regular file or directory: %s' % quotefn(f))
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if kind != 'file' and kind != 'directory':
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raise BzrError('cannot add: not a regular file or directory: %s' % quotefn(f))
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file_id = gen_file_id(f)
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inv.add_path(f, kind=kind, file_id=file_id)
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mutter("add file %s file_id:{%s} kind=%r" % (f, file_id, kind))
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self._write_inventory(inv)
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def print_file(self, file, revno):
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"""Print `file` to stdout."""
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tree = self.revision_tree(self.get_rev_id(revno))
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# use inventory as it was in that revision
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file_id = tree.inventory.path2id(file)
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raise BzrError("%r is not present in revision %s" % (file, revno))
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tree.print_file(file_id)
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def remove(self, files, verbose=False):
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"""Mark nominated files for removal from the inventory.
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This does not remove their text. This does not run on
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TODO: Refuse to remove modified files unless --force is given?
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TODO: Do something useful with directories.
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TODO: Should this remove the text or not? Tough call; not
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removing may be useful and the user can just use use rm, and
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is the opposite of add. Removing it is consistent with most
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other tools. Maybe an option.
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## TODO: Normalize names
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## TODO: Remove nested loops; better scalability
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if isinstance(files, basestring):
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tree = self.working_tree()
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# do this before any modifications
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raise BzrError("cannot remove unversioned file %s" % quotefn(f))
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mutter("remove inventory entry %s {%s}" % (quotefn(f), fid))
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# having remove it, it must be either ignored or unknown
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if tree.is_ignored(f):
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show_status(new_status, inv[fid].kind, quotefn(f))
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self._write_inventory(inv)
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# FIXME: this doesn't need to be a branch method
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def set_inventory(self, new_inventory_list):
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from bzrlib.inventory import Inventory, InventoryEntry
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inv = Inventory(self.get_root_id())
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for path, file_id, parent, kind in new_inventory_list:
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name = os.path.basename(path)
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inv.add(InventoryEntry(file_id, name, kind, parent))
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self._write_inventory(inv)
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"""Return all unknown files.
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These are files in the working directory that are not versioned or
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control files or ignored.
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>>> b = ScratchBranch(files=['foo', 'foo~'])
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>>> list(b.unknowns())
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>>> list(b.unknowns())
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>>> list(b.unknowns())
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return self.working_tree().unknowns()
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def append_revision(self, *revision_ids):
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for revision_id in revision_ids:
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mutter("add {%s} to revision-history" % revision_id)
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rev_history = self.revision_history()
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rev_history.extend(revision_ids)
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self.put_controlfile('revision-history', '\n'.join(rev_history))
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def get_revision_xml_file(self, revision_id):
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"""Return XML file object for revision object."""
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if not revision_id or not isinstance(revision_id, basestring):
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raise InvalidRevisionId(revision_id)
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return self.revision_store[revision_id]
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except (IndexError, KeyError):
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raise bzrlib.errors.NoSuchRevision(self, revision_id)
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get_revision_xml = get_revision_xml_file
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def get_revision(self, revision_id):
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"""Return the Revision object for a named revision"""
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xml_file = self.get_revision_xml_file(revision_id)
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r = bzrlib.xml.serializer_v4.read_revision(xml_file)
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except SyntaxError, e:
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raise bzrlib.errors.BzrError('failed to unpack revision_xml',
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assert r.revision_id == revision_id
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def get_revision_delta(self, revno):
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"""Return the delta for one revision.
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The delta is relative to its mainline predecessor, or the
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empty tree for revision 1.
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assert isinstance(revno, int)
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rh = self.revision_history()
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if not (1 <= revno <= len(rh)):
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raise InvalidRevisionNumber(revno)
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# revno is 1-based; list is 0-based
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new_tree = self.revision_tree(rh[revno-1])
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old_tree = EmptyTree()
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old_tree = self.revision_tree(rh[revno-2])
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return compare_trees(old_tree, new_tree)
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def get_revisions(self, revision_ids, pb=None):
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"""Return the Revision object for a set of named revisions"""
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from bzrlib.revision import Revision
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from bzrlib.xml import unpack_xml
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# TODO: We need to decide what to do here
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# we cannot use a generator with a try/finally, because
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# you cannot guarantee that the caller will iterate through
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# in the past, get_inventory wasn't even wrapped in a
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# try/finally locking block.
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# We could either lock without the try/finally, or just
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# not lock at all. We are reading entries that should
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# I prefer locking with no finally, so that if someone
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# asks for a list of revisions, but doesn't consume them,
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# that is their problem, and they will suffer the consequences
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for xml_file in self.revision_store.get(revision_ids, pb=pb):
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r = bzrlib.xml.serializer_v4.read_revision(xml_file)
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except SyntaxError, e:
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raise bzrlib.errors.BzrError('failed to unpack revision_xml',
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def get_revision_sha1(self, revision_id):
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"""Hash the stored value of a revision, and return it."""
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# In the future, revision entries will be signed. At that
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# point, it is probably best *not* to include the signature
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# in the revision hash. Because that lets you re-sign
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# the revision, (add signatures/remove signatures) and still
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# have all hash pointers stay consistent.
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# But for now, just hash the contents.
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return bzrlib.osutils.sha_file(self.get_revision_xml(revision_id))
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def get_inventory(self, inventory_id):
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"""Get Inventory object by hash.
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TODO: Perhaps for this and similar methods, take a revision
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parameter which can be either an integer revno or a
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f = self.get_inventory_xml_file(inventory_id)
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return bzrlib.xml.serializer_v4.read_inventory(f)
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def get_inventory_xml(self, inventory_id):
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"""Get inventory XML as a file object."""
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# Shouldn't this have a read-lock around it?
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# As well as some sort of trap for missing ids?
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return self.inventory_store[inventory_id]
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get_inventory_xml_file = get_inventory_xml
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def get_inventories(self, inventory_ids, pb=None, permit_failure=False):
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"""Get Inventory objects by id
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# See the discussion in get_revisions for why
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# we don't use a try/finally block here
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for f in self.inventory_store.get(inventory_ids,
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permit_failure=permit_failure, pb=pb):
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# TODO: Possibly put a try/except around this to handle
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# read serialization errors
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r = bzrlib.xml.serializer_v4.read_inventory(f)
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raise bzrlib.errors.NoSuchRevision(self, revision_id)
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def get_inventory_sha1(self, inventory_id):
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"""Return the sha1 hash of the inventory entry
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return sha_file(self.get_inventory_xml(inventory_id))
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def get_revision_inventory(self, revision_id):
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"""Return inventory of a past revision."""
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# bzr 0.0.6 imposes the constraint that the inventory_id
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# must be the same as its revision, so this is trivial.
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if revision_id == None:
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from bzrlib.inventory import Inventory
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return Inventory(self.get_root_id())
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return self.get_inventory(revision_id)
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def revision_history(self):
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"""Return sequence of revision hashes on to this branch.
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>>> ScratchBranch().revision_history()
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return [l.rstrip('\r\n') for l in
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self.controlfile('revision-history', 'r').readlines()]
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def common_ancestor(self, other, self_revno=None, other_revno=None):
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>>> from bzrlib.commit import commit
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>>> sb = ScratchBranch(files=['foo', 'foo~'])
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>>> sb.common_ancestor(sb) == (None, None)
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>>> commit(sb, "Committing first revision", verbose=False)
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>>> sb.common_ancestor(sb)[0]
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>>> clone = sb.clone()
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>>> commit(sb, "Committing second revision", verbose=False)
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>>> sb.common_ancestor(sb)[0]
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>>> sb.common_ancestor(clone)[0]
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>>> commit(clone, "Committing divergent second revision",
822
>>> sb.common_ancestor(clone)[0]
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>>> sb.common_ancestor(clone) == clone.common_ancestor(sb)
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>>> sb.common_ancestor(sb) != clone.common_ancestor(clone)
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>>> clone2 = sb.clone()
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>>> sb.common_ancestor(clone2)[0]
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>>> sb.common_ancestor(clone2, self_revno=1)[0]
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>>> sb.common_ancestor(clone2, other_revno=1)[0]
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my_history = self.revision_history()
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other_history = other.revision_history()
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if self_revno is None:
839
self_revno = len(my_history)
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if other_revno is None:
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other_revno = len(other_history)
842
indices = range(min((self_revno, other_revno)))
845
if my_history[r] == other_history[r]:
846
return r+1, my_history[r]
851
"""Return current revision number for this branch.
853
That is equivalent to the number of revisions committed to
856
return len(self.revision_history())
859
def last_patch(self):
860
"""Return last patch hash, or None if no history.
862
ph = self.revision_history()
869
def missing_revisions(self, other, stop_revision=None, diverged_ok=False):
871
If self and other have not diverged, return a list of the revisions
872
present in other, but missing from self.
874
>>> from bzrlib.commit import commit
875
>>> bzrlib.trace.silent = True
876
>>> br1 = ScratchBranch()
877
>>> br2 = ScratchBranch()
878
>>> br1.missing_revisions(br2)
880
>>> commit(br2, "lala!", rev_id="REVISION-ID-1")
881
>>> br1.missing_revisions(br2)
883
>>> br2.missing_revisions(br1)
885
>>> commit(br1, "lala!", rev_id="REVISION-ID-1")
886
>>> br1.missing_revisions(br2)
888
>>> commit(br2, "lala!", rev_id="REVISION-ID-2A")
889
>>> br1.missing_revisions(br2)
891
>>> commit(br1, "lala!", rev_id="REVISION-ID-2B")
892
>>> br1.missing_revisions(br2)
893
Traceback (most recent call last):
894
DivergedBranches: These branches have diverged.
896
self_history = self.revision_history()
897
self_len = len(self_history)
898
other_history = other.revision_history()
899
other_len = len(other_history)
900
common_index = min(self_len, other_len) -1
901
if common_index >= 0 and \
902
self_history[common_index] != other_history[common_index]:
903
raise DivergedBranches(self, other)
905
if stop_revision is None:
906
stop_revision = other_len
907
elif stop_revision > other_len:
908
raise bzrlib.errors.NoSuchRevision(self, stop_revision)
910
return other_history[self_len:stop_revision]
913
def update_revisions(self, other, stop_revision=None):
914
"""Pull in all new revisions from other branch.
916
from bzrlib.fetch import greedy_fetch
917
from bzrlib.revision import get_intervening_revisions
919
pb = bzrlib.ui.ui_factory.progress_bar()
920
pb.update('comparing histories')
921
if stop_revision is None:
922
other_revision = other.last_patch()
924
other_revision = other.get_rev_id(stop_revision)
925
count = greedy_fetch(self, other, other_revision, pb)[0]
927
revision_ids = self.missing_revisions(other, stop_revision)
928
except DivergedBranches, e:
930
revision_ids = get_intervening_revisions(self.last_patch(),
931
other_revision, self)
932
assert self.last_patch() not in revision_ids
933
except bzrlib.errors.NotAncestor:
936
self.append_revision(*revision_ids)
939
def install_revisions(self, other, revision_ids, pb):
940
# We are going to iterate this many times, so make sure
941
# that it is a list, and not a generator
942
revision_ids = list(revision_ids)
943
if hasattr(other.revision_store, "prefetch"):
944
other.revision_store.prefetch(revision_ids)
945
if hasattr(other.inventory_store, "prefetch"):
946
other.inventory_store.prefetch(revision_ids)
949
pb = bzrlib.ui.ui_factory.progress_bar()
951
# This entire next section is generally done
952
# with either generators, or bulk updates
953
inventories = other.get_inventories(revision_ids, permit_failure=True)
957
good_revisions = set()
958
for i, (inv, rev_id) in enumerate(zip(inventories, revision_ids)):
959
pb.update('fetching revision', i+1, len(revision_ids))
961
# We don't really need to get the revision here, because
962
# the only thing we needed was the inventory_id, which now
963
# is (by design) identical to the revision_id
965
# rev = other.get_revision(rev_id)
966
# except bzrlib.errors.NoSuchRevision:
967
# failures.add(rev_id)
974
good_revisions.add(rev_id)
977
for key, entry in inv.iter_entries():
978
if entry.text_id is None:
980
text_ids.append(entry.text_id)
982
has_ids = self.text_store.has(text_ids)
983
for has, text_id in zip(has_ids, text_ids):
985
needed_texts.add(text_id)
989
count, cp_fail = self.text_store.copy_multi(other.text_store,
991
#print "Added %d texts." % count
992
count, cp_fail = self.inventory_store.copy_multi(other.inventory_store,
994
#print "Added %d inventories." % count
995
count, cp_fail = self.revision_store.copy_multi(other.revision_store,
998
assert len(cp_fail) == 0
999
return count, failures
1002
def commit(self, *args, **kw):
1003
from bzrlib.commit import commit
1004
commit(self, *args, **kw)
1007
def revision_id_to_revno(self, revision_id):
1008
"""Given a revision id, return its revno"""
1009
history = self.revision_history()
1011
return history.index(revision_id) + 1
1013
raise bzrlib.errors.NoSuchRevision(self, revision_id)
1016
def get_rev_id(self, revno, history=None):
1017
"""Find the revision id of the specified revno."""
1021
history = self.revision_history()
1022
elif revno <= 0 or revno > len(history):
1023
raise bzrlib.errors.NoSuchRevision(self, revno)
1024
return history[revno - 1]
1027
def revision_tree(self, revision_id):
1028
"""Return Tree for a revision on this branch.
1030
`revision_id` may be None for the null revision, in which case
1031
an `EmptyTree` is returned."""
1032
# TODO: refactor this to use an existing revision object
1033
# so we don't need to read it in twice.
1034
if revision_id == None:
1037
inv = self.get_revision_inventory(revision_id)
1038
return RevisionTree(self.text_store, inv)
1041
def working_tree(self):
1042
"""Return a `Tree` for the working copy."""
1043
from bzrlib.workingtree import WorkingTree
1044
# TODO: In the future, WorkingTree should utilize Transport
1045
return WorkingTree(self._transport.base, self.read_working_inventory())
1048
def basis_tree(self):
1049
"""Return `Tree` object for last revision.
1051
If there are no revisions yet, return an `EmptyTree`.
1053
r = self.last_patch()
1057
return RevisionTree(self.text_store, self.get_revision_inventory(r))
1061
def rename_one(self, from_rel, to_rel):
1064
This can change the directory or the filename or both.
1068
tree = self.working_tree()
1069
inv = tree.inventory
1070
if not tree.has_filename(from_rel):
1071
raise BzrError("can't rename: old working file %r does not exist" % from_rel)
1072
if tree.has_filename(to_rel):
1073
raise BzrError("can't rename: new working file %r already exists" % to_rel)
1075
file_id = inv.path2id(from_rel)
1077
raise BzrError("can't rename: old name %r is not versioned" % from_rel)
1079
if inv.path2id(to_rel):
1080
raise BzrError("can't rename: new name %r is already versioned" % to_rel)
1082
to_dir, to_tail = os.path.split(to_rel)
1083
to_dir_id = inv.path2id(to_dir)
1084
if to_dir_id == None and to_dir != '':
1085
raise BzrError("can't determine destination directory id for %r" % to_dir)
1087
mutter("rename_one:")
1088
mutter(" file_id {%s}" % file_id)
1089
mutter(" from_rel %r" % from_rel)
1090
mutter(" to_rel %r" % to_rel)
1091
mutter(" to_dir %r" % to_dir)
1092
mutter(" to_dir_id {%s}" % to_dir_id)
1094
inv.rename(file_id, to_dir_id, to_tail)
1096
from_abs = self.abspath(from_rel)
1097
to_abs = self.abspath(to_rel)
1099
os.rename(from_abs, to_abs)
1101
raise BzrError("failed to rename %r to %r: %s"
1102
% (from_abs, to_abs, e[1]),
1103
["rename rolled back"])
1105
self._write_inventory(inv)
1110
def move(self, from_paths, to_name):
1113
to_name must exist as a versioned directory.
1115
If to_name exists and is a directory, the files are moved into
1116
it, keeping their old names. If it is a directory,
1118
Note that to_name is only the last component of the new name;
1119
this doesn't change the directory.
1121
This returns a list of (from_path, to_path) pairs for each
1122
entry that is moved.
1127
## TODO: Option to move IDs only
1128
assert not isinstance(from_paths, basestring)
1129
tree = self.working_tree()
1130
inv = tree.inventory
1131
to_abs = self.abspath(to_name)
1132
if not isdir(to_abs):
1133
raise BzrError("destination %r is not a directory" % to_abs)
1134
if not tree.has_filename(to_name):
1135
raise BzrError("destination %r not in working directory" % to_abs)
1136
to_dir_id = inv.path2id(to_name)
1137
if to_dir_id == None and to_name != '':
1138
raise BzrError("destination %r is not a versioned directory" % to_name)
1139
to_dir_ie = inv[to_dir_id]
1140
if to_dir_ie.kind not in ('directory', 'root_directory'):
1141
raise BzrError("destination %r is not a directory" % to_abs)
1143
to_idpath = inv.get_idpath(to_dir_id)
1145
for f in from_paths:
1146
if not tree.has_filename(f):
1147
raise BzrError("%r does not exist in working tree" % f)
1148
f_id = inv.path2id(f)
1150
raise BzrError("%r is not versioned" % f)
1151
name_tail = splitpath(f)[-1]
1152
dest_path = appendpath(to_name, name_tail)
1153
if tree.has_filename(dest_path):
1154
raise BzrError("destination %r already exists" % dest_path)
1155
if f_id in to_idpath:
1156
raise BzrError("can't move %r to a subdirectory of itself" % f)
1158
# OK, so there's a race here, it's possible that someone will
1159
# create a file in this interval and then the rename might be
1160
# left half-done. But we should have caught most problems.
1162
for f in from_paths:
1163
name_tail = splitpath(f)[-1]
1164
dest_path = appendpath(to_name, name_tail)
1165
result.append((f, dest_path))
1166
inv.rename(inv.path2id(f), to_dir_id, name_tail)
1168
os.rename(self.abspath(f), self.abspath(dest_path))
1170
raise BzrError("failed to rename %r to %r: %s" % (f, dest_path, e[1]),
1171
["rename rolled back"])
1173
self._write_inventory(inv)
1180
def revert(self, filenames, old_tree=None, backups=True):
1181
"""Restore selected files to the versions from a previous tree.
1184
If true (default) backups are made of files before
1187
from bzrlib.errors import NotVersionedError, BzrError
1188
from bzrlib.atomicfile import AtomicFile
1189
from bzrlib.osutils import backup_file
1191
inv = self.read_working_inventory()
1192
if old_tree is None:
1193
old_tree = self.basis_tree()
1194
old_inv = old_tree.inventory
1197
for fn in filenames:
1198
file_id = inv.path2id(fn)
1200
raise NotVersionedError("not a versioned file", fn)
1201
if not old_inv.has_id(file_id):
1202
raise BzrError("file not present in old tree", fn, file_id)
1203
nids.append((fn, file_id))
1205
# TODO: Rename back if it was previously at a different location
1207
# TODO: If given a directory, restore the entire contents from
1208
# the previous version.
1210
# TODO: Make a backup to a temporary file.
1212
# TODO: If the file previously didn't exist, delete it?
1213
for fn, file_id in nids:
1216
f = AtomicFile(fn, 'wb')
1218
f.write(old_tree.get_file(file_id).read())
1224
def pending_merges(self):
1225
"""Return a list of pending merges.
1227
These are revisions that have been merged into the working
1228
directory but not yet committed.
1230
cfn = self._rel_controlfilename('pending-merges')
1231
if not self._transport.has(cfn):
1234
for l in self.controlfile('pending-merges', 'r').readlines():
1235
p.append(l.rstrip('\n'))
1239
def add_pending_merge(self, *revision_ids):
1240
from bzrlib.revision import validate_revision_id
1242
for rev_id in revision_ids:
1243
validate_revision_id(rev_id)
1245
p = self.pending_merges()
1247
for rev_id in revision_ids:
1253
self.set_pending_merges(p)
1255
def set_pending_merges(self, rev_list):
1258
self.put_controlfile('pending-merges', '\n'.join(rev_list))
1263
def get_parent(self):
1264
"""Return the parent location of the branch.
1266
This is the default location for push/pull/missing. The usual
1267
pattern is that the user can override it by specifying a
1271
_locs = ['parent', 'pull', 'x-pull']
1274
return self.controlfile(l, 'r').read().strip('\n')
1276
if e.errno != errno.ENOENT:
1281
def set_parent(self, url):
1282
# TODO: Maybe delete old location files?
1283
from bzrlib.atomicfile import AtomicFile
1286
f = AtomicFile(self.controlfilename('parent'))
1295
def check_revno(self, revno):
1297
Check whether a revno corresponds to any revision.
1298
Zero (the NULL revision) is considered valid.
1301
self.check_real_revno(revno)
1303
def check_real_revno(self, revno):
1305
Check whether a revno corresponds to a real revision.
1306
Zero (the NULL revision) is considered invalid
1308
if revno < 1 or revno > self.revno():
1309
raise InvalidRevisionNumber(revno)
1315
class ScratchBranch(_Branch):
1316
"""Special test class: a branch that cleans up after itself.
1318
>>> b = ScratchBranch()
1326
def __init__(self, files=[], dirs=[], base=None):
1327
"""Make a test branch.
1329
This creates a temporary directory and runs init-tree in it.
1331
If any files are listed, they are created in the working copy.
1333
from tempfile import mkdtemp
1338
_Branch.__init__(self, base, init=init)
1340
self._transport.mkdir(d)
1343
self._transport.put(f, 'content of %s' % f)
1348
>>> orig = ScratchBranch(files=["file1", "file2"])
1349
>>> clone = orig.clone()
1350
>>> os.path.samefile(orig.base, clone.base)
1352
>>> os.path.isfile(os.path.join(clone.base, "file1"))
1355
from shutil import copytree
1356
from tempfile import mkdtemp
1359
copytree(self.base, base, symlinks=True)
1360
return ScratchBranch(base=base)
1368
"""Destroy the test branch, removing the scratch directory."""
1369
from shutil import rmtree
1372
mutter("delete ScratchBranch %s" % self.base)
1375
# Work around for shutil.rmtree failing on Windows when
1376
# readonly files are encountered
1377
mutter("hit exception in destroying ScratchBranch: %s" % e)
1378
for root, dirs, files in os.walk(self.base, topdown=False):
1380
os.chmod(os.path.join(root, name), 0700)
1382
self._transport = None
1386
######################################################################
1390
def is_control_file(filename):
1391
## FIXME: better check
1392
filename = os.path.normpath(filename)
1393
while filename != '':
1394
head, tail = os.path.split(filename)
1395
## mutter('check %r for control file' % ((head, tail), ))
1396
if tail == bzrlib.BZRDIR:
1398
if filename == head:
1405
def gen_file_id(name):
1406
"""Return new file id.
1408
This should probably generate proper UUIDs, but for the moment we
1409
cope with just randomness because running uuidgen every time is
1412
from binascii import hexlify
1413
from time import time
1415
# get last component
1416
idx = name.rfind('/')
1418
name = name[idx+1 : ]
1419
idx = name.rfind('\\')
1421
name = name[idx+1 : ]
1423
# make it not a hidden file
1424
name = name.lstrip('.')
1426
# remove any wierd characters; we don't escape them but rather
1427
# just pull them out
1428
name = re.sub(r'[^\w.]', '', name)
1430
s = hexlify(rand_bytes(8))
1431
return '-'.join((name, compact_date(time()), s))
1435
"""Return a new tree-root file id."""
1436
return gen_file_id('TREE_ROOT')
1439
def copy_branch(branch_from, to_location, revision=None):
1440
"""Copy branch_from into the existing directory to_location.
1443
If not None, only revisions up to this point will be copied.
1444
The head of the new branch will be that revision.
1447
The name of a local directory that exists but is empty.
1449
from bzrlib.merge import merge
1450
from bzrlib.revisionspec import RevisionSpec
1452
assert isinstance(branch_from, Branch)
1453
assert isinstance(to_location, basestring)
1455
br_to = Branch.initialize(to_location)
1456
br_to.set_root_id(branch_from.get_root_id())
1457
if revision is None:
1458
revno = branch_from.revno()
1460
revno, rev_id = RevisionSpec(revision).in_history(branch_from)
1461
br_to.update_revisions(branch_from, stop_revision=revno)
1462
merge((to_location, -1), (to_location, 0), this_dir=to_location,
1463
check_clean=False, ignore_zero=True)
1464
br_to.set_parent(branch_from.base)