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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 warnings import warn
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from cStringIO import StringIO
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from bzrlib.inventory import InventoryEntry
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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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rename, splitpath, sha_file, appendpath,
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from bzrlib.errors import (BzrError, InvalidRevisionNumber, InvalidRevisionId,
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NoSuchRevision, HistoryMissing, NotBranchError,
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DivergedBranches, LockError, UnlistableStore,
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UnlistableBranch, NoSuchFile)
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from bzrlib.textui import show_status
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from bzrlib.revision import Revision, validate_revision_id, is_ancestor
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from bzrlib.delta import compare_trees
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from bzrlib.tree import EmptyTree, RevisionTree
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from bzrlib.inventory import Inventory
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from bzrlib.store import copy_all
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from bzrlib.store.compressed_text import CompressedTextStore
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from bzrlib.store.text import TextStore
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from bzrlib.store.weave import WeaveStore
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from bzrlib.transport import Transport, get_transport
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BZR_BRANCH_FORMAT_4 = "Bazaar-NG branch, format 0.0.4\n"
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BZR_BRANCH_FORMAT_5 = "Bazaar-NG branch, format 5\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. In general anything can be
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# cached in memory between lock and unlock operations.
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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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new_t = t.clone('..')
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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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def open_downlevel(base):
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"""Open a branch which may be of an old format.
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Only local branches are supported."""
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return _Branch(get_transport(base), relax_version_check=True)
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"""Open an existing branch, rooted at 'base' (url)"""
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t = get_transport(base)
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def open_containing(url):
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"""Open an existing branch which contains url.
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This probes for a branch at url, and searches upwards from there.
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t = get_transport(url)
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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 = get_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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_inventory_weave = None
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# Map some sort of prefix into a namespace
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# stuff like "revno:10", "revid:", etc.
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# This should match a prefix with a function which accepts
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REVISION_NAMESPACES = {}
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def push_stores(self, branch_to):
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"""Copy the content of this branches store to branch_to."""
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if (self._branch_format != branch_to._branch_format
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or self._branch_format != 4):
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from bzrlib.fetch import greedy_fetch
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mutter("falling back to fetch logic to push between %s(%s) and %s(%s)",
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self, self._branch_format, branch_to, branch_to._branch_format)
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greedy_fetch(to_branch=branch_to, from_branch=self,
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revision=self.last_revision())
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store_pairs = ((self.text_store, branch_to.text_store),
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(self.inventory_store, branch_to.inventory_store),
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(self.revision_store, branch_to.revision_store))
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for from_store, to_store in store_pairs:
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copy_all(from_store, to_store)
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except UnlistableStore:
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raise UnlistableBranch(from_store)
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def __init__(self, transport, init=False,
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relax_version_check=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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relax_version_check -- If true, the usual check for the branch
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version is not applied. This is intended only for
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upgrade/recovery type use; it's not guaranteed that
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all operations will work on old format branches.
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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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assert isinstance(transport, Transport), \
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"%r is not a Transport" % transport
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self._transport = transport
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self._check_format(relax_version_check)
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def get_store(name, compressed=True):
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relpath = self._rel_controlfilename(name)
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store = CompressedTextStore(self._transport.clone(relpath))
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store = TextStore(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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relpath = self._rel_controlfilename(name)
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ws = WeaveStore(self._transport.clone(relpath))
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if self._transport.should_cache():
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ws.enable_cache = True
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if self._branch_format == 4:
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self.inventory_store = get_store('inventory-store')
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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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elif self._branch_format == 5:
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self.control_weaves = get_weave([])
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self.weave_store = get_weave('weaves')
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self.revision_store = get_store('revision-store', compressed=False)
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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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# XXX: This should show something every time, and be suitable for
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# headless operation and embedding
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warn("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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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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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 bzrlib.weavefile import write_weave_v5
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from bzrlib.weave import Weave
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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.xml5.serializer_v5.write_inventory(Inventory(), sio)
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empty_inv = sio.getvalue()
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bzrlib.weavefile.write_weave_v5(Weave(), sio)
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empty_weave = sio.getvalue()
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dirs = [[], 'revision-store', 'weaves']
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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_5),
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('revision-history', ''),
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('pending-merges', ''),
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('inventory', empty_inv),
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('inventory.weave', empty_weave),
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('ancestry.weave', empty_weave)
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cfn = self._rel_controlfilename
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self._transport.mkdir_multi([cfn(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, relax_version_check):
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"""Check this branch format is supported.
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The format level is stored, as an integer, in
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self._branch_format for code that needs to check it later.
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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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fmt = self.controlfile('branch-format', 'r').read()
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raise NotBranchError(self.base)
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if fmt == BZR_BRANCH_FORMAT_5:
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self._branch_format = 5
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elif fmt == BZR_BRANCH_FORMAT_4:
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self._branch_format = 4
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if (not relax_version_check
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and self._branch_format != 5):
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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'
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' and "bzr init" again'])
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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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# 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.xml5.serializer_v5.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.xml5.serializer_v5.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, symlink or directory: %s' % quotefn(f))
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if not InventoryEntry.versionable_kind(kind):
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raise BzrError('cannot add: not a versionable file ('
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'i.e. regular file, symlink 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 has_revision(self, revision_id):
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"""True if this branch has a copy of the revision.
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This does not necessarily imply the revision is merge
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or on the mainline."""
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return (revision_id is None
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or revision_id in self.revision_store)
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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_xml(self, revision_id):
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return self.get_revision_xml_file(revision_id).read()
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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.xml5.serializer_v5.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_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_file(revision_id))
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def _get_ancestry_weave(self):
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return self.control_weaves.get_weave('ancestry')
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def get_ancestry(self, revision_id):
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"""Return a list of revision-ids integrated by a revision.
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if revision_id is None:
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w = self._get_ancestry_weave()
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return [None] + [l[:-1] for l in w.get_iter(w.lookup(revision_id))]
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def get_inventory_weave(self):
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return self.control_weaves.get_weave('inventory')
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def get_inventory(self, revision_id):
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"""Get Inventory object by hash."""
787
xml = self.get_inventory_xml(revision_id)
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return bzrlib.xml5.serializer_v5.read_inventory_from_string(xml)
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def get_inventory_xml(self, revision_id):
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"""Get inventory XML as a file object."""
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assert isinstance(revision_id, basestring), type(revision_id)
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iw = self.get_inventory_weave()
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return iw.get_text(iw.lookup(revision_id))
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raise bzrlib.errors.HistoryMissing(self, 'inventory', revision_id)
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def get_inventory_sha1(self, revision_id):
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"""Return the sha1 hash of the inventory entry
802
return self.get_revision(revision_id).inventory_sha1
804
def get_revision_inventory(self, revision_id):
805
"""Return inventory of a past revision."""
806
# TODO: Unify this with get_inventory()
807
# bzr 0.0.6 and later imposes the constraint that the inventory_id
808
# must be the same as its revision, so this is trivial.
809
if revision_id == None:
810
return Inventory(self.get_root_id())
812
return self.get_inventory(revision_id)
814
def revision_history(self):
815
"""Return sequence of revision hashes on to this branch."""
818
return [l.rstrip('\r\n') for l in
819
self.controlfile('revision-history', 'r').readlines()]
823
def common_ancestor(self, other, self_revno=None, other_revno=None):
825
>>> from bzrlib.commit import commit
826
>>> sb = ScratchBranch(files=['foo', 'foo~'])
827
>>> sb.common_ancestor(sb) == (None, None)
829
>>> commit(sb, "Committing first revision", verbose=False)
830
>>> sb.common_ancestor(sb)[0]
832
>>> clone = sb.clone()
833
>>> commit(sb, "Committing second revision", verbose=False)
834
>>> sb.common_ancestor(sb)[0]
836
>>> sb.common_ancestor(clone)[0]
838
>>> commit(clone, "Committing divergent second revision",
840
>>> sb.common_ancestor(clone)[0]
842
>>> sb.common_ancestor(clone) == clone.common_ancestor(sb)
844
>>> sb.common_ancestor(sb) != clone.common_ancestor(clone)
846
>>> clone2 = sb.clone()
847
>>> sb.common_ancestor(clone2)[0]
849
>>> sb.common_ancestor(clone2, self_revno=1)[0]
851
>>> sb.common_ancestor(clone2, other_revno=1)[0]
854
my_history = self.revision_history()
855
other_history = other.revision_history()
856
if self_revno is None:
857
self_revno = len(my_history)
858
if other_revno is None:
859
other_revno = len(other_history)
860
indices = range(min((self_revno, other_revno)))
863
if my_history[r] == other_history[r]:
864
return r+1, my_history[r]
869
"""Return current revision number for this branch.
871
That is equivalent to the number of revisions committed to
874
return len(self.revision_history())
877
def last_revision(self):
878
"""Return last patch hash, or None if no history.
880
ph = self.revision_history()
887
def missing_revisions(self, other, stop_revision=None, diverged_ok=False):
888
"""Return a list of new revisions that would perfectly fit.
890
If self and other have not diverged, return a list of the revisions
891
present in other, but missing from self.
893
>>> from bzrlib.commit import commit
894
>>> bzrlib.trace.silent = True
895
>>> br1 = ScratchBranch()
896
>>> br2 = ScratchBranch()
897
>>> br1.missing_revisions(br2)
899
>>> commit(br2, "lala!", rev_id="REVISION-ID-1")
900
>>> br1.missing_revisions(br2)
902
>>> br2.missing_revisions(br1)
904
>>> commit(br1, "lala!", rev_id="REVISION-ID-1")
905
>>> br1.missing_revisions(br2)
907
>>> commit(br2, "lala!", rev_id="REVISION-ID-2A")
908
>>> br1.missing_revisions(br2)
910
>>> commit(br1, "lala!", rev_id="REVISION-ID-2B")
911
>>> br1.missing_revisions(br2)
912
Traceback (most recent call last):
913
DivergedBranches: These branches have diverged.
915
# FIXME: If the branches have diverged, but the latest
916
# revision in this branch is completely merged into the other,
917
# then we should still be able to pull.
918
self_history = self.revision_history()
919
self_len = len(self_history)
920
other_history = other.revision_history()
921
other_len = len(other_history)
922
common_index = min(self_len, other_len) -1
923
if common_index >= 0 and \
924
self_history[common_index] != other_history[common_index]:
925
raise DivergedBranches(self, other)
927
if stop_revision is None:
928
stop_revision = other_len
930
assert isinstance(stop_revision, int)
931
if stop_revision > other_len:
932
raise bzrlib.errors.NoSuchRevision(self, stop_revision)
933
return other_history[self_len:stop_revision]
935
def update_revisions(self, other, stop_revision=None):
936
"""Pull in new perfect-fit revisions."""
937
from bzrlib.fetch import greedy_fetch
938
from bzrlib.revision import get_intervening_revisions
939
if stop_revision is None:
940
stop_revision = other.last_revision()
941
greedy_fetch(to_branch=self, from_branch=other,
942
revision=stop_revision)
943
pullable_revs = self.missing_revisions(
944
other, other.revision_id_to_revno(stop_revision))
946
greedy_fetch(to_branch=self,
948
revision=pullable_revs[-1])
949
self.append_revision(*pullable_revs)
952
def commit(self, *args, **kw):
953
from bzrlib.commit import Commit
954
Commit().commit(self, *args, **kw)
956
def revision_id_to_revno(self, revision_id):
957
"""Given a revision id, return its revno"""
958
if revision_id is None:
960
history = self.revision_history()
962
return history.index(revision_id) + 1
964
raise bzrlib.errors.NoSuchRevision(self, revision_id)
966
def get_rev_id(self, revno, history=None):
967
"""Find the revision id of the specified revno."""
971
history = self.revision_history()
972
elif revno <= 0 or revno > len(history):
973
raise bzrlib.errors.NoSuchRevision(self, revno)
974
return history[revno - 1]
976
def revision_tree(self, revision_id):
977
"""Return Tree for a revision on this branch.
979
`revision_id` may be None for the null revision, in which case
980
an `EmptyTree` is returned."""
981
# TODO: refactor this to use an existing revision object
982
# so we don't need to read it in twice.
983
if revision_id == None:
986
inv = self.get_revision_inventory(revision_id)
987
return RevisionTree(self.weave_store, inv, revision_id)
990
def working_tree(self):
991
"""Return a `Tree` for the working copy."""
992
from bzrlib.workingtree import WorkingTree
993
# TODO: In the future, WorkingTree should utilize Transport
994
# RobertCollins 20051003 - I don't think it should - working trees are
995
# much more complex to keep consistent than our careful .bzr subset.
996
# instead, we should say that working trees are local only, and optimise
998
return WorkingTree(self._transport.base, self.read_working_inventory())
1001
def basis_tree(self):
1002
"""Return `Tree` object for last revision.
1004
If there are no revisions yet, return an `EmptyTree`.
1006
return self.revision_tree(self.last_revision())
1009
def rename_one(self, from_rel, to_rel):
1012
This can change the directory or the filename or both.
1016
tree = self.working_tree()
1017
inv = tree.inventory
1018
if not tree.has_filename(from_rel):
1019
raise BzrError("can't rename: old working file %r does not exist" % from_rel)
1020
if tree.has_filename(to_rel):
1021
raise BzrError("can't rename: new working file %r already exists" % to_rel)
1023
file_id = inv.path2id(from_rel)
1025
raise BzrError("can't rename: old name %r is not versioned" % from_rel)
1027
if inv.path2id(to_rel):
1028
raise BzrError("can't rename: new name %r is already versioned" % to_rel)
1030
to_dir, to_tail = os.path.split(to_rel)
1031
to_dir_id = inv.path2id(to_dir)
1032
if to_dir_id == None and to_dir != '':
1033
raise BzrError("can't determine destination directory id for %r" % to_dir)
1035
mutter("rename_one:")
1036
mutter(" file_id {%s}" % file_id)
1037
mutter(" from_rel %r" % from_rel)
1038
mutter(" to_rel %r" % to_rel)
1039
mutter(" to_dir %r" % to_dir)
1040
mutter(" to_dir_id {%s}" % to_dir_id)
1042
inv.rename(file_id, to_dir_id, to_tail)
1044
from_abs = self.abspath(from_rel)
1045
to_abs = self.abspath(to_rel)
1047
rename(from_abs, to_abs)
1049
raise BzrError("failed to rename %r to %r: %s"
1050
% (from_abs, to_abs, e[1]),
1051
["rename rolled back"])
1053
self._write_inventory(inv)
1058
def move(self, from_paths, to_name):
1061
to_name must exist as a versioned directory.
1063
If to_name exists and is a directory, the files are moved into
1064
it, keeping their old names. If it is a directory,
1066
Note that to_name is only the last component of the new name;
1067
this doesn't change the directory.
1069
This returns a list of (from_path, to_path) pairs for each
1070
entry that is moved.
1075
## TODO: Option to move IDs only
1076
assert not isinstance(from_paths, basestring)
1077
tree = self.working_tree()
1078
inv = tree.inventory
1079
to_abs = self.abspath(to_name)
1080
if not isdir(to_abs):
1081
raise BzrError("destination %r is not a directory" % to_abs)
1082
if not tree.has_filename(to_name):
1083
raise BzrError("destination %r not in working directory" % to_abs)
1084
to_dir_id = inv.path2id(to_name)
1085
if to_dir_id == None and to_name != '':
1086
raise BzrError("destination %r is not a versioned directory" % to_name)
1087
to_dir_ie = inv[to_dir_id]
1088
if to_dir_ie.kind not in ('directory', 'root_directory'):
1089
raise BzrError("destination %r is not a directory" % to_abs)
1091
to_idpath = inv.get_idpath(to_dir_id)
1093
for f in from_paths:
1094
if not tree.has_filename(f):
1095
raise BzrError("%r does not exist in working tree" % f)
1096
f_id = inv.path2id(f)
1098
raise BzrError("%r is not versioned" % f)
1099
name_tail = splitpath(f)[-1]
1100
dest_path = appendpath(to_name, name_tail)
1101
if tree.has_filename(dest_path):
1102
raise BzrError("destination %r already exists" % dest_path)
1103
if f_id in to_idpath:
1104
raise BzrError("can't move %r to a subdirectory of itself" % f)
1106
# OK, so there's a race here, it's possible that someone will
1107
# create a file in this interval and then the rename might be
1108
# left half-done. But we should have caught most problems.
1110
for f in from_paths:
1111
name_tail = splitpath(f)[-1]
1112
dest_path = appendpath(to_name, name_tail)
1113
result.append((f, dest_path))
1114
inv.rename(inv.path2id(f), to_dir_id, name_tail)
1116
rename(self.abspath(f), self.abspath(dest_path))
1118
raise BzrError("failed to rename %r to %r: %s" % (f, dest_path, e[1]),
1119
["rename rolled back"])
1121
self._write_inventory(inv)
1128
def revert(self, filenames, old_tree=None, backups=True):
1129
"""Restore selected files to the versions from a previous tree.
1132
If true (default) backups are made of files before
1135
from bzrlib.errors import NotVersionedError, BzrError
1136
from bzrlib.atomicfile import AtomicFile
1137
from bzrlib.osutils import backup_file
1139
inv = self.read_working_inventory()
1140
if old_tree is None:
1141
old_tree = self.basis_tree()
1142
old_inv = old_tree.inventory
1145
for fn in filenames:
1146
file_id = inv.path2id(fn)
1148
raise NotVersionedError("not a versioned file", fn)
1149
if not old_inv.has_id(file_id):
1150
raise BzrError("file not present in old tree", fn, file_id)
1151
nids.append((fn, file_id))
1153
# TODO: Rename back if it was previously at a different location
1155
# TODO: If given a directory, restore the entire contents from
1156
# the previous version.
1158
# TODO: Make a backup to a temporary file.
1160
# TODO: If the file previously didn't exist, delete it?
1161
for fn, file_id in nids:
1164
f = AtomicFile(fn, 'wb')
1166
f.write(old_tree.get_file(file_id).read())
1172
def pending_merges(self):
1173
"""Return a list of pending merges.
1175
These are revisions that have been merged into the working
1176
directory but not yet committed.
1178
cfn = self._rel_controlfilename('pending-merges')
1179
if not self._transport.has(cfn):
1182
for l in self.controlfile('pending-merges', 'r').readlines():
1183
p.append(l.rstrip('\n'))
1187
def add_pending_merge(self, *revision_ids):
1188
# TODO: Perhaps should check at this point that the
1189
# history of the revision is actually present?
1190
for rev_id in revision_ids:
1191
validate_revision_id(rev_id)
1193
p = self.pending_merges()
1195
for rev_id in revision_ids:
1201
self.set_pending_merges(p)
1203
def set_pending_merges(self, rev_list):
1206
self.put_controlfile('pending-merges', '\n'.join(rev_list))
1211
def get_parent(self):
1212
"""Return the parent location of the branch.
1214
This is the default location for push/pull/missing. The usual
1215
pattern is that the user can override it by specifying a
1219
_locs = ['parent', 'pull', 'x-pull']
1222
return self.controlfile(l, 'r').read().strip('\n')
1224
if e.errno != errno.ENOENT:
1229
def set_parent(self, url):
1230
# TODO: Maybe delete old location files?
1231
from bzrlib.atomicfile import AtomicFile
1234
f = AtomicFile(self.controlfilename('parent'))
1243
def check_revno(self, revno):
1245
Check whether a revno corresponds to any revision.
1246
Zero (the NULL revision) is considered valid.
1249
self.check_real_revno(revno)
1251
def check_real_revno(self, revno):
1253
Check whether a revno corresponds to a real revision.
1254
Zero (the NULL revision) is considered invalid
1256
if revno < 1 or revno > self.revno():
1257
raise InvalidRevisionNumber(revno)
1263
class ScratchBranch(_Branch):
1264
"""Special test class: a branch that cleans up after itself.
1266
>>> b = ScratchBranch()
1274
def __init__(self, files=[], dirs=[], base=None):
1275
"""Make a test branch.
1277
This creates a temporary directory and runs init-tree in it.
1279
If any files are listed, they are created in the working copy.
1281
from tempfile import mkdtemp
1286
if isinstance(base, basestring):
1287
base = get_transport(base)
1288
_Branch.__init__(self, base, init=init)
1290
self._transport.mkdir(d)
1293
self._transport.put(f, 'content of %s' % f)
1298
>>> orig = ScratchBranch(files=["file1", "file2"])
1299
>>> clone = orig.clone()
1300
>>> if os.name != 'nt':
1301
... os.path.samefile(orig.base, clone.base)
1303
... orig.base == clone.base
1306
>>> os.path.isfile(os.path.join(clone.base, "file1"))
1309
from shutil import copytree
1310
from tempfile import mkdtemp
1313
copytree(self.base, base, symlinks=True)
1314
return ScratchBranch(base=base)
1320
"""Destroy the test branch, removing the scratch directory."""
1321
from shutil import rmtree
1324
mutter("delete ScratchBranch %s" % self.base)
1327
# Work around for shutil.rmtree failing on Windows when
1328
# readonly files are encountered
1329
mutter("hit exception in destroying ScratchBranch: %s" % e)
1330
for root, dirs, files in os.walk(self.base, topdown=False):
1332
os.chmod(os.path.join(root, name), 0700)
1334
self._transport = None
1338
######################################################################
1342
def is_control_file(filename):
1343
## FIXME: better check
1344
filename = os.path.normpath(filename)
1345
while filename != '':
1346
head, tail = os.path.split(filename)
1347
## mutter('check %r for control file' % ((head, tail), ))
1348
if tail == bzrlib.BZRDIR:
1350
if filename == head:
1357
def gen_file_id(name):
1358
"""Return new file id.
1360
This should probably generate proper UUIDs, but for the moment we
1361
cope with just randomness because running uuidgen every time is
1364
from binascii import hexlify
1365
from time import time
1367
# get last component
1368
idx = name.rfind('/')
1370
name = name[idx+1 : ]
1371
idx = name.rfind('\\')
1373
name = name[idx+1 : ]
1375
# make it not a hidden file
1376
name = name.lstrip('.')
1378
# remove any wierd characters; we don't escape them but rather
1379
# just pull them out
1380
name = re.sub(r'[^\w.]', '', name)
1382
s = hexlify(rand_bytes(8))
1383
return '-'.join((name, compact_date(time()), s))
1387
"""Return a new tree-root file id."""
1388
return gen_file_id('TREE_ROOT')