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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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import bzrlib.inventory as inventory
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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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import bzrlib.errors as errors
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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
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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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import bzrlib.transactions as transactions
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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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mutter("trying to open %r with transport %r", base, t)
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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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self.cache_root = 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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# FIXME: This approach of assuming stores are all entirely compressed
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# or entirely uncompressed is tidy, but breaks upgrade from
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# some existing branches where there's a mixture; we probably
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# still want the option to look for both.
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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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# cache_path = os.path.join(self.cache_root, name)
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# os.mkdir(cache_path)
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# store = bzrlib.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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self._transaction = None
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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 _finish_transaction(self):
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"""Exit the current transaction."""
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if self._transaction is None:
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raise errors.LockError('Branch %s is not in a transaction' %
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transaction = self._transaction
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self._transaction = None
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def get_transaction(self):
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"""Return the current active transaction.
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If no transaction is active, this returns a passthrough object
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for which all data is immedaitely flushed and no caching happens.
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if self._transaction is None:
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return transactions.PassThroughTransaction()
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return self._transaction
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def _set_transaction(self, new_transaction):
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"""Set a new active transaction."""
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if self._transaction is not None:
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raise errors.LockError('Branch %s is in a transaction already.' %
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self._transaction = new_transaction
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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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self._set_transaction(transactions.PassThroughTransaction())
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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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self._set_transaction(transactions.ReadOnlyTransaction())
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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._finish_transaction()
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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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mutter("got branch format %r", fmt)
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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 errors.UnsupportedFormatError(
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'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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# fixme, there should be a factory function inv,add_??
703
if kind == 'directory':
704
inv.add(inventory.InventoryDirectory(file_id, name, parent))
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inv.add(inventory.InventoryFile(file_id, name, parent))
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elif kind == 'symlink':
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inv.add(inventory.InventoryLink(file_id, name, parent))
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raise BzrError("unknown kind %r" % kind)
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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.
719
>>> 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
747
or on the mainline."""
748
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)
778
except SyntaxError, e:
779
raise bzrlib.errors.BzrError('failed to unpack revision_xml',
783
assert r.revision_id == revision_id
786
def get_revision_delta(self, revno):
787
"""Return the delta for one revision.
789
The delta is relative to its mainline predecessor, or the
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empty tree for revision 1.
792
assert isinstance(revno, int)
793
rh = self.revision_history()
794
if not (1 <= revno <= len(rh)):
795
raise InvalidRevisionNumber(revno)
797
# revno is 1-based; list is 0-based
799
new_tree = self.revision_tree(rh[revno-1])
801
old_tree = EmptyTree()
803
old_tree = self.revision_tree(rh[revno-2])
805
return compare_trees(old_tree, new_tree)
807
def get_revision_sha1(self, revision_id):
808
"""Hash the stored value of a revision, and return it."""
809
# In the future, revision entries will be signed. At that
810
# point, it is probably best *not* to include the signature
811
# in the revision hash. Because that lets you re-sign
812
# the revision, (add signatures/remove signatures) and still
813
# have all hash pointers stay consistent.
814
# But for now, just hash the contents.
815
return bzrlib.osutils.sha_file(self.get_revision_xml_file(revision_id))
817
def get_ancestry(self, revision_id):
818
"""Return a list of revision-ids integrated by a revision.
820
This currently returns a list, but the ordering is not guaranteed:
823
if revision_id is None:
825
w = self.get_inventory_weave()
826
return [None] + map(w.idx_to_name,
827
w.inclusions([w.lookup(revision_id)]))
829
def get_inventory_weave(self):
830
return self.control_weaves.get_weave('inventory',
831
self.get_transaction())
833
def get_inventory(self, revision_id):
834
"""Get Inventory object by hash."""
835
xml = self.get_inventory_xml(revision_id)
836
return bzrlib.xml5.serializer_v5.read_inventory_from_string(xml)
838
def get_inventory_xml(self, revision_id):
839
"""Get inventory XML as a file object."""
841
assert isinstance(revision_id, basestring), type(revision_id)
842
iw = self.get_inventory_weave()
843
return iw.get_text(iw.lookup(revision_id))
845
raise bzrlib.errors.HistoryMissing(self, 'inventory', revision_id)
847
def get_inventory_sha1(self, revision_id):
848
"""Return the sha1 hash of the inventory entry
850
return self.get_revision(revision_id).inventory_sha1
852
def get_revision_inventory(self, revision_id):
853
"""Return inventory of a past revision."""
854
# TODO: Unify this with get_inventory()
855
# bzr 0.0.6 and later imposes the constraint that the inventory_id
856
# must be the same as its revision, so this is trivial.
857
if revision_id == None:
858
return Inventory(self.get_root_id())
860
return self.get_inventory(revision_id)
862
def revision_history(self):
863
"""Return sequence of revision hashes on to this branch."""
866
return [l.rstrip('\r\n') for l in
867
self.controlfile('revision-history', 'r').readlines()]
871
def common_ancestor(self, other, self_revno=None, other_revno=None):
873
>>> from bzrlib.commit import commit
874
>>> sb = ScratchBranch(files=['foo', 'foo~'])
875
>>> sb.common_ancestor(sb) == (None, None)
877
>>> commit(sb, "Committing first revision", verbose=False)
878
>>> sb.common_ancestor(sb)[0]
880
>>> clone = sb.clone()
881
>>> commit(sb, "Committing second revision", verbose=False)
882
>>> sb.common_ancestor(sb)[0]
884
>>> sb.common_ancestor(clone)[0]
886
>>> commit(clone, "Committing divergent second revision",
888
>>> sb.common_ancestor(clone)[0]
890
>>> sb.common_ancestor(clone) == clone.common_ancestor(sb)
892
>>> sb.common_ancestor(sb) != clone.common_ancestor(clone)
894
>>> clone2 = sb.clone()
895
>>> sb.common_ancestor(clone2)[0]
897
>>> sb.common_ancestor(clone2, self_revno=1)[0]
899
>>> sb.common_ancestor(clone2, other_revno=1)[0]
902
my_history = self.revision_history()
903
other_history = other.revision_history()
904
if self_revno is None:
905
self_revno = len(my_history)
906
if other_revno is None:
907
other_revno = len(other_history)
908
indices = range(min((self_revno, other_revno)))
911
if my_history[r] == other_history[r]:
912
return r+1, my_history[r]
917
"""Return current revision number for this branch.
919
That is equivalent to the number of revisions committed to
922
return len(self.revision_history())
925
def last_revision(self):
926
"""Return last patch hash, or None if no history.
928
ph = self.revision_history()
935
def missing_revisions(self, other, stop_revision=None, diverged_ok=False):
936
"""Return a list of new revisions that would perfectly fit.
938
If self and other have not diverged, return a list of the revisions
939
present in other, but missing from self.
941
>>> from bzrlib.commit import commit
942
>>> bzrlib.trace.silent = True
943
>>> br1 = ScratchBranch()
944
>>> br2 = ScratchBranch()
945
>>> br1.missing_revisions(br2)
947
>>> commit(br2, "lala!", rev_id="REVISION-ID-1")
948
>>> br1.missing_revisions(br2)
950
>>> br2.missing_revisions(br1)
952
>>> commit(br1, "lala!", rev_id="REVISION-ID-1")
953
>>> br1.missing_revisions(br2)
955
>>> commit(br2, "lala!", rev_id="REVISION-ID-2A")
956
>>> br1.missing_revisions(br2)
958
>>> commit(br1, "lala!", rev_id="REVISION-ID-2B")
959
>>> br1.missing_revisions(br2)
960
Traceback (most recent call last):
961
DivergedBranches: These branches have diverged.
963
# FIXME: If the branches have diverged, but the latest
964
# revision in this branch is completely merged into the other,
965
# then we should still be able to pull.
966
self_history = self.revision_history()
967
self_len = len(self_history)
968
other_history = other.revision_history()
969
other_len = len(other_history)
970
common_index = min(self_len, other_len) -1
971
if common_index >= 0 and \
972
self_history[common_index] != other_history[common_index]:
973
raise DivergedBranches(self, other)
975
if stop_revision is None:
976
stop_revision = other_len
978
assert isinstance(stop_revision, int)
979
if stop_revision > other_len:
980
raise bzrlib.errors.NoSuchRevision(self, stop_revision)
981
return other_history[self_len:stop_revision]
983
def update_revisions(self, other, stop_revision=None):
984
"""Pull in new perfect-fit revisions."""
985
from bzrlib.fetch import greedy_fetch
986
from bzrlib.revision import get_intervening_revisions
987
if stop_revision is None:
988
stop_revision = other.last_revision()
989
greedy_fetch(to_branch=self, from_branch=other,
990
revision=stop_revision)
991
pullable_revs = self.missing_revisions(
992
other, other.revision_id_to_revno(stop_revision))
994
greedy_fetch(to_branch=self,
996
revision=pullable_revs[-1])
997
self.append_revision(*pullable_revs)
1000
def commit(self, *args, **kw):
1001
from bzrlib.commit import Commit
1002
Commit().commit(self, *args, **kw)
1004
def revision_id_to_revno(self, revision_id):
1005
"""Given a revision id, return its revno"""
1006
if revision_id is None:
1008
history = self.revision_history()
1010
return history.index(revision_id) + 1
1012
raise bzrlib.errors.NoSuchRevision(self, revision_id)
1014
def get_rev_id(self, revno, history=None):
1015
"""Find the revision id of the specified revno."""
1019
history = self.revision_history()
1020
elif revno <= 0 or revno > len(history):
1021
raise bzrlib.errors.NoSuchRevision(self, revno)
1022
return history[revno - 1]
1024
def revision_tree(self, revision_id):
1025
"""Return Tree for a revision on this branch.
1027
`revision_id` may be None for the null revision, in which case
1028
an `EmptyTree` is returned."""
1029
# TODO: refactor this to use an existing revision object
1030
# so we don't need to read it in twice.
1031
if revision_id == None:
1034
inv = self.get_revision_inventory(revision_id)
1035
return RevisionTree(self.weave_store, inv, revision_id)
1038
def working_tree(self):
1039
"""Return a `Tree` for the working copy."""
1040
from bzrlib.workingtree import WorkingTree
1041
# TODO: In the future, WorkingTree should utilize Transport
1042
# RobertCollins 20051003 - I don't think it should - working trees are
1043
# much more complex to keep consistent than our careful .bzr subset.
1044
# instead, we should say that working trees are local only, and optimise
1046
return WorkingTree(self._transport.base, self.read_working_inventory())
1049
def basis_tree(self):
1050
"""Return `Tree` object for last revision.
1052
If there are no revisions yet, return an `EmptyTree`.
1054
return self.revision_tree(self.last_revision())
1057
def rename_one(self, from_rel, to_rel):
1060
This can change the directory or the filename or both.
1064
tree = self.working_tree()
1065
inv = tree.inventory
1066
if not tree.has_filename(from_rel):
1067
raise BzrError("can't rename: old working file %r does not exist" % from_rel)
1068
if tree.has_filename(to_rel):
1069
raise BzrError("can't rename: new working file %r already exists" % to_rel)
1071
file_id = inv.path2id(from_rel)
1073
raise BzrError("can't rename: old name %r is not versioned" % from_rel)
1075
if inv.path2id(to_rel):
1076
raise BzrError("can't rename: new name %r is already versioned" % to_rel)
1078
to_dir, to_tail = os.path.split(to_rel)
1079
to_dir_id = inv.path2id(to_dir)
1080
if to_dir_id == None and to_dir != '':
1081
raise BzrError("can't determine destination directory id for %r" % to_dir)
1083
mutter("rename_one:")
1084
mutter(" file_id {%s}" % file_id)
1085
mutter(" from_rel %r" % from_rel)
1086
mutter(" to_rel %r" % to_rel)
1087
mutter(" to_dir %r" % to_dir)
1088
mutter(" to_dir_id {%s}" % to_dir_id)
1090
inv.rename(file_id, to_dir_id, to_tail)
1092
from_abs = self.abspath(from_rel)
1093
to_abs = self.abspath(to_rel)
1095
rename(from_abs, to_abs)
1097
raise BzrError("failed to rename %r to %r: %s"
1098
% (from_abs, to_abs, e[1]),
1099
["rename rolled back"])
1101
self._write_inventory(inv)
1106
def move(self, from_paths, to_name):
1109
to_name must exist as a versioned directory.
1111
If to_name exists and is a directory, the files are moved into
1112
it, keeping their old names. If it is a directory,
1114
Note that to_name is only the last component of the new name;
1115
this doesn't change the directory.
1117
This returns a list of (from_path, to_path) pairs for each
1118
entry that is moved.
1123
## TODO: Option to move IDs only
1124
assert not isinstance(from_paths, basestring)
1125
tree = self.working_tree()
1126
inv = tree.inventory
1127
to_abs = self.abspath(to_name)
1128
if not isdir(to_abs):
1129
raise BzrError("destination %r is not a directory" % to_abs)
1130
if not tree.has_filename(to_name):
1131
raise BzrError("destination %r not in working directory" % to_abs)
1132
to_dir_id = inv.path2id(to_name)
1133
if to_dir_id == None and to_name != '':
1134
raise BzrError("destination %r is not a versioned directory" % to_name)
1135
to_dir_ie = inv[to_dir_id]
1136
if to_dir_ie.kind not in ('directory', 'root_directory'):
1137
raise BzrError("destination %r is not a directory" % to_abs)
1139
to_idpath = inv.get_idpath(to_dir_id)
1141
for f in from_paths:
1142
if not tree.has_filename(f):
1143
raise BzrError("%r does not exist in working tree" % f)
1144
f_id = inv.path2id(f)
1146
raise BzrError("%r is not versioned" % f)
1147
name_tail = splitpath(f)[-1]
1148
dest_path = appendpath(to_name, name_tail)
1149
if tree.has_filename(dest_path):
1150
raise BzrError("destination %r already exists" % dest_path)
1151
if f_id in to_idpath:
1152
raise BzrError("can't move %r to a subdirectory of itself" % f)
1154
# OK, so there's a race here, it's possible that someone will
1155
# create a file in this interval and then the rename might be
1156
# left half-done. But we should have caught most problems.
1158
for f in from_paths:
1159
name_tail = splitpath(f)[-1]
1160
dest_path = appendpath(to_name, name_tail)
1161
result.append((f, dest_path))
1162
inv.rename(inv.path2id(f), to_dir_id, name_tail)
1164
rename(self.abspath(f), self.abspath(dest_path))
1166
raise BzrError("failed to rename %r to %r: %s" % (f, dest_path, e[1]),
1167
["rename rolled back"])
1169
self._write_inventory(inv)
1176
def revert(self, filenames, old_tree=None, backups=True):
1177
"""Restore selected files to the versions from a previous tree.
1180
If true (default) backups are made of files before
1183
from bzrlib.errors import NotVersionedError, BzrError
1184
from bzrlib.atomicfile import AtomicFile
1185
from bzrlib.osutils import backup_file
1187
inv = self.read_working_inventory()
1188
if old_tree is None:
1189
old_tree = self.basis_tree()
1190
old_inv = old_tree.inventory
1193
for fn in filenames:
1194
file_id = inv.path2id(fn)
1196
raise NotVersionedError("not a versioned file", fn)
1197
if not old_inv.has_id(file_id):
1198
raise BzrError("file not present in old tree", fn, file_id)
1199
nids.append((fn, file_id))
1201
# TODO: Rename back if it was previously at a different location
1203
# TODO: If given a directory, restore the entire contents from
1204
# the previous version.
1206
# TODO: Make a backup to a temporary file.
1208
# TODO: If the file previously didn't exist, delete it?
1209
for fn, file_id in nids:
1212
f = AtomicFile(fn, 'wb')
1214
f.write(old_tree.get_file(file_id).read())
1220
def pending_merges(self):
1221
"""Return a list of pending merges.
1223
These are revisions that have been merged into the working
1224
directory but not yet committed.
1226
cfn = self._rel_controlfilename('pending-merges')
1227
if not self._transport.has(cfn):
1230
for l in self.controlfile('pending-merges', 'r').readlines():
1231
p.append(l.rstrip('\n'))
1235
def add_pending_merge(self, *revision_ids):
1236
# TODO: Perhaps should check at this point that the
1237
# history of the revision is actually present?
1238
p = self.pending_merges()
1240
for rev_id in revision_ids:
1246
self.set_pending_merges(p)
1248
def set_pending_merges(self, rev_list):
1251
self.put_controlfile('pending-merges', '\n'.join(rev_list))
1256
def get_parent(self):
1257
"""Return the parent location of the branch.
1259
This is the default location for push/pull/missing. The usual
1260
pattern is that the user can override it by specifying a
1264
_locs = ['parent', 'pull', 'x-pull']
1267
return self.controlfile(l, 'r').read().strip('\n')
1269
if e.errno != errno.ENOENT:
1274
def set_parent(self, url):
1275
# TODO: Maybe delete old location files?
1276
from bzrlib.atomicfile import AtomicFile
1279
f = AtomicFile(self.controlfilename('parent'))
1288
def check_revno(self, revno):
1290
Check whether a revno corresponds to any revision.
1291
Zero (the NULL revision) is considered valid.
1294
self.check_real_revno(revno)
1296
def check_real_revno(self, revno):
1298
Check whether a revno corresponds to a real revision.
1299
Zero (the NULL revision) is considered invalid
1301
if revno < 1 or revno > self.revno():
1302
raise InvalidRevisionNumber(revno)
1308
class ScratchBranch(_Branch):
1309
"""Special test class: a branch that cleans up after itself.
1311
>>> b = ScratchBranch()
1319
def __init__(self, files=[], dirs=[], base=None):
1320
"""Make a test branch.
1322
This creates a temporary directory and runs init-tree in it.
1324
If any files are listed, they are created in the working copy.
1326
from tempfile import mkdtemp
1331
if isinstance(base, basestring):
1332
base = get_transport(base)
1333
_Branch.__init__(self, base, init=init)
1335
self._transport.mkdir(d)
1338
self._transport.put(f, 'content of %s' % f)
1343
>>> orig = ScratchBranch(files=["file1", "file2"])
1344
>>> clone = orig.clone()
1345
>>> if os.name != 'nt':
1346
... os.path.samefile(orig.base, clone.base)
1348
... orig.base == clone.base
1351
>>> os.path.isfile(os.path.join(clone.base, "file1"))
1354
from shutil import copytree
1355
from tempfile import mkdtemp
1358
copytree(self.base, base, symlinks=True)
1359
return ScratchBranch(base=base)
1365
"""Destroy the test branch, removing the scratch directory."""
1366
from shutil import rmtree
1369
mutter("delete ScratchBranch %s" % self.base)
1372
# Work around for shutil.rmtree failing on Windows when
1373
# readonly files are encountered
1374
mutter("hit exception in destroying ScratchBranch: %s" % e)
1375
for root, dirs, files in os.walk(self.base, topdown=False):
1377
os.chmod(os.path.join(root, name), 0700)
1379
self._transport = None
1383
######################################################################
1387
def is_control_file(filename):
1388
## FIXME: better check
1389
filename = os.path.normpath(filename)
1390
while filename != '':
1391
head, tail = os.path.split(filename)
1392
## mutter('check %r for control file' % ((head, tail), ))
1393
if tail == bzrlib.BZRDIR:
1395
if filename == head:
1402
def gen_file_id(name):
1403
"""Return new file id.
1405
This should probably generate proper UUIDs, but for the moment we
1406
cope with just randomness because running uuidgen every time is
1409
from binascii import hexlify
1410
from time import time
1412
# get last component
1413
idx = name.rfind('/')
1415
name = name[idx+1 : ]
1416
idx = name.rfind('\\')
1418
name = name[idx+1 : ]
1420
# make it not a hidden file
1421
name = name.lstrip('.')
1423
# remove any wierd characters; we don't escape them but rather
1424
# just pull them out
1425
name = re.sub(r'[^\w.]', '', name)
1427
s = hexlify(rand_bytes(8))
1428
return '-'.join((name, compact_date(time()), s))
1432
"""Return a new tree-root file id."""
1433
return gen_file_id('TREE_ROOT')