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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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BZR_BRANCH_FORMAT_6 = "Bazaar-NG branch, format 6\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, prefixed=False):
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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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def get_weave(name, prefixed=False):
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relpath = self._rel_controlfilename(name)
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ws = WeaveStore(self._transport.clone(relpath), prefixed=prefixed)
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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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elif self._branch_format == 6:
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self.control_weaves = get_weave([])
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self.weave_store = get_weave('weaves', prefixed=True)
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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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mutter("lock write: %s (%s)", self, self._lock_count)
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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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mutter("lock read: %s (%s)", self, self._lock_count)
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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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mutter("unlock: %s (%s)", self, self._lock_count)
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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_6),
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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_6:
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self._branch_format = 6
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elif 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 not in (5, 6)):
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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_??
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if kind == 'directory':
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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.
732
>>> b = ScratchBranch(files=['foo', 'foo~'])
733
>>> 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]
773
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):
782
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"""
787
xml_file = self.get_revision_xml_file(revision_id)
790
r = bzrlib.xml5.serializer_v5.read_revision(xml_file)
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except SyntaxError, e:
792
raise bzrlib.errors.BzrError('failed to unpack revision_xml',
796
assert r.revision_id == revision_id
799
def get_revision_delta(self, revno):
800
"""Return the delta for one revision.
802
The delta is relative to its mainline predecessor, or the
803
empty tree for revision 1.
805
assert isinstance(revno, int)
806
rh = self.revision_history()
807
if not (1 <= revno <= len(rh)):
808
raise InvalidRevisionNumber(revno)
810
# revno is 1-based; list is 0-based
812
new_tree = self.revision_tree(rh[revno-1])
814
old_tree = EmptyTree()
816
old_tree = self.revision_tree(rh[revno-2])
818
return compare_trees(old_tree, new_tree)
820
def get_revision_sha1(self, revision_id):
821
"""Hash the stored value of a revision, and return it."""
822
# In the future, revision entries will be signed. At that
823
# point, it is probably best *not* to include the signature
824
# in the revision hash. Because that lets you re-sign
825
# the revision, (add signatures/remove signatures) and still
826
# have all hash pointers stay consistent.
827
# But for now, just hash the contents.
828
return bzrlib.osutils.sha_file(self.get_revision_xml_file(revision_id))
830
def get_ancestry(self, revision_id):
831
"""Return a list of revision-ids integrated by a revision.
833
This currently returns a list, but the ordering is not guaranteed:
836
if revision_id is None:
838
w = self.get_inventory_weave()
839
return [None] + map(w.idx_to_name,
840
w.inclusions([w.lookup(revision_id)]))
842
def get_inventory_weave(self):
843
return self.control_weaves.get_weave('inventory',
844
self.get_transaction())
846
def get_inventory(self, revision_id):
847
"""Get Inventory object by hash."""
848
xml = self.get_inventory_xml(revision_id)
849
return bzrlib.xml5.serializer_v5.read_inventory_from_string(xml)
851
def get_inventory_xml(self, revision_id):
852
"""Get inventory XML as a file object."""
854
assert isinstance(revision_id, basestring), type(revision_id)
855
iw = self.get_inventory_weave()
856
return iw.get_text(iw.lookup(revision_id))
858
raise bzrlib.errors.HistoryMissing(self, 'inventory', revision_id)
860
def get_inventory_sha1(self, revision_id):
861
"""Return the sha1 hash of the inventory entry
863
return self.get_revision(revision_id).inventory_sha1
865
def get_revision_inventory(self, revision_id):
866
"""Return inventory of a past revision."""
867
# TODO: Unify this with get_inventory()
868
# bzr 0.0.6 and later imposes the constraint that the inventory_id
869
# must be the same as its revision, so this is trivial.
870
if revision_id == None:
871
return Inventory(self.get_root_id())
873
return self.get_inventory(revision_id)
875
def revision_history(self):
876
"""Return sequence of revision hashes on to this branch."""
879
return [l.rstrip('\r\n') for l in
880
self.controlfile('revision-history', 'r').readlines()]
884
def common_ancestor(self, other, self_revno=None, other_revno=None):
886
>>> from bzrlib.commit import commit
887
>>> sb = ScratchBranch(files=['foo', 'foo~'])
888
>>> sb.common_ancestor(sb) == (None, None)
890
>>> commit(sb, "Committing first revision", verbose=False)
891
>>> sb.common_ancestor(sb)[0]
893
>>> clone = sb.clone()
894
>>> commit(sb, "Committing second revision", verbose=False)
895
>>> sb.common_ancestor(sb)[0]
897
>>> sb.common_ancestor(clone)[0]
899
>>> commit(clone, "Committing divergent second revision",
901
>>> sb.common_ancestor(clone)[0]
903
>>> sb.common_ancestor(clone) == clone.common_ancestor(sb)
905
>>> sb.common_ancestor(sb) != clone.common_ancestor(clone)
907
>>> clone2 = sb.clone()
908
>>> sb.common_ancestor(clone2)[0]
910
>>> sb.common_ancestor(clone2, self_revno=1)[0]
912
>>> sb.common_ancestor(clone2, other_revno=1)[0]
915
my_history = self.revision_history()
916
other_history = other.revision_history()
917
if self_revno is None:
918
self_revno = len(my_history)
919
if other_revno is None:
920
other_revno = len(other_history)
921
indices = range(min((self_revno, other_revno)))
924
if my_history[r] == other_history[r]:
925
return r+1, my_history[r]
930
"""Return current revision number for this branch.
932
That is equivalent to the number of revisions committed to
935
return len(self.revision_history())
938
def last_revision(self):
939
"""Return last patch hash, or None if no history.
941
ph = self.revision_history()
948
def missing_revisions(self, other, stop_revision=None, diverged_ok=False):
949
"""Return a list of new revisions that would perfectly fit.
951
If self and other have not diverged, return a list of the revisions
952
present in other, but missing from self.
954
>>> from bzrlib.commit import commit
955
>>> bzrlib.trace.silent = True
956
>>> br1 = ScratchBranch()
957
>>> br2 = ScratchBranch()
958
>>> br1.missing_revisions(br2)
960
>>> commit(br2, "lala!", rev_id="REVISION-ID-1")
961
>>> br1.missing_revisions(br2)
963
>>> br2.missing_revisions(br1)
965
>>> commit(br1, "lala!", rev_id="REVISION-ID-1")
966
>>> br1.missing_revisions(br2)
968
>>> commit(br2, "lala!", rev_id="REVISION-ID-2A")
969
>>> br1.missing_revisions(br2)
971
>>> commit(br1, "lala!", rev_id="REVISION-ID-2B")
972
>>> br1.missing_revisions(br2)
973
Traceback (most recent call last):
974
DivergedBranches: These branches have diverged.
976
# FIXME: If the branches have diverged, but the latest
977
# revision in this branch is completely merged into the other,
978
# then we should still be able to pull.
979
self_history = self.revision_history()
980
self_len = len(self_history)
981
other_history = other.revision_history()
982
other_len = len(other_history)
983
common_index = min(self_len, other_len) -1
984
if common_index >= 0 and \
985
self_history[common_index] != other_history[common_index]:
986
raise DivergedBranches(self, other)
988
if stop_revision is None:
989
stop_revision = other_len
991
assert isinstance(stop_revision, int)
992
if stop_revision > other_len:
993
raise bzrlib.errors.NoSuchRevision(self, stop_revision)
994
return other_history[self_len:stop_revision]
996
def update_revisions(self, other, stop_revision=None):
997
"""Pull in new perfect-fit revisions."""
998
from bzrlib.fetch import greedy_fetch
999
from bzrlib.revision import get_intervening_revisions
1000
if stop_revision is None:
1001
stop_revision = other.last_revision()
1002
greedy_fetch(to_branch=self, from_branch=other,
1003
revision=stop_revision)
1004
pullable_revs = self.missing_revisions(
1005
other, other.revision_id_to_revno(stop_revision))
1007
greedy_fetch(to_branch=self,
1009
revision=pullable_revs[-1])
1010
self.append_revision(*pullable_revs)
1013
def commit(self, *args, **kw):
1014
from bzrlib.commit import Commit
1015
Commit().commit(self, *args, **kw)
1017
def revision_id_to_revno(self, revision_id):
1018
"""Given a revision id, return its revno"""
1019
if revision_id is None:
1021
history = self.revision_history()
1023
return history.index(revision_id) + 1
1025
raise bzrlib.errors.NoSuchRevision(self, revision_id)
1027
def get_rev_id(self, revno, history=None):
1028
"""Find the revision id of the specified revno."""
1032
history = self.revision_history()
1033
elif revno <= 0 or revno > len(history):
1034
raise bzrlib.errors.NoSuchRevision(self, revno)
1035
return history[revno - 1]
1037
def revision_tree(self, revision_id):
1038
"""Return Tree for a revision on this branch.
1040
`revision_id` may be None for the null revision, in which case
1041
an `EmptyTree` is returned."""
1042
# TODO: refactor this to use an existing revision object
1043
# so we don't need to read it in twice.
1044
if revision_id == None:
1047
inv = self.get_revision_inventory(revision_id)
1048
return RevisionTree(self.weave_store, inv, revision_id)
1051
def working_tree(self):
1052
"""Return a `Tree` for the working copy."""
1053
from bzrlib.workingtree import WorkingTree
1054
# TODO: In the future, WorkingTree should utilize Transport
1055
# RobertCollins 20051003 - I don't think it should - working trees are
1056
# much more complex to keep consistent than our careful .bzr subset.
1057
# instead, we should say that working trees are local only, and optimise
1059
return WorkingTree(self._transport.base, self.read_working_inventory())
1062
def basis_tree(self):
1063
"""Return `Tree` object for last revision.
1065
If there are no revisions yet, return an `EmptyTree`.
1067
return self.revision_tree(self.last_revision())
1070
def rename_one(self, from_rel, to_rel):
1073
This can change the directory or the filename or both.
1077
tree = self.working_tree()
1078
inv = tree.inventory
1079
if not tree.has_filename(from_rel):
1080
raise BzrError("can't rename: old working file %r does not exist" % from_rel)
1081
if tree.has_filename(to_rel):
1082
raise BzrError("can't rename: new working file %r already exists" % to_rel)
1084
file_id = inv.path2id(from_rel)
1086
raise BzrError("can't rename: old name %r is not versioned" % from_rel)
1088
if inv.path2id(to_rel):
1089
raise BzrError("can't rename: new name %r is already versioned" % to_rel)
1091
to_dir, to_tail = os.path.split(to_rel)
1092
to_dir_id = inv.path2id(to_dir)
1093
if to_dir_id == None and to_dir != '':
1094
raise BzrError("can't determine destination directory id for %r" % to_dir)
1096
mutter("rename_one:")
1097
mutter(" file_id {%s}" % file_id)
1098
mutter(" from_rel %r" % from_rel)
1099
mutter(" to_rel %r" % to_rel)
1100
mutter(" to_dir %r" % to_dir)
1101
mutter(" to_dir_id {%s}" % to_dir_id)
1103
inv.rename(file_id, to_dir_id, to_tail)
1105
from_abs = self.abspath(from_rel)
1106
to_abs = self.abspath(to_rel)
1108
rename(from_abs, to_abs)
1110
raise BzrError("failed to rename %r to %r: %s"
1111
% (from_abs, to_abs, e[1]),
1112
["rename rolled back"])
1114
self._write_inventory(inv)
1119
def move(self, from_paths, to_name):
1122
to_name must exist as a versioned directory.
1124
If to_name exists and is a directory, the files are moved into
1125
it, keeping their old names. If it is a directory,
1127
Note that to_name is only the last component of the new name;
1128
this doesn't change the directory.
1130
This returns a list of (from_path, to_path) pairs for each
1131
entry that is moved.
1136
## TODO: Option to move IDs only
1137
assert not isinstance(from_paths, basestring)
1138
tree = self.working_tree()
1139
inv = tree.inventory
1140
to_abs = self.abspath(to_name)
1141
if not isdir(to_abs):
1142
raise BzrError("destination %r is not a directory" % to_abs)
1143
if not tree.has_filename(to_name):
1144
raise BzrError("destination %r not in working directory" % to_abs)
1145
to_dir_id = inv.path2id(to_name)
1146
if to_dir_id == None and to_name != '':
1147
raise BzrError("destination %r is not a versioned directory" % to_name)
1148
to_dir_ie = inv[to_dir_id]
1149
if to_dir_ie.kind not in ('directory', 'root_directory'):
1150
raise BzrError("destination %r is not a directory" % to_abs)
1152
to_idpath = inv.get_idpath(to_dir_id)
1154
for f in from_paths:
1155
if not tree.has_filename(f):
1156
raise BzrError("%r does not exist in working tree" % f)
1157
f_id = inv.path2id(f)
1159
raise BzrError("%r is not versioned" % f)
1160
name_tail = splitpath(f)[-1]
1161
dest_path = appendpath(to_name, name_tail)
1162
if tree.has_filename(dest_path):
1163
raise BzrError("destination %r already exists" % dest_path)
1164
if f_id in to_idpath:
1165
raise BzrError("can't move %r to a subdirectory of itself" % f)
1167
# OK, so there's a race here, it's possible that someone will
1168
# create a file in this interval and then the rename might be
1169
# left half-done. But we should have caught most problems.
1171
for f in from_paths:
1172
name_tail = splitpath(f)[-1]
1173
dest_path = appendpath(to_name, name_tail)
1174
result.append((f, dest_path))
1175
inv.rename(inv.path2id(f), to_dir_id, name_tail)
1177
rename(self.abspath(f), self.abspath(dest_path))
1179
raise BzrError("failed to rename %r to %r: %s" % (f, dest_path, e[1]),
1180
["rename rolled back"])
1182
self._write_inventory(inv)
1189
def revert(self, filenames, old_tree=None, backups=True):
1190
"""Restore selected files to the versions from a previous tree.
1193
If true (default) backups are made of files before
1196
from bzrlib.errors import NotVersionedError, BzrError
1197
from bzrlib.atomicfile import AtomicFile
1198
from bzrlib.osutils import backup_file
1200
inv = self.read_working_inventory()
1201
if old_tree is None:
1202
old_tree = self.basis_tree()
1203
old_inv = old_tree.inventory
1206
for fn in filenames:
1207
file_id = inv.path2id(fn)
1209
raise NotVersionedError("not a versioned file", fn)
1210
if not old_inv.has_id(file_id):
1211
raise BzrError("file not present in old tree", fn, file_id)
1212
nids.append((fn, file_id))
1214
# TODO: Rename back if it was previously at a different location
1216
# TODO: If given a directory, restore the entire contents from
1217
# the previous version.
1219
# TODO: Make a backup to a temporary file.
1221
# TODO: If the file previously didn't exist, delete it?
1222
for fn, file_id in nids:
1225
f = AtomicFile(fn, 'wb')
1227
f.write(old_tree.get_file(file_id).read())
1233
def pending_merges(self):
1234
"""Return a list of pending merges.
1236
These are revisions that have been merged into the working
1237
directory but not yet committed.
1239
cfn = self._rel_controlfilename('pending-merges')
1240
if not self._transport.has(cfn):
1243
for l in self.controlfile('pending-merges', 'r').readlines():
1244
p.append(l.rstrip('\n'))
1248
def add_pending_merge(self, *revision_ids):
1249
# TODO: Perhaps should check at this point that the
1250
# history of the revision is actually present?
1251
p = self.pending_merges()
1253
for rev_id in revision_ids:
1259
self.set_pending_merges(p)
1261
def set_pending_merges(self, rev_list):
1264
self.put_controlfile('pending-merges', '\n'.join(rev_list))
1269
def get_parent(self):
1270
"""Return the parent location of the branch.
1272
This is the default location for push/pull/missing. The usual
1273
pattern is that the user can override it by specifying a
1277
_locs = ['parent', 'pull', 'x-pull']
1280
return self.controlfile(l, 'r').read().strip('\n')
1282
if e.errno != errno.ENOENT:
1287
def set_parent(self, url):
1288
# TODO: Maybe delete old location files?
1289
from bzrlib.atomicfile import AtomicFile
1292
f = AtomicFile(self.controlfilename('parent'))
1301
def check_revno(self, revno):
1303
Check whether a revno corresponds to any revision.
1304
Zero (the NULL revision) is considered valid.
1307
self.check_real_revno(revno)
1309
def check_real_revno(self, revno):
1311
Check whether a revno corresponds to a real revision.
1312
Zero (the NULL revision) is considered invalid
1314
if revno < 1 or revno > self.revno():
1315
raise InvalidRevisionNumber(revno)
1321
class ScratchBranch(_Branch):
1322
"""Special test class: a branch that cleans up after itself.
1324
>>> b = ScratchBranch()
1332
def __init__(self, files=[], dirs=[], base=None):
1333
"""Make a test branch.
1335
This creates a temporary directory and runs init-tree in it.
1337
If any files are listed, they are created in the working copy.
1339
from tempfile import mkdtemp
1344
if isinstance(base, basestring):
1345
base = get_transport(base)
1346
_Branch.__init__(self, base, init=init)
1348
self._transport.mkdir(d)
1351
self._transport.put(f, 'content of %s' % f)
1356
>>> orig = ScratchBranch(files=["file1", "file2"])
1357
>>> clone = orig.clone()
1358
>>> if os.name != 'nt':
1359
... os.path.samefile(orig.base, clone.base)
1361
... orig.base == clone.base
1364
>>> os.path.isfile(os.path.join(clone.base, "file1"))
1367
from shutil import copytree
1368
from tempfile import mkdtemp
1371
copytree(self.base, base, symlinks=True)
1372
return ScratchBranch(base=base)
1378
"""Destroy the test branch, removing the scratch directory."""
1379
from shutil import rmtree
1382
mutter("delete ScratchBranch %s" % self.base)
1385
# Work around for shutil.rmtree failing on Windows when
1386
# readonly files are encountered
1387
mutter("hit exception in destroying ScratchBranch: %s" % e)
1388
for root, dirs, files in os.walk(self.base, topdown=False):
1390
os.chmod(os.path.join(root, name), 0700)
1392
self._transport = None
1396
######################################################################
1400
def is_control_file(filename):
1401
## FIXME: better check
1402
filename = os.path.normpath(filename)
1403
while filename != '':
1404
head, tail = os.path.split(filename)
1405
## mutter('check %r for control file' % ((head, tail), ))
1406
if tail == bzrlib.BZRDIR:
1408
if filename == head:
1415
def gen_file_id(name):
1416
"""Return new file id.
1418
This should probably generate proper UUIDs, but for the moment we
1419
cope with just randomness because running uuidgen every time is
1422
from binascii import hexlify
1423
from time import time
1425
# get last component
1426
idx = name.rfind('/')
1428
name = name[idx+1 : ]
1429
idx = name.rfind('\\')
1431
name = name[idx+1 : ]
1433
# make it not a hidden file
1434
name = name.lstrip('.')
1436
# remove any wierd characters; we don't escape them but rather
1437
# just pull them out
1438
name = re.sub(r'[^\w.]', '', name)
1440
s = hexlify(rand_bytes(8))
1441
return '-'.join((name, compact_date(time()), s))
1445
"""Return a new tree-root file id."""
1446
return gen_file_id('TREE_ROOT')