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- Committer: Martin Pool
- Date: 2005-06-30 10:00:57 UTC
- mto: This revision was merged to the branch mainline in revision 852.
- Revision ID: mbp@sourcefrog.net-20050630100057-32a93074b0f1faa8
doc
- files added:
- .bzrignore
- files removed:
- .bzrignore
- bzrlib
- bzrlib/plugins
- bzrlib/selftest
- bzrlib/store
- bzrlib/transport
- bzrlib/util
- bzrlib/util/effbot
- bzrlib/util/effbot/org
- bzrlib/util/elementtree
- bzrlib/util/urlgrabber
- contrib
- contrib/bash
- contrib/emacs
- contrib/zsh
- doc
- notes
- patches
- tools
- files renamed:
- tools/convertfile.py => convertfile.py
- tools/convertinv.py => convertinv.py
- bzrlib/selftest/test_weave.py => testweave.py
- bzrlib/weave.py => weave.py
- bzrlib/weavefile.py => weavefile.py
added
removed
bzrlib/branch.py
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# Copyright (C) 2005 Canonical Ltd
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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import sys
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import os
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import errno
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from warnings import warn
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from cStringIO import StringIO
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import bzrlib
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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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file_kind)
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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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import bzrlib.xml5
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import bzrlib.ui
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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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s = []
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head = rp
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while len(head) >= len(base):
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if head == base:
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break
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head, tail = os.path.split(head)
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if tail:
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s.insert(0, tail)
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else:
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raise NotBranchError("path %r is not within branch %r" % (rp, base))
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return os.sep.join(s)
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######################################################################
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# branch objects
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class Branch(object):
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"""Branch holding a history of revisions.
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base
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Base directory/url of the branch.
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"""
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base = None
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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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@staticmethod
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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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@staticmethod
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def open(base):
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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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return _Branch(t)
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@staticmethod
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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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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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"""
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t = get_transport(url)
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while True:
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try:
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return _Branch(t)
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except NotBranchError:
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pass
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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' % url)
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t = new_t
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@staticmethod
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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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"""
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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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_lock_mode
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None, or 'r' or 'w'
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_lock_count
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If _lock_mode is true, a positive count of the number of times the
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lock has been taken.
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_lock
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Lock object from bzrlib.lock.
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"""
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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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_lock_mode = None
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_lock_count = None
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_lock = None
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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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return
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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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try:
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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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be versioned.
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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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"""
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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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if init:
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self._make_control()
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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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if compressed:
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store = CompressedTextStore(self._transport.clone(relpath),
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prefixed=prefixed)
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else:
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store = TextStore(self._transport.clone(relpath),
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prefixed=prefixed)
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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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return store
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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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return ws
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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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prefixed=True)
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self._transaction = None
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def __str__(self):
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return '%s(%r)' % (self.__class__.__name__, self._transport.base)
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__repr__ = __str__
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def __del__(self):
281
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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self._lock.unlock()
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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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try:
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import shutil
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shutil.rmtree(self.cache_root)
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except:
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pass
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self.cache_root = None
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def _get_base(self):
302
if self._transport:
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return self._transport.base
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return None
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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:
311
raise errors.LockError('Branch %s is not in a transaction' %
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self)
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transaction = self._transaction
314
self._transaction = None
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transaction.finish()
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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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"""
323
if self._transaction is None:
324
return transactions.PassThroughTransaction()
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else:
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return self._transaction
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def _set_transaction(self, new_transaction):
329
"""Set a new active transaction."""
330
if self._transaction is not None:
331
raise errors.LockError('Branch %s is in a transaction already.' %
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self)
333
self._transaction = new_transaction
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335
def lock_write(self):
336
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
339
if self._lock_mode:
340
if self._lock_mode != 'w':
341
raise LockError("can't upgrade to a write lock from %r" %
342
self._lock_mode)
343
self._lock_count += 1
344
else:
345
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._lock_count = 1
349
self._set_transaction(transactions.PassThroughTransaction())
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def lock_read(self):
352
mutter("lock read: %s (%s)", self, self._lock_count)
353
if self._lock_mode:
354
assert self._lock_mode in ('r', 'w'), \
355
"invalid lock mode %r" % self._lock_mode
356
self._lock_count += 1
357
else:
358
self._lock = self._transport.lock_read(
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self._rel_controlfilename('branch-lock'))
360
self._lock_mode = 'r'
361
self._lock_count = 1
362
self._set_transaction(transactions.ReadOnlyTransaction())
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# 5K may be excessive, but hey, its a knob.
364
self.get_transaction().set_cache_size(5000)
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def unlock(self):
367
mutter("unlock: %s (%s)", self, self._lock_count)
368
if not self._lock_mode:
369
raise LockError('branch %r is not locked' % (self))
370
371
if self._lock_count > 1:
372
self._lock_count -= 1
373
else:
374
self._finish_transaction()
375
self._lock.unlock()
376
self._lock = None
377
self._lock_mode = self._lock_count = None
378
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def abspath(self, name):
380
"""Return absolute filename for something in the branch"""
381
return self._transport.abspath(name)
382
383
def relpath(self, path):
384
"""Return path relative to this branch of something inside it.
385
386
Raises an error if path is not in this branch."""
387
return self._transport.relpath(path)
388
389
390
def _rel_controlfilename(self, file_or_path):
391
if isinstance(file_or_path, basestring):
392
file_or_path = [file_or_path]
393
return [bzrlib.BZRDIR] + file_or_path
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395
def controlfilename(self, file_or_path):
396
"""Return location relative to branch."""
397
return self._transport.abspath(self._rel_controlfilename(file_or_path))
398
399
400
def controlfile(self, file_or_path, mode='r'):
401
"""Open a control file for this branch.
402
403
There are two classes of file in the control directory: text
404
and binary. binary files are untranslated byte streams. Text
405
control files are stored with Unix newlines and in UTF-8, even
406
if the platform or locale defaults are different.
407
408
Controlfiles should almost never be opened in write mode but
409
rather should be atomically copied and replaced using atomicfile.
410
"""
411
import codecs
412
413
relpath = self._rel_controlfilename(file_or_path)
414
#TODO: codecs.open() buffers linewise, so it was overloaded with
415
# a much larger buffer, do we need to do the same for getreader/getwriter?
416
if mode == 'rb':
417
return self._transport.get(relpath)
418
elif mode == 'wb':
419
raise BzrError("Branch.controlfile(mode='wb') is not supported, use put_controlfiles")
420
elif mode == 'r':
421
return codecs.getreader('utf-8')(self._transport.get(relpath), errors='replace')
422
elif mode == 'w':
423
raise BzrError("Branch.controlfile(mode='w') is not supported, use put_controlfiles")
424
else:
425
raise BzrError("invalid controlfile mode %r" % mode)
426
427
def put_controlfile(self, path, f, encode=True):
428
"""Write an entry as a controlfile.
429
430
:param path: The path to put the file, relative to the .bzr control
431
directory
432
:param f: A file-like or string object whose contents should be copied.
433
:param encode: If true, encode the contents as utf-8
434
"""
435
self.put_controlfiles([(path, f)], encode=encode)
436
437
def put_controlfiles(self, files, encode=True):
438
"""Write several entries as controlfiles.
439
440
:param files: A list of [(path, file)] pairs, where the path is the directory
441
underneath the bzr control directory
442
:param encode: If true, encode the contents as utf-8
443
"""
444
import codecs
445
ctrl_files = []
446
for path, f in files:
447
if encode:
448
if isinstance(f, basestring):
449
f = f.encode('utf-8', 'replace')
450
else:
451
f = codecs.getwriter('utf-8')(f, errors='replace')
452
path = self._rel_controlfilename(path)
453
ctrl_files.append((path, f))
454
self._transport.put_multi(ctrl_files)
455
456
def _make_control(self):
457
from bzrlib.inventory import Inventory
458
from bzrlib.weavefile import write_weave_v5
459
from bzrlib.weave import Weave
460
461
# Create an empty inventory
462
sio = StringIO()
463
# if we want per-tree root ids then this is the place to set
464
# them; they're not needed for now and so ommitted for
465
# simplicity.
466
bzrlib.xml5.serializer_v5.write_inventory(Inventory(), sio)
467
empty_inv = sio.getvalue()
468
sio = StringIO()
469
bzrlib.weavefile.write_weave_v5(Weave(), sio)
470
empty_weave = sio.getvalue()
471
472
dirs = [[], 'revision-store', 'weaves']
473
files = [('README',
474
"This is a Bazaar-NG control directory.\n"
475
"Do not change any files in this directory.\n"),
476
('branch-format', BZR_BRANCH_FORMAT_6),
477
('revision-history', ''),
478
('branch-name', ''),
479
('branch-lock', ''),
480
('pending-merges', ''),
481
('inventory', empty_inv),
482
('inventory.weave', empty_weave),
483
('ancestry.weave', empty_weave)
484
]
485
cfn = self._rel_controlfilename
486
self._transport.mkdir_multi([cfn(d) for d in dirs])
487
self.put_controlfiles(files)
488
mutter('created control directory in ' + self._transport.base)
489
490
def _check_format(self, relax_version_check):
491
"""Check this branch format is supported.
492
493
The format level is stored, as an integer, in
494
self._branch_format for code that needs to check it later.
495
496
In the future, we might need different in-memory Branch
497
classes to support downlevel branches. But not yet.
498
"""
499
try:
500
fmt = self.controlfile('branch-format', 'r').read()
501
except NoSuchFile:
502
raise NotBranchError(self.base)
503
mutter("got branch format %r", fmt)
504
if fmt == BZR_BRANCH_FORMAT_6:
505
self._branch_format = 6
506
elif fmt == BZR_BRANCH_FORMAT_5:
507
self._branch_format = 5
508
elif fmt == BZR_BRANCH_FORMAT_4:
509
self._branch_format = 4
510
511
if (not relax_version_check
512
and self._branch_format not in (5, 6)):
513
raise errors.UnsupportedFormatError(
514
'sorry, branch format %r not supported' % fmt,
515
['use a different bzr version',
516
'or remove the .bzr directory'
517
' and "bzr init" again'])
518
519
def get_root_id(self):
520
"""Return the id of this branches root"""
521
inv = self.read_working_inventory()
522
return inv.root.file_id
523
524
def set_root_id(self, file_id):
525
inv = self.read_working_inventory()
526
orig_root_id = inv.root.file_id
527
del inv._byid[inv.root.file_id]
528
inv.root.file_id = file_id
529
inv._byid[inv.root.file_id] = inv.root
530
for fid in inv:
531
entry = inv[fid]
532
if entry.parent_id in (None, orig_root_id):
533
entry.parent_id = inv.root.file_id
534
self._write_inventory(inv)
535
536
def read_working_inventory(self):
537
"""Read the working inventory."""
538
self.lock_read()
539
try:
540
# ElementTree does its own conversion from UTF-8, so open in
541
# binary.
542
f = self.controlfile('inventory', 'rb')
543
return bzrlib.xml5.serializer_v5.read_inventory(f)
544
finally:
545
self.unlock()
546
547
548
def _write_inventory(self, inv):
549
"""Update the working inventory.
550
551
That is to say, the inventory describing changes underway, that
552
will be committed to the next revision.
553
"""
554
from cStringIO import StringIO
555
self.lock_write()
556
try:
557
sio = StringIO()
558
bzrlib.xml5.serializer_v5.write_inventory(inv, sio)
559
sio.seek(0)
560
# Transport handles atomicity
561
self.put_controlfile('inventory', sio)
562
finally:
563
self.unlock()
564
565
mutter('wrote working inventory')
566
567
inventory = property(read_working_inventory, _write_inventory, None,
568
"""Inventory for the working copy.""")
569
570
def add(self, files, ids=None):
571
"""Make files versioned.
572
573
Note that the command line normally calls smart_add instead,
574
which can automatically recurse.
575
576
This puts the files in the Added state, so that they will be
577
recorded by the next commit.
578
579
files
580
List of paths to add, relative to the base of the tree.
581
582
ids
583
If set, use these instead of automatically generated ids.
584
Must be the same length as the list of files, but may
585
contain None for ids that are to be autogenerated.
586
587
TODO: Perhaps have an option to add the ids even if the files do
588
not (yet) exist.
589
590
TODO: Perhaps yield the ids and paths as they're added.
591
"""
592
# TODO: Re-adding a file that is removed in the working copy
593
# should probably put it back with the previous ID.
594
if isinstance(files, basestring):
595
assert(ids is None or isinstance(ids, basestring))
596
files = [files]
597
if ids is not None:
598
ids = [ids]
599
600
if ids is None:
601
ids = [None] * len(files)
602
else:
603
assert(len(ids) == len(files))
604
605
self.lock_write()
606
try:
607
inv = self.read_working_inventory()
608
for f,file_id in zip(files, ids):
609
if is_control_file(f):
610
raise BzrError("cannot add control file %s" % quotefn(f))
611
612
fp = splitpath(f)
613
614
if len(fp) == 0:
615
raise BzrError("cannot add top-level %r" % f)
616
617
fullpath = os.path.normpath(self.abspath(f))
618
619
try:
620
kind = file_kind(fullpath)
621
except OSError:
622
# maybe something better?
623
raise BzrError('cannot add: not a regular file, symlink or directory: %s' % quotefn(f))
624
625
if not InventoryEntry.versionable_kind(kind):
626
raise BzrError('cannot add: not a versionable file ('
627
'i.e. regular file, symlink or directory): %s' % quotefn(f))
628
629
if file_id is None:
630
file_id = gen_file_id(f)
631
inv.add_path(f, kind=kind, file_id=file_id)
632
633
mutter("add file %s file_id:{%s} kind=%r" % (f, file_id, kind))
634
635
self._write_inventory(inv)
636
finally:
637
self.unlock()
638
639
640
def print_file(self, file, revno):
641
"""Print `file` to stdout."""
642
self.lock_read()
643
try:
644
tree = self.revision_tree(self.get_rev_id(revno))
645
# use inventory as it was in that revision
646
file_id = tree.inventory.path2id(file)
647
if not file_id:
648
raise BzrError("%r is not present in revision %s" % (file, revno))
649
tree.print_file(file_id)
650
finally:
651
self.unlock()
652
653
654
def remove(self, files, verbose=False):
655
"""Mark nominated files for removal from the inventory.
656
657
This does not remove their text. This does not run on
658
659
TODO: Refuse to remove modified files unless --force is given?
660
661
TODO: Do something useful with directories.
662
663
TODO: Should this remove the text or not? Tough call; not
664
removing may be useful and the user can just use use rm, and
665
is the opposite of add. Removing it is consistent with most
666
other tools. Maybe an option.
667
"""
668
## TODO: Normalize names
669
## TODO: Remove nested loops; better scalability
670
if isinstance(files, basestring):
671
files = [files]
672
673
self.lock_write()
674
675
try:
676
tree = self.working_tree()
677
inv = tree.inventory
678
679
# do this before any modifications
680
for f in files:
681
fid = inv.path2id(f)
682
if not fid:
683
raise BzrError("cannot remove unversioned file %s" % quotefn(f))
684
mutter("remove inventory entry %s {%s}" % (quotefn(f), fid))
685
if verbose:
686
# having remove it, it must be either ignored or unknown
687
if tree.is_ignored(f):
688
new_status = 'I'
689
else:
690
new_status = '?'
691
show_status(new_status, inv[fid].kind, quotefn(f))
692
del inv[fid]
693
694
self._write_inventory(inv)
695
finally:
696
self.unlock()
697
698
# FIXME: this doesn't need to be a branch method
699
def set_inventory(self, new_inventory_list):
700
from bzrlib.inventory import Inventory, InventoryEntry
701
inv = Inventory(self.get_root_id())
702
for path, file_id, parent, kind in new_inventory_list:
703
name = os.path.basename(path)
704
if name == "":
705
continue
706
# fixme, there should be a factory function inv,add_??
707
if kind == 'directory':
708
inv.add(inventory.InventoryDirectory(file_id, name, parent))
709
elif kind == 'file':
710
inv.add(inventory.InventoryFile(file_id, name, parent))
711
elif kind == 'symlink':
712
inv.add(inventory.InventoryLink(file_id, name, parent))
713
else:
714
raise BzrError("unknown kind %r" % kind)
715
self._write_inventory(inv)
716
717
def unknowns(self):
718
"""Return all unknown files.
719
720
These are files in the working directory that are not versioned or
721
control files or ignored.
722
723
>>> b = ScratchBranch(files=['foo', 'foo~'])
724
>>> list(b.unknowns())
725
['foo']
726
>>> b.add('foo')
727
>>> list(b.unknowns())
728
[]
729
>>> b.remove('foo')
730
>>> list(b.unknowns())
731
['foo']
732
"""
733
return self.working_tree().unknowns()
734
735
736
def append_revision(self, *revision_ids):
737
for revision_id in revision_ids:
738
mutter("add {%s} to revision-history" % revision_id)
739
self.lock_write()
740
try:
741
rev_history = self.revision_history()
742
rev_history.extend(revision_ids)
743
self.put_controlfile('revision-history', '\n'.join(rev_history))
744
finally:
745
self.unlock()
746
747
def has_revision(self, revision_id):
748
"""True if this branch has a copy of the revision.
749
750
This does not necessarily imply the revision is merge
751
or on the mainline."""
752
return (revision_id is None
753
or revision_id in self.revision_store)
754
755
def get_revision_xml_file(self, revision_id):
756
"""Return XML file object for revision object."""
757
if not revision_id or not isinstance(revision_id, basestring):
758
raise InvalidRevisionId(revision_id)
759
760
self.lock_read()
761
try:
762
try:
763
return self.revision_store[revision_id]
764
except (IndexError, KeyError):
765
raise bzrlib.errors.NoSuchRevision(self, revision_id)
766
finally:
767
self.unlock()
768
769
#deprecated
770
get_revision_xml = get_revision_xml_file
771
772
def get_revision_xml(self, revision_id):
773
return self.get_revision_xml_file(revision_id).read()
774
775
776
def get_revision(self, revision_id):
777
"""Return the Revision object for a named revision"""
778
xml_file = self.get_revision_xml_file(revision_id)
779
780
try:
781
r = bzrlib.xml5.serializer_v5.read_revision(xml_file)
782
except SyntaxError, e:
783
raise bzrlib.errors.BzrError('failed to unpack revision_xml',
784
[revision_id,
785
str(e)])
786
787
assert r.revision_id == revision_id
788
return r
789
790
def get_revision_delta(self, revno):
791
"""Return the delta for one revision.
792
793
The delta is relative to its mainline predecessor, or the
794
empty tree for revision 1.
795
"""
796
assert isinstance(revno, int)
797
rh = self.revision_history()
798
if not (1 <= revno <= len(rh)):
799
raise InvalidRevisionNumber(revno)
800
801
# revno is 1-based; list is 0-based
802
803
new_tree = self.revision_tree(rh[revno-1])
804
if revno == 1:
805
old_tree = EmptyTree()
806
else:
807
old_tree = self.revision_tree(rh[revno-2])
808
809
return compare_trees(old_tree, new_tree)
810
811
def get_revision_sha1(self, revision_id):
812
"""Hash the stored value of a revision, and return it."""
813
# In the future, revision entries will be signed. At that
814
# point, it is probably best *not* to include the signature
815
# in the revision hash. Because that lets you re-sign
816
# the revision, (add signatures/remove signatures) and still
817
# have all hash pointers stay consistent.
818
# But for now, just hash the contents.
819
return bzrlib.osutils.sha_file(self.get_revision_xml_file(revision_id))
820
821
def get_ancestry(self, revision_id):
822
"""Return a list of revision-ids integrated by a revision.
823
824
This currently returns a list, but the ordering is not guaranteed:
825
treat it as a set.
826
"""
827
if revision_id is None:
828
return [None]
829
w = self.get_inventory_weave()
830
return [None] + map(w.idx_to_name,
831
w.inclusions([w.lookup(revision_id)]))
832
833
def get_inventory_weave(self):
834
return self.control_weaves.get_weave('inventory',
835
self.get_transaction())
836
837
def get_inventory(self, revision_id):
838
"""Get Inventory object by hash."""
839
xml = self.get_inventory_xml(revision_id)
840
return bzrlib.xml5.serializer_v5.read_inventory_from_string(xml)
841
842
def get_inventory_xml(self, revision_id):
843
"""Get inventory XML as a file object."""
844
try:
845
assert isinstance(revision_id, basestring), type(revision_id)
846
iw = self.get_inventory_weave()
847
return iw.get_text(iw.lookup(revision_id))
848
except IndexError:
849
raise bzrlib.errors.HistoryMissing(self, 'inventory', revision_id)
850
851
def get_inventory_sha1(self, revision_id):
852
"""Return the sha1 hash of the inventory entry
853
"""
854
return self.get_revision(revision_id).inventory_sha1
855
856
def get_revision_inventory(self, revision_id):
857
"""Return inventory of a past revision."""
858
# TODO: Unify this with get_inventory()
859
# bzr 0.0.6 and later imposes the constraint that the inventory_id
860
# must be the same as its revision, so this is trivial.
861
if revision_id == None:
862
return Inventory(self.get_root_id())
863
else:
864
return self.get_inventory(revision_id)
865
866
def revision_history(self):
867
"""Return sequence of revision hashes on to this branch."""
868
self.lock_read()
869
try:
870
transaction = self.get_transaction()
871
history = transaction.map.find_revision_history()
872
if history is not None:
873
mutter("cache hit for revision-history in %s", self)
874
return list(history)
875
history = [l.rstrip('\r\n') for l in
876
self.controlfile('revision-history', 'r').readlines()]
877
transaction.map.add_revision_history(history)
878
# this call is disabled because revision_history is
879
# not really an object yet, and the transaction is for objects.
880
# transaction.register_clean(history, precious=True)
881
return list(history)
882
finally:
883
self.unlock()
884
885
def common_ancestor(self, other, self_revno=None, other_revno=None):
886
"""
887
>>> from bzrlib.commit import commit
888
>>> sb = ScratchBranch(files=['foo', 'foo~'])
889
>>> sb.common_ancestor(sb) == (None, None)
890
True
891
>>> commit(sb, "Committing first revision", verbose=False)
892
>>> sb.common_ancestor(sb)[0]
893
1
894
>>> clone = sb.clone()
895
>>> commit(sb, "Committing second revision", verbose=False)
896
>>> sb.common_ancestor(sb)[0]
897
2
898
>>> sb.common_ancestor(clone)[0]
899
1
900
>>> commit(clone, "Committing divergent second revision",
901
... verbose=False)
902
>>> sb.common_ancestor(clone)[0]
903
1
904
>>> sb.common_ancestor(clone) == clone.common_ancestor(sb)
905
True
906
>>> sb.common_ancestor(sb) != clone.common_ancestor(clone)
907
True
908
>>> clone2 = sb.clone()
909
>>> sb.common_ancestor(clone2)[0]
910
2
911
>>> sb.common_ancestor(clone2, self_revno=1)[0]
912
1
913
>>> sb.common_ancestor(clone2, other_revno=1)[0]
914
1
915
"""
916
my_history = self.revision_history()
917
other_history = other.revision_history()
918
if self_revno is None:
919
self_revno = len(my_history)
920
if other_revno is None:
921
other_revno = len(other_history)
922
indices = range(min((self_revno, other_revno)))
923
indices.reverse()
924
for r in indices:
925
if my_history[r] == other_history[r]:
926
return r+1, my_history[r]
927
return None, None
928
929
930
def revno(self):
931
"""Return current revision number for this branch.
932
933
That is equivalent to the number of revisions committed to
934
this branch.
935
"""
936
return len(self.revision_history())
937
938
939
def last_revision(self):
940
"""Return last patch hash, or None if no history.
941
"""
942
ph = self.revision_history()
943
if ph:
944
return ph[-1]
945
else:
946
return None
947
948
949
def missing_revisions(self, other, stop_revision=None, diverged_ok=False):
950
"""Return a list of new revisions that would perfectly fit.
951
952
If self and other have not diverged, return a list of the revisions
953
present in other, but missing from self.
954
955
>>> from bzrlib.commit import commit
956
>>> bzrlib.trace.silent = True
957
>>> br1 = ScratchBranch()
958
>>> br2 = ScratchBranch()
959
>>> br1.missing_revisions(br2)
960
[]
961
>>> commit(br2, "lala!", rev_id="REVISION-ID-1")
962
>>> br1.missing_revisions(br2)
963
[u'REVISION-ID-1']
964
>>> br2.missing_revisions(br1)
965
[]
966
>>> commit(br1, "lala!", rev_id="REVISION-ID-1")
967
>>> br1.missing_revisions(br2)
968
[]
969
>>> commit(br2, "lala!", rev_id="REVISION-ID-2A")
970
>>> br1.missing_revisions(br2)
971
[u'REVISION-ID-2A']
972
>>> commit(br1, "lala!", rev_id="REVISION-ID-2B")
973
>>> br1.missing_revisions(br2)
974
Traceback (most recent call last):
975
DivergedBranches: These branches have diverged.
976
"""
977
# FIXME: If the branches have diverged, but the latest
978
# revision in this branch is completely merged into the other,
979
# then we should still be able to pull.
980
self_history = self.revision_history()
981
self_len = len(self_history)
982
other_history = other.revision_history()
983
other_len = len(other_history)
984
common_index = min(self_len, other_len) -1
985
if common_index >= 0 and \
986
self_history[common_index] != other_history[common_index]:
987
raise DivergedBranches(self, other)
988
989
if stop_revision is None:
990
stop_revision = other_len
991
else:
992
assert isinstance(stop_revision, int)
993
if stop_revision > other_len:
994
raise bzrlib.errors.NoSuchRevision(self, stop_revision)
995
return other_history[self_len:stop_revision]
996
997
def update_revisions(self, other, stop_revision=None):
998
"""Pull in new perfect-fit revisions."""
999
from bzrlib.fetch import greedy_fetch
1000
from bzrlib.revision import get_intervening_revisions
1001
if stop_revision is None:
1002
stop_revision = other.last_revision()
1003
if (stop_revision is not None and
1004
stop_revision in self.revision_history()):
1005
return
1006
greedy_fetch(to_branch=self, from_branch=other,
1007
revision=stop_revision)
1008
pullable_revs = self.missing_revisions(
1009
other, other.revision_id_to_revno(stop_revision))
1010
if pullable_revs:
1011
greedy_fetch(to_branch=self,
1012
from_branch=other,
1013
revision=pullable_revs[-1])
1014
self.append_revision(*pullable_revs)
1015
1016
1017
def commit(self, *args, **kw):
1018
from bzrlib.commit import Commit
1019
Commit().commit(self, *args, **kw)
1020
1021
def revision_id_to_revno(self, revision_id):
1022
"""Given a revision id, return its revno"""
1023
if revision_id is None:
1024
return 0
1025
history = self.revision_history()
1026
try:
1027
return history.index(revision_id) + 1
1028
except ValueError:
1029
raise bzrlib.errors.NoSuchRevision(self, revision_id)
1030
1031
def get_rev_id(self, revno, history=None):
1032
"""Find the revision id of the specified revno."""
1033
if revno == 0:
1034
return None
1035
if history is None:
1036
history = self.revision_history()
1037
elif revno <= 0 or revno > len(history):
1038
raise bzrlib.errors.NoSuchRevision(self, revno)
1039
return history[revno - 1]
1040
1041
def revision_tree(self, revision_id):
1042
"""Return Tree for a revision on this branch.
1043
1044
`revision_id` may be None for the null revision, in which case
1045
an `EmptyTree` is returned."""
1046
# TODO: refactor this to use an existing revision object
1047
# so we don't need to read it in twice.
1048
if revision_id == None:
1049
return EmptyTree()
1050
else:
1051
inv = self.get_revision_inventory(revision_id)
1052
return RevisionTree(self.weave_store, inv, revision_id)
1053
1054
1055
def working_tree(self):
1056
"""Return a `Tree` for the working copy."""
1057
from bzrlib.workingtree import WorkingTree
1058
# TODO: In the future, WorkingTree should utilize Transport
1059
# RobertCollins 20051003 - I don't think it should - working trees are
1060
# much more complex to keep consistent than our careful .bzr subset.
1061
# instead, we should say that working trees are local only, and optimise
1062
# for that.
1063
return WorkingTree(self._transport.base, self.read_working_inventory())
1064
1065
1066
def basis_tree(self):
1067
"""Return `Tree` object for last revision.
1068
1069
If there are no revisions yet, return an `EmptyTree`.
1070
"""
1071
return self.revision_tree(self.last_revision())
1072
1073
1074
def rename_one(self, from_rel, to_rel):
1075
"""Rename one file.
1076
1077
This can change the directory or the filename or both.
1078
"""
1079
self.lock_write()
1080
try:
1081
tree = self.working_tree()
1082
inv = tree.inventory
1083
if not tree.has_filename(from_rel):
1084
raise BzrError("can't rename: old working file %r does not exist" % from_rel)
1085
if tree.has_filename(to_rel):
1086
raise BzrError("can't rename: new working file %r already exists" % to_rel)
1087
1088
file_id = inv.path2id(from_rel)
1089
if file_id == None:
1090
raise BzrError("can't rename: old name %r is not versioned" % from_rel)
1091
1092
if inv.path2id(to_rel):
1093
raise BzrError("can't rename: new name %r is already versioned" % to_rel)
1094
1095
to_dir, to_tail = os.path.split(to_rel)
1096
to_dir_id = inv.path2id(to_dir)
1097
if to_dir_id == None and to_dir != '':
1098
raise BzrError("can't determine destination directory id for %r" % to_dir)
1099
1100
mutter("rename_one:")
1101
mutter(" file_id {%s}" % file_id)
1102
mutter(" from_rel %r" % from_rel)
1103
mutter(" to_rel %r" % to_rel)
1104
mutter(" to_dir %r" % to_dir)
1105
mutter(" to_dir_id {%s}" % to_dir_id)
1106
1107
inv.rename(file_id, to_dir_id, to_tail)
1108
1109
from_abs = self.abspath(from_rel)
1110
to_abs = self.abspath(to_rel)
1111
try:
1112
rename(from_abs, to_abs)
1113
except OSError, e:
1114
raise BzrError("failed to rename %r to %r: %s"
1115
% (from_abs, to_abs, e[1]),
1116
["rename rolled back"])
1117
1118
self._write_inventory(inv)
1119
finally:
1120
self.unlock()
1121
1122
1123
def move(self, from_paths, to_name):
1124
"""Rename files.
1125
1126
to_name must exist as a versioned directory.
1127
1128
If to_name exists and is a directory, the files are moved into
1129
it, keeping their old names. If it is a directory,
1130
1131
Note that to_name is only the last component of the new name;
1132
this doesn't change the directory.
1133
1134
This returns a list of (from_path, to_path) pairs for each
1135
entry that is moved.
1136
"""
1137
result = []
1138
self.lock_write()
1139
try:
1140
## TODO: Option to move IDs only
1141
assert not isinstance(from_paths, basestring)
1142
tree = self.working_tree()
1143
inv = tree.inventory
1144
to_abs = self.abspath(to_name)
1145
if not isdir(to_abs):
1146
raise BzrError("destination %r is not a directory" % to_abs)
1147
if not tree.has_filename(to_name):
1148
raise BzrError("destination %r not in working directory" % to_abs)
1149
to_dir_id = inv.path2id(to_name)
1150
if to_dir_id == None and to_name != '':
1151
raise BzrError("destination %r is not a versioned directory" % to_name)
1152
to_dir_ie = inv[to_dir_id]
1153
if to_dir_ie.kind not in ('directory', 'root_directory'):
1154
raise BzrError("destination %r is not a directory" % to_abs)
1155
1156
to_idpath = inv.get_idpath(to_dir_id)
1157
1158
for f in from_paths:
1159
if not tree.has_filename(f):
1160
raise BzrError("%r does not exist in working tree" % f)
1161
f_id = inv.path2id(f)
1162
if f_id == None:
1163
raise BzrError("%r is not versioned" % f)
1164
name_tail = splitpath(f)[-1]
1165
dest_path = appendpath(to_name, name_tail)
1166
if tree.has_filename(dest_path):
1167
raise BzrError("destination %r already exists" % dest_path)
1168
if f_id in to_idpath:
1169
raise BzrError("can't move %r to a subdirectory of itself" % f)
1170
1171
# OK, so there's a race here, it's possible that someone will
1172
# create a file in this interval and then the rename might be
1173
# left half-done. But we should have caught most problems.
1174
1175
for f in from_paths:
1176
name_tail = splitpath(f)[-1]
1177
dest_path = appendpath(to_name, name_tail)
1178
result.append((f, dest_path))
1179
inv.rename(inv.path2id(f), to_dir_id, name_tail)
1180
try:
1181
rename(self.abspath(f), self.abspath(dest_path))
1182
except OSError, e:
1183
raise BzrError("failed to rename %r to %r: %s" % (f, dest_path, e[1]),
1184
["rename rolled back"])
1185
1186
self._write_inventory(inv)
1187
finally:
1188
self.unlock()
1189
1190
return result
1191
1192
1193
def revert(self, filenames, old_tree=None, backups=True):
1194
"""Restore selected files to the versions from a previous tree.
1195
1196
backups
1197
If true (default) backups are made of files before
1198
they're renamed.
1199
"""
1200
from bzrlib.errors import NotVersionedError, BzrError
1201
from bzrlib.atomicfile import AtomicFile
1202
from bzrlib.osutils import backup_file
1203
1204
inv = self.read_working_inventory()
1205
if old_tree is None:
1206
old_tree = self.basis_tree()
1207
old_inv = old_tree.inventory
1208
1209
nids = []
1210
for fn in filenames:
1211
file_id = inv.path2id(fn)
1212
if not file_id:
1213
raise NotVersionedError("not a versioned file", fn)
1214
if not old_inv.has_id(file_id):
1215
raise BzrError("file not present in old tree", fn, file_id)
1216
nids.append((fn, file_id))
1217
1218
# TODO: Rename back if it was previously at a different location
1219
1220
# TODO: If given a directory, restore the entire contents from
1221
# the previous version.
1222
1223
# TODO: Make a backup to a temporary file.
1224
1225
# TODO: If the file previously didn't exist, delete it?
1226
for fn, file_id in nids:
1227
backup_file(fn)
1228
1229
f = AtomicFile(fn, 'wb')
1230
try:
1231
f.write(old_tree.get_file(file_id).read())
1232
f.commit()
1233
finally:
1234
f.close()
1235
1236
1237
def pending_merges(self):
1238
"""Return a list of pending merges.
1239
1240
These are revisions that have been merged into the working
1241
directory but not yet committed.
1242
"""
1243
cfn = self._rel_controlfilename('pending-merges')
1244
if not self._transport.has(cfn):
1245
return []
1246
p = []
1247
for l in self.controlfile('pending-merges', 'r').readlines():
1248
p.append(l.rstrip('\n'))
1249
return p
1250
1251
1252
def add_pending_merge(self, *revision_ids):
1253
# TODO: Perhaps should check at this point that the
1254
# history of the revision is actually present?
1255
p = self.pending_merges()
1256
updated = False
1257
for rev_id in revision_ids:
1258
if rev_id in p:
1259
continue
1260
p.append(rev_id)
1261
updated = True
1262
if updated:
1263
self.set_pending_merges(p)
1264
1265
def set_pending_merges(self, rev_list):
1266
self.lock_write()
1267
try:
1268
self.put_controlfile('pending-merges', '\n'.join(rev_list))
1269
finally:
1270
self.unlock()
1271
1272
1273
def get_parent(self):
1274
"""Return the parent location of the branch.
1275
1276
This is the default location for push/pull/missing. The usual
1277
pattern is that the user can override it by specifying a
1278
location.
1279
"""
1280
import errno
1281
_locs = ['parent', 'pull', 'x-pull']
1282
for l in _locs:
1283
try:
1284
return self.controlfile(l, 'r').read().strip('\n')
1285
except IOError, e:
1286
if e.errno != errno.ENOENT:
1287
raise
1288
return None
1289
1290
1291
def set_parent(self, url):
1292
# TODO: Maybe delete old location files?
1293
from bzrlib.atomicfile import AtomicFile
1294
self.lock_write()
1295
try:
1296
f = AtomicFile(self.controlfilename('parent'))
1297
try:
1298
f.write(url + '\n')
1299
f.commit()
1300
finally:
1301
f.close()
1302
finally:
1303
self.unlock()
1304
1305
def check_revno(self, revno):
1306
"""\
1307
Check whether a revno corresponds to any revision.
1308
Zero (the NULL revision) is considered valid.
1309
"""
1310
if revno != 0:
1311
self.check_real_revno(revno)
1312
1313
def check_real_revno(self, revno):
1314
"""\
1315
Check whether a revno corresponds to a real revision.
1316
Zero (the NULL revision) is considered invalid
1317
"""
1318
if revno < 1 or revno > self.revno():
1319
raise InvalidRevisionNumber(revno)
1320
1321
1322
1323
1324
1325
class ScratchBranch(_Branch):
1326
"""Special test class: a branch that cleans up after itself.
1327
1328
>>> b = ScratchBranch()
1329
>>> isdir(b.base)
1330
True
1331
>>> bd = b.base
1332
>>> b.destroy()
1333
>>> isdir(bd)
1334
False
1335
"""
1336
def __init__(self, files=[], dirs=[], base=None):
1337
"""Make a test branch.
1338
1339
This creates a temporary directory and runs init-tree in it.
1340
1341
If any files are listed, they are created in the working copy.
1342
"""
1343
from tempfile import mkdtemp
1344
init = False
1345
if base is None:
1346
base = mkdtemp()
1347
init = True
1348
if isinstance(base, basestring):
1349
base = get_transport(base)
1350
_Branch.__init__(self, base, init=init)
1351
for d in dirs:
1352
self._transport.mkdir(d)
1353
1354
for f in files:
1355
self._transport.put(f, 'content of %s' % f)
1356
1357
1358
def clone(self):
1359
"""
1360
>>> orig = ScratchBranch(files=["file1", "file2"])
1361
>>> clone = orig.clone()
1362
>>> if os.name != 'nt':
1363
... os.path.samefile(orig.base, clone.base)
1364
... else:
1365
... orig.base == clone.base
1366
...
1367
False
1368
>>> os.path.isfile(os.path.join(clone.base, "file1"))
1369
True
1370
"""
1371
from shutil import copytree
1372
from tempfile import mkdtemp
1373
base = mkdtemp()
1374
os.rmdir(base)
1375
copytree(self.base, base, symlinks=True)
1376
return ScratchBranch(base=base)
1377
1378
def __del__(self):
1379
self.destroy()
1380
1381
def destroy(self):
1382
"""Destroy the test branch, removing the scratch directory."""
1383
from shutil import rmtree
1384
try:
1385
if self.base:
1386
mutter("delete ScratchBranch %s" % self.base)
1387
rmtree(self.base)
1388
except OSError, e:
1389
# Work around for shutil.rmtree failing on Windows when
1390
# readonly files are encountered
1391
mutter("hit exception in destroying ScratchBranch: %s" % e)
1392
for root, dirs, files in os.walk(self.base, topdown=False):
1393
for name in files:
1394
os.chmod(os.path.join(root, name), 0700)
1395
rmtree(self.base)
1396
self._transport = None
1397
1398
1399
1400
######################################################################
1401
# predicates
1402
1403
1404
def is_control_file(filename):
1405
## FIXME: better check
1406
filename = os.path.normpath(filename)
1407
while filename != '':
1408
head, tail = os.path.split(filename)
1409
## mutter('check %r for control file' % ((head, tail), ))
1410
if tail == bzrlib.BZRDIR:
1411
return True
1412
if filename == head:
1413
break
1414
filename = head
1415
return False
1416
1417
1418
1419
def gen_file_id(name):
1420
"""Return new file id.
1421
1422
This should probably generate proper UUIDs, but for the moment we
1423
cope with just randomness because running uuidgen every time is
1424
slow."""
1425
import re
1426
from binascii import hexlify
1427
from time import time
1428
1429
# get last component
1430
idx = name.rfind('/')
1431
if idx != -1:
1432
name = name[idx+1 : ]
1433
idx = name.rfind('\\')
1434
if idx != -1:
1435
name = name[idx+1 : ]
1436
1437
# make it not a hidden file
1438
name = name.lstrip('.')
1439
1440
# remove any wierd characters; we don't escape them but rather
1441
# just pull them out
1442
name = re.sub(r'[^\w.]', '', name)
1443
1444
s = hexlify(rand_bytes(8))
1445
return '-'.join((name, compact_date(time()), s))
1446
1447
1448
def gen_root_id():
1449
"""Return a new tree-root file id."""
1450
return gen_file_id('TREE_ROOT')
1451
1452
Loggerhead is a web-based interface for Breezy
Version: 2.0.1