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- Committer: Robert Collins
- Date: 2005-10-03 05:54:35 UTC
- mto: (1393.1.30)
- mto: This revision was merged to the branch mainline in revision 1400.
- Revision ID: robertc@robertcollins.net-20051003055434-c8ebd30d1de10247
move exporting functionality into inventory.py - uncovers bug in symlink support
- files added:
- Makefile
- bzrlib/store
- bzrlib/transport
- bzrlib/util
- files removed:
- bzrlib/meta_store.py
- plugins/changeset
- files renamed:
- plugins/ => bzrlib/plugins/
- tools/testweave.py => bzrlib/selftest/test_weave.py
- bzrlib/store.py => bzrlib/store/__init__.py
- effbot/ => bzrlib/util/effbot/
- elementtree/ => bzrlib/util/elementtree/
- urlgrabber/ => bzrlib/util/urlgrabber/
- bzrlib/newinventory.py => contrib/newinventory.py
- files modified:
- .bzrignore
added
removed
bzrlib/commit.py
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# Copyright (C) 2005 Canonical Ltd
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#
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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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#
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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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#
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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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# FIXME: "bzr commit doc/format" commits doc/format.txt!
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def commit(branch, message,
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timestamp=None,
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timezone=None,
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committer=None,
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verbose=True,
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specific_files=None,
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rev_id=None,
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allow_pointless=True):
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"""Commit working copy as a new revision.
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The basic approach is to add all the file texts into the
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store, then the inventory, then make a new revision pointing
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to that inventory and store that.
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This is not quite safe if the working copy changes during the
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commit; for the moment that is simply not allowed. A better
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approach is to make a temporary copy of the files before
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computing their hashes, and then add those hashes in turn to
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the inventory. This should mean at least that there are no
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broken hash pointers. There is no way we can get a snapshot
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of the whole directory at an instant. This would also have to
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be robust against files disappearing, moving, etc. So the
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whole thing is a bit hard.
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This raises PointlessCommit if there are no changes, no new merges,
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and allow_pointless is false.
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timestamp -- if not None, seconds-since-epoch for a
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postdated/predated commit.
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specific_files
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If true, commit only those files.
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rev_id
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If set, use this as the new revision id.
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Useful for test or import commands that need to tightly
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control what revisions are assigned. If you duplicate
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a revision id that exists elsewhere it is your own fault.
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If null (default), a time/random revision id is generated.
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"""
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import time, tempfile
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from bzrlib.osutils import local_time_offset, username
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from bzrlib.branch import gen_file_id
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from bzrlib.errors import BzrError, PointlessCommit
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from bzrlib.revision import Revision, RevisionReference
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from bzrlib.trace import mutter, note
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from bzrlib.xml import pack_xml
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branch.lock_write()
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try:
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# First walk over the working inventory; and both update that
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# and also build a new revision inventory. The revision
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# inventory needs to hold the text-id, sha1 and size of the
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# actual file versions committed in the revision. (These are
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# not present in the working inventory.) We also need to
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# detect missing/deleted files, and remove them from the
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# working inventory.
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work_tree = branch.working_tree()
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work_inv = work_tree.inventory
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basis = branch.basis_tree()
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basis_inv = basis.inventory
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if verbose:
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note('looking for changes...')
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pending_merges = branch.pending_merges()
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missing_ids, new_inv, any_changes = \
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_gather_commit(branch,
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work_tree,
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work_inv,
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basis_inv,
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specific_files,
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verbose)
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if not (any_changes or allow_pointless or pending_merges):
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raise PointlessCommit()
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for file_id in missing_ids:
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# Any files that have been deleted are now removed from the
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# working inventory. Files that were not selected for commit
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# are left as they were in the working inventory and ommitted
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# from the revision inventory.
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# have to do this later so we don't mess up the iterator.
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# since parents may be removed before their children we
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# have to test.
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# FIXME: There's probably a better way to do this; perhaps
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# the workingtree should know how to filter itbranch.
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if work_inv.has_id(file_id):
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del work_inv[file_id]
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# XXX: Can we do any better about making interrupted commits change
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# nothing? Perhaps the best approach is to integrate commit of
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# AtomicFiles with releasing the lock on the Branch.
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# TODO: Separate 'prepare' phase where we find a list of potentially
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# committed files. We then can then pause the commit to prompt for a
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# commit message, knowing the summary will be the same as what's
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# actually used for the commit. (But perhaps simpler to simply get
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# the tree status, then use that for a selective commit?)
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# The newly committed revision is going to have a shape corresponding
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# to that of the working inventory. Files that are not in the
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# working tree and that were in the predecessor are reported as
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# removed --- this can include files that were either removed from the
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# inventory or deleted in the working tree. If they were only
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# deleted from disk, they are removed from the working inventory.
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# We then consider the remaining entries, which will be in the new
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# version. Directory entries are simply copied across. File entries
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# must be checked to see if a new version of the file should be
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# recorded. For each parent revision inventory, we check to see what
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# version of the file was present. If the file was present in at
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# least one tree, and if it was the same version in all the trees,
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# then we can just refer to that version. Otherwise, a new version
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# representing the merger of the file versions must be added.
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# TODO: Update hashcache before and after - or does the WorkingTree
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# look after that?
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# This code requires all merge parents to be present in the branch.
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# We could relax this but for the sake of simplicity the constraint is
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# here for now. It's not totally clear to me how we'd know which file
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# need new text versions if some parents are absent. -- mbp 20050915
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# TODO: Rather than mashing together the ancestry and storing it back,
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# perhaps the weave should have single method which does it all in one
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# go, avoiding a lot of redundant work.
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# TODO: Perhaps give a warning if one of the revisions marked as
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# merged is already in the ancestry, and then don't record it as a
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# distinct parent.
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# TODO: If the file is newly merged but unchanged from the version it
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# merges from, then it should still be reported as newly added
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# relative to the basis revision.
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import os
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import re
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import sys
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import time
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import pdb
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from binascii import hexlify
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from cStringIO import StringIO
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from bzrlib.osutils import (local_time_offset, username,
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rand_bytes, compact_date, user_email,
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kind_marker, is_inside_any, quotefn,
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sha_string, sha_strings, sha_file, isdir, isfile,
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split_lines)
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from bzrlib.branch import gen_file_id
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from bzrlib.errors import (BzrError, PointlessCommit,
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HistoryMissing,
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)
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from bzrlib.revision import Revision
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from bzrlib.trace import mutter, note, warning
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from bzrlib.xml5 import serializer_v5
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from bzrlib.inventory import Inventory
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from bzrlib.weave import Weave
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from bzrlib.weavefile import read_weave, write_weave_v5
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from bzrlib.atomicfile import AtomicFile
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def commit(*args, **kwargs):
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"""Commit a new revision to a branch.
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Function-style interface for convenience of old callers.
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New code should use the Commit class instead.
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"""
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## XXX: Remove this in favor of Branch.commit?
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Commit().commit(*args, **kwargs)
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class NullCommitReporter(object):
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"""I report on progress of a commit."""
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def added(self, path):
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pass
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def removed(self, path):
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pass
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def renamed(self, old_path, new_path):
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pass
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class ReportCommitToLog(NullCommitReporter):
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def added(self, path):
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note('added %s', path)
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def removed(self, path):
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note('removed %s', path)
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def renamed(self, old_path, new_path):
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note('renamed %s => %s', old_path, new_path)
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class Commit(object):
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"""Task of committing a new revision.
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This is a MethodObject: it accumulates state as the commit is
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prepared, and then it is discarded. It doesn't represent
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historical revisions, just the act of recording a new one.
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missing_ids
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Modified to hold a list of files that have been deleted from
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the working directory; these should be removed from the
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working inventory.
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"""
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def __init__(self,
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reporter=None):
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if reporter is not None:
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self.reporter = reporter
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else:
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self.reporter = NullCommitReporter()
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def commit(self,
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branch, message,
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timestamp=None,
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timezone=None,
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committer=None,
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specific_files=None,
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rev_id=None,
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allow_pointless=True,
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verbose=False):
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"""Commit working copy as a new revision.
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timestamp -- if not None, seconds-since-epoch for a
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postdated/predated commit.
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specific_files -- If true, commit only those files.
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rev_id -- If set, use this as the new revision id.
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Useful for test or import commands that need to tightly
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control what revisions are assigned. If you duplicate
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a revision id that exists elsewhere it is your own fault.
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If null (default), a time/random revision id is generated.
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allow_pointless -- If true (default), commit even if nothing
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has changed and no merges are recorded.
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"""
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mutter('preparing to commit')
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self.branch = branch
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self.weave_store = branch.weave_store
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self.rev_id = rev_id
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self.specific_files = specific_files
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self.allow_pointless = allow_pointless
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if timestamp is None:
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self.timestamp = time.time()
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else:
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self.timestamp = long(timestamp)
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if rev_id is None:
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rev_id = _gen_revision_id(time.time())
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inv_id = rev_id
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inv_tmp = tempfile.TemporaryFile()
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pack_xml(new_inv, inv_tmp)
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inv_tmp.seek(0)
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branch.inventory_store.add(inv_tmp, inv_id)
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mutter('new inventory_id is {%s}' % inv_id)
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# We could also just sha hash the inv_tmp file
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# however, in the case that branch.inventory_store.add()
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# ever actually does anything special
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inv_sha1 = branch.get_inventory_sha1(inv_id)
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branch._write_inventory(work_inv)
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if timestamp == None:
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timestamp = time.time()
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if committer == None:
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committer = username()
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if timezone == None:
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timezone = local_time_offset()
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mutter("building commit log message")
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rev = Revision(timestamp=timestamp,
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timezone=timezone,
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committer=committer,
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message = message,
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inventory_id=inv_id,
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inventory_sha1=inv_sha1,
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revision_id=rev_id)
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rev.parents = []
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precursor_id = branch.last_patch()
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self.rev_id = _gen_revision_id(self.branch, self.timestamp)
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else:
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self.rev_id = rev_id
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if committer is None:
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self.committer = username(self.branch)
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else:
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assert isinstance(committer, basestring), type(committer)
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self.committer = committer
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if timezone is None:
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self.timezone = local_time_offset()
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else:
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self.timezone = int(timezone)
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assert isinstance(message, basestring), type(message)
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self.message = message
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self._escape_commit_message()
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self.branch.lock_write()
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try:
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self.work_tree = self.branch.working_tree()
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self.work_inv = self.work_tree.inventory
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self.basis_tree = self.branch.basis_tree()
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self.basis_inv = self.basis_tree.inventory
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self._gather_parents()
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if len(self.parents) > 1 and self.specific_files:
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raise NotImplementedError('selected-file commit of merges is not supported yet')
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self._check_parents_present()
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self._remove_deleted()
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self._populate_new_inv()
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self._store_snapshot()
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self._report_deletes()
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if not (self.allow_pointless
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or len(self.parents) > 1
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or self.new_inv != self.basis_inv):
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raise PointlessCommit()
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self._record_inventory()
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self._record_ancestry()
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self._make_revision()
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note('committed r%d {%s}', (self.branch.revno() + 1),
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self.rev_id)
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self.branch.append_revision(self.rev_id)
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self.branch.set_pending_merges([])
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finally:
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self.branch.unlock()
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def _record_inventory(self):
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"""Store the inventory for the new revision."""
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inv_text = serializer_v5.write_inventory_to_string(self.new_inv)
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self.inv_sha1 = sha_string(inv_text)
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s = self.branch.control_weaves
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s.add_text('inventory', self.rev_id,
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split_lines(inv_text), self.present_parents)
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def _escape_commit_message(self):
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"""Replace xml-incompatible control characters."""
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# Python strings can include characters that can't be
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# represented in well-formed XML; escape characters that
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# aren't listed in the XML specification
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# (http://www.w3.org/TR/REC-xml/#NT-Char).
250
if isinstance(self.message, unicode):
251
char_pattern = u'[^\x09\x0A\x0D\u0020-\uD7FF\uE000-\uFFFD]'
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else:
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# Use a regular 'str' as pattern to avoid having re.subn
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# return 'unicode' results.
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char_pattern = '[^x09\x0A\x0D\x20-\xFF]'
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self.message, escape_count = re.subn(
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char_pattern,
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lambda match: match.group(0).encode('unicode_escape'),
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self.message)
260
if escape_count:
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note("replaced %d control characters in message", escape_count)
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def _record_ancestry(self):
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"""Append merged revision ancestry to the ancestry file.
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This should be the merged ancestry of all parents, plus the
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new revision id."""
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s = self.branch.control_weaves
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w = s.get_weave_or_empty('ancestry')
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lines = self._make_ancestry(w)
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w.add(self.rev_id, self.present_parents, lines)
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s.put_weave('ancestry', w)
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def _make_ancestry(self, ancestry_weave):
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"""Return merged ancestry lines.
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The lines are revision-ids followed by newlines."""
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parent_ancestries = [ancestry_weave.get(p) for p in self.present_parents]
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new_lines = merge_ancestry_lines(self.rev_id, parent_ancestries)
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mutter('merged ancestry of {%s}:\n%s', self.rev_id, ''.join(new_lines))
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return new_lines
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def _gather_parents(self):
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"""Record the parents of a merge for merge detection."""
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pending_merges = self.branch.pending_merges()
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self.parents = []
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self.parent_trees = []
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self.present_parents = []
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precursor_id = self.branch.last_revision()
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if precursor_id:
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precursor_sha1 = branch.get_revision_sha1(precursor_id)
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rev.parents.append(RevisionReference(precursor_id, precursor_sha1))
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for merge_rev in pending_merges:
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rev.parents.append(RevisionReference(merge_rev))
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self.parents.append(precursor_id)
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self.parents += pending_merges
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for revision in self.parents:
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if self.branch.has_revision(revision):
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self.parent_trees.append(self.branch.revision_tree(revision))
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self.present_parents.append(revision)
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rev_tmp = tempfile.TemporaryFile()
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pack_xml(rev, rev_tmp)
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def _check_parents_present(self):
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for parent_id in self.parents:
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mutter('commit parent revision {%s}', parent_id)
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if not self.branch.has_revision(parent_id):
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if parent_id == self.branch.last_revision():
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warning("parent is pissing %r", parent_id)
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raise HistoryMissing(self.branch, 'revision', parent_id)
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else:
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mutter("commit will ghost revision %r", parent_id)
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def _make_revision(self):
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"""Record a new revision object for this commit."""
310
self.rev = Revision(timestamp=self.timestamp,
311
timezone=self.timezone,
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committer=self.committer,
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message=self.message,
314
inventory_sha1=self.inv_sha1,
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revision_id=self.rev_id)
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self.rev.parent_ids = self.parents
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rev_tmp = StringIO()
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serializer_v5.write_revision(self.rev, rev_tmp)
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rev_tmp.seek(0)
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branch.revision_store.add(rev_tmp, rev_id)
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mutter("new revision_id is {%s}" % rev_id)
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## XXX: Everything up to here can simply be orphaned if we abort
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## the commit; it will leave junk files behind but that doesn't
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## matter.
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## TODO: Read back the just-generated changeset, and make sure it
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## applies and recreates the right state.
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## TODO: Also calculate and store the inventory SHA1
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mutter("committing patch r%d" % (branch.revno() + 1))
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branch.append_revision(rev_id)
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branch.set_pending_merges([])
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if verbose:
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note("commited r%d" % branch.revno())
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finally:
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branch.unlock()
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def _gen_revision_id(when):
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self.branch.revision_store.add(rev_tmp, self.rev_id)
321
mutter('new revision_id is {%s}', self.rev_id)
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def _remove_deleted(self):
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"""Remove deleted files from the working inventories.
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This is done prior to taking the working inventory as the
328
basis for the new committed inventory.
329
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This returns true if any files
331
*that existed in the basis inventory* were deleted.
332
Files that were added and deleted
333
in the working copy don't matter.
334
"""
335
specific = self.specific_files
336
deleted_ids = []
337
for path, ie in self.work_inv.iter_entries():
338
if specific and not is_inside_any(specific, path):
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continue
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if not self.work_tree.has_filename(path):
341
note('missing %s', path)
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deleted_ids.append(ie.file_id)
343
if deleted_ids:
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for file_id in deleted_ids:
345
if file_id in self.work_inv:
346
del self.work_inv[file_id]
347
self.branch._write_inventory(self.work_inv)
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def _find_entry_parents(self, file_id):
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"""Return the text versions and hashes for all file parents.
352
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Returned as a map from text version to inventory entry.
354
355
This is a set containing the file versions in all parents
356
revisions containing the file. If the file is new, the set
357
will be empty."""
358
r = {}
359
for tree in self.parent_trees:
360
if file_id in tree.inventory:
361
ie = tree.inventory[file_id]
362
assert ie.file_id == file_id
363
if ie.revision in r:
364
assert r[ie.revision] == ie
365
else:
366
r[ie.revision] = ie
367
return r
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def _store_snapshot(self):
370
"""Pass over inventory and record a snapshot.
371
372
Entries get a new revision when they are modified in
373
any way, which includes a merge with a new set of
374
parents that have the same entry. Currently we do not
375
check for that set being ancestors of each other - and
376
we should - only parallel children should count for this
377
test see find_entry_parents to correct this. FIXME <---
378
I.e. if we are merging in revision FOO, and our
379
copy of file id BAR is identical to FOO.BAR, we should
380
generate a new revision of BAR IF and only IF FOO is
381
neither a child of our current tip, nor an ancestor of
382
our tip. The presence of FOO in our store should not
383
affect this logic UNLESS we are doing a merge of FOO,
384
or a child of FOO.
385
"""
386
# XXX: Need to think more here about when the user has
387
# made a specific decision on a particular value -- c.f.
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# mark-merge.
389
for path, ie in self.new_inv.iter_entries():
390
previous_entries = self._find_entry_parents(ie. file_id)
391
if ie.revision is None:
392
change = ie.snapshot(self.rev_id, path, previous_entries,
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self.work_tree, self.weave_store)
394
else:
395
change = "unchanged"
396
note("%s %s", change, path)
397
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def _populate_new_inv(self):
399
"""Build revision inventory.
400
401
This creates a new empty inventory. Depending on
402
which files are selected for commit, and what is present in the
403
current tree, the new inventory is populated. inventory entries
404
which are candidates for modification have their revision set to
405
None; inventory entries that are carried over untouched have their
406
revision set to their prior value.
407
"""
408
mutter("Selecting files for commit with filter %s", self.specific_files)
409
self.new_inv = Inventory()
410
for path, new_ie in self.work_inv.iter_entries():
411
file_id = new_ie.file_id
412
mutter('check %s {%s}', path, new_ie.file_id)
413
if self.specific_files:
414
if not is_inside_any(self.specific_files, path):
415
mutter('%s not selected for commit', path)
416
self._carry_file(file_id)
417
continue
418
mutter('%s selected for commit', path)
419
ie = new_ie.copy()
420
ie.revision = None
421
self.new_inv.add(ie)
422
423
def _carry_file(self, file_id):
424
"""Carry the file unchanged from the basis revision."""
425
if self.basis_inv.has_id(file_id):
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self.new_inv.add(self.basis_inv[file_id].copy())
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def _report_deletes(self):
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for file_id in self.basis_inv:
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if file_id not in self.new_inv:
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note('deleted %s', self.basis_inv.id2path(file_id))
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def _gen_revision_id(branch, when):
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436
"""Return new revision-id."""
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from binascii import hexlify
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from osutils import rand_bytes, compact_date, user_email
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s = '%s-%s-' % (user_email(), compact_date(when))
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s = '%s-%s-' % (user_email(branch), compact_date(when))
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s += hexlify(rand_bytes(8))
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return s
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def _gather_commit(branch, work_tree, work_inv, basis_inv, specific_files,
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verbose):
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"""Build inventory preparatory to commit.
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Returns missing_ids, new_inv, any_changes.
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This adds any changed files into the text store, and sets their
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test-id, sha and size in the returned inventory appropriately.
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missing_ids
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Modified to hold a list of files that have been deleted from
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the working directory; these should be removed from the
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working inventory.
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def merge_ancestry_lines(rev_id, ancestries):
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"""Return merged ancestry lines.
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rev_id -- id of the new revision
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ancestries -- a sequence of ancestries for parent revisions,
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as newline-terminated line lists.
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"""
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from bzrlib.inventory import Inventory
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from bzrlib.osutils import isdir, isfile, sha_string, quotefn, \
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local_time_offset, username, kind_marker, is_inside_any
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from bzrlib.branch import gen_file_id
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from bzrlib.errors import BzrError
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from bzrlib.revision import Revision
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from bzrlib.trace import mutter, note
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any_changes = False
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inv = Inventory(work_inv.root.file_id)
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missing_ids = []
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for path, entry in work_inv.iter_entries():
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## TODO: Check that the file kind has not changed from the previous
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## revision of this file (if any).
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p = branch.abspath(path)
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file_id = entry.file_id
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mutter('commit prep file %s, id %r ' % (p, file_id))
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if specific_files and not is_inside_any(specific_files, path):
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mutter(' skipping file excluded from commit')
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if basis_inv.has_id(file_id):
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# carry over with previous state
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inv.add(basis_inv[file_id].copy())
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else:
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# omit this from committed inventory
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pass
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continue
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if not work_tree.has_id(file_id):
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if verbose:
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print('deleted %s%s' % (path, kind_marker(entry.kind)))
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any_changes = True
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mutter(" file is missing, removing from inventory")
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missing_ids.append(file_id)
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continue
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# this is present in the new inventory; may be new, modified or
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# unchanged.
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old_ie = basis_inv.has_id(file_id) and basis_inv[file_id]
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entry = entry.copy()
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inv.add(entry)
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if old_ie:
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old_kind = old_ie.kind
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if old_kind != entry.kind:
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raise BzrError("entry %r changed kind from %r to %r"
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% (file_id, old_kind, entry.kind))
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if entry.kind == 'directory':
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if not isdir(p):
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raise BzrError("%s is entered as directory but not a directory"
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% quotefn(p))
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elif entry.kind == 'file':
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if not isfile(p):
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raise BzrError("%s is entered as file but is not a file" % quotefn(p))
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new_sha1 = work_tree.get_file_sha1(file_id)
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if (old_ie
276
and old_ie.text_sha1 == new_sha1):
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## assert content == basis.get_file(file_id).read()
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entry.text_id = old_ie.text_id
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entry.text_sha1 = new_sha1
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entry.text_size = old_ie.text_size
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mutter(' unchanged from previous text_id {%s}' %
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entry.text_id)
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else:
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content = file(p, 'rb').read()
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# calculate the sha again, just in case the file contents
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# changed since we updated the cache
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entry.text_sha1 = sha_string(content)
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entry.text_size = len(content)
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entry.text_id = gen_file_id(entry.name)
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branch.text_store.add(content, entry.text_id)
293
mutter(' stored with text_id {%s}' % entry.text_id)
294
295
if verbose:
296
marked = path + kind_marker(entry.kind)
297
if not old_ie:
298
print 'added', marked
299
any_changes = True
300
elif old_ie == entry:
301
pass # unchanged
302
elif (old_ie.name == entry.name
303
and old_ie.parent_id == entry.parent_id):
304
print 'modified', marked
305
any_changes = True
306
else:
307
print 'renamed', marked
308
any_changes = True
309
310
return missing_ids, inv, any_changes
311
312
452
if len(ancestries) == 0:
453
return [rev_id + '\n']
454
seen = set(ancestries[0])
455
ancs = ancestries[0][:]
456
for parent_ancestry in ancestries[1:]:
457
for line in parent_ancestry:
458
assert line[-1] == '\n'
459
if line not in seen:
460
ancs.append(line)
461
seen.add(line)
462
r = rev_id + '\n'
463
assert r not in seen
464
ancs.append(r)
465
return ancs
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