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# Copyright (C) 2005 Canonical Ltd
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
def commit(branch, message, timestamp=None, timezone=None,
committer=None,
verbose=False):
"""Commit working copy as a new revision.
The basic approach is to add all the file texts into the
store, then the inventory, then make a new revision pointing
to that inventory and store that.
This is not quite safe if the working copy changes during the
commit; for the moment that is simply not allowed. A better
approach is to make a temporary copy of the files before
computing their hashes, and then add those hashes in turn to
the inventory. This should mean at least that there are no
broken hash pointers. There is no way we can get a snapshot
of the whole directory at an instant. This would also have to
be robust against files disappearing, moving, etc. So the
whole thing is a bit hard.
timestamp -- if not None, seconds-since-epoch for a
postdated/predated commit.
"""
import os, time, tempfile
from inventory import Inventory
from osutils import isdir, isfile, sha_string, quotefn, \
local_time_offset, username
from branch import gen_file_id
from errors import BzrError
from revision import Revision
from textui import show_status
from trace import mutter, note
branch._need_writelock()
## TODO: Show branch names
# TODO: Don't commit if there are no changes, unless forced?
# First walk over the working inventory; and both update that
# and also build a new revision inventory. The revision
# inventory needs to hold the text-id, sha1 and size of the
# actual file versions committed in the revision. (These are
# not present in the working inventory.) We also need to
# detect missing/deleted files, and remove them from the
# working inventory.
work_inv = branch.read_working_inventory()
inv = Inventory()
basis = branch.basis_tree()
basis_inv = basis.inventory
missing_ids = []
for path, entry in work_inv.iter_entries():
## TODO: Cope with files that have gone missing.
## TODO: Check that the file kind has not changed from the previous
## revision of this file (if any).
entry = entry.copy()
p = branch.abspath(path)
file_id = entry.file_id
mutter('commit prep file %s, id %r ' % (p, file_id))
if not os.path.exists(p):
mutter(" file is missing, removing from inventory")
if verbose:
show_status('D', entry.kind, quotefn(path))
missing_ids.append(file_id)
continue
# TODO: Handle files that have been deleted
# TODO: Maybe a special case for empty files? Seems a
# waste to store them many times.
inv.add(entry)
if basis_inv.has_id(file_id):
old_kind = basis_inv[file_id].kind
if old_kind != entry.kind:
raise BzrError("entry %r changed kind from %r to %r"
% (file_id, old_kind, entry.kind))
if entry.kind == 'directory':
if not isdir(p):
raise BzrError("%s is entered as directory but not a directory" % quotefn(p))
elif entry.kind == 'file':
if not isfile(p):
raise BzrError("%s is entered as file but is not a file" % quotefn(p))
content = file(p, 'rb').read()
entry.text_sha1 = sha_string(content)
entry.text_size = len(content)
old_ie = basis_inv.has_id(file_id) and basis_inv[file_id]
if (old_ie
and (old_ie.text_size == entry.text_size)
and (old_ie.text_sha1 == entry.text_sha1)):
## assert content == basis.get_file(file_id).read()
entry.text_id = basis_inv[file_id].text_id
mutter(' unchanged from previous text_id {%s}' %
entry.text_id)
else:
entry.text_id = gen_file_id(entry.name)
branch.text_store.add(content, entry.text_id)
mutter(' stored with text_id {%s}' % entry.text_id)
if verbose:
if not old_ie:
state = 'A'
elif (old_ie.name == entry.name
and old_ie.parent_id == entry.parent_id):
state = 'M'
else:
state = 'R'
show_status(state, entry.kind, quotefn(path))
for file_id in missing_ids:
# have to do this later so we don't mess up the iterator.
# since parents may be removed before their children we
# have to test.
# FIXME: There's probably a better way to do this; perhaps
# the workingtree should know how to filter itbranch.
if work_inv.has_id(file_id):
del work_inv[file_id]
inv_id = rev_id = _gen_revision_id(time.time())
inv_tmp = tempfile.TemporaryFile()
inv.write_xml(inv_tmp)
inv_tmp.seek(0)
branch.inventory_store.add(inv_tmp, inv_id)
mutter('new inventory_id is {%s}' % inv_id)
branch._write_inventory(work_inv)
if timestamp == None:
timestamp = time.time()
if committer == None:
committer = username()
if timezone == None:
timezone = local_time_offset()
mutter("building commit log message")
rev = Revision(timestamp=timestamp,
timezone=timezone,
committer=committer,
precursor = branch.last_patch(),
message = message,
inventory_id=inv_id,
revision_id=rev_id)
rev_tmp = tempfile.TemporaryFile()
rev.write_xml(rev_tmp)
rev_tmp.seek(0)
branch.revision_store.add(rev_tmp, rev_id)
mutter("new revision_id is {%s}" % rev_id)
## XXX: Everything up to here can simply be orphaned if we abort
## the commit; it will leave junk files behind but that doesn't
## matter.
## TODO: Read back the just-generated changeset, and make sure it
## applies and recreates the right state.
## TODO: Also calculate and store the inventory SHA1
mutter("committing patch r%d" % (branch.revno() + 1))
branch.append_revision(rev_id)
if verbose:
note("commited r%d" % branch.revno())
def _gen_revision_id(when):
"""Return new revision-id."""
from binascii import hexlify
from osutils import rand_bytes, compact_date, user_email
s = '%s-%s-' % (user_email(), compact_date(when))
s += hexlify(rand_bytes(8))
return s
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