merge: do early copy to deal with issue636
Without copies/renames, merges source names are 1:1 with their
targets. Copies and renames introduce the possibility that there will
be two merges with the same input but different output. By doing the
copy to the destination name before the merge, the actual merge
becomes 1:1 again, and no source is the input to two different merges.
- add a preliminary scan to applyupdates to do copies
- for the merge action, pass the old name (for finding ancestors) and
the new name (for input to the merge) to filemerge
- eliminate the old post-merge copy
- lookup file contents from new name in filemerge
- pass new name to external merge helper
- report merge failure at new name
- add a test
# fetch.py - pull and merge remote changes
#
# Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com>
#
# This software may be used and distributed according to the terms
# of the GNU General Public License, incorporated herein by reference.
from mercurial.i18n import _
from mercurial.node import *
from mercurial import commands, cmdutil, hg, node, util
def fetch(ui, repo, source='default', **opts):
'''Pull changes from a remote repository, merge new changes if needed.
This finds all changes from the repository at the specified path
or URL and adds them to the local repository.
If the pulled changes add a new head, the head is automatically
merged, and the result of the merge is committed. Otherwise, the
working directory is updated.'''
def postincoming(other, modheads):
if modheads == 0:
return 0
if modheads == 1:
return hg.clean(repo, repo.changelog.tip(), wlock=wlock)
newheads = repo.heads(parent)
newchildren = [n for n in repo.heads(parent) if n != parent]
newparent = parent
if newchildren:
newparent = newchildren[0]
hg.clean(repo, newparent, wlock=wlock)
newheads = [n for n in repo.heads() if n != newparent]
err = False
if newheads:
ui.status(_('merging with new head %d:%s\n') %
(repo.changelog.rev(newheads[0]), short(newheads[0])))
err = hg.merge(repo, newheads[0], remind=False, wlock=wlock)
if not err and len(newheads) > 1:
ui.status(_('not merging with %d other new heads '
'(use "hg heads" and "hg merge" to merge them)') %
(len(newheads) - 1))
if not err:
mod, add, rem = repo.status(wlock=wlock)[:3]
message = (cmdutil.logmessage(opts) or
(_('Automated merge with %s') % other.url()))
n = repo.commit(mod + add + rem, message,
opts['user'], opts['date'], lock=lock, wlock=wlock,
force_editor=opts.get('force_editor'))
ui.status(_('new changeset %d:%s merges remote changes '
'with local\n') % (repo.changelog.rev(n),
short(n)))
def pull():
cmdutil.setremoteconfig(ui, opts)
other = hg.repository(ui, ui.expandpath(source))
ui.status(_('pulling from %s\n') % ui.expandpath(source))
revs = None
if opts['rev'] and not other.local():
raise util.Abort(_("fetch -r doesn't work for remote repositories yet"))
elif opts['rev']:
revs = [other.lookup(rev) for rev in opts['rev']]
modheads = repo.pull(other, heads=revs, lock=lock)
return postincoming(other, modheads)
parent, p2 = repo.dirstate.parents()
if parent != repo.changelog.tip():
raise util.Abort(_('working dir not at tip '
'(use "hg update" to check out tip)'))
if p2 != nullid:
raise util.Abort(_('outstanding uncommitted merge'))
wlock = repo.wlock()
lock = repo.lock()
try:
mod, add, rem = repo.status(wlock=wlock)[:3]
if mod or add or rem:
raise util.Abort(_('outstanding uncommitted changes'))
if len(repo.heads()) > 1:
raise util.Abort(_('multiple heads in this repository '
'(use "hg heads" and "hg merge" to merge)'))
return pull()
finally:
lock.release()
wlock.release()
cmdtable = {
'fetch':
(fetch,
[('e', 'ssh', '', _('specify ssh command to use')),
('m', 'message', '', _('use <text> as commit message')),
('l', 'logfile', '', _('read the commit message from <file>')),
('d', 'date', '', _('record datecode as commit date')),
('u', 'user', '', _('record user as commiter')),
('r', 'rev', [], _('a specific revision you would like to pull')),
('f', 'force-editor', None, _('edit commit message')),
('', 'remotecmd', '', _('hg command to run on the remote side'))],
_('hg fetch [SOURCE]')),
}