|
|
# rebase.py - rebasing feature for mercurial
|
|
|
#
|
|
|
# Copyright 2008 Stefano Tortarolo <stefano.tortarolo at gmail dot com>
|
|
|
#
|
|
|
# This software may be used and distributed according to the terms
|
|
|
# of the GNU General Public License, incorporated herein by reference.
|
|
|
|
|
|
'''move sets of revisions to a different ancestor
|
|
|
|
|
|
This extension lets you rebase changesets in an existing Mercurial repository.
|
|
|
|
|
|
For more information:
|
|
|
http://www.selenic.com/mercurial/wiki/index.cgi/RebaseProject
|
|
|
'''
|
|
|
|
|
|
from mercurial import util, repair, merge, cmdutil, commands, error
|
|
|
from mercurial import extensions, ancestor
|
|
|
from mercurial.commands import templateopts
|
|
|
from mercurial.node import nullrev
|
|
|
from mercurial.i18n import _
|
|
|
import os, errno
|
|
|
|
|
|
def rebasemerge(repo, rev, first=False):
|
|
|
'return the correct ancestor'
|
|
|
oldancestor = ancestor.ancestor
|
|
|
|
|
|
def newancestor(a, b, pfunc):
|
|
|
ancestor.ancestor = oldancestor
|
|
|
anc = ancestor.ancestor(a, b, pfunc)
|
|
|
if b == rev:
|
|
|
return repo[rev].parents()[0].rev()
|
|
|
return ancestor.ancestor(a, b, pfunc)
|
|
|
|
|
|
if not first:
|
|
|
ancestor.ancestor = newancestor
|
|
|
else:
|
|
|
repo.ui.debug(_("first revision, do not change ancestor\n"))
|
|
|
stats = merge.update(repo, rev, True, True, False)
|
|
|
return stats
|
|
|
|
|
|
def rebase(ui, repo, **opts):
|
|
|
"""move changeset (and descendants) to a different branch
|
|
|
|
|
|
Rebase uses repeated merging to graft changesets from one part of history
|
|
|
onto another. This can be useful for linearizing local changes relative to
|
|
|
a master development tree.
|
|
|
|
|
|
If a rebase is interrupted to manually resolve a merge, it can be continued
|
|
|
with --continue or aborted with --abort.
|
|
|
"""
|
|
|
originalwd = target = None
|
|
|
external = nullrev
|
|
|
state = skipped = {}
|
|
|
|
|
|
lock = wlock = None
|
|
|
try:
|
|
|
lock = repo.lock()
|
|
|
wlock = repo.wlock()
|
|
|
|
|
|
# Validate input and define rebasing points
|
|
|
destf = opts.get('dest', None)
|
|
|
srcf = opts.get('source', None)
|
|
|
basef = opts.get('base', None)
|
|
|
contf = opts.get('continue')
|
|
|
abortf = opts.get('abort')
|
|
|
collapsef = opts.get('collapse', False)
|
|
|
extrafn = opts.get('extrafn')
|
|
|
if opts.get('keepbranches', None):
|
|
|
if extrafn:
|
|
|
raise error.ParseError(
|
|
|
'rebase', _('cannot use both keepbranches and extrafn'))
|
|
|
def extrafn(ctx, extra):
|
|
|
extra['branch'] = ctx.branch()
|
|
|
|
|
|
if contf or abortf:
|
|
|
if contf and abortf:
|
|
|
raise error.ParseError('rebase',
|
|
|
_('cannot use both abort and continue'))
|
|
|
if collapsef:
|
|
|
raise error.ParseError(
|
|
|
'rebase', _('cannot use collapse with continue or abort'))
|
|
|
|
|
|
if (srcf or basef or destf):
|
|
|
raise error.ParseError('rebase',
|
|
|
_('abort and continue do not allow specifying revisions'))
|
|
|
|
|
|
originalwd, target, state, collapsef, external = restorestatus(repo)
|
|
|
if abortf:
|
|
|
abort(repo, originalwd, target, state)
|
|
|
return
|
|
|
else:
|
|
|
if srcf and basef:
|
|
|
raise error.ParseError('rebase', _('cannot specify both a '
|
|
|
'revision and a base'))
|
|
|
cmdutil.bail_if_changed(repo)
|
|
|
result = buildstate(repo, destf, srcf, basef, collapsef)
|
|
|
if result:
|
|
|
originalwd, target, state, external = result
|
|
|
else: # Empty state built, nothing to rebase
|
|
|
repo.ui.status(_('nothing to rebase\n'))
|
|
|
return
|
|
|
|
|
|
# Rebase
|
|
|
targetancestors = list(repo.changelog.ancestors(target))
|
|
|
targetancestors.append(target)
|
|
|
|
|
|
for rev in util.sort(state):
|
|
|
if state[rev] == -1:
|
|
|
storestatus(repo, originalwd, target, state, collapsef,
|
|
|
external)
|
|
|
rebasenode(repo, rev, target, state, skipped, targetancestors,
|
|
|
collapsef, extrafn)
|
|
|
ui.note(_('rebase merging completed\n'))
|
|
|
|
|
|
if collapsef:
|
|
|
p1, p2 = defineparents(repo, min(state), target,
|
|
|
state, targetancestors)
|
|
|
concludenode(repo, rev, p1, external, state, collapsef,
|
|
|
last=True, skipped=skipped, extrafn=extrafn)
|
|
|
|
|
|
if 'qtip' in repo.tags():
|
|
|
updatemq(repo, state, skipped, **opts)
|
|
|
|
|
|
if not opts.get('keep'):
|
|
|
# Remove no more useful revisions
|
|
|
if (util.set(repo.changelog.descendants(min(state)))
|
|
|
- util.set(state.keys())):
|
|
|
ui.warn(_("warning: new changesets detected on source branch, "
|
|
|
"not stripping\n"))
|
|
|
else:
|
|
|
repair.strip(repo.ui, repo, repo[min(state)].node(), "strip")
|
|
|
|
|
|
clearstatus(repo)
|
|
|
ui.status(_("rebase completed\n"))
|
|
|
if os.path.exists(repo.sjoin('undo')):
|
|
|
util.unlink(repo.sjoin('undo'))
|
|
|
if skipped:
|
|
|
ui.note(_("%d revisions have been skipped\n") % len(skipped))
|
|
|
finally:
|
|
|
del lock, wlock
|
|
|
|
|
|
def concludenode(repo, rev, p1, p2, state, collapse, last=False, skipped={},
|
|
|
extrafn=None):
|
|
|
"""Skip commit if collapsing has been required and rev is not the last
|
|
|
revision, commit otherwise
|
|
|
"""
|
|
|
repo.ui.debug(_(" set parents\n"))
|
|
|
if collapse and not last:
|
|
|
repo.dirstate.setparents(repo[p1].node())
|
|
|
return None
|
|
|
|
|
|
repo.dirstate.setparents(repo[p1].node(), repo[p2].node())
|
|
|
|
|
|
# Commit, record the old nodeid
|
|
|
m, a, r = repo.status()[:3]
|
|
|
newrev = nullrev
|
|
|
try:
|
|
|
if last:
|
|
|
commitmsg = 'Collapsed revision'
|
|
|
for rebased in state:
|
|
|
if rebased not in skipped:
|
|
|
commitmsg += '\n* %s' % repo[rebased].description()
|
|
|
commitmsg = repo.ui.edit(commitmsg, repo.ui.username())
|
|
|
else:
|
|
|
commitmsg = repo[rev].description()
|
|
|
# Commit might fail if unresolved files exist
|
|
|
extra = {'rebase_source': repo[rev].hex()}
|
|
|
if extrafn:
|
|
|
extrafn(repo[rev], extra)
|
|
|
newrev = repo.commit(m+a+r,
|
|
|
text=commitmsg,
|
|
|
user=repo[rev].user(),
|
|
|
date=repo[rev].date(),
|
|
|
extra=extra)
|
|
|
return newrev
|
|
|
except util.Abort:
|
|
|
# Invalidate the previous setparents
|
|
|
repo.dirstate.invalidate()
|
|
|
raise
|
|
|
|
|
|
def rebasenode(repo, rev, target, state, skipped, targetancestors, collapse,
|
|
|
extrafn):
|
|
|
'Rebase a single revision'
|
|
|
repo.ui.debug(_("rebasing %d:%s\n") % (rev, repo[rev]))
|
|
|
|
|
|
p1, p2 = defineparents(repo, rev, target, state, targetancestors)
|
|
|
|
|
|
repo.ui.debug(_(" future parents are %d and %d\n") % (repo[p1].rev(),
|
|
|
repo[p2].rev()))
|
|
|
|
|
|
# Merge phase
|
|
|
if len(repo.parents()) != 2:
|
|
|
# Update to target and merge it with local
|
|
|
if repo['.'].rev() != repo[p1].rev():
|
|
|
repo.ui.debug(_(" update to %d:%s\n") % (repo[p1].rev(), repo[p1]))
|
|
|
merge.update(repo, p1, False, True, False)
|
|
|
else:
|
|
|
repo.ui.debug(_(" already in target\n"))
|
|
|
repo.dirstate.write()
|
|
|
repo.ui.debug(_(" merge against %d:%s\n") % (repo[rev].rev(), repo[rev]))
|
|
|
first = repo[rev].rev() == repo[min(state)].rev()
|
|
|
stats = rebasemerge(repo, rev, first)
|
|
|
|
|
|
if stats[3] > 0:
|
|
|
raise util.Abort(_('fix unresolved conflicts with hg resolve then '
|
|
|
'run hg rebase --continue'))
|
|
|
else: # we have an interrupted rebase
|
|
|
repo.ui.debug(_('resuming interrupted rebase\n'))
|
|
|
|
|
|
|
|
|
newrev = concludenode(repo, rev, p1, p2, state, collapse,
|
|
|
extrafn=extrafn)
|
|
|
|
|
|
# Update the state
|
|
|
if newrev is not None:
|
|
|
state[rev] = repo[newrev].rev()
|
|
|
else:
|
|
|
if not collapse:
|
|
|
repo.ui.note(_('no changes, revision %d skipped\n') % rev)
|
|
|
repo.ui.debug(_('next revision set to %s\n') % p1)
|
|
|
skipped[rev] = True
|
|
|
state[rev] = p1
|
|
|
|
|
|
def defineparents(repo, rev, target, state, targetancestors):
|
|
|
'Return the new parent relationship of the revision that will be rebased'
|
|
|
parents = repo[rev].parents()
|
|
|
p1 = p2 = nullrev
|
|
|
|
|
|
P1n = parents[0].rev()
|
|
|
if P1n in targetancestors:
|
|
|
p1 = target
|
|
|
elif P1n in state:
|
|
|
p1 = state[P1n]
|
|
|
else: # P1n external
|
|
|
p1 = target
|
|
|
p2 = P1n
|
|
|
|
|
|
if len(parents) == 2 and parents[1].rev() not in targetancestors:
|
|
|
P2n = parents[1].rev()
|
|
|
# interesting second parent
|
|
|
if P2n in state:
|
|
|
if p1 == target: # P1n in targetancestors or external
|
|
|
p1 = state[P2n]
|
|
|
else:
|
|
|
p2 = state[P2n]
|
|
|
else: # P2n external
|
|
|
if p2 != nullrev: # P1n external too => rev is a merged revision
|
|
|
raise util.Abort(_('cannot use revision %d as base, result '
|
|
|
'would have 3 parents') % rev)
|
|
|
p2 = P2n
|
|
|
return p1, p2
|
|
|
|
|
|
def updatemq(repo, state, skipped, **opts):
|
|
|
'Update rebased mq patches - finalize and then import them'
|
|
|
mqrebase = {}
|
|
|
for p in repo.mq.applied:
|
|
|
if repo[p.rev].rev() in state:
|
|
|
repo.ui.debug(_('revision %d is an mq patch (%s), finalize it.\n') %
|
|
|
(repo[p.rev].rev(), p.name))
|
|
|
mqrebase[repo[p.rev].rev()] = p.name
|
|
|
|
|
|
if mqrebase:
|
|
|
repo.mq.finish(repo, mqrebase.keys())
|
|
|
|
|
|
# We must start import from the newest revision
|
|
|
mq = mqrebase.keys()
|
|
|
mq.sort()
|
|
|
mq.reverse()
|
|
|
for rev in mq:
|
|
|
if rev not in skipped:
|
|
|
repo.ui.debug(_('import mq patch %d (%s)\n')
|
|
|
% (state[rev], mqrebase[rev]))
|
|
|
repo.mq.qimport(repo, (), patchname=mqrebase[rev],
|
|
|
git=opts.get('git', False),rev=[str(state[rev])])
|
|
|
repo.mq.save_dirty()
|
|
|
|
|
|
def storestatus(repo, originalwd, target, state, collapse, external):
|
|
|
'Store the current status to allow recovery'
|
|
|
f = repo.opener("rebasestate", "w")
|
|
|
f.write(repo[originalwd].hex() + '\n')
|
|
|
f.write(repo[target].hex() + '\n')
|
|
|
f.write(repo[external].hex() + '\n')
|
|
|
f.write('%d\n' % int(collapse))
|
|
|
for d, v in state.iteritems():
|
|
|
oldrev = repo[d].hex()
|
|
|
newrev = repo[v].hex()
|
|
|
f.write("%s:%s\n" % (oldrev, newrev))
|
|
|
f.close()
|
|
|
repo.ui.debug(_('rebase status stored\n'))
|
|
|
|
|
|
def clearstatus(repo):
|
|
|
'Remove the status files'
|
|
|
if os.path.exists(repo.join("rebasestate")):
|
|
|
util.unlink(repo.join("rebasestate"))
|
|
|
|
|
|
def restorestatus(repo):
|
|
|
'Restore a previously stored status'
|
|
|
try:
|
|
|
target = None
|
|
|
collapse = False
|
|
|
external = nullrev
|
|
|
state = {}
|
|
|
f = repo.opener("rebasestate")
|
|
|
for i, l in enumerate(f.read().splitlines()):
|
|
|
if i == 0:
|
|
|
originalwd = repo[l].rev()
|
|
|
elif i == 1:
|
|
|
target = repo[l].rev()
|
|
|
elif i == 2:
|
|
|
external = repo[l].rev()
|
|
|
elif i == 3:
|
|
|
collapse = bool(int(l))
|
|
|
else:
|
|
|
oldrev, newrev = l.split(':')
|
|
|
state[repo[oldrev].rev()] = repo[newrev].rev()
|
|
|
repo.ui.debug(_('rebase status resumed\n'))
|
|
|
return originalwd, target, state, collapse, external
|
|
|
except IOError, err:
|
|
|
if err.errno != errno.ENOENT:
|
|
|
raise
|
|
|
raise util.Abort(_('no rebase in progress'))
|
|
|
|
|
|
def abort(repo, originalwd, target, state):
|
|
|
'Restore the repository to its original state'
|
|
|
if util.set(repo.changelog.descendants(target)) - util.set(state.values()):
|
|
|
repo.ui.warn(_("warning: new changesets detected on target branch, "
|
|
|
"not stripping\n"))
|
|
|
else:
|
|
|
# Strip from the first rebased revision
|
|
|
merge.update(repo, repo[originalwd].rev(), False, True, False)
|
|
|
rebased = filter(lambda x: x > -1, state.values())
|
|
|
if rebased:
|
|
|
strippoint = min(rebased)
|
|
|
repair.strip(repo.ui, repo, repo[strippoint].node(), "strip")
|
|
|
clearstatus(repo)
|
|
|
repo.ui.status(_('rebase aborted\n'))
|
|
|
|
|
|
def buildstate(repo, dest, src, base, collapse):
|
|
|
'Define which revisions are going to be rebased and where'
|
|
|
state = {}
|
|
|
targetancestors = util.set()
|
|
|
|
|
|
if not dest:
|
|
|
# Destination defaults to the latest revision in the current branch
|
|
|
branch = repo[None].branch()
|
|
|
dest = repo[branch].rev()
|
|
|
else:
|
|
|
if 'qtip' in repo.tags() and (repo[dest].hex() in
|
|
|
[s.rev for s in repo.mq.applied]):
|
|
|
raise util.Abort(_('cannot rebase onto an applied mq patch'))
|
|
|
dest = repo[dest].rev()
|
|
|
|
|
|
if src:
|
|
|
commonbase = repo[src].ancestor(repo[dest])
|
|
|
if commonbase == repo[src]:
|
|
|
raise util.Abort(_('cannot rebase an ancestor'))
|
|
|
if commonbase == repo[dest]:
|
|
|
raise util.Abort(_('cannot rebase a descendant'))
|
|
|
source = repo[src].rev()
|
|
|
else:
|
|
|
if base:
|
|
|
cwd = repo[base].rev()
|
|
|
else:
|
|
|
cwd = repo['.'].rev()
|
|
|
|
|
|
if cwd == dest:
|
|
|
repo.ui.debug(_('already working on current\n'))
|
|
|
return None
|
|
|
|
|
|
targetancestors = util.set(repo.changelog.ancestors(dest))
|
|
|
if cwd in targetancestors:
|
|
|
repo.ui.debug(_('already working on the current branch\n'))
|
|
|
return None
|
|
|
|
|
|
cwdancestors = util.set(repo.changelog.ancestors(cwd))
|
|
|
cwdancestors.add(cwd)
|
|
|
rebasingbranch = cwdancestors - targetancestors
|
|
|
source = min(rebasingbranch)
|
|
|
|
|
|
repo.ui.debug(_('rebase onto %d starting from %d\n') % (dest, source))
|
|
|
state = dict.fromkeys(repo.changelog.descendants(source), nullrev)
|
|
|
external = nullrev
|
|
|
if collapse:
|
|
|
if not targetancestors:
|
|
|
targetancestors = util.set(repo.changelog.ancestors(dest))
|
|
|
for rev in state:
|
|
|
# Check externals and fail if there are more than one
|
|
|
for p in repo[rev].parents():
|
|
|
if (p.rev() not in state and p.rev() != source
|
|
|
and p.rev() not in targetancestors):
|
|
|
if external != nullrev:
|
|
|
raise util.Abort(_('unable to collapse, there is more '
|
|
|
'than one external parent'))
|
|
|
external = p.rev()
|
|
|
|
|
|
state[source] = nullrev
|
|
|
return repo['.'].rev(), repo[dest].rev(), state, external
|
|
|
|
|
|
def pullrebase(orig, ui, repo, *args, **opts):
|
|
|
'Call rebase after pull if the latter has been invoked with --rebase'
|
|
|
if opts.get('rebase'):
|
|
|
if opts.get('update'):
|
|
|
del opts.get['update']
|
|
|
ui.debug(_('--update and --rebase are not compatible, ignoring '
|
|
|
'the update flag\n'))
|
|
|
|
|
|
cmdutil.bail_if_changed(repo)
|
|
|
revsprepull = len(repo)
|
|
|
orig(ui, repo, *args, **opts)
|
|
|
revspostpull = len(repo)
|
|
|
if revspostpull > revsprepull:
|
|
|
rebase(ui, repo, **opts)
|
|
|
branch = repo[None].branch()
|
|
|
dest = repo[branch].rev()
|
|
|
if dest != repo['.'].rev():
|
|
|
# there was nothing to rebase we force an update
|
|
|
merge.update(repo, dest, False, False, False)
|
|
|
else:
|
|
|
orig(ui, repo, *args, **opts)
|
|
|
|
|
|
def uisetup(ui):
|
|
|
'Replace pull with a decorator to provide --rebase option'
|
|
|
entry = extensions.wrapcommand(commands.table, 'pull', pullrebase)
|
|
|
entry[1].append(('', 'rebase', None,
|
|
|
_("rebase working directory to branch head"))
|
|
|
)
|
|
|
|
|
|
cmdtable = {
|
|
|
"rebase":
|
|
|
(rebase,
|
|
|
[
|
|
|
('', 'keep', False, _('keep original revisions')),
|
|
|
('', 'keepbranches', False, _('keep original branches')),
|
|
|
('s', 'source', '', _('rebase from a given revision')),
|
|
|
('b', 'base', '', _('rebase from the base of a given revision')),
|
|
|
('d', 'dest', '', _('rebase onto a given revision')),
|
|
|
('', 'collapse', False, _('collapse the rebased revisions')),
|
|
|
('c', 'continue', False, _('continue an interrupted rebase')),
|
|
|
('a', 'abort', False, _('abort an interrupted rebase')),] +
|
|
|
templateopts,
|
|
|
_('hg rebase [-s rev | -b rev] [-d rev] [--collapse] | [-c] | [-a] | '
|
|
|
'[--keep]')),
|
|
|
}
|
|
|
|
