|
|
# split.py - split a changeset into smaller ones
|
|
|
#
|
|
|
# Copyright 2015 Laurent Charignon <lcharignon@fb.com>
|
|
|
# Copyright 2017 Facebook, Inc.
|
|
|
#
|
|
|
# This software may be used and distributed according to the terms of the
|
|
|
# GNU General Public License version 2 or any later version.
|
|
|
"""command to split a changeset into smaller ones (EXPERIMENTAL)"""
|
|
|
|
|
|
|
|
|
from mercurial.i18n import _
|
|
|
|
|
|
from mercurial.node import (
|
|
|
nullrev,
|
|
|
short,
|
|
|
)
|
|
|
|
|
|
from mercurial import (
|
|
|
bookmarks,
|
|
|
cmdutil,
|
|
|
commands,
|
|
|
error,
|
|
|
hg,
|
|
|
logcmdutil,
|
|
|
registrar,
|
|
|
revsetlang,
|
|
|
rewriteutil,
|
|
|
scmutil,
|
|
|
util,
|
|
|
)
|
|
|
|
|
|
# allow people to use split without explicitly enabling rebase extension
|
|
|
from . import rebase
|
|
|
|
|
|
cmdtable = {}
|
|
|
command = registrar.command(cmdtable)
|
|
|
|
|
|
# Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for
|
|
|
# extensions which SHIP WITH MERCURIAL. Non-mainline extensions should
|
|
|
# be specifying the version(s) of Mercurial they are tested with, or
|
|
|
# leave the attribute unspecified.
|
|
|
testedwith = b'ships-with-hg-core'
|
|
|
|
|
|
|
|
|
@command(
|
|
|
b'split',
|
|
|
[
|
|
|
(b'r', b'rev', b'', _(b"revision to split"), _(b'REV')),
|
|
|
(b'', b'rebase', True, _(b'rebase descendants after split')),
|
|
|
]
|
|
|
+ cmdutil.commitopts2,
|
|
|
_(b'hg split [--no-rebase] [[-r] REV]'),
|
|
|
helpcategory=command.CATEGORY_CHANGE_MANAGEMENT,
|
|
|
helpbasic=True,
|
|
|
)
|
|
|
def split(ui, repo, *revs, **opts):
|
|
|
"""split a changeset into smaller ones
|
|
|
|
|
|
Repeatedly prompt changes and commit message for new changesets until there
|
|
|
is nothing left in the original changeset.
|
|
|
|
|
|
If --rev was not given, split the working directory parent.
|
|
|
|
|
|
By default, rebase connected non-obsoleted descendants onto the new
|
|
|
changeset. Use --no-rebase to avoid the rebase.
|
|
|
"""
|
|
|
revlist = []
|
|
|
if opts.get('rev'):
|
|
|
revlist.append(opts.get('rev'))
|
|
|
revlist.extend(revs)
|
|
|
with repo.wlock(), repo.lock():
|
|
|
tr = repo.transaction(b'split')
|
|
|
# If the rebase somehow runs into conflicts, make sure
|
|
|
# we close the transaction so the user can continue it.
|
|
|
with util.acceptintervention(tr):
|
|
|
revs = logcmdutil.revrange(repo, revlist or [b'.'])
|
|
|
if len(revs) > 1:
|
|
|
raise error.InputError(_(b'cannot split multiple revisions'))
|
|
|
|
|
|
rev = revs.first()
|
|
|
# Handle nullrev specially here (instead of leaving for precheck()
|
|
|
# below) so we get a nicer message and error code.
|
|
|
if rev is None or rev == nullrev:
|
|
|
ui.status(_(b'nothing to split\n'))
|
|
|
return 1
|
|
|
ctx = repo[rev]
|
|
|
if ctx.node() is None:
|
|
|
raise error.InputError(_(b'cannot split working directory'))
|
|
|
|
|
|
if opts.get('rebase'):
|
|
|
# Skip obsoleted descendants and their descendants so the rebase
|
|
|
# won't cause conflicts for sure.
|
|
|
descendants = list(repo.revs(b'(%d::) - (%d)', rev, rev))
|
|
|
torebase = list(
|
|
|
repo.revs(
|
|
|
b'%ld - (%ld & obsolete())::', descendants, descendants
|
|
|
)
|
|
|
)
|
|
|
else:
|
|
|
torebase = []
|
|
|
rewriteutil.precheck(repo, [rev] + torebase, b'split')
|
|
|
|
|
|
if len(ctx.parents()) > 1:
|
|
|
raise error.InputError(_(b'cannot split a merge changeset'))
|
|
|
|
|
|
cmdutil.bailifchanged(repo)
|
|
|
|
|
|
# Deactivate bookmark temporarily so it won't get moved
|
|
|
# unintentionally
|
|
|
bname = repo._activebookmark
|
|
|
if bname and repo._bookmarks[bname] != ctx.node():
|
|
|
bookmarks.deactivate(repo)
|
|
|
|
|
|
wnode = repo[b'.'].node()
|
|
|
top = None
|
|
|
try:
|
|
|
top = dosplit(ui, repo, tr, ctx, **opts)
|
|
|
finally:
|
|
|
# top is None: split failed, need update --clean recovery.
|
|
|
# wnode == ctx.node(): wnode split, no need to update.
|
|
|
if top is None or wnode != ctx.node():
|
|
|
hg.clean(repo, wnode, show_stats=False)
|
|
|
if bname:
|
|
|
bookmarks.activate(repo, bname)
|
|
|
if torebase and top:
|
|
|
dorebase(ui, repo, torebase, top)
|
|
|
|
|
|
|
|
|
def dosplit(ui, repo, tr, ctx, **opts):
|
|
|
committed = [] # [ctx]
|
|
|
|
|
|
# Set working parent to ctx.p1(), and keep working copy as ctx's content
|
|
|
if ctx.node() != repo.dirstate.p1():
|
|
|
hg.clean(repo, ctx.node(), show_stats=False)
|
|
|
with repo.dirstate.changing_parents(repo):
|
|
|
scmutil.movedirstate(repo, ctx.p1())
|
|
|
|
|
|
# Any modified, added, removed, deleted result means split is incomplete
|
|
|
def incomplete(repo):
|
|
|
st = repo.status()
|
|
|
return any((st.modified, st.added, st.removed, st.deleted))
|
|
|
|
|
|
# Main split loop
|
|
|
while incomplete(repo):
|
|
|
if committed:
|
|
|
header = _(
|
|
|
b'HG: Splitting %s. So far it has been split into:\n'
|
|
|
) % short(ctx.node())
|
|
|
# We don't want color codes in the commit message template, so
|
|
|
# disable the label() template function while we render it.
|
|
|
with ui.configoverride(
|
|
|
{(b'templatealias', b'label(l,x)'): b"x"}, b'split'
|
|
|
):
|
|
|
for c in committed:
|
|
|
summary = cmdutil.format_changeset_summary(ui, c, b'split')
|
|
|
header += _(b'HG: - %s\n') % summary
|
|
|
header += _(
|
|
|
b'HG: Write commit message for the next split changeset.\n'
|
|
|
)
|
|
|
else:
|
|
|
header = _(
|
|
|
b'HG: Splitting %s. Write commit message for the '
|
|
|
b'first split changeset.\n'
|
|
|
) % short(ctx.node())
|
|
|
opts.update(
|
|
|
{
|
|
|
'edit': True,
|
|
|
'interactive': True,
|
|
|
'message': header + ctx.description(),
|
|
|
}
|
|
|
)
|
|
|
origctx = repo[b'.']
|
|
|
commands.commit(ui, repo, **opts)
|
|
|
newctx = repo[b'.']
|
|
|
# Ensure user didn't do a "no-op" split (such as deselecting
|
|
|
# everything).
|
|
|
if origctx.node() != newctx.node():
|
|
|
committed.append(newctx)
|
|
|
|
|
|
if not committed:
|
|
|
raise error.InputError(_(b'cannot split an empty revision'))
|
|
|
|
|
|
if len(committed) != 1 or committed[0].node() != ctx.node():
|
|
|
# Ensure we don't strip a node if we produce the same commit as already
|
|
|
# exists
|
|
|
scmutil.cleanupnodes(
|
|
|
repo,
|
|
|
{ctx.node(): [c.node() for c in committed]},
|
|
|
operation=b'split',
|
|
|
fixphase=True,
|
|
|
)
|
|
|
|
|
|
return committed[-1]
|
|
|
|
|
|
|
|
|
def dorebase(ui, repo, src, destctx):
|
|
|
rebase.rebase(
|
|
|
ui,
|
|
|
repo,
|
|
|
rev=[revsetlang.formatspec(b'%ld', src)],
|
|
|
dest=revsetlang.formatspec(b'%d', destctx.rev()),
|
|
|
)
|
|
|
|
