debugcommands: introduce debugrevlogindex (BC)
`hg debugindex` was originally invented for displaying revlog index
data and is highly tailored towards that. e.g. it accepts a --format
option to display index data for a particular revlog version and
displays things like offset and length.
As we support non-revlog storage, it makes sense for `hg debugindex`
to display generic index data and for there to exist storage-specific
or storage-aware debug* commands for dumping non-generic index data.
This commit effectively renames `hg debugindex` to
`hg debugrevlogindex` and replaces `hg debugindex` with a version that
is storage agnostic.
Tests using --format have been updated to use `hg debugrevlogindex`.
Output is backwards compatible. The replacement command uses the
formatter, which means output can be templatized.
At some point, we may want to tweak output (e.g. to add the revision
size). But I don't feel like taking a bigger BC break at the moment.
The renamed command/function had to be moved because check-code
enforces alphabetical ordering of commands in this file.
Differential Revision: https://phab.mercurial-scm.org/D4358
# 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 __future__ import absolute_import
from mercurial.i18n import _
from mercurial.node import (
nullid,
short,
)
from mercurial import (
bookmarks,
cmdutil,
commands,
error,
hg,
obsolete,
phases,
pycompat,
registrar,
revsetlang,
scmutil,
)
# 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 = 'ships-with-hg-core'
@command('^split',
[('r', 'rev', '', _("revision to split"), _('REV')),
('', 'rebase', True, _('rebase descendants after split')),
] + cmdutil.commitopts2,
_('hg split [--no-rebase] [[-r] REV]'))
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.
"""
opts = pycompat.byteskwargs(opts)
revlist = []
if opts.get('rev'):
revlist.append(opts.get('rev'))
revlist.extend(revs)
with repo.wlock(), repo.lock(), repo.transaction('split') as tr:
revs = scmutil.revrange(repo, revlist or ['.'])
if len(revs) > 1:
raise error.Abort(_('cannot split multiple revisions'))
rev = revs.first()
ctx = repo[rev]
if rev is None or ctx.node() == nullid:
ui.status(_('nothing to split\n'))
return 1
if ctx.node() is None:
raise error.Abort(_('cannot split working directory'))
# rewriteutil.precheck is not very useful here because:
# 1. null check is done above and it's more friendly to return 1
# instead of abort
# 2. mergestate check is done below by cmdutil.bailifchanged
# 3. unstable check is more complex here because of --rebase
#
# So only "public" check is useful and it's checked directly here.
if ctx.phase() == phases.public:
raise error.Abort(_('cannot split public changeset'),
hint=_("see 'hg help phases' for details"))
descendants = list(repo.revs('(%d::) - (%d)', rev, rev))
alloworphaned = obsolete.isenabled(repo, obsolete.allowunstableopt)
if opts.get('rebase'):
# Skip obsoleted descendants and their descendants so the rebase
# won't cause conflicts for sure.
torebase = list(repo.revs('%ld - (%ld & obsolete())::',
descendants, descendants))
if not alloworphaned and len(torebase) != len(descendants):
raise error.Abort(_('split would leave orphaned changesets '
'behind'))
else:
if not alloworphaned and descendants:
raise error.Abort(
_('cannot split changeset with children without rebase'))
torebase = ()
if len(ctx.parents()) > 1:
raise error.Abort(_('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['.'].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
# NOTE: if we can have "update without touching working copy" API, the
# revert step could be cheaper.
hg.clean(repo, ctx.p1().node(), show_stats=False)
parents = repo.changelog.parents(ctx.node())
ui.pushbuffer()
cmdutil.revert(ui, repo, ctx, parents)
ui.popbuffer() # discard "reverting ..." messages
# Any modified, added, removed, deleted result means split is incomplete
incomplete = lambda repo: any(repo.status()[:4])
# Main split loop
while incomplete(repo):
if committed:
header = (_('HG: Splitting %s. So far it has been split into:\n')
% short(ctx.node()))
for c in committed:
firstline = c.description().split('\n', 1)[0]
header += _('HG: - %s: %s\n') % (short(c.node()), firstline)
header += _('HG: Write commit message for the next split '
'changeset.\n')
else:
header = _('HG: Splitting %s. Write commit message for the '
'first split changeset.\n') % short(ctx.node())
opts.update({
'edit': True,
'interactive': True,
'message': header + ctx.description(),
})
commands.commit(ui, repo, **pycompat.strkwargs(opts))
newctx = repo['.']
committed.append(newctx)
if not committed:
raise error.Abort(_('cannot split an empty revision'))
scmutil.cleanupnodes(repo, {ctx.node(): [c.node() for c in committed]},
operation='split', fixphase=True)
return committed[-1]
def dorebase(ui, repo, src, destctx):
rebase.rebase(ui, repo, rev=[revsetlang.formatspec('%ld', src)],
dest=revsetlang.formatspec('%d', destctx.rev()))