merge: have merge.update use a matcher instead of partial fn
This is relatively rarely used functionality, but migrating this to a
matcher will make future work on narrow clones more feasible.
# histedit.py - interactive history editing for mercurial
#
# Copyright 2009 Augie Fackler <raf@durin42.com>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
"""interactive history editing
With this extension installed, Mercurial gains one new command: histedit. Usage
is as follows, assuming the following history::
@ 3[tip] 7c2fd3b9020c 2009-04-27 18:04 -0500 durin42
| Add delta
|
o 2 030b686bedc4 2009-04-27 18:04 -0500 durin42
| Add gamma
|
o 1 c561b4e977df 2009-04-27 18:04 -0500 durin42
| Add beta
|
o 0 d8d2fcd0e319 2009-04-27 18:04 -0500 durin42
Add alpha
If you were to run ``hg histedit c561b4e977df``, you would see the following
file open in your editor::
pick c561b4e977df Add beta
pick 030b686bedc4 Add gamma
pick 7c2fd3b9020c Add delta
# Edit history between c561b4e977df and 7c2fd3b9020c
#
# Commits are listed from least to most recent
#
# Commands:
# p, pick = use commit
# e, edit = use commit, but stop for amending
# f, fold = use commit, but combine it with the one above
# r, roll = like fold, but discard this commit's description
# d, drop = remove commit from history
# m, mess = edit commit message without changing commit content
#
In this file, lines beginning with ``#`` are ignored. You must specify a rule
for each revision in your history. For example, if you had meant to add gamma
before beta, and then wanted to add delta in the same revision as beta, you
would reorganize the file to look like this::
pick 030b686bedc4 Add gamma
pick c561b4e977df Add beta
fold 7c2fd3b9020c Add delta
# Edit history between c561b4e977df and 7c2fd3b9020c
#
# Commits are listed from least to most recent
#
# Commands:
# p, pick = use commit
# e, edit = use commit, but stop for amending
# f, fold = use commit, but combine it with the one above
# r, roll = like fold, but discard this commit's description
# d, drop = remove commit from history
# m, mess = edit commit message without changing commit content
#
At which point you close the editor and ``histedit`` starts working. When you
specify a ``fold`` operation, ``histedit`` will open an editor when it folds
those revisions together, offering you a chance to clean up the commit message::
Add beta
***
Add delta
Edit the commit message to your liking, then close the editor. For
this example, let's assume that the commit message was changed to
``Add beta and delta.`` After histedit has run and had a chance to
remove any old or temporary revisions it needed, the history looks
like this::
@ 2[tip] 989b4d060121 2009-04-27 18:04 -0500 durin42
| Add beta and delta.
|
o 1 081603921c3f 2009-04-27 18:04 -0500 durin42
| Add gamma
|
o 0 d8d2fcd0e319 2009-04-27 18:04 -0500 durin42
Add alpha
Note that ``histedit`` does *not* remove any revisions (even its own temporary
ones) until after it has completed all the editing operations, so it will
probably perform several strip operations when it's done. For the above example,
it had to run strip twice. Strip can be slow depending on a variety of factors,
so you might need to be a little patient. You can choose to keep the original
revisions by passing the ``--keep`` flag.
The ``edit`` operation will drop you back to a command prompt,
allowing you to edit files freely, or even use ``hg record`` to commit
some changes as a separate commit. When you're done, any remaining
uncommitted changes will be committed as well. When done, run ``hg
histedit --continue`` to finish this step. You'll be prompted for a
new commit message, but the default commit message will be the
original message for the ``edit`` ed revision.
The ``message`` operation will give you a chance to revise a commit
message without changing the contents. It's a shortcut for doing
``edit`` immediately followed by `hg histedit --continue``.
If ``histedit`` encounters a conflict when moving a revision (while
handling ``pick`` or ``fold``), it'll stop in a similar manner to
``edit`` with the difference that it won't prompt you for a commit
message when done. If you decide at this point that you don't like how
much work it will be to rearrange history, or that you made a mistake,
you can use ``hg histedit --abort`` to abandon the new changes you
have made and return to the state before you attempted to edit your
history.
If we clone the histedit-ed example repository above and add four more
changes, such that we have the following history::
@ 6[tip] 038383181893 2009-04-27 18:04 -0500 stefan
| Add theta
|
o 5 140988835471 2009-04-27 18:04 -0500 stefan
| Add eta
|
o 4 122930637314 2009-04-27 18:04 -0500 stefan
| Add zeta
|
o 3 836302820282 2009-04-27 18:04 -0500 stefan
| Add epsilon
|
o 2 989b4d060121 2009-04-27 18:04 -0500 durin42
| Add beta and delta.
|
o 1 081603921c3f 2009-04-27 18:04 -0500 durin42
| Add gamma
|
o 0 d8d2fcd0e319 2009-04-27 18:04 -0500 durin42
Add alpha
If you run ``hg histedit --outgoing`` on the clone then it is the same
as running ``hg histedit 836302820282``. If you need plan to push to a
repository that Mercurial does not detect to be related to the source
repo, you can add a ``--force`` option.
Histedit rule lines are truncated to 80 characters by default. You
can customize this behavior by setting a different length in your
configuration file::
[histedit]
linelen = 120 # truncate rule lines at 120 characters
``hg histedit`` attempts to automatically choose an appropriate base
revision to use. To change which base revision is used, define a
revset in your configuration file::
[histedit]
defaultrev = only(.) & draft()
"""
try:
import cPickle as pickle
pickle.dump # import now
except ImportError:
import pickle
import errno
import os
import sys
from mercurial import bundle2
from mercurial import cmdutil
from mercurial import discovery
from mercurial import error
from mercurial import copies
from mercurial import context
from mercurial import destutil
from mercurial import exchange
from mercurial import extensions
from mercurial import hg
from mercurial import node
from mercurial import repair
from mercurial import scmutil
from mercurial import util
from mercurial import obsolete
from mercurial import merge as mergemod
from mercurial.lock import release
from mercurial.i18n import _
cmdtable = {}
command = cmdutil.command(cmdtable)
class _constraints(object):
# aborts if there are multiple rules for one node
noduplicates = 'noduplicates'
# abort if the node does belong to edited stack
forceother = 'forceother'
# abort if the node doesn't belong to edited stack
noother = 'noother'
@classmethod
def known(cls):
return set([v for k, v in cls.__dict__.items() if k[0] != '_'])
# Note for extension authors: ONLY specify testedwith = 'internal' 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 = 'internal'
# i18n: command names and abbreviations must remain untranslated
editcomment = _("""# Edit history between %s and %s
#
# Commits are listed from least to most recent
#
# Commands:
# p, pick = use commit
# e, edit = use commit, but stop for amending
# f, fold = use commit, but combine it with the one above
# r, roll = like fold, but discard this commit's description
# d, drop = remove commit from history
# m, mess = edit commit message without changing commit content
#
""")
class histeditstate(object):
def __init__(self, repo, parentctxnode=None, actions=None, keep=None,
topmost=None, replacements=None, lock=None, wlock=None):
self.repo = repo
self.actions = actions
self.keep = keep
self.topmost = topmost
self.parentctxnode = parentctxnode
self.lock = lock
self.wlock = wlock
self.backupfile = None
if replacements is None:
self.replacements = []
else:
self.replacements = replacements
def read(self):
"""Load histedit state from disk and set fields appropriately."""
try:
fp = self.repo.vfs('histedit-state', 'r')
except IOError as err:
if err.errno != errno.ENOENT:
raise
raise error.Abort(_('no histedit in progress'))
try:
data = pickle.load(fp)
parentctxnode, rules, keep, topmost, replacements = data
backupfile = None
except pickle.UnpicklingError:
data = self._load()
parentctxnode, rules, keep, topmost, replacements, backupfile = data
self.parentctxnode = parentctxnode
rules = "\n".join(["%s %s" % (verb, rest) for [verb, rest] in rules])
actions = parserules(rules, self)
self.actions = actions
self.keep = keep
self.topmost = topmost
self.replacements = replacements
self.backupfile = backupfile
def write(self):
fp = self.repo.vfs('histedit-state', 'w')
fp.write('v1\n')
fp.write('%s\n' % node.hex(self.parentctxnode))
fp.write('%s\n' % node.hex(self.topmost))
fp.write('%s\n' % self.keep)
fp.write('%d\n' % len(self.actions))
for action in self.actions:
fp.write('%s\n' % action.tostate())
fp.write('%d\n' % len(self.replacements))
for replacement in self.replacements:
fp.write('%s%s\n' % (node.hex(replacement[0]), ''.join(node.hex(r)
for r in replacement[1])))
backupfile = self.backupfile
if not backupfile:
backupfile = ''
fp.write('%s\n' % backupfile)
fp.close()
def _load(self):
fp = self.repo.vfs('histedit-state', 'r')
lines = [l[:-1] for l in fp.readlines()]
index = 0
lines[index] # version number
index += 1
parentctxnode = node.bin(lines[index])
index += 1
topmost = node.bin(lines[index])
index += 1
keep = lines[index] == 'True'
index += 1
# Rules
rules = []
rulelen = int(lines[index])
index += 1
for i in xrange(rulelen):
ruleaction = lines[index]
index += 1
rule = lines[index]
index += 1
rules.append((ruleaction, rule))
# Replacements
replacements = []
replacementlen = int(lines[index])
index += 1
for i in xrange(replacementlen):
replacement = lines[index]
original = node.bin(replacement[:40])
succ = [node.bin(replacement[i:i + 40]) for i in
range(40, len(replacement), 40)]
replacements.append((original, succ))
index += 1
backupfile = lines[index]
index += 1
fp.close()
return parentctxnode, rules, keep, topmost, replacements, backupfile
def clear(self):
if self.inprogress():
self.repo.vfs.unlink('histedit-state')
def inprogress(self):
return self.repo.vfs.exists('histedit-state')
class histeditaction(object):
def __init__(self, state, node):
self.state = state
self.repo = state.repo
self.node = node
@classmethod
def fromrule(cls, state, rule):
"""Parses the given rule, returning an instance of the histeditaction.
"""
rulehash = rule.strip().split(' ', 1)[0]
return cls(state, node.bin(rulehash))
def verify(self):
""" Verifies semantic correctness of the rule"""
repo = self.repo
ha = node.hex(self.node)
try:
self.node = repo[ha].node()
except error.RepoError:
raise error.Abort(_('unknown changeset %s listed')
% ha[:12])
def torule(self):
"""build a histedit rule line for an action
by default lines are in the form:
<hash> <rev> <summary>
"""
ctx = self.repo[self.node]
summary = ''
if ctx.description():
summary = ctx.description().splitlines()[0]
line = '%s %s %d %s' % (self.verb, ctx, ctx.rev(), summary)
# trim to 75 columns by default so it's not stupidly wide in my editor
# (the 5 more are left for verb)
maxlen = self.repo.ui.configint('histedit', 'linelen', default=80)
maxlen = max(maxlen, 22) # avoid truncating hash
return util.ellipsis(line, maxlen)
def tostate(self):
"""Print an action in format used by histedit state files
(the first line is a verb, the remainder is the second)
"""
return "%s\n%s" % (self.verb, node.hex(self.node))
def constraints(self):
"""Return a set of constrains that this action should be verified for
"""
return set([_constraints.noduplicates, _constraints.noother])
def nodetoverify(self):
"""Returns a node associated with the action that will be used for
verification purposes.
If the action doesn't correspond to node it should return None
"""
return self.node
def run(self):
"""Runs the action. The default behavior is simply apply the action's
rulectx onto the current parentctx."""
self.applychange()
self.continuedirty()
return self.continueclean()
def applychange(self):
"""Applies the changes from this action's rulectx onto the current
parentctx, but does not commit them."""
repo = self.repo
rulectx = repo[self.node]
hg.update(repo, self.state.parentctxnode)
stats = applychanges(repo.ui, repo, rulectx, {})
if stats and stats[3] > 0:
raise error.InterventionRequired(_('Fix up the change and run '
'hg histedit --continue'))
def continuedirty(self):
"""Continues the action when changes have been applied to the working
copy. The default behavior is to commit the dirty changes."""
repo = self.repo
rulectx = repo[self.node]
editor = self.commiteditor()
commit = commitfuncfor(repo, rulectx)
commit(text=rulectx.description(), user=rulectx.user(),
date=rulectx.date(), extra=rulectx.extra(), editor=editor)
def commiteditor(self):
"""The editor to be used to edit the commit message."""
return False
def continueclean(self):
"""Continues the action when the working copy is clean. The default
behavior is to accept the current commit as the new version of the
rulectx."""
ctx = self.repo['.']
if ctx.node() == self.state.parentctxnode:
self.repo.ui.warn(_('%s: empty changeset\n') %
node.short(self.node))
return ctx, [(self.node, tuple())]
if ctx.node() == self.node:
# Nothing changed
return ctx, []
return ctx, [(self.node, (ctx.node(),))]
def commitfuncfor(repo, src):
"""Build a commit function for the replacement of <src>
This function ensure we apply the same treatment to all changesets.
- Add a 'histedit_source' entry in extra.
Note that fold has its own separated logic because its handling is a bit
different and not easily factored out of the fold method.
"""
phasemin = src.phase()
def commitfunc(**kwargs):
phasebackup = repo.ui.backupconfig('phases', 'new-commit')
try:
repo.ui.setconfig('phases', 'new-commit', phasemin,
'histedit')
extra = kwargs.get('extra', {}).copy()
extra['histedit_source'] = src.hex()
kwargs['extra'] = extra
return repo.commit(**kwargs)
finally:
repo.ui.restoreconfig(phasebackup)
return commitfunc
def applychanges(ui, repo, ctx, opts):
"""Merge changeset from ctx (only) in the current working directory"""
wcpar = repo.dirstate.parents()[0]
if ctx.p1().node() == wcpar:
# edits are "in place" we do not need to make any merge,
# just applies changes on parent for edition
cmdutil.revert(ui, repo, ctx, (wcpar, node.nullid), all=True)
stats = None
else:
try:
# ui.forcemerge is an internal variable, do not document
repo.ui.setconfig('ui', 'forcemerge', opts.get('tool', ''),
'histedit')
stats = mergemod.graft(repo, ctx, ctx.p1(), ['local', 'histedit'])
finally:
repo.ui.setconfig('ui', 'forcemerge', '', 'histedit')
return stats
def collapse(repo, first, last, commitopts, skipprompt=False):
"""collapse the set of revisions from first to last as new one.
Expected commit options are:
- message
- date
- username
Commit message is edited in all cases.
This function works in memory."""
ctxs = list(repo.set('%d::%d', first, last))
if not ctxs:
return None
for c in ctxs:
if not c.mutable():
raise error.Abort(
_("cannot fold into public change %s") % node.short(c.node()))
base = first.parents()[0]
# commit a new version of the old changeset, including the update
# collect all files which might be affected
files = set()
for ctx in ctxs:
files.update(ctx.files())
# Recompute copies (avoid recording a -> b -> a)
copied = copies.pathcopies(base, last)
# prune files which were reverted by the updates
def samefile(f):
if f in last.manifest():
a = last.filectx(f)
if f in base.manifest():
b = base.filectx(f)
return (a.data() == b.data()
and a.flags() == b.flags())
else:
return False
else:
return f not in base.manifest()
files = [f for f in files if not samefile(f)]
# commit version of these files as defined by head
headmf = last.manifest()
def filectxfn(repo, ctx, path):
if path in headmf:
fctx = last[path]
flags = fctx.flags()
mctx = context.memfilectx(repo,
fctx.path(), fctx.data(),
islink='l' in flags,
isexec='x' in flags,
copied=copied.get(path))
return mctx
return None
if commitopts.get('message'):
message = commitopts['message']
else:
message = first.description()
user = commitopts.get('user')
date = commitopts.get('date')
extra = commitopts.get('extra')
parents = (first.p1().node(), first.p2().node())
editor = None
if not skipprompt:
editor = cmdutil.getcommiteditor(edit=True, editform='histedit.fold')
new = context.memctx(repo,
parents=parents,
text=message,
files=files,
filectxfn=filectxfn,
user=user,
date=date,
extra=extra,
editor=editor)
return repo.commitctx(new)
def _isdirtywc(repo):
return repo[None].dirty(missing=True)
def abortdirty():
raise error.Abort(_('working copy has pending changes'),
hint=_('amend, commit, or revert them and run histedit '
'--continue, or abort with histedit --abort'))
actiontable = {}
actionlist = []
def addhisteditaction(verbs):
def wrap(cls):
cls.verb = verbs[0]
for verb in verbs:
actiontable[verb] = cls
actionlist.append(cls)
return cls
return wrap
@addhisteditaction(['pick', 'p'])
class pick(histeditaction):
def run(self):
rulectx = self.repo[self.node]
if rulectx.parents()[0].node() == self.state.parentctxnode:
self.repo.ui.debug('node %s unchanged\n' % node.short(self.node))
return rulectx, []
return super(pick, self).run()
@addhisteditaction(['edit', 'e'])
class edit(histeditaction):
def run(self):
repo = self.repo
rulectx = repo[self.node]
hg.update(repo, self.state.parentctxnode)
applychanges(repo.ui, repo, rulectx, {})
raise error.InterventionRequired(
_('Make changes as needed, you may commit or record as needed '
'now.\nWhen you are finished, run hg histedit --continue to '
'resume.'))
def commiteditor(self):
return cmdutil.getcommiteditor(edit=True, editform='histedit.edit')
@addhisteditaction(['fold', 'f'])
class fold(histeditaction):
def continuedirty(self):
repo = self.repo
rulectx = repo[self.node]
commit = commitfuncfor(repo, rulectx)
commit(text='fold-temp-revision %s' % node.short(self.node),
user=rulectx.user(), date=rulectx.date(),
extra=rulectx.extra())
def continueclean(self):
repo = self.repo
ctx = repo['.']
rulectx = repo[self.node]
parentctxnode = self.state.parentctxnode
if ctx.node() == parentctxnode:
repo.ui.warn(_('%s: empty changeset\n') %
node.short(self.node))
return ctx, [(self.node, (parentctxnode,))]
parentctx = repo[parentctxnode]
newcommits = set(c.node() for c in repo.set('(%d::. - %d)', parentctx,
parentctx))
if not newcommits:
repo.ui.warn(_('%s: cannot fold - working copy is not a '
'descendant of previous commit %s\n') %
(node.short(self.node), node.short(parentctxnode)))
return ctx, [(self.node, (ctx.node(),))]
middlecommits = newcommits.copy()
middlecommits.discard(ctx.node())
return self.finishfold(repo.ui, repo, parentctx, rulectx, ctx.node(),
middlecommits)
def skipprompt(self):
"""Returns true if the rule should skip the message editor.
For example, 'fold' wants to show an editor, but 'rollup'
doesn't want to.
"""
return False
def mergedescs(self):
"""Returns true if the rule should merge messages of multiple changes.
This exists mainly so that 'rollup' rules can be a subclass of
'fold'.
"""
return True
def finishfold(self, ui, repo, ctx, oldctx, newnode, internalchanges):
parent = ctx.parents()[0].node()
hg.update(repo, parent)
### prepare new commit data
commitopts = {}
commitopts['user'] = ctx.user()
# commit message
if not self.mergedescs():
newmessage = ctx.description()
else:
newmessage = '\n***\n'.join(
[ctx.description()] +
[repo[r].description() for r in internalchanges] +
[oldctx.description()]) + '\n'
commitopts['message'] = newmessage
# date
commitopts['date'] = max(ctx.date(), oldctx.date())
extra = ctx.extra().copy()
# histedit_source
# note: ctx is likely a temporary commit but that the best we can do
# here. This is sufficient to solve issue3681 anyway.
extra['histedit_source'] = '%s,%s' % (ctx.hex(), oldctx.hex())
commitopts['extra'] = extra
phasebackup = repo.ui.backupconfig('phases', 'new-commit')
try:
phasemin = max(ctx.phase(), oldctx.phase())
repo.ui.setconfig('phases', 'new-commit', phasemin, 'histedit')
n = collapse(repo, ctx, repo[newnode], commitopts,
skipprompt=self.skipprompt())
finally:
repo.ui.restoreconfig(phasebackup)
if n is None:
return ctx, []
hg.update(repo, n)
replacements = [(oldctx.node(), (newnode,)),
(ctx.node(), (n,)),
(newnode, (n,)),
]
for ich in internalchanges:
replacements.append((ich, (n,)))
return repo[n], replacements
class base(histeditaction):
def constraints(self):
return set([_constraints.forceother])
def run(self):
if self.repo['.'].node() != self.node:
mergemod.update(self.repo, self.node, False, True)
# branchmerge, force)
return self.continueclean()
def continuedirty(self):
abortdirty()
def continueclean(self):
basectx = self.repo['.']
return basectx, []
@addhisteditaction(['_multifold'])
class _multifold(fold):
"""fold subclass used for when multiple folds happen in a row
We only want to fire the editor for the folded message once when
(say) four changes are folded down into a single change. This is
similar to rollup, but we should preserve both messages so that
when the last fold operation runs we can show the user all the
commit messages in their editor.
"""
def skipprompt(self):
return True
@addhisteditaction(["roll", "r"])
class rollup(fold):
def mergedescs(self):
return False
def skipprompt(self):
return True
@addhisteditaction(["drop", "d"])
class drop(histeditaction):
def run(self):
parentctx = self.repo[self.state.parentctxnode]
return parentctx, [(self.node, tuple())]
@addhisteditaction(["mess", "m"])
class message(histeditaction):
def commiteditor(self):
return cmdutil.getcommiteditor(edit=True, editform='histedit.mess')
def findoutgoing(ui, repo, remote=None, force=False, opts=None):
"""utility function to find the first outgoing changeset
Used by initialization code"""
if opts is None:
opts = {}
dest = ui.expandpath(remote or 'default-push', remote or 'default')
dest, revs = hg.parseurl(dest, None)[:2]
ui.status(_('comparing with %s\n') % util.hidepassword(dest))
revs, checkout = hg.addbranchrevs(repo, repo, revs, None)
other = hg.peer(repo, opts, dest)
if revs:
revs = [repo.lookup(rev) for rev in revs]
outgoing = discovery.findcommonoutgoing(repo, other, revs, force=force)
if not outgoing.missing:
raise error.Abort(_('no outgoing ancestors'))
roots = list(repo.revs("roots(%ln)", outgoing.missing))
if 1 < len(roots):
msg = _('there are ambiguous outgoing revisions')
hint = _('see "hg help histedit" for more detail')
raise error.Abort(msg, hint=hint)
return repo.lookup(roots[0])
@command('histedit',
[('', 'commands', '',
_('read history edits from the specified file'), _('FILE')),
('c', 'continue', False, _('continue an edit already in progress')),
('', 'edit-plan', False, _('edit remaining actions list')),
('k', 'keep', False,
_("don't strip old nodes after edit is complete")),
('', 'abort', False, _('abort an edit in progress')),
('o', 'outgoing', False, _('changesets not found in destination')),
('f', 'force', False,
_('force outgoing even for unrelated repositories')),
('r', 'rev', [], _('first revision to be edited'), _('REV'))],
_("[ANCESTOR] | --outgoing [URL]"))
def histedit(ui, repo, *freeargs, **opts):
"""interactively edit changeset history
This command edits changesets between an ANCESTOR and the parent of
the working directory.
The value from the "histedit.defaultrev" config option is used as a
revset to select the base revision when ANCESTOR is not specified.
The first revision returned by the revset is used. By default, this
selects the editable history that is unique to the ancestry of the
working directory.
With --outgoing, this edits changesets not found in the
destination repository. If URL of the destination is omitted, the
'default-push' (or 'default') path will be used.
For safety, this command is also aborted if there are ambiguous
outgoing revisions which may confuse users: for example, if there
are multiple branches containing outgoing revisions.
Use "min(outgoing() and ::.)" or similar revset specification
instead of --outgoing to specify edit target revision exactly in
such ambiguous situation. See :hg:`help revsets` for detail about
selecting revisions.
.. container:: verbose
Examples:
- A number of changes have been made.
Revision 3 is no longer needed.
Start history editing from revision 3::
hg histedit -r 3
An editor opens, containing the list of revisions,
with specific actions specified::
pick 5339bf82f0ca 3 Zworgle the foobar
pick 8ef592ce7cc4 4 Bedazzle the zerlog
pick 0a9639fcda9d 5 Morgify the cromulancy
Additional information about the possible actions
to take appears below the list of revisions.
To remove revision 3 from the history,
its action (at the beginning of the relevant line)
is changed to 'drop'::
drop 5339bf82f0ca 3 Zworgle the foobar
pick 8ef592ce7cc4 4 Bedazzle the zerlog
pick 0a9639fcda9d 5 Morgify the cromulancy
- A number of changes have been made.
Revision 2 and 4 need to be swapped.
Start history editing from revision 2::
hg histedit -r 2
An editor opens, containing the list of revisions,
with specific actions specified::
pick 252a1af424ad 2 Blorb a morgwazzle
pick 5339bf82f0ca 3 Zworgle the foobar
pick 8ef592ce7cc4 4 Bedazzle the zerlog
To swap revision 2 and 4, its lines are swapped
in the editor::
pick 8ef592ce7cc4 4 Bedazzle the zerlog
pick 5339bf82f0ca 3 Zworgle the foobar
pick 252a1af424ad 2 Blorb a morgwazzle
Returns 0 on success, 1 if user intervention is required (not only
for intentional "edit" command, but also for resolving unexpected
conflicts).
"""
state = histeditstate(repo)
try:
state.wlock = repo.wlock()
state.lock = repo.lock()
_histedit(ui, repo, state, *freeargs, **opts)
except error.Abort:
if repo.vfs.exists('histedit-last-edit.txt'):
ui.warn(_('warning: histedit rules saved '
'to: .hg/histedit-last-edit.txt\n'))
raise
finally:
release(state.lock, state.wlock)
def _histedit(ui, repo, state, *freeargs, **opts):
# TODO only abort if we try to histedit mq patches, not just
# blanket if mq patches are applied somewhere
mq = getattr(repo, 'mq', None)
if mq and mq.applied:
raise error.Abort(_('source has mq patches applied'))
# basic argument incompatibility processing
outg = opts.get('outgoing')
cont = opts.get('continue')
editplan = opts.get('edit_plan')
abort = opts.get('abort')
force = opts.get('force')
rules = opts.get('commands', '')
revs = opts.get('rev', [])
goal = 'new' # This invocation goal, in new, continue, abort
if force and not outg:
raise error.Abort(_('--force only allowed with --outgoing'))
if cont:
if any((outg, abort, revs, freeargs, rules, editplan)):
raise error.Abort(_('no arguments allowed with --continue'))
goal = 'continue'
elif abort:
if any((outg, revs, freeargs, rules, editplan)):
raise error.Abort(_('no arguments allowed with --abort'))
goal = 'abort'
elif editplan:
if any((outg, revs, freeargs)):
raise error.Abort(_('only --commands argument allowed with '
'--edit-plan'))
goal = 'edit-plan'
else:
if os.path.exists(os.path.join(repo.path, 'histedit-state')):
raise error.Abort(_('history edit already in progress, try '
'--continue or --abort'))
if outg:
if revs:
raise error.Abort(_('no revisions allowed with --outgoing'))
if len(freeargs) > 1:
raise error.Abort(
_('only one repo argument allowed with --outgoing'))
else:
revs.extend(freeargs)
if len(revs) == 0:
defaultrev = destutil.desthistedit(ui, repo)
if defaultrev is not None:
revs.append(defaultrev)
if len(revs) != 1:
raise error.Abort(
_('histedit requires exactly one ancestor revision'))
replacements = []
state.keep = opts.get('keep', False)
supportsmarkers = obsolete.isenabled(repo, obsolete.createmarkersopt)
# rebuild state
if goal == 'continue':
state.read()
state = bootstrapcontinue(ui, state, opts)
elif goal == 'edit-plan':
state.read()
if not rules:
comment = editcomment % (node.short(state.parentctxnode),
node.short(state.topmost))
rules = ruleeditor(repo, ui, state.actions, comment)
else:
if rules == '-':
f = sys.stdin
else:
f = open(rules)
rules = f.read()
f.close()
actions = parserules(rules, state)
ctxs = [repo[act.nodetoverify()] \
for act in state.actions if act.nodetoverify()]
verifyactions(actions, state, ctxs)
state.actions = actions
state.write()
return
elif goal == 'abort':
try:
state.read()
tmpnodes, leafs = newnodestoabort(state)
ui.debug('restore wc to old parent %s\n'
% node.short(state.topmost))
# Recover our old commits if necessary
if not state.topmost in repo and state.backupfile:
backupfile = repo.join(state.backupfile)
f = hg.openpath(ui, backupfile)
gen = exchange.readbundle(ui, f, backupfile)
tr = repo.transaction('histedit.abort')
try:
if not isinstance(gen, bundle2.unbundle20):
gen.apply(repo, 'histedit', 'bundle:' + backupfile)
if isinstance(gen, bundle2.unbundle20):
bundle2.applybundle(repo, gen, tr,
source='histedit',
url='bundle:' + backupfile)
tr.close()
finally:
tr.release()
os.remove(backupfile)
# check whether we should update away
if repo.unfiltered().revs('parents() and (%n or %ln::)',
state.parentctxnode, leafs | tmpnodes):
hg.clean(repo, state.topmost)
cleanupnode(ui, repo, 'created', tmpnodes)
cleanupnode(ui, repo, 'temp', leafs)
except Exception:
if state.inprogress():
ui.warn(_('warning: encountered an exception during histedit '
'--abort; the repository may not have been completely '
'cleaned up\n'))
raise
finally:
state.clear()
return
else:
cmdutil.checkunfinished(repo)
cmdutil.bailifchanged(repo)
if repo.vfs.exists('histedit-last-edit.txt'):
repo.vfs.unlink('histedit-last-edit.txt')
topmost, empty = repo.dirstate.parents()
if outg:
if freeargs:
remote = freeargs[0]
else:
remote = None
root = findoutgoing(ui, repo, remote, force, opts)
else:
rr = list(repo.set('roots(%ld)', scmutil.revrange(repo, revs)))
if len(rr) != 1:
raise error.Abort(_('The specified revisions must have '
'exactly one common root'))
root = rr[0].node()
revs = between(repo, root, topmost, state.keep)
if not revs:
raise error.Abort(_('%s is not an ancestor of working directory') %
node.short(root))
ctxs = [repo[r] for r in revs]
if not rules:
comment = editcomment % (node.short(root), node.short(topmost))
actions = [pick(state, r) for r in revs]
rules = ruleeditor(repo, ui, actions, comment)
else:
if rules == '-':
f = sys.stdin
else:
f = open(rules)
rules = f.read()
f.close()
actions = parserules(rules, state)
verifyactions(actions, state, ctxs)
parentctxnode = repo[root].parents()[0].node()
state.parentctxnode = parentctxnode
state.actions = actions
state.topmost = topmost
state.replacements = replacements
# Create a backup so we can always abort completely.
backupfile = None
if not obsolete.isenabled(repo, obsolete.createmarkersopt):
backupfile = repair._bundle(repo, [parentctxnode], [topmost], root,
'histedit')
state.backupfile = backupfile
# preprocess rules so that we can hide inner folds from the user
# and only show one editor
actions = state.actions[:]
for idx, (action, nextact) in enumerate(
zip(actions, actions[1:] + [None])):
if action.verb == 'fold' and nextact and nextact.verb == 'fold':
state.actions[idx].__class__ = _multifold
while state.actions:
state.write()
actobj = state.actions.pop(0)
ui.debug('histedit: processing %s %s\n' % (actobj.verb,\
actobj.torule()))
parentctx, replacement_ = actobj.run()
state.parentctxnode = parentctx.node()
state.replacements.extend(replacement_)
state.write()
hg.update(repo, state.parentctxnode)
mapping, tmpnodes, created, ntm = processreplacement(state)
if mapping:
for prec, succs in mapping.iteritems():
if not succs:
ui.debug('histedit: %s is dropped\n' % node.short(prec))
else:
ui.debug('histedit: %s is replaced by %s\n' % (
node.short(prec), node.short(succs[0])))
if len(succs) > 1:
m = 'histedit: %s'
for n in succs[1:]:
ui.debug(m % node.short(n))
if supportsmarkers:
# Only create markers if the temp nodes weren't already removed.
obsolete.createmarkers(repo, ((repo[t],()) for t in sorted(tmpnodes)
if t in repo))
else:
cleanupnode(ui, repo, 'temp', tmpnodes)
if not state.keep:
if mapping:
movebookmarks(ui, repo, mapping, state.topmost, ntm)
# TODO update mq state
if supportsmarkers:
markers = []
# sort by revision number because it sound "right"
for prec in sorted(mapping, key=repo.changelog.rev):
succs = mapping[prec]
markers.append((repo[prec],
tuple(repo[s] for s in succs)))
if markers:
obsolete.createmarkers(repo, markers)
else:
cleanupnode(ui, repo, 'replaced', mapping)
state.clear()
if os.path.exists(repo.sjoin('undo')):
os.unlink(repo.sjoin('undo'))
def bootstrapcontinue(ui, state, opts):
repo = state.repo
if state.actions:
actobj = state.actions.pop(0)
if _isdirtywc(repo):
actobj.continuedirty()
if _isdirtywc(repo):
abortdirty()
parentctx, replacements = actobj.continueclean()
state.parentctxnode = parentctx.node()
state.replacements.extend(replacements)
return state
def between(repo, old, new, keep):
"""select and validate the set of revision to edit
When keep is false, the specified set can't have children."""
ctxs = list(repo.set('%n::%n', old, new))
if ctxs and not keep:
if (not obsolete.isenabled(repo, obsolete.allowunstableopt) and
repo.revs('(%ld::) - (%ld)', ctxs, ctxs)):
raise error.Abort(_('cannot edit history that would orphan nodes'))
if repo.revs('(%ld) and merge()', ctxs):
raise error.Abort(_('cannot edit history that contains merges'))
root = ctxs[0] # list is already sorted by repo.set
if not root.mutable():
raise error.Abort(_('cannot edit public changeset: %s') % root,
hint=_('see "hg help phases" for details'))
return [c.node() for c in ctxs]
def ruleeditor(repo, ui, actions, editcomment=""):
"""open an editor to edit rules
rules are in the format [ [act, ctx], ...] like in state.rules
"""
rules = '\n'.join([act.torule() for act in actions])
rules += '\n\n'
rules += editcomment
rules = ui.edit(rules, ui.username(), {'prefix': 'histedit'})
# Save edit rules in .hg/histedit-last-edit.txt in case
# the user needs to ask for help after something
# surprising happens.
f = open(repo.join('histedit-last-edit.txt'), 'w')
f.write(rules)
f.close()
return rules
def parserules(rules, state):
"""Read the histedit rules string and return list of action objects """
rules = [l for l in (r.strip() for r in rules.splitlines())
if l and not l.startswith('#')]
actions = []
for r in rules:
if ' ' not in r:
raise error.Abort(_('malformed line "%s"') % r)
verb, rest = r.split(' ', 1)
if verb not in actiontable:
raise error.Abort(_('unknown action "%s"') % verb)
action = actiontable[verb].fromrule(state, rest)
actions.append(action)
return actions
def verifyactions(actions, state, ctxs):
"""Verify that there exists exactly one action per given changeset and
other constraints.
Will abort if there are to many or too few rules, a malformed rule,
or a rule on a changeset outside of the user-given range.
"""
expected = set(c.hex() for c in ctxs)
seen = set()
for action in actions:
action.verify()
constraints = action.constraints()
for constraint in constraints:
if constraint not in _constraints.known():
raise error.Abort(_('unknown constraint "%s"') % constraint)
nodetoverify = action.nodetoverify()
if nodetoverify is not None:
ha = node.hex(nodetoverify)
if _constraints.noother in constraints and ha not in expected:
raise error.Abort(
_('may not use "%s" with changesets '
'other than the ones listed') % action.verb)
if _constraints.forceother in constraints and ha in expected:
raise error.Abort(
_('may not use "%s" with changesets '
'within the edited list') % action.verb)
if _constraints.noduplicates in constraints and ha in seen:
raise error.Abort(_('duplicated command for changeset %s') %
ha[:12])
seen.add(ha)
missing = sorted(expected - seen) # sort to stabilize output
if missing:
raise error.Abort(_('missing rules for changeset %s') %
missing[0][:12],
hint=_('use "drop %s" to discard the change') % missing[0][:12])
def newnodestoabort(state):
"""process the list of replacements to return
1) the list of final node
2) the list of temporary node
This meant to be used on abort as less data are required in this case.
"""
replacements = state.replacements
allsuccs = set()
replaced = set()
for rep in replacements:
allsuccs.update(rep[1])
replaced.add(rep[0])
newnodes = allsuccs - replaced
tmpnodes = allsuccs & replaced
return newnodes, tmpnodes
def processreplacement(state):
"""process the list of replacements to return
1) the final mapping between original and created nodes
2) the list of temporary node created by histedit
3) the list of new commit created by histedit"""
replacements = state.replacements
allsuccs = set()
replaced = set()
fullmapping = {}
# initialize basic set
# fullmapping records all operations recorded in replacement
for rep in replacements:
allsuccs.update(rep[1])
replaced.add(rep[0])
fullmapping.setdefault(rep[0], set()).update(rep[1])
new = allsuccs - replaced
tmpnodes = allsuccs & replaced
# Reduce content fullmapping into direct relation between original nodes
# and final node created during history edition
# Dropped changeset are replaced by an empty list
toproceed = set(fullmapping)
final = {}
while toproceed:
for x in list(toproceed):
succs = fullmapping[x]
for s in list(succs):
if s in toproceed:
# non final node with unknown closure
# We can't process this now
break
elif s in final:
# non final node, replace with closure
succs.remove(s)
succs.update(final[s])
else:
final[x] = succs
toproceed.remove(x)
# remove tmpnodes from final mapping
for n in tmpnodes:
del final[n]
# we expect all changes involved in final to exist in the repo
# turn `final` into list (topologically sorted)
nm = state.repo.changelog.nodemap
for prec, succs in final.items():
final[prec] = sorted(succs, key=nm.get)
# computed topmost element (necessary for bookmark)
if new:
newtopmost = sorted(new, key=state.repo.changelog.rev)[-1]
elif not final:
# Nothing rewritten at all. we won't need `newtopmost`
# It is the same as `oldtopmost` and `processreplacement` know it
newtopmost = None
else:
# every body died. The newtopmost is the parent of the root.
r = state.repo.changelog.rev
newtopmost = state.repo[sorted(final, key=r)[0]].p1().node()
return final, tmpnodes, new, newtopmost
def movebookmarks(ui, repo, mapping, oldtopmost, newtopmost):
"""Move bookmark from old to newly created node"""
if not mapping:
# if nothing got rewritten there is not purpose for this function
return
moves = []
for bk, old in sorted(repo._bookmarks.iteritems()):
if old == oldtopmost:
# special case ensure bookmark stay on tip.
#
# This is arguably a feature and we may only want that for the
# active bookmark. But the behavior is kept compatible with the old
# version for now.
moves.append((bk, newtopmost))
continue
base = old
new = mapping.get(base, None)
if new is None:
continue
while not new:
# base is killed, trying with parent
base = repo[base].p1().node()
new = mapping.get(base, (base,))
# nothing to move
moves.append((bk, new[-1]))
if moves:
lock = tr = None
try:
lock = repo.lock()
tr = repo.transaction('histedit')
marks = repo._bookmarks
for mark, new in moves:
old = marks[mark]
ui.note(_('histedit: moving bookmarks %s from %s to %s\n')
% (mark, node.short(old), node.short(new)))
marks[mark] = new
marks.recordchange(tr)
tr.close()
finally:
release(tr, lock)
def cleanupnode(ui, repo, name, nodes):
"""strip a group of nodes from the repository
The set of node to strip may contains unknown nodes."""
ui.debug('should strip %s nodes %s\n' %
(name, ', '.join([node.short(n) for n in nodes])))
lock = None
try:
lock = repo.lock()
# do not let filtering get in the way of the cleanse
# we should probably get rid of obsolescence marker created during the
# histedit, but we currently do not have such information.
repo = repo.unfiltered()
# Find all nodes that need to be stripped
# (we use %lr instead of %ln to silently ignore unknown items)
nm = repo.changelog.nodemap
nodes = sorted(n for n in nodes if n in nm)
roots = [c.node() for c in repo.set("roots(%ln)", nodes)]
for c in roots:
# We should process node in reverse order to strip tip most first.
# but this trigger a bug in changegroup hook.
# This would reduce bundle overhead
repair.strip(ui, repo, c)
finally:
release(lock)
def stripwrapper(orig, ui, repo, nodelist, *args, **kwargs):
if isinstance(nodelist, str):
nodelist = [nodelist]
if os.path.exists(os.path.join(repo.path, 'histedit-state')):
state = histeditstate(repo)
state.read()
histedit_nodes = set([action.nodetoverify() for action
in state.actions if action.nodetoverify()])
strip_nodes = set([repo[n].node() for n in nodelist])
common_nodes = histedit_nodes & strip_nodes
if common_nodes:
raise error.Abort(_("histedit in progress, can't strip %s")
% ', '.join(node.short(x) for x in common_nodes))
return orig(ui, repo, nodelist, *args, **kwargs)
extensions.wrapfunction(repair, 'strip', stripwrapper)
def summaryhook(ui, repo):
if not os.path.exists(repo.join('histedit-state')):
return
state = histeditstate(repo)
state.read()
if state.actions:
# i18n: column positioning for "hg summary"
ui.write(_('hist: %s (histedit --continue)\n') %
(ui.label(_('%d remaining'), 'histedit.remaining') %
len(state.actions)))
def extsetup(ui):
cmdutil.summaryhooks.add('histedit', summaryhook)
cmdutil.unfinishedstates.append(
['histedit-state', False, True, _('histedit in progress'),
_("use 'hg histedit --continue' or 'hg histedit --abort'")])
if ui.configbool("experimental", "histeditng"):
globals()['base'] = addhisteditaction(['base', 'b'])(base)