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| author | Raphaël Gomès <rgomes@octobus.net> |
|---|---|
| date | Tue, 23 Jul 2024 12:10:31 +0200 |
| parents | ca7bde5dbafb |
| children | 454feddab720 |
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# 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 allow edits before making new commit # f, fold = use commit, but combine it with the one above # r, roll = like fold, but discard this commit's description and date # d, drop = remove commit from history # m, mess = edit commit message without changing commit content # b, base = checkout changeset and apply further changesets from there # 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 allow edits before making new commit # f, fold = use commit, but combine it with the one above # r, roll = like fold, but discard this commit's description and date # d, drop = remove commit from history # m, mess = edit commit message without changing commit content # b, base = checkout changeset and apply further changesets from there # 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. The date used for the commit will be the later of the two commits' dates. 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. If there are uncommitted changes, you'll be prompted for a new commit message, but the default commit message will be the original message for the ``edit`` ed revision, and the date of the original commit will be preserved. 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. Config ------ 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 The summary of a change can be customized as well:: [histedit] summary-template = '{rev} {bookmarks} {desc|firstline}' The customized summary should be kept short enough that rule lines will fit in the configured line length. See above if that requires customization. ``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() By default each edited revision needs to be present in histedit commands. To remove revision you need to use ``drop`` operation. You can configure the drop to be implicit for missing commits by adding:: [histedit] dropmissing = True By default, histedit will close the transaction after each action. For performance purposes, you can configure histedit to use a single transaction across the entire histedit. WARNING: This setting introduces a significant risk of losing the work you've done in a histedit if the histedit aborts unexpectedly:: [histedit] singletransaction = True """ # chistedit dependencies that are not available everywhere try: import fcntl import termios except ImportError: fcntl = None termios = None import binascii import functools import os import pickle import struct from mercurial.i18n import _ from mercurial.pycompat import ( open, ) from mercurial.node import ( bin, hex, short, ) from mercurial import ( bundle2, cmdutil, context, copies, destutil, discovery, encoding, error, exchange, extensions, hg, logcmdutil, merge as mergemod, mergestate as mergestatemod, mergeutil, obsolete, pycompat, registrar, repair, rewriteutil, scmutil, state as statemod, util, ) from mercurial.utils import ( dateutil, stringutil, urlutil, ) cmdtable = {} command = registrar.command(cmdtable) configtable = {} configitem = registrar.configitem(configtable) configitem( b'experimental', b'histedit.autoverb', default=False, ) configitem( b'histedit', b'defaultrev', default=None, ) configitem( b'histedit', b'dropmissing', default=False, ) configitem( b'histedit', b'linelen', default=80, ) configitem( b'histedit', b'singletransaction', default=False, ) configitem( b'ui', b'interface.histedit', default=None, ) configitem(b'histedit', b'summary-template', default=b'{rev} {desc|firstline}') # TODO: Teach the text-based histedit interface to respect this config option # before we make it non-experimental. configitem( b'histedit', b'later-commits-first', default=False, experimental=True ) # 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' actiontable = {} primaryactions = set() secondaryactions = set() tertiaryactions = set() internalactions = set() def geteditcomment(ui, first, last): """construct the editor comment The comment includes:: - an intro - sorted primary commands - sorted short commands - sorted long commands - additional hints Commands are only included once. """ intro = _( b"""Edit history between %s and %s Commits are listed from least to most recent You can reorder changesets by reordering the lines Commands: """ ) actions = [] def addverb(v): a = actiontable[v] lines = a.message.split(b"\n") if len(a.verbs): v = b', '.join(sorted(a.verbs, key=lambda v: len(v))) actions.append(b" %s = %s" % (v, lines[0])) actions.extend([b' %s'] * (len(lines) - 1)) for v in ( sorted(primaryactions) + sorted(secondaryactions) + sorted(tertiaryactions) ): addverb(v) actions.append(b'') hints = [] if ui.configbool(b'histedit', b'dropmissing'): hints.append( b"Deleting a changeset from the list " b"will DISCARD it from the edited history!" ) lines = (intro % (first, last)).split(b'\n') + actions + hints return b''.join([b'# %s\n' % l if l else b'#\n' for l in lines]) class histeditstate: def __init__(self, repo): self.repo = repo self.actions = None self.keep = None self.topmost = None self.parentctxnode = None self.lock = None self.wlock = None self.backupfile = None self.stateobj = statemod.cmdstate(repo, b'histedit-state') self.replacements = [] def read(self): """Load histedit state from disk and set fields appropriately.""" if not self.stateobj.exists(): cmdutil.wrongtooltocontinue(self.repo, _(b'histedit')) data = self._read() self.parentctxnode = data[b'parentctxnode'] actions = parserules(data[b'rules'], self) self.actions = actions self.keep = data[b'keep'] self.topmost = data[b'topmost'] self.replacements = data[b'replacements'] self.backupfile = data[b'backupfile'] def _read(self): fp = self.repo.vfs.read(b'histedit-state') if fp.startswith(b'v1\n'): data = self._load() parentctxnode, rules, keep, topmost, replacements, backupfile = data else: data = pickle.loads(fp) parentctxnode, rules, keep, topmost, replacements = data backupfile = None rules = b"\n".join([b"%s %s" % (verb, rest) for [verb, rest] in rules]) return { b'parentctxnode': parentctxnode, b"rules": rules, b"keep": keep, b"topmost": topmost, b"replacements": replacements, b"backupfile": backupfile, } def write(self, tr=None): if tr: tr.addfilegenerator( b'histedit-state', (b'histedit-state',), self._write, location=b'plain', ) else: with self.repo.vfs(b"histedit-state", b"w") as f: self._write(f) def _write(self, fp): fp.write(b'v1\n') fp.write(b'%s\n' % hex(self.parentctxnode)) fp.write(b'%s\n' % hex(self.topmost)) fp.write(b'%s\n' % (b'True' if self.keep else b'False')) fp.write(b'%d\n' % len(self.actions)) for action in self.actions: fp.write(b'%s\n' % action.tostate()) fp.write(b'%d\n' % len(self.replacements)) for replacement in self.replacements: fp.write( b'%s%s\n' % ( hex(replacement[0]), b''.join(hex(r) for r in replacement[1]), ) ) backupfile = self.backupfile if not backupfile: backupfile = b'' fp.write(b'%s\n' % backupfile) def _load(self): fp = self.repo.vfs(b'histedit-state', b'r') lines = [l[:-1] for l in fp.readlines()] index = 0 lines[index] # version number index += 1 parentctxnode = bin(lines[index]) index += 1 topmost = bin(lines[index]) index += 1 keep = lines[index] == b'True' index += 1 # Rules rules = [] rulelen = int(lines[index]) index += 1 for i in range(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 range(replacementlen): replacement = lines[index] original = bin(replacement[:40]) succ = [ 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(b'histedit-state') def inprogress(self): return self.repo.vfs.exists(b'histedit-state') class histeditaction: 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.""" ruleid = rule.strip().split(b' ', 1)[0] # ruleid can be anything from rev numbers, hashes, "bookmarks" etc # Check for validation of rule ids and get the rulehash try: rev = bin(ruleid) except binascii.Error: try: _ctx = scmutil.revsingle(state.repo, ruleid) rulehash = _ctx.hex() rev = bin(rulehash) except error.RepoLookupError: raise error.ParseError(_(b"invalid changeset %s") % ruleid) return cls(state, rev) def verify(self, prev, expected, seen): """Verifies semantic correctness of the rule""" repo = self.repo ha = hex(self.node) self.node = scmutil.resolvehexnodeidprefix(repo, ha) if self.node is None: raise error.ParseError(_(b'unknown changeset %s listed') % ha[:12]) self._verifynodeconstraints(prev, expected, seen) def _verifynodeconstraints(self, prev, expected, seen): # by default command need a node in the edited list if self.node not in expected: raise error.ParseError( _(b'%s "%s" changeset was not a candidate') % (self.verb, short(self.node)), hint=_(b'only use listed changesets'), ) # and only one command per node if self.node in seen: raise error.ParseError( _(b'duplicated command for changeset %s') % short(self.node) ) 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] ui = self.repo.ui # 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'histedit' ): summary = cmdutil.rendertemplate( ctx, ui.config(b'histedit', b'summary-template') ) line = b'%s %s %s' % (self.verb, ctx, stringutil.firstline(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(b'histedit', b'linelen') maxlen = max(maxlen, 22) # avoid truncating hash return stringutil.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 b"%s\n%s" % (self.verb, hex(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] with repo.ui.silent(): hg.update(repo, self.state.parentctxnode, quietempty=True) stats = applychanges(repo.ui, repo, rulectx, {}) repo.dirstate.setbranch(rulectx.branch(), repo.currenttransaction()) if stats.unresolvedcount: raise error.InterventionRequired( _(b'Fix up the change (%s %s)') % (self.verb, short(self.node)), hint=_(b'hg histedit --continue to resume'), ) 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) if repo.ui.configbool(b'rewrite', b'update-timestamp'): date = dateutil.makedate() else: date = rulectx.date() commit( text=rulectx.description(), user=rulectx.user(), date=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[b'.'] if ctx.node() == self.state.parentctxnode: self.repo.ui.warn( _(b'%s: skipping changeset (no changes)\n') % 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): overrides = {(b'phases', b'new-commit'): phasemin} with repo.ui.configoverride(overrides, b'histedit'): extra = kwargs.get('extra', {}).copy() extra[b'histedit_source'] = src.hex() kwargs['extra'] = extra return repo.commit(**kwargs) return commitfunc def applychanges(ui, repo, ctx, opts): """Merge changeset from ctx (only) in the current working directory""" if ctx.p1().node() == repo.dirstate.p1(): # edits are "in place" we do not need to make any merge, # just applies changes on parent for editing with ui.silent(): cmdutil.revert(ui, repo, ctx, all=True) stats = mergemod.updateresult(0, 0, 0, 0) else: try: # ui.forcemerge is an internal variable, do not document repo.ui.setconfig( b'ui', b'forcemerge', opts.get(b'tool', b''), b'histedit' ) stats = mergemod.graft( repo, ctx, labels=[ b'already edited', b'current change', b'parent of current change', ], ) finally: repo.ui.setconfig(b'ui', b'forcemerge', b'', b'histedit') return stats def collapse(repo, firstctx, lastctx, 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(b'%d::%d', firstctx.rev(), lastctx.rev())) if not ctxs: return None for c in ctxs: if not c.mutable(): raise error.ParseError( _(b"cannot fold into public change %s") % short(c.node()) ) base = firstctx.p1() # 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, lastctx) # prune files which were reverted by the updates files = [f for f in files if not cmdutil.samefile(f, lastctx, base)] # commit version of these files as defined by head headmf = lastctx.manifest() def filectxfn(repo, ctx, path): if path in headmf: fctx = lastctx[path] flags = fctx.flags() mctx = context.memfilectx( repo, ctx, fctx.path(), fctx.data(), islink=b'l' in flags, isexec=b'x' in flags, copysource=copied.get(path), ) return mctx return None if commitopts.get(b'message'): message = commitopts[b'message'] else: message = firstctx.description() user = commitopts.get(b'user') date = commitopts.get(b'date') extra = commitopts.get(b'extra') parents = (firstctx.p1().node(), firstctx.p2().node()) editor = None if not skipprompt: editor = cmdutil.getcommiteditor(edit=True, editform=b'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.StateError( _(b'working copy has pending changes'), hint=_( b'amend, commit, or revert them and run histedit ' b'--continue, or abort with histedit --abort' ), ) def action(verbs, message, priority=False, internal=False): def wrap(cls): assert not priority or not internal verb = verbs[0] if priority: primaryactions.add(verb) elif internal: internalactions.add(verb) elif len(verbs) > 1: secondaryactions.add(verb) else: tertiaryactions.add(verb) cls.verb = verb cls.verbs = verbs cls.message = message for verb in verbs: actiontable[verb] = cls return cls return wrap @action([b'pick', b'p'], _(b'use commit'), priority=True) class pick(histeditaction): def run(self): rulectx = self.repo[self.node] if rulectx.p1().node() == self.state.parentctxnode: self.repo.ui.debug(b'node %s unchanged\n' % short(self.node)) return rulectx, [] return super(pick, self).run() @action( [b'edit', b'e'], _(b'use commit, but allow edits before making new commit'), priority=True, ) class edit(histeditaction): def run(self): repo = self.repo rulectx = repo[self.node] hg.update(repo, self.state.parentctxnode, quietempty=True) applychanges(repo.ui, repo, rulectx, {}) hint = _(b'to edit %s, `hg histedit --continue` after making changes') raise error.InterventionRequired( _(b'Editing (%s), commit as needed now to split the change') % short(self.node), hint=hint % short(self.node), ) def commiteditor(self): return cmdutil.getcommiteditor(edit=True, editform=b'histedit.edit') @action([b'fold', b'f'], _(b'use commit, but combine it with the one above')) class fold(histeditaction): def verify(self, prev, expected, seen): """Verifies semantic correctness of the fold rule""" super(fold, self).verify(prev, expected, seen) repo = self.repo if not prev: c = repo[self.node].p1() elif not prev.verb in (b'pick', b'base'): return else: c = repo[prev.node] if not c.mutable(): raise error.ParseError( _(b"cannot fold into public change %s") % short(c.node()) ) def continuedirty(self): repo = self.repo rulectx = repo[self.node] commit = commitfuncfor(repo, rulectx) commit( text=b'fold-temp-revision %s' % short(self.node), user=rulectx.user(), date=rulectx.date(), extra=rulectx.extra(), ) def continueclean(self): repo = self.repo ctx = repo[b'.'] rulectx = repo[self.node] parentctxnode = self.state.parentctxnode if ctx.node() == parentctxnode: repo.ui.warn(_(b'%s: empty changeset\n') % short(self.node)) return ctx, [(self.node, (parentctxnode,))] parentctx = repo[parentctxnode] newcommits = { c.node() for c in repo.set(b'(%d::. - %d)', parentctx.rev(), parentctx.rev()) } if not newcommits: repo.ui.warn( _( b'%s: cannot fold - working copy is not a ' b'descendant of previous commit %s\n' ) % (short(self.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 firstdate(self): """Returns true if the rule should preserve the date of the first change. This exists mainly so that 'rollup' rules can be a subclass of 'fold'. """ return False def finishfold(self, ui, repo, ctx, oldctx, newnode, internalchanges): mergemod.update(ctx.p1()) ### prepare new commit data commitopts = {} commitopts[b'user'] = ctx.user() # commit message if not self.mergedescs(): newmessage = ctx.description() else: newmessage = ( b'\n***\n'.join( [ctx.description()] + [repo[r].description() for r in internalchanges] + [oldctx.description()] ) + b'\n' ) commitopts[b'message'] = newmessage # date if self.firstdate(): commitopts[b'date'] = ctx.date() else: commitopts[b'date'] = max(ctx.date(), oldctx.date()) # if date is to be updated to current if ui.configbool(b'rewrite', b'update-timestamp'): commitopts[b'date'] = dateutil.makedate() 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[b'histedit_source'] = b'%s,%s' % (ctx.hex(), oldctx.hex()) commitopts[b'extra'] = extra phasemin = max(ctx.phase(), oldctx.phase()) overrides = {(b'phases', b'new-commit'): phasemin} with repo.ui.configoverride(overrides, b'histedit'): n = collapse( repo, ctx, repo[newnode], commitopts, skipprompt=self.skipprompt(), ) if n is None: return ctx, [] mergemod.update(repo[n]) replacements = [ (oldctx.node(), (newnode,)), (ctx.node(), (n,)), (newnode, (n,)), ] for ich in internalchanges: replacements.append((ich, (n,))) return repo[n], replacements @action( [b'base', b'b'], _(b'checkout changeset and apply further changesets from there'), ) class base(histeditaction): def run(self): if self.repo[b'.'].node() != self.node: mergemod.clean_update(self.repo[self.node]) return self.continueclean() def continuedirty(self): abortdirty() def continueclean(self): basectx = self.repo[b'.'] return basectx, [] def _verifynodeconstraints(self, prev, expected, seen): # base can only be use with a node not in the edited set if self.node in expected: msg = _(b'%s "%s" changeset was an edited list candidate') raise error.ParseError( msg % (self.verb, short(self.node)), hint=_(b'base must only use unlisted changesets'), ) @action( [b'_multifold'], _( b"""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. """ ), internal=True, ) class _multifold(fold): def skipprompt(self): return True @action( [b"roll", b"r"], _(b"like fold, but discard this commit's description and date"), ) class rollup(fold): def mergedescs(self): return False def skipprompt(self): return True def firstdate(self): return True @action([b"drop", b"d"], _(b'remove commit from history')) class drop(histeditaction): def run(self): parentctx = self.repo[self.state.parentctxnode] return parentctx, [(self.node, tuple())] @action( [b"mess", b"m"], _(b'edit commit message without changing commit content'), priority=True, ) class message(histeditaction): def commiteditor(self): return cmdutil.getcommiteditor(edit=True, editform=b'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 = {} path = urlutil.get_unique_push_path(b'histedit', repo, ui, remote) ui.status(_(b'comparing with %s\n') % urlutil.hidepassword(path.loc)) revs, checkout = hg.addbranchrevs(repo, repo, (path.branch, []), None) other = hg.peer(repo, opts, path) if revs: revs = [repo.lookup(rev) for rev in revs] outgoing = discovery.findcommonoutgoing(repo, other, revs, force=force) if not outgoing.missing: raise error.StateError(_(b'no outgoing ancestors')) roots = list(repo.revs(b"roots(%ln)", outgoing.missing)) if len(roots) > 1: msg = _(b'there are ambiguous outgoing revisions') hint = _(b"see 'hg help histedit' for more detail") raise error.StateError(msg, hint=hint) return repo[roots[0]].node() # Curses Support try: import curses except ImportError: curses = None KEY_LIST = [b'pick', b'edit', b'fold', b'drop', b'mess', b'roll'] ACTION_LABELS = { b'fold': b'^fold', b'roll': b'^roll', } COLOR_HELP, COLOR_SELECTED, COLOR_OK, COLOR_WARN, COLOR_CURRENT = 1, 2, 3, 4, 5 COLOR_DIFF_ADD_LINE, COLOR_DIFF_DEL_LINE, COLOR_DIFF_OFFSET = 6, 7, 8 COLOR_ROLL, COLOR_ROLL_CURRENT, COLOR_ROLL_SELECTED = 9, 10, 11 E_QUIT, E_HISTEDIT = 1, 2 E_PAGEDOWN, E_PAGEUP, E_LINEUP, E_LINEDOWN, E_RESIZE = 3, 4, 5, 6, 7 MODE_INIT, MODE_PATCH, MODE_RULES, MODE_HELP = 0, 1, 2, 3 KEYTABLE = { b'global': { b'h': b'next-action', b'KEY_RIGHT': b'next-action', b'l': b'prev-action', b'KEY_LEFT': b'prev-action', b'q': b'quit', b'c': b'histedit', b'C': b'histedit', b'v': b'showpatch', b'?': b'help', }, MODE_RULES: { b'd': b'action-drop', b'e': b'action-edit', b'f': b'action-fold', b'm': b'action-mess', b'p': b'action-pick', b'r': b'action-roll', b' ': b'select', b'j': b'down', b'k': b'up', b'KEY_DOWN': b'down', b'KEY_UP': b'up', b'J': b'move-down', b'K': b'move-up', b'KEY_NPAGE': b'move-down', b'KEY_PPAGE': b'move-up', b'0': b'goto', # Used for 0..9 }, MODE_PATCH: { b' ': b'page-down', b'KEY_NPAGE': b'page-down', b'KEY_PPAGE': b'page-up', b'j': b'line-down', b'k': b'line-up', b'KEY_DOWN': b'line-down', b'KEY_UP': b'line-up', b'J': b'down', b'K': b'up', }, MODE_HELP: {}, } def screen_size(): return struct.unpack(b'hh', fcntl.ioctl(1, termios.TIOCGWINSZ, b' ')) class histeditrule: def __init__(self, ui, ctx, pos, action=b'pick'): self.ui = ui self.ctx = ctx self.action = action self.origpos = pos self.pos = pos self.conflicts = [] def __bytes__(self): # Example display of several histeditrules: # # #10 pick 316392:06a16c25c053 add option to skip tests # #11 ^roll 316393:71313c964cc5 <RED>oops a fixup commit</RED> # #12 pick 316394:ab31f3973b0d include mfbt for mozilla-config.h # #13 ^fold 316395:14ce5803f4c3 fix warnings # # The carets point to the changeset being folded into ("roll this # changeset into the changeset above"). return b'%s%s' % (self.prefix, self.desc) __str__ = encoding.strmethod(__bytes__) @property def prefix(self): # Some actions ('fold' and 'roll') combine a patch with a # previous one. Add a marker showing which patch they apply # to. action = ACTION_LABELS.get(self.action, self.action) h = self.ctx.hex()[0:12] r = self.ctx.rev() return b"#%s %s %d:%s " % ( (b'%d' % self.origpos).ljust(2), action.ljust(6), r, h, ) @util.propertycache def desc(self): summary = cmdutil.rendertemplate( self.ctx, self.ui.config(b'histedit', b'summary-template') ) if summary: return summary # This is split off from the prefix property so that we can # separately make the description for 'roll' red (since it # will get discarded). return stringutil.firstline(self.ctx.description()) def checkconflicts(self, other): if other.pos > self.pos and other.origpos <= self.origpos: if set(other.ctx.files()) & set(self.ctx.files()) != set(): self.conflicts.append(other) return self.conflicts if other in self.conflicts: self.conflicts.remove(other) return self.conflicts def makecommands(rules): """Returns a list of commands consumable by histedit --commands based on our list of rules""" commands = [] for rules in rules: commands.append(b'%s %s\n' % (rules.action, rules.ctx)) return commands def addln(win, y, x, line, color=None): """Add a line to the given window left padding but 100% filled with whitespace characters, so that the color appears on the whole line""" maxy, maxx = win.getmaxyx() length = maxx - 1 - x line = bytes(line).ljust(length)[:length] if y < 0: y = maxy + y if x < 0: x = maxx + x if color: win.addstr(y, x, line, color) else: win.addstr(y, x, line) def _trunc_head(line, n): if len(line) <= n: return line return b'> ' + line[-(n - 2) :] def _trunc_tail(line, n): if len(line) <= n: return line return line[: n - 2] + b' >' class _chistedit_state: def __init__( self, repo, rules, stdscr, ): self.repo = repo self.rules = rules self.stdscr = stdscr self.later_on_top = repo.ui.configbool( b'histedit', b'later-commits-first' ) # The current item in display order, initialized to point to the top # of the screen. self.pos = 0 self.selected = None self.mode = (MODE_INIT, MODE_INIT) self.page_height = None self.modes = { MODE_RULES: { b'line_offset': 0, }, MODE_PATCH: { b'line_offset': 0, }, } def render_commit(self, win): """Renders the commit window that shows the log of the current selected commit""" rule = self.rules[self.display_pos_to_rule_pos(self.pos)] ctx = rule.ctx win.box() maxy, maxx = win.getmaxyx() length = maxx - 3 line = b"changeset: %d:%s" % (ctx.rev(), ctx.hex()[:12]) win.addstr(1, 1, line[:length]) line = b"user: %s" % ctx.user() win.addstr(2, 1, line[:length]) bms = self.repo.nodebookmarks(ctx.node()) line = b"bookmark: %s" % b' '.join(bms) win.addstr(3, 1, line[:length]) line = b"summary: %s" % stringutil.firstline(ctx.description()) win.addstr(4, 1, line[:length]) line = b"files: " win.addstr(5, 1, line) fnx = 1 + len(line) fnmaxx = length - fnx + 1 y = 5 fnmaxn = maxy - (1 + y) - 1 files = ctx.files() for i, line1 in enumerate(files): if len(files) > fnmaxn and i == fnmaxn - 1: win.addstr(y, fnx, _trunc_tail(b','.join(files[i:]), fnmaxx)) y = y + 1 break win.addstr(y, fnx, _trunc_head(line1, fnmaxx)) y = y + 1 conflicts = rule.conflicts if len(conflicts) > 0: conflictstr = b','.join(map(lambda r: r.ctx.hex()[:12], conflicts)) conflictstr = b"changed files overlap with %s" % conflictstr else: conflictstr = b'no overlap' win.addstr(y, 1, conflictstr[:length]) win.noutrefresh() def helplines(self): if self.mode[0] == MODE_PATCH: help = b"""\ ?: help, k/up: line up, j/down: line down, v: stop viewing patch pgup: prev page, space/pgdn: next page, c: commit, q: abort """ else: help = b"""\ ?: help, k/up: move up, j/down: move down, space: select, v: view patch d: drop, e: edit, f: fold, m: mess, p: pick, r: roll pgup/K: move patch up, pgdn/J: move patch down, c: commit, q: abort """ if self.later_on_top: help += b"Newer commits are shown above older commits.\n" else: help += b"Older commits are shown above newer commits.\n" return help.splitlines() def render_help(self, win): maxy, maxx = win.getmaxyx() for y, line in enumerate(self.helplines()): if y >= maxy: break addln(win, y, 0, line, curses.color_pair(COLOR_HELP)) win.noutrefresh() def layout(self): maxy, maxx = self.stdscr.getmaxyx() helplen = len(self.helplines()) mainlen = maxy - helplen - 12 if mainlen < 1: raise error.Abort( _(b"terminal dimensions %d by %d too small for curses histedit") % (maxy, maxx), hint=_( b"enlarge your terminal or use --config ui.interface=text" ), ) return { b'commit': (12, maxx), b'help': (helplen, maxx), b'main': (mainlen, maxx), } def display_pos_to_rule_pos(self, display_pos): """Converts a position in display order to rule order. The `display_pos` is the order from the top in display order, not considering which items are currently visible on the screen. Thus, `display_pos=0` is the item at the top (possibly after scrolling to the top) """ if self.later_on_top: return len(self.rules) - 1 - display_pos else: return display_pos def render_rules(self, rulesscr): start = self.modes[MODE_RULES][b'line_offset'] conflicts = [r.ctx for r in self.rules if r.conflicts] if len(conflicts) > 0: line = b"potential conflict in %s" % b','.join( map(pycompat.bytestr, conflicts) ) addln(rulesscr, -1, 0, line, curses.color_pair(COLOR_WARN)) for display_pos in range(start, len(self.rules)): y = display_pos - start if y < 0 or y >= self.page_height: continue rule_pos = self.display_pos_to_rule_pos(display_pos) rule = self.rules[rule_pos] if len(rule.conflicts) > 0: rulesscr.addstr(y, 0, b" ", curses.color_pair(COLOR_WARN)) else: rulesscr.addstr(y, 0, b" ", curses.COLOR_BLACK) if display_pos == self.selected: rollcolor = COLOR_ROLL_SELECTED addln(rulesscr, y, 2, rule, curses.color_pair(COLOR_SELECTED)) elif display_pos == self.pos: rollcolor = COLOR_ROLL_CURRENT addln( rulesscr, y, 2, rule, curses.color_pair(COLOR_CURRENT) | curses.A_BOLD, ) else: rollcolor = COLOR_ROLL addln(rulesscr, y, 2, rule) if rule.action == b'roll': rulesscr.addstr( y, 2 + len(rule.prefix), rule.desc, curses.color_pair(rollcolor), ) rulesscr.noutrefresh() def render_string(self, win, output, diffcolors=False): maxy, maxx = win.getmaxyx() length = min(maxy - 1, len(output)) for y in range(0, length): line = output[y] if diffcolors: if line.startswith(b'+'): win.addstr( y, 0, line, curses.color_pair(COLOR_DIFF_ADD_LINE) ) elif line.startswith(b'-'): win.addstr( y, 0, line, curses.color_pair(COLOR_DIFF_DEL_LINE) ) elif line.startswith(b'@@ '): win.addstr(y, 0, line, curses.color_pair(COLOR_DIFF_OFFSET)) else: win.addstr(y, 0, line) else: win.addstr(y, 0, line) win.noutrefresh() def render_patch(self, win): start = self.modes[MODE_PATCH][b'line_offset'] content = self.modes[MODE_PATCH][b'patchcontents'] self.render_string(win, content[start:], diffcolors=True) def event(self, ch): """Change state based on the current character input This takes the current state and based on the current character input from the user we change the state. """ oldpos = self.pos if ch in (curses.KEY_RESIZE, b"KEY_RESIZE"): return E_RESIZE lookup_ch = ch if ch is not None and b'0' <= ch <= b'9': lookup_ch = b'0' curmode, prevmode = self.mode action = KEYTABLE[curmode].get( lookup_ch, KEYTABLE[b'global'].get(lookup_ch) ) if action is None: return if action in (b'down', b'move-down'): newpos = min(oldpos + 1, len(self.rules) - 1) self.move_cursor(oldpos, newpos) if self.selected is not None or action == b'move-down': self.swap(oldpos, newpos) elif action in (b'up', b'move-up'): newpos = max(0, oldpos - 1) self.move_cursor(oldpos, newpos) if self.selected is not None or action == b'move-up': self.swap(oldpos, newpos) elif action == b'next-action': self.cycle_action(oldpos, next=True) elif action == b'prev-action': self.cycle_action(oldpos, next=False) elif action == b'select': self.selected = oldpos if self.selected is None else None self.make_selection(self.selected) elif action == b'goto' and int(ch) < len(self.rules) <= 10: newrule = next((r for r in self.rules if r.origpos == int(ch))) self.move_cursor(oldpos, newrule.pos) if self.selected is not None: self.swap(oldpos, newrule.pos) elif action.startswith(b'action-'): self.change_action(oldpos, action[7:]) elif action == b'showpatch': self.change_mode(MODE_PATCH if curmode != MODE_PATCH else prevmode) elif action == b'help': self.change_mode(MODE_HELP if curmode != MODE_HELP else prevmode) elif action == b'quit': return E_QUIT elif action == b'histedit': return E_HISTEDIT elif action == b'page-down': return E_PAGEDOWN elif action == b'page-up': return E_PAGEUP elif action == b'line-down': return E_LINEDOWN elif action == b'line-up': return E_LINEUP def patch_contents(self): repo = self.repo rule = self.rules[self.display_pos_to_rule_pos(self.pos)] displayer = logcmdutil.changesetdisplayer( repo.ui, repo, {b"patch": True, b"template": b"status"}, buffered=True, ) overrides = {(b'ui', b'verbose'): True} with repo.ui.configoverride(overrides, source=b'histedit'): displayer.show(rule.ctx) displayer.close() return displayer.hunk[rule.ctx.rev()].splitlines() def move_cursor(self, oldpos, newpos): """Change the rule/changeset that the cursor is pointing to, regardless of current mode (you can switch between patches from the view patch window). """ self.pos = newpos mode, _ = self.mode if mode == MODE_RULES: # Scroll through the list by updating the view for MODE_RULES, so that # even if we are not currently viewing the rules, switching back will # result in the cursor's rule being visible. modestate = self.modes[MODE_RULES] if newpos < modestate[b'line_offset']: modestate[b'line_offset'] = newpos elif newpos > modestate[b'line_offset'] + self.page_height - 1: modestate[b'line_offset'] = newpos - self.page_height + 1 # Reset the patch view region to the top of the new patch. self.modes[MODE_PATCH][b'line_offset'] = 0 def change_mode(self, mode): curmode, _ = self.mode self.mode = (mode, curmode) if mode == MODE_PATCH: self.modes[MODE_PATCH][b'patchcontents'] = self.patch_contents() def make_selection(self, pos): self.selected = pos def swap(self, oldpos, newpos): """Swap two positions and calculate necessary conflicts in O(|newpos-oldpos|) time""" old_rule_pos = self.display_pos_to_rule_pos(oldpos) new_rule_pos = self.display_pos_to_rule_pos(newpos) rules = self.rules assert 0 <= old_rule_pos < len(rules) and 0 <= new_rule_pos < len(rules) rules[old_rule_pos], rules[new_rule_pos] = ( rules[new_rule_pos], rules[old_rule_pos], ) # TODO: swap should not know about histeditrule's internals rules[new_rule_pos].pos = new_rule_pos rules[old_rule_pos].pos = old_rule_pos start = min(old_rule_pos, new_rule_pos) end = max(old_rule_pos, new_rule_pos) for r in range(start, end + 1): rules[new_rule_pos].checkconflicts(rules[r]) rules[old_rule_pos].checkconflicts(rules[r]) if self.selected: self.make_selection(newpos) def change_action(self, pos, action): """Change the action state on the given position to the new action""" rule_pos = self.display_pos_to_rule_pos(pos) assert 0 <= rule_pos < len(self.rules) self.rules[rule_pos].action = action def cycle_action(self, pos, next=False): """Changes the action state the next or the previous action from the action list""" rule_pos = self.display_pos_to_rule_pos(pos) assert 0 <= rule_pos < len(self.rules) current = self.rules[rule_pos].action assert current in KEY_LIST index = KEY_LIST.index(current) if next: index += 1 else: index -= 1 # using pos instead of rule_pos because change_action() also calls # display_pos_to_rule_pos() self.change_action(pos, KEY_LIST[index % len(KEY_LIST)]) def change_view(self, delta, unit): """Change the region of whatever is being viewed (a patch or the list of changesets). 'delta' is an amount (+/- 1) and 'unit' is 'page' or 'line'. """ mode, _ = self.mode if mode != MODE_PATCH: return mode_state = self.modes[mode] num_lines = len(mode_state[b'patchcontents']) page_height = self.page_height unit = page_height if unit == b'page' else 1 num_pages = 1 + (num_lines - 1) // page_height max_offset = (num_pages - 1) * page_height newline = mode_state[b'line_offset'] + delta * unit mode_state[b'line_offset'] = max(0, min(max_offset, newline)) def _chisteditmain(repo, rules, stdscr): try: curses.use_default_colors() except curses.error: pass # initialize color pattern curses.init_pair(COLOR_HELP, curses.COLOR_WHITE, curses.COLOR_BLUE) curses.init_pair(COLOR_SELECTED, curses.COLOR_BLACK, curses.COLOR_WHITE) curses.init_pair(COLOR_WARN, curses.COLOR_BLACK, curses.COLOR_YELLOW) curses.init_pair(COLOR_OK, curses.COLOR_BLACK, curses.COLOR_GREEN) curses.init_pair(COLOR_CURRENT, curses.COLOR_WHITE, curses.COLOR_MAGENTA) curses.init_pair(COLOR_DIFF_ADD_LINE, curses.COLOR_GREEN, -1) curses.init_pair(COLOR_DIFF_DEL_LINE, curses.COLOR_RED, -1) curses.init_pair(COLOR_DIFF_OFFSET, curses.COLOR_MAGENTA, -1) curses.init_pair(COLOR_ROLL, curses.COLOR_RED, -1) curses.init_pair( COLOR_ROLL_CURRENT, curses.COLOR_BLACK, curses.COLOR_MAGENTA ) curses.init_pair(COLOR_ROLL_SELECTED, curses.COLOR_RED, curses.COLOR_WHITE) # don't display the cursor try: curses.curs_set(0) except curses.error: pass def drawvertwin(size, y, x): win = curses.newwin(size[0], size[1], y, x) y += size[0] return win, y, x state = _chistedit_state(repo, rules, stdscr) # eventloop ch = None stdscr.clear() stdscr.refresh() while True: oldmode, unused = state.mode if oldmode == MODE_INIT: state.change_mode(MODE_RULES) e = state.event(ch) if e == E_QUIT: return False if e == E_HISTEDIT: return state.rules else: if e == E_RESIZE: size = screen_size() if size != stdscr.getmaxyx(): curses.resizeterm(*size) sizes = state.layout() curmode, unused = state.mode if curmode != oldmode: state.page_height = sizes[b'main'][0] # Adjust the view to fit the current screen size. state.move_cursor(state.pos, state.pos) # Pack the windows against the top, each pane spread across the # full width of the screen. y, x = (0, 0) helpwin, y, x = drawvertwin(sizes[b'help'], y, x) mainwin, y, x = drawvertwin(sizes[b'main'], y, x) commitwin, y, x = drawvertwin(sizes[b'commit'], y, x) if e in (E_PAGEDOWN, E_PAGEUP, E_LINEDOWN, E_LINEUP): if e == E_PAGEDOWN: state.change_view(+1, b'page') elif e == E_PAGEUP: state.change_view(-1, b'page') elif e == E_LINEDOWN: state.change_view(+1, b'line') elif e == E_LINEUP: state.change_view(-1, b'line') # start rendering commitwin.erase() helpwin.erase() mainwin.erase() if curmode == MODE_PATCH: state.render_patch(mainwin) elif curmode == MODE_HELP: state.render_string(mainwin, __doc__.strip().splitlines()) else: state.render_rules(mainwin) state.render_commit(commitwin) state.render_help(helpwin) curses.doupdate() # done rendering ch = encoding.strtolocal(stdscr.getkey()) def _chistedit(ui, repo, freeargs, opts): """interactively edit changeset history via a curses interface Provides a ncurses interface to histedit. Press ? in chistedit mode to see an extensive help. Requires python-curses to be installed.""" if curses is None: raise error.Abort(_(b"Python curses library required")) # disable color ui._colormode = None try: keep = opts.get(b'keep') revs = opts.get(b'rev', [])[:] cmdutil.checkunfinished(repo) cmdutil.bailifchanged(repo) revs.extend(freeargs) if not revs: defaultrev = destutil.desthistedit(ui, repo) if defaultrev is not None: revs.append(defaultrev) if len(revs) != 1: raise error.InputError( _(b'histedit requires exactly one ancestor revision') ) rr = list(repo.set(b'roots(%ld)', logcmdutil.revrange(repo, revs))) if len(rr) != 1: raise error.InputError( _( b'The specified revisions must have ' b'exactly one common root' ) ) root = rr[0].node() topmost = repo.dirstate.p1() revs = between(repo, root, topmost, keep) if not revs: raise error.InputError( _(b'%s is not an ancestor of working directory') % short(root) ) rules = [] for i, r in enumerate(revs): rules.append(histeditrule(ui, repo[r], i)) with util.with_lc_ctype(): rc = curses.wrapper(functools.partial(_chisteditmain, repo, rules)) if rc is False: ui.write(_(b"histedit aborted\n")) return 0 if type(rc) is list: ui.status(_(b"performing changes\n")) rules = makecommands(rc) with repo.vfs(b'chistedit', b'w+') as fp: for r in rules: fp.write(r) opts[b'commands'] = fp.name return _texthistedit(ui, repo, freeargs, opts) except KeyboardInterrupt: pass return -1 @command( b'histedit', [ ( b'', b'commands', b'', _(b'read history edits from the specified file'), _(b'FILE'), ), (b'c', b'continue', False, _(b'continue an edit already in progress')), (b'', b'edit-plan', False, _(b'edit remaining actions list')), ( b'k', b'keep', False, _(b"don't strip old nodes after edit is complete"), ), (b'', b'abort', False, _(b'abort an edit in progress')), (b'o', b'outgoing', False, _(b'changesets not found in destination')), ( b'f', b'force', False, _(b'force outgoing even for unrelated repositories'), ), (b'r', b'rev', [], _(b'first revision to be edited'), _(b'REV')), ] + cmdutil.formatteropts, _(b"[OPTIONS] ([ANCESTOR] | --outgoing [URL])"), helpcategory=command.CATEGORY_CHANGE_MANAGEMENT, ) def histedit(ui, repo, *freeargs, **opts): """interactively edit changeset history This command lets you edit a linear series of changesets (up to and including the working directory, which should be clean). You can: - `pick` to [re]order a changeset - `drop` to omit changeset - `mess` to reword the changeset commit message - `fold` to combine it with the preceding changeset (using the later date) - `roll` like fold, but discarding this commit's description and date - `edit` to edit this changeset (preserving date) - `base` to checkout changeset and apply further changesets from there There are a number of ways to select the root changeset: - Specify ANCESTOR directly - Use --outgoing -- it will be the first linear changeset not included in destination. (See :hg:`help config.paths.default-push`) - Otherwise, 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. .. container:: verbose If you use --outgoing, this command will abort if there are ambiguous outgoing revisions. 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). """ opts = pycompat.byteskwargs(opts) # kludge: _chistedit only works for starting an edit, not aborting # or continuing, so fall back to regular _texthistedit for those # operations. if ui.interface(b'histedit') == b'curses' and _getgoal(opts) == goalnew: return _chistedit(ui, repo, freeargs, opts) return _texthistedit(ui, repo, freeargs, opts) def _texthistedit(ui, repo, freeargs, opts): state = histeditstate(repo) with repo.wlock() as wlock, repo.lock() as lock: state.wlock = wlock state.lock = lock _histedit(ui, repo, state, freeargs, opts) goalcontinue = b'continue' goalabort = b'abort' goaleditplan = b'edit-plan' goalnew = b'new' def _getgoal(opts): if opts.get(b'continue'): return goalcontinue if opts.get(b'abort'): return goalabort if opts.get(b'edit_plan'): return goaleditplan return goalnew def _readfile(ui, path): if path == b'-': with ui.timeblockedsection(b'histedit'): return ui.fin.read() else: with open(path, b'rb') as f: return f.read() def _validateargs(ui, repo, freeargs, opts, goal, rules, revs): # 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.StateError(_(b'source has mq patches applied')) # basic argument incompatibility processing outg = opts.get(b'outgoing') editplan = opts.get(b'edit_plan') abort = opts.get(b'abort') force = opts.get(b'force') if force and not outg: raise error.InputError(_(b'--force only allowed with --outgoing')) if goal == b'continue': if any((outg, abort, revs, freeargs, rules, editplan)): raise error.InputError(_(b'no arguments allowed with --continue')) elif goal == b'abort': if any((outg, revs, freeargs, rules, editplan)): raise error.InputError(_(b'no arguments allowed with --abort')) elif goal == b'edit-plan': if any((outg, revs, freeargs)): raise error.InputError( _(b'only --commands argument allowed with --edit-plan') ) else: if outg: if revs: raise error.InputError( _(b'no revisions allowed with --outgoing') ) if len(freeargs) > 1: raise error.InputError( _(b'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.InputError( _(b'histedit requires exactly one ancestor revision') ) def _histedit(ui, repo, state, freeargs, opts): fm = ui.formatter(b'histedit', opts) fm.startitem() goal = _getgoal(opts) revs = opts.get(b'rev', []) nobackup = not ui.configbool(b'rewrite', b'backup-bundle') rules = opts.get(b'commands', b'') state.keep = opts.get(b'keep', False) _validateargs(ui, repo, freeargs, opts, goal, rules, revs) hastags = False if revs: revs = logcmdutil.revrange(repo, revs) ctxs = [repo[rev] for rev in revs] for ctx in ctxs: tags = [tag for tag in ctx.tags() if tag != b'tip'] if not hastags: hastags = len(tags) if hastags: if ui.promptchoice( _( b'warning: tags associated with the given' b' changeset will be lost after histedit.\n' b'do you want to continue (yN)? $$ &Yes $$ &No' ), default=1, ): raise error.CanceledError(_(b'histedit cancelled\n')) # rebuild state if goal == goalcontinue: state.read() state = bootstrapcontinue(ui, state, opts) elif goal == goaleditplan: _edithisteditplan(ui, repo, state, rules) return elif goal == goalabort: _aborthistedit(ui, repo, state, nobackup=nobackup) return else: # goal == goalnew _newhistedit(ui, repo, state, revs, freeargs, opts) _continuehistedit(ui, repo, state) _finishhistedit(ui, repo, state, fm) fm.end() def _continuehistedit(ui, repo, state): """This function runs after either: - bootstrapcontinue (if the goal is 'continue') - _newhistedit (if the goal is 'new') """ # 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 == b'fold' and nextact and nextact.verb == b'fold': state.actions[idx].__class__ = _multifold # Force an initial state file write, so the user can run --abort/continue # even if there's an exception before the first transaction serialize. state.write() tr = None # Don't use singletransaction by default since it rolls the entire # transaction back if an unexpected exception happens (like a # pretxncommit hook throws, or the user aborts the commit msg editor). if ui.configbool(b"histedit", b"singletransaction"): # Don't use a 'with' for the transaction, since actions may close # and reopen a transaction. For example, if the action executes an # external process it may choose to commit the transaction first. tr = repo.transaction(b'histedit') progress = ui.makeprogress( _(b"editing"), unit=_(b'changes'), total=len(state.actions) ) with progress, util.acceptintervention(tr): while state.actions: state.write(tr=tr) actobj = state.actions[0] progress.increment(item=actobj.torule()) ui.debug( b'histedit: processing %s %s\n' % (actobj.verb, actobj.torule()) ) parentctx, replacement_ = actobj.run() state.parentctxnode = parentctx.node() state.replacements.extend(replacement_) state.actions.pop(0) state.write() def _finishhistedit(ui, repo, state, fm): """This action runs when histedit is finishing its session""" mergemod.update(repo[state.parentctxnode]) mapping, tmpnodes, created, ntm = processreplacement(state) if mapping: for prec, succs in mapping.items(): if not succs: ui.debug(b'histedit: %s is dropped\n' % short(prec)) else: ui.debug( b'histedit: %s is replaced by %s\n' % (short(prec), short(succs[0])) ) if len(succs) > 1: m = b'histedit: %s' for n in succs[1:]: ui.debug(m % short(n)) if not state.keep: if mapping: movetopmostbookmarks(repo, state.topmost, ntm) # TODO update mq state else: mapping = {} for n in tmpnodes: if n in repo: mapping[n] = () # remove entries about unknown nodes has_node = repo.unfiltered().changelog.index.has_node mapping = { k: v for k, v in mapping.items() if has_node(k) and all(has_node(n) for n in v) } scmutil.cleanupnodes(repo, mapping, b'histedit') hf = fm.hexfunc fl = fm.formatlist fd = fm.formatdict nodechanges = fd( { hf(oldn): fl([hf(n) for n in newn], name=b'node') for oldn, newn in mapping.items() }, key=b"oldnode", value=b"newnodes", ) fm.data(nodechanges=nodechanges) state.clear() if os.path.exists(repo.sjoin(b'undo')): os.unlink(repo.sjoin(b'undo')) if repo.vfs.exists(b'histedit-last-edit.txt'): repo.vfs.unlink(b'histedit-last-edit.txt') def _aborthistedit(ui, repo, state, nobackup=False): try: state.read() __, leafs, tmpnodes, __ = processreplacement(state) ui.debug(b'restore wc to old parent %s\n' % short(state.topmost)) # Recover our old commits if necessary if not state.topmost in repo and state.backupfile: backupfile = repo.vfs.join(state.backupfile) f = hg.openpath(ui, backupfile) gen = exchange.readbundle(ui, f, backupfile) with repo.transaction(b'histedit.abort') as tr: bundle2.applybundle( repo, gen, tr, source=b'histedit', url=b'bundle:' + backupfile, ) os.remove(backupfile) # check whether we should update away if repo.unfiltered().revs( b'parents() and (%n or %ln::)', state.parentctxnode, leafs | tmpnodes, ): hg.clean(repo, state.topmost, show_stats=True, quietempty=True) cleanupnode(ui, repo, tmpnodes, nobackup=nobackup) cleanupnode(ui, repo, leafs, nobackup=nobackup) except Exception: if state.inprogress(): ui.warn( _( b'warning: encountered an exception during histedit ' b'--abort; the repository may not have been completely ' b'cleaned up\n' ) ) raise finally: state.clear() def hgaborthistedit(ui, repo): state = histeditstate(repo) nobackup = not ui.configbool(b'rewrite', b'backup-bundle') with repo.wlock() as wlock, repo.lock() as lock: state.wlock = wlock state.lock = lock _aborthistedit(ui, repo, state, nobackup=nobackup) def _edithisteditplan(ui, repo, state, rules): state.read() if not rules: comment = geteditcomment( ui, short(state.parentctxnode), short(state.topmost) ) rules = ruleeditor(repo, ui, state.actions, comment) else: rules = _readfile(ui, rules) actions = parserules(rules, state) ctxs = [repo[act.node] for act in state.actions if act.node] warnverifyactions(ui, repo, actions, state, ctxs) state.actions = actions state.write() def _newhistedit(ui, repo, state, revs, freeargs, opts): outg = opts.get(b'outgoing') rules = opts.get(b'commands', b'') force = opts.get(b'force') cmdutil.checkunfinished(repo) cmdutil.bailifchanged(repo) topmost = repo.dirstate.p1() if outg: if freeargs: remote = freeargs[0] else: remote = None root = findoutgoing(ui, repo, remote, force, opts) else: rr = list(repo.set(b'roots(%ld)', logcmdutil.revrange(repo, revs))) if len(rr) != 1: raise error.InputError( _( b'The specified revisions must have ' b'exactly one common root' ) ) root = rr[0].node() revs = between(repo, root, topmost, state.keep) if not revs: raise error.InputError( _(b'%s is not an ancestor of working directory') % short(root) ) ctxs = [repo[r] for r in revs] wctx = repo[None] # Please don't ask me why `ancestors` is this value. I figured it # out with print-debugging, not by actually understanding what the # merge code is doing. :( ancs = [repo[b'.']] # Sniff-test to make sure we won't collide with untracked files in # the working directory. If we don't do this, we can get a # collision after we've started histedit and backing out gets ugly # for everyone, especially the user. for c in [ctxs[0].p1()] + ctxs: try: mergemod.calculateupdates( repo, wctx, c, ancs, # These parameters were determined by print-debugging # what happens later on inside histedit. branchmerge=False, force=False, acceptremote=False, followcopies=False, ) except error.Abort: raise error.StateError( _( b"untracked files in working directory conflict with files in %s" ) % c ) if not rules: comment = geteditcomment(ui, short(root), short(topmost)) actions = [pick(state, r) for r in revs] rules = ruleeditor(repo, ui, actions, comment) else: rules = _readfile(ui, rules) actions = parserules(rules, state) warnverifyactions(ui, repo, actions, state, ctxs) parentctxnode = repo[root].p1().node() state.parentctxnode = parentctxnode state.actions = actions state.topmost = topmost state.replacements = [] ui.log( b"histedit", b"%d actions to histedit\n", len(actions), histedit_num_actions=len(actions), ) # Create a backup so we can always abort completely. backupfile = None if not obsolete.isenabled(repo, obsolete.createmarkersopt): backupfile = repair.backupbundle( repo, [parentctxnode], [topmost], root, b'histedit' ) state.backupfile = backupfile def _getsummary(ctx): return stringutil.firstline(ctx.description()) def bootstrapcontinue(ui, state, opts): repo = state.repo ms = mergestatemod.mergestate.read(repo) mergeutil.checkunresolved(ms) 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.""" revs = repo.revs(b'%n::%n', old, new) if revs and not keep: rewriteutil.precheck(repo, revs, b'edit') if repo.revs(b'(%ld) and merge()', revs): raise error.StateError( _(b'cannot edit history that contains merges') ) return pycompat.maplist(repo.changelog.node, revs) def ruleeditor(repo, ui, actions, editcomment=b""): """open an editor to edit rules rules are in the format [ [act, ctx], ...] like in state.rules """ if repo.ui.configbool(b"experimental", b"histedit.autoverb"): newact = util.sortdict() for act in actions: ctx = repo[act.node] summary = _getsummary(ctx) fword = summary.split(b' ', 1)[0].lower() added = False # if it doesn't end with the special character '!' just skip this if fword.endswith(b'!'): fword = fword[:-1] if fword in primaryactions | secondaryactions | tertiaryactions: act.verb = fword # get the target summary tsum = summary[len(fword) + 1 :].lstrip() # safe but slow: reverse iterate over the actions so we # don't clash on two commits having the same summary for na, l in reversed(list(newact.items())): actx = repo[na.node] asum = _getsummary(actx) if asum == tsum: added = True l.append(act) break if not added: newact[act] = [] # copy over and flatten the new list actions = [] for na, l in newact.items(): actions.append(na) actions += l rules = b'\n'.join([act.torule() for act in actions]) rules += b'\n\n' rules += editcomment rules = ui.edit( rules, ui.username(), {b'prefix': b'histedit'}, repopath=repo.path, action=b'histedit', ) # Save edit rules in .hg/histedit-last-edit.txt in case # the user needs to ask for help after something # surprising happens. with repo.vfs(b'histedit-last-edit.txt', b'wb') as f: f.write(rules) 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(b'#') ] actions = [] for r in rules: if b' ' not in r: raise error.ParseError(_(b'malformed line "%s"') % r) verb, rest = r.split(b' ', 1) if verb not in actiontable: raise error.ParseError(_(b'unknown action "%s"') % verb) action = actiontable[verb].fromrule(state, rest) actions.append(action) return actions def warnverifyactions(ui, repo, actions, state, ctxs): try: verifyactions(actions, state, ctxs) except error.ParseError: if repo.vfs.exists(b'histedit-last-edit.txt'): ui.warn( _( b'warning: histedit rules saved ' b'to: .hg/histedit-last-edit.txt\n' ) ) raise 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 = {c.node() for c in ctxs} seen = set() prev = None if actions and actions[0].verb in [b'roll', b'fold']: raise error.ParseError( _(b'first changeset cannot use verb "%s"') % actions[0].verb ) for action in actions: action.verify(prev, expected, seen) prev = action if action.node is not None: seen.add(action.node) missing = sorted(expected - seen) # sort to stabilize output if state.repo.ui.configbool(b'histedit', b'dropmissing'): if len(actions) == 0: raise error.ParseError( _(b'no rules provided'), hint=_(b'use strip extension to remove commits'), ) drops = [drop(state, n) for n in missing] # put the in the beginning so they execute immediately and # don't show in the edit-plan in the future actions[:0] = drops elif missing: raise error.ParseError( _(b'missing rules for changeset %s') % short(missing[0]), hint=_( b'use "drop %s" to discard, see also: ' b"'hg help -e histedit.config'" ) % short(missing[0]), ) def adjustreplacementsfrommarkers(repo, oldreplacements): """Adjust replacements from obsolescence markers Replacements structure is originally generated based on histedit's state and does not account for changes that are not recorded there. This function fixes that by adding data read from obsolescence markers""" if not obsolete.isenabled(repo, obsolete.createmarkersopt): return oldreplacements unfi = repo.unfiltered() get_rev = unfi.changelog.index.get_rev obsstore = repo.obsstore newreplacements = list(oldreplacements) oldsuccs = [r[1] for r in oldreplacements] # successors that have already been added to succstocheck once seensuccs = set().union( *oldsuccs ) # create a set from an iterable of tuples succstocheck = list(seensuccs) while succstocheck: n = succstocheck.pop() missing = get_rev(n) is None markers = obsstore.successors.get(n, ()) if missing and not markers: # dead end, mark it as such newreplacements.append((n, ())) for marker in markers: nsuccs = marker[1] newreplacements.append((n, nsuccs)) for nsucc in nsuccs: if nsucc not in seensuccs: seensuccs.add(nsucc) succstocheck.append(nsucc) return newreplacements 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 = adjustreplacementsfrommarkers(state.repo, 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) get_rev = state.repo.changelog.index.get_rev for prec, succs in final.items(): final[prec] = sorted(succs, key=get_rev) # 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 movetopmostbookmarks(repo, oldtopmost, newtopmost): """Move bookmark from oldtopmost to newly created topmost 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. """ if not oldtopmost or not newtopmost: return oldbmarks = repo.nodebookmarks(oldtopmost) if oldbmarks: with repo.lock(), repo.transaction(b'histedit') as tr: marks = repo._bookmarks changes = [] for name in oldbmarks: changes.append((name, newtopmost)) marks.applychanges(repo, tr, changes) def cleanupnode(ui, repo, nodes, nobackup=False): """strip a group of nodes from the repository The set of node to strip may contains unknown nodes.""" with 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) has_node = repo.changelog.index.has_node nodes = sorted(n for n in nodes if has_node(n)) roots = [c.node() for c in repo.set(b"roots(%ln)", nodes)] if roots: backup = not nobackup repair.strip(ui, repo, roots, backup=backup) def stripwrapper(orig, ui, repo, nodelist, *args, **kwargs): if isinstance(nodelist, bytes): nodelist = [nodelist] state = histeditstate(repo) if state.inprogress(): state.read() histedit_nodes = { action.node for action in state.actions if action.node } common_nodes = histedit_nodes & set(nodelist) if common_nodes: raise error.Abort( _(b"histedit in progress, can't strip %s") % b', '.join(short(x) for x in common_nodes) ) return orig(ui, repo, nodelist, *args, **kwargs) extensions.wrapfunction(repair, 'strip', stripwrapper) def summaryhook(ui, repo): state = histeditstate(repo) if not state.inprogress(): return state.read() if state.actions: # i18n: column positioning for "hg summary" ui.write( _(b'hist: %s (histedit --continue)\n') % ( ui.label(_(b'%d remaining'), b'histedit.remaining') % len(state.actions) ) ) def extsetup(ui): cmdutil.summaryhooks.add(b'histedit', summaryhook) statemod.addunfinished( b'histedit', fname=b'histedit-state', allowcommit=True, continueflag=True, abortfunc=hgaborthistedit, )