histedit: use stable iteration order for processing bookmarks

Random dict iteration order caused test failure in
test-histedit-bookmark-motion.t.

hgext/histedit.py

@@ -1,564 +1,564 b''
 # histedit.py - interactive history editing for mercurial
 #
 # Copyright 2009 Augie Fackler <[e-mail]>
 #
 # 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.
 
 Inspired by git rebase --interactive.
 """
 try:
     import cPickle as pickle
 except ImportError:
     import pickle
 import tempfile
 import os
 
 from mercurial import bookmarks
 from mercurial import cmdutil
 from mercurial import discovery
 from mercurial import error
 from mercurial import hg
 from mercurial import node
 from mercurial import patch
 from mercurial import repair
 from mercurial import scmutil
 from mercurial import util
 from mercurial.i18n import _
 
 testedwith = 'internal'
 
 editcomment = """
 
 # Edit history between %s and %s
 #
 # Commands:
 #  p, pick = use commit
 #  e, edit = use commit, but stop for amending
 #  f, fold = use commit, but fold into previous commit (combines N and N-1)
 #  d, drop = remove commit from history
 #  m, mess = edit message without changing commit content
 #
 """
 
 def between(repo, old, new, keep):
     revs = [old]
     current = old
     while current != new:
         ctx = repo[current]
         if not keep and len(ctx.children()) > 1:
             raise util.Abort(_('cannot edit history that would orphan nodes'))
         if len(ctx.parents()) != 1 and ctx.parents()[1] != node.nullid:
             raise util.Abort(_("can't edit history with merges"))
         if not ctx.children():
             current = new
         else:
             current = ctx.children()[0].node()
             revs.append(current)
     if len(repo[current].children()) and not keep:
         raise util.Abort(_('cannot edit history that would orphan nodes'))
     return revs
 
 
 def pick(ui, repo, ctx, ha, opts):
     oldctx = repo[ha]
     if oldctx.parents()[0] == ctx:
         ui.debug('node %s unchanged\n' % ha)
         return oldctx, [], [], []
     hg.update(repo, ctx.node())
     fd, patchfile = tempfile.mkstemp(prefix='hg-histedit-')
     fp = os.fdopen(fd, 'w')
     diffopts = patch.diffopts(ui, opts)
     diffopts.git = True
     diffopts.ignorews = False
     diffopts.ignorewsamount = False
     diffopts.ignoreblanklines = False
     gen = patch.diff(repo, oldctx.parents()[0].node(), ha, opts=diffopts)
     for chunk in gen:
         fp.write(chunk)
     fp.close()
     try:
         files = set()
         try:
             patch.patch(ui, repo, patchfile, files=files, eolmode=None)
             if not files:
                 ui.warn(_('%s: empty changeset')
                              % node.hex(ha))
                 return ctx, [], [], []
         finally:
             os.unlink(patchfile)
     except Exception:
         raise util.Abort(_('Fix up the change and run '
                            'hg histedit --continue'))
     n = repo.commit(text=oldctx.description(), user=oldctx.user(),
                     date=oldctx.date(), extra=oldctx.extra())
     return repo[n], [n], [oldctx.node()], []
 
 
 def edit(ui, repo, ctx, ha, opts):
     oldctx = repo[ha]
     hg.update(repo, ctx.node())
     fd, patchfile = tempfile.mkstemp(prefix='hg-histedit-')
     fp = os.fdopen(fd, 'w')
     diffopts = patch.diffopts(ui, opts)
     diffopts.git = True
     diffopts.ignorews = False
     diffopts.ignorewsamount = False
     diffopts.ignoreblanklines = False
     gen = patch.diff(repo, oldctx.parents()[0].node(), ha, opts=diffopts)
     for chunk in gen:
         fp.write(chunk)
     fp.close()
     try:
         files = set()
         try:
             patch.patch(ui, repo, patchfile, files=files, eolmode=None)
         finally:
             os.unlink(patchfile)
     except Exception:
         pass
     raise util.Abort(_('Make changes as needed, you may commit or record as '
                        'needed now.\nWhen you are finished, run hg'
                        ' histedit --continue to resume.'))
 
 def fold(ui, repo, ctx, ha, opts):
     oldctx = repo[ha]
     hg.update(repo, ctx.node())
     fd, patchfile = tempfile.mkstemp(prefix='hg-histedit-')
     fp = os.fdopen(fd, 'w')
     diffopts = patch.diffopts(ui, opts)
     diffopts.git = True
     diffopts.ignorews = False
     diffopts.ignorewsamount = False
     diffopts.ignoreblanklines = False
     gen = patch.diff(repo, oldctx.parents()[0].node(), ha, opts=diffopts)
     for chunk in gen:
         fp.write(chunk)
     fp.close()
     try:
         files = set()
         try:
             patch.patch(ui, repo, patchfile, files=files, eolmode=None)
             if not files:
                 ui.warn(_('%s: empty changeset')
                              % node.hex(ha))
                 return ctx, [], [], []
         finally:
             os.unlink(patchfile)
     except Exception:
         raise util.Abort(_('Fix up the change and run '
                            'hg histedit --continue'))
     n = repo.commit(text='fold-temp-revision %s' % ha, user=oldctx.user(),
                     date=oldctx.date(), extra=oldctx.extra())
     return finishfold(ui, repo, ctx, oldctx, n, opts, [])
 
 def finishfold(ui, repo, ctx, oldctx, newnode, opts, internalchanges):
     parent = ctx.parents()[0].node()
     hg.update(repo, parent)
     fd, patchfile = tempfile.mkstemp(prefix='hg-histedit-')
     fp = os.fdopen(fd, 'w')
     diffopts = patch.diffopts(ui, opts)
     diffopts.git = True
     diffopts.ignorews = False
     diffopts.ignorewsamount = False
     diffopts.ignoreblanklines = False
     gen = patch.diff(repo, parent, newnode, opts=diffopts)
     for chunk in gen:
         fp.write(chunk)
     fp.close()
     files = set()
     try:
         patch.patch(ui, repo, patchfile, files=files, eolmode=None)
     finally:
         os.unlink(patchfile)
     newmessage = '\n***\n'.join(
         [ctx.description()] +
         [repo[r].description() for r in internalchanges] +
         [oldctx.description()])
     # If the changesets are from the same author, keep it.
     if ctx.user() == oldctx.user():
         username = ctx.user()
     else:
         username = ui.username()
     newmessage = ui.edit(newmessage, username)
     n = repo.commit(text=newmessage, user=username,
                     date=max(ctx.date(), oldctx.date()), extra=oldctx.extra())
     return repo[n], [n], [oldctx.node(), ctx.node()], [newnode]
 
 def drop(ui, repo, ctx, ha, opts):
     return ctx, [], [repo[ha].node()], []
 
 
 def message(ui, repo, ctx, ha, opts):
     oldctx = repo[ha]
     hg.update(repo, ctx.node())
     fd, patchfile = tempfile.mkstemp(prefix='hg-histedit-')
     fp = os.fdopen(fd, 'w')
     diffopts = patch.diffopts(ui, opts)
     diffopts.git = True
     diffopts.ignorews = False
     diffopts.ignorewsamount = False
     diffopts.ignoreblanklines = False
     gen = patch.diff(repo, oldctx.parents()[0].node(), ha, opts=diffopts)
     for chunk in gen:
         fp.write(chunk)
     fp.close()
     try:
         files = set()
         try:
             patch.patch(ui, repo, patchfile, files=files, eolmode=None)
         finally:
             os.unlink(patchfile)
     except Exception:
         raise util.Abort(_('Fix up the change and run '
                            'hg histedit --continue'))
     message = oldctx.description()
     message = ui.edit(message, ui.username())
     new = repo.commit(text=message, user=oldctx.user(), date=oldctx.date(),
                       extra=oldctx.extra())
     newctx = repo[new]
     if oldctx.node() != newctx.node():
         return newctx, [new], [oldctx.node()], []
     # We didn't make an edit, so just indicate no replaced nodes
     return newctx, [new], [], []
 
 
 def makedesc(c):
     summary = ''
     if c.description():
         summary = c.description().splitlines()[0]
     line = 'pick %s %d %s' % (c.hex()[:12], c.rev(), summary)
     return line[:80]  # trim to 80 chars so it's not stupidly wide in my editor
 
 actiontable = {'p': pick,
                'pick': pick,
                'e': edit,
                'edit': edit,
                'f': fold,
                'fold': fold,
                'd': drop,
                'drop': drop,
                'm': message,
                'mess': message,
                }
 def histedit(ui, repo, *parent, **opts):
     """hg histedit <parent>
     """
     # TODO only abort if we try and histedit mq patches, not just
     # blanket if mq patches are applied somewhere
     mq = getattr(repo, 'mq', None)
     if mq and mq.applied:
         raise util.Abort(_('source has mq patches applied'))
 
     parent = list(parent) + opts.get('rev', [])
     if opts.get('outgoing'):
         if len(parent) > 1:
             raise util.Abort(
                 _('only one repo argument allowed with --outgoing'))
         elif parent:
             parent = parent[0]
 
         dest = ui.expandpath(parent or 'default-push', parent 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.repository(hg.remoteui(repo, opts), dest)
 
         if revs:
             revs = [repo.lookup(rev) for rev in revs]
 
         parent = discovery.findcommonoutgoing(
             repo, other, [], force=opts.get('force')).missing[0:1]
     else:
         if opts.get('force'):
             raise util.Abort(_('--force only allowed with --outgoing'))
 
     if opts.get('continue', False):
         if len(parent) != 0:
             raise util.Abort(_('no arguments allowed with --continue'))
         (parentctxnode, created, replaced,
          tmpnodes, existing, rules, keep, tip, replacemap) = readstate(repo)
         currentparent, wantnull = repo.dirstate.parents()
         parentctx = repo[parentctxnode]
         # discover any nodes the user has added in the interim
         newchildren = [c for c in parentctx.children()
                        if c.node() not in existing]
         action, currentnode = rules.pop(0)
         while newchildren:
             if action in ('f', 'fold'):
                 tmpnodes.extend([n.node() for n in newchildren])
             else:
                 created.extend([n.node() for n in newchildren])
             filtered = []
             for r in newchildren:
                 filtered += [c for c in r.children() if c.node not in existing]
             newchildren = filtered
         m, a, r, d = repo.status()[:4]
         oldctx = repo[currentnode]
         message = oldctx.description()
         if action in ('e', 'edit', 'm', 'mess'):
             message = ui.edit(message, ui.username())
         elif action in ('f', 'fold'):
             message = 'fold-temp-revision %s' % currentnode
         new = None
         if m or a or r or d:
             new = repo.commit(text=message, user=oldctx.user(),
                               date=oldctx.date(), extra=oldctx.extra())
 
         if action in ('f', 'fold'):
             if new:
                 tmpnodes.append(new)
             else:
                 new = newchildren[-1]
             (parentctx, created_, replaced_, tmpnodes_) = finishfold(
                 ui, repo, parentctx, oldctx, new, opts, newchildren)
             replaced.extend(replaced_)
             created.extend(created_)
             tmpnodes.extend(tmpnodes_)
         elif action not in ('d', 'drop'):
             if new != oldctx.node():
                 replaced.append(oldctx.node())
             if new:
                 if new != oldctx.node():
                     created.append(new)
                 parentctx = repo[new]
 
     elif opts.get('abort', False):
         if len(parent) != 0:
             raise util.Abort(_('no arguments allowed with --abort'))
         (parentctxnode, created, replaced, tmpnodes,
          existing, rules, keep, tip, replacemap) = readstate(repo)
         ui.debug('restore wc to old tip %s\n' % node.hex(tip))
         hg.clean(repo, tip)
         ui.debug('should strip created nodes %s\n' %
                  ', '.join([node.hex(n)[:12] for n in created]))
         ui.debug('should strip temp nodes %s\n' %
                  ', '.join([node.hex(n)[:12] for n in tmpnodes]))
         for nodes in (created, tmpnodes):
             for n in reversed(nodes):
                 try:
                     repair.strip(ui, repo, n)
                 except error.LookupError:
                     pass
         os.unlink(os.path.join(repo.path, 'histedit-state'))
         return
     else:
         cmdutil.bailifchanged(repo)
         if os.path.exists(os.path.join(repo.path, 'histedit-state')):
             raise util.Abort(_('history edit already in progress, try '
                                '--continue or --abort'))
 
         tip, empty = repo.dirstate.parents()
 
 
         if len(parent) != 1:
             raise util.Abort(_('histedit requires exactly one parent revision'))
         parent = scmutil.revsingle(repo, parent[0]).node()
 
         keep = opts.get('keep', False)
         revs = between(repo, parent, tip, keep)
 
         ctxs = [repo[r] for r in revs]
         existing = [r.node() for r in ctxs]
         rules = opts.get('commands', '')
         if not rules:
             rules = '\n'.join([makedesc(c) for c in ctxs])
             rules += editcomment % (node.hex(parent)[:12], node.hex(tip)[:12])
             rules = ui.edit(rules, ui.username())
             # 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()
         else:
             f = open(rules)
             rules = f.read()
             f.close()
         rules = [l for l in (r.strip() for r in rules.splitlines())
                  if l and not l[0] == '#']
         rules = verifyrules(rules, repo, ctxs)
 
         parentctx = repo[parent].parents()[0]
         keep = opts.get('keep', False)
         replaced = []
         replacemap = {}
         tmpnodes = []
         created = []
 
 
     while rules:
         writestate(repo, parentctx.node(), created, replaced,
                    tmpnodes, existing, rules, keep, tip, replacemap)
         action, ha = rules.pop(0)
         (parentctx, created_, replaced_, tmpnodes_) = actiontable[action](
             ui, repo, parentctx, ha, opts)
 
         hexshort = lambda x: node.hex(x)[:12]
 
         if replaced_:
             clen, rlen = len(created_), len(replaced_)
             if clen == rlen == 1:
                 ui.debug('histedit: exact replacement of %s with %s\n' % (
                     hexshort(replaced_[0]), hexshort(created_[0])))
 
                 replacemap[replaced_[0]] = created_[0]
             elif clen > rlen:
                 assert rlen == 1, ('unexpected replacement of '
                                    '%d changes with %d changes' % (rlen, clen))
                 # made more changesets than we're replacing
                 # TODO synthesize patch names for created patches
                 replacemap[replaced_[0]] = created_[-1]
                 ui.debug('histedit: created many, assuming %s replaced by %s' %
                          (hexshort(replaced_[0]), hexshort(created_[-1])))
             elif rlen > clen:
                 if not created_:
                     # This must be a drop. Try and put our metadata on
                     # the parent change.
                     assert rlen == 1
                     r = replaced_[0]
                     ui.debug('histedit: %s seems replaced with nothing, '
                             'finding a parent\n' % (hexshort(r)))
                     pctx = repo[r].parents()[0]
                     if pctx.node() in replacemap:
                         ui.debug('histedit: parent is already replaced\n')
                         replacemap[r] = replacemap[pctx.node()]
                     else:
                         replacemap[r] = pctx.node()
                     ui.debug('histedit: %s best replaced by %s\n' % (
                         hexshort(r), hexshort(replacemap[r])))
                 else:
                     assert len(created_) == 1
                     for r in replaced_:
                         ui.debug('histedit: %s replaced by %s\n' % (
                             hexshort(r), hexshort(created_[0])))
                         replacemap[r] = created_[0]
             else:
                 assert False, (
                     'Unhandled case in replacement mapping! '
                     'replacing %d changes with %d changes' % (rlen, clen))
         created.extend(created_)
         replaced.extend(replaced_)
         tmpnodes.extend(tmpnodes_)
 
     hg.update(repo, parentctx.node())
 
     if not keep:
         if replacemap:
             ui.note(_('histedit: Should update metadata for the following '
                       'changes:\n'))
 
             def copybms(old, new):
                 if old in tmpnodes or old in created:
                     # can't have any metadata we'd want to update
                     return
                 while new in replacemap:
                     new = replacemap[new]
                 ui.note(_('histedit:  %s to %s\n') % (hexshort(old),
                                                       hexshort(new)))
                 octx = repo[old]
                 marks = octx.bookmarks()
                 if marks:
                     ui.note(_('histedit:     moving bookmarks %s\n') %
                               ', '.join(marks))
                     for mark in marks:
                         repo._bookmarks[mark] = new
                     bookmarks.write(repo)
 
             # We assume that bookmarks on the tip should remain
             # tipmost, but bookmarks on non-tip changesets should go
             # to their most reasonable successor. As a result, find
             # the old tip and new tip and copy those bookmarks first,
             # then do the rest of the bookmark copies.
             oldtip = sorted(replacemap.keys(), key=repo.changelog.rev)[-1]
             newtip = sorted(replacemap.values(), key=repo.changelog.rev)[-1]
             copybms(oldtip, newtip)
 
-            for old, new in replacemap.iteritems():
+            for old, new in sorted(replacemap.iteritems()):
                 copybms(old, new)
                 # TODO update mq state
 
         ui.debug('should strip replaced nodes %s\n' %
                  ', '.join([node.hex(n)[:12] for n in replaced]))
         for n in sorted(replaced, key=lambda x: repo[x].rev()):
             try:
                 repair.strip(ui, repo, n)
             except error.LookupError:
                 pass
 
     ui.debug('should strip temp nodes %s\n' %
              ', '.join([node.hex(n)[:12] for n in tmpnodes]))
     for n in reversed(tmpnodes):
         try:
             repair.strip(ui, repo, n)
         except error.LookupError:
             pass
     os.unlink(os.path.join(repo.path, 'histedit-state'))
     if os.path.exists(repo.sjoin('undo')):
         os.unlink(repo.sjoin('undo'))
 
 
 def writestate(repo, parentctxnode, created, replaced,
                tmpnodes, existing, rules, keep, oldtip, replacemap):
     fp = open(os.path.join(repo.path, 'histedit-state'), 'w')
     pickle.dump((parentctxnode, created, replaced,
                  tmpnodes, existing, rules, keep, oldtip, replacemap),
                 fp)
     fp.close()
 
 def readstate(repo):
     """Returns a tuple of (parentnode, created, replaced, tmp, existing, rules,
                            keep, oldtip, replacemap ).
     """
     fp = open(os.path.join(repo.path, 'histedit-state'))
     return pickle.load(fp)
 
 
 def verifyrules(rules, repo, ctxs):
     """Verify that there exists exactly one edit rule per given changeset.
 
     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.
     """
     parsed = []
     if len(rules) != len(ctxs):
         raise util.Abort(_('must specify a rule for each changeset once'))
     for r in rules:
         if ' ' not in r:
             raise util.Abort(_('malformed line "%s"') % r)
         action, rest = r.split(' ', 1)
         if ' ' in rest.strip():
             ha, rest = rest.split(' ', 1)
         else:
             ha = r.strip()
         try:
             if repo[ha] not in ctxs:
                 raise util.Abort(
                     _('may not use changesets other than the ones listed'))
         except error.RepoError:
             raise util.Abort(_('unknown changeset %s listed') % ha)
         if action not in actiontable:
             raise util.Abort(_('unknown action "%s"') % action)
         parsed.append([action, ha])
     return parsed
 
 
 cmdtable = {
     "histedit":
         (histedit,
          [('', 'commands', '', _(
              'Read history edits from the specified file.')),
           ('c', 'continue', False, _('continue an edit already in progress')),
           ('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')),
           ],
          __doc__,
          ),
 }

tests/test-histedit-bookmark-motion.t

@@ -1,187 +1,187 b''
   $ . "$TESTDIR/histedit-helpers.sh"
 
   $ cat >> $HGRCPATH <<EOF
   > [extensions]
   > graphlog=
   > histedit=
   > EOF
 
   $ hg init r
   $ cd r
 
   $ for x in a b c d e f ; do
   >     echo $x > $x
   >     hg add $x
   >     hg ci -m $x
   > done
 
   $ hg book -r 1 will-move-backwards
   $ hg book -r 2 two
   $ hg book -r 2 also-two
   $ hg book -r 3 three
   $ hg book -r 4 four
   $ hg book -r tip five
   $ hg log --graph
   @  changeset:   5:652413bf663e
   |  bookmark:    five
   |  tag:         tip
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     f
   |
   o  changeset:   4:e860deea161a
   |  bookmark:    four
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     e
   |
   o  changeset:   3:055a42cdd887
   |  bookmark:    three
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     d
   |
   o  changeset:   2:177f92b77385
   |  bookmark:    also-two
   |  bookmark:    two
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     c
   |
   o  changeset:   1:d2ae7f538514
   |  bookmark:    will-move-backwards
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     b
   |
   o  changeset:   0:cb9a9f314b8b
      user:        test
      date:        Thu Jan 01 00:00:00 1970 +0000
      summary:     a
   
   $ HGEDITOR=cat hg histedit 1
   pick d2ae7f538514 1 b
   pick 177f92b77385 2 c
   pick 055a42cdd887 3 d
   pick e860deea161a 4 e
   pick 652413bf663e 5 f
   
   # Edit history between d2ae7f538514 and 652413bf663e
   #
   # Commands:
   #  p, pick = use commit
   #  e, edit = use commit, but stop for amending
   #  f, fold = use commit, but fold into previous commit (combines N and N-1)
   #  d, drop = remove commit from history
   #  m, mess = edit message without changing commit content
   #
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ cat >> commands.txt <<EOF
   > pick 177f92b77385 2 c
   > drop d2ae7f538514 1 b
   > pick 055a42cdd887 3 d
   > fold e860deea161a 4 e
   > pick 652413bf663e 5 f
   > EOF
   $ hg histedit 1 --commands commands.txt --verbose | grep histedit
   histedit: Should update metadata for the following changes:
   histedit:  055a42cdd887 to ae467701c500
   histedit:     moving bookmarks three
+  histedit:  177f92b77385 to d36c0562f908
+  histedit:     moving bookmarks also-two, two
   histedit:  652413bf663e to 0efacef7cb48
   histedit:     moving bookmarks five
   histedit:  d2ae7f538514 to cb9a9f314b8b
   histedit:     moving bookmarks will-move-backwards
   histedit:  e860deea161a to ae467701c500
   histedit:     moving bookmarks four
-  histedit:  177f92b77385 to d36c0562f908
-  histedit:     moving bookmarks also-two, two
   saved backup bundle to $TESTTMP/r/.hg/strip-backup/d2ae7f538514-backup.hg
   saved backup bundle to $TESTTMP/r/.hg/strip-backup/34a9919932c1-backup.hg
   $ hg log --graph
   @  changeset:   3:0efacef7cb48
   |  bookmark:    five
   |  tag:         tip
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     f
   |
   o  changeset:   2:ae467701c500
   |  bookmark:    four
   |  bookmark:    three
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     d
   |
   o  changeset:   1:d36c0562f908
   |  bookmark:    also-two
   |  bookmark:    two
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     c
   |
   o  changeset:   0:cb9a9f314b8b
      bookmark:    will-move-backwards
      user:        test
      date:        Thu Jan 01 00:00:00 1970 +0000
      summary:     a
   
   $ HGEDITOR=cat hg histedit 1
   pick d36c0562f908 1 c
   pick ae467701c500 2 d
   pick 0efacef7cb48 3 f
   
   # Edit history between d36c0562f908 and 0efacef7cb48
   #
   # Commands:
   #  p, pick = use commit
   #  e, edit = use commit, but stop for amending
   #  f, fold = use commit, but fold into previous commit (combines N and N-1)
   #  d, drop = remove commit from history
   #  m, mess = edit message without changing commit content
   #
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ cat > commands.txt << EOF
   > pick d36c0562f908 1 c
   > pick 0efacef7cb48 3 f
   > pick ae467701c500 2 d
   > EOF
   $ hg histedit 1 --commands commands.txt --verbose | grep histedit
   histedit: Should update metadata for the following changes:
   histedit:  0efacef7cb48 to 1be9c35b4cb2
   histedit:     moving bookmarks five
+  histedit:  0efacef7cb48 to 7c044e3e33a9
   histedit:  ae467701c500 to 1be9c35b4cb2
   histedit:     moving bookmarks four, three
-  histedit:  0efacef7cb48 to 7c044e3e33a9
   saved backup bundle to $TESTTMP/r/.hg/strip-backup/ae467701c500-backup.hg
 
 We expect 'five' to stay at tip, since the tipmost bookmark is most
 likely the useful signal.
 
   $ hg log --graph
   @  changeset:   3:1be9c35b4cb2
   |  bookmark:    five
   |  bookmark:    four
   |  bookmark:    three
   |  tag:         tip
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     d
   |
   o  changeset:   2:7c044e3e33a9
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     f
   |
   o  changeset:   1:d36c0562f908
   |  bookmark:    also-two
   |  bookmark:    two
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     c
   |
   o  changeset:   0:cb9a9f314b8b
      bookmark:    will-move-backwards
      user:        test
      date:        Thu Jan 01 00:00:00 1970 +0000
      summary:     a