transplant: recover added/removed files after failed application

hgext/transplant.py

@@ -1,563 +1,565 b''
 # Patch transplanting extension for Mercurial
 #
 # Copyright 2006 Brendan Cully <[e-mail]>
 #
 # This software may be used and distributed according to the terms
 # of the GNU General Public License, incorporated herein by reference.
 
 from mercurial.demandload import *
 from mercurial.i18n import gettext as _
 demandload(globals(), 'os tempfile')
 demandload(globals(), 'mercurial:bundlerepo,cmdutil,commands,hg,merge,patch')
 demandload(globals(), 'mercurial:revlog,util')
 
 '''patch transplanting tool
 
 This extension allows you to transplant patches from another branch.
 
 Transplanted patches are recorded in .hg/transplant/transplants, as a map
 from a changeset hash to its hash in the source repository.
 '''
 
 class transplantentry:
     def __init__(self, lnode, rnode):
         self.lnode = lnode
         self.rnode = rnode
 
 class transplants:
     def __init__(self, path=None, transplantfile=None, opener=None):
         self.path = path
         self.transplantfile = transplantfile
         self.opener = opener
 
         if not opener:
             self.opener = util.opener(self.path)
         self.transplants = []
         self.dirty = False
         self.read()
 
     def read(self):
         abspath = os.path.join(self.path, self.transplantfile)
         if self.transplantfile and os.path.exists(abspath):
             for line in self.opener(self.transplantfile).read().splitlines():
                 lnode, rnode = map(revlog.bin, line.split(':'))
                 self.transplants.append(transplantentry(lnode, rnode))
 
     def write(self):
         if self.dirty and self.transplantfile:
             if not os.path.isdir(self.path):
                 os.mkdir(self.path)
             fp = self.opener(self.transplantfile, 'w')
             for c in self.transplants:
                 l, r = map(revlog.hex, (c.lnode, c.rnode))
                 fp.write(l + ':' + r + '\n')
             fp.close()
         self.dirty = False
 
     def get(self, rnode):
         return [t for t in self.transplants if t.rnode == rnode]
 
     def set(self, lnode, rnode):
         self.transplants.append(transplantentry(lnode, rnode))
         self.dirty = True
 
     def remove(self, transplant):
         del self.transplants[self.transplants.index(transplant)]
         self.dirty = True
 
 class transplanter:
     def __init__(self, ui, repo):
         self.ui = ui
         self.path = repo.join('transplant')
         self.opener = util.opener(self.path)
         self.transplants = transplants(self.path, 'transplants', opener=self.opener)
 
     def applied(self, repo, node, parent):
         '''returns True if a node is already an ancestor of parent
         or has already been transplanted'''
         if hasnode(repo, node):
             if node in repo.changelog.reachable(parent, stop=node):
                 return True
         for t in self.transplants.get(node):
             # it might have been stripped
             if not hasnode(repo, t.lnode):
                 self.transplants.remove(t)
                 return False
             if t.lnode in repo.changelog.reachable(parent, stop=t.lnode):
                 return True
         return False
 
     def apply(self, repo, source, revmap, merges, opts={}):
         '''apply the revisions in revmap one by one in revision order'''
         revs = revmap.keys()
         revs.sort()
 
         p1, p2 = repo.dirstate.parents()
         pulls = []
         diffopts = patch.diffopts(self.ui, opts)
         diffopts.git = True
 
         lock = repo.lock()
         wlock = repo.wlock()
         try:
             for rev in revs:
                 node = revmap[rev]
                 revstr = '%s:%s' % (rev, revlog.short(node))
 
                 if self.applied(repo, node, p1):
                     self.ui.warn(_('skipping already applied revision %s\n') %
                                  revstr)
                     continue
 
                 parents = source.changelog.parents(node)
                 if not opts.get('filter'):
                     # If the changeset parent is the same as the wdir's parent,
                     # just pull it.
                     if parents[0] == p1:
                         pulls.append(node)
                         p1 = node
                         continue
                     if pulls:
                         if source != repo:
                             repo.pull(source, heads=pulls, lock=lock)
                         merge.update(repo, pulls[-1], wlock=wlock)
                         p1, p2 = repo.dirstate.parents()
                         pulls = []
 
                 domerge = False
                 if node in merges:
                     # pulling all the merge revs at once would mean we couldn't
                     # transplant after the latest even if transplants before them
                     # fail.
                     domerge = True
                     if not hasnode(repo, node):
                         repo.pull(source, heads=[node], lock=lock)
 
                 if parents[1] != revlog.nullid:
                     self.ui.note(_('skipping merge changeset %s:%s\n')
                                  % (rev, revlog.short(node)))
                     patchfile = None
                 else:
                     fd, patchfile = tempfile.mkstemp(prefix='hg-transplant-')
                     fp = os.fdopen(fd, 'w')
                     patch.export(source, [node], fp=fp, opts=diffopts)
                     fp.close()
 
                 del revmap[rev]
                 if patchfile or domerge:
                     try:
                         n = self.applyone(repo, node, source.changelog.read(node),
                                           patchfile, merge=domerge,
                                           log=opts.get('log'),
                                           filter=opts.get('filter'),
                                           lock=lock, wlock=wlock)
                         if domerge:
                             self.ui.status(_('%s merged at %s\n') % (revstr,
                                       revlog.short(n)))
                         else:
                             self.ui.status(_('%s transplanted to %s\n') % (revlog.short(node),
                                                                        revlog.short(n)))
                     finally:
                         if patchfile:
                             os.unlink(patchfile)
             if pulls:
                 repo.pull(source, heads=pulls, lock=lock)
                 merge.update(repo, pulls[-1], wlock=wlock)
         finally:
             self.saveseries(revmap, merges)
             self.transplants.write()
 
     def filter(self, filter, changelog, patchfile):
         '''arbitrarily rewrite changeset before applying it'''
 
         self.ui.status('filtering %s' % patchfile)
         util.system('%s %s' % (filter, util.shellquote(patchfile)),
                     environ={'HGUSER': changelog[1]},
                     onerr=util.Abort, errprefix=_('filter failed'))
 
     def applyone(self, repo, node, cl, patchfile, merge=False, log=False,
                  filter=None, lock=None, wlock=None):
         '''apply the patch in patchfile to the repository as a transplant'''
         (manifest, user, (time, timezone), files, message) = cl[:5]
         date = "%d %d" % (time, timezone)
         extra = {'transplant_source': node}
         if filter:
             self.filter(filter, cl, patchfile)
             patchfile, message, user, date = patch.extract(self.ui, file(patchfile))
 
         if log:
             message += '\n(transplanted from %s)' % revlog.hex(node)
 
         self.ui.status(_('applying %s\n') % revlog.short(node))
         self.ui.note('%s %s\n%s\n' % (user, date, message))
 
         if not patchfile and not merge:
             raise util.Abort(_('can only omit patchfile if merging'))
         if patchfile:
             try:
                 files = {}
-                fuzz = patch.patch(patchfile, self.ui, cwd=repo.root,
-                                   files=files)
-                if not files:
-                    self.ui.warn(_('%s: empty changeset') % revlog.hex(node))
-                    return
-                files = patch.updatedir(self.ui, repo, files, wlock=wlock)
+                try:
+                    fuzz = patch.patch(patchfile, self.ui, cwd=repo.root,
+                                       files=files)
+                    if not files:
+                        self.ui.warn(_('%s: empty changeset') % revlog.hex(node))
+                        return
+                finally:
+                    files = patch.updatedir(self.ui, repo, files, wlock=wlock)
                 if filter:
                     os.unlink(patchfile)
             except Exception, inst:
                 if filter:
                     os.unlink(patchfile)
                 p1 = repo.dirstate.parents()[0]
                 p2 = node
                 self.log(user, date, message, p1, p2, merge=merge)
                 self.ui.write(str(inst) + '\n')
                 raise util.Abort(_('Fix up the merge and run hg transplant --continue'))
         else:
             files = None
         if merge:
             p1, p2 = repo.dirstate.parents()
             repo.dirstate.setparents(p1, node)
 
         n = repo.commit(files, message, user, date, lock=lock, wlock=wlock,
                         extra=extra)
         if not merge:
             self.transplants.set(n, node)
 
         return n
 
     def resume(self, repo, source, opts=None):
         '''recover last transaction and apply remaining changesets'''
         if os.path.exists(os.path.join(self.path, 'journal')):
             n, node = self.recover(repo)
             self.ui.status(_('%s transplanted as %s\n') % (revlog.short(node),
                                                            revlog.short(n)))
         seriespath = os.path.join(self.path, 'series')
         if not os.path.exists(seriespath):
             return
         nodes, merges = self.readseries()
         revmap = {}
         for n in nodes:
             revmap[source.changelog.rev(n)] = n
         os.unlink(seriespath)
 
         self.apply(repo, source, revmap, merges, opts)
 
     def recover(self, repo):
         '''commit working directory using journal metadata'''
         node, user, date, message, parents = self.readlog()
         merge = len(parents) == 2
 
         if not user or not date or not message or not parents[0]:
             raise util.Abort(_('transplant log file is corrupt'))
 
         wlock = repo.wlock()
         p1, p2 = repo.dirstate.parents()
         if p1 != parents[0]:
             raise util.Abort(_('working dir not at transplant parent %s') %
                              revlog.hex(parents[0]))
         if merge:
             repo.dirstate.setparents(p1, parents[1])
         n = repo.commit(None, message, user, date, wlock=wlock)
         if not n:
             raise util.Abort(_('commit failed'))
         if not merge:
             self.transplants.set(n, node)
         self.unlog()
 
         return n, node
 
     def readseries(self):
         nodes = []
         merges = []
         cur = nodes
         for line in self.opener('series').read().splitlines():
             if line.startswith('# Merges'):
                 cur = merges
                 continue
             cur.append(revlog.bin(line))
 
         return (nodes, merges)
 
     def saveseries(self, revmap, merges):
         if not revmap:
             return
 
         if not os.path.isdir(self.path):
             os.mkdir(self.path)
         series = self.opener('series', 'w')
         revs = revmap.keys()
         revs.sort()
         for rev in revs:
             series.write(revlog.hex(revmap[rev]) + '\n')
         if merges:
             series.write('# Merges\n')
             for m in merges:
                 series.write(revlog.hex(m) + '\n')
         series.close()
 
     def log(self, user, date, message, p1, p2, merge=False):
         '''journal changelog metadata for later recover'''
 
         if not os.path.isdir(self.path):
             os.mkdir(self.path)
         fp = self.opener('journal', 'w')
         fp.write('# User %s\n' % user)
         fp.write('# Date %s\n' % date)
         fp.write('# Node ID %s\n' % revlog.hex(p2))
         fp.write('# Parent ' + revlog.hex(p1) + '\n')
         if merge:
             fp.write('# Parent ' + revlog.hex(p2) + '\n')
         fp.write(message.rstrip() + '\n')
         fp.close()
 
     def readlog(self):
         parents = []
         message = []
         for line in self.opener('journal').read().splitlines():
             if line.startswith('# User '):
                 user = line[7:]
             elif line.startswith('# Date '):
                 date = line[7:]
             elif line.startswith('# Node ID '):
                 node = revlog.bin(line[10:])
             elif line.startswith('# Parent '):
                 parents.append(revlog.bin(line[9:]))
             else:
                 message.append(line)
         return (node, user, date, '\n'.join(message), parents)
 
     def unlog(self):
         '''remove changelog journal'''
         absdst = os.path.join(self.path, 'journal')
         if os.path.exists(absdst):
             os.unlink(absdst)
 
     def transplantfilter(self, repo, source, root):
         def matchfn(node):
             if self.applied(repo, node, root):
                 return False
             if source.changelog.parents(node)[1] != revlog.nullid:
                 return False
             extra = source.changelog.read(node)[5]
             cnode = extra.get('transplant_source')
             if cnode and self.applied(repo, cnode, root):
                 return False
             return True
 
         return matchfn
 
 def hasnode(repo, node):
     try:
         return repo.changelog.rev(node) != None
     except revlog.RevlogError:
         return False
 
 def browserevs(ui, repo, nodes, opts):
     '''interactively transplant changesets'''
     def browsehelp(ui):
         ui.write('y: transplant this changeset\n'
                  'n: skip this changeset\n'
                  'm: merge at this changeset\n'
                  'p: show patch\n'
                  'c: commit selected changesets\n'
                  'q: cancel transplant\n'
                  '?: show this help\n')
 
     displayer = cmdutil.show_changeset(ui, repo, opts)
     transplants = []
     merges = []
     for node in nodes:
         displayer.show(changenode=node)
         action = None
         while not action:
             action = ui.prompt(_('apply changeset? [ynmpcq?]:'))
             if action == '?':
                 browsehelp(ui)
                 action = None
             elif action == 'p':
                 parent = repo.changelog.parents(node)[0]
                 patch.diff(repo, parent, node)
                 action = None
             elif action not in ('y', 'n', 'm', 'c', 'q'):
                 ui.write('no such option\n')
                 action = None
         if action == 'y':
             transplants.append(node)
         elif action == 'm':
             merges.append(node)
         elif action == 'c':
             break
         elif action == 'q':
             transplants = ()
             merges = ()
             break
     return (transplants, merges)
 
 def transplant(ui, repo, *revs, **opts):
     '''transplant changesets from another branch
 
     Selected changesets will be applied on top of the current working
     directory with the log of the original changeset. If --log is
     specified, log messages will have a comment appended of the form:
 
     (transplanted from CHANGESETHASH)
 
     You can rewrite the changelog message with the --filter option.
     Its argument will be invoked with the current changelog message
     as $1 and the patch as $2.
 
     If --source is specified, selects changesets from the named
     repository. If --branch is specified, selects changesets from the
     branch holding the named revision, up to that revision. If --all
     is specified, all changesets on the branch will be transplanted,
     otherwise you will be prompted to select the changesets you want.
 
     hg transplant --branch REVISION --all will rebase the selected branch
     (up to the named revision) onto your current working directory.
 
     You can optionally mark selected transplanted changesets as
     merge changesets. You will not be prompted to transplant any
     ancestors of a merged transplant, and you can merge descendants
     of them normally instead of transplanting them.
 
     If no merges or revisions are provided, hg transplant will start
     an interactive changeset browser.
 
     If a changeset application fails, you can fix the merge by hand and
     then resume where you left off by calling hg transplant --continue.
     '''
     def getoneitem(opts, item, errmsg):
         val = opts.get(item)
         if val:
             if len(val) > 1:
                 raise util.Abort(errmsg)
             else:
                 return val[0]
 
     def getremotechanges(repo, url):
         sourcerepo = ui.expandpath(url)
         source = hg.repository(ui, sourcerepo)
         incoming = repo.findincoming(source, force=True)
         if not incoming:
             return (source, None, None)
 
         bundle = None
         if not source.local():
             cg = source.changegroup(incoming, 'incoming')
             bundle = commands.write_bundle(cg, compress=False)
             source = bundlerepo.bundlerepository(ui, repo.root, bundle)
 
         return (source, incoming, bundle)
 
     def incwalk(repo, incoming, branches, match=util.always):
         if not branches:
             branches=None
         for node in repo.changelog.nodesbetween(incoming, branches)[0]:
             if match(node):
                 yield node
 
     def transplantwalk(repo, root, branches, match=util.always):
         if not branches:
             branches = repo.heads()
         ancestors = []
         for branch in branches:
             ancestors.append(repo.changelog.ancestor(root, branch))
         for node in repo.changelog.nodesbetween(ancestors, branches)[0]:
             if match(node):
                 yield node
 
     def checkopts(opts, revs):
         if opts.get('continue'):
             if filter(lambda opt: opts.get(opt), ('branch', 'all', 'merge')):
                 raise util.Abort(_('--continue is incompatible with branch, all or merge'))
             return
         if not (opts.get('source') or revs or
                 opts.get('merge') or opts.get('branch')):
             raise util.Abort(_('no source URL, branch tag or revision list provided'))
         if opts.get('all'):
             if not opts.get('branch'):
                 raise util.Abort(_('--all requires a branch revision'))
             if revs:
                 raise util.Abort(_('--all is incompatible with a revision list'))
 
     checkopts(opts, revs)
 
     if not opts.get('log'):
         opts['log'] = ui.config('transplant', 'log')
     if not opts.get('filter'):
         opts['filter'] = ui.config('transplant', 'filter')
 
     tp = transplanter(ui, repo)
 
     p1, p2 = repo.dirstate.parents()
     if p1 == revlog.nullid:
         raise util.Abort(_('no revision checked out'))
     if not opts.get('continue'):
         if p2 != revlog.nullid:
             raise util.Abort(_('outstanding uncommitted merges'))
         m, a, r, d = repo.status()[:4]
         if m or a or r or d:
             raise util.Abort(_('outstanding local changes'))
 
     bundle = None
     source = opts.get('source')
     if source:
         (source, incoming, bundle) = getremotechanges(repo, source)
     else:
         source = repo
 
     try:
         if opts.get('continue'):
             tp.resume(repo, source, opts)
             return
 
         tf=tp.transplantfilter(repo, source, p1)
         if opts.get('prune'):
             prune = [source.lookup(r)
                      for r in cmdutil.revrange(source, opts.get('prune'))]
             matchfn = lambda x: tf(x) and x not in prune
         else:
             matchfn = tf
         branches = map(source.lookup, opts.get('branch', ()))
         merges = map(source.lookup, opts.get('merge', ()))
         revmap = {}
         if revs:
             for r in cmdutil.revrange(source, revs):
                 revmap[int(r)] = source.lookup(r)
         elif opts.get('all') or not merges:
             if source != repo:
                 alltransplants = incwalk(source, incoming, branches, match=matchfn)
             else:
                 alltransplants = transplantwalk(source, p1, branches, match=matchfn)
             if opts.get('all'):
                 revs = alltransplants
             else:
                 revs, newmerges = browserevs(ui, source, alltransplants, opts)
                 merges.extend(newmerges)
             for r in revs:
                 revmap[source.changelog.rev(r)] = r
         for r in merges:
             revmap[source.changelog.rev(r)] = r
 
         revs = revmap.keys()
         revs.sort()
         pulls = []
 
         tp.apply(repo, source, revmap, merges, opts)
     finally:
         if bundle:
             os.unlink(bundle)
 
 cmdtable = {
     "transplant":
         (transplant,
          [('s', 'source', '', _('pull patches from REPOSITORY')),
           ('b', 'branch', [], _('pull patches from branch BRANCH')),
           ('a', 'all', None, _('pull all changesets up to BRANCH')),
           ('p', 'prune', [], _('skip over REV')),
           ('m', 'merge', [], _('merge at REV')),
           ('', 'log', None, _('append transplant info to log message')),
           ('c', 'continue', None, _('continue last transplant session after repair')),
           ('', 'filter', '', _('filter changesets through FILTER'))],
          _('hg transplant [-s REPOSITORY] [-b BRANCH] [-p REV] [-m REV] [-n] REV...'))
 }

tests/test-transplant

@@ -1,86 +1,90 b''
 #!/bin/sh
 
 cat <<EOF >> $HGRCPATH
 [extensions]
 transplant=
 EOF
 
 hg init t
 cd t
 echo r1 > r1
 hg ci -Amr1 -d'0 0'
 echo r2 > r2
 hg ci -Amr2 -d'1 0'
 hg up 0
 
 echo b1 > b1
 hg ci -Amb1 -d '0 0'
 echo b2 > b2
 hg ci -Amb2 -d '1 0'
 echo b3 > b3
 hg ci -Amb3 -d '2 0'
 
 hg log --template '{rev} {parents} {desc}\n'
 
 cd ..
 hg clone t rebase
 cd rebase
 
 hg up -C 1
 echo '% rebase b onto r1'
 hg transplant -a -b tip
 hg log --template '{rev} {parents} {desc}\n'
 
 cd ..
 hg clone t prune
 cd prune
 
 hg up -C 1
 echo '% rebase b onto r1, skipping b2'
 hg transplant -a -b tip -p 3
 hg log --template '{rev} {parents} {desc}\n'
 
 cd ..
 echo '% remote transplant'
 hg clone -r 1 t remote
 cd remote
 hg transplant --log -s ../t 2 4
 hg log --template '{rev} {parents} {desc}\n'
 
 echo '% skip previous transplants'
 hg transplant -s ../t -a -b 4
 hg log --template '{rev} {parents} {desc}\n'
 
 echo '% skip local changes transplanted to the source'
 echo b4 > b4
 hg ci -Amb4 -d '3 0'
 cd ..
 hg clone t pullback
 cd pullback
 hg transplant -s ../remote -a -b tip
 
 echo '% transplant --continue'
 hg init ../tc
 cd ../tc
 cat <<EOF > foo
 foo
 bar
 baz
 EOF
+echo toremove > toremove
 hg ci -Amfoo -d '0 0'
 cat <<EOF > foo
 foo2
 bar2
 baz2
 EOF
-hg ci -mfoo2 -d '0 0'
+rm toremove
+echo added > added
+hg ci -Amfoo2 -d '0 0'
 echo bar > bar
 hg ci -Ambar -d '0 0'
 echo bar2 >> bar
 hg ci -mbar2 -d '0 0'
 hg up 0
 echo foobar > foo
 hg ci -mfoobar -d '0 0'
 hg transplant 1:3
 echo merge > foo
 hg transplant --continue
+hg locate

tests/test-transplant.out

@@ -1,92 +1,98 b''
 adding r1
 adding r2
 0 files updated, 0 files merged, 1 files removed, 0 files unresolved
 adding b1
 adding b2
 adding b3
 4  b3
 3  b2
 2 0:17ab29e464c6  b1
 1  r2
 0  r1
 4 files updated, 0 files merged, 0 files removed, 0 files unresolved
 1 files updated, 0 files merged, 3 files removed, 0 files unresolved
 % rebase b onto r1
 applying 37a1297eb21b
 37a1297eb21b transplanted to e234d668f844
 applying 722f4667af76
 722f4667af76 transplanted to 539f377d78df
 applying a53251cdf717
 a53251cdf717 transplanted to ffd6818a3975
 7  b3
 6  b2
 5 1:d11e3596cc1a  b1
 4  b3
 3  b2
 2 0:17ab29e464c6  b1
 1  r2
 0  r1
 4 files updated, 0 files merged, 0 files removed, 0 files unresolved
 1 files updated, 0 files merged, 3 files removed, 0 files unresolved
 % rebase b onto r1, skipping b2
 applying 37a1297eb21b
 37a1297eb21b transplanted to e234d668f844
 applying a53251cdf717
 a53251cdf717 transplanted to 7275fda4d04f
 6  b3
 5 1:d11e3596cc1a  b1
 4  b3
 3  b2
 2 0:17ab29e464c6  b1
 1  r2
 0  r1
 % remote transplant
 requesting all changes
 adding changesets
 adding manifests
 adding file changes
 added 2 changesets with 2 changes to 2 files
 2 files updated, 0 files merged, 0 files removed, 0 files unresolved
 searching for changes
 applying 37a1297eb21b
 37a1297eb21b transplanted to c19cf0ccb069
 applying a53251cdf717
 a53251cdf717 transplanted to f7fe5bf98525
 3  b3
 (transplanted from a53251cdf717679d1907b289f991534be05c997a)
 2  b1
 (transplanted from 37a1297eb21b3ef5c5d2ffac22121a0988ed9f21)
 1  r2
 0  r1
 % skip previous transplants
 searching for changes
 applying 722f4667af76
 722f4667af76 transplanted to 47156cd86c0b
 4  b2
 3  b3
 (transplanted from a53251cdf717679d1907b289f991534be05c997a)
 2  b1
 (transplanted from 37a1297eb21b3ef5c5d2ffac22121a0988ed9f21)
 1  r2
 0  r1
 % skip local changes transplanted to the source
 adding b4
 4 files updated, 0 files merged, 0 files removed, 0 files unresolved
 searching for changes
 applying 4333daefcb15
 4333daefcb15 transplanted to 5f42c04e07cc
 % transplant --continue
 adding foo
+adding toremove
+adding added
+removing toremove
 adding bar
-1 files updated, 0 files merged, 1 files removed, 0 files unresolved
-applying c029d661401c
+2 files updated, 0 files merged, 2 files removed, 0 files unresolved
+applying a1e30dd1b8e7
 foo
 Hunk #1 FAILED at 1.
 1 out of 1 hunk FAILED -- saving rejects to file foo.rej
 patch command failed: exited with status 1
 abort: Fix up the merge and run hg transplant --continue
-c029d661401c transplanted as 1b09cda4cf1b
-applying 67f0722fdc4f
-67f0722fdc4f transplanted to faa04033bb41
-applying 84c5126bd0d2
-84c5126bd0d2 transplanted to b35f4019ccc9
+a1e30dd1b8e7 transplanted as e6d0b5145568
+applying 1739ac5f6139
+1739ac5f6139 transplanted to 48f780141a79
+applying 0282d5fbbe02
+0282d5fbbe02 transplanted to 821d17b1a3ed
+added
+bar
+foo