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