mirror of
https://github.com/facebook/sapling.git
synced 2024-10-08 07:49:11 +03:00
692cfc05a8
(makes issue2135, issue2264 more obvious, but does nothing to fix either one) This seems to happen in two distinct cases: * patch.patch() claims success but changes nothing (e.g. the transplanted changeset adds an empty file that already exists) * patch.patch() makes changes, but repo.status() fails to report them Both of these seem like bugs in other parts of Mercurial, so arguably it's not transplant's job to detect the failure to commit. However: * detecting the problem as soon as possible is desirable * it prevents a more obscure crash later, in transplants.write() * there might be other lurking (or future) bugs that cause repo.commit() to do nothing Also, in the case of issue2264 (source changesets silently dropped by transplant), the only way to spot the problem currently is the crash in transplants.write(). Failure to transplant a patch should abort immediately, whether it's user error (patch does not apply) or a Mercurial bug (e.g. repo.status() failing to report changes).
621 lines
23 KiB
Python
621 lines
23 KiB
Python
# Patch transplanting extension for Mercurial
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#
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# Copyright 2006, 2007 Brendan Cully <brendan@kublai.com>
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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'''command to transplant changesets from another branch
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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
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map from a changeset hash to its hash in the source repository.
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'''
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from mercurial.i18n import _
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import os, tempfile
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from mercurial import bundlerepo, changegroup, cmdutil, hg, merge, match
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from mercurial import patch, revlog, util, error, discovery
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class transplantentry(object):
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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(object):
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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(object):
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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',
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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 = sorted(revmap)
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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 = wlock = None
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try:
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wlock = repo.wlock()
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lock = repo.lock()
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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
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# wdir's parent, 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)
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merge.update(repo, pulls[-1], False, False, None)
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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
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# couldn't transplant after the latest even if
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# transplants before them 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])
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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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gen = patch.diff(source, parents[0], node, opts=diffopts)
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for chunk in gen:
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fp.write(chunk)
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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,
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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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if n and 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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elif n:
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self.ui.status(_('%s transplanted to %s\n')
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% (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)
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merge.update(repo, pulls[-1], False, False, None)
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finally:
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self.saveseries(revmap, merges)
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self.transplants.write()
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lock.release()
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wlock.release()
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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\n') % patchfile)
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user, date, msg = (changelog[1], changelog[2], changelog[4])
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fd, headerfile = tempfile.mkstemp(prefix='hg-transplant-')
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fp = os.fdopen(fd, 'w')
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fp.write("# HG changeset patch\n")
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fp.write("# User %s\n" % user)
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fp.write("# Date %d %d\n" % date)
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fp.write(msg + '\n')
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fp.close()
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try:
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util.system('%s %s %s' % (filter, util.shellquote(headerfile),
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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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user, date, msg = self.parselog(file(headerfile))[1:4]
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finally:
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os.unlink(headerfile)
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return (user, date, msg)
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def applyone(self, repo, node, cl, patchfile, merge=False, log=False,
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filter=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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(user, date, message) = self.filter(filter, cl, patchfile)
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if log:
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# we don't translate messages inserted into commits
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message += '\n(transplanted from %s)' % revlog.hex(node)
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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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try:
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patch.patch(patchfile, self.ui, cwd=repo.root,
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files=files, eolmode=None)
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if not files:
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self.ui.warn(_('%s: empty changeset')
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% revlog.hex(node))
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return None
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finally:
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files = patch.updatedir(self.ui, repo, files)
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except Exception, inst:
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seriespath = os.path.join(self.path, 'series')
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if os.path.exists(seriespath):
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os.unlink(seriespath)
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p1 = repo.dirstate.parents()[0]
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p2 = node
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self.log(user, date, message, 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 '
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'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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m = match.always(repo.root, '')
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else:
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m = match.exact(repo.root, '', files)
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n = repo.commit(message, user, date, extra=extra, match=m)
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if not n:
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# Crash here to prevent an unclear crash later, in
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# transplants.write(). This can happen if patch.patch()
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# does nothing but claims success or if repo.status() fails
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# to report changes done by patch.patch(). These both
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# appear to be bugs in other parts of Mercurial, but dying
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# here, as soon as we can detect the problem, is preferable
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# to silently dropping changesets on the floor.
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raise RuntimeError('nothing committed after transplant')
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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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self.transplants.write()
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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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extra = {'transplant_source': node}
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wlock = repo.wlock()
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try:
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p1, p2 = repo.dirstate.parents()
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if p1 != parents[0]:
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raise util.Abort(
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_('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(message, user, date, extra=extra)
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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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finally:
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wlock.release()
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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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for rev in sorted(revmap):
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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 parselog(self, fp):
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parents = []
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message = []
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node = revlog.nullid
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inmsg = False
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for line in fp.read().splitlines():
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if inmsg:
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message.append(line)
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elif 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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elif not line.startswith('# '):
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inmsg = True
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message.append(line)
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return (node, user, date, '\n'.join(message), parents)
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def log(self, user, date, message, 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' % user)
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fp.write('# Date %s\n' % date)
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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(message.rstrip() + '\n')
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fp.close()
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def readlog(self):
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return self.parselog(self.opener('journal'))
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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 error.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(repo[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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for chunk in patch.diff(repo, parent, node):
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ui.write(chunk)
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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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displayer.close()
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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 as
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$1 and the patch as $2.
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If --source/-s is specified, selects changesets from the named
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repository. If --branch/-b is specified, selects changesets from
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the branch holding the named revision, up to that revision. If
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--all/-a is specified, all changesets on the branch will be
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transplanted, otherwise you will be prompted to select the
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changesets you want.
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:hg:`transplant --branch REVISION --all` will rebase the selected
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branch (up to the named revision) onto your current working
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directory.
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You can optionally mark selected transplanted changesets as merge
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changesets. You will not be prompted to transplant any ancestors
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of a merged transplant, and you can merge descendants of them
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normally instead of transplanting them.
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If no merges or revisions are provided, :hg:`transplant` will
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start an interactive changeset browser.
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If a changeset application fails, you can fix the merge by hand
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and then resume where you left off by calling :hg:`transplant
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--continue/-c`.
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'''
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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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tmp = discovery.findcommonincoming(repo, source, force=True)
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common, incoming, rheads = tmp
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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():
|
|
if source.capable('changegroupsubset'):
|
|
cg = source.changegroupsubset(incoming, rheads, 'incoming')
|
|
else:
|
|
cg = source.changegroup(incoming, 'incoming')
|
|
bundle = changegroup.writebundle(cg, None, 'HG10UN')
|
|
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 opts.get('branch') or opts.get('all') or opts.get('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 len(repo) > 0 and 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
|
|
|
|
tp.apply(repo, source, revmap, merges, opts)
|
|
finally:
|
|
if bundle:
|
|
source.close()
|
|
os.unlink(bundle)
|
|
|
|
cmdtable = {
|
|
"transplant":
|
|
(transplant,
|
|
[('s', 'source', '',
|
|
_('pull patches from REPO'), _('REPO')),
|
|
('b', 'branch', [],
|
|
_('pull patches from branch BRANCH'), _('BRANCH')),
|
|
('a', 'all', None, _('pull all changesets up to BRANCH')),
|
|
('p', 'prune', [],
|
|
_('skip over REV'), _('REV')),
|
|
('m', 'merge', [],
|
|
_('merge at REV'), _('REV')),
|
|
('', 'log', None, _('append transplant info to log message')),
|
|
('c', 'continue', None, _('continue last transplant session '
|
|
'after repair')),
|
|
('', 'filter', '',
|
|
_('filter changesets through command'), _('CMD'))],
|
|
_('hg transplant [-s REPO] [-b BRANCH [-a]] [-p REV] '
|
|
'[-m REV] [REV]...'))
|
|
}
|