# hg.py - hg backend for convert extension
#
# Copyright 2005-2009 Matt Mackall <mpm@selenic.com> and others
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
# Notes for hg->hg conversion:
#
# * Old versions of Mercurial didn't trim the whitespace from the ends
# of commit messages, but new versions do. Changesets created by
# those older versions, then converted, may thus have different
# hashes for changesets that are otherwise identical.
#
# * Using "--config convert.hg.saverev=true" will make the source
# identifier to be stored in the converted revision. This will cause
# the converted revision to have a different identity than the
# source.
import os, time, cStringIO
from mercurial.i18n import _
from mercurial.node import bin, hex, nullid
from mercurial import hg, util, context, error
from common import NoRepo, commit, converter_source, converter_sink
class mercurial_sink(converter_sink):
def __init__(self, ui, path):
converter_sink.__init__(self, ui, path)
self.branchnames = ui.configbool('convert', 'hg.usebranchnames', True)
self.clonebranches = ui.configbool('convert', 'hg.clonebranches', False)
self.tagsbranch = ui.config('convert', 'hg.tagsbranch', 'default')
self.lastbranch = None
if os.path.isdir(path) and len(os.listdir(path)) > 0:
try:
self.repo = hg.repository(self.ui, path)
if not self.repo.local():
raise NoRepo(_('%s is not a local Mercurial repo') % path)
except error.RepoError, err:
ui.traceback()
raise NoRepo(err.args[0])
else:
try:
ui.status(_('initializing destination %s repository\n') % path)
self.repo = hg.repository(self.ui, path, create=True)
if not self.repo.local():
raise NoRepo(_('%s is not a local Mercurial repo') % path)
self.created.append(path)
except error.RepoError:
ui.traceback()
raise NoRepo("could not create hg repo %s as sink" % path)
self.lock = None
self.wlock = None
self.filemapmode = False
def before(self):
self.ui.debug('run hg sink pre-conversion action\n')
self.wlock = self.repo.wlock()
self.lock = self.repo.lock()
def after(self):
self.ui.debug('run hg sink post-conversion action\n')
if self.lock:
self.lock.release()
if self.wlock:
self.wlock.release()
def revmapfile(self):
return os.path.join(self.path, ".hg", "shamap")
def authorfile(self):
return os.path.join(self.path, ".hg", "authormap")
def getheads(self):
h = self.repo.changelog.heads()
return [ hex(x) for x in h ]
def setbranch(self, branch, pbranches):
if not self.clonebranches:
return
setbranch = (branch != self.lastbranch)
self.lastbranch = branch
if not branch:
branch = 'default'
pbranches = [(b[0], b[1] and b[1] or 'default') for b in pbranches]
pbranch = pbranches and pbranches[0][1] or 'default'
branchpath = os.path.join(self.path, branch)
if setbranch:
self.after()
try:
self.repo = hg.repository(self.ui, branchpath)
except:
self.repo = hg.repository(self.ui, branchpath, create=True)
self.before()
# pbranches may bring revisions from other branches (merge parents)
# Make sure we have them, or pull them.
missings = {}
for b in pbranches:
try:
self.repo.lookup(b[0])
except:
missings.setdefault(b[1], []).append(b[0])
if missings:
self.after()
for pbranch, heads in missings.iteritems():
pbranchpath = os.path.join(self.path, pbranch)
prepo = hg.repository(self.ui, pbranchpath)
self.ui.note(_('pulling from %s into %s\n') % (pbranch, branch))
self.repo.pull(prepo, [prepo.lookup(h) for h in heads])
self.before()
def _rewritetags(self, source, revmap, data):
fp = cStringIO.StringIO()
for line in data.splitlines():
s = line.split(' ', 1)
if len(s) != 2:
continue
revid = revmap.get(source.lookuprev(s[0]))
if not revid:
continue
fp.write('%s %s\n' % (revid, s[1]))
return fp.getvalue()
def putcommit(self, files, copies, parents, commit, source, revmap):
files = dict(files)
def getfilectx(repo, memctx, f):
v = files[f]
data = source.getfile(f, v)
e = source.getmode(f, v)
if f == '.hgtags':
data = self._rewritetags(source, revmap, data)
return context.memfilectx(f, data, 'l' in e, 'x' in e, copies.get(f))
pl = []
for p in parents:
if p not in pl:
pl.append(p)
parents = pl
nparents = len(parents)
if self.filemapmode and nparents == 1:
m1node = self.repo.changelog.read(bin(parents[0]))[0]
parent = parents[0]
if len(parents) < 2: parents.append(nullid)
if len(parents) < 2: parents.append(nullid)
p2 = parents.pop(0)
text = commit.desc
extra = commit.extra.copy()
if self.branchnames and commit.branch:
extra['branch'] = commit.branch
if commit.rev:
extra['convert_revision'] = commit.rev
while parents:
p1 = p2
p2 = parents.pop(0)
ctx = context.memctx(self.repo, (p1, p2), text, files.keys(), getfilectx,
commit.author, commit.date, extra)
self.repo.commitctx(ctx)
text = "(octopus merge fixup)\n"
p2 = hex(self.repo.changelog.tip())
if self.filemapmode and nparents == 1:
man = self.repo.manifest
mnode = self.repo.changelog.read(bin(p2))[0]
if not man.cmp(m1node, man.revision(mnode)):
self.ui.status(_("filtering out empty revision\n"))
self.repo.rollback()
return parent
return p2
def puttags(self, tags):
try:
parentctx = self.repo[self.tagsbranch]
tagparent = parentctx.node()
except error.RepoError:
parentctx = None
tagparent = nullid
try:
oldlines = sorted(parentctx['.hgtags'].data().splitlines(True))
except:
oldlines = []
newlines = sorted([("%s %s\n" % (tags[tag], tag)) for tag in tags])
if newlines == oldlines:
return None, None
data = "".join(newlines)
def getfilectx(repo, memctx, f):
return context.memfilectx(f, data, False, False, None)
self.ui.status(_("updating tags\n"))
date = "%s 0" % int(time.mktime(time.gmtime()))
extra = {'branch': self.tagsbranch}
ctx = context.memctx(self.repo, (tagparent, None), "update tags",
[".hgtags"], getfilectx, "convert-repo", date,
extra)
self.repo.commitctx(ctx)
return hex(self.repo.changelog.tip()), hex(tagparent)
def setfilemapmode(self, active):
self.filemapmode = active
class mercurial_source(converter_source):
def __init__(self, ui, path, rev=None):
converter_source.__init__(self, ui, path, rev)
self.ignoreerrors = ui.configbool('convert', 'hg.ignoreerrors', False)
self.ignored = set()
self.saverev = ui.configbool('convert', 'hg.saverev', False)
try:
self.repo = hg.repository(self.ui, path)
# try to provoke an exception if this isn't really a hg
# repo, but some other bogus compatible-looking url
if not self.repo.local():
raise error.RepoError()
except error.RepoError:
ui.traceback()
raise NoRepo("%s is not a local Mercurial repo" % path)
self.lastrev = None
self.lastctx = None
self._changescache = None
self.convertfp = None
# Restrict converted revisions to startrev descendants
startnode = ui.config('convert', 'hg.startrev')
if startnode is not None:
try:
startnode = self.repo.lookup(startnode)
except error.RepoError:
raise util.Abort(_('%s is not a valid start revision')
% startnode)
startrev = self.repo.changelog.rev(startnode)
children = {startnode: 1}
for rev in self.repo.changelog.descendants(startrev):
children[self.repo.changelog.node(rev)] = 1
self.keep = children.__contains__
else:
self.keep = util.always
def changectx(self, rev):
if self.lastrev != rev:
self.lastctx = self.repo[rev]
self.lastrev = rev
return self.lastctx
def parents(self, ctx):
return [p for p in ctx.parents() if p and self.keep(p.node())]
def getheads(self):
if self.rev:
heads = [self.repo[self.rev].node()]
else:
heads = self.repo.heads()
return [hex(h) for h in heads if self.keep(h)]
def getfile(self, name, rev):
try:
return self.changectx(rev)[name].data()
except error.LookupError, err:
raise IOError(err)
def getmode(self, name, rev):
return self.changectx(rev).manifest().flags(name)
def getchanges(self, rev):
ctx = self.changectx(rev)
parents = self.parents(ctx)
if not parents:
files = sorted(ctx.manifest())
if self.ignoreerrors:
# calling getcopies() is a simple way to detect missing
# revlogs and populate self.ignored
self.getcopies(ctx, parents, files)
return [(f, rev) for f in files if f not in self.ignored], {}
if self._changescache and self._changescache[0] == rev:
m, a, r = self._changescache[1]
else:
m, a, r = self.repo.status(parents[0].node(), ctx.node())[:3]
# getcopies() detects missing revlogs early, run it before
# filtering the changes.
copies = self.getcopies(ctx, parents, m + a)
changes = [(name, rev) for name in m + a + r
if name not in self.ignored]
return sorted(changes), copies
def getcopies(self, ctx, parents, files):
copies = {}
for name in files:
if name in self.ignored:
continue
try:
copysource, copynode = ctx.filectx(name).renamed()
if copysource in self.ignored or not self.keep(copynode):
continue
# Ignore copy sources not in parent revisions
found = False
for p in parents:
if copysource in p:
found = True
break
if not found:
continue
copies[name] = copysource
except TypeError:
pass
except error.LookupError, e:
if not self.ignoreerrors:
raise
self.ignored.add(name)
self.ui.warn(_('ignoring: %s\n') % e)
return copies
def getcommit(self, rev):
ctx = self.changectx(rev)
parents = [p.hex() for p in self.parents(ctx)]
if self.saverev:
crev = rev
else:
crev = None
return commit(author=ctx.user(), date=util.datestr(ctx.date()),
desc=ctx.description(), rev=crev, parents=parents,
branch=ctx.branch(), extra=ctx.extra(),
sortkey=ctx.rev())
def gettags(self):
tags = [t for t in self.repo.tagslist() if t[0] != 'tip']
return dict([(name, hex(node)) for name, node in tags
if self.keep(node)])
def getchangedfiles(self, rev, i):
ctx = self.changectx(rev)
parents = self.parents(ctx)
if not parents and i is None:
i = 0
changes = [], ctx.manifest().keys(), []
else:
i = i or 0
changes = self.repo.status(parents[i].node(), ctx.node())[:3]
changes = [[f for f in l if f not in self.ignored] for l in changes]
if i == 0:
self._changescache = (rev, changes)
return changes[0] + changes[1] + changes[2]
def converted(self, rev, destrev):
if self.convertfp is None:
self.convertfp = open(os.path.join(self.path, '.hg', 'shamap'),
'a')
self.convertfp.write('%s %s\n' % (destrev, rev))
self.convertfp.flush()
def before(self):
self.ui.debug('run hg source pre-conversion action\n')
def after(self):
self.ui.debug('run hg source post-conversion action\n')
def hasnativeorder(self):
return True
def lookuprev(self, rev):
try:
return hex(self.repo.lookup(rev))
except error.RepoError:
return None