convert: avoid updating tags when there is nothing new
Previously, when converting from a mercurial repo there would be an extraneous
commit at the end of the convert process that would rewrite tags. Now, we check
if there are any new tags before doing this rewriting.
# 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, bookmarks, error, scmutil
from common import NoRepo, commit, converter_source, converter_sink
import re
sha1re = re.compile(r'\b[0-9a-f]{6,40}\b')
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 repository')
% 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 repository')
% path)
self.created.append(path)
except error.RepoError:
ui.traceback()
raise NoRepo(_("could not create hg repository %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 self.repo.join("shamap")
def authorfile(self):
return self.repo.join("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 Exception:
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 Exception:
missings.setdefault(b[1], []).append(b[0])
if missings:
self.after()
for pbranch, heads in sorted(missings.iteritems()):
pbranchpath = os.path.join(self.path, pbranch)
prepo = hg.peer(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, mode = source.getfile(f, v)
if f == '.hgtags':
data = self._rewritetags(source, revmap, data)
return context.memfilectx(f, data, 'l' in mode, 'x' in mode,
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
sha1s = re.findall(sha1re, text)
for sha1 in sha1s:
oldrev = source.lookuprev(sha1)
newrev = revmap.get(oldrev)
if newrev is not None:
text = text.replace(sha1, newrev[:len(sha1)])
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]
closed = 'close' in commit.extra
if not closed and not man.cmp(m1node, man.revision(mnode)):
self.ui.status(_("filtering out empty revision\n"))
self.repo.rollback(force=True)
return parent
return p2
def puttags(self, tags):
try:
parentctx = self.repo[self.tagsbranch]
tagparent = parentctx.node()
except error.RepoError:
parentctx = None
tagparent = nullid
oldlines = set()
for branch, heads in self.repo.branchmap().iteritems():
for h in heads:
if '.hgtags' in self.repo[h]:
oldlines.update(
set(self.repo[h]['.hgtags'].data().splitlines(True)))
oldlines = sorted(list(oldlines))
newlines = sorted([("%s %s\n" % (tags[tag], tag)) for tag in tags])
if newlines == oldlines:
return None, None
# if the old and new tags match, then there is nothing to update
oldtags = set()
newtags = set()
for line in oldlines:
s = line.strip().split(' ', 1)
if len(s) != 2:
continue
oldtags.add(s[1])
for line in newlines:
s = line.strip().split(' ', 1)
if len(s) != 2:
continue
if s[1] not in oldtags:
newtags.add(s[1].strip())
if not newtags:
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
def putbookmarks(self, updatedbookmark):
if not len(updatedbookmark):
return
self.ui.status(_("updating bookmarks\n"))
destmarks = self.repo._bookmarks
for bookmark in updatedbookmark:
destmarks[bookmark] = bin(updatedbookmark[bookmark])
destmarks.write()
def hascommit(self, rev):
if rev not in self.repo and self.clonebranches:
raise util.Abort(_('revision %s not found in destination '
'repository (lookups with clonebranches=true '
'are not implemented)') % rev)
return rev in self.repo
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 repository") % 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')
hgrevs = ui.config('convert', 'hg.revs')
if hgrevs is None:
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 r in self.repo.changelog.descendants([startrev]):
children[self.repo.changelog.node(r)] = 1
self.keep = children.__contains__
else:
self.keep = util.always
if rev:
self._heads = [self.repo[rev].node()]
else:
self._heads = self.repo.heads()
else:
if rev or startnode is not None:
raise util.Abort(_('hg.revs cannot be combined with '
'hg.startrev or --rev'))
nodes = set()
parents = set()
for r in scmutil.revrange(self.repo, [hgrevs]):
ctx = self.repo[r]
nodes.add(ctx.node())
parents.update(p.node() for p in ctx.parents())
self.keep = nodes.__contains__
self._heads = nodes - parents
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):
return [hex(h) for h in self._heads if self.keep(h)]
def getfile(self, name, rev):
try:
fctx = self.changectx(rev)[name]
return fctx.data(), fctx.flags()
except error.LookupError, err:
raise IOError(err)
def getchanges(self, rev):
ctx = self.changectx(rev)
parents = self.parents(ctx)
if not parents:
files = sorted(ctx.manifest())
# getcopies() is not needed for roots, but it is a simple way to
# detect missing revlogs and abort on errors or 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:
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(), '%Y-%m-%d %H:%M:%S %1%2'),
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(self.repo.join('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 hasnativeclose(self):
return True
def lookuprev(self, rev):
try:
return hex(self.repo.lookup(rev))
except error.RepoError:
return None
def getbookmarks(self):
return bookmarks.listbookmarks(self.repo)
def checkrevformat(self, revstr, mapname='splicemap'):
""" Mercurial, revision string is a 40 byte hex """
self.checkhexformat(revstr, mapname)