import: fix parent selection when importing merges
With "wp1" and "wp2" the current working directory parents, "p1" and "p2" the
patch parents and "parents" the resulting commit parents, the current behaviour
is:
--bypass --exact p2 parents
0 0 0 [wp1, wp2]
0 0 1 [wp1, wp2]/buggy
0 1 0 [p1]
0 1 1 [p1, p2]
1 0 0 [wp1, wp2]
1 0 1 [p1, p2]
1 1 0 [p1]
1 1 1 [p1, p2]
The original behaviour before
f53dc0787424 was:
--bypass --exact p2 parents
0 0 0 [wp1, wp2]
0 0 1 if p1 == wp1 then [p1, p2] otherwise [wp1, wp2]
0 1 0 [p1]
0 1 1 [p1, p2]
This patch restores the previous behaviour when --bypass is not set, and align
--bypass behaviour when --exact is not set with merge diffs.
# bundlerepo.py - repository class for viewing uncompressed bundles
#
# Copyright 2006, 2007 Benoit Boissinot <bboissin@gmail.com>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
"""Repository class for viewing uncompressed bundles.
This provides a read-only repository interface to bundles as if they
were part of the actual repository.
"""
from node import nullid
from i18n import _
import os, tempfile, shutil
import changegroup, util, mdiff, discovery
import localrepo, changelog, manifest, filelog, revlog, error
class bundlerevlog(revlog.revlog):
def __init__(self, opener, indexfile, bundle, linkmapper):
# How it works:
# to retrieve a revision, we need to know the offset of
# the revision in the bundle (an unbundle object).
#
# We store this offset in the index (start), to differentiate a
# rev in the bundle and from a rev in the revlog, we check
# len(index[r]). If the tuple is bigger than 7, it is a bundle
# (it is bigger since we store the node to which the delta is)
#
revlog.revlog.__init__(self, opener, indexfile)
self.bundle = bundle
self.basemap = {}
n = len(self)
chain = None
while True:
chunkdata = bundle.deltachunk(chain)
if not chunkdata:
break
node = chunkdata['node']
p1 = chunkdata['p1']
p2 = chunkdata['p2']
cs = chunkdata['cs']
deltabase = chunkdata['deltabase']
delta = chunkdata['delta']
size = len(delta)
start = bundle.tell() - size
link = linkmapper(cs)
if node in self.nodemap:
# this can happen if two branches make the same change
chain = node
continue
for p in (p1, p2):
if not p in self.nodemap:
raise error.LookupError(p, self.indexfile,
_("unknown parent"))
# start, size, full unc. size, base (unused), link, p1, p2, node
e = (revlog.offset_type(start, 0), size, -1, -1, link,
self.rev(p1), self.rev(p2), node)
self.basemap[n] = deltabase
self.index.insert(-1, e)
self.nodemap[node] = n
chain = node
n += 1
def inbundle(self, rev):
"""is rev from the bundle"""
if rev < 0:
return False
return rev in self.basemap
def bundlebase(self, rev):
return self.basemap[rev]
def _chunk(self, rev):
# Warning: in case of bundle, the diff is against bundlebase,
# not against rev - 1
# XXX: could use some caching
if not self.inbundle(rev):
return revlog.revlog._chunk(self, rev)
self.bundle.seek(self.start(rev))
return self.bundle.read(self.length(rev))
def revdiff(self, rev1, rev2):
"""return or calculate a delta between two revisions"""
if self.inbundle(rev1) and self.inbundle(rev2):
# hot path for bundle
revb = self.rev(self.bundlebase(rev2))
if revb == rev1:
return self._chunk(rev2)
elif not self.inbundle(rev1) and not self.inbundle(rev2):
return revlog.revlog.revdiff(self, rev1, rev2)
return mdiff.textdiff(self.revision(self.node(rev1)),
self.revision(self.node(rev2)))
def revision(self, node):
"""return an uncompressed revision of a given"""
if node == nullid:
return ""
text = None
chain = []
iter_node = node
rev = self.rev(iter_node)
# reconstruct the revision if it is from a changegroup
while self.inbundle(rev):
if self._cache and self._cache[0] == iter_node:
text = self._cache[2]
break
chain.append(rev)
iter_node = self.bundlebase(rev)
rev = self.rev(iter_node)
if text is None:
text = revlog.revlog.revision(self, iter_node)
while chain:
delta = self._chunk(chain.pop())
text = mdiff.patches(text, [delta])
p1, p2 = self.parents(node)
if node != revlog.hash(text, p1, p2):
raise error.RevlogError(_("integrity check failed on %s:%d")
% (self.datafile, self.rev(node)))
self._cache = (node, self.rev(node), text)
return text
def addrevision(self, text, transaction, link, p1=None, p2=None, d=None):
raise NotImplementedError
def addgroup(self, revs, linkmapper, transaction):
raise NotImplementedError
def strip(self, rev, minlink):
raise NotImplementedError
def checksize(self):
raise NotImplementedError
class bundlechangelog(bundlerevlog, changelog.changelog):
def __init__(self, opener, bundle):
changelog.changelog.__init__(self, opener)
linkmapper = lambda x: x
bundlerevlog.__init__(self, opener, self.indexfile, bundle,
linkmapper)
class bundlemanifest(bundlerevlog, manifest.manifest):
def __init__(self, opener, bundle, linkmapper):
manifest.manifest.__init__(self, opener)
bundlerevlog.__init__(self, opener, self.indexfile, bundle,
linkmapper)
class bundlefilelog(bundlerevlog, filelog.filelog):
def __init__(self, opener, path, bundle, linkmapper, repo):
filelog.filelog.__init__(self, opener, path)
bundlerevlog.__init__(self, opener, self.indexfile, bundle,
linkmapper)
self._repo = repo
def _file(self, f):
self._repo.file(f)
class bundlerepository(localrepo.localrepository):
def __init__(self, ui, path, bundlename):
self._tempparent = None
try:
localrepo.localrepository.__init__(self, ui, path)
except error.RepoError:
self._tempparent = tempfile.mkdtemp()
localrepo.instance(ui, self._tempparent, 1)
localrepo.localrepository.__init__(self, ui, self._tempparent)
if path:
self._url = 'bundle:' + util.expandpath(path) + '+' + bundlename
else:
self._url = 'bundle:' + bundlename
self.tempfile = None
f = util.posixfile(bundlename, "rb")
self.bundle = changegroup.readbundle(f, bundlename)
if self.bundle.compressed():
fdtemp, temp = tempfile.mkstemp(prefix="hg-bundle-",
suffix=".hg10un", dir=self.path)
self.tempfile = temp
fptemp = os.fdopen(fdtemp, 'wb')
try:
fptemp.write("HG10UN")
while True:
chunk = self.bundle.read(2**18)
if not chunk:
break
fptemp.write(chunk)
finally:
fptemp.close()
f = util.posixfile(self.tempfile, "rb")
self.bundle = changegroup.readbundle(f, bundlename)
# dict with the mapping 'filename' -> position in the bundle
self.bundlefilespos = {}
@util.propertycache
def changelog(self):
# consume the header if it exists
self.bundle.changelogheader()
c = bundlechangelog(self.sopener, self.bundle)
self.manstart = self.bundle.tell()
return c
@util.propertycache
def manifest(self):
self.bundle.seek(self.manstart)
# consume the header if it exists
self.bundle.manifestheader()
m = bundlemanifest(self.sopener, self.bundle, self.changelog.rev)
self.filestart = self.bundle.tell()
return m
@util.propertycache
def manstart(self):
self.changelog
return self.manstart
@util.propertycache
def filestart(self):
self.manifest
return self.filestart
def url(self):
return self._url
def file(self, f):
if not self.bundlefilespos:
self.bundle.seek(self.filestart)
while True:
chunkdata = self.bundle.filelogheader()
if not chunkdata:
break
fname = chunkdata['filename']
self.bundlefilespos[fname] = self.bundle.tell()
while True:
c = self.bundle.deltachunk(None)
if not c:
break
if f[0] == '/':
f = f[1:]
if f in self.bundlefilespos:
self.bundle.seek(self.bundlefilespos[f])
return bundlefilelog(self.sopener, f, self.bundle,
self.changelog.rev, self)
else:
return filelog.filelog(self.sopener, f)
def close(self):
"""Close assigned bundle file immediately."""
self.bundle.close()
if self.tempfile is not None:
os.unlink(self.tempfile)
if self._tempparent:
shutil.rmtree(self._tempparent, True)
def cancopy(self):
return False
def getcwd(self):
return os.getcwd() # always outside the repo
def instance(ui, path, create):
if create:
raise util.Abort(_('cannot create new bundle repository'))
parentpath = ui.config("bundle", "mainreporoot", "")
if parentpath:
# Try to make the full path relative so we get a nice, short URL.
# In particular, we don't want temp dir names in test outputs.
cwd = os.getcwd()
if parentpath == cwd:
parentpath = ''
else:
cwd = os.path.join(cwd,'')
if parentpath.startswith(cwd):
parentpath = parentpath[len(cwd):]
u = util.url(path)
path = u.localpath()
if u.scheme == 'bundle':
s = path.split("+", 1)
if len(s) == 1:
repopath, bundlename = parentpath, s[0]
else:
repopath, bundlename = s
else:
repopath, bundlename = parentpath, path
return bundlerepository(ui, repopath, bundlename)
def getremotechanges(ui, repo, other, onlyheads=None, bundlename=None,
force=False):
'''obtains a bundle of changes incoming from other
"onlyheads" restricts the returned changes to those reachable from the
specified heads.
"bundlename", if given, stores the bundle to this file path permanently;
otherwise it's stored to a temp file and gets deleted again when you call
the returned "cleanupfn".
"force" indicates whether to proceed on unrelated repos.
Returns a tuple (local, csets, cleanupfn):
"local" is a local repo from which to obtain the actual incoming changesets; it
is a bundlerepo for the obtained bundle when the original "other" is remote.
"csets" lists the incoming changeset node ids.
"cleanupfn" must be called without arguments when you're done processing the
changes; it closes both the original "other" and the one returned here.
'''
tmp = discovery.findcommonincoming(repo, other, heads=onlyheads, force=force)
common, incoming, rheads = tmp
if not incoming:
try:
if bundlename:
os.unlink(bundlename)
except OSError:
pass
return other, [], other.close
bundle = None
bundlerepo = None
localrepo = other
if bundlename or not other.local():
# create a bundle (uncompressed if other repo is not local)
if other.capable('getbundle'):
cg = other.getbundle('incoming', common=common, heads=rheads)
elif onlyheads is None and not other.capable('changegroupsubset'):
# compat with older servers when pulling all remote heads
cg = other.changegroup(incoming, "incoming")
rheads = None
else:
cg = other.changegroupsubset(incoming, rheads, 'incoming')
bundletype = other.local() and "HG10BZ" or "HG10UN"
fname = bundle = changegroup.writebundle(cg, bundlename, bundletype)
# keep written bundle?
if bundlename:
bundle = None
if not other.local():
# use the created uncompressed bundlerepo
localrepo = bundlerepo = bundlerepository(ui, repo.root, fname)
# this repo contains local and other now, so filter out local again
common = repo.heads()
csets = localrepo.changelog.findmissing(common, rheads)
def cleanup():
if bundlerepo:
bundlerepo.close()
if bundle:
os.unlink(bundle)
other.close()
return (localrepo, csets, cleanup)