Make bundlerepo use proper index format for revlogng
bundlerepo just appends index entries from the bundle onto the index for the
current repo. This patch makes sure it appends the correct format.
"""
bundlerepo.py - repository class for viewing uncompressed bundles
This provides a read-only repository interface to bundles as if
they were part of the actual repository.
Copyright 2006 Benoit Boissinot <benoit.boissinot@ens-lyon.org>
This software may be used and distributed according to the terms
of the GNU General Public License, incorporated herein by reference.
"""
from node import *
from i18n import gettext as _
from demandload import demandload
demandload(globals(), "changegroup util os struct")
import localrepo, changelog, manifest, filelog, revlog
class bundlerevlog(revlog.revlog):
def __init__(self, opener, indexfile, datafile, bundlefile,
linkmapper=None):
# How it works:
# to retrieve a revision, we need to know the offset of
# the revision in the bundlefile (an opened file).
#
# 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, datafile)
self.bundlefile = bundlefile
self.basemap = {}
def chunkpositer():
for chunk in changegroup.chunkiter(bundlefile):
pos = bundlefile.tell()
yield chunk, pos - len(chunk)
n = self.count()
prev = None
for chunk, start in chunkpositer():
size = len(chunk)
if size < 80:
raise util.Abort("invalid changegroup")
start += 80
size -= 80
node, p1, p2, cs = struct.unpack("20s20s20s20s", chunk[:80])
if node in self.nodemap:
prev = node
continue
for p in (p1, p2):
if not p in self.nodemap:
raise RevlogError(_("unknown parent %s") % short(p1))
if linkmapper is None:
link = n
else:
link = linkmapper(cs)
if not prev:
prev = p1
# start, size, base is not used, link, p1, p2, delta ref
if self.version == 0:
e = (start, size, None, link, p1, p2, node)
else:
e = (self.offset_type(start, 0), size, -1, None, link,
self.rev(p1), self.rev(p2), node)
self.basemap[n] = prev
self.index.append(e)
self.nodemap[node] = n
prev = node
n += 1
def bundle(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, df=None):
# Warning: in case of bundle, the diff is against bundlebase,
# not against rev - 1
# XXX: could use some caching
if not self.bundle(rev):
return revlog.revlog.chunk(self, rev)
self.bundlefile.seek(self.start(rev))
return self.bundlefile.read(self.length(rev))
def revdiff(self, rev1, rev2):
"""return or calculate a delta between two revisions"""
if self.bundle(rev1) and self.bundle(rev2):
# hot path for bundle
revb = self.rev(self.bundlebase(rev2))
if revb == rev1:
return self.chunk(rev2)
elif not self.bundle(rev1) and not self.bundle(rev2):
return revlog.revlog.chunk(self, rev1, rev2)
return self.diff(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.bundle(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 = self.patches(text, [delta])
p1, p2 = self.parents(node)
if node != revlog.hash(text, p1, p2):
raise RevlogError(_("integrity check failed on %s:%d")
% (self.datafile, self.rev(node)))
self.cache = (node, rev, text)
return text
def addrevision(self, text, transaction, link, p1=None, p2=None, d=None):
raise NotImplementedError
def addgroup(self, revs, linkmapper, transaction, unique=0):
raise NotImplementedError
def strip(self, rev, minlink):
raise NotImplementedError
def checksize(self):
raise NotImplementedError
class bundlechangelog(bundlerevlog, changelog.changelog):
def __init__(self, opener, bundlefile):
changelog.changelog.__init__(self, opener)
bundlerevlog.__init__(self, opener, "00changelog.i", "00changelog.d",
bundlefile)
class bundlemanifest(bundlerevlog, manifest.manifest):
def __init__(self, opener, bundlefile, linkmapper):
manifest.manifest.__init__(self, opener)
bundlerevlog.__init__(self, opener, self.indexfile, self.datafile,
bundlefile, linkmapper)
class bundlefilelog(bundlerevlog, filelog.filelog):
def __init__(self, opener, path, bundlefile, linkmapper):
filelog.filelog.__init__(self, opener, path)
bundlerevlog.__init__(self, opener, self.indexfile, self.datafile,
bundlefile, linkmapper)
class bundlerepository(localrepo.localrepository):
def __init__(self, ui, path, bundlename):
localrepo.localrepository.__init__(self, ui, path)
f = open(bundlename, "rb")
s = os.fstat(f.fileno())
self.bundlefile = f
header = self.bundlefile.read(6)
if not header.startswith("HG"):
raise util.Abort(_("%s: not a Mercurial bundle file") % bundlename)
elif not header.startswith("HG10"):
raise util.Abort(_("%s: unknown bundle version") % bundlename)
elif header == "HG10BZ":
raise util.Abort(_("%s: compressed bundle not supported")
% bundlename)
elif header == "HG10UN":
# uncompressed bundle supported
pass
else:
raise util.Abort(_("%s: unknown bundle compression type")
% bundlename)
self.changelog = bundlechangelog(self.opener, self.bundlefile)
self.manifest = bundlemanifest(self.opener, self.bundlefile,
self.changelog.rev)
# dict with the mapping 'filename' -> position in the bundle
self.bundlefilespos = {}
while 1:
f = changegroup.getchunk(self.bundlefile)
if not f:
break
self.bundlefilespos[f] = self.bundlefile.tell()
for c in changegroup.chunkiter(self.bundlefile):
pass
def dev(self):
return -1
def file(self, f):
if f[0] == '/':
f = f[1:]
if f in self.bundlefilespos:
self.bundlefile.seek(self.bundlefilespos[f])
return bundlefilelog(self.opener, f, self.bundlefile,
self.changelog.rev)
else:
return filelog.filelog(self.opener, f)
def close(self):
"""Close assigned bundle file immediately."""
self.bundlefile.close()