|
|
"""
|
|
|
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
|
|
|
e = (start, size, None, link, p1, 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()
|
|
|
|
