Fix inconsistency for the stream_out capability in hgweb
During some experiments of mine, the uncompressed cloning could not
be enabled for hgweb.cgi nor hgwebdir.cgi though the server claimed
to be stream_out capable.
The only solution was to enable it using the user's .hgrc file.
This solution is not acceptable when publishing the repos through
an HTTP server because the CGI runs as a www dedicated user whose's
home hgrc file may not be accessible to users publishing their repos
through their userdir.
For such cases we could end up with this typical debug output:
hg --debug clone --uncompressed http://server/hg/project
destination directory: project
sending capabilities command
capabilities: lookup changegroupsubset stream=1
unbundle=HG10GZ,HG10BZ,HG10UN
sending stream_out command
abort: operation forbidden by server
The error lies in the fact the hgweb object defines new accessors
to the repo configuration that trust things by default (untrusted=True)
but the streamclone:stream_out function uses the usual accessors to the
repo.ui object, which do not trust by default (untrusted=False)
Fix this inconsistency, adding a new parameter to the stream_out function.
hgweb then forces a "trust by default" behavior.
# manifest.py - manifest revision class for mercurial
#
# Copyright 2005-2007 Matt Mackall <mpm@selenic.com>
#
# This software may be used and distributed according to the terms
# of the GNU General Public License, incorporated herein by reference.
from revlog import *
from i18n import _
import array, bisect, struct, mdiff
class manifestdict(dict):
def __init__(self, mapping=None, flags=None):
if mapping is None: mapping = {}
if flags is None: flags = {}
dict.__init__(self, mapping)
self._flags = flags
def flags(self, f):
return self._flags.get(f, "")
def execf(self, f):
"test for executable in manifest flags"
return "x" in self.flags(f)
def linkf(self, f):
"test for symlink in manifest flags"
return "l" in self.flags(f)
def rawset(self, f, entry):
self[f] = bin(entry[:40])
fl = entry[40:-1]
if fl: self._flags[f] = fl
def set(self, f, execf=False, linkf=False):
if linkf: self._flags[f] = "l"
elif execf: self._flags[f] = "x"
else: self._flags[f] = ""
def copy(self):
return manifestdict(dict.copy(self), dict.copy(self._flags))
class manifest(revlog):
def __init__(self, opener):
self.mapcache = None
self.listcache = None
revlog.__init__(self, opener, "00manifest.i")
def parselines(self, lines):
for l in lines.splitlines(1):
yield l.split('\0')
def readdelta(self, node):
delta = mdiff.patchtext(self.delta(node))
deltamap = manifestdict()
for f, n in self.parselines(delta):
deltamap.rawset(f, n)
return deltamap
def read(self, node):
if node == nullid: return manifestdict() # don't upset local cache
if self.mapcache and self.mapcache[0] == node:
return self.mapcache[1]
text = self.revision(node)
self.listcache = array.array('c', text)
mapping = manifestdict()
for f, n in self.parselines(text):
mapping.rawset(f, n)
self.mapcache = (node, mapping)
return mapping
def _search(self, m, s, lo=0, hi=None):
'''return a tuple (start, end) that says where to find s within m.
If the string is found m[start:end] are the line containing
that string. If start == end the string was not found and
they indicate the proper sorted insertion point. This was
taken from bisect_left, and modified to find line start/end as
it goes along.
m should be a buffer or a string
s is a string'''
def advance(i, c):
while i < lenm and m[i] != c:
i += 1
return i
lenm = len(m)
if not hi:
hi = lenm
while lo < hi:
mid = (lo + hi) // 2
start = mid
while start > 0 and m[start-1] != '\n':
start -= 1
end = advance(start, '\0')
if m[start:end] < s:
# we know that after the null there are 40 bytes of sha1
# this translates to the bisect lo = mid + 1
lo = advance(end + 40, '\n') + 1
else:
# this translates to the bisect hi = mid
hi = start
end = advance(lo, '\0')
found = m[lo:end]
if cmp(s, found) == 0:
# we know that after the null there are 40 bytes of sha1
end = advance(end + 40, '\n')
return (lo, end+1)
else:
return (lo, lo)
def find(self, node, f):
'''look up entry for a single file efficiently.
return (node, flags) pair if found, (None, None) if not.'''
if self.mapcache and node == self.mapcache[0]:
return self.mapcache[1].get(f), self.mapcache[1].flags(f)
text = self.revision(node)
start, end = self._search(text, f)
if start == end:
return None, None
l = text[start:end]
f, n = l.split('\0')
return bin(n[:40]), n[40:-1]
def add(self, map, transaction, link, p1=None, p2=None,
changed=None):
# apply the changes collected during the bisect loop to our addlist
# return a delta suitable for addrevision
def addlistdelta(addlist, x):
# start from the bottom up
# so changes to the offsets don't mess things up.
i = len(x)
while i > 0:
i -= 1
start = x[i][0]
end = x[i][1]
if x[i][2]:
addlist[start:end] = array.array('c', x[i][2])
else:
del addlist[start:end]
return "".join([struct.pack(">lll", d[0], d[1], len(d[2])) + d[2]
for d in x ])
def checkforbidden(f):
if '\n' in f or '\r' in f:
raise RevlogError(_("'\\n' and '\\r' disallowed in filenames"))
# if we're using the listcache, make sure it is valid and
# parented by the same node we're diffing against
if not (changed and self.listcache and p1 and self.mapcache[0] == p1):
files = map.keys()
files.sort()
for f in files:
checkforbidden(f)
# if this is changed to support newlines in filenames,
# be sure to check the templates/ dir again (especially *-raw.tmpl)
text = ["%s\000%s%s\n" % (f, hex(map[f]), map.flags(f))
for f in files]
self.listcache = array.array('c', "".join(text))
cachedelta = None
else:
addlist = self.listcache
for f in changed[0]:
checkforbidden(f)
# combine the changed lists into one list for sorting
work = [[x, 0] for x in changed[0]]
work[len(work):] = [[x, 1] for x in changed[1]]
work.sort()
delta = []
dstart = None
dend = None
dline = [""]
start = 0
# zero copy representation of addlist as a buffer
addbuf = buffer(addlist)
# start with a readonly loop that finds the offset of
# each line and creates the deltas
for w in work:
f = w[0]
# bs will either be the index of the item or the insert point
start, end = self._search(addbuf, f, start)
if w[1] == 0:
l = "%s\000%s%s\n" % (f, hex(map[f]), map.flags(f))
else:
l = ""
if start == end and w[1] == 1:
# item we want to delete was not found, error out
raise AssertionError(
_("failed to remove %s from manifest") % f)
if dstart != None and dstart <= start and dend >= start:
if dend < end:
dend = end
if l:
dline.append(l)
else:
if dstart != None:
delta.append([dstart, dend, "".join(dline)])
dstart = start
dend = end
dline = [l]
if dstart != None:
delta.append([dstart, dend, "".join(dline)])
# apply the delta to the addlist, and get a delta for addrevision
cachedelta = addlistdelta(addlist, delta)
# the delta is only valid if we've been processing the tip revision
if self.mapcache[0] != self.tip():
cachedelta = None
self.listcache = addlist
n = self.addrevision(buffer(self.listcache), transaction, link,
p1, p2, cachedelta)
self.mapcache = (n, map)
return n