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.
# mdiff.py - diff and patch routines for mercurial
#
# Copyright 2005, 2006 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.
import bdiff, mpatch, re, struct, util, md5
def splitnewlines(text):
'''like str.splitlines, but only split on newlines.'''
lines = [l + '\n' for l in text.split('\n')]
if lines:
if lines[-1] == '\n':
lines.pop()
else:
lines[-1] = lines[-1][:-1]
return lines
class diffopts(object):
'''context is the number of context lines
text treats all files as text
showfunc enables diff -p output
git enables the git extended patch format
nodates removes dates from diff headers
ignorews ignores all whitespace changes in the diff
ignorewsamount ignores changes in the amount of whitespace
ignoreblanklines ignores changes whose lines are all blank'''
defaults = {
'context': 3,
'text': False,
'showfunc': True,
'git': False,
'nodates': False,
'ignorews': False,
'ignorewsamount': False,
'ignoreblanklines': False,
}
__slots__ = defaults.keys()
def __init__(self, **opts):
for k in self.__slots__:
v = opts.get(k)
if v is None:
v = self.defaults[k]
setattr(self, k, v)
defaultopts = diffopts()
def unidiff(a, ad, b, bd, fn, r=None, opts=defaultopts):
def datetag(date, addtab=True):
if not opts.git and not opts.nodates:
return '\t%s\n' % date
if addtab and ' ' in fn:
return '\t\n'
return '\n'
if not a and not b: return ""
epoch = util.datestr((0, 0))
if not opts.text and (util.binary(a) or util.binary(b)):
def h(v):
# md5 is used instead of sha1 because md5 is supposedly faster
return md5.new(v).digest()
if a and b and len(a) == len(b) and h(a) == h(b):
return ""
l = ['Binary file %s has changed\n' % fn]
elif not a:
b = splitnewlines(b)
if a is None:
l1 = '--- /dev/null%s' % datetag(epoch, False)
else:
l1 = "--- %s%s" % ("a/" + fn, datetag(ad))
l2 = "+++ %s%s" % ("b/" + fn, datetag(bd))
l3 = "@@ -0,0 +1,%d @@\n" % len(b)
l = [l1, l2, l3] + ["+" + e for e in b]
elif not b:
a = splitnewlines(a)
l1 = "--- %s%s" % ("a/" + fn, datetag(ad))
if b is None:
l2 = '+++ /dev/null%s' % datetag(epoch, False)
else:
l2 = "+++ %s%s" % ("b/" + fn, datetag(bd))
l3 = "@@ -1,%d +0,0 @@\n" % len(a)
l = [l1, l2, l3] + ["-" + e for e in a]
else:
al = splitnewlines(a)
bl = splitnewlines(b)
l = list(bunidiff(a, b, al, bl, "a/" + fn, "b/" + fn, opts=opts))
if not l: return ""
# difflib uses a space, rather than a tab
l[0] = "%s%s" % (l[0][:-2], datetag(ad))
l[1] = "%s%s" % (l[1][:-2], datetag(bd))
for ln in xrange(len(l)):
if l[ln][-1] != '\n':
l[ln] += "\n\ No newline at end of file\n"
if r:
l.insert(0, "diff %s %s\n" %
(' '.join(["-r %s" % rev for rev in r]), fn))
return "".join(l)
# somewhat self contained replacement for difflib.unified_diff
# t1 and t2 are the text to be diffed
# l1 and l2 are the text broken up into lines
# header1 and header2 are the filenames for the diff output
def bunidiff(t1, t2, l1, l2, header1, header2, opts=defaultopts):
def contextend(l, len):
ret = l + opts.context
if ret > len:
ret = len
return ret
def contextstart(l):
ret = l - opts.context
if ret < 0:
return 0
return ret
def yieldhunk(hunk, header):
if header:
for x in header:
yield x
(astart, a2, bstart, b2, delta) = hunk
aend = contextend(a2, len(l1))
alen = aend - astart
blen = b2 - bstart + aend - a2
func = ""
if opts.showfunc:
# walk backwards from the start of the context
# to find a line starting with an alphanumeric char.
for x in xrange(astart, -1, -1):
t = l1[x].rstrip()
if funcre.match(t):
func = ' ' + t[:40]
break
yield "@@ -%d,%d +%d,%d @@%s\n" % (astart + 1, alen,
bstart + 1, blen, func)
for x in delta:
yield x
for x in xrange(a2, aend):
yield ' ' + l1[x]
header = [ "--- %s\t\n" % header1, "+++ %s\t\n" % header2 ]
if opts.showfunc:
funcre = re.compile('\w')
if opts.ignorewsamount:
wsamountre = re.compile('[ \t]+')
wsappendedre = re.compile(' \n')
if opts.ignoreblanklines:
wsblanklinesre = re.compile('\n')
if opts.ignorews:
wsre = re.compile('[ \t]')
# bdiff.blocks gives us the matching sequences in the files. The loop
# below finds the spaces between those matching sequences and translates
# them into diff output.
#
diff = bdiff.blocks(t1, t2)
hunk = None
for i in xrange(len(diff)):
# The first match is special.
# we've either found a match starting at line 0 or a match later
# in the file. If it starts later, old and new below will both be
# empty and we'll continue to the next match.
if i > 0:
s = diff[i-1]
else:
s = [0, 0, 0, 0]
delta = []
s1 = diff[i]
a1 = s[1]
a2 = s1[0]
b1 = s[3]
b2 = s1[2]
old = l1[a1:a2]
new = l2[b1:b2]
# bdiff sometimes gives huge matches past eof, this check eats them,
# and deals with the special first match case described above
if not old and not new:
continue
if opts.ignoreblanklines:
wsold = wsblanklinesre.sub('', "".join(old))
wsnew = wsblanklinesre.sub('', "".join(new))
if wsold == wsnew:
continue
if opts.ignorewsamount:
wsold = wsamountre.sub(' ', "".join(old))
wsold = wsappendedre.sub('\n', wsold)
wsnew = wsamountre.sub(' ', "".join(new))
wsnew = wsappendedre.sub('\n', wsnew)
if wsold == wsnew:
continue
if opts.ignorews:
wsold = wsre.sub('', "".join(old))
wsnew = wsre.sub('', "".join(new))
if wsold == wsnew:
continue
astart = contextstart(a1)
bstart = contextstart(b1)
prev = None
if hunk:
# join with the previous hunk if it falls inside the context
if astart < hunk[1] + opts.context + 1:
prev = hunk
astart = hunk[1]
bstart = hunk[3]
else:
for x in yieldhunk(hunk, header):
yield x
# we only want to yield the header if the files differ, and
# we only want to yield it once.
header = None
if prev:
# we've joined the previous hunk, record the new ending points.
hunk[1] = a2
hunk[3] = b2
delta = hunk[4]
else:
# create a new hunk
hunk = [ astart, a2, bstart, b2, delta ]
delta[len(delta):] = [ ' ' + x for x in l1[astart:a1] ]
delta[len(delta):] = [ '-' + x for x in old ]
delta[len(delta):] = [ '+' + x for x in new ]
if hunk:
for x in yieldhunk(hunk, header):
yield x
def patchtext(bin):
pos = 0
t = []
while pos < len(bin):
p1, p2, l = struct.unpack(">lll", bin[pos:pos + 12])
pos += 12
t.append(bin[pos:pos + l])
pos += l
return "".join(t)
def patch(a, bin):
return mpatch.patches(a, [bin])
# similar to difflib.SequenceMatcher.get_matching_blocks
def get_matching_blocks(a, b):
return [(d[0], d[2], d[1] - d[0]) for d in bdiff.blocks(a, b)]
patches = mpatch.patches
patchedsize = mpatch.patchedsize
textdiff = bdiff.bdiff