/usr/share/pyshared/mercurial/manifest.py is in mercurial-common 2.0.2-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 | # 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 version 2 or any later version.
from i18n import _
import mdiff, parsers, error, revlog
import array, struct
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 set(self, f, flags):
self._flags[f] = flags
def copy(self):
return manifestdict(self, dict.copy(self._flags))
class manifest(revlog.revlog):
def __init__(self, opener):
self._mancache = None
revlog.revlog.__init__(self, opener, "00manifest.i")
def parse(self, lines):
mfdict = manifestdict()
parsers.parse_manifest(mfdict, mfdict._flags, lines)
return mfdict
def readdelta(self, node):
r = self.rev(node)
return self.parse(mdiff.patchtext(self.revdiff(self.deltaparent(r), r)))
def readfast(self, node):
'''use the faster of readdelta or read'''
r = self.rev(node)
deltaparent = self.deltaparent(r)
if deltaparent != revlog.nullrev and deltaparent in self.parentrevs(r):
return self.readdelta(node)
return self.read(node)
def read(self, node):
if node == revlog.nullid:
return manifestdict() # don't upset local cache
if self._mancache and self._mancache[0] == node:
return self._mancache[1]
text = self.revision(node)
arraytext = array.array('c', text)
mapping = self.parse(text)
self._mancache = (node, mapping, arraytext)
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
if not s:
return (lo, lo)
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 s == found:
# 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._mancache and self._mancache[0] == node:
return self._mancache[1].get(f), self._mancache[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 revlog.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.
for start, end, content in reversed(x):
if content:
addlist[start:end] = array.array('c', content)
else:
del addlist[start:end]
return "".join(struct.pack(">lll", start, end, len(content)) + content
for start, end, content in x)
def checkforbidden(l):
for f in l:
if '\n' in f or '\r' in f:
raise error.RevlogError(
_("'\\n' and '\\r' disallowed in filenames: %r") % f)
# if we're using the cache, make sure it is valid and
# parented by the same node we're diffing against
if not (changed and self._mancache and p1 and self._mancache[0] == p1):
files = sorted(map)
checkforbidden(files)
# if this is changed to support newlines in filenames,
# be sure to check the templates/ dir again (especially *-raw.tmpl)
hex, flags = revlog.hex, map.flags
text = ''.join("%s\0%s%s\n" % (f, hex(map[f]), flags(f))
for f in files)
arraytext = array.array('c', text)
cachedelta = None
else:
added, removed = changed
addlist = self._mancache[2]
checkforbidden(added)
# combine the changed lists into one list for sorting
work = [(x, False) for x in added]
work.extend((x, True) for x in removed)
# this could use heapq.merge() (from python2.6+) or equivalent
# since the lists are already sorted
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 f, todelete in work:
# bs will either be the index of the item or the insert point
start, end = self._search(addbuf, f, start)
if not todelete:
l = "%s\0%s%s\n" % (f, revlog.hex(map[f]), map.flags(f))
else:
if start == end:
# item we want to delete was not found, error out
raise AssertionError(
_("failed to remove %s from manifest") % f)
l = ""
if dstart is not None and dstart <= start and dend >= start:
if dend < end:
dend = end
if l:
dline.append(l)
else:
if dstart is not None:
delta.append([dstart, dend, "".join(dline)])
dstart = start
dend = end
dline = [l]
if dstart is not None:
delta.append([dstart, dend, "".join(dline)])
# apply the delta to the addlist, and get a delta for addrevision
cachedelta = (self.rev(p1), addlistdelta(addlist, delta))
arraytext = addlist
text = buffer(arraytext)
n = self.addrevision(text, transaction, link, p1, p2, cachedelta)
self._mancache = (n, map, arraytext)
return n
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