manifest: fix out-of-bounds read of corrupted manifest entry
Spotted by ASAN.
# match.py - filename matching
#
# Copyright 2008, 2009 Matt Mackall <mpm@selenic.com> and others
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
from __future__ import absolute_import, print_function
import copy
import os
import re
from .i18n import _
from . import (
encoding,
error,
pathutil,
pycompat,
util,
)
from .utils import (
stringutil,
)
allpatternkinds = ('re', 'glob', 'path', 'relglob', 'relpath', 'relre',
'listfile', 'listfile0', 'set', 'include', 'subinclude',
'rootfilesin')
cwdrelativepatternkinds = ('relpath', 'glob')
propertycache = util.propertycache
def _rematcher(regex):
'''compile the regexp with the best available regexp engine and return a
matcher function'''
m = util.re.compile(regex)
try:
# slightly faster, provided by facebook's re2 bindings
return m.test_match
except AttributeError:
return m.match
def _expandsets(root, cwd, kindpats, ctx, listsubrepos, badfn):
'''Returns the kindpats list with the 'set' patterns expanded to matchers'''
matchers = []
other = []
for kind, pat, source in kindpats:
if kind == 'set':
if not ctx:
raise error.ProgrammingError("fileset expression with no "
"context")
matchers.append(ctx.matchfileset(pat, badfn=badfn))
if listsubrepos:
for subpath in ctx.substate:
sm = ctx.sub(subpath).matchfileset(pat, badfn=badfn)
pm = prefixdirmatcher(root, cwd, subpath, sm, badfn=badfn)
matchers.append(pm)
continue
other.append((kind, pat, source))
return matchers, other
def _expandsubinclude(kindpats, root):
'''Returns the list of subinclude matcher args and the kindpats without the
subincludes in it.'''
relmatchers = []
other = []
for kind, pat, source in kindpats:
if kind == 'subinclude':
sourceroot = pathutil.dirname(util.normpath(source))
pat = util.pconvert(pat)
path = pathutil.join(sourceroot, pat)
newroot = pathutil.dirname(path)
matcherargs = (newroot, '', [], ['include:%s' % path])
prefix = pathutil.canonpath(root, root, newroot)
if prefix:
prefix += '/'
relmatchers.append((prefix, matcherargs))
else:
other.append((kind, pat, source))
return relmatchers, other
def _kindpatsalwaysmatch(kindpats):
""""Checks whether the kindspats match everything, as e.g.
'relpath:.' does.
"""
for kind, pat, source in kindpats:
if pat != '' or kind not in ['relpath', 'glob']:
return False
return True
def _buildkindpatsmatcher(matchercls, root, cwd, kindpats, ctx=None,
listsubrepos=False, badfn=None):
matchers = []
fms, kindpats = _expandsets(root, cwd, kindpats, ctx=ctx,
listsubrepos=listsubrepos, badfn=badfn)
if kindpats:
m = matchercls(root, cwd, kindpats, listsubrepos=listsubrepos,
badfn=badfn)
matchers.append(m)
if fms:
matchers.extend(fms)
if not matchers:
return nevermatcher(root, cwd, badfn=badfn)
if len(matchers) == 1:
return matchers[0]
return unionmatcher(matchers)
def match(root, cwd, patterns=None, include=None, exclude=None, default='glob',
exact=False, auditor=None, ctx=None, listsubrepos=False, warn=None,
badfn=None, icasefs=False):
"""build an object to match a set of file patterns
arguments:
root - the canonical root of the tree you're matching against
cwd - the current working directory, if relevant
patterns - patterns to find
include - patterns to include (unless they are excluded)
exclude - patterns to exclude (even if they are included)
default - if a pattern in patterns has no explicit type, assume this one
exact - patterns are actually filenames (include/exclude still apply)
warn - optional function used for printing warnings
badfn - optional bad() callback for this matcher instead of the default
icasefs - make a matcher for wdir on case insensitive filesystems, which
normalizes the given patterns to the case in the filesystem
a pattern is one of:
'glob:<glob>' - a glob relative to cwd
're:<regexp>' - a regular expression
'path:<path>' - a path relative to repository root, which is matched
recursively
'rootfilesin:<path>' - a path relative to repository root, which is
matched non-recursively (will not match subdirectories)
'relglob:<glob>' - an unrooted glob (*.c matches C files in all dirs)
'relpath:<path>' - a path relative to cwd
'relre:<regexp>' - a regexp that needn't match the start of a name
'set:<fileset>' - a fileset expression
'include:<path>' - a file of patterns to read and include
'subinclude:<path>' - a file of patterns to match against files under
the same directory
'<something>' - a pattern of the specified default type
"""
normalize = _donormalize
if icasefs:
if exact:
raise error.ProgrammingError("a case-insensitive exact matcher "
"doesn't make sense")
dirstate = ctx.repo().dirstate
dsnormalize = dirstate.normalize
def normalize(patterns, default, root, cwd, auditor, warn):
kp = _donormalize(patterns, default, root, cwd, auditor, warn)
kindpats = []
for kind, pats, source in kp:
if kind not in ('re', 'relre'): # regex can't be normalized
p = pats
pats = dsnormalize(pats)
# Preserve the original to handle a case only rename.
if p != pats and p in dirstate:
kindpats.append((kind, p, source))
kindpats.append((kind, pats, source))
return kindpats
if exact:
m = exactmatcher(root, cwd, patterns, badfn)
elif patterns:
kindpats = normalize(patterns, default, root, cwd, auditor, warn)
if _kindpatsalwaysmatch(kindpats):
m = alwaysmatcher(root, cwd, badfn, relativeuipath=True)
else:
m = _buildkindpatsmatcher(patternmatcher, root, cwd, kindpats,
ctx=ctx, listsubrepos=listsubrepos,
badfn=badfn)
else:
# It's a little strange that no patterns means to match everything.
# Consider changing this to match nothing (probably using nevermatcher).
m = alwaysmatcher(root, cwd, badfn)
if include:
kindpats = normalize(include, 'glob', root, cwd, auditor, warn)
im = _buildkindpatsmatcher(includematcher, root, cwd, kindpats, ctx=ctx,
listsubrepos=listsubrepos, badfn=None)
m = intersectmatchers(m, im)
if exclude:
kindpats = normalize(exclude, 'glob', root, cwd, auditor, warn)
em = _buildkindpatsmatcher(includematcher, root, cwd, kindpats, ctx=ctx,
listsubrepos=listsubrepos, badfn=None)
m = differencematcher(m, em)
return m
def exact(root, cwd, files, badfn=None):
return exactmatcher(root, cwd, files, badfn=badfn)
def always(root, cwd):
return alwaysmatcher(root, cwd)
def never(root, cwd):
return nevermatcher(root, cwd)
def badmatch(match, badfn):
"""Make a copy of the given matcher, replacing its bad method with the given
one.
"""
m = copy.copy(match)
m.bad = badfn
return m
def _donormalize(patterns, default, root, cwd, auditor, warn):
'''Convert 'kind:pat' from the patterns list to tuples with kind and
normalized and rooted patterns and with listfiles expanded.'''
kindpats = []
for kind, pat in [_patsplit(p, default) for p in patterns]:
if kind in cwdrelativepatternkinds:
pat = pathutil.canonpath(root, cwd, pat, auditor)
elif kind in ('relglob', 'path', 'rootfilesin'):
pat = util.normpath(pat)
elif kind in ('listfile', 'listfile0'):
try:
files = util.readfile(pat)
if kind == 'listfile0':
files = files.split('\0')
else:
files = files.splitlines()
files = [f for f in files if f]
except EnvironmentError:
raise error.Abort(_("unable to read file list (%s)") % pat)
for k, p, source in _donormalize(files, default, root, cwd,
auditor, warn):
kindpats.append((k, p, pat))
continue
elif kind == 'include':
try:
fullpath = os.path.join(root, util.localpath(pat))
includepats = readpatternfile(fullpath, warn)
for k, p, source in _donormalize(includepats, default,
root, cwd, auditor, warn):
kindpats.append((k, p, source or pat))
except error.Abort as inst:
raise error.Abort('%s: %s' % (pat, inst[0]))
except IOError as inst:
if warn:
warn(_("skipping unreadable pattern file '%s': %s\n") %
(pat, stringutil.forcebytestr(inst.strerror)))
continue
# else: re or relre - which cannot be normalized
kindpats.append((kind, pat, ''))
return kindpats
class basematcher(object):
def __init__(self, root, cwd, badfn=None, relativeuipath=True):
self._root = root
self._cwd = cwd
if badfn is not None:
self.bad = badfn
self._relativeuipath = relativeuipath
def __call__(self, fn):
return self.matchfn(fn)
def __iter__(self):
for f in self._files:
yield f
# Callbacks related to how the matcher is used by dirstate.walk.
# Subscribers to these events must monkeypatch the matcher object.
def bad(self, f, msg):
'''Callback from dirstate.walk for each explicit file that can't be
found/accessed, with an error message.'''
# If an explicitdir is set, it will be called when an explicitly listed
# directory is visited.
explicitdir = None
# If an traversedir is set, it will be called when a directory discovered
# by recursive traversal is visited.
traversedir = None
def abs(self, f):
'''Convert a repo path back to path that is relative to the root of the
matcher.'''
return f
def rel(self, f):
'''Convert repo path back to path that is relative to cwd of matcher.'''
return util.pathto(self._root, self._cwd, f)
def uipath(self, f):
'''Convert repo path to a display path. If patterns or -I/-X were used
to create this matcher, the display path will be relative to cwd.
Otherwise it is relative to the root of the repo.'''
return (self._relativeuipath and self.rel(f)) or self.abs(f)
@propertycache
def _files(self):
return []
def files(self):
'''Explicitly listed files or patterns or roots:
if no patterns or .always(): empty list,
if exact: list exact files,
if not .anypats(): list all files and dirs,
else: optimal roots'''
return self._files
@propertycache
def _fileset(self):
return set(self._files)
def exact(self, f):
'''Returns True if f is in .files().'''
return f in self._fileset
def matchfn(self, f):
return False
def visitdir(self, dir):
'''Decides whether a directory should be visited based on whether it
has potential matches in it or one of its subdirectories. This is
based on the match's primary, included, and excluded patterns.
Returns the string 'all' if the given directory and all subdirectories
should be visited. Otherwise returns True or False indicating whether
the given directory should be visited.
'''
return True
def always(self):
'''Matcher will match everything and .files() will be empty --
optimization might be possible.'''
return False
def isexact(self):
'''Matcher will match exactly the list of files in .files() --
optimization might be possible.'''
return False
def prefix(self):
'''Matcher will match the paths in .files() recursively --
optimization might be possible.'''
return False
def anypats(self):
'''None of .always(), .isexact(), and .prefix() is true --
optimizations will be difficult.'''
return not self.always() and not self.isexact() and not self.prefix()
class alwaysmatcher(basematcher):
'''Matches everything.'''
def __init__(self, root, cwd, badfn=None, relativeuipath=False):
super(alwaysmatcher, self).__init__(root, cwd, badfn,
relativeuipath=relativeuipath)
def always(self):
return True
def matchfn(self, f):
return True
def visitdir(self, dir):
return 'all'
def __repr__(self):
return r'<alwaysmatcher>'
class nevermatcher(basematcher):
'''Matches nothing.'''
def __init__(self, root, cwd, badfn=None):
super(nevermatcher, self).__init__(root, cwd, badfn)
# It's a little weird to say that the nevermatcher is an exact matcher
# or a prefix matcher, but it seems to make sense to let callers take
# fast paths based on either. There will be no exact matches, nor any
# prefixes (files() returns []), so fast paths iterating over them should
# be efficient (and correct).
def isexact(self):
return True
def prefix(self):
return True
def visitdir(self, dir):
return False
def __repr__(self):
return r'<nevermatcher>'
class predicatematcher(basematcher):
"""A matcher adapter for a simple boolean function"""
def __init__(self, root, cwd, predfn, predrepr=None, badfn=None):
super(predicatematcher, self).__init__(root, cwd, badfn)
self.matchfn = predfn
self._predrepr = predrepr
@encoding.strmethod
def __repr__(self):
s = (stringutil.buildrepr(self._predrepr)
or pycompat.byterepr(self.matchfn))
return '<predicatenmatcher pred=%s>' % s
class patternmatcher(basematcher):
def __init__(self, root, cwd, kindpats, listsubrepos=False, badfn=None):
super(patternmatcher, self).__init__(root, cwd, badfn)
self._files = _explicitfiles(kindpats)
self._prefix = _prefix(kindpats)
self._pats, self.matchfn = _buildmatch(kindpats, '$', listsubrepos,
root)
@propertycache
def _dirs(self):
return set(util.dirs(self._fileset)) | {'.'}
def visitdir(self, dir):
if self._prefix and dir in self._fileset:
return 'all'
return ('.' in self._fileset or
dir in self._fileset or
dir in self._dirs or
any(parentdir in self._fileset
for parentdir in util.finddirs(dir)))
def prefix(self):
return self._prefix
@encoding.strmethod
def __repr__(self):
return ('<patternmatcher patterns=%r>' % pycompat.bytestr(self._pats))
class includematcher(basematcher):
def __init__(self, root, cwd, kindpats, listsubrepos=False, badfn=None):
super(includematcher, self).__init__(root, cwd, badfn)
self._pats, self.matchfn = _buildmatch(kindpats, '(?:/|$)',
listsubrepos, root)
self._prefix = _prefix(kindpats)
roots, dirs = _rootsanddirs(kindpats)
# roots are directories which are recursively included.
self._roots = set(roots)
# dirs are directories which are non-recursively included.
self._dirs = set(dirs)
def visitdir(self, dir):
if self._prefix and dir in self._roots:
return 'all'
return ('.' in self._roots or
dir in self._roots or
dir in self._dirs or
any(parentdir in self._roots
for parentdir in util.finddirs(dir)))
@encoding.strmethod
def __repr__(self):
return ('<includematcher includes=%r>' % pycompat.bytestr(self._pats))
class exactmatcher(basematcher):
'''Matches the input files exactly. They are interpreted as paths, not
patterns (so no kind-prefixes).
'''
def __init__(self, root, cwd, files, badfn=None):
super(exactmatcher, self).__init__(root, cwd, badfn)
if isinstance(files, list):
self._files = files
else:
self._files = list(files)
matchfn = basematcher.exact
@propertycache
def _dirs(self):
return set(util.dirs(self._fileset)) | {'.'}
def visitdir(self, dir):
return dir in self._dirs
def isexact(self):
return True
@encoding.strmethod
def __repr__(self):
return ('<exactmatcher files=%r>' % self._files)
class differencematcher(basematcher):
'''Composes two matchers by matching if the first matches and the second
does not.
The second matcher's non-matching-attributes (root, cwd, bad, explicitdir,
traversedir) are ignored.
'''
def __init__(self, m1, m2):
super(differencematcher, self).__init__(m1._root, m1._cwd)
self._m1 = m1
self._m2 = m2
self.bad = m1.bad
self.explicitdir = m1.explicitdir
self.traversedir = m1.traversedir
def matchfn(self, f):
return self._m1(f) and not self._m2(f)
@propertycache
def _files(self):
if self.isexact():
return [f for f in self._m1.files() if self(f)]
# If m1 is not an exact matcher, we can't easily figure out the set of
# files, because its files() are not always files. For example, if
# m1 is "path:dir" and m2 is "rootfileins:.", we don't
# want to remove "dir" from the set even though it would match m2,
# because the "dir" in m1 may not be a file.
return self._m1.files()
def visitdir(self, dir):
if self._m2.visitdir(dir) == 'all':
return False
return bool(self._m1.visitdir(dir))
def isexact(self):
return self._m1.isexact()
@encoding.strmethod
def __repr__(self):
return ('<differencematcher m1=%r, m2=%r>' % (self._m1, self._m2))
def intersectmatchers(m1, m2):
'''Composes two matchers by matching if both of them match.
The second matcher's non-matching-attributes (root, cwd, bad, explicitdir,
traversedir) are ignored.
'''
if m1 is None or m2 is None:
return m1 or m2
if m1.always():
m = copy.copy(m2)
# TODO: Consider encapsulating these things in a class so there's only
# one thing to copy from m1.
m.bad = m1.bad
m.explicitdir = m1.explicitdir
m.traversedir = m1.traversedir
m.abs = m1.abs
m.rel = m1.rel
m._relativeuipath |= m1._relativeuipath
return m
if m2.always():
m = copy.copy(m1)
m._relativeuipath |= m2._relativeuipath
return m
return intersectionmatcher(m1, m2)
class intersectionmatcher(basematcher):
def __init__(self, m1, m2):
super(intersectionmatcher, self).__init__(m1._root, m1._cwd)
self._m1 = m1
self._m2 = m2
self.bad = m1.bad
self.explicitdir = m1.explicitdir
self.traversedir = m1.traversedir
@propertycache
def _files(self):
if self.isexact():
m1, m2 = self._m1, self._m2
if not m1.isexact():
m1, m2 = m2, m1
return [f for f in m1.files() if m2(f)]
# It neither m1 nor m2 is an exact matcher, we can't easily intersect
# the set of files, because their files() are not always files. For
# example, if intersecting a matcher "-I glob:foo.txt" with matcher of
# "path:dir2", we don't want to remove "dir2" from the set.
return self._m1.files() + self._m2.files()
def matchfn(self, f):
return self._m1(f) and self._m2(f)
def visitdir(self, dir):
visit1 = self._m1.visitdir(dir)
if visit1 == 'all':
return self._m2.visitdir(dir)
# bool() because visit1=True + visit2='all' should not be 'all'
return bool(visit1 and self._m2.visitdir(dir))
def always(self):
return self._m1.always() and self._m2.always()
def isexact(self):
return self._m1.isexact() or self._m2.isexact()
@encoding.strmethod
def __repr__(self):
return ('<intersectionmatcher m1=%r, m2=%r>' % (self._m1, self._m2))
class subdirmatcher(basematcher):
"""Adapt a matcher to work on a subdirectory only.
The paths are remapped to remove/insert the path as needed:
>>> from . import pycompat
>>> m1 = match(b'root', b'', [b'a.txt', b'sub/b.txt'])
>>> m2 = subdirmatcher(b'sub', m1)
>>> bool(m2(b'a.txt'))
False
>>> bool(m2(b'b.txt'))
True
>>> bool(m2.matchfn(b'a.txt'))
False
>>> bool(m2.matchfn(b'b.txt'))
True
>>> m2.files()
['b.txt']
>>> m2.exact(b'b.txt')
True
>>> util.pconvert(m2.rel(b'b.txt'))
'sub/b.txt'
>>> def bad(f, msg):
... print(pycompat.sysstr(b"%s: %s" % (f, msg)))
>>> m1.bad = bad
>>> m2.bad(b'x.txt', b'No such file')
sub/x.txt: No such file
>>> m2.abs(b'c.txt')
'sub/c.txt'
"""
def __init__(self, path, matcher):
super(subdirmatcher, self).__init__(matcher._root, matcher._cwd)
self._path = path
self._matcher = matcher
self._always = matcher.always()
self._files = [f[len(path) + 1:] for f in matcher._files
if f.startswith(path + "/")]
# If the parent repo had a path to this subrepo and the matcher is
# a prefix matcher, this submatcher always matches.
if matcher.prefix():
self._always = any(f == path for f in matcher._files)
def bad(self, f, msg):
self._matcher.bad(self._path + "/" + f, msg)
def abs(self, f):
return self._matcher.abs(self._path + "/" + f)
def rel(self, f):
return self._matcher.rel(self._path + "/" + f)
def uipath(self, f):
return self._matcher.uipath(self._path + "/" + f)
def matchfn(self, f):
# Some information is lost in the superclass's constructor, so we
# can not accurately create the matching function for the subdirectory
# from the inputs. Instead, we override matchfn() and visitdir() to
# call the original matcher with the subdirectory path prepended.
return self._matcher.matchfn(self._path + "/" + f)
def visitdir(self, dir):
if dir == '.':
dir = self._path
else:
dir = self._path + "/" + dir
return self._matcher.visitdir(dir)
def always(self):
return self._always
def prefix(self):
return self._matcher.prefix() and not self._always
@encoding.strmethod
def __repr__(self):
return ('<subdirmatcher path=%r, matcher=%r>' %
(self._path, self._matcher))
class prefixdirmatcher(basematcher):
"""Adapt a matcher to work on a parent directory.
The matcher's non-matching-attributes (root, cwd, bad, explicitdir,
traversedir) are ignored.
The prefix path should usually be the relative path from the root of
this matcher to the root of the wrapped matcher.
>>> m1 = match(util.localpath(b'root/d/e'), b'f', [b'../a.txt', b'b.txt'])
>>> m2 = prefixdirmatcher(b'root', b'd/e/f', b'd/e', m1)
>>> bool(m2(b'a.txt'),)
False
>>> bool(m2(b'd/e/a.txt'))
True
>>> bool(m2(b'd/e/b.txt'))
False
>>> m2.files()
['d/e/a.txt', 'd/e/f/b.txt']
>>> m2.exact(b'd/e/a.txt')
True
>>> m2.visitdir(b'd')
True
>>> m2.visitdir(b'd/e')
True
>>> m2.visitdir(b'd/e/f')
True
>>> m2.visitdir(b'd/e/g')
False
>>> m2.visitdir(b'd/ef')
False
"""
def __init__(self, root, cwd, path, matcher, badfn=None):
super(prefixdirmatcher, self).__init__(root, cwd, badfn)
if not path:
raise error.ProgrammingError('prefix path must not be empty')
self._path = path
self._pathprefix = path + '/'
self._matcher = matcher
@propertycache
def _files(self):
return [self._pathprefix + f for f in self._matcher._files]
def matchfn(self, f):
if not f.startswith(self._pathprefix):
return False
return self._matcher.matchfn(f[len(self._pathprefix):])
@propertycache
def _pathdirs(self):
return set(util.finddirs(self._path)) | {'.'}
def visitdir(self, dir):
if dir == self._path:
return self._matcher.visitdir('.')
if dir.startswith(self._pathprefix):
return self._matcher.visitdir(dir[len(self._pathprefix):])
return dir in self._pathdirs
def isexact(self):
return self._matcher.isexact()
def prefix(self):
return self._matcher.prefix()
@encoding.strmethod
def __repr__(self):
return ('<prefixdirmatcher path=%r, matcher=%r>'
% (pycompat.bytestr(self._path), self._matcher))
class unionmatcher(basematcher):
"""A matcher that is the union of several matchers.
The non-matching-attributes (root, cwd, bad, explicitdir, traversedir) are
taken from the first matcher.
"""
def __init__(self, matchers):
m1 = matchers[0]
super(unionmatcher, self).__init__(m1._root, m1._cwd)
self.explicitdir = m1.explicitdir
self.traversedir = m1.traversedir
self._matchers = matchers
def matchfn(self, f):
for match in self._matchers:
if match(f):
return True
return False
def visitdir(self, dir):
r = False
for m in self._matchers:
v = m.visitdir(dir)
if v == 'all':
return v
r |= v
return r
@encoding.strmethod
def __repr__(self):
return ('<unionmatcher matchers=%r>' % self._matchers)
def patkind(pattern, default=None):
'''If pattern is 'kind:pat' with a known kind, return kind.'''
return _patsplit(pattern, default)[0]
def _patsplit(pattern, default):
"""Split a string into the optional pattern kind prefix and the actual
pattern."""
if ':' in pattern:
kind, pat = pattern.split(':', 1)
if kind in allpatternkinds:
return kind, pat
return default, pattern
def _globre(pat):
r'''Convert an extended glob string to a regexp string.
>>> from . import pycompat
>>> def bprint(s):
... print(pycompat.sysstr(s))
>>> bprint(_globre(br'?'))
.
>>> bprint(_globre(br'*'))
[^/]*
>>> bprint(_globre(br'**'))
.*
>>> bprint(_globre(br'**/a'))
(?:.*/)?a
>>> bprint(_globre(br'a/**/b'))
a/(?:.*/)?b
>>> bprint(_globre(br'[a*?!^][^b][!c]'))
[a*?!^][\^b][^c]
>>> bprint(_globre(br'{a,b}'))
(?:a|b)
>>> bprint(_globre(br'.\*\?'))
\.\*\?
'''
i, n = 0, len(pat)
res = ''
group = 0
escape = util.stringutil.reescape
def peek():
return i < n and pat[i:i + 1]
while i < n:
c = pat[i:i + 1]
i += 1
if c not in '*?[{},\\':
res += escape(c)
elif c == '*':
if peek() == '*':
i += 1
if peek() == '/':
i += 1
res += '(?:.*/)?'
else:
res += '.*'
else:
res += '[^/]*'
elif c == '?':
res += '.'
elif c == '[':
j = i
if j < n and pat[j:j + 1] in '!]':
j += 1
while j < n and pat[j:j + 1] != ']':
j += 1
if j >= n:
res += '\\['
else:
stuff = pat[i:j].replace('\\','\\\\')
i = j + 1
if stuff[0:1] == '!':
stuff = '^' + stuff[1:]
elif stuff[0:1] == '^':
stuff = '\\' + stuff
res = '%s[%s]' % (res, stuff)
elif c == '{':
group += 1
res += '(?:'
elif c == '}' and group:
res += ')'
group -= 1
elif c == ',' and group:
res += '|'
elif c == '\\':
p = peek()
if p:
i += 1
res += escape(p)
else:
res += escape(c)
else:
res += escape(c)
return res
def _regex(kind, pat, globsuffix):
'''Convert a (normalized) pattern of any kind into a regular expression.
globsuffix is appended to the regexp of globs.'''
if not pat:
return ''
if kind == 're':
return pat
if kind in ('path', 'relpath'):
if pat == '.':
return ''
return util.stringutil.reescape(pat) + '(?:/|$)'
if kind == 'rootfilesin':
if pat == '.':
escaped = ''
else:
# Pattern is a directory name.
escaped = util.stringutil.reescape(pat) + '/'
# Anything after the pattern must be a non-directory.
return escaped + '[^/]+$'
if kind == 'relglob':
return '(?:|.*/)' + _globre(pat) + globsuffix
if kind == 'relre':
if pat.startswith('^'):
return pat
return '.*' + pat
if kind == 'glob':
return _globre(pat) + globsuffix
raise error.ProgrammingError('not a regex pattern: %s:%s' % (kind, pat))
def _buildmatch(kindpats, globsuffix, listsubrepos, root):
'''Return regexp string and a matcher function for kindpats.
globsuffix is appended to the regexp of globs.'''
matchfuncs = []
subincludes, kindpats = _expandsubinclude(kindpats, root)
if subincludes:
submatchers = {}
def matchsubinclude(f):
for prefix, matcherargs in subincludes:
if f.startswith(prefix):
mf = submatchers.get(prefix)
if mf is None:
mf = match(*matcherargs)
submatchers[prefix] = mf
if mf(f[len(prefix):]):
return True
return False
matchfuncs.append(matchsubinclude)
regex = ''
if kindpats:
regex, mf = _buildregexmatch(kindpats, globsuffix)
matchfuncs.append(mf)
if len(matchfuncs) == 1:
return regex, matchfuncs[0]
else:
return regex, lambda f: any(mf(f) for mf in matchfuncs)
def _buildregexmatch(kindpats, globsuffix):
"""Build a match function from a list of kinds and kindpats,
return regexp string and a matcher function."""
try:
regex = '(?:%s)' % '|'.join([_regex(k, p, globsuffix)
for (k, p, s) in kindpats])
if len(regex) > 20000:
raise OverflowError
return regex, _rematcher(regex)
except OverflowError:
# We're using a Python with a tiny regex engine and we
# made it explode, so we'll divide the pattern list in two
# until it works
l = len(kindpats)
if l < 2:
raise
regexa, a = _buildregexmatch(kindpats[:l//2], globsuffix)
regexb, b = _buildregexmatch(kindpats[l//2:], globsuffix)
return regex, lambda s: a(s) or b(s)
except re.error:
for k, p, s in kindpats:
try:
_rematcher('(?:%s)' % _regex(k, p, globsuffix))
except re.error:
if s:
raise error.Abort(_("%s: invalid pattern (%s): %s") %
(s, k, p))
else:
raise error.Abort(_("invalid pattern (%s): %s") % (k, p))
raise error.Abort(_("invalid pattern"))
def _patternrootsanddirs(kindpats):
'''Returns roots and directories corresponding to each pattern.
This calculates the roots and directories exactly matching the patterns and
returns a tuple of (roots, dirs) for each. It does not return other
directories which may also need to be considered, like the parent
directories.
'''
r = []
d = []
for kind, pat, source in kindpats:
if kind == 'glob': # find the non-glob prefix
root = []
for p in pat.split('/'):
if '[' in p or '{' in p or '*' in p or '?' in p:
break
root.append(p)
r.append('/'.join(root) or '.')
elif kind in ('relpath', 'path'):
r.append(pat or '.')
elif kind in ('rootfilesin',):
d.append(pat or '.')
else: # relglob, re, relre
r.append('.')
return r, d
def _roots(kindpats):
'''Returns root directories to match recursively from the given patterns.'''
roots, dirs = _patternrootsanddirs(kindpats)
return roots
def _rootsanddirs(kindpats):
'''Returns roots and exact directories from patterns.
roots are directories to match recursively, whereas exact directories should
be matched non-recursively. The returned (roots, dirs) tuple will also
include directories that need to be implicitly considered as either, such as
parent directories.
>>> _rootsanddirs(
... [(b'glob', b'g/h/*', b''), (b'glob', b'g/h', b''),
... (b'glob', b'g*', b'')])
(['g/h', 'g/h', '.'], ['g', '.'])
>>> _rootsanddirs(
... [(b'rootfilesin', b'g/h', b''), (b'rootfilesin', b'', b'')])
([], ['g/h', '.', 'g', '.'])
>>> _rootsanddirs(
... [(b'relpath', b'r', b''), (b'path', b'p/p', b''),
... (b'path', b'', b'')])
(['r', 'p/p', '.'], ['p', '.'])
>>> _rootsanddirs(
... [(b'relglob', b'rg*', b''), (b're', b're/', b''),
... (b'relre', b'rr', b'')])
(['.', '.', '.'], ['.'])
'''
r, d = _patternrootsanddirs(kindpats)
# Append the parents as non-recursive/exact directories, since they must be
# scanned to get to either the roots or the other exact directories.
d.extend(util.dirs(d))
d.extend(util.dirs(r))
# util.dirs() does not include the root directory, so add it manually
d.append('.')
return r, d
def _explicitfiles(kindpats):
'''Returns the potential explicit filenames from the patterns.
>>> _explicitfiles([(b'path', b'foo/bar', b'')])
['foo/bar']
>>> _explicitfiles([(b'rootfilesin', b'foo/bar', b'')])
[]
'''
# Keep only the pattern kinds where one can specify filenames (vs only
# directory names).
filable = [kp for kp in kindpats if kp[0] not in ('rootfilesin',)]
return _roots(filable)
def _prefix(kindpats):
'''Whether all the patterns match a prefix (i.e. recursively)'''
for kind, pat, source in kindpats:
if kind not in ('path', 'relpath'):
return False
return True
_commentre = None
def readpatternfile(filepath, warn, sourceinfo=False):
'''parse a pattern file, returning a list of
patterns. These patterns should be given to compile()
to be validated and converted into a match function.
trailing white space is dropped.
the escape character is backslash.
comments start with #.
empty lines are skipped.
lines can be of the following formats:
syntax: regexp # defaults following lines to non-rooted regexps
syntax: glob # defaults following lines to non-rooted globs
re:pattern # non-rooted regular expression
glob:pattern # non-rooted glob
pattern # pattern of the current default type
if sourceinfo is set, returns a list of tuples:
(pattern, lineno, originalline). This is useful to debug ignore patterns.
'''
syntaxes = {'re': 'relre:', 'regexp': 'relre:', 'glob': 'relglob:',
'include': 'include', 'subinclude': 'subinclude'}
syntax = 'relre:'
patterns = []
fp = open(filepath, 'rb')
for lineno, line in enumerate(util.iterfile(fp), start=1):
if "#" in line:
global _commentre
if not _commentre:
_commentre = util.re.compile(br'((?:^|[^\\])(?:\\\\)*)#.*')
# remove comments prefixed by an even number of escapes
m = _commentre.search(line)
if m:
line = line[:m.end(1)]
# fixup properly escaped comments that survived the above
line = line.replace("\\#", "#")
line = line.rstrip()
if not line:
continue
if line.startswith('syntax:'):
s = line[7:].strip()
try:
syntax = syntaxes[s]
except KeyError:
if warn:
warn(_("%s: ignoring invalid syntax '%s'\n") %
(filepath, s))
continue
linesyntax = syntax
for s, rels in syntaxes.iteritems():
if line.startswith(rels):
linesyntax = rels
line = line[len(rels):]
break
elif line.startswith(s+':'):
linesyntax = rels
line = line[len(s) + 1:]
break
if sourceinfo:
patterns.append((linesyntax + line, lineno, line))
else:
patterns.append(linesyntax + line)
fp.close()
return patterns