# 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
import copy
import os
import re
from .i18n import _
from . import (
pathutil,
util,
)
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(kindpats, ctx, listsubrepos):
'''Returns the kindpats list with the 'set' patterns expanded.'''
fset = set()
other = []
for kind, pat, source in kindpats:
if kind == 'set':
if not ctx:
raise util.Abort("fileset expression with no context")
s = ctx.getfileset(pat)
fset.update(s)
if listsubrepos:
for subpath in ctx.substate:
s = ctx.sub(subpath).getfileset(pat)
fset.update(subpath + '/' + f for f in s)
continue
other.append((kind, pat, source))
return fset, other
def _expandsubinclude(kindpats, root):
'''Returns the list of subinclude matchers 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)
relmatcher = match(newroot, '', [], ['include:%s' % path])
prefix = pathutil.canonpath(root, root, newroot)
if prefix:
prefix += '/'
relmatchers.append((prefix, relmatcher))
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
class match(object):
def __init__(self, root, cwd, patterns, include=[], exclude=[],
default='glob', exact=False, auditor=None, ctx=None,
listsubrepos=False, warn=None, badfn=None):
"""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
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
'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
"""
self._root = root
self._cwd = cwd
self._files = [] # exact files and roots of patterns
self._anypats = bool(include or exclude)
self._always = False
self._pathrestricted = bool(include or exclude or patterns)
self._warn = warn
self._includeroots = set()
self._includedirs = set(['.'])
self._excluderoots = set()
if badfn is not None:
self.bad = badfn
matchfns = []
if include:
kindpats = self._normalize(include, 'glob', root, cwd, auditor)
self.includepat, im = _buildmatch(ctx, kindpats, '(?:/|$)',
listsubrepos, root)
self._includeroots.update(_roots(kindpats))
self._includedirs.update(util.dirs(self._includeroots))
matchfns.append(im)
if exclude:
kindpats = self._normalize(exclude, 'glob', root, cwd, auditor)
self.excludepat, em = _buildmatch(ctx, kindpats, '(?:/|$)',
listsubrepos, root)
if not _anypats(kindpats):
self._excluderoots.update(_roots(kindpats))
matchfns.append(lambda f: not em(f))
if exact:
if isinstance(patterns, list):
self._files = patterns
else:
self._files = list(patterns)
matchfns.append(self.exact)
elif patterns:
kindpats = self._normalize(patterns, default, root, cwd, auditor)
if not _kindpatsalwaysmatch(kindpats):
self._files = _roots(kindpats)
self._anypats = self._anypats or _anypats(kindpats)
self.patternspat, pm = _buildmatch(ctx, kindpats, '$',
listsubrepos, root)
matchfns.append(pm)
if not matchfns:
m = util.always
self._always = True
elif len(matchfns) == 1:
m = matchfns[0]
else:
def m(f):
for matchfn in matchfns:
if not matchfn(f):
return False
return True
self.matchfn = m
self._fileroots = set(self._files)
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.'''
pass
# 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._pathrestricted and self.rel(f)) or self.abs(f)
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 _dirs(self):
return set(util.dirs(self._fileroots)) | set(['.'])
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.
This function's behavior is undefined if it has returned False for
one of the dir's parent directories.
'''
if dir in self._excluderoots:
return False
if (self._includeroots and
'.' not in self._includeroots and
dir not in self._includeroots and
dir not in self._includedirs and
not any(parent in self._includeroots
for parent in util.finddirs(dir))):
return False
return (not self._fileroots or
'.' in self._fileroots or
dir in self._fileroots or
dir in self._dirs or
any(parentdir in self._fileroots
for parentdir in util.finddirs(dir)))
def exact(self, f):
'''Returns True if f is in .files().'''
return f in self._fileroots
def anypats(self):
'''Matcher uses patterns or include/exclude.'''
return self._anypats
def always(self):
'''Matcher will match everything and .files() will be empty
- optimization might be possible and necessary.'''
return self._always
def ispartial(self):
'''True if the matcher won't always match.
Although it's just the inverse of _always in this implementation,
an extenion such as narrowhg might make it return something
slightly different.'''
return not self._always
def isexact(self):
return self.matchfn == self.exact
def prefix(self):
return not self.always() and not self.isexact() and not self.anypats()
def _normalize(self, patterns, default, root, cwd, auditor):
'''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 ('glob', 'relpath'):
pat = pathutil.canonpath(root, cwd, pat, auditor)
elif kind in ('relglob', 'path'):
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 util.Abort(_("unable to read file list (%s)") % pat)
for k, p, source in self._normalize(files, default, root, cwd,
auditor):
kindpats.append((k, p, pat))
continue
elif kind == 'include':
try:
fullpath = os.path.join(root, util.localpath(pat))
includepats = readpatternfile(fullpath, self._warn)
for k, p, source in self._normalize(includepats, default,
root, cwd, auditor):
kindpats.append((k, p, source or pat))
except util.Abort as inst:
raise util.Abort('%s: %s' % (pat, inst[0]))
except IOError as inst:
if self._warn:
self._warn(_("skipping unreadable pattern file "
"'%s': %s\n") % (pat, inst.strerror))
continue
# else: re or relre - which cannot be normalized
kindpats.append((kind, pat, ''))
return kindpats
def exact(root, cwd, files, badfn=None):
return match(root, cwd, files, exact=True, badfn=badfn)
def always(root, cwd):
return match(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
class narrowmatcher(match):
"""Adapt a matcher to work on a subdirectory only.
The paths are remapped to remove/insert the path as needed:
>>> m1 = match('root', '', ['a.txt', 'sub/b.txt'])
>>> m2 = narrowmatcher('sub', m1)
>>> bool(m2('a.txt'))
False
>>> bool(m2('b.txt'))
True
>>> bool(m2.matchfn('a.txt'))
False
>>> bool(m2.matchfn('b.txt'))
True
>>> m2.files()
['b.txt']
>>> m2.exact('b.txt')
True
>>> util.pconvert(m2.rel('b.txt'))
'sub/b.txt'
>>> def bad(f, msg):
... print "%s: %s" % (f, msg)
>>> m1.bad = bad
>>> m2.bad('x.txt', 'No such file')
sub/x.txt: No such file
>>> m2.abs('c.txt')
'sub/c.txt'
"""
def __init__(self, path, matcher):
self._root = matcher._root
self._cwd = matcher._cwd
self._path = path
self._matcher = matcher
self._always = matcher._always
self._pathrestricted = matcher._pathrestricted
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 no patterns are
# specified, this submatcher always matches.
if not self._always and not matcher._anypats:
self._always = any(f == path for f in matcher._files)
self._anypats = matcher._anypats
self.matchfn = lambda fn: matcher.matchfn(self._path + "/" + fn)
self._fileroots = set(self._files)
def abs(self, f):
return self._matcher.abs(self._path + "/" + f)
def bad(self, f, msg):
self._matcher.bad(self._path + "/" + f, msg)
def rel(self, f):
return self._matcher.rel(self._path + "/" + f)
class icasefsmatcher(match):
"""A matcher for wdir on case insensitive filesystems, which normalizes the
given patterns to the case in the filesystem.
"""
def __init__(self, root, cwd, patterns, include, exclude, default, auditor,
ctx, listsubrepos=False, badfn=None):
init = super(icasefsmatcher, self).__init__
self._dirstate = ctx.repo().dirstate
self._dsnormalize = self._dirstate.normalize
init(root, cwd, patterns, include, exclude, default, auditor=auditor,
ctx=ctx, listsubrepos=listsubrepos, badfn=badfn)
# m.exact(file) must be based off of the actual user input, otherwise
# inexact case matches are treated as exact, and not noted without -v.
if self._files:
self._fileroots = set(_roots(self._kp))
def _normalize(self, patterns, default, root, cwd, auditor):
self._kp = super(icasefsmatcher, self)._normalize(patterns, default,
root, cwd, auditor)
kindpats = []
for kind, pats, source in self._kp:
if kind not in ('re', 'relre'): # regex can't be normalized
p = pats
pats = self._dsnormalize(pats)
# Preserve the original to handle a case only rename.
if p != pats and p in self._dirstate:
kindpats.append((kind, p, source))
kindpats.append((kind, pats, source))
return kindpats
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 ('re', 'glob', 'path', 'relglob', 'relpath', 'relre',
'listfile', 'listfile0', 'set', 'include', 'subinclude'):
return kind, pat
return default, pattern
def _globre(pat):
r'''Convert an extended glob string to a regexp string.
>>> print _globre(r'?')
.
>>> print _globre(r'*')
[^/]*
>>> print _globre(r'**')
.*
>>> print _globre(r'**/a')
(?:.*/)?a
>>> print _globre(r'a/**/b')
a\/(?:.*/)?b
>>> print _globre(r'[a*?!^][^b][!c]')
[a*?!^][\^b][^c]
>>> print _globre(r'{a,b}')
(?:a|b)
>>> print _globre(r'.\*\?')
\.\*\?
'''
i, n = 0, len(pat)
res = ''
group = 0
escape = util.re.escape
def peek():
return i < n and pat[i]
while i < n:
c = pat[i]
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] in '!]':
j += 1
while j < n and pat[j] != ']':
j += 1
if j >= n:
res += '\\['
else:
stuff = pat[i:j].replace('\\','\\\\')
i = j + 1
if stuff[0] == '!':
stuff = '^' + stuff[1:]
elif stuff[0] == '^':
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 == 'path':
if pat == '.':
return ''
return '^' + util.re.escape(pat) + '(?:/|$)'
if kind == 'relglob':
return '(?:|.*/)' + _globre(pat) + globsuffix
if kind == 'relpath':
return util.re.escape(pat) + '(?:/|$)'
if kind == 'relre':
if pat.startswith('^'):
return pat
return '.*' + pat
return _globre(pat) + globsuffix
def _buildmatch(ctx, 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:
def matchsubinclude(f):
for prefix, mf in subincludes:
if f.startswith(prefix) and mf(f[len(prefix):]):
return True
return False
matchfuncs.append(matchsubinclude)
fset, kindpats = _expandsets(kindpats, ctx, listsubrepos)
if fset:
matchfuncs.append(fset.__contains__)
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 util.Abort(_("%s: invalid pattern (%s): %s") %
(s, k, p))
else:
raise util.Abort(_("invalid pattern (%s): %s") % (k, p))
raise util.Abort(_("invalid pattern"))
def _roots(kindpats):
'''return roots and exact explicitly listed files from patterns
>>> _roots([('glob', 'g/*', ''), ('glob', 'g', ''), ('glob', 'g*', '')])
['g', 'g', '.']
>>> _roots([('relpath', 'r', ''), ('path', 'p/p', ''), ('path', '', '')])
['r', 'p/p', '.']
>>> _roots([('relglob', 'rg*', ''), ('re', 're/', ''), ('relre', 'rr', '')])
['.', '.', '.']
'''
r = []
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 '.')
else: # relglob, re, relre
r.append('.')
return r
def _anypats(kindpats):
for kind, pat, source in kindpats:
if kind in ('glob', 're', 'relglob', 'relre', 'set'):
return True
_commentre = None
def readpatternfile(filepath, warn):
'''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'''
syntaxes = {'re': 'relre:', 'regexp': 'relre:', 'glob': 'relglob:',
'include': 'include', 'subinclude': 'subinclude'}
syntax = 'relre:'
patterns = []
fp = open(filepath)
for line in fp:
if "#" in line:
global _commentre
if not _commentre:
_commentre = re.compile(r'((^|[^\\])(\\\\)*)#.*')
# remove comments prefixed by an even number of escapes
line = _commentre.sub(r'\1', line)
# 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
patterns.append(linesyntax + line)
fp.close()
return patterns