match: let 'path:.' and 'path:' match everything (issue4687)
Previously, both queries exited with code 1, printing nothing. The pattern in
the latter query is normalized to '.', so it is really the same case.
# 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.
import re
import util, pathutil
from i18n import _
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):
'''Returns the kindpats list with the 'set' patterns expanded.'''
fset = set()
other = []
for kind, pat in kindpats:
if kind == 'set':
if not ctx:
raise util.Abort("fileset expression with no context")
s = ctx.getfileset(pat)
fset.update(s)
continue
other.append((kind, pat))
return fset, other
def _kindpatsalwaysmatch(kindpats):
""""Checks whether the kindspats match everything, as e.g.
'relpath:.' does.
"""
for kind, pat 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):
"""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)
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
'<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)
matchfns = []
if include:
kindpats = self._normalize(include, 'glob', root, cwd, auditor)
self.includepat, im = _buildmatch(ctx, kindpats, '(?:/|$)')
matchfns.append(im)
if exclude:
kindpats = self._normalize(exclude, 'glob', root, cwd, auditor)
self.excludepat, em = _buildmatch(ctx, kindpats, '(?:/|$)')
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, '$')
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._fmap = 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._fmap)) | set(['.'])
def visitdir(self, dir):
'''Helps while traversing a directory tree. 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. If 'all' is returned, calling this method on a subdirectory
gives an undefined result.'''
if not self._fmap or self.exact(dir):
return 'all'
return dir in self._dirs
def exact(self, f):
'''Returns True if f is in .files().'''
return f in self._fmap
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 isexact(self):
return self.matchfn == self.exact
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)
kindpats += self._normalize(files, default, root, cwd, auditor)
continue
# else: re or relre - which cannot be normalized
kindpats.append((kind, pat))
return kindpats
def exact(root, cwd, files):
return match(root, cwd, files, exact=True)
def always(root, cwd):
return match(root, cwd, [])
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 = util.any(f == path for f in matcher._files)
self._anypats = matcher._anypats
self.matchfn = lambda fn: matcher.matchfn(self._path + "/" + fn)
self._fmap = 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):
init = super(icasefsmatcher, self).__init__
self._dsnormalize = ctx.repo().dirstate.normalize
init(root, cwd, patterns, include, exclude, default, auditor=auditor,
ctx=ctx)
# 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._fmap = 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 in self._kp:
if kind not in ('re', 'relre'): # regex can't be normalized
pats = self._dsnormalize(pats)
kindpats.append((kind, pats))
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'):
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):
'''Return regexp string and a matcher function for kindpats.
globsuffix is appended to the regexp of globs.'''
fset, kindpats = _expandsets(kindpats, ctx)
if not kindpats:
return "", fset.__contains__
regex, mf = _buildregexmatch(kindpats, globsuffix)
if fset:
return regex, lambda f: f in fset or mf(f)
return regex, mf
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) 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 in kindpats:
try:
_rematcher('(?:%s)' % _regex(k, p, globsuffix))
except re.error:
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 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 in kindpats:
if kind in ('glob', 're', 'relglob', 'relre', 'set'):
return True