Mercurial > hg
view mercurial/match.py @ 47072:4c041c71ec01
revlog: introduce an explicit tracking of what the revlog is about
Since the dawn of time, people have been forced to rely to lossy introspection
of the index filename to determine what the purpose and role of the revlog they
encounter is. This is hacky, error prone, inflexible, abstraction-leaky,
<insert-your-own-complaints-here>.
In f63299ee7e4d Raphaël introduced a new attribute to track this information:
`revlog_kind`. However it is initialized in an odd place and various instances
end up not having it set. In addition is only tracking some of the information
we end up having to introspect in various pieces of code.
So we add a new attribute that holds more data and is more strictly enforced.
This work is done in collaboration with Raphaël.
The `revlog_kind` one will be removed/adapted in the next changeset. We expect
to be able to clean up various existing piece of code and to simplify coming
work around the newer revlog format.
Differential Revision: https://phab.mercurial-scm.org/D10352
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
---|---|
date | Tue, 06 Apr 2021 05:20:24 +0200 |
parents | 8bca353b1ebc |
children | 6000f5b25c9b |
line wrap: on
line source
# match.py - filename matching # # Copyright 2008, 2009 Olivia Mackall <olivia@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 bisect import copy import itertools import os import re from .i18n import _ from .pycompat import open from . import ( encoding, error, pathutil, policy, pycompat, util, ) from .utils import stringutil rustmod = policy.importrust('dirstate') allpatternkinds = ( b're', b'glob', b'path', b'relglob', b'relpath', b'relre', b'rootglob', b'listfile', b'listfile0', b'set', b'include', b'subinclude', b'rootfilesin', ) cwdrelativepatternkinds = (b'relpath', b'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(cwd, kindpats, ctx=None, listsubrepos=False, badfn=None): '''Returns the kindpats list with the 'set' patterns expanded to matchers''' matchers = [] other = [] for kind, pat, source in kindpats: if kind == b'set': if ctx is None: raise error.ProgrammingError( b"fileset expression with no context" ) matchers.append(ctx.matchfileset(cwd, pat, badfn=badfn)) if listsubrepos: for subpath in ctx.substate: sm = ctx.sub(subpath).matchfileset(cwd, pat, badfn=badfn) pm = prefixdirmatcher(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 == b'subinclude': sourceroot = pathutil.dirname(util.normpath(source)) pat = util.pconvert(pat) path = pathutil.join(sourceroot, pat) newroot = pathutil.dirname(path) matcherargs = (newroot, b'', [], [b'include:%s' % path]) prefix = pathutil.canonpath(root, root, newroot) if prefix: prefix += b'/' 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 != b'' or kind not in [b'relpath', b'glob']: return False return True def _buildkindpatsmatcher( matchercls, root, cwd, kindpats, ctx=None, listsubrepos=False, badfn=None, ): matchers = [] fms, kindpats = _expandsets( cwd, kindpats, ctx=ctx, listsubrepos=listsubrepos, badfn=badfn, ) if kindpats: m = matchercls(root, kindpats, badfn=badfn) matchers.append(m) if fms: matchers.extend(fms) if not matchers: return nevermatcher(badfn=badfn) if len(matchers) == 1: return matchers[0] return unionmatcher(matchers) def match( root, cwd, patterns=None, include=None, exclude=None, default=b'glob', auditor=None, ctx=None, listsubrepos=False, warn=None, badfn=None, icasefs=False, ): r"""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 auditor - optional path auditor ctx - optional changecontext listsubrepos - if True, recurse into subrepositories 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 >>> def _match(root, *args, **kwargs): ... return match(util.localpath(root), *args, **kwargs) Usually a patternmatcher is returned: >>> _match(b'/foo', b'.', [b're:.*\.c$', b'path:foo/a', b'*.py']) <patternmatcher patterns='.*\\.c$|foo/a(?:/|$)|[^/]*\\.py$'> Combining 'patterns' with 'include' (resp. 'exclude') gives an intersectionmatcher (resp. a differencematcher): >>> type(_match(b'/foo', b'.', [b're:.*\.c$'], include=[b'path:lib'])) <class 'mercurial.match.intersectionmatcher'> >>> type(_match(b'/foo', b'.', [b're:.*\.c$'], exclude=[b'path:build'])) <class 'mercurial.match.differencematcher'> Notice that, if 'patterns' is empty, an alwaysmatcher is returned: >>> _match(b'/foo', b'.', []) <alwaysmatcher> The 'default' argument determines which kind of pattern is assumed if a pattern has no prefix: >>> _match(b'/foo', b'.', [b'.*\.c$'], default=b're') <patternmatcher patterns='.*\\.c$'> >>> _match(b'/foo', b'.', [b'main.py'], default=b'relpath') <patternmatcher patterns='main\\.py(?:/|$)'> >>> _match(b'/foo', b'.', [b'main.py'], default=b're') <patternmatcher patterns='main.py'> The primary use of matchers is to check whether a value (usually a file name) matches againset one of the patterns given at initialization. There are two ways of doing this check. >>> m = _match(b'/foo', b'', [b're:.*\.c$', b'relpath:a']) 1. Calling the matcher with a file name returns True if any pattern matches that file name: >>> m(b'a') True >>> m(b'main.c') True >>> m(b'test.py') False 2. Using the exact() method only returns True if the file name matches one of the exact patterns (i.e. not re: or glob: patterns): >>> m.exact(b'a') True >>> m.exact(b'main.c') False """ assert os.path.isabs(root) cwd = os.path.join(root, util.localpath(cwd)) normalize = _donormalize if icasefs: 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 (b're', b'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 patterns: kindpats = normalize(patterns, default, root, cwd, auditor, warn) if _kindpatsalwaysmatch(kindpats): m = alwaysmatcher(badfn) 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(badfn) if include: kindpats = normalize(include, b'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, b'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(files, badfn=None): return exactmatcher(files, badfn=badfn) def always(badfn=None): return alwaysmatcher(badfn) def never(badfn=None): return nevermatcher(badfn) 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=None, warn=None): """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=auditor) elif kind in (b'relglob', b'path', b'rootfilesin', b'rootglob'): pat = util.normpath(pat) elif kind in (b'listfile', b'listfile0'): try: files = util.readfile(pat) if kind == b'listfile0': files = files.split(b'\0') else: files = files.splitlines() files = [f for f in files if f] except EnvironmentError: raise error.Abort(_(b"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 == b'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( b'%s: %s' % ( pat, inst.message, ) # pytype: disable=unsupported-operands ) except IOError as inst: if warn: warn( _(b"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, b'')) return kindpats class basematcher(object): def __init__(self, badfn=None): if badfn is not None: self.bad = badfn def __call__(self, fn): return self.matchfn(fn) # 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 traversedir is set, it will be called when a directory discovered # by recursive traversal is visited. traversedir = None @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 visitchildrenset(self, dir): """Decides whether a directory should be visited based on whether it has potential matches in it or one of its subdirectories, and potentially lists which subdirectories of that directory should be visited. This is based on the match's primary, included, and excluded patterns. This function is very similar to 'visitdir', and the following mapping can be applied: visitdir | visitchildrenlist ----------+------------------- False | set() 'all' | 'all' True | 'this' OR non-empty set of subdirs -or files- to visit Example: Assume matchers ['path:foo/bar', 'rootfilesin:qux'], we would return the following values (assuming the implementation of visitchildrenset is capable of recognizing this; some implementations are not). '' -> {'foo', 'qux'} 'baz' -> set() 'foo' -> {'bar'} # Ideally this would be 'all', but since the prefix nature of matchers # is applied to the entire matcher, we have to downgrade this to # 'this' due to the non-prefix 'rootfilesin'-kind matcher being mixed # in. 'foo/bar' -> 'this' 'qux' -> 'this' Important: Most matchers do not know if they're representing files or directories. They see ['path:dir/f'] and don't know whether 'f' is a file or a directory, so visitchildrenset('dir') for most matchers will return {'f'}, but if the matcher knows it's a file (like exactmatcher does), it may return 'this'. Do not rely on the return being a set indicating that there are no files in this dir to investigate (or equivalently that if there are files to investigate in 'dir' that it will always return 'this'). """ return b'this' 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, badfn=None): super(alwaysmatcher, self).__init__(badfn) def always(self): return True def matchfn(self, f): return True def visitdir(self, dir): return b'all' def visitchildrenset(self, dir): return b'all' def __repr__(self): return r'<alwaysmatcher>' class nevermatcher(basematcher): '''Matches nothing.''' def __init__(self, badfn=None): super(nevermatcher, self).__init__(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 visitchildrenset(self, dir): return set() def __repr__(self): return r'<nevermatcher>' class predicatematcher(basematcher): """A matcher adapter for a simple boolean function""" def __init__(self, predfn, predrepr=None, badfn=None): super(predicatematcher, self).__init__(badfn) self.matchfn = predfn self._predrepr = predrepr @encoding.strmethod def __repr__(self): s = stringutil.buildrepr(self._predrepr) or pycompat.byterepr( self.matchfn ) return b'<predicatenmatcher pred=%s>' % s def path_or_parents_in_set(path, prefix_set): """Returns True if `path` (or any parent of `path`) is in `prefix_set`.""" l = len(prefix_set) if l == 0: return False if path in prefix_set: return True # If there's more than 5 paths in prefix_set, it's *probably* quicker to # "walk up" the directory hierarchy instead, with the assumption that most # directory hierarchies are relatively shallow and hash lookup is cheap. if l > 5: return any( parentdir in prefix_set for parentdir in pathutil.finddirs(path) ) # FIXME: Ideally we'd never get to this point if this is the case - we'd # recognize ourselves as an 'always' matcher and skip this. if b'' in prefix_set: return True if pycompat.ispy3: sl = ord(b'/') else: sl = '/' # We already checked that path isn't in prefix_set exactly, so # `path[len(pf)] should never raise IndexError. return any(path.startswith(pf) and path[len(pf)] == sl for pf in prefix_set) class patternmatcher(basematcher): r"""Matches a set of (kind, pat, source) against a 'root' directory. >>> kindpats = [ ... (b're', br'.*\.c$', b''), ... (b'path', b'foo/a', b''), ... (b'relpath', b'b', b''), ... (b'glob', b'*.h', b''), ... ] >>> m = patternmatcher(b'foo', kindpats) >>> m(b'main.c') # matches re:.*\.c$ True >>> m(b'b.txt') False >>> m(b'foo/a') # matches path:foo/a True >>> m(b'a') # does not match path:b, since 'root' is 'foo' False >>> m(b'b') # matches relpath:b, since 'root' is 'foo' True >>> m(b'lib.h') # matches glob:*.h True >>> m.files() ['', 'foo/a', 'b', ''] >>> m.exact(b'foo/a') True >>> m.exact(b'b') True >>> m.exact(b'lib.h') # exact matches are for (rel)path kinds False """ def __init__(self, root, kindpats, badfn=None): super(patternmatcher, self).__init__(badfn) self._files = _explicitfiles(kindpats) self._prefix = _prefix(kindpats) self._pats, self.matchfn = _buildmatch(kindpats, b'$', root) @propertycache def _dirs(self): return set(pathutil.dirs(self._fileset)) def visitdir(self, dir): if self._prefix and dir in self._fileset: return b'all' return dir in self._dirs or path_or_parents_in_set(dir, self._fileset) def visitchildrenset(self, dir): ret = self.visitdir(dir) if ret is True: return b'this' elif not ret: return set() assert ret == b'all' return b'all' def prefix(self): return self._prefix @encoding.strmethod def __repr__(self): return b'<patternmatcher patterns=%r>' % pycompat.bytestr(self._pats) # This is basically a reimplementation of pathutil.dirs that stores the # children instead of just a count of them, plus a small optional optimization # to avoid some directories we don't need. class _dirchildren(object): def __init__(self, paths, onlyinclude=None): self._dirs = {} self._onlyinclude = onlyinclude or [] addpath = self.addpath for f in paths: addpath(f) def addpath(self, path): if path == b'': return dirs = self._dirs findsplitdirs = _dirchildren._findsplitdirs for d, b in findsplitdirs(path): if d not in self._onlyinclude: continue dirs.setdefault(d, set()).add(b) @staticmethod def _findsplitdirs(path): # yields (dirname, basename) tuples, walking back to the root. This is # very similar to pathutil.finddirs, except: # - produces a (dirname, basename) tuple, not just 'dirname' # Unlike manifest._splittopdir, this does not suffix `dirname` with a # slash. oldpos = len(path) pos = path.rfind(b'/') while pos != -1: yield path[:pos], path[pos + 1 : oldpos] oldpos = pos pos = path.rfind(b'/', 0, pos) yield b'', path[:oldpos] def get(self, path): return self._dirs.get(path, set()) class includematcher(basematcher): def __init__(self, root, kindpats, badfn=None): super(includematcher, self).__init__(badfn) if rustmod is not None: # We need to pass the patterns to Rust because they can contain # patterns from the user interface self._kindpats = kindpats self._pats, self.matchfn = _buildmatch(kindpats, b'(?:/|$)', root) self._prefix = _prefix(kindpats) roots, dirs, parents = _rootsdirsandparents(kindpats) # roots are directories which are recursively included. self._roots = set(roots) # dirs are directories which are non-recursively included. self._dirs = set(dirs) # parents are directories which are non-recursively included because # they are needed to get to items in _dirs or _roots. self._parents = parents def visitdir(self, dir): if self._prefix and dir in self._roots: return b'all' return ( dir in self._dirs or dir in self._parents or path_or_parents_in_set(dir, self._roots) ) @propertycache def _allparentschildren(self): # It may seem odd that we add dirs, roots, and parents, and then # restrict to only parents. This is to catch the case of: # dirs = ['foo/bar'] # parents = ['foo'] # if we asked for the children of 'foo', but had only added # self._parents, we wouldn't be able to respond ['bar']. return _dirchildren( itertools.chain(self._dirs, self._roots, self._parents), onlyinclude=self._parents, ) def visitchildrenset(self, dir): if self._prefix and dir in self._roots: return b'all' # Note: this does *not* include the 'dir in self._parents' case from # visitdir, that's handled below. if ( b'' in self._roots or dir in self._dirs or path_or_parents_in_set(dir, self._roots) ): return b'this' if dir in self._parents: return self._allparentschildren.get(dir) or set() return set() @encoding.strmethod def __repr__(self): return b'<includematcher includes=%r>' % pycompat.bytestr(self._pats) class exactmatcher(basematcher): r"""Matches the input files exactly. They are interpreted as paths, not patterns (so no kind-prefixes). >>> m = exactmatcher([b'a.txt', br're:.*\.c$']) >>> m(b'a.txt') True >>> m(b'b.txt') False Input files that would be matched are exactly those returned by .files() >>> m.files() ['a.txt', 're:.*\\.c$'] So pattern 're:.*\.c$' is not considered as a regex, but as a file name >>> m(b'main.c') False >>> m(br're:.*\.c$') True """ def __init__(self, files, badfn=None): super(exactmatcher, self).__init__(badfn) if isinstance(files, list): self._files = files else: self._files = list(files) matchfn = basematcher.exact @propertycache def _dirs(self): return set(pathutil.dirs(self._fileset)) def visitdir(self, dir): return dir in self._dirs @propertycache def _visitchildrenset_candidates(self): """A memoized set of candidates for visitchildrenset.""" return self._fileset | self._dirs - {b''} @propertycache def _sorted_visitchildrenset_candidates(self): """A memoized sorted list of candidates for visitchildrenset.""" return sorted(self._visitchildrenset_candidates) def visitchildrenset(self, dir): if not self._fileset or dir not in self._dirs: return set() if dir == b'': candidates = self._visitchildrenset_candidates else: candidates = self._sorted_visitchildrenset_candidates d = dir + b'/' # Use bisect to find the first element potentially starting with d # (i.e. >= d). This should always find at least one element (we'll # assert later if this is not the case). first = bisect.bisect_left(candidates, d) # We need a representation of the first element that is > d that # does not start with d, so since we added a `/` on the end of dir, # we'll add whatever comes after slash (we could probably assume # that `0` is after `/`, but let's not) to the end of dir instead. dnext = dir + encoding.strtolocal(chr(ord(b'/') + 1)) # Use bisect to find the first element >= d_next last = bisect.bisect_left(candidates, dnext, lo=first) dlen = len(d) candidates = {c[dlen:] for c in candidates[first:last]} # self._dirs includes all of the directories, recursively, so if # we're attempting to match foo/bar/baz.txt, it'll have '', 'foo', # 'foo/bar' in it. Thus we can safely ignore a candidate that has a # '/' in it, indicating a it's for a subdir-of-a-subdir; the # immediate subdir will be in there without a slash. ret = {c for c in candidates if b'/' not in c} # We really do not expect ret to be empty, since that would imply that # there's something in _dirs that didn't have a file in _fileset. assert ret return ret def isexact(self): return True @encoding.strmethod def __repr__(self): return b'<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 (bad, traversedir) are ignored. """ def __init__(self, m1, m2): super(differencematcher, self).__init__() self._m1 = m1 self._m2 = m2 self.bad = m1.bad 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) == b'all': return False elif not self._m2.visitdir(dir): # m2 does not match dir, we can return 'all' here if possible return self._m1.visitdir(dir) return bool(self._m1.visitdir(dir)) def visitchildrenset(self, dir): m2_set = self._m2.visitchildrenset(dir) if m2_set == b'all': return set() m1_set = self._m1.visitchildrenset(dir) # Possible values for m1: 'all', 'this', set(...), set() # Possible values for m2: 'this', set(...), set() # If m2 has nothing under here that we care about, return m1, even if # it's 'all'. This is a change in behavior from visitdir, which would # return True, not 'all', for some reason. if not m2_set: return m1_set if m1_set in [b'all', b'this']: # Never return 'all' here if m2_set is any kind of non-empty (either # 'this' or set(foo)), since m2 might return set() for a # subdirectory. return b'this' # Possible values for m1: set(...), set() # Possible values for m2: 'this', set(...) # We ignore m2's set results. They're possibly incorrect: # m1 = path:dir/subdir, m2=rootfilesin:dir, visitchildrenset(''): # m1 returns {'dir'}, m2 returns {'dir'}, if we subtracted we'd # return set(), which is *not* correct, we still need to visit 'dir'! return m1_set def isexact(self): return self._m1.isexact() @encoding.strmethod def __repr__(self): return b'<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 (bad, 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.traversedir = m1.traversedir return m if m2.always(): m = copy.copy(m1) return m return intersectionmatcher(m1, m2) class intersectionmatcher(basematcher): def __init__(self, m1, m2): super(intersectionmatcher, self).__init__() self._m1 = m1 self._m2 = m2 self.bad = m1.bad 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 == b'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 visitchildrenset(self, dir): m1_set = self._m1.visitchildrenset(dir) if not m1_set: return set() m2_set = self._m2.visitchildrenset(dir) if not m2_set: return set() if m1_set == b'all': return m2_set elif m2_set == b'all': return m1_set if m1_set == b'this' or m2_set == b'this': return b'this' assert isinstance(m1_set, set) and isinstance(m2_set, set) return m1_set.intersection(m2_set) 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 b'<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(util.localpath(b'/root'), b'', [b'a.txt', b'sub/b.txt'], auditor=lambda name: None) >>> m2 = subdirmatcher(b'sub', m1) >>> m2(b'a.txt') False >>> m2(b'b.txt') True >>> m2.matchfn(b'a.txt') False >>> m2.matchfn(b'b.txt') True >>> m2.files() ['b.txt'] >>> m2.exact(b'b.txt') True >>> 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 """ def __init__(self, path, matcher): super(subdirmatcher, self).__init__() 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 + b"/") ] # 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 + b"/" + f, msg) 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 + b"/" + f) def visitdir(self, dir): if dir == b'': dir = self._path else: dir = self._path + b"/" + dir return self._matcher.visitdir(dir) def visitchildrenset(self, dir): if dir == b'': dir = self._path else: dir = self._path + b"/" + dir return self._matcher.visitchildrenset(dir) def always(self): return self._always def prefix(self): return self._matcher.prefix() and not self._always @encoding.strmethod def __repr__(self): return b'<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 (bad, 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'], auditor=lambda name: None) >>> m2 = prefixdirmatcher(b'd/e', m1) >>> m2(b'a.txt') False >>> m2(b'd/e/a.txt') True >>> 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, path, matcher, badfn=None): super(prefixdirmatcher, self).__init__(badfn) if not path: raise error.ProgrammingError(b'prefix path must not be empty') self._path = path self._pathprefix = path + b'/' 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(pathutil.finddirs(self._path)) def visitdir(self, dir): if dir == self._path: return self._matcher.visitdir(b'') if dir.startswith(self._pathprefix): return self._matcher.visitdir(dir[len(self._pathprefix) :]) return dir in self._pathdirs def visitchildrenset(self, dir): if dir == self._path: return self._matcher.visitchildrenset(b'') if dir.startswith(self._pathprefix): return self._matcher.visitchildrenset(dir[len(self._pathprefix) :]) if dir in self._pathdirs: return b'this' return set() def isexact(self): return self._matcher.isexact() def prefix(self): return self._matcher.prefix() @encoding.strmethod def __repr__(self): return b'<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 (bad, traversedir) are taken from the first matcher. """ def __init__(self, matchers): m1 = matchers[0] super(unionmatcher, self).__init__() 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 == b'all': return v r |= v return r def visitchildrenset(self, dir): r = set() this = False for m in self._matchers: v = m.visitchildrenset(dir) if not v: continue if v == b'all': return v if this or v == b'this': this = True # don't break, we might have an 'all' in here. continue assert isinstance(v, set) r = r.union(v) if this: return b'this' return r @encoding.strmethod def __repr__(self): return b'<unionmatcher matchers=%r>' % self._matchers def patkind(pattern, default=None): r"""If pattern is 'kind:pat' with a known kind, return kind. >>> patkind(br're:.*\.c$') 're' >>> patkind(b'glob:*.c') 'glob' >>> patkind(b'relpath:test.py') 'relpath' >>> patkind(b'main.py') >>> patkind(b'main.py', default=b're') 're' """ return _patsplit(pattern, default)[0] def _patsplit(pattern, default): """Split a string into the optional pattern kind prefix and the actual pattern.""" if b':' in pattern: kind, pat = pattern.split(b':', 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 = b'' group = 0 escape = util.stringutil.regexbytesescapemap.get def peek(): return i < n and pat[i : i + 1] while i < n: c = pat[i : i + 1] i += 1 if c not in b'*?[{},\\': res += escape(c, c) elif c == b'*': if peek() == b'*': i += 1 if peek() == b'/': i += 1 res += b'(?:.*/)?' else: res += b'.*' else: res += b'[^/]*' elif c == b'?': res += b'.' elif c == b'[': j = i if j < n and pat[j : j + 1] in b'!]': j += 1 while j < n and pat[j : j + 1] != b']': j += 1 if j >= n: res += b'\\[' else: stuff = pat[i:j].replace(b'\\', b'\\\\') i = j + 1 if stuff[0:1] == b'!': stuff = b'^' + stuff[1:] elif stuff[0:1] == b'^': stuff = b'\\' + stuff res = b'%s[%s]' % (res, stuff) elif c == b'{': group += 1 res += b'(?:' elif c == b'}' and group: res += b')' group -= 1 elif c == b',' and group: res += b'|' elif c == b'\\': p = peek() if p: i += 1 res += escape(p, p) else: res += escape(c, c) else: res += escape(c, 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 and kind in (b'glob', b'relpath'): return b'' if kind == b're': return pat if kind in (b'path', b'relpath'): if pat == b'.': return b'' return util.stringutil.reescape(pat) + b'(?:/|$)' if kind == b'rootfilesin': if pat == b'.': escaped = b'' else: # Pattern is a directory name. escaped = util.stringutil.reescape(pat) + b'/' # Anything after the pattern must be a non-directory. return escaped + b'[^/]+$' if kind == b'relglob': globre = _globre(pat) if globre.startswith(b'[^/]*'): # When pat has the form *XYZ (common), make the returned regex more # legible by returning the regex for **XYZ instead of **/*XYZ. return b'.*' + globre[len(b'[^/]*') :] + globsuffix return b'(?:|.*/)' + globre + globsuffix if kind == b'relre': if pat.startswith(b'^'): return pat return b'.*' + pat if kind in (b'glob', b'rootglob'): return _globre(pat) + globsuffix raise error.ProgrammingError(b'not a regex pattern: %s:%s' % (kind, pat)) def _buildmatch(kindpats, globsuffix, root): """Return regexp string and a matcher function for kindpats. globsuffix is appended to the regexp of globs.""" matchfuncs = [] subincludes, kindpats = _expandsubinclude(kindpats, root) if subincludes: submatchers = {} def matchsubinclude(f): for prefix, matcherargs in subincludes: if f.startswith(prefix): mf = submatchers.get(prefix) if mf is None: mf = match(*matcherargs) submatchers[prefix] = mf if mf(f[len(prefix) :]): return True return False matchfuncs.append(matchsubinclude) regex = b'' if kindpats: if all(k == b'rootfilesin' for k, p, s in kindpats): dirs = {p for k, p, s in kindpats} def mf(f): i = f.rfind(b'/') if i >= 0: dir = f[:i] else: dir = b'.' return dir in dirs regex = b'rootfilesin: %s' % stringutil.pprint(list(sorted(dirs))) matchfuncs.append(mf) else: regex, mf = _buildregexmatch(kindpats, globsuffix) matchfuncs.append(mf) if len(matchfuncs) == 1: return regex, matchfuncs[0] else: return regex, lambda f: any(mf(f) for mf in matchfuncs) MAX_RE_SIZE = 20000 def _joinregexes(regexps): """gather multiple regular expressions into a single one""" return b'|'.join(regexps) def _buildregexmatch(kindpats, globsuffix): """Build a match function from a list of kinds and kindpats, return regexp string and a matcher function. Test too large input >>> _buildregexmatch([ ... (b'relglob', b'?' * MAX_RE_SIZE, b'') ... ], b'$') Traceback (most recent call last): ... Abort: matcher pattern is too long (20009 bytes) """ try: allgroups = [] regexps = [_regex(k, p, globsuffix) for (k, p, s) in kindpats] fullregexp = _joinregexes(regexps) startidx = 0 groupsize = 0 for idx, r in enumerate(regexps): piecesize = len(r) if piecesize > MAX_RE_SIZE: msg = _(b"matcher pattern is too long (%d bytes)") % piecesize raise error.Abort(msg) elif (groupsize + piecesize) > MAX_RE_SIZE: group = regexps[startidx:idx] allgroups.append(_joinregexes(group)) startidx = idx groupsize = 0 groupsize += piecesize + 1 if startidx == 0: matcher = _rematcher(fullregexp) func = lambda s: bool(matcher(s)) else: group = regexps[startidx:] allgroups.append(_joinregexes(group)) allmatchers = [_rematcher(g) for g in allgroups] func = lambda s: any(m(s) for m in allmatchers) return fullregexp, func except re.error: for k, p, s in kindpats: try: _rematcher(_regex(k, p, globsuffix)) except re.error: if s: raise error.Abort( _(b"%s: invalid pattern (%s): %s") % (s, k, p) ) else: raise error.Abort(_(b"invalid pattern (%s): %s") % (k, p)) raise error.Abort(_(b"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 in (b'glob', b'rootglob'): # find the non-glob prefix root = [] for p in pat.split(b'/'): if b'[' in p or b'{' in p or b'*' in p or b'?' in p: break root.append(p) r.append(b'/'.join(root)) elif kind in (b'relpath', b'path'): if pat == b'.': pat = b'' r.append(pat) elif kind in (b'rootfilesin',): if pat == b'.': pat = b'' d.append(pat) else: # relglob, re, relre r.append(b'') return r, d def _roots(kindpats): '''Returns root directories to match recursively from the given patterns.''' roots, dirs = _patternrootsanddirs(kindpats) return roots def _rootsdirsandparents(kindpats): """Returns roots and exact directories from patterns. `roots` are directories to match recursively, `dirs` should be matched non-recursively, and `parents` are the implicitly required directories to walk to items in either roots or dirs. Returns a tuple of (roots, dirs, parents). >>> r = _rootsdirsandparents( ... [(b'glob', b'g/h/*', b''), (b'glob', b'g/h', b''), ... (b'glob', b'g*', b'')]) >>> print(r[0:2], sorted(r[2])) # the set has an unstable output (['g/h', 'g/h', ''], []) ['', 'g'] >>> r = _rootsdirsandparents( ... [(b'rootfilesin', b'g/h', b''), (b'rootfilesin', b'', b'')]) >>> print(r[0:2], sorted(r[2])) # the set has an unstable output ([], ['g/h', '']) ['', 'g'] >>> r = _rootsdirsandparents( ... [(b'relpath', b'r', b''), (b'path', b'p/p', b''), ... (b'path', b'', b'')]) >>> print(r[0:2], sorted(r[2])) # the set has an unstable output (['r', 'p/p', ''], []) ['', 'p'] >>> r = _rootsdirsandparents( ... [(b'relglob', b'rg*', b''), (b're', b're/', b''), ... (b'relre', b'rr', b'')]) >>> print(r[0:2], sorted(r[2])) # the set has an unstable output (['', '', ''], []) [''] """ r, d = _patternrootsanddirs(kindpats) p = set() # Add the parents as non-recursive/exact directories, since they must be # scanned to get to either the roots or the other exact directories. p.update(pathutil.dirs(d)) p.update(pathutil.dirs(r)) # FIXME: all uses of this function convert these to sets, do so before # returning. # FIXME: all uses of this function do not need anything in 'roots' and # 'dirs' to also be in 'parents', consider removing them before returning. return r, d, p 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 (b'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 (b'path', b'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 rootglob:pat # rooted glob (same root as ^ in regexps) 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 = { b're': b'relre:', b'regexp': b'relre:', b'glob': b'relglob:', b'rootglob': b'rootglob:', b'include': b'include', b'subinclude': b'subinclude', } syntax = b'relre:' patterns = [] fp = open(filepath, b'rb') for lineno, line in enumerate(util.iterfile(fp), start=1): if b"#" 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(b"\\#", b"#") line = line.rstrip() if not line: continue if line.startswith(b'syntax:'): s = line[7:].strip() try: syntax = syntaxes[s] except KeyError: if warn: warn( _(b"%s: ignoring invalid syntax '%s'\n") % (filepath, s) ) continue linesyntax = syntax for s, rels in pycompat.iteritems(syntaxes): if line.startswith(rels): linesyntax = rels line = line[len(rels) :] break elif line.startswith(s + b':'): 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