Mercurial > hg
view mercurial/minifileset.py @ 42411:4738c292a520
narrowspec: replace one recursion-avoidance hack with another
When updating the working copy narrowspec, we call context.walk() in
order to find which files to update the working copy
with. context.walk() calls repo.narrowmatch(). In order to avoid
infinite recursion in this case, we have a hack that assigns the new
values for repo.narrowpats and repo._narrowmatch. However, doing that
of course breaks future invalidation of those properties (they're
@storecache'd). Let's instead avoid the infinite recursion by setting
a flag on the repo instance when we're updating the working copy.
Differential Revision: https://phab.mercurial-scm.org/D6468
author | Martin von Zweigbergk <martinvonz@google.com> |
---|---|
date | Fri, 31 May 2019 15:28:31 -0700 |
parents | e79a69af1593 |
children | 57875cf423c9 |
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# minifileset.py - a simple language to select files # # Copyright 2017 Facebook, Inc. # # 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 from .i18n import _ from . import ( error, fileset, filesetlang, pycompat, ) def _sizep(x): # i18n: "size" is a keyword expr = filesetlang.getstring(x, _("size requires an expression")) return fileset.sizematcher(expr) def _compile(tree): if not tree: raise error.ParseError(_("missing argument")) op = tree[0] if op == 'withstatus': return _compile(tree[1]) elif op in {'symbol', 'string', 'kindpat'}: name = filesetlang.getpattern(tree, {'path'}, _('invalid file pattern')) if name.startswith('**'): # file extension test, ex. "**.tar.gz" ext = name[2:] for c in pycompat.bytestr(ext): if c in '*{}[]?/\\': raise error.ParseError(_('reserved character: %s') % c) return lambda n, s: n.endswith(ext) elif name.startswith('path:'): # directory or full path test p = name[5:] # prefix pl = len(p) f = lambda n, s: n.startswith(p) and (len(n) == pl or n[pl:pl + 1] == '/') return f raise error.ParseError(_("unsupported file pattern: %s") % name, hint=_('paths must be prefixed with "path:"')) elif op in {'or', 'patterns'}: funcs = [_compile(x) for x in tree[1:]] return lambda n, s: any(f(n, s) for f in funcs) elif op == 'and': func1 = _compile(tree[1]) func2 = _compile(tree[2]) return lambda n, s: func1(n, s) and func2(n, s) elif op == 'not': return lambda n, s: not _compile(tree[1])(n, s) elif op == 'func': symbols = { 'all': lambda n, s: True, 'none': lambda n, s: False, 'size': lambda n, s: _sizep(tree[2])(s), } name = filesetlang.getsymbol(tree[1]) if name in symbols: return symbols[name] raise error.UnknownIdentifier(name, symbols.keys()) elif op == 'minus': # equivalent to 'x and not y' func1 = _compile(tree[1]) func2 = _compile(tree[2]) return lambda n, s: func1(n, s) and not func2(n, s) elif op == 'list': raise error.ParseError(_("can't use a list in this context"), hint=_('see \'hg help "filesets.x or y"\'')) raise error.ProgrammingError('illegal tree: %r' % (tree,)) def compile(text): """generate a function (path, size) -> bool from filter specification. "text" could contain the operators defined by the fileset language for common logic operations, and parenthesis for grouping. The supported path tests are '**.extname' for file extension test, and '"path:dir/subdir"' for prefix test. The ``size()`` predicate is borrowed from filesets to test file size. The predicates ``all()`` and ``none()`` are also supported. '(**.php & size(">10MB")) | **.zip | (path:bin & !path:bin/README)' for example, will catch all php files whose size is greater than 10 MB, all files whose name ends with ".zip", and all files under "bin" in the repo root except for "bin/README". """ tree = filesetlang.parse(text) tree = filesetlang.analyze(tree) tree = filesetlang.optimize(tree) return _compile(tree)