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# minifileset.py - a simple language to select files
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#
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# Copyright 2017 Facebook, Inc.
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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from __future__ import absolute_import
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from .i18n import _
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from . import (
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error,
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fileset,
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filesetlang,
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pycompat,
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)
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def _sizep(x):
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# i18n: "size" is a keyword
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expr = filesetlang.getstring(x, _("size requires an expression"))
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return fileset.sizematcher(expr)
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def _compile(tree):
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if not tree:
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raise error.ParseError(_("missing argument"))
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op = tree[0]
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if op in {'symbol', 'string', 'kindpat'}:
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name = filesetlang.getpattern(tree, {'path'}, _('invalid file pattern'))
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if name.startswith('**'): # file extension test, ex. "**.tar.gz"
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ext = name[2:]
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for c in pycompat.bytestr(ext):
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if c in '*{}[]?/\\':
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raise error.ParseError(_('reserved character: %s') % c)
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return lambda n, s: n.endswith(ext)
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elif name.startswith('path:'): # directory or full path test
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p = name[5:] # prefix
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pl = len(p)
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f = lambda n, s: n.startswith(p) and (len(n) == pl
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or n[pl:pl + 1] == '/')
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return f
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raise error.ParseError(_("unsupported file pattern: %s") % name,
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hint=_('paths must be prefixed with "path:"'))
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elif op in {'or', 'patterns'}:
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funcs = [_compile(x) for x in tree[1:]]
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return lambda n, s: any(f(n, s) for f in funcs)
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elif op == 'and':
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func1 = _compile(tree[1])
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func2 = _compile(tree[2])
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return lambda n, s: func1(n, s) and func2(n, s)
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elif op == 'not':
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return lambda n, s: not _compile(tree[1])(n, s)
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elif op == 'func':
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symbols = {
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'all': lambda n, s: True,
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'none': lambda n, s: False,
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'size': lambda n, s: _sizep(tree[2])(s),
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}
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name = filesetlang.getsymbol(tree[1])
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if name in symbols:
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return symbols[name]
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raise error.UnknownIdentifier(name, symbols.keys())
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elif op == 'minus': # equivalent to 'x and not y'
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func1 = _compile(tree[1])
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func2 = _compile(tree[2])
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return lambda n, s: func1(n, s) and not func2(n, s)
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elif op == 'list':
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raise error.ParseError(_("can't use a list in this context"),
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hint=_('see \'hg help "filesets.x or y"\''))
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raise error.ProgrammingError('illegal tree: %r' % (tree,))
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def compile(text):
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"""generate a function (path, size) -> bool from filter specification.
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"text" could contain the operators defined by the fileset language for
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common logic operations, and parenthesis for grouping. The supported path
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tests are '**.extname' for file extension test, and '"path:dir/subdir"'
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for prefix test. The ``size()`` predicate is borrowed from filesets to test
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file size. The predicates ``all()`` and ``none()`` are also supported.
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'(**.php & size(">10MB")) | **.zip | (path:bin & !path:bin/README)' for
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example, will catch all php files whose size is greater than 10 MB, all
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files whose name ends with ".zip", and all files under "bin" in the repo
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root except for "bin/README".
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"""
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tree = filesetlang.parse(text)
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tree = filesetlang.analyze(tree)
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tree = filesetlang.optimize(tree)
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return _compile(tree)
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