mercurial/minifileset.py
author Yuya Nishihara <yuya@tcha.org>
Sun, 27 Oct 2019 12:36:52 +0900
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config: add support for defaultvalue of list of printable elements
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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, _(b"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(_(b"missing argument"))
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    op = tree[0]
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    if op == b'withstatus':
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        return _compile(tree[1])
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    elif op in {b'symbol', b'string', b'kindpat'}:
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        name = filesetlang.getpattern(
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            tree, {b'path'}, _(b'invalid file pattern')
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        )
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        if name.startswith(b'**'):  # 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 b'*{}[]?/\\':
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                    raise error.ParseError(_(b'reserved character: %s') % c)
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            return lambda n, s: n.endswith(ext)
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        elif name.startswith(b'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 (
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                len(n) == pl or n[pl : pl + 1] == b'/'
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            )
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            return f
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        raise error.ParseError(
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            _(b"unsupported file pattern: %s") % name,
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            hint=_(b'paths must be prefixed with "path:"'),
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        )
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    elif op in {b'or', b'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 == b'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 == b'not':
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        return lambda n, s: not _compile(tree[1])(n, s)
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    elif op == b'func':
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        symbols = {
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            b'all': lambda n, s: True,
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            b'none': lambda n, s: False,
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            b'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 == b'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 == b'list':
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        raise error.ParseError(
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            _(b"can't use a list in this context"),
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            hint=_(b'see \'hg help "filesets.x or y"\''),
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        )
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    raise error.ProgrammingError(b'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)