Mercurial > hg
view mercurial/minifileset.py @ 43892:d587937600be
clone: extract helper for checking mutually exclusive args
We have some duplicated code for aborting if the user provided
mutually exclusive arguments. Extensions surely have more such
code. We also have duplicated translations and inconsistent output in
this area.
This patch introduces a simpler helper for checking if more than one
option among a given set was given on the command line. I've made the
clone code call the function to show that it works.
The function has no good way of checking arguments with hyphens in
them. I'll add that later if necessary. The function still won't be
applicable in all cases, but I think it's still better than nothing.
Differential Revision: https://phab.mercurial-scm.org/D7633
author | Martin von Zweigbergk <martinvonz@google.com> |
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date | Thu, 12 Dec 2019 15:16:13 -0800 |
parents | 687b865b95ad |
children | 6000f5b25c9b |
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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, _(b"size requires an expression")) return fileset.sizematcher(expr) def _compile(tree): if not tree: raise error.ParseError(_(b"missing argument")) op = tree[0] if op == b'withstatus': return _compile(tree[1]) elif op in {b'symbol', b'string', b'kindpat'}: name = filesetlang.getpattern( tree, {b'path'}, _(b'invalid file pattern') ) if name.startswith(b'**'): # file extension test, ex. "**.tar.gz" ext = name[2:] for c in pycompat.bytestr(ext): if c in b'*{}[]?/\\': raise error.ParseError(_(b'reserved character: %s') % c) return lambda n, s: n.endswith(ext) elif name.startswith(b'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] == b'/' ) return f raise error.ParseError( _(b"unsupported file pattern: %s") % name, hint=_(b'paths must be prefixed with "path:"'), ) elif op in {b'or', b'patterns'}: funcs = [_compile(x) for x in tree[1:]] return lambda n, s: any(f(n, s) for f in funcs) elif op == b'and': func1 = _compile(tree[1]) func2 = _compile(tree[2]) return lambda n, s: func1(n, s) and func2(n, s) elif op == b'not': return lambda n, s: not _compile(tree[1])(n, s) elif op == b'func': symbols = { b'all': lambda n, s: True, b'none': lambda n, s: False, b'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 == b'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 == b'list': raise error.ParseError( _(b"can't use a list in this context"), hint=_(b'see \'hg help "filesets.x or y"\''), ) raise error.ProgrammingError(b'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)