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# Copyright 2013-2014 Ben Longbons <b.r.longbons@gmail.com>
#
# This file is part of attoconf.
#
# attoconf is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# attoconf is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with attoconf. If not, see <http://www.gnu.org/licenses/>.
import os
from pipes import quote as shell_quote
from shlex import split as shell_split
from .core import trim_trailing_slashes
class IntRange(object):
def __init__(self, min, max):
self.min = min
self.max = max
def __call__(self, s):
i = int(s)
if self.min <= i <= self.max:
return i
raise ValueError('%d is out of range' % i)
sint = IntRange(float('-inf'), float('inf'))
uint = IntRange(0, float('inf'))
class enum(object):
__slots__ = ('args',)
def __init__(self, *args):
self.args = args
def __call__(self, s):
if s in self.args:
return s
raise ValueError('%r not in {%s}' % (s, ', '.join(self.args)))
class maybe(object):
__slots__ = ('inferior')
def __init__(self, inferior):
self.inferior = inferior
def __call__(self, s):
if not s:
return s
return (self.inferior)(s)
class ShellList(object):
''' An argument type representing a sequence of 0 or more arguments
'''
__slots__ = ('list',)
def __init__(self, arg):
if isinstance(arg, str):
self.list = shell_split(arg)
elif isinstance(arg, list):
self.list = arg[:]
elif isinstance(arg, ShellList):
self.list = arg.list[:]
else:
raise TypeError('arg is an instance of %s' % type(arg).__name__)
def __str__(self):
return ' '.join(shell_quote(a) for a in self.list)
def __add__(self, other):
if isinstance(other, str):
other = shell_split(other)
elif isinstance(other, ShellList):
other = other.list
elif not isinstance(other, list):
raise TypeError('arg is an instance of %s' % type(arg).__name__)
return ShellList(self.list + other)
def shell_word(s):
if s != shell_quote(s):
raise ValueError('not a word: %r' % s)
return s
def shell_partial_word(s):
if s == '':
return s
return shell_word(s)
def quoted_string(s):
return shell_quote(s)
def filepath(s):
s = trim_trailing_slashes(s)
# must be absolute *and* canonical, except joinable
a = os.path.abspath(s)
if a == '/':
# filepaths often directly cat a subpath
# @me@/whatever is invalid if @me@ == /
a = '/.'
if s != a:
raise ValueError('Not an absolute, canonical (except joinable) pathname: %r != %r' % (s, a))
return s
def triple(s):
# Triples do not, in fact, follow a regular pattern.
# Some have only two segments, some appear to have four ...
# Also, sometimes a wrong thing is used as a triple.
# All we *really* care about is generating the tool names.
if s.startswith('-') or s.endswith('-') or '-' not in s[1:-1]:
raise ValueError('Probably not a triple')
return s
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