PackageVariable.py.svn-base
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上传日期:2018-11-18
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文件大小:3k
源码类别:
外挂编程
开发平台:
Windows_Unix
- """engine.SCons.Variables.PackageVariable
- This file defines the option type for SCons implementing 'package
- activation'.
- To be used whenever a 'package' may be enabled/disabled and the
- package path may be specified.
- Usage example:
- Examples:
- x11=no (disables X11 support)
- x11=yes (will search for the package installation dir)
- x11=/usr/local/X11 (will check this path for existance)
- To replace autoconf's --with-xxx=yyy
- opts = Variables()
- opts.Add(PackageVariable('x11',
- 'use X11 installed here (yes = search some places',
- 'yes'))
- ...
- if env['x11'] == True:
- dir = ... search X11 in some standard places ...
- env['x11'] = dir
- if env['x11']:
- ... build with x11 ...
- """
- #
- # Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 The SCons Foundation
- #
- # Permission is hereby granted, free of charge, to any person obtaining
- # a copy of this software and associated documentation files (the
- # "Software"), to deal in the Software without restriction, including
- # without limitation the rights to use, copy, modify, merge, publish,
- # distribute, sublicense, and/or sell copies of the Software, and to
- # permit persons to whom the Software is furnished to do so, subject to
- # the following conditions:
- #
- # The above copyright notice and this permission notice shall be included
- # in all copies or substantial portions of the Software.
- #
- # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
- # KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
- # WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
- # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
- # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
- # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- #
- __revision__ = "src/engine/SCons/Variables/PackageVariable.py 3057 2008/06/09 22:21:00 knight"
- __all__ = ['PackageVariable',]
- import string
- import SCons.compat
- import SCons.Errors
- __enable_strings = ('1', 'yes', 'true', 'on', 'enable', 'search')
- __disable_strings = ('0', 'no', 'false', 'off', 'disable')
- def _converter(val):
- """
- """
- lval = string.lower(val)
- if lval in __enable_strings: return True
- if lval in __disable_strings: return False
- #raise ValueError("Invalid value for boolean option: %s" % val)
- return val
- def _validator(key, val, env, searchfunc):
- # NB: searchfunc is currenty undocumented and unsupported
- """
- """
- # todo: write validator, check for path
- import os
- if env[key] is True:
- if searchfunc:
- env[key] = searchfunc(key, val)
- elif env[key] and not os.path.exists(val):
- raise SCons.Errors.UserError(
- 'Path does not exist for option %s: %s' % (key, val))
- def PackageVariable(key, help, default, searchfunc=None):
- # NB: searchfunc is currenty undocumented and unsupported
- """
- The input parameters describe a 'package list' option, thus they
- are returned with the correct converter and validator appended. The
- result is usable for input to opts.Add() .
- A 'package list' option may either be 'all', 'none' or a list of
- package names (seperated by space).
- """
- help = string.join(
- (help, '( yes | no | /path/to/%s )' % key),
- 'n ')
- return (key, help, default,
- lambda k, v, e, f=searchfunc: _validator(k,v,e,f),
- _converter)