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"""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__
#
# 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__ = "__FILE__ __REVISION__ __DATE__ __DEVELOPER__"
__all__ = ['PackageVariable',]
import string
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)
# Local Variables:
# tab-width:4
# indent-tabs-mode:nil
# End:
# vim: set expandtab tabstop=4 shiftwidth=4:
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