# MIT License
#
# Copyright The SCons Foundation
#
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# a copy of this software and associated documentation files (the
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# the following conditions:
#
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"""Option type for list Variables.
This file defines the option type for SCons implementing 'lists'.
A 'list' option may either be 'all', 'none' or a list of names
separated by comma. After the option has been processed, the option
value holds either the named list elements, all list elements or no
list elements at all.
Usage example::
list_of_libs = Split('x11 gl qt ical')
opts = Variables()
opts.Add(
ListVariable(
'shared',
'libraries to build as shared libraries',
'all',
elems=list_of_libs,
)
)
...
for lib in list_of_libs:
if lib in env['shared']:
env.SharedObject(...)
else:
env.Object(...)
"""
# Known Bug: This should behave like a Set-Type, but does not really,
# since elements can occur twice.
__all__ = ['ListVariable',]
import collections
import SCons.Util
class _ListVariable(collections.UserList):
def __init__(self, initlist=[], allowedElems=[]):
collections.UserList.__init__(self, [_f for _f in initlist if _f])
self.allowedElems = sorted(allowedElems)
def __cmp__(self, other):
raise NotImplementedError
def __eq__(self, other):
raise NotImplementedError
def __ge__(self, other):
raise NotImplementedError
def __gt__(self, other):
raise NotImplementedError
def __le__(self, other):
raise NotImplementedError
def __lt__(self, other):
raise NotImplementedError
def __str__(self):
if len(self) == 0:
return 'none'
self.data.sort()
if self.data == self.allowedElems:
return 'all'
else:
return ','.join(self)
def prepare_to_store(self):
return self.__str__()
def _converter(val, allowedElems, mapdict):
"""
"""
if val == 'none':
val = []
elif val == 'all':
val = allowedElems
else:
val = [_f for _f in val.split(',') if _f]
val = [mapdict.get(v, v) for v in val]
notAllowed = [v for v in val if v not in allowedElems]
if notAllowed:
raise ValueError("Invalid value(s) for option: %s" %
','.join(notAllowed))
return _ListVariable(val, allowedElems)
## def _validator(key, val, env):
## """
## """
## # todo: write validator for pgk list
## return 1
[docs]def ListVariable(key, help, default, names, map={}):
"""
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 (separated by space).
"""
names_str = 'allowed names: %s' % ' '.join(names)
if SCons.Util.is_List(default):
default = ','.join(default)
help = '\n '.join(
(help, '(all|none|comma-separated list of names)', names_str))
return (key, help, default,
None, #_validator,
lambda val: _converter(val, names, map))
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