1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
|
# MIT License
#
# Copyright 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.
"""Variable type for enumeration Variables.
Enumeration variables allow selection of one from a specified set of values.
Usage example::
opts = Variables()
opts.Add(
EnumVariable(
'debug',
help='debug output and symbols',
default='no',
allowed_values=('yes', 'no', 'full'),
map={},
ignorecase=2,
)
)
...
if env['debug'] == 'full':
...
"""
from typing import Tuple, Callable
import SCons.Errors
__all__ = ['EnumVariable',]
def _validator(key, val, env, vals) -> None:
if val not in vals:
raise SCons.Errors.UserError(
'Invalid value for option %s: %s. Valid values are: %s' % (key, val, vals))
def EnumVariable(key, help, default, allowed_values, map={}, ignorecase=0) -> Tuple[str, str, str, Callable, Callable]:
"""Return a tuple describing an enumaration SCons Variable.
The input parameters describe an option with only certain values
allowed. Returns A tuple including an appropriate converter and
validator. The result is usable as input to :meth:`Add`.
*key* and *default* are passed directly on to :meth:`Add`.
*help* is the descriptive part of the help text,
and will have the allowed values automatically appended.
*allowed_values* is a list of strings, which are the allowed values
for this option.
The *map*-dictionary may be used for converting the input value
into canonical values (e.g. for aliases).
The value of *ignorecase* defines the behaviour of the validator:
* 0: the validator/converter are case-sensitive.
* 1: the validator/converter are case-insensitive.
* 2: the validator/converter is case-insensitive and the
converted value will always be lower-case.
The *validator* tests whether the value is in the list of allowed values.
The *converter* converts input values according to the given
*map*-dictionary (unmapped input values are returned unchanged).
"""
help = '%s (%s)' % (help, '|'.join(allowed_values))
# define validator
if ignorecase:
validator = lambda key, val, env: \
_validator(key, val.lower(), env, allowed_values)
else:
validator = lambda key, val, env: \
_validator(key, val, env, allowed_values)
# define converter
if ignorecase == 2:
converter = lambda val: map.get(val.lower(), val).lower()
elif ignorecase == 1:
converter = lambda val: map.get(val.lower(), val)
else:
converter = lambda val: map.get(val, val)
return (key, help, default, validator, converter)
# Local Variables:
# tab-width:4
# indent-tabs-mode:nil
# End:
# vim: set expandtab tabstop=4 shiftwidth=4:
|
