1
"""SCons.Variables.PathVariable
3
This file defines an option type for SCons implementing path settings.
5
To be used whenever a a user-specified path override should be allowed.
7
Arguments to PathVariable are:
8
option-name = name of this option on the command line (e.g. "prefix")
9
option-help = help string for option
10
option-dflt = default value for this option
11
validator = [optional] validator for option value. Predefined
14
PathAccept -- accepts any path setting; no validation
15
PathIsDir -- path must be an existing directory
16
PathIsDirCreate -- path must be a dir; will create
17
PathIsFile -- path must be a file
18
PathExists -- path must exist (any type) [default]
20
The validator is a function that is called and which
21
should return True or False to indicate if the path
22
is valid. The arguments to the validator function
23
are: (key, val, env). The key is the name of the
24
option, the val is the path specified for the option,
25
and the env is the env to which the Otions have been
36
opts.Add(PathVariable('qtdir',
37
'where the root of Qt is installed',
39
opts.Add(PathVariable('qt_includes',
40
'where the Qt includes are installed',
41
'$qtdir/includes', PathIsDirCreate))
42
opts.Add(PathVariable('qt_libraries',
43
'where the Qt library is installed',
49
# Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The SCons Foundation
51
# Permission is hereby granted, free of charge, to any person obtaining
52
# a copy of this software and associated documentation files (the
53
# "Software"), to deal in the Software without restriction, including
54
# without limitation the rights to use, copy, modify, merge, publish,
55
# distribute, sublicense, and/or sell copies of the Software, and to
56
# permit persons to whom the Software is furnished to do so, subject to
57
# the following conditions:
59
# The above copyright notice and this permission notice shall be included
60
# in all copies or substantial portions of the Software.
62
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
63
# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
64
# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
65
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
66
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
67
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
68
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
71
__revision__ = "src/engine/SCons/Variables/PathVariable.py 2013/03/03 09:48:35 garyo"
73
__all__ = ['PathVariable',]
80
class _PathVariableClass(object):
82
def PathAccept(self, key, val, env):
83
"""Accepts any path, no checking done."""
86
def PathIsDir(self, key, val, env):
87
"""Validator to check if Path is a directory."""
88
if not os.path.isdir(val):
89
if os.path.isfile(val):
90
m = 'Directory path for option %s is a file: %s'
92
m = 'Directory path for option %s does not exist: %s'
93
raise SCons.Errors.UserError(m % (key, val))
95
def PathIsDirCreate(self, key, val, env):
96
"""Validator to check if Path is a directory,
97
creating it if it does not exist."""
98
if os.path.isfile(val):
99
m = 'Path for option %s is a file, not a directory: %s'
100
raise SCons.Errors.UserError(m % (key, val))
101
if not os.path.isdir(val):
104
def PathIsFile(self, key, val, env):
105
"""validator to check if Path is a file"""
106
if not os.path.isfile(val):
107
if os.path.isdir(val):
108
m = 'File path for option %s is a directory: %s'
110
m = 'File path for option %s does not exist: %s'
111
raise SCons.Errors.UserError(m % (key, val))
113
def PathExists(self, key, val, env):
114
"""validator to check if Path exists"""
115
if not os.path.exists(val):
116
m = 'Path for option %s does not exist: %s'
117
raise SCons.Errors.UserError(m % (key, val))
119
def __call__(self, key, help, default, validator=None):
120
# NB: searchfunc is currenty undocumented and unsupported
122
The input parameters describe a 'path list' option, thus they
123
are returned with the correct converter and validator appended. The
124
result is usable for input to opts.Add() .
126
The 'default' option specifies the default path to use if the
127
user does not specify an override with this option.
129
validator is a validator, see this file for examples
131
if validator is None:
132
validator = self.PathExists
134
if SCons.Util.is_List(key) or SCons.Util.is_Tuple(key):
135
return (key, '%s ( /path/to/%s )' % (help, key[0]), default,
138
return (key, '%s ( /path/to/%s )' % (help, key), default,
141
PathVariable = _PathVariableClass()
145
# indent-tabs-mode:nil
147
# vim: set expandtab tabstop=4 shiftwidth=4: