--- /dev/null
+"""SCons.Variables.PathVariable
+
+This file defines an option type for SCons implementing path settings.
+
+To be used whenever a a user-specified path override should be allowed.
+
+Arguments to PathVariable are:
+ option-name = name of this option on the command line (e.g. "prefix")
+ option-help = help string for option
+ option-dflt = default value for this option
+ validator = [optional] validator for option value. Predefined
+ validators are:
+
+ PathAccept -- accepts any path setting; no validation
+ PathIsDir -- path must be an existing directory
+ PathIsDirCreate -- path must be a dir; will create
+ PathIsFile -- path must be a file
+ PathExists -- path must exist (any type) [default]
+
+ The validator is a function that is called and which
+ should return True or False to indicate if the path
+ is valid. The arguments to the validator function
+ are: (key, val, env). The key is the name of the
+ option, the val is the path specified for the option,
+ and the env is the env to which the Otions have been
+ added.
+
+Usage example:
+
+ Examples:
+ prefix=/usr/local
+
+ opts = Variables()
+
+ opts = Variables()
+ opts.Add(PathVariable('qtdir',
+ 'where the root of Qt is installed',
+ qtdir, PathIsDir))
+ opts.Add(PathVariable('qt_includes',
+ 'where the Qt includes are installed',
+ '$qtdir/includes', PathIsDirCreate))
+ opts.Add(PathVariable('qt_libraries',
+ 'where the Qt library is installed',
+ '$qtdir/lib'))
+
+"""
+
+#
+# Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 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/PathVariable.py 5023 2010/06/14 22:05:46 scons"
+
+__all__ = ['PathVariable',]
+
+import os
+import os.path
+
+import SCons.Errors
+
+class _PathVariableClass(object):
+
+ def PathAccept(self, key, val, env):
+ """Accepts any path, no checking done."""
+ pass
+
+ def PathIsDir(self, key, val, env):
+ """Validator to check if Path is a directory."""
+ if not os.path.isdir(val):
+ if os.path.isfile(val):
+ m = 'Directory path for option %s is a file: %s'
+ else:
+ m = 'Directory path for option %s does not exist: %s'
+ raise SCons.Errors.UserError(m % (key, val))
+
+ def PathIsDirCreate(self, key, val, env):
+ """Validator to check if Path is a directory,
+ creating it if it does not exist."""
+ if os.path.isfile(val):
+ m = 'Path for option %s is a file, not a directory: %s'
+ raise SCons.Errors.UserError(m % (key, val))
+ if not os.path.isdir(val):
+ os.makedirs(val)
+
+ def PathIsFile(self, key, val, env):
+ """validator to check if Path is a file"""
+ if not os.path.isfile(val):
+ if os.path.isdir(val):
+ m = 'File path for option %s is a directory: %s'
+ else:
+ m = 'File path for option %s does not exist: %s'
+ raise SCons.Errors.UserError(m % (key, val))
+
+ def PathExists(self, key, val, env):
+ """validator to check if Path exists"""
+ if not os.path.exists(val):
+ m = 'Path for option %s does not exist: %s'
+ raise SCons.Errors.UserError(m % (key, val))
+
+ def __call__(self, key, help, default, validator=None):
+ # NB: searchfunc is currenty undocumented and unsupported
+ """
+ The input parameters describe a 'path list' option, thus they
+ are returned with the correct converter and validator appended. The
+ result is usable for input to opts.Add() .
+
+ The 'default' option specifies the default path to use if the
+ user does not specify an override with this option.
+
+ validator is a validator, see this file for examples
+ """
+ if validator is None:
+ validator = self.PathExists
+
+ if SCons.Util.is_List(key) or SCons.Util.is_Tuple(key):
+ return (key, '%s ( /path/to/%s )' % (help, key[0]), default,
+ validator, None)
+ else:
+ return (key, '%s ( /path/to/%s )' % (help, key), default,
+ validator, None)
+
+PathVariable = _PathVariableClass()
+
+# Local Variables:
+# tab-width:4
+# indent-tabs-mode:nil
+# End:
+# vim: set expandtab tabstop=4 shiftwidth=4:
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