240 lines
8.3 KiB
Python
240 lines
8.3 KiB
Python
"""engine.SCons.Options
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This file defines the Options class that is used to add user-friendly
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customizable variables to an SCons build.
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"""
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#
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# Copyright (c) 2001, 2002, 2003, 2004 The SCons Foundation
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#
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# Permission is hereby granted, free of charge, to any person obtaining
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# a copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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#
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# The above copyright notice and this permission notice shall be included
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# in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
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# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
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# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#
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__revision__ = "/home/scons/scons/branch.0/baseline/src/engine/SCons/Options/__init__.py 0.96.1.D001 2004/08/23 09:55:29 knight"
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import os.path
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import SCons.Errors
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import SCons.Util
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import SCons.Warnings
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from BoolOption import BoolOption, True, False # okay
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from EnumOption import EnumOption # okay
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from ListOption import ListOption # naja
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from PackageOption import PackageOption # naja
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from PathOption import PathOption # okay
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class Options:
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"""
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Holds all the options, updates the environment with the variables,
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and renders the help text.
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"""
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def __init__(self, files=None, args={}):
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"""
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files - [optional] List of option configuration files to load
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(backward compatibility) If a single string is passed it is
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automatically placed in a file list
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"""
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self.options = []
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self.args = args
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self.files = None
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if SCons.Util.is_String(files):
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self.files = [ files ]
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elif files:
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self.files = files
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def _do_add(self, key, help="", default=None, validator=None, converter=None):
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class Option:
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pass
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option = Option()
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option.key = key
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option.help = help
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option.default = default
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option.validator = validator
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option.converter = converter
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self.options.append(option)
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def Add(self, key, help="", default=None, validator=None, converter=None, **kw):
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"""
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Add an option.
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key - the name of the variable, or a list or tuple of arguments
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help - optional help text for the options
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default - optional default value
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validator - optional function that is called to validate the option's value
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Called with (key, value, environment)
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converter - optional function that is called to convert the option's value before
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putting it in the environment.
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"""
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if SCons.Util.is_List(key) or type(key) == type(()):
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apply(self._do_add, key)
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return
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if not SCons.Util.is_String(key) or \
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not SCons.Util.is_valid_construction_var(key):
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raise SCons.Errors.UserError, "Illegal Options.Add() key `%s'" % str(key)
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if kw.has_key('validater'):
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SCons.Warnings.warn(SCons.Warnings.DeprecatedWarning,
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"The 'validater' keyword of the Options.Add() method is deprecated\n" +\
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"and should be changed to 'validator'.")
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if validator is None:
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validator = kw['validater']
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self._do_add(key, help, default, validator, converter)
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def AddOptions(self, *optlist):
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"""
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Add a list of options.
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Each list element is a tuple/list of arguments to be passed on
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to the underlying method for adding options.
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Example:
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opt.AddOptions(
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('debug', '', 0),
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('CC', 'The C compiler'),
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('VALIDATE', 'An option for testing validation', 'notset',
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validator, None),
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)
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"""
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for o in optlist:
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apply(self._do_add, o)
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def Update(self, env, args=None):
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"""
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Update an environment with the option variables.
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env - the environment to update.
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"""
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values = {}
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# first set the defaults:
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for option in self.options:
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if not option.default is None:
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values[option.key] = option.default
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# next set the value specified in the options file
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if self.files:
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for filename in self.files:
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if os.path.exists(filename):
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execfile(filename, values)
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# finally set the values specified on the command line
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if args is None:
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args = self.args
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values.update(args)
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# put the variables in the environment:
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# (don't copy over variables that are not declared
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# as options)
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for option in self.options:
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try:
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env[option.key] = values[option.key]
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except KeyError:
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pass
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# Call the convert functions:
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for option in self.options:
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if option.converter and values.has_key(option.key):
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value = env.subst('${%s}'%option.key)
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try:
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env[option.key] = option.converter(value)
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except ValueError, x:
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raise SCons.Errors.UserError, 'Error converting option: %s\n%s'%(option.key, x)
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# Finally validate the values:
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for option in self.options:
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if option.validator:
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option.validator(option.key, env.subst('${%s}'%option.key), env)
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def Save(self, filename, env):
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"""
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Saves all the options in the given file. This file can
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then be used to load the options next run. This can be used
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to create an option cache file.
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filename - Name of the file to save into
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env - the environment get the option values from
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"""
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# Create the file and write out the header
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try:
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fh = open(filename, 'w')
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try:
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# Make an assignment in the file for each option within the environment
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# that was assigned a value other than the default.
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for option in self.options:
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try:
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value = env[option.key]
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try:
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eval(repr(value))
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except KeyboardInterrupt:
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raise
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except:
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# Convert stuff that has a repr() that
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# cannot be evaluated into a string
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value = SCons.Util.to_String(value)
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if env.subst('${%s}' % option.key) != \
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env.subst(SCons.Util.to_String(option.default)):
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fh.write('%s = %s\n' % (option.key, repr(value)))
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except KeyError:
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pass
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finally:
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fh.close()
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except IOError, x:
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raise SCons.Errors.UserError, 'Error writing options to file: %s\n%s' % (filename, x)
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def GenerateHelpText(self, env, sort=None):
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"""
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Generate the help text for the options.
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env - an environment that is used to get the current values
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of the options.
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"""
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help_text = ""
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if sort:
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options = self.options[:]
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options.sort(lambda x,y,func=sort: func(x.key,y.key))
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else:
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options = self.options
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for option in options:
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help_text = help_text + '\n%s: %s\n default: %s\n'%(option.key, option.help, option.default)
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if env.has_key(option.key):
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help_text = help_text + ' actual: %s\n'%env.subst('${%s}'%option.key)
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else:
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help_text = help_text + ' actual: None\n'
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return help_text
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