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# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
# vim: set filetype=python:
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
option('--enable-simple', help='Enable simple')
# Setting MOZ_WITH_ENV in the environment has the same effect as passing
# --enable-with-env.
option('--enable-with-env', env='MOZ_WITH_ENV', help='Enable with env')
# Optional values
option('--enable-values', nargs='*', help='Enable values')
# Everything supported in the Option class is supported in option(). Assume
# the tests of the Option class are extensive about this.
# Alternatively to --enable/--disable, there also is --with/--without. The
# difference is semantic only. Behavior is the same as --enable/--disable.
# When the option name starts with --disable/--without, the default is for
# the option to be enabled.
option('--without-thing', help='Build without thing')
# A --enable/--with option with a default of False is equivalent to a
# --disable/--without option. This can be used to change the defaults
# depending on e.g. the target or the built application.
option('--with-stuff', default=False, help='Build with stuff')
# Other kinds of arbitrary options are also allowed. This is effectively
# equivalent to --enable/--with, with no possibility of --disable/--without.
option('--option', env='MOZ_OPTION', help='Option')
# It is also possible to pass options through the environment only.
option(env='CC', nargs=1, help='C Compiler')
# Call the function when the --enable-simple option is processed, with its
# OptionValue as argument.
@depends('--enable-simple')
def simple(simple):
if simple:
return simple
set_config('ENABLED_SIMPLE', simple)
# There can be multiple functions depending on the same option.
@depends('--enable-simple')
def simple(simple):
return simple
set_config('SIMPLE', simple)
@depends('--enable-with-env')
def with_env(with_env):
return with_env
set_config('WITH_ENV', with_env)
# It doesn't matter if the dependency is on --enable or --disable
@depends('--disable-values')
def with_env2(values):
return values
set_config('VALUES', with_env2)
# It is possible to @depends on environment-only options.
@depends('CC')
def is_gcc(cc):
return cc and 'gcc' in cc[0]
set_config('IS_GCC', is_gcc)
# It is possible to depend on the result from another function.
@depends(with_env2)
def with_env3(values):
return values
set_config('VALUES2', with_env3)
# @depends functions can also return results for use as input to another
# @depends.
@depends(with_env3)
def with_env4(values):
return values
@depends(with_env4)
def with_env5(values):
return values
set_config('VALUES3', with_env5)
# The result from @depends functions can also be used as input to options.
# The result must be returned, not implied. The function must also depend
# on --help.
@depends('--enable-simple', '--help')
def simple(simple, help):
return 'simple' if simple else 'not-simple'
option('--with-returned-default', default=simple, help='Returned default')
@depends('--with-returned-default')
def default(value):
return value
set_config('DEFAULTED', default)
@depends('--enable-values', '--help')
def choices(values, help):
if len(values):
return {
'alpha': ('a', 'b', 'c'),
'numeric': ('0', '1', '2'),
}.get(values[0])
option('--returned-choices', choices=choices, help='Choices')
@depends('--returned-choices')
def returned_choices(values):
return values
set_config('CHOICES', returned_choices)
# All options must be referenced by some @depends function.
# It is possible to depend on multiple options/functions
@depends('--without-thing', '--with-stuff', with_env4, '--option')
def remainder(*args):
return args
set_config('REMAINDER', remainder)
# It is possible to include other files to extend the configuration script.
include('included.configure')
# It is also possible for the include file path to come from the result of a
# @depends function. That function needs to depend on '--help' like for option
# defaults and choices.
option('--enable-include', nargs=1, help='Include')
@depends('--enable-include', '--help')
def include_path(path, help):
return path[0] if path else None
include(include_path)
# Sandboxed functions can import from modules through the use of the @imports
# decorator.
# The order of the decorators matter: @imports needs to appear after other
# decorators.
option('--with-imports', nargs='?', help='Imports')
# A limited set of functions from os.path are exposed by default.
@depends('--with-imports')
def with_imports(value):
if len(value):
return hasattr(os.path, 'abspath')
set_config('HAS_ABSPATH', with_imports)
# It is still possible to import the full set from os.path.
# It is also possible to cherry-pick builtins.
@depends('--with-imports')
@imports('os.path')
def with_imports(value):
if len(value):
return hasattr(os.path, 'getatime')
set_config('HAS_GETATIME', with_imports)
@depends('--with-imports')
def with_imports(value):
if len(value):
return hasattr(os.path, 'getatime')
set_config('HAS_GETATIME2', with_imports)
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