watchrobot/modules/waf/playground/test_fail/wscript

#! /usr/bin/env python
# encoding: utf-8
# Thomas Nagy, 2011 (ita)

"""
Map a compilation failure to a successs status. People playing with C++ templates
might need this.
"""

top = '.'
out = 'build'

def options(opt):
	opt.load('compiler_cxx')

def configure(conf):
	conf.load('compiler_cxx')

def build(bld):
	bld.objects(source='success.cpp', target='ok')
	bld.objects(source='fail.cpp', target='fail', features='fail')

##################################################################
# the feature 'fail' is defined below

from waflib.Tools.cxx import cxx

# our task class
class cxxfail(cxx):
	def run(self):
		ret = super(cxxfail, self).run()
		self.outputs[0].write('just a simulation')
		return not ret

# @extension would apply this to all through TaskGen.mappings
def one_more_mapping(self, node):
	return self.create_compiled_task('cxxfail', node)

from waflib.TaskGen import feature, before
@before('process_source')
@feature('fail')
def remap_failure_to_success(self):
	# override
	self.mappings = dict(self.mappings)
	# then change the extension processing
	self.mappings['.cpp'] = one_more_mapping