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#! /usr/bin/env python
# Thomas Nagy, 2011 (ita)
"""
Create _moc.cpp files
The builds are 30-40% faster when .moc files are included,
you should NOT use this tool. If you really
really want it:
def configure(conf):
conf.load('compiler_cxx qt4')
conf.load('slow_qt4')
See playground/slow_qt/wscript for a complete example.
"""
from waflib.TaskGen import extension
from waflib import Task
import waflib.Tools.qt4
import waflib.Tools.cxx
@extension(*waflib.Tools.qt4.EXT_QT4)
def cxx_hook(self, node):
return self.create_compiled_task('cxx_qt', node)
class cxx_qt(Task.classes['cxx']):
def runnable_status(self):
ret = Task.classes['cxx'].runnable_status(self)
if ret != Task.ASK_LATER and not getattr(self, 'moc_done', None):
try:
cache = self.generator.moc_cache
except AttributeError:
cache = self.generator.moc_cache = {}
deps = self.generator.bld.node_deps[self.uid()]
for x in [self.inputs[0]] + deps:
if x.read().find('Q_OBJECT') > 0:
# process "foo.h -> foo.moc" only if "foo.cpp" is in the sources for the current task generator
# this code will work because it is in the main thread (runnable_status)
if x.name.rfind('.') > -1: # a .h file...
name = x.name[:x.name.rfind('.')]
for tsk in self.generator.compiled_tasks:
if tsk.inputs and tsk.inputs[0].name.startswith(name):
break
else:
# no corresponding file, continue
continue
# the file foo.cpp could be compiled for a static and a shared library - hence the %number in the name
cxx_node = x.parent.get_bld().make_node(x.name.replace('.', '_') + '_%d_moc.cpp' % self.generator.idx)
if cxx_node in cache:
continue
cache[cxx_node] = self
tsk = Task.classes['moc'](env=self.env, generator=self.generator)
tsk.set_inputs(x)
tsk.set_outputs(cxx_node)
if x.name.endswith('.cpp'):
# moc is trying to be too smart but it is too dumb:
# why forcing the #include when Q_OBJECT is in the cpp file?
gen = self.generator.bld.producer
gen.outstanding.append(tsk)
gen.total += 1
self.set_run_after(tsk)
else:
cxxtsk = Task.classes['cxx'](env=self.env, generator=self.generator)
cxxtsk.set_inputs(tsk.outputs)
cxxtsk.set_outputs(cxx_node.change_ext('.o'))
cxxtsk.set_run_after(tsk)
try:
self.more_tasks.extend([tsk, cxxtsk])
except AttributeError:
self.more_tasks = [tsk, cxxtsk]
try:
link = self.generator.link_task
except AttributeError:
pass
else:
link.set_run_after(cxxtsk)
link.inputs.extend(cxxtsk.outputs)
link.inputs.sort(key=lambda x: x.abspath())
self.moc_done = True
for t in self.run_after:
if not t.hasrun:
return Task.ASK_LATER
return ret
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