slow_qt4.py (2814B)
1 #! /usr/bin/env python 2 # Thomas Nagy, 2011 (ita) 3 4 """ 5 Create _moc.cpp files 6 7 The builds are 30-40% faster when .moc files are included, 8 you should NOT use this tool. If you really 9 really want it: 10 11 def configure(conf): 12 conf.load('compiler_cxx qt4') 13 conf.load('slow_qt4') 14 15 See playground/slow_qt/wscript for a complete example. 16 """ 17 18 from waflib.TaskGen import extension 19 from waflib import Task 20 import waflib.Tools.qt4 21 import waflib.Tools.cxx 22 23 @extension(*waflib.Tools.qt4.EXT_QT4) 24 def cxx_hook(self, node): 25 return self.create_compiled_task('cxx_qt', node) 26 27 class cxx_qt(Task.classes['cxx']): 28 def runnable_status(self): 29 ret = Task.classes['cxx'].runnable_status(self) 30 if ret != Task.ASK_LATER and not getattr(self, 'moc_done', None): 31 32 try: 33 cache = self.generator.moc_cache 34 except AttributeError: 35 cache = self.generator.moc_cache = {} 36 37 deps = self.generator.bld.node_deps[self.uid()] 38 for x in [self.inputs[0]] + deps: 39 if x.read().find('Q_OBJECT') > 0: 40 41 # process "foo.h -> foo.moc" only if "foo.cpp" is in the sources for the current task generator 42 # this code will work because it is in the main thread (runnable_status) 43 if x.name.rfind('.') > -1: # a .h file... 44 name = x.name[:x.name.rfind('.')] 45 for tsk in self.generator.compiled_tasks: 46 if tsk.inputs and tsk.inputs[0].name.startswith(name): 47 break 48 else: 49 # no corresponding file, continue 50 continue 51 52 # the file foo.cpp could be compiled for a static and a shared library - hence the %number in the name 53 cxx_node = x.parent.get_bld().make_node(x.name.replace('.', '_') + '_%d_moc.cpp' % self.generator.idx) 54 if cxx_node in cache: 55 continue 56 cache[cxx_node] = self 57 58 tsk = Task.classes['moc'](env=self.env, generator=self.generator) 59 tsk.set_inputs(x) 60 tsk.set_outputs(cxx_node) 61 62 if x.name.endswith('.cpp'): 63 # moc is trying to be too smart but it is too dumb: 64 # why forcing the #include when Q_OBJECT is in the cpp file? 65 gen = self.generator.bld.producer 66 gen.outstanding.append(tsk) 67 gen.total += 1 68 self.set_run_after(tsk) 69 else: 70 cxxtsk = Task.classes['cxx'](env=self.env, generator=self.generator) 71 cxxtsk.set_inputs(tsk.outputs) 72 cxxtsk.set_outputs(cxx_node.change_ext('.o')) 73 cxxtsk.set_run_after(tsk) 74 75 try: 76 self.more_tasks.extend([tsk, cxxtsk]) 77 except AttributeError: 78 self.more_tasks = [tsk, cxxtsk] 79 80 try: 81 link = self.generator.link_task 82 except AttributeError: 83 pass 84 else: 85 link.set_run_after(cxxtsk) 86 link.inputs.extend(cxxtsk.outputs) 87 link.inputs.sort(key=lambda x: x.abspath()) 88 89 self.moc_done = True 90 91 for t in self.run_after: 92 if not t.hasrun: 93 return Task.ASK_LATER 94 95 return ret 96