mirror of https://gitlab.com/ita1024/waf.git
78 lines
2.1 KiB
Plaintext
78 lines
2.1 KiB
Plaintext
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#! /usr/bin/env python
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# encoding: utf-8
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# Thomas Nagy, 2010 (ita)
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VERSION='0.0.1'
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APPNAME='dynamic_header_test'
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top = '.'
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out = 'build'
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def options(opt):
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opt.load('compiler_cxx')
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def configure(conf):
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conf.load('compiler_cxx')
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def build(bld):
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bld.program(source='main.cpp', target='app', includes='.')
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# --------------------------------------------------------------------
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# Dynamic header creation, the file "a.h" from main.cpp is created
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# during the build. You may use this code sample to create more complicated
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# dynamic header generators
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from waflib import Task
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from waflib.Tools.cxx import cxx
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class test(Task.Task):
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run_str = 'touch ${TGT}'
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def runnable_status(self):
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ret = super(cxx, self).runnable_status()
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try:
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shared = self.generator.bld.shared_tasks
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except AttributeError:
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shared = self.generator.bld.shared_tasks = {}
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if ret != Task.ASK_LATER:
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add = False
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# first pass over the unresolved files found by the scanner
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for x in self.generator.bld.raw_deps[self.uid()]:
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if x == 'a.h':
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tgt = self.generator.path.find_or_declare(x)
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try:
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tsk = shared[tgt]
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except KeyError:
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tsk = shared[tgt] = self.generator.create_task('test', [], tgt)
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self.set_run_after(tsk)
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self.generator.bld.producer.outstanding.append(tsk)
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add = True
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if add:
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# remove cache entries to force a clean scanner execution
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delattr(self, 'cache_sig')
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self.generator.bld.cache_nd = {}
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del self.generator.bld.task_sigs[(self.uid(), 'imp')] # will have to rescan the C file
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return self.runnable_status()
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# second pass over the existing nodes - corresponding tasks are still necessary
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for x in self.generator.bld.node_deps[self.uid()]:
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if x.name == 'a.h':
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try:
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tsk = shared[x]
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except KeyError:
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tsk = shared[x] = self.generator.create_task('test', [], x)
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self.set_run_after(tsk)
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self.generator.bld.producer.outstanding.append(tsk)
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add = True
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if add:
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# no need to rescan anything, but recompute the signature after the dependent task is executed
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delattr(self, 'cache_sig')
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return self.runnable_status()
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return ret
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cxx.runnable_status = runnable_status
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