我想对SCons Builder输出进行一些后期处理:
env = Environment()
bld = Builder(action = 'postproc $SOURCE $TARGET')
env.Append(BUILDERS = {'PostProc': bld})
prog = env.Program('foo.c')
env.PostProc('foo.pp',prog)
这可以按预期工作。但是,我更喜欢使用一个Builder调用,所以我想我可以像这样嵌套它:
env = Environment()
bld = Builder(action = 'postproc $SOURCE $TARGET')
env.Append(BUILDERS = {'PostProc': bld})
def build_pp(env, target, source):
prog = env.Program(source)
return env.PostProc(target,prog)
bld2 = Builder(action = build_pp)
env.Append(BUILDERS = {'BuildPP': bld2})
env.BuildPP('foo.pp','foo.c')
但可理解的结果是:
scons: *** [foo.pp] Multiple ways to build the same target were specified for: foo.pp (from ['foo.c'] and from ['foo'])
知道如何实现这一目标吗?
答案 0 :(得分:4)
将几个构建器包装成一个构建器(可能与扩展参数解析等相结合)通常使用伪构建器完成。查看第20章" Pseudo-Builders:User Guide的AddMethod函数" 以及http://www.scons.org/wiki/ToolsForFools上的工具编写指南。