mirror of https://gitlab.com/ita1024/waf.git
70 lines
1.7 KiB
Python
70 lines
1.7 KiB
Python
#! /usr/bin/env python
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# encoding: utf-8
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# Thomas Nagy, 2014-2015 (ita)
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"""
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Climb dependencies without using build groups and without annotating them.
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In practice, one may want to avoid this:
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* This adds some overhead as the task generators have to be searched and processed
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* This is also unlikely to work in the real-world (complex targets, not all dependencies are file-based, etc)
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* This also makes the dependencies more complicated to understand when reading a wscript file (what requires what?)
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This example will create "d.txt" and all the required files but no "aa*.txt".
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The target "john" is hard-coded below, just call "waf", or comment the line to call "waf --targets=john"
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"""
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VERSION='0.0.1'
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APPNAME='file_climbing'
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top = '.'
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out = 'build'
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def options(opt):
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return
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def configure(conf):
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return
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def build(bld):
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for i in range(10):
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bld(rule='cp ${SRC} ${TGT}', source='a.txt', target='aa%d.txt' % i)
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bld(rule='cp ${SRC} ${TGT}', source='a.txt', target='b.txt')
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bld(rule='cp ${SRC} ${TGT}', source='b.txt', target='c.txt')
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bld(rule='cp ${SRC} ${TGT}', source='c.txt', target='d.txt', name='john')
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# HERE
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bld.targets = 'john'
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import os
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from waflib import Utils
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from waflib.TaskGen import before_method, feature
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@feature('*')
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@before_method('process_source', 'process_rule')
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def post_other_task_generators_if_necessary(self):
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if not self.bld.targets:
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return
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if not getattr(self, 'source', None):
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return
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group = self.bld.get_group(self.bld.get_group_idx(self))
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for x in Utils.to_list(self.source):
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y = os.path.split(x)[1]
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for tg in group:
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if id(tg) == id(self):
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continue
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if getattr(tg, 'target', None):
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pass
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for target in Utils.to_list(tg.target):
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y2 = os.path.split(target)[1]
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if y == y2:
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tg.post()
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