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50 lines
1.4 KiB
Python
50 lines
1.4 KiB
Python
#! /usr/bin/env python
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# encoding: utf-8
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"""
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Modification to handle folders as if they were files.
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Usually, the target folders are created automatically (Node.find_or_declare)
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for files that need them so this is not really necessary.
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This modification incurs a performance penalty (computing hashes,
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creating additional tasks, checking if the folders are there
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vs just creating the folders if missing), and can conceal serious
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errors (confusing files and folders for example).
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The build order will not look at the parent folder relationships,
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we will need a testcase for this (overriding the function
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Task.set_file_constraints is trivial)
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"""
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import stat
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from waflib import Utils, Task
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from waflib.TaskGen import feature
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def h_file(filename):
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"""now folders can have a signature too"""
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st = os.stat(filename)
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if stat.S_ISDIR(st[stat.ST_MODE]):
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return Utils.md5(filename).digest()
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m = Utils.md5()
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m.update(str(st.st_mtime))
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m.update(str(st.st_size))
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m.update(filename)
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return m.digest()
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Utils.h_file = h_file
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@feature('mkdir')
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def make_target_folder(self):
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"""code provided as an example"""
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try:
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node = self.target
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except AttributeError:
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raise self.bld.errors.WafError('Missing target attribute on task generator %r' % self)
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self.create_task('mkdir', [], node)
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class mkdir(Task.Task):
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"""calling node.mkdir() will be more efficient than creating folders"""
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def run(self):
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self.outputs[0].mkdir()
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