waf

FORK: waf with some random patches
git clone https://git.neptards.moe/neptards/waf.git
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md5_tstamp.py (963B)

      1 #! /usr/bin/env python
      2 # encoding: utf-8
      3 
      4 """
      5 Re-calculate md5 hashes of files only when the file time have changed::
      6 
      7 	def options(opt):
      8 		opt.load('md5_tstamp')
      9 
     10 The hashes can also reflect either the file contents (STRONGEST=True) or the
     11 file time and file size.
     12 
     13 The performance benefits of this module are usually insignificant.
     14 """
     15 
     16 import os, stat
     17 from waflib import Utils, Build, Node
     18 
     19 STRONGEST = True
     20 
     21 Build.SAVED_ATTRS.append('hashes_md5_tstamp')
     22 def h_file(self):
     23 	filename = self.abspath()
     24 	st = os.stat(filename)
     25 
     26 	cache = self.ctx.hashes_md5_tstamp
     27 	if filename in cache and cache[filename][0] == st.st_mtime:
     28 		return cache[filename][1]
     29 
     30 	if STRONGEST:
     31 		ret = Utils.h_file(filename)
     32 	else:
     33 		if stat.S_ISDIR(st[stat.ST_MODE]):
     34 			raise IOError('Not a file')
     35 		ret = Utils.md5(str((st.st_mtime, st.st_size)).encode()).digest()
     36 
     37 	cache[filename] = (st.st_mtime, ret)
     38 	return ret
     39 h_file.__doc__ = Node.Node.h_file.__doc__
     40 Node.Node.h_file = h_file
     41