From a7d83f19b08eb4c6f79a82fe60c2b86db13f4420 Mon Sep 17 00:00:00 2001 From: David Robillard Date: Sat, 24 Nov 2018 13:44:03 +0100 Subject: Squashed 'waflib/' changes from 6e726eb1..5ea8f99f 5ea8f99f Improve test output spacing 0e23b29f Raise exception when test suite fails to ensure non-zero exit status d6de073b Show run time of unit tests 5b655541 Add short configure option for ultra-strict flags 4687ba6d Use gtest-like test output 258903d9 Fix failure count in test group summaries da07e738 Fix verbose tests with Python 3 git-subtree-dir: waflib git-subtree-split: 5ea8f99f6e1246079c1fe6bb590c38a53aadd40d --- Tools/md5_tstamp.py | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 Tools/md5_tstamp.py (limited to 'Tools/md5_tstamp.py') diff --git a/Tools/md5_tstamp.py b/Tools/md5_tstamp.py new file mode 100644 index 00000000..6428e460 --- /dev/null +++ b/Tools/md5_tstamp.py @@ -0,0 +1,39 @@ +#! /usr/bin/env python +# encoding: utf-8 + +""" +Re-calculate md5 hashes of files only when the file times or the file +size have changed. + +The hashes can also reflect either the file contents (STRONGEST=True) or the +file time and file size. + +The performance benefits of this module are usually insignificant. +""" + +import os, stat +from waflib import Utils, Build, Node + +STRONGEST = True + +Build.SAVED_ATTRS.append('hashes_md5_tstamp') +def h_file(self): + filename = self.abspath() + st = os.stat(filename) + + cache = self.ctx.hashes_md5_tstamp + if filename in cache and cache[filename][0] == st.st_mtime: + return cache[filename][1] + + if STRONGEST: + ret = Utils.h_file(filename) + else: + if stat.S_ISDIR(st[stat.ST_MODE]): + raise IOError('Not a file') + ret = Utils.md5(str((st.st_mtime, st.st_size)).encode()).digest() + + cache[filename] = (st.st_mtime, ret) + return ret +h_file.__doc__ = Node.Node.h_file.__doc__ +Node.Node.h_file = h_file + -- cgit v1.2.1