diff options
author | David Robillard <d@drobilla.net> | 2018-11-24 13:44:02 +0100 |
---|---|---|
committer | David Robillard <d@drobilla.net> | 2018-11-24 13:44:02 +0100 |
commit | d74de7f575a9ec49f96138c3c5251f28946c0c0e (patch) | |
tree | d9b620bfba1e7462df4ddb3f6225cc5216c0ca81 /Tools/md5_tstamp.py | |
parent | c6e874c2cc1c5c99a3859112e1bba0f07bcdb8ba (diff) | |
download | ganv-d74de7f575a9ec49f96138c3c5251f28946c0c0e.tar.gz ganv-d74de7f575a9ec49f96138c3c5251f28946c0c0e.tar.bz2 ganv-d74de7f575a9ec49f96138c3c5251f28946c0c0e.zip |
Squashed 'waflib/' changes from 6e726eb..5ea8f99
5ea8f99 Improve test output spacing
0e23b29 Raise exception when test suite fails to ensure non-zero exit status
d6de073 Show run time of unit tests
5b65554 Add short configure option for ultra-strict flags
4687ba6 Use gtest-like test output
258903d Fix failure count in test group summaries
da07e73 Fix verbose tests with Python 3
git-subtree-dir: waflib
git-subtree-split: 5ea8f99f6e1246079c1fe6bb590c38a53aadd40d
Diffstat (limited to 'Tools/md5_tstamp.py')
-rw-r--r-- | Tools/md5_tstamp.py | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/Tools/md5_tstamp.py b/Tools/md5_tstamp.py new file mode 100644 index 0000000..6428e46 --- /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 + |