Debian Wiki: > The "ReproducibleBuilds/MysteryByteIncrementInJarFiles" page has been changed > by HansChristophSteiner: > https://wiki.debian.org/ReproducibleBuilds/MysteryByteIncrementInJarFiles > > New page: > = mystery byte increments in jar format = > > I've been working on reproducible jars, and I have fixed the > timestamps by running the builds using `faketime`. Now the contents > of the jars are exactly the same when I unzip them, including the > timestamps, but the jars themselves do not have the same hash. Using > `vbindiff`, I can see a smattering of bytes that are different, with > almost always the same pattern: one build's byte will be +1 from the > others, i.e. one has 98 and the other has 99, or 56 and 57. It seems > that this byte is some kind of separator between class names.
Is this a relevant issue for Debian? Using sortjar or strip-nondeterminism in the build process makes faketime unneeded, but it should also takes care of file ordering and these weird bytes. The other options I can think of to solve jar related issues is to patch all tools building jar. -- Lunar .''`. lu...@debian.org : :Ⓐ : # apt-get install anarchism `. `'` `-
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