[diffoscope] Which tool is generating the "comments" attribute in JSON?
Chris Lamb
chris at reproducible-builds.org
Tue Oct 15 15:27:47 UTC 2024
Hello Aman,
> I was running diffoscope on two Jimple
> <https://soot-oss.github.io/SootUp/v1.1.2/jimple/> files. As far as I
> could see from the docs, this syntax is not explicitly supported so
> diffoscope returns a line based diff. However, it also adds "comments:
> ["Ordering differences only"]"
> <https://github.com/chains-project/by-the-pool/blob/main/ground-truth/1/jNorm/diffoscope.json>
> which is quite cool. How is this being implemented? And what are the
> possible comments?
It's actually quite a straightforward bit of code that's built into
diffoscope itself. Here's the actual implementation:
https://salsa.debian.org/reproducible-builds/diffoscope/-/blob/master/diffoscope/difference.py#L428
… although you might also spot that a few lines above, we do some
linear-time optimisations to avoid sorting the lines as that scales by
NlogN.
Hope this helps!
Best wishes,
--
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⬋ ⬊ Chris Lamb
o o reproducible-builds.org 💠
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