Rustler precompiled fails to verify NIF checksum

[inaniyants]

Hello and thanks for delivering such useful update as precompiled NIFs!

It looks like 0.7.0 release on hex contains wrong checksums file.
You can see, that some dependent packages are failing to update to 0.7.0 , like in this PR
poanetwork/ex_abi#122

I have few suggestions:

1. add checksums file to .gitignore, cause it doesn't need to be tracked in repo
2. add release script , which will ensure update of checksums before publish to hex. It can be simple Makefile

release:
    mix rustler_precompiled.download ExKeccak --all --print
    mix hex.publish --yes

then just make release.

In such way won't be needed to commit checksums on each release and won't forget to update it before publishing to hex.

[inaniyants]

And one side question.
It is still stated in Readme, that "ex_keccak requires Rust to be installed."

I believe with precompiled NIFs it is not required for library users, since rust code is already compiled.
Am I correct ?

[tzumby]

Hey @inaniyants,

Thanks for opening this and pointing the problem out! I missed that line in the README.md, I'll update, you definitely don't need Rust unless you want to force compile.

Let me do some digging here on the checksum. I definitely think publishing to hex would be nice as part of the action.

[tzumby]

It looks like the authors of the rustler-precompiled did intend for everyone to check-in the checksum file in the repos. That's what I saw in all the libraries that I checked as well. The mismatch is a problem for sure, I'm going to figure out a solution to make sure this doesn't happen in the future.

[inaniyants]

the authors of the rustler-precompiled did intend for everyone to check-in the checksum file in the repos'

I think there it is meant to include file into hex repo, but not into source code repo.

Here is ref, where I originally found recommendation to not include it to source code repo
https://github.com/philss/rustler_precompiled/blob/main/PRECOMPILATION_GUIDE.md

Note: you don't need to track the checksum file in your version control system (git or other).

[inaniyants]

I definitely think publishing to hex would be nice as part of the action.

Probably this will help
https://hex.pm/docs/publish#publishing-from-ci
but your hex key should be somewhere stored .
Does github provide this storage for secret keys ?

[tzumby]

I just pushed a 0.7.1 update with the right checksums, do you mind re-running your CI with the version bump to see if that fixes it ?

[inaniyants]

Yeah, new build is ok
poanetwork/ex_abi#123