refactor: use thiserror instead of anyhow

[ematipico]

Closes #409

[ematipico]

Could you please run the CI for me? Unfortunately, I can't run the tests internally because some source code requires rustic nightly for some features, which I don't have installed (the contribution guide doesn't say anything about it).

[morgante]

Unfortunately looks like tests are failing. @ematipico Do you have more info on the rustic failure you're seeing? That wasn't a deliberate decision.

[ematipico]

Sure. I've had a couple of issues:

• The absence of rust-toolchain.toml; hence it wasn't possible to pin the version of the toolchain of the project (it was probably using my local version, which was outdated). I solved the issue, locally.
• This is the compiler error I get when running the tests:

   error[E0554]: `#![feature]` may not be used on the stable release channel
     --> /Users/ema/.cargo/registry/src/index.crates.io-6f17d22bba15001f/io-extras-0.18.1/src/lib.rs:19:33
      |
   19 | #![cfg_attr(can_vector, feature(can_vector))]
      |                                 ^^^^^^^^^^
   
   error[E0554]: `#![feature]` may not be used on the stable release channel
     --> /Users/ema/.cargo/registry/src/index.crates.io-6f17d22bba15001f/io-extras-0.18.1/src/lib.rs:20:41
      |
   20 | #![cfg_attr(write_all_vectored, feature(write_all_vectored))]
      |                                         ^^^^^^^^^^^^^^^^^^
  

[arendjr]

So if I understand correctly it’s because the io-extras crate depends on nightly? Maybe there’s a suitable alternative for it?

[ematipico]

So if I understand correctly it’s because the io-extras crate depends on nightly? Maybe there’s a suitable alternative for it?

I really don't know, to be honest. This is a dependency that is pulled by a feature called external_functions, which is part of the default features

[ematipico]

Any help @morgante ?

[morgante]

@ematipico I'm not sure about the root cause - do you want me to take over cleaning up this PR?

[ematipico]

The issue is caused by the feature external_functions, which pulls io-extras , which uses nightly features. Is it expected?

By disabling that feature, I can run tests and run clippy. Can move forward with the PR, but I realised there's more work to do, especially in other crates.

I will commit my changes so you can evaluate the entity of the changes.

[ematipico]

Hey @morgante, unfortunately the error occurred again and I can't compile the project. Not sure why.

Feel free to take over the PR whenever you want

[morgante]

Continued in #453