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habitat-sh / habitat

Modern applications with built-in automation
https://www.habitat.sh
Apache License 2.0
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Use the failure crate for errors #6558

Open christophermaier opened 5 years ago

christophermaier commented 5 years ago

The failure crate (documentation here) provides a more modern approach to Rust error handling than the std::error::Error trait, while remaining backward compatible with it.

It has a lot of nice features, including lots of automatic trait derivation to reduce boilerplate, cause chaining, backtrace support, and context (which would be a huge win for making all the IO errors we can throw more intelligible).

We should dig into this crate to help improve our error handling story.

christophermaier commented 5 years ago

Might not want to use failure after all, based on https://users.rust-lang.org/t/the-state-of-error-handling-in-the-2018-edition/23263/26

If we could find a better way to deal with error context, at least for our I/O errors, that would be nice; that was really the most exciting thing about failure for me, anyway.

christophermaier commented 4 years ago

https://github.com/dtolnay/thiserror and https://github.com/dtolnay/anyhow are interesting new crates in this area to check out.

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