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How to Contribute to Wasmer
Thank you for your interest in contributing to Wasmer. This document outlines some recommendations on how to contribute.
Issues & Feature Requests
Please use the issue template and provide a failing example if possible to help us recreate the issue.
Pull Requests
For large changes, please try reaching the Wasmer using Github Issues or Spectrum Chat to ensure we can accept the change once it is ready.
We recommend trying the following commands before sending a pull request to ensure code quality:
cargo fmt --all
Ensures all code is correctly formatted.- Run
cargo test
in the crates that you are modifying. - Run
cargo build --all
(nightly) orcargo build --all --exclude wasmer-singlepass-backend
A comprehensive CI test suite will be run by a Wasmer team member after the PR has been created.
Common Build Issues
LLVM Dependency
The LLVM backend requires LLVM to be installed to compile.
So, you may run into the following error:
Didn't find usable system-wide LLVM.
No suitable version of LLVM was found system-wide or pointed
Singlepass Nightly Only
The singlepass crate depends on nightly so you may need to add the +nightly
cargo flag to compile this crate.
error[E0554]: #![feature] may not be used on the stable release channel