How do I use Runfiles with rust?

[SvenFinn]

Hi everyone,

I’m working on Rust integration tests using Bazel with rules_rust. I want my tests to read some test data files at runtime, and ideally, they should also work when running via cargo test.

I’ve seen references to a runfiles crate, but the documentation is scarce and a bit confusing. Specifically:

• How do I properly use Runfiles in a Rust test under Bazel?
• Do I need to add anything to Cargo.toml or the BUILD.bazel file?
• How can I make the test code compatible with both Bazel and Cargo?

Thanks!