While applying the Salt state roles/devserver on ysul for T2315, the deployment failed with the following error:

failed: Jinja variable 'salt.utils.templates.AliasedLoader object' has no attribute 'rust.get_rustc_triplet'

At first, I suspected an issue with Salt module synchronization. So I ran saltutil.sync_modules, but the problem persisted.

I then investigated further:

• The function rust.get_rustc_triplet is indeed defined in _modules/rust.py in the repository.
• However, sys.list_functions rust returned nothing, meaning the module was not loaded.

Looking into the module rust.py implementation, I identified the cause:

def __virtual__():
    return (
        path_which("rustc") is not None,
        "The Rust execution module cannot be loaded: rustc not installed.",
    )

The module is only loaded if the rustc binary is available on the system.

On ysul, rustc is not installed, so we need to install it with Salt