Some projects want to vendor and tightly control their toolchains. With rules_rust always registering toolchains when used through blzmod, it is easy to misconfigure a project's toolchain configuration and accidentally fallback on the rules_rust toolchains without knowing. Providing a way to explicitly disable the rules_rust toolchains would turn this case into and error instead of a silent fallback.
Some projects want to vendor and tightly control their toolchains. With
rules_rustalways registering toolchains when used through blzmod, it is easy to misconfigure a project's toolchain configuration and accidentally fallback on therules_rusttoolchains without knowing. Providing a way to explicitly disable therules_rusttoolchains would turn this case into and error instead of a silent fallback.