Function build_data::set_RUST_CHANNEL

pub fn set_RUST_CHANNEL()

Sets the RUST_CHANNEL env variable to Rust channel used by the current build.

Call this from build.rs. Use env! in your main.rs to use the variable.

Possible values:

• "stable"
• "beta"
• "nightly"

Executes the rustc command.

Panics

Panics if it fails to get the value from rustc.