fn main()

in aws-lc-rs/build.rs [6:38]

• 27 lines of code
• 6 McCabe index (conditional complexity)

fn main() {
    let has_mutually_exclusive_features = cfg!(feature = "non-fips") && cfg!(feature = "fips");
    assert!(
        !has_mutually_exclusive_features,
        "`fips` and `non-fips` are mutually exclusive crate features."
    );

    println!("cargo:rustc-check-cfg=cfg(disable_slow_tests)");
    if let Ok(disable) = env::var("AWS_LC_RS_DISABLE_SLOW_TESTS") {
        if disable == "1" {
            println!("cargo:warning=### Slow tests will be disabled! ###");
            println!("cargo:rustc-cfg=disable_slow_tests");
        } else {
            println!("cargo:warning=### Slow tests are enabled: {disable}! ###");
        }
    }
    println!("cargo:rerun-if-env-changed=AWS_LC_RS_DISABLE_SLOW_TESTS");

    // This appears asymmetric, but it reflects the `cfg` statements in lib.rs that
    // require `aws-lc-sys` to be present when "fips" is not enabled.
    // if `fips` is enabled, then use that
    let sys_crate = if cfg!(feature = "fips") {
        "aws-lc-fips-sys"
    } else if cfg!(feature = "aws-lc-sys") {
        "aws-lc-sys"
    } else {
        panic!(
            "one of the following features must be specified: `aws-lc-sys`, `non-fips`, or `fips`."
        );
    };

    export_sys_vars(sys_crate);
}