matrix-rust-sdk

use std::{env, process};

fn env_is_set(var_name: &str) -> bool {

    env::var_os(var_name).is_some()

}

fn ensure(cond: bool, err: &str) {

    if !cond {

        eprintln!(

            "\n\

            ┏━━━━━━━━{pad}━┓\n\

            ┃ error: {err} ┃\n\

            ┗━━━━━━━━{pad}━┛\n\

            ",

            pad = "━".repeat(err.len()),

        );

        process::exit(1);

    }

}

fn main() {

    // Prevent unnecessary rerunning of this build script

    println!("cargo:rerun-if-changed=build.rs");

    let is_wasm = env::var_os("CARGO_CFG_TARGET_ARCH").is_some_and(|arch| arch == "wasm32");

    if is_wasm {

        ensure(

            !env_is_set("CARGO_FEATURE_SSO_LOGIN"),

            "feature 'sso-login' is not available on target arch 'wasm32'",

        );

    }

}