-fn rustc_sysroot_path() -> PathBuf {
- option_env!("SYSROOT")
- .map(String::from)
- .or_else(|| std::env::var("SYSROOT").ok())
- .or_else(|| {
- let home = option_env!("RUSTUP_HOME").or(option_env!("MULTIRUST_HOME"));
- let toolchain = option_env!("RUSTUP_TOOLCHAIN").or(option_env!("MULTIRUST_TOOLCHAIN"));
- home.and_then(|home| toolchain.map(|toolchain| format!("{}/toolchains/{}", home, toolchain)))
- })
- .or_else(|| {
- Command::new("rustc")
- .arg("--print")
- .arg("sysroot")
- .output()
- .ok()
- .and_then(|out| String::from_utf8(out.stdout).ok())
- .map(|s| s.trim().to_owned())
- })
- .expect("need to specify SYSROOT env var during clippy compilation, or use rustup or multirust")
- .into()