usage-lib 3.2.1

Library for working with usage specs
Documentation 
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use std::process::Command;
use xx::process::check_status;
use xx::{XXError, XXResult};

pub(crate) fn sh(script: &str) -> XXResult<String> {
    #[cfg(unix)]
    let (shell, flag) = ("sh", "-c");

    #[cfg(windows)]
    let (shell, flag) = ("cmd", "/c");

    let output = Command::new(shell)
        .arg(flag)
        .arg(script)
        .stdin(std::process::Stdio::null())
        .stderr(std::process::Stdio::inherit())
        .env("__USAGE", env!("CARGO_PKG_VERSION"))
        .output()
        .map_err(|err| XXError::ProcessError(err, format!("{shell} {flag} {script}")))?;

    check_status(output.status)
        .map_err(|err| XXError::ProcessError(err, format!("{shell} {flag} {script}")))?;
    let stdout = String::from_utf8(output.stdout).expect("stdout is not utf-8");
    Ok(stdout)
}