cmd_lib 0.9.5

Common rust commandline macros and utils, to write shell script like tasks easily
Documentation 
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//
// Rewrite examples with rust_cmd_lib from
// https://rust-lang-nursery.github.io/rust-cookbook/os/external.html
//
use cmd_lib::{proc_env_set, run_cmd, run_fun, CmdResult};
fn main() -> CmdResult {
    proc_env_set!(CMD_LIB_DEBUG = 1); // to print commands

    // Run an external command and process stdout
    run_cmd!(git log --oneline | head -5)?;

    // Run an external command passing it stdin and check for an error code
    run_cmd!(echo "import this; copyright(); credits(); exit()" | python)?;

    // Run piped external commands
    let directory = std::env::current_dir()?;
    println!(
        "Top 10 biggest files and directories in '{}':\n{}",
        directory.display(),
        run_fun!(du -ah . | sort -hr | head -n 10).unwrap()
    );

    // Redirect both stdout and stderr of child process to the same file
    run_cmd!(ls . oops &>out.txt || true)?;

    // Continuously process child process' outputs
    run_cmd!(ping -c 5 www.google.com | awk r#"/time/ {print $(NF-3) " " $(NF-1) " " $NF}"#)?;

    // Read Environment Variable
    // use env::var the same as in cookbook
    // rust_cmd_lib also support scoped process environment variable:
    {
        proc_env_set!(PWD = "/tmp");
        run_cmd!(pwd)?;
    }
    run_cmd!(pwd)?;
    Ok(())
}