qshell: Command-running macro

sh is a macro for running external commands. It provides functionality to pipe the input and output to variables as well as using rust expressions as arguments to the program.

lib.rs:

Examples

let world = "world";
let mut out = String::new();
sh!(echo hello {world} > {out});
assert_eq!(out, "hello world\n");

let world = "world";
let mut out = String::new();
sh!(echo hello {world} > {out});
assert_eq!(out, "hello world\n");

For more information, see the documentation for [sh].