Function libmacchina::extra::which

pub fn which<P>(program_name: P) -> bool where
    P: AsRef<Path>, 

Search all directories in PATH for a program e.g. ps, grep, etc.

This can be used to check if a particular program exists before running a command
that could return an error in case the program is not installed.

• Returns true if a given program is in PATH, and false if it isn’t.

Example

use libmacchina::extra::which;

if which("grep") {
    println!("grep is installed.");
} else {
    println!("grep is not installed.");
}