blob: 31133da6a65d74c25a2c66f74f8a5a04eb88eea7 (
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use std::io::{self,stdin,stdout,Write};
use std::str::FromStr;
use std::process::{Command};
use std::env;
use std::path::Path;
fn substitute_vars(word: &str) -> String {
match word {
"~" => env::var("HOME").unwrap(),
w if w.chars().nth(0) == Some('$') => String::from_str(w).unwrap(),
w => String::from_str(w).unwrap()
}
}
fn main() -> io::Result<()> {
loop {
stdout().write_all(b"> ")?;
stdout().flush()?;
let mut line = String::new();
stdin().read_line(&mut line).unwrap();
let mut parts = line.trim().split_whitespace();
let command = parts.next().unwrap();
match command {
"exit" => return Ok(()),
"cd" => {
// change directory
match parts.next() {
None => {
let home = env::var("HOME").unwrap();
let cd = Path::new(home.as_str());
env::set_current_dir(&cd)?;
},
Some(p) => {
let tmp = substitute_vars(p);
let cd = Path::new(&tmp);
env::set_current_dir(&cd)?;
}
};
},
command => {
let child = Command::new(command)
.args(parts.map(substitute_vars))
.spawn();
match child {
Ok(mut child) => { child.wait()?; },
Err(e) => eprintln!("{}", e)
}
}
}
}
}
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