blob: ec0b9ea4a443ffc94365a52decb5f18034de6eb6 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
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).unwrap() == '~' => w.replace("~", env::var("HOME").unwrap().as_str()),
w if w.chars().nth(0).unwrap() == '$' => 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 tmp = line.trim().split_whitespace()
.collect::<Vec<&str>>();
let mut parts = tmp.iter()
.map(|x| substitute_vars(*x));
let command = parts.next().unwrap();
match command.as_str() {
"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 cd = Path::new(&p);
env::set_current_dir(&cd)?;
}
};
},
command => {
let child = Command::new(command)
.args(parts)
.spawn();
match child {
Ok(mut child) => { child.wait()?; },
Err(e) => eprintln!("{}", e)
}
}
}
}
}
|
