From 1c6a3107e9200fdc6441fb9c714a2e99d79c1293 Mon Sep 17 00:00:00 2001
From: El-BG-1970 <elouangros@hotmail.com>
Date: Tue, 26 Apr 2022 21:44:56 +0200
Subject: first commit

---
 src/main.rs | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 src/main.rs

(limited to 'src/main.rs')

diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..31133da
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,55 @@
+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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