Merge pull request #1 from nils865/main

Added basic shell functionality

Cargo.toml

@@ -6,3 +6,4 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+colored = "2.0.4"

README.md

@@ -4,7 +4,7 @@ A new Shell written in rust
 
 ## Roadmap
 
-- [ ] Add basic shell functionality
+- [X] Add basic shell functionality
 - [ ] Reimplement alot of basic shell features
   - [ ] echo
   - [ ] ls

src/commands.rs

@@ -0,0 +1,57 @@
+use std::process::Command;
+
+fn syscalls(args: Vec<&str>) -> i8 {
+    let mut cmd_args: Vec<String> = vec![];
+
+    let mut i = 1;
+
+    while i < args.len() {
+        let mut arg: String = args[i].to_string();
+
+        if arg.starts_with("\"") {
+            i += 1;
+
+            for j in i..args.len() {
+                arg = format!("{} {}", arg, args[j]);
+
+                if arg.ends_with("\"") {
+                    break;
+                }
+
+                i += 1;
+            }
+        }
+
+        cmd_args.push(arg);
+
+        i += 1;
+    }
+
+    let mut cmd = Command::new(args[0]);
+
+    if cmd_args.len() > 0 {
+        cmd.args(&cmd_args);
+    }
+
+    return match cmd.status() {
+        Ok(status) => {
+            if status.success() {
+                0
+            } else {
+                1
+            }
+        }
+        Err(_) => {
+            println!("Command not found: {}", args[0]);
+            1
+        }
+    };
+}
+
+pub fn input_handler(args: Vec<&str>) -> i8 {
+    match args[0] {
+        "exit" => return -1,
+
+        _ => return syscalls(args),
+    }
+}

src/main.rs

@@ -1,3 +1,30 @@
+use std::io::{stdin, stdout, Write};
+
+mod commands;
+mod prompt;
+
+use commands::input_handler;
+use prompt::get_prompt;
+
 fn main() {
-    println!("Hello, world!");
+    let running = true;
+    let mut exit_code: i8 = 0;
+
+    while running {
+        let mut command = String::new();
+
+        print!("{}", get_prompt(exit_code));
+        stdout().flush().expect("Failed to flush stdout");
+        stdin()
+            .read_line(&mut command)
+            .expect("Failed to read line");
+
+        let args: Vec<&str> = command.trim().split(" ").collect();
+
+        exit_code = input_handler(args);
+
+        if exit_code == -1 {
+            break;
+        }
+    }
 }

src/prompt.rs

@@ -0,0 +1,13 @@
+use colored::Colorize;
+
+pub fn get_prompt(exit_code: i8) -> String {
+    let mut prompt = String::new();
+
+    if exit_code == 0 {
+        prompt.push_str(&"➜ ".green().to_string());
+    } else {
+        prompt.push_str(&"➜ ".red().to_string());
+    }
+
+    return prompt;
+}