feat: add command execution

src/execute.rs

@@ -0,0 +1,12 @@
+use std::{
+    io,
+    process::{Command, Stdio},
+};
+
+pub fn execute(command: &str, args: &[&str]) -> io::Result<()> {
+    let mut command = Command::new(command);
+    command.stdout(Stdio::piped()).args(args);
+    let handle = command.spawn()?;
+    io::copy(&mut handle.stdout.unwrap(), &mut io::stdout())?;
+    Ok(())
+}

src/main.rs

@@ -1,6 +1,8 @@
+mod execute;
 mod parse;
 mod prompt;
 
+use execute::execute;
 use parse::parse_line;
 use rustyline::error::ReadlineError;
 use rustyline::{Editor, Result};
@@ -17,9 +19,8 @@ fn main() -> Result<()> {
 
         match readline {
             Ok(line) => {
-                if let Err(e) = parse_line(&line) {
-                    println!("{}", e)
-                }
+                let (command, args) = parse_line(&line);
+                execute(command, &args)?;
             }
             Err(ReadlineError::Interrupted) => {
                 println!("CTRL-C");

src/parse.rs

@@ -1,22 +1,9 @@
-use std::{
-    io::{self, Write},
-    process::Command,
-};
-
-pub fn parse_line(line: &str) -> io::Result<()> {
+pub fn parse_line(line: &str) -> (&str, Vec<&str>) {
     let tokens = line.trim().split(' ').collect::<Vec<&str>>();
-    let mut args: &[&str] = &[];
+    let mut args: Vec<&str> = Vec::new();
     let command = tokens[0];
     if tokens.len() > 1 {
-        args = &tokens[1..];
+        args = tokens[1..].to_vec();
     }
-    let mut command = Command::new(command);
-
-    command.args(args);
-
-    let output = command.output()?;
-
-    io::stderr().write_all(&output.stderr)?;
-    io::stdout().write_all(&output.stdout)?;
-    Ok(())
+    (command, args)
 }