Ajout : modules command
control
et interface
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3 changed files with 86 additions and 0 deletions
33
src/command.rs
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33
src/command.rs
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use std::process::ExitStatus;
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pub trait Command {
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fn spawn(&self) -> ExitStatus;
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}
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pub struct UnixProgram {
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argv: Vec<String>,
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}
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impl UnixProgram {
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pub fn new() -> Self {
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Self { argv: Vec::new() }
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}
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pub fn argv(&mut self, argv: Vec<String>) -> &mut Self {
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self.argv = argv;
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self
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}
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}
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impl Command for UnixProgram {
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fn spawn(&self) -> ExitStatus {
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let mut argv = self.argv.clone();
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let program = argv.remove(0);
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let mut command = std::process::Command::new(program);
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command.args(argv);
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let mut handle = command.spawn().expect("error spawning the command");
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handle.wait().expect("error waiting for the child")
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}
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}
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32
src/control.rs
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32
src/control.rs
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use crate::command::Command;
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use crate::command::UnixProgram;
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use crate::interface::{get_user_input, print_prompt};
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fn exit() {
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println!("exit");
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std::process::exit(0);
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}
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pub fn run() {
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loop {
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print_prompt();
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let user_input = get_user_input();
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if user_input.is_some() {
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let user_input = user_input.unwrap();
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let argv: Vec<String> = user_input
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.split_whitespace()
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.map(|s| s.to_string())
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.collect();
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if !argv.is_empty() {
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UnixProgram::new().argv(argv).spawn();
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}
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} else {
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println!();
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exit();
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}
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}
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}
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21
src/interface.rs
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21
src/interface.rs
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use std::io::Write;
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use std::io::{stdin, stdout};
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pub fn print_prompt() {
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print!("$ ");
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stdout().flush().unwrap();
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}
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pub fn get_user_input() -> Option<String> {
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let mut user_input = String::new();
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let bytes_read = stdin()
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.read_line(&mut user_input)
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.expect("error reading user input");
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if bytes_read == 0 {
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None
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} else {
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Some(user_input)
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}
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}
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