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16
Cargo.lock
generated
16
Cargo.lock
generated
@ -1,16 +0,0 @@
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# This file is automatically @generated by Cargo.
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# It is not intended for manual editing.
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version = 3
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[[package]]
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name = "jshell"
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version = "0.1.0"
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dependencies = [
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"shell_completion",
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]
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[[package]]
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name = "shell_completion"
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version = "0.0.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "73937c192504363290613e241705a02dff92ae7c03f544e2a69bbef24cc1042c"
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@ -4,4 +4,3 @@ version = "0.1.0"
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edition = "2021"
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edition = "2021"
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[dependencies]
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[dependencies]
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shell_completion = "0.0.2"
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@ -1,6 +0,0 @@
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{
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"$schema": "https://docs.renovatebot.com/renovate-schema.json",
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"extends": [
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"local>Renovate/renovate-config"
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]
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}
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76
src/main.rs
76
src/main.rs
@ -1,75 +1,3 @@
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use std::{env, io::{stdin, stdout, Write}, path::Path, process::{Child, Command, Stdio}};
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fn main() {
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println!("Hello, world!");
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fn main(){
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loop {
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println!("");
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println!("{}", env::current_dir().unwrap().to_str().unwrap());
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print!("> ");
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let _ = stdout().flush();
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let mut input = String::new();
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stdin().read_line(&mut input).unwrap();
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// must be peekable so we know when we are on the last command
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let mut commands = input.trim().split(" | ").peekable();
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let mut previous_command = None;
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while let Some(command) = commands.next() {
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let mut parts = command.trim().split_whitespace();
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let command = parts.next().unwrap();
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let args = parts;
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match command {
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"cd" => {
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let new_dir = args.peekable().peek()
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.map_or("/", |x| *x);
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let root = Path::new(new_dir);
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if let Err(e) = env::set_current_dir(&root) {
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eprintln!("{}", e);
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}
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previous_command = None;
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},
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"exit" => return,
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command => {
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let stdin = previous_command
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.map_or(
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Stdio::inherit(),
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|output: Child| Stdio::from(output.stdout.unwrap())
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);
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let stdout = if commands.peek().is_some() {
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// there is another command piped behind this one
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// prepare to send output to the next command
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Stdio::piped()
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} else {
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// there are no more commands piped behind this one
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// send output to shell stdout
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Stdio::inherit()
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};
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let output = Command::new(command)
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.args(args)
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.stdin(stdin)
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.stdout(stdout)
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.spawn();
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match output {
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Ok(output) => { previous_command = Some(output); },
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Err(e) => {
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previous_command = None;
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eprintln!("{}", e);
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},
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};
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}
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}
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}
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if let Some(mut final_command) = previous_command {
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// block until the final command has finished
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let _ = final_command.wait();
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}
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}
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}
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}
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