225 lines
8 KiB
Rust
225 lines
8 KiB
Rust
use crate::exercise::{Exercise, ExerciseList};
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use crate::run::run;
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use crate::verify::verify;
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use clap::{crate_version, App, Arg, SubCommand};
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use console::Emoji;
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use notify::DebouncedEvent;
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use notify::{RecommendedWatcher, RecursiveMode, Watcher};
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use std::ffi::OsStr;
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use std::fs;
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use std::io;
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use std::path::Path;
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use std::process::{Command, Stdio};
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use std::sync::mpsc::channel;
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use std::sync::{Arc, Mutex};
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use std::thread;
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use std::time::Duration;
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#[macro_use]
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mod ui;
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mod exercise;
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mod run;
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mod verify;
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fn main() {
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let matches = App::new("rustlings")
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.version(crate_version!())
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.author("Olivia Hugger, Carol Nichols")
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.about("Rustlings is a collection of small exercises to get you used to writing and reading Rust code")
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.arg(
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Arg::with_name("nocapture")
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.long("nocapture")
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.help("Show outputs from the test exercises")
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)
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.subcommand(
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SubCommand::with_name("verify")
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.alias("v")
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.about("Verifies all exercises according to the recommended order")
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)
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.subcommand(
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SubCommand::with_name("watch")
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.alias("w")
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.about("Reruns `verify` when files were edited")
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)
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.subcommand(
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SubCommand::with_name("run")
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.alias("r")
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.about("Runs/Tests a single exercise")
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.arg(Arg::with_name("name").required(true).index(1)),
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)
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.subcommand(
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SubCommand::with_name("hint")
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.alias("h")
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.about("Returns a hint for the current exercise")
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.arg(Arg::with_name("name").required(true).index(1)),
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)
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.get_matches();
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if matches.subcommand_name().is_none() {
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println!();
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println!(r#" welcome to... "#);
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println!(r#" _ _ _ "#);
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println!(r#" _ __ _ _ ___| |_| (_)_ __ __ _ ___ "#);
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println!(r#" | '__| | | / __| __| | | '_ \ / _` / __| "#);
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println!(r#" | | | |_| \__ \ |_| | | | | | (_| \__ \ "#);
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println!(r#" |_| \__,_|___/\__|_|_|_| |_|\__, |___/ "#);
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println!(r#" |___/ "#);
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println!();
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}
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if !Path::new("info.toml").exists() {
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println!(
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"{} must be run from the rustlings directory",
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std::env::current_exe().unwrap().to_str().unwrap()
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);
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println!("Try `cd rustlings/`!");
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std::process::exit(1);
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}
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if !rustc_exists() {
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println!("We cannot find `rustc`.");
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println!("Try running `rustc --version` to diagnose your problem.");
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println!("For instructions on how to install Rust, check the README.");
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std::process::exit(1);
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}
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let toml_str = &fs::read_to_string("info.toml").unwrap();
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let exercises = toml::from_str::<ExerciseList>(toml_str).unwrap().exercises;
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let verbose = matches.is_present("nocapture");
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if let Some(ref matches) = matches.subcommand_matches("run") {
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let name = matches.value_of("name").unwrap();
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let matching_exercise = |e: &&Exercise| name == e.name;
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let exercise = exercises.iter().find(matching_exercise).unwrap_or_else(|| {
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println!("No exercise found for your given name!");
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std::process::exit(1)
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});
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run(&exercise, verbose).unwrap_or_else(|_| std::process::exit(1));
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}
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if let Some(ref matches) = matches.subcommand_matches("hint") {
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let name = matches.value_of("name").unwrap();
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let exercise = exercises
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.iter()
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.find(|e| name == e.name)
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.unwrap_or_else(|| {
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println!("No exercise found for your given name!");
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std::process::exit(1)
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});
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println!("{}", exercise.hint);
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}
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if matches.subcommand_matches("verify").is_some() {
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verify(&exercises, verbose).unwrap_or_else(|_| std::process::exit(1));
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}
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if matches.subcommand_matches("watch").is_some() {
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if let Err(e) = watch(&exercises, verbose) {
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println!("Error: Could not watch your progess. Error message was {:?}.", e);
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println!("Most likely you've run out of disk space or your 'inotify limit' has been reached.");
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std::process::exit(1);
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}
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println!(
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"{emoji} All exercises completed! {emoji}",
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emoji = Emoji("🎉", "★")
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);
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println!();
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println!("We hope you enjoyed learning about the various aspects of Rust!");
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println!("If you noticed any issues, please don't hesitate to report them to our repo.");
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println!("You can also contribute your own exercises to help the greater community!");
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println!();
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println!("Before reporting an issue or contributing, please read our guidelines:");
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println!("https://github.com/rust-lang/rustlings/blob/main/CONTRIBUTING.md");
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}
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if matches.subcommand_name().is_none() {
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let text = fs::read_to_string("default_out.txt").unwrap();
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println!("{}", text);
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}
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}
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fn spawn_watch_shell(failed_exercise_hint: &Arc<Mutex<Option<String>>>) {
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let failed_exercise_hint = Arc::clone(failed_exercise_hint);
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println!("Type 'hint' to get help or 'clear' to clear the screen");
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thread::spawn(move || loop {
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let mut input = String::new();
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match io::stdin().read_line(&mut input) {
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Ok(_) => {
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let input = input.trim();
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if input.eq("hint") {
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if let Some(hint) = &*failed_exercise_hint.lock().unwrap() {
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println!("{}", hint);
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}
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} else if input.eq("clear") {
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println!("\x1B[2J\x1B[1;1H");
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} else {
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println!("unknown command: {}", input);
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}
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}
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Err(error) => println!("error reading command: {}", error),
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}
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});
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}
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fn watch(exercises: &[Exercise], verbose: bool) -> notify::Result<()> {
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/* Clears the terminal with an ANSI escape code.
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Works in UNIX and newer Windows terminals. */
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fn clear_screen() {
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println!("\x1Bc");
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}
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let (tx, rx) = channel();
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let mut watcher: RecommendedWatcher = Watcher::new(tx, Duration::from_secs(2))?;
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watcher.watch(Path::new("./exercises"), RecursiveMode::Recursive)?;
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clear_screen();
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let to_owned_hint = |t: &Exercise| t.hint.to_owned();
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let failed_exercise_hint = match verify(exercises.iter(), verbose) {
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Ok(_) => return Ok(()),
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Err(exercise) => Arc::new(Mutex::new(Some(to_owned_hint(exercise)))),
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};
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spawn_watch_shell(&failed_exercise_hint);
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loop {
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match rx.recv() {
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Ok(event) => match event {
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DebouncedEvent::Create(b) | DebouncedEvent::Chmod(b) | DebouncedEvent::Write(b) => {
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if b.extension() == Some(OsStr::new("rs")) && b.exists() {
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let filepath = b.as_path().canonicalize().unwrap();
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let pending_exercises = exercises
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.iter()
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.skip_while(|e| !filepath.ends_with(&e.path));
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clear_screen();
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match verify(pending_exercises, verbose) {
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Ok(_) => return Ok(()),
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Err(exercise) => {
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let mut failed_exercise_hint = failed_exercise_hint.lock().unwrap();
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*failed_exercise_hint = Some(to_owned_hint(exercise));
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}
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}
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}
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}
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_ => {}
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},
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Err(e) => println!("watch error: {:?}", e),
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}
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}
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}
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fn rustc_exists() -> bool {
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Command::new("rustc")
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.args(&["--version"])
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.stdout(Stdio::null())
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.spawn()
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.and_then(|mut child| child.wait())
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.map(|status| status.success())
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.unwrap_or(false)
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}
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