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use crate::run::run;
use crate::verify::verify;
use clap::{crate_version, App, Arg, SubCommand};
use notify::DebouncedEvent;
use notify::{RecommendedWatcher, RecursiveMode, Watcher};
use std::ffi::OsStr;
use std::io::BufRead;
use std::sync::mpsc::channel;
use std::time::Duration;
use syntect::easy::HighlightFile;
use syntect::highlighting::{Style, ThemeSet};
use syntect::parsing::SyntaxSet;
use syntect::util::as_24_bit_terminal_escaped;
mod run;
mod util;
mod verify;
fn main() {
let matches = App::new("rustlings")
.version(crate_version!())
.author("Olivia Hugger, Carol Nichols")
.about("Rustlings is a collection of small exercises to get you used to writing and reading Rust code")
.subcommand(SubCommand::with_name("verify").alias("v").about("Verifies all exercises according to the recommended order"))
.subcommand(SubCommand::with_name("watch").alias("w").about("Reruns `verify` when files were edited"))
.subcommand(
SubCommand::with_name("run")
.alias("r")
.about("Runs/Tests a single exercise")
.arg(Arg::with_name("file").required(true).index(1))
.arg(Arg::with_name("test").short("t").long("test").help("Run the file as a test")),
)
.get_matches();
let ss = SyntaxSet::load_defaults_newlines();
let ts = ThemeSet::load_defaults();
if None == matches.subcommand_name() {
println!();
println!(r#" welcome to... "#);
println!(r#" _ _ _ "#);
println!(r#" _ __ _ _ ___| |_| (_)_ __ __ _ ___ "#);
println!(r#" | '__| | | / __| __| | | '_ \ / _` / __| "#);
println!(r#" | | | |_| \__ \ |_| | | | | | (_| \__ \ "#);
println!(r#" |_| \__,_|___/\__|_|_|_| |_|\__, |___/ "#);
println!(r#" |___/ "#);
println!();
}
if let Some(matches) = matches.subcommand_matches("run") {
run(matches.clone()).unwrap();
}
if matches.subcommand_matches("verify").is_some() {
match verify(None) {
Ok(_) => {}
Err(_) => std::process::exit(1),
}
}
if matches.subcommand_matches("watch").is_some() {
watch().unwrap();
}
if matches.subcommand_name().is_none() {
let mut highlighter =
HighlightFile::new("default_out.md", &ss, &ts.themes["base16-eighties.dark"]).unwrap();
for maybe_line in highlighter.reader.lines() {
let line = maybe_line.unwrap();
let regions: Vec<(Style, &str)> = highlighter.highlight_lines.highlight(&line, &ss);
println!("{}", as_24_bit_terminal_escaped(®ions[..], true));
}
}
println!("\x1b[0m");
}
fn watch() -> notify::Result<()> {
let (tx, rx) = channel();
let mut watcher: RecommendedWatcher = Watcher::new(tx, Duration::from_secs(2))?;
watcher.watch("./exercises", RecursiveMode::Recursive)?;
let _ignored = verify(None);
loop {
match rx.recv() {
Ok(event) => match event {
DebouncedEvent::Create(b) | DebouncedEvent::Chmod(b) | DebouncedEvent::Write(b) => {
if b.extension() == Some(OsStr::new("rs")) {
let _ignored = verify(Some(b.as_path().to_str().unwrap()));
}
}
_ => {}
},
Err(e) => println!("watch error: {:?}", e),
}
}
}
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