Fix javascript live preview for linux (#528)

* Fix javascript live preview and reduce live preview verbosity (watching an entire directory produces a lot of 'Cooldown' text)

src/commands/build/watch/mod.rs

@@ -14,6 +14,7 @@ use std::thread;
 use std::time::Duration;
 
 pub const COOLDOWN_PERIOD: Duration = Duration::from_millis(2000);
+const JAVASCRIPT_PATH: &str = "./";
 
 /// watch a project for changes and re-build it when necessary,
 /// outputting a build event to tx.
@@ -24,14 +25,14 @@ pub fn watch_and_build(
     let project_type = &project.project_type;
     match project_type {
         ProjectType::JavaScript => {
-            let package = Package::new("./")?;
-            let entry = package.main()?;
             thread::spawn(move || {
                 let (watcher_tx, watcher_rx) = mpsc::channel();
                 let mut watcher = notify::watcher(watcher_tx, Duration::from_secs(1)).unwrap();
 
-                watcher.watch(&entry, RecursiveMode::Recursive).unwrap();
-                message::info(&format!("watching {:?}", &entry));
+                watcher
+                    .watch(JAVASCRIPT_PATH, RecursiveMode::Recursive)
+                    .unwrap();
+                message::info(&format!("watching {:?}", &JAVASCRIPT_PATH));
 
                 loop {
                     match wait_for_changes(&watcher_rx, COOLDOWN_PERIOD) {

src/commands/build/watch/watcher.rs

@@ -8,7 +8,7 @@ use failure::{format_err, Error};
 use crate::terminal::message;
 use log::info;
 
-///Add cooldown for all types of events to watching logic
+/// Add cooldown for all types of events to watching logic
 pub fn wait_for_changes(
     rx: &Receiver<DebouncedEvent>,
     cooldown: Duration,
@@ -18,15 +18,12 @@ pub fn wait_for_changes(
         match get_changed_path_from_event(event) {
             Ok(Some(path)) => {
                 message::working("Detected changes...");
-                //wait for cooldown
-                while let Ok(_) = rx.recv_timeout(cooldown) {
-                    message::working("Detected change during cooldown...");
-                }
-                message::working("Cooldown over, propogating changes...");
+                // wait for cooldown
+                while let Ok(_) = rx.recv_timeout(cooldown) {}
                 return Ok(path);
             }
             Ok(None) => {
-                continue; //was an event type we don't care about, continue
+                continue; // was an event type we don't care about, continue
             }
             Err(error) => {
                 message::user_error(&format!("WatchError {:?}", error));