Replace fireworm with sane

lib/app.js

@@ -4,7 +4,6 @@ const EventEmitter = require('events').EventEmitter;
 const Bluebird = require('bluebird');
 const Path = require('path');
 const log = require('npmlog');
-const StyledString = require('styled_string');
 const find = require('lodash.find');
 
 const Server = require('./server');
@@ -321,17 +320,6 @@ module.exports = class App extends EventEmitter {
         });
       }
     });
-    this.fileWatcher.on('EMFILE', () => {
-      let view = this.view;
-      let text = [
-        'The file watcher received a EMFILE system error, which means that ',
-        'it has hit the maximum number of files that can be open at a time. ',
-        'Luckily, you can increase this limit as a workaround. See the directions below \n \n',
-        'Linux: http://stackoverflow.com/a/34645/5304\n',
-        'Mac OS: http://serverfault.com/a/15575/47234'
-      ].join('');
-      view.setErrorPopupMessage(new StyledString(text + '\n ').foreground('megenta'));
-    });
 
     return Bluebird.resolve().asCallback(cb);
   }

lib/file_watcher.js

@@ -1,51 +1,59 @@
 'use strict';
 
-const fireworm = require('fireworm');
+const sane = require('sane');
 const EventEmitter = require('events').EventEmitter;
 
 module.exports = class FileWatcher extends EventEmitter {
   constructor(config) {
     super();
 
-    this.fileWatcher = fireworm('./', {
-      ignoreInitial: true,
-      skipDirEntryPatterns: []
-    });
-    let onFileChanged = this.onFileChanged.bind(this);
-    this.fileWatcher.on('change', onFileChanged);
-    this.fileWatcher.on('add', onFileChanged);
-    this.fileWatcher.on('remove', onFileChanged);
-    this.fileWatcher.on('emfile', this.onEMFILE.bind(this));
+    let globPatterns = [];
 
-    let watchFiles = config.get('watch_files');
-    this.fileWatcher.clear();
     let confFile = config.get('file');
-    if (confFile) {
-      this.fileWatcher.add(confFile);
-    }
+    addPatternToGlobList(globPatterns, confFile);
+
     if (config.isCwdMode()) {
-      this.fileWatcher.add('*.js');
-    }
-    if (watchFiles) {
-      this.fileWatcher.add(watchFiles);
+      addPatternToGlobList(globPatterns, '*.js');
     }
+
+    let watchFiles = config.get('watch_files');
+    addPatternToGlobList(globPatterns, watchFiles);
+
     let srcFiles = config.get('src_files') || '*.js';
-    this.fileWatcher.add(srcFiles);
+    addPatternToGlobList(globPatterns, srcFiles);
+
     let ignoreFiles = config.get('src_files_ignore');
-    if (ignoreFiles) {
-      this.fileWatcher.ignore(ignoreFiles);
-    }
+
+    let cwd = config.cwd();
+
+    this.fileWatcher = sane(cwd, {
+      glob: globPatterns,
+      ignored: ignoreFiles
+    });
+
+    let onFileChanged = this.onFileChanged.bind(this);
+    this.fileWatcher.on('change', onFileChanged);
+    this.fileWatcher.on('add', onFileChanged);
+    this.fileWatcher.on('delete', onFileChanged);
   }
 
   onFileChanged(filePath) {
     this.emit('fileChanged', filePath);
   }
 
-  onEMFILE() {
-    this.emit('EMFILE');
-  }
-
   add(file) {
-    this.fileWatcher.add(file);
+    this.fileWatcher.register(file);
   }
 };
+
+function addPatternToGlobList(list, globPattern) {
+  if (!globPattern) {
+    return;
+  }
+
+  if (Array.isArray(globPattern)) {
+    globPattern.forEach((globPattern) => list.push(globPattern));
+  } else {
+    list.push(globPattern);
+  }
+}