apply patch from original coffee-script: ignore hidden files/dir

jashkenas/coffee-script: fixes #1537: ignore hidden files/directories in watched directories

Cakefile

@@ -55,6 +55,8 @@ task 'install', 'install CoffeeScript into /usr/local (or --prefix)', (options)
   console.log   "Installing CoffeeScript to #{lib}"
   console.log   "Linking to #{node}"
   console.log   "Linking 'coffee' to #{bin}/xcoffee"
+  console.log   "Linking 'cake' to #{bin}/xcake"
+  console.log   "Linking 'cson' to #{bin}/xcson"
   exec([
     "mkdir -p #{lib} #{bin}"
     "cp -rf bin lib LICENSE README package.json src #{lib}"

src/command.coffee

@@ -22,6 +22,8 @@ helpers.extend CoffeeScript, new EventEmitter
 printLine = (line) -> process.stdout.write line + '\n'
 printWarn = (line) -> process.stderr.write line + '\n'
 
+hidden = (file) -> /^\.|~$/.test file
+
 # The help banner that is printed when `coffee` is called without arguments.
 BANNER = '''
   Usage: iced [options] path/to/script.coffee
@@ -105,11 +107,11 @@ compilePath = (source, topLevel, base) ->
       fs.readdir source, (err, files) ->
         throw err if err and err.code isnt 'ENOENT'
         return if err?.code is 'ENOENT'
-        files = files.map (file) -> path.join source, file
         index = sources.indexOf source
-        sources[index..index] = files
+        sources[index..index] = (path.join source, file for file in files)
         sourceCode[index..index] = files.map -> null
-        compilePath file, no, base for file in files
+        for file in files when not hidden file
+          compilePath (path.join source, file), no, base
     else if topLevel or path.extname(source) is '.coffee'
       watch source, base if opts.watch
       fs.readFile source, (err, code) ->
@@ -238,8 +240,8 @@ watchDir = (source, base) ->
             throw err unless err.code is 'ENOENT'
             watcher.close()
             return unwatchDir source, base
-          files = files.map (file) -> path.join source, file
-          for file in files when not notSources[file]
+          for file in files when not hidden(file) and not notSources[file]
+            file = path.join source, file
             continue if sources.some (s) -> s.indexOf(file) >= 0
             sources.push file
             sourceCode.push null