Watching and compiling coffee scripts

watcher.coffee

# Coffe Blender for your coffee scripts
# It watches coffee for changes and compiles
# ======
# coffee --no-wrap -c watcher.coffee # Compile it, onetime
#
# Now you can eiher supply the files from the command line:
# node watcher.js my_file.coffee
# or pass them through stdin:
# find . | grep coffee$| node watcher.js -
# git ls-files | grep coffee$| node watcher.js -

puts: require('sys').puts
exec: require('child_process').exec
watch: require('fs').watchFile

blend: (filename) ->
        exec "coffee --no-wrap -c $filename", (err, stderr, stdout) ->
                puts(if err then "! $stdout" else "= Blended $filename")

register: (file) ->
        puts "+ Registering $file"
        blend file
        watch file, (curr, prev) ->
                blend file

args: process.argv[2...process.argv.length]

if args[0] == '-'
        files: []
        stdin: process.openStdin()
        stdin.addListener 'data', (chunk) ->
                data: chunk.toString('ascii')
                files.push(file) for file in data.split('\n') when file isnt ''

        stdin.addListener 'end', ->
                register file for file in files
else
        files: args
        register file for file in files