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repl.coffee

#

A very simple Read-Eval-Print-Loop. Compiles one line at a time to JavaScript and evaluates it. Good for simple tests, or poking around the Node.js API. Using it looks like this:

coffee> puts "$num bottles of beer" for num in [99..1]

             		           
                               
                            
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Require the coffee-script module to get access to the compiler.
             		                            
CoffeeScript: require './coffee-script'
helpers:      require('./helpers').helpers
             		           
                               
                            
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Our prompt.
             		                            
prompt: 'coffee> '
             		           
                               
                            
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Quick alias for quitting the REPL.
             		                            
helpers.extend global, {
  quit: -> process.exit(0)
}
             		           
                               
                            
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The main REPL function. run is called every time a line of code is entered.
Attempt to evaluate the command. If there's an exception, print it out instead
of exiting.
             		                            
run: (buffer) ->
  try
    val: CoffeeScript.run buffer.toString(), {no_wrap: true, globals: true, source: 'repl'}
    p val if val isnt undefined
  catch err
    puts err.stack or err.toString()
  print prompt
             		           
                               
                            
                 #               
               
Start up the REPL by opening stdin and listening for input.
             		                            
stdin: process.openStdin()
stdin.addListener 'data', run
print prompt