50 lines
1.6 KiB
JavaScript
50 lines
1.6 KiB
JavaScript
(function(){
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var CoffeeScript, helpers, readline, repl, run, stdio;
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// A very simple Read-Eval-Print-Loop. Compiles one line at a time to JavaScript
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// and evaluates it. Good for simple tests, or poking around the **Node.js** API.
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// Using it looks like this:
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// 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.
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CoffeeScript = require('./coffee-script');
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helpers = require('./helpers').helpers;
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readline = require('readline');
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// Start by opening up **stdio**.
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stdio = process.openStdin();
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// Quick alias for quitting the REPL.
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helpers.extend(global, {
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quit: function() {
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return process.exit(0);
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}
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});
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// The main REPL function. **run** is called every time a line of code is entered.
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// Attempt to evaluate the command. If there's an exception, print it out instead
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// of exiting.
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run = function(buffer) {
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var val;
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try {
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val = CoffeeScript.run(buffer.toString(), {
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no_wrap: true,
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globals: true,
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source: 'repl'
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});
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if (val !== undefined) {
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puts(inspect(val));
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}
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} catch (err) {
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puts(err.stack || err.toString());
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}
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return repl.prompt();
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};
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// Create the REPL by listening to **stdin**.
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repl = readline.createInterface(stdio);
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repl.setPrompt('coffee> ');
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stdio.addListener('data', function(buffer) {
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return repl.write(buffer);
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});
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repl.addListener('close', function() {
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return stdio.destroy();
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});
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repl.addListener('line', run);
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repl.prompt();
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})();
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