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|
| /**
| * Module dependencies.
| */
|
| var assert = require('assert');
|
| /**
| * Expose `thunkify()`.
| */
|
| module.exports = thunkify;
|
| /**
| * Wrap a regular callback `fn` as a thunk.
| *
| * @param {Function} fn
| * @return {Function}
| * @api public
| */
|
| function thunkify(fn){
| assert('function' == typeof fn, 'function required');
|
| return function(){
| var args = new Array(arguments.length);
| var ctx = this;
|
| for(var i = 0; i < args.length; ++i) {
| args[i] = arguments[i];
| }
|
| return function(done){
| var called;
|
| args.push(function(){
| if (called) return;
| called = true;
| done.apply(null, arguments);
| });
|
| try {
| fn.apply(ctx, args);
| } catch (err) {
| done(err);
| }
| }
| }
| };
|
|
