A useful bit of code to be able to report PhantomJS errors to BugSnag

bugsnag_phantomjs.js

/* global require, phantom */
(function () {
    'use strict';
    var exec, system, env;
    exec = require('child_process').spawn;
    system = require('system');
    env = system.env.NODE_ENV || system.env.RACK_ENV || 'development';
    phantom.onError = function (message, trace) {
        // dont report for development
        if (env === 'development') {
            return;
        }
        var payload, stacktrace, stack;
        stacktrace = [];
        if (trace && trace.length) {
            trace.forEach(function (t) {
                stack = {
                    file: t.file || t.sourceURL,
                    lineNumber: t.line,
                    columnNumber: t.column,
                    method: t['function'],
                    inProject: true
                };
                stacktrace.push(stack);
            });
        }
        payload = {
            apiKey: 'c9d60ae4c7e70c4b6c4ebd3e8056d2b8',
            notifier: {
                name: "Bugsnag PhantomJS",
                version: "0.0.0",
                url: "https://gist.github.com/kylewelsby/8038762"
            },
            events: [{
                releaseStage: env,
                context: "src/node/crawler.js",
                groupingHash: message,
                exceptions: [{
                    errorClass: 'phantom.onError',
                    message: message,
                    stacktrace: stacktrace
                }]
            }]
        };
        try {
            exec('curl', [
                "-H",
                "Content-Type: application/json",
                "--data",
                JSON.stringify(payload),
                "https://notify.bugsnag.com"
            ]);
        } catch (err) {
            console.error('Could not report this to bugsnag');
            console.error(err);
        }
    };
}).call();