index.js

'use strict';

// const shellSync = require('./shellSync');
const execSync = require('child_process').execSync;
const execFile = require('child_process').execFile;
const PHANTOM_PATH = '/tmp/phantom';
const phantomjsPrebuiltVersion = require('./package.json').phantomjsPrebuiltVersion;
const util = require('util');

const pack = exports = module.exports = {};

pack.state = [];

pack.packPack = (message) => {
    pack.state += ' \n' + message;
    console.log('pack:' + message)
};

pack.isAWSHosted = () => {
    const functionName = process.env.AWS_LAMBDA_FUNCTION_NAME || undefined;

    return functionName !== undefined;
};

const shellSync = (command, cwd) => {
    console.log('shellSync:', command);

    const options = {};
    const env = process.env;
    env.npm_config_cache ='/tmp/.npm';
    options.cwd = cwd;
    options.env = env;

    return execSync(command, options).toString();
};

pack.installPhantom = () => {
    pack.packPack("Install Phantom Called");
    if(pack.isAWSHosted()) {
        pack.packPack("Install Phantom Called: IS HOSTED");
        const mkdirOut = shellSync(`mkdir -p ${PHANTOM_PATH}`);
        pack.packPack(`mkdirOut: ${mkdirOut}`);

        const mkdir2Out = shellSync(`mkdir -p /tmp/.npm`);
        pack.packPack(`mkdir2Out: ${mkdir2Out}`);

        try {
            const npmInstall = shellSync(`npm install phantomjs-prebuilt@${phantomjsPrebuiltVersion}`, PHANTOM_PATH);
            pack.packPack(`npmInstall: [[ ${npmInstall} ]] `);
        }
        catch(e) {
            pack.packPack(`npmInstall error: ${e}`);
        }


        // const lsOut = shellSync('ls -a', '/tmp/phantom/node_modules/phantomjs-prebuilt/bin');
        // pack.packPack(`lsOut: ${lsOut}`);
    }
    else {
        console.log('Its not hosted at AWS');
    }
};

pack.path = getPhantomPath();

pack.exec = function(args, onComplete) {

    console.log('exec phantom: ', args);
    
    if (!util.isArray(args)) {
        args = [ args ];
    }

    const phantomPath = getPhantomPath();
    return execFile(phantomPath, args, onComplete);

};

// This is pretty lame because it requires phantomjs be in the path, but it keeps things light and simple for now
function getPhantomPath() {

    if(pack.isAWSHosted()) {
        return '/tmp/phantom/node_modules/phantomjs-prebuilt/bin/phantomjs';
    }

    return 'phantomjs';

}

// Install By default
pack.installPhantom();