robojones/z1

const path = require('path')
const cpuCount = require('os').cpus().length
const verifyPorts = require('./verifyPorts')

function getPack(dir, opt, env) {
    // reload package.json
    const packPath = path.join(dir, 'package.json')
    delete require.cache[packPath]
    const originalPackage = require(packPath)
    const pack = Object.assign({}, originalPackage, opt)

    // name
    if (!pack.name) {
        throw new Error('name in package.json must be set')
    }

    if (opt.ports) {
        verifyPorts(opt, 'ports', 'options')
        pack.ports = opt.ports
    }

    verifyPorts(pack, 'ports')

    // set default value for ports
    pack.ports = pack.ports || []

    // apply dev*
    if (env.NODE_ENV === 'development') {
        // apply devPorts
        verifyPorts(pack, 'devPorts')
        pack.ports = pack.devPorts || pack.ports
        // apply devWorkers
        pack.workers = opt.workers || pack.devWorkers || originalPackage.workers
    }

    pack.workers = Math.abs(+pack.workers) || cpuCount

    return pack
}

module.exports = getPack