/**
 * This script will ensure that users are using a supported version of node
 * for the project.
 *
 * NOTE: Ensure this script uses ES5 only as the user may be running an old
 * version of Node, which this script wants to test against.
 */
/* eslint-disable */
var exec = require('child_process').exec;
var existsSync = require('fs').existsSync;
var pathResolve = require('path').resolve;
if (existsSync(pathResolve(__dirname, '../../node_modules'))) {
    // An install has already occurred.
    console.log('Already Installed');
}
// Inspired by "create-react-app". Thanks @gaearon :)
function checkNodeVersion() {
    var semver = require('semver');
    if (!semver.satisfies(process.version, packageJson.engines.node)) {
        console.error('You are currently running Node %s but %s requires %s. Please use a supported version of Node.\n', process.version, packageJson.name, packageJson.engines.node);
        process.exit(1);
    }
}
var packageJson = require('../../../package.json');
if (!packageJson.engines ||
    !packageJson.engines.node ||
    !packageJson.devDependencies ||
    !packageJson.devDependencies.semver) {
    // The package has already been customised. Ignore this script.
    console.log('Package already customized');
}
exec('npm install semver@' + packageJson.devDependencies.semver, function installSemverCb(err, stdout, stderr) {
    if (err)
        throw err;
    checkNodeVersion();
});
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