verify-node-version.ts

// This function must be separate to avoid dependencies on C++ modules - it must execute precisely when other functions cannot

// Use only ES5 code here - pure JavaScript can be executed with any Node.js version (even 0.10, 0.12).
/* tslint:disable:no-var-keyword no-var-requires prefer-const*/
var os = require("os");
var semver = require("semver");
var util = require("util");

// These versions cannot be used with CLI due to bugs in the node itself.
// We are absolutely sure we cannot work with them, so inform the user if he is trying to use any of them and exit the process.
var versionsCausingFailure = ["0.10.34", "4.0.0", "4.2.0", "5.0.0"];
var minimumRequiredVersion = "6.0.0";

interface INodeVersionOpts {
	supportedVersionsRange: string;
	cliName: string;
	deprecatedVersions?: string[];
	nodeVer: string;
}

function getNodeVersionOpts(): INodeVersionOpts {
	var supportedVersionsRange = require("../../package.json").engines.node;
	var cliName = "NativeScript";
	var deprecatedVersions = ["^6.0.0", "^7.0.0"];
	var nodeVer = process.version.substr(1);
	return {
		supportedVersionsRange: supportedVersionsRange,
		cliName: cliName,
		nodeVer: nodeVer,
		deprecatedVersions: deprecatedVersions
	};
}

export function verifyNodeVersion(): void {
	var verificationOpts = getNodeVersionOpts();
	var cliName = verificationOpts.cliName;
	var supportedVersionsRange = verificationOpts.supportedVersionsRange;
	var nodeVer = verificationOpts.nodeVer;

	// The colors module should not be assigned to variable because the lint task will fail for not used variable.
	require("colors");

	if (versionsCausingFailure.indexOf(nodeVer) !== -1 || !semver.valid(nodeVer) || semver.lt(nodeVer, minimumRequiredVersion)) {
		console.error(util.format("%sNode.js '%s' is not supported. To be able to work with %s CLI, install any Node.js version in the following range: %s.%s",
			os.EOL, nodeVer, cliName, supportedVersionsRange, os.EOL).red.bold);
		process.exit(1);
	}

	var nodeWarning = getNodeWarning();
	if (nodeWarning && nodeWarning.message) {
		console.warn((`${os.EOL}${nodeWarning.message}${os.EOL}`).yellow.bold);
	}
}

export function getNodeWarning(): ISystemWarning {
	var verificationOpts = getNodeVersionOpts();
	var cliName = verificationOpts.cliName;
	var supportedVersionsRange = verificationOpts.supportedVersionsRange;
	var deprecatedVersions = verificationOpts.deprecatedVersions;
	var nodeVer = verificationOpts.nodeVer;

	var warningMessage = "";
	if (deprecatedVersions) {
		deprecatedVersions.forEach(function (version) {
			if (semver.satisfies(nodeVer, version)) {
				warningMessage = "Support for Node.js " + version + " is deprecated and will be removed in one of the next releases of " + cliName +
					". Please, upgrade to the latest Node.js LTS version. ";
				return warningMessage;
			}
		});
	}

	if (!warningMessage) {
		var checkSatisfied = semver.satisfies(nodeVer, supportedVersionsRange);
		if (!checkSatisfied) {
			warningMessage = "Support for Node.js " + nodeVer + " is not verified. " + cliName + " CLI might not install or run properly.";
		}
	}

	return {
		message: warningMessage,
		severity: SystemWarningsSeverity.medium
	};
}
/* tslint:enable */