Introduce a --disable-npm-install option

Allow for advanced uses that run `npm install` only once and want
to avoid rerunning it on every command.

Author: hdeshev

lib/declarations.ts

@@ -82,6 +82,7 @@ interface IOptions extends ICommonOptions {
 	frameworkPath: string;
 	frameworkVersion: string;
 	ignoreScripts: boolean;
+	disableNpmInstall: boolean;
 	ipa: string;
 	keyStoreAlias: string;
 	keyStoreAliasPassword: string;

lib/node-package-manager.ts

@@ -37,6 +37,9 @@ export class NodePackageManager implements INodePackageManager {
 	}
 
 	public install(packageName: string, pathToSave: string, config?: any): IFuture<any> {
+		if (this.$options.disableNpmInstall) {
+			return Future.fromResult();
+		}
 		if (this.$options.ignoreScripts) {
 			config = config || {};
 			config["ignore-scripts"] = true;

lib/options.ts

@@ -26,6 +26,7 @@ export class Options extends commonOptionsLibPath.OptionsBase {
 			keyStoreAlias: { type: OptionType.String },
 			keyStoreAliasPassword: { type: OptionType.String },
 			ignoreScripts: {type: OptionType.Boolean },
+			disableNpmInstall: {type: OptionType.Boolean },
 			tnsModulesVersion: { type: OptionType.String },
 			compileSdk: {type: OptionType.Number },
 			port: { type: OptionType.Number },