feat: add Deno.version

js/deno.ts

@@ -56,6 +56,7 @@ export { metrics, Metrics } from "./metrics";
 export { resources } from "./resources";
 export { run, RunOptions, Process, ProcessStatus } from "./process";
 export { inspect } from "./console";
+export { version } from "./version";
 export const args: string[] = [];
 
 // TODO Don't expose Console nor stringifyArgs.

js/main.ts

@@ -1,7 +1,6 @@
 // Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
 // tslint:disable-next-line:no-reference
 /// <reference path="./plugins.d.ts" />
-/// <reference path="./const.d.ts" />
 
 import "./globals";
 
@@ -10,6 +9,7 @@ import * as os from "./os";
 import { libdeno } from "./libdeno";
 import { args } from "./deno";
 import { replLoop } from "./repl";
+import { version } from "./version";
 
 // builtin modules
 import * as deno from "./deno";
@@ -25,11 +25,14 @@ export default function denoMain() {
   libdeno.builtinModules["deno"] = deno;
   Object.freeze(libdeno.builtinModules);
 
+  version.deno = startResMsg.denoVersion();
+  version.v8 = startResMsg.v8Version();
+
   // handle `--version`
   if (startResMsg.versionFlag()) {
-    console.log("deno:", startResMsg.denoVersion());
-    console.log("v8:", startResMsg.v8Version());
-    console.log("typescript:", TS_VERSION);
+    console.log("deno:", version.deno);
+    console.log("v8:", version.v8);
+    console.log("typescript:", version.typescript);
     os.exit(0);
   }
 

js/unit_tests.ts

@@ -44,6 +44,7 @@ import "./url_test.ts";
 import "./url_search_params_test.ts";
 import "./write_file_test.ts";
 import "./performance_test.ts";
+import "./version_test.ts";
 
 import "../website/app_test.js";
 

js/version.ts

@@ -0,0 +1,15 @@
+// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
+// tslint:disable-next-line:no-reference
+/// <reference path="./const.d.ts" />
+
+interface Version {
+  deno: string | null;
+  v8: string | null;
+  typescript: string;
+}
+
+export const version: Version = {
+  deno: null,
+  v8: null,
+  typescript: TS_VERSION
+};

js/version_test.ts

@@ -0,0 +1,7 @@
+import { test, assertEqual, assert } from "./test_util.ts";
+
+test(function version() {
+  assert(typeof Deno.version.deno === "string");
+  assert(typeof Deno.version.v8 === "string");
+  assert(typeof Deno.version.typescript === "string");
+});