Add back typescript version number and add Deno.version object.

BUILD.gn

@@ -109,6 +109,7 @@ ts_sources = [
   "js/workers.ts",
   "js/write_file.ts",
   "js/performance.ts",
+  "js/version.ts",
   "tsconfig.json",
 
   # Listing package.json and yarn.lock as sources ensures the bundle is rebuilt

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

@@ -9,6 +9,7 @@ import * as os from "./os";
 import { libdeno } from "./libdeno";
 import { args } from "./deno";
 import { replLoop } from "./repl";
+import { setVersions } from "./version";
 
 // builtin modules
 import * as deno from "./deno";
@@ -24,12 +25,13 @@ export default function denoMain() {
   libdeno.builtinModules["deno"] = deno;
   Object.freeze(libdeno.builtinModules);
 
+  setVersions(startResMsg.denoVersion()!, startResMsg.v8Version()!);
+
   // handle `--version`
   if (startResMsg.versionFlag()) {
-    console.log("deno:", startResMsg.denoVersion());
-    console.log("v8:", startResMsg.v8Version());
-    // TODO figure out a way to restore functionality
-    // console.log("typescript:", version);
+    console.log("deno:", deno.version.deno);
+    console.log("v8:", deno.version.v8);
+    console.log("typescript:", deno.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 +1,23 @@
+// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
+interface Version {
+  deno: string;
+  v8: string;
+  typescript: string;
+}
+
+export const version: Version = {
+  deno: "",
+  v8: "",
+  typescript: "TS_VERSION" // This string will be replaced by rollup
+};
+
+/**
+ * Sets the deno and v8 versions and freezes the version object.
+ * @internal
+ */
+export function setVersions(denoVersion: string, v8Version: string): void {
+  version.deno = denoVersion;
+  version.v8 = v8Version;
+
+  Object.freeze(version);
+}

js/version_test.ts

@@ -0,0 +1,8 @@
+import { test, assert } from "./test_util.ts";
+
+test(function version() {
+  const pattern = /^\d+\.\d+\.\d+$/;
+  assert(pattern.test(Deno.version.deno));
+  assert(pattern.test(Deno.version.v8));
+  assert(pattern.test(Deno.version.typescript));
+});

package.json

@@ -15,6 +15,7 @@
     "rollup-plugin-commonjs": "^9.1.3",
     "rollup-plugin-node-globals": "^1.2.1",
     "rollup-plugin-node-resolve": "^3.3.0",
+    "rollup-plugin-replace": "^2.1.0",
     "rollup-plugin-string": "^2.0.2",
     "rollup-plugin-typescript2": "^0.16.1",
     "rollup-pluginutils": "^2.3.0",

rollup.config.js

@@ -9,6 +9,7 @@ import globals from "rollup-plugin-node-globals";
 import nodeResolve from "rollup-plugin-node-resolve";
 import typescriptPlugin from "rollup-plugin-typescript2";
 import { createFilter } from "rollup-pluginutils";
+import replace from "rollup-plugin-replace";
 import typescript from "typescript";
 import MagicString from "magic-string";
 
@@ -225,6 +226,11 @@ export default function makeConfig(commandOptions) {
         include: [platformPath]
       }),
 
+      // replace strings
+      replace({
+        TS_VERSION: typescript.version
+      }),
+
       // would prefer to use `rollup-plugin-virtual` to inject the empty module, but there
       // is an issue with `rollup-plugin-commonjs` which causes errors when using the
       // virtual plugin (see: rollup/rollup-plugin-commonjs#315), this means we have to use