Add Deno global namespace (#1748)

Resolves #1705

This PR adds the Deno APIs as a global namespace named `Deno`. For backwards
compatibility, the ability to `import * from "deno"` is preserved. I have tried
to convert every test and internal code the references the module to use the
namespace instead, but because I didn't break compatibility I am not sure.

On the REPL, `deno` no longer exists, replaced only with `Deno` to align with
the regular runtime.

The runtime type library includes both the namespace and module. This means it
duplicates the whole type information. When we remove the functionality from the
runtime, it will be a one line change to the library generator to remove the
module definition from the type library.

I marked a `TODO` in a couple places where to remove the `"deno"` module, but
there are additional places I know I didn't mark.

1 files changed, 18 insertions, 19 deletions

diff --git a/js/dir_test.ts b/js/dir_test.ts
index ae0415e1b..8908f3da8 100644
--- a/js/dir_test.ts
+++ b/js/dir_test.ts
@@ -1,52 +1,51 @@
 // Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
 import { test, testPerm, assert, assertEqual } from "./test_util.ts";
-import * as deno from "deno";
 
 test(function dirCwdNotNull() {
-  assert(deno.cwd() != null);
+  assert(Deno.cwd() != null);
 });
 
 testPerm({ write: true }, function dirCwdChdirSuccess() {
-  const initialdir = deno.cwd();
-  const path = deno.makeTempDirSync();
-  deno.chdir(path);
-  const current = deno.cwd();
-  if (deno.platform.os === "mac") {
+  const initialdir = Deno.cwd();
+  const path = Deno.makeTempDirSync();
+  Deno.chdir(path);
+  const current = Deno.cwd();
+  if (Deno.platform.os === "mac") {
     assertEqual(current, "/private" + path);
   } else {
     assertEqual(current, path);
   }
-  deno.chdir(initialdir);
+  Deno.chdir(initialdir);
 });
 
 testPerm({ write: true }, function dirCwdError() {
   // excluding windows since it throws resource busy, while removeSync
-  if (["linux", "mac"].includes(deno.platform.os)) {
-    const initialdir = deno.cwd();
-    const path = deno.makeTempDirSync();
-    deno.chdir(path);
-    deno.removeSync(path);
+  if (["linux", "mac"].includes(Deno.platform.os)) {
+    const initialdir = Deno.cwd();
+    const path = Deno.makeTempDirSync();
+    Deno.chdir(path);
+    Deno.removeSync(path);
     try {
-      deno.cwd();
+      Deno.cwd();
       throw Error("current directory removed, should throw error");
     } catch (err) {
-      if (err instanceof deno.DenoError) {
+      if (err instanceof Deno.DenoError) {
         console.log(err.name === "NotFound");
       } else {
         throw Error("raised different exception");
       }
     }
-    deno.chdir(initialdir);
+    Deno.chdir(initialdir);
   }
 });
 
 testPerm({ write: true }, function dirChdirError() {
-  const path = deno.makeTempDirSync() + "test";
+  const path = Deno.makeTempDirSync() + "test";
   try {
-    deno.chdir(path);
+    Deno.chdir(path);
     throw Error("directory not available, should throw error");
   } catch (err) {
-    if (err instanceof deno.DenoError) {
+    if (err instanceof Deno.DenoError) {
       console.log(err.name === "NotFound");
     } else {
       throw Error("raised different exception");