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/truncate_test.ts b/js/truncate_test.ts
index 2556dc76a..2bca68a38 100644
--- a/js/truncate_test.ts
+++ b/js/truncate_test.ts
@@ -1,16 +1,15 @@
 // Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
 import { testPerm, assertEqual } from "./test_util.ts";
-import * as deno from "deno";
 
 function readDataSync(name: string): string {
-  const data = deno.readFileSync(name);
+  const data = Deno.readFileSync(name);
   const decoder = new TextDecoder("utf-8");
   const text = decoder.decode(data);
   return text;
 }
 
 async function readData(name: string): Promise<string> {
-  const data = await deno.readFile(name);
+  const data = await Deno.readFile(name);
   const decoder = new TextDecoder("utf-8");
   const text = decoder.decode(data);
   return text;
@@ -19,55 +18,55 @@ async function readData(name: string): Promise<string> {
 testPerm({ read: true, write: true }, function truncateSyncSuccess() {
   const enc = new TextEncoder();
   const d = enc.encode("Hello");
-  const filename = deno.makeTempDirSync() + "/test_truncateSync.txt";
-  deno.writeFileSync(filename, d);
-  deno.truncateSync(filename, 20);
+  const filename = Deno.makeTempDirSync() + "/test_truncateSync.txt";
+  Deno.writeFileSync(filename, d);
+  Deno.truncateSync(filename, 20);
   let data = readDataSync(filename);
   assertEqual(data.length, 20);
-  deno.truncateSync(filename, 5);
+  Deno.truncateSync(filename, 5);
   data = readDataSync(filename);
   assertEqual(data.length, 5);
-  deno.truncateSync(filename, -5);
+  Deno.truncateSync(filename, -5);
   data = readDataSync(filename);
   assertEqual(data.length, 0);
-  deno.removeSync(filename);
+  Deno.removeSync(filename);
 });
 
 testPerm({ read: true, write: true }, async function truncateSuccess() {
   const enc = new TextEncoder();
   const d = enc.encode("Hello");
-  const filename = deno.makeTempDirSync() + "/test_truncate.txt";
-  await deno.writeFile(filename, d);
-  await deno.truncate(filename, 20);
+  const filename = Deno.makeTempDirSync() + "/test_truncate.txt";
+  await Deno.writeFile(filename, d);
+  await Deno.truncate(filename, 20);
   let data = await readData(filename);
   assertEqual(data.length, 20);
-  await deno.truncate(filename, 5);
+  await Deno.truncate(filename, 5);
   data = await readData(filename);
   assertEqual(data.length, 5);
-  await deno.truncate(filename, -5);
+  await Deno.truncate(filename, -5);
   data = await readData(filename);
   assertEqual(data.length, 0);
-  await deno.remove(filename);
+  await Deno.remove(filename);
 });
 
 testPerm({ write: false }, function truncateSyncPerm() {
   let err;
   try {
-    deno.mkdirSync("/test_truncateSyncPermission.txt");
+    Deno.mkdirSync("/test_truncateSyncPermission.txt");
   } catch (e) {
     err = e;
   }
-  assertEqual(err.kind, deno.ErrorKind.PermissionDenied);
+  assertEqual(err.kind, Deno.ErrorKind.PermissionDenied);
   assertEqual(err.name, "PermissionDenied");
 });
 
 testPerm({ write: false }, async function truncatePerm() {
   let err;
   try {
-    await deno.mkdir("/test_truncatePermission.txt");
+    await Deno.mkdir("/test_truncatePermission.txt");
   } catch (e) {
     err = e;
   }
-  assertEqual(err.kind, deno.ErrorKind.PermissionDenied);
+  assertEqual(err.kind, Deno.ErrorKind.PermissionDenied);
   assertEqual(err.name, "PermissionDenied");
 });