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, 26 insertions, 27 deletions

diff --git a/js/copy_file_test.ts b/js/copy_file_test.ts
index 3bd1f7229..5969cd22d 100644
--- a/js/copy_file_test.ts
+++ b/js/copy_file_test.ts
@@ -1,9 +1,8 @@
 // Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
 import { testPerm, assert, assertEqual } from "./test_util.ts";
-import * as deno from "deno";
 
 function readFileString(filename: string): string {
-  const dataRead = deno.readFileSync(filename);
+  const dataRead = Deno.readFileSync(filename);
   const dec = new TextDecoder("utf-8");
   return dec.decode(dataRead);
 }
@@ -11,21 +10,21 @@ function readFileString(filename: string): string {
 function writeFileString(filename: string, s: string) {
   const enc = new TextEncoder();
   const data = enc.encode(s);
-  deno.writeFileSync(filename, data, { perm: 0o666 });
+  Deno.writeFileSync(filename, data, { perm: 0o666 });
 }
 
 function assertSameContent(filename1: string, filename2: string) {
-  const data1 = deno.readFileSync(filename1);
-  const data2 = deno.readFileSync(filename2);
+  const data1 = Deno.readFileSync(filename1);
+  const data2 = Deno.readFileSync(filename2);
   assertEqual(data1, data2);
 }
 
 testPerm({ read: true, write: true }, function copyFileSyncSuccess() {
-  const tempDir = deno.makeTempDirSync();
+  const tempDir = Deno.makeTempDirSync();
   const fromFilename = tempDir + "/from.txt";
   const toFilename = tempDir + "/to.txt";
   writeFileString(fromFilename, "Hello world!");
-  deno.copyFileSync(fromFilename, toFilename);
+  Deno.copyFileSync(fromFilename, toFilename);
   // No change to original file
   assertEqual(readFileString(fromFilename), "Hello world!");
   // Original == Dest
@@ -33,28 +32,28 @@ testPerm({ read: true, write: true }, function copyFileSyncSuccess() {
 });
 
 testPerm({ write: true, read: true }, function copyFileSyncFailure() {
-  const tempDir = deno.makeTempDirSync();
+  const tempDir = Deno.makeTempDirSync();
   const fromFilename = tempDir + "/from.txt";
   const toFilename = tempDir + "/to.txt";
   // We skip initial writing here, from.txt does not exist
   let err;
   try {
-    deno.copyFileSync(fromFilename, toFilename);
+    Deno.copyFileSync(fromFilename, toFilename);
   } catch (e) {
     err = e;
   }
   assert(!!err);
-  assertEqual(err.kind, deno.ErrorKind.NotFound);
+  assertEqual(err.kind, Deno.ErrorKind.NotFound);
   assertEqual(err.name, "NotFound");
 });
 
 testPerm({ write: true, read: false }, function copyFileSyncPerm1() {
   let caughtError = false;
   try {
-    deno.copyFileSync("/from.txt", "/to.txt");
+    Deno.copyFileSync("/from.txt", "/to.txt");
   } catch (e) {
     caughtError = true;
-    assertEqual(e.kind, deno.ErrorKind.PermissionDenied);
+    assertEqual(e.kind, Deno.ErrorKind.PermissionDenied);
     assertEqual(e.name, "PermissionDenied");
   }
   assert(caughtError);
@@ -63,23 +62,23 @@ testPerm({ write: true, read: false }, function copyFileSyncPerm1() {
 testPerm({ write: false, read: true }, function copyFileSyncPerm2() {
   let caughtError = false;
   try {
-    deno.copyFileSync("/from.txt", "/to.txt");
+    Deno.copyFileSync("/from.txt", "/to.txt");
   } catch (e) {
     caughtError = true;
-    assertEqual(e.kind, deno.ErrorKind.PermissionDenied);
+    assertEqual(e.kind, Deno.ErrorKind.PermissionDenied);
     assertEqual(e.name, "PermissionDenied");
   }
   assert(caughtError);
 });
 
 testPerm({ read: true, write: true }, function copyFileSyncOverwrite() {
-  const tempDir = deno.makeTempDirSync();
+  const tempDir = Deno.makeTempDirSync();
   const fromFilename = tempDir + "/from.txt";
   const toFilename = tempDir + "/to.txt";
   writeFileString(fromFilename, "Hello world!");
   // Make Dest exist and have different content
   writeFileString(toFilename, "Goodbye!");
-  deno.copyFileSync(fromFilename, toFilename);
+  Deno.copyFileSync(fromFilename, toFilename);
   // No change to original file
   assertEqual(readFileString(fromFilename), "Hello world!");
   // Original == Dest
@@ -87,11 +86,11 @@ testPerm({ read: true, write: true }, function copyFileSyncOverwrite() {
 });
 
 testPerm({ read: true, write: true }, async function copyFileSuccess() {
-  const tempDir = deno.makeTempDirSync();
+  const tempDir = Deno.makeTempDirSync();
   const fromFilename = tempDir + "/from.txt";
   const toFilename = tempDir + "/to.txt";
   writeFileString(fromFilename, "Hello world!");
-  await deno.copyFile(fromFilename, toFilename);
+  await Deno.copyFile(fromFilename, toFilename);
   // No change to original file
   assertEqual(readFileString(fromFilename), "Hello world!");
   // Original == Dest
@@ -99,29 +98,29 @@ testPerm({ read: true, write: true }, async function copyFileSuccess() {
 });
 
 testPerm({ read: true, write: true }, async function copyFileFailure() {
-  const tempDir = deno.makeTempDirSync();
+  const tempDir = Deno.makeTempDirSync();
   const fromFilename = tempDir + "/from.txt";
   const toFilename = tempDir + "/to.txt";
   // We skip initial writing here, from.txt does not exist
   let err;
   try {
-    await deno.copyFile(fromFilename, toFilename);
+    await Deno.copyFile(fromFilename, toFilename);
   } catch (e) {
     err = e;
   }
   assert(!!err);
-  assertEqual(err.kind, deno.ErrorKind.NotFound);
+  assertEqual(err.kind, Deno.ErrorKind.NotFound);
   assertEqual(err.name, "NotFound");
 });
 
 testPerm({ read: true, write: true }, async function copyFileOverwrite() {
-  const tempDir = deno.makeTempDirSync();
+  const tempDir = Deno.makeTempDirSync();
   const fromFilename = tempDir + "/from.txt";
   const toFilename = tempDir + "/to.txt";
   writeFileString(fromFilename, "Hello world!");
   // Make Dest exist and have different content
   writeFileString(toFilename, "Goodbye!");
-  await deno.copyFile(fromFilename, toFilename);
+  await Deno.copyFile(fromFilename, toFilename);
   // No change to original file
   assertEqual(readFileString(fromFilename), "Hello world!");
   // Original == Dest
@@ -131,10 +130,10 @@ testPerm({ read: true, write: true }, async function copyFileOverwrite() {
 testPerm({ read: false, write: true }, async function copyFilePerm1() {
   let caughtError = false;
   try {
-    await deno.copyFile("/from.txt", "/to.txt");
+    await Deno.copyFile("/from.txt", "/to.txt");
   } catch (e) {
     caughtError = true;
-    assertEqual(e.kind, deno.ErrorKind.PermissionDenied);
+    assertEqual(e.kind, Deno.ErrorKind.PermissionDenied);
     assertEqual(e.name, "PermissionDenied");
   }
   assert(caughtError);
@@ -143,10 +142,10 @@ testPerm({ read: false, write: true }, async function copyFilePerm1() {
 testPerm({ read: true, write: false }, async function copyFilePerm2() {
   let caughtError = false;
   try {
-    await deno.copyFile("/from.txt", "/to.txt");
+    await Deno.copyFile("/from.txt", "/to.txt");
   } catch (e) {
     caughtError = true;
-    assertEqual(e.kind, deno.ErrorKind.PermissionDenied);
+    assertEqual(e.kind, Deno.ErrorKind.PermissionDenied);
     assertEqual(e.name, "PermissionDenied");
   }
   assert(caughtError);