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, 33 insertions, 34 deletions

diff --git a/js/files_test.ts b/js/files_test.ts
index a4d8a064a..6698f85c3 100644
--- a/js/files_test.ts
+++ b/js/files_test.ts
@@ -1,29 +1,28 @@
 // Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
-import * as deno from "deno";
 import { test, testPerm, assert, assertEqual } from "./test_util.ts";
 
 test(function filesStdioFileDescriptors() {
-  assertEqual(deno.stdin.rid, 0);
-  assertEqual(deno.stdout.rid, 1);
-  assertEqual(deno.stderr.rid, 2);
+  assertEqual(Deno.stdin.rid, 0);
+  assertEqual(Deno.stdout.rid, 1);
+  assertEqual(Deno.stderr.rid, 2);
 });
 
 testPerm({ read: true }, async function filesCopyToStdout() {
   const filename = "package.json";
-  const file = await deno.open(filename);
+  const file = await Deno.open(filename);
   assert(file.rid > 2);
-  const bytesWritten = await deno.copy(deno.stdout, file);
-  const fileSize = deno.statSync(filename).len;
+  const bytesWritten = await Deno.copy(Deno.stdout, file);
+  const fileSize = Deno.statSync(filename).len;
   assertEqual(bytesWritten, fileSize);
   console.log("bytes written", bytesWritten);
 });
 
 testPerm({ read: true }, async function filesToAsyncIterator() {
   const filename = "tests/hello.txt";
-  const file = await deno.open(filename);
+  const file = await Deno.open(filename);
 
   let totalSize = 0;
-  for await (const buf of deno.toAsyncIterator(file)) {
+  for await (const buf of Deno.toAsyncIterator(file)) {
     totalSize += buf.byteLength;
   }
 
@@ -32,16 +31,16 @@ testPerm({ read: true }, async function filesToAsyncIterator() {
 
 testPerm({ write: false }, async function writePermFailure() {
   const filename = "tests/hello.txt";
-  const writeModes: deno.OpenMode[] = ["w", "a", "x"];
+  const writeModes: Deno.OpenMode[] = ["w", "a", "x"];
   for (const mode of writeModes) {
     let err;
     try {
-      await deno.open(filename, mode);
+      await Deno.open(filename, mode);
     } catch (e) {
       err = e;
     }
     assert(!!err);
-    assertEqual(err.kind, deno.ErrorKind.PermissionDenied);
+    assertEqual(err.kind, Deno.ErrorKind.PermissionDenied);
     assertEqual(err.name, "PermissionDenied");
   }
 });
@@ -49,10 +48,10 @@ testPerm({ write: false }, async function writePermFailure() {
 testPerm({ read: false }, async function readPermFailure() {
   let caughtError = false;
   try {
-    await deno.open("package.json", "r");
+    await Deno.open("package.json", "r");
   } catch (e) {
     caughtError = true;
-    assertEqual(e.kind, deno.ErrorKind.PermissionDenied);
+    assertEqual(e.kind, Deno.ErrorKind.PermissionDenied);
     assertEqual(e.name, "PermissionDenied");
   }
   assert(caughtError);
@@ -60,52 +59,52 @@ testPerm({ read: false }, async function readPermFailure() {
 
 testPerm({ write: false, read: false }, async function readWritePermFailure() {
   const filename = "tests/hello.txt";
-  const writeModes: deno.OpenMode[] = ["r+", "w+", "a+", "x+"];
+  const writeModes: Deno.OpenMode[] = ["r+", "w+", "a+", "x+"];
   for (const mode of writeModes) {
     let err;
     try {
-      await deno.open(filename, mode);
+      await Deno.open(filename, mode);
     } catch (e) {
       err = e;
     }
     assert(!!err);
-    assertEqual(err.kind, deno.ErrorKind.PermissionDenied);
+    assertEqual(err.kind, Deno.ErrorKind.PermissionDenied);
     assertEqual(err.name, "PermissionDenied");
   }
 });
 
 testPerm({ read: true, write: true }, async function createFile() {
-  const tempDir = await deno.makeTempDir();
+  const tempDir = await Deno.makeTempDir();
   const filename = tempDir + "/test.txt";
-  const f = await deno.open(filename, "w");
-  let fileInfo = deno.statSync(filename);
+  const f = await Deno.open(filename, "w");
+  let fileInfo = Deno.statSync(filename);
   assert(fileInfo.isFile());
   assert(fileInfo.len === 0);
   const enc = new TextEncoder();
   const data = enc.encode("Hello");
   await f.write(data);
-  fileInfo = deno.statSync(filename);
+  fileInfo = Deno.statSync(filename);
   assert(fileInfo.len === 5);
   f.close();
 
   // TODO: test different modes
-  await deno.remove(tempDir, { recursive: true });
+  await Deno.remove(tempDir, { recursive: true });
 });
 
 testPerm({ read: true, write: true }, async function openModeWrite() {
-  const tempDir = deno.makeTempDirSync();
+  const tempDir = Deno.makeTempDirSync();
   const encoder = new TextEncoder();
   const filename = tempDir + "hello.txt";
   const data = encoder.encode("Hello world!\n");
 
-  let file = await deno.open(filename, "w");
+  let file = await Deno.open(filename, "w");
   // assert file was created
-  let fileInfo = deno.statSync(filename);
+  let fileInfo = Deno.statSync(filename);
   assert(fileInfo.isFile());
   assertEqual(fileInfo.len, 0);
   // write some data
   await file.write(data);
-  fileInfo = deno.statSync(filename);
+  fileInfo = Deno.statSync(filename);
   assertEqual(fileInfo.len, 13);
   // assert we can't read from file
   let thrown = false;
@@ -119,27 +118,27 @@ testPerm({ read: true, write: true }, async function openModeWrite() {
   }
   file.close();
   // assert that existing file is truncated on open
-  file = await deno.open(filename, "w");
+  file = await Deno.open(filename, "w");
   file.close();
-  const fileSize = deno.statSync(filename).len;
+  const fileSize = Deno.statSync(filename).len;
   assertEqual(fileSize, 0);
-  await deno.remove(tempDir, { recursive: true });
+  await Deno.remove(tempDir, { recursive: true });
 });
 
 testPerm({ read: true, write: true }, async function openModeWriteRead() {
-  const tempDir = deno.makeTempDirSync();
+  const tempDir = Deno.makeTempDirSync();
   const encoder = new TextEncoder();
   const filename = tempDir + "hello.txt";
   const data = encoder.encode("Hello world!\n");
 
-  const file = await deno.open(filename, "w+");
+  const file = await Deno.open(filename, "w+");
   // assert file was created
-  let fileInfo = deno.statSync(filename);
+  let fileInfo = Deno.statSync(filename);
   assert(fileInfo.isFile());
   assertEqual(fileInfo.len, 0);
   // write some data
   await file.write(data);
-  fileInfo = deno.statSync(filename);
+  fileInfo = Deno.statSync(filename);
   assertEqual(fileInfo.len, 13);
 
   // TODO: this test is not working, I expect because
@@ -152,5 +151,5 @@ testPerm({ read: true, write: true }, async function openModeWriteRead() {
   // assertEqual(result.nread, 13);
   // file.close();
 
-  await deno.remove(tempDir, { recursive: true });
+  await Deno.remove(tempDir, { recursive: true });
 });