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, 54 insertions, 55 deletions

diff --git a/js/write_file_test.ts b/js/write_file_test.ts
index 39f191842..ba136bf5d 100644
--- a/js/write_file_test.ts
+++ b/js/write_file_test.ts
@@ -1,13 +1,12 @@
 // Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
 import { testPerm, assert, assertEqual } from "./test_util.ts";
-import * as deno from "deno";
 
 testPerm({ read: true, write: true }, function writeFileSyncSuccess() {
   const enc = new TextEncoder();
   const data = enc.encode("Hello");
-  const filename = deno.makeTempDirSync() + "/test.txt";
-  deno.writeFileSync(filename, data);
-  const dataRead = deno.readFileSync(filename);
+  const filename = Deno.makeTempDirSync() + "/test.txt";
+  Deno.writeFileSync(filename, data);
+  const dataRead = Deno.readFileSync(filename);
   const dec = new TextDecoder("utf-8");
   const actual = dec.decode(dataRead);
   assertEqual("Hello", actual);
@@ -20,10 +19,10 @@ testPerm({ write: true }, function writeFileSyncFail() {
   // The following should fail because /baddir doesn't exist (hopefully).
   let caughtError = false;
   try {
-    deno.writeFileSync(filename, data);
+    Deno.writeFileSync(filename, data);
   } catch (e) {
     caughtError = true;
-    assertEqual(e.kind, deno.ErrorKind.NotFound);
+    assertEqual(e.kind, Deno.ErrorKind.NotFound);
     assertEqual(e.name, "NotFound");
   }
   assert(caughtError);
@@ -36,46 +35,46 @@ testPerm({ write: false }, function writeFileSyncPerm() {
   // The following should fail due to no write permission
   let caughtError = false;
   try {
-    deno.writeFileSync(filename, data);
+    Deno.writeFileSync(filename, data);
   } 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 writeFileSyncUpdatePerm() {
-  if (deno.platform.os !== "win") {
+  if (Deno.platform.os !== "win") {
     const enc = new TextEncoder();
     const data = enc.encode("Hello");
-    const filename = deno.makeTempDirSync() + "/test.txt";
-    deno.writeFileSync(filename, data, { perm: 0o755 });
-    assertEqual(deno.statSync(filename).mode & 0o777, 0o755);
-    deno.writeFileSync(filename, data, { perm: 0o666 });
-    assertEqual(deno.statSync(filename).mode & 0o777, 0o666);
+    const filename = Deno.makeTempDirSync() + "/test.txt";
+    Deno.writeFileSync(filename, data, { perm: 0o755 });
+    assertEqual(Deno.statSync(filename).mode & 0o777, 0o755);
+    Deno.writeFileSync(filename, data, { perm: 0o666 });
+    assertEqual(Deno.statSync(filename).mode & 0o777, 0o666);
   }
 });
 
 testPerm({ read: true, write: true }, function writeFileSyncCreate() {
   const enc = new TextEncoder();
   const data = enc.encode("Hello");
-  const filename = deno.makeTempDirSync() + "/test.txt";
+  const filename = Deno.makeTempDirSync() + "/test.txt";
   let caughtError = false;
   // if create turned off, the file won't be created
   try {
-    deno.writeFileSync(filename, data, { create: false });
+    Deno.writeFileSync(filename, data, { create: false });
   } catch (e) {
     caughtError = true;
-    assertEqual(e.kind, deno.ErrorKind.NotFound);
+    assertEqual(e.kind, Deno.ErrorKind.NotFound);
     assertEqual(e.name, "NotFound");
   }
   assert(caughtError);
 
   // Turn on create, should have no error
-  deno.writeFileSync(filename, data, { create: true });
-  deno.writeFileSync(filename, data, { create: false });
-  const dataRead = deno.readFileSync(filename);
+  Deno.writeFileSync(filename, data, { create: true });
+  Deno.writeFileSync(filename, data, { create: false });
+  const dataRead = Deno.readFileSync(filename);
   const dec = new TextDecoder("utf-8");
   const actual = dec.decode(dataRead);
   assertEqual("Hello", actual);
@@ -84,21 +83,21 @@ testPerm({ read: true, write: true }, function writeFileSyncCreate() {
 testPerm({ read: true, write: true }, function writeFileSyncAppend() {
   const enc = new TextEncoder();
   const data = enc.encode("Hello");
-  const filename = deno.makeTempDirSync() + "/test.txt";
-  deno.writeFileSync(filename, data);
-  deno.writeFileSync(filename, data, { append: true });
-  let dataRead = deno.readFileSync(filename);
+  const filename = Deno.makeTempDirSync() + "/test.txt";
+  Deno.writeFileSync(filename, data);
+  Deno.writeFileSync(filename, data, { append: true });
+  let dataRead = Deno.readFileSync(filename);
   const dec = new TextDecoder("utf-8");
   let actual = dec.decode(dataRead);
   assertEqual("HelloHello", actual);
   // Now attempt overwrite
-  deno.writeFileSync(filename, data, { append: false });
-  dataRead = deno.readFileSync(filename);
+  Deno.writeFileSync(filename, data, { append: false });
+  dataRead = Deno.readFileSync(filename);
   actual = dec.decode(dataRead);
   assertEqual("Hello", actual);
   // append not set should also overwrite
-  deno.writeFileSync(filename, data);
-  dataRead = deno.readFileSync(filename);
+  Deno.writeFileSync(filename, data);
+  dataRead = Deno.readFileSync(filename);
   actual = dec.decode(dataRead);
   assertEqual("Hello", actual);
 });
@@ -106,9 +105,9 @@ testPerm({ read: true, write: true }, function writeFileSyncAppend() {
 testPerm({ read: true, write: true }, async function writeFileSuccess() {
   const enc = new TextEncoder();
   const data = enc.encode("Hello");
-  const filename = deno.makeTempDirSync() + "/test.txt";
-  await deno.writeFile(filename, data);
-  const dataRead = deno.readFileSync(filename);
+  const filename = Deno.makeTempDirSync() + "/test.txt";
+  await Deno.writeFile(filename, data);
+  const dataRead = Deno.readFileSync(filename);
   const dec = new TextDecoder("utf-8");
   const actual = dec.decode(dataRead);
   assertEqual("Hello", actual);
@@ -121,10 +120,10 @@ testPerm({ read: true, write: true }, async function writeFileNotFound() {
   // The following should fail because /baddir doesn't exist (hopefully).
   let caughtError = false;
   try {
-    await deno.writeFile(filename, data);
+    await Deno.writeFile(filename, data);
   } catch (e) {
     caughtError = true;
-    assertEqual(e.kind, deno.ErrorKind.NotFound);
+    assertEqual(e.kind, Deno.ErrorKind.NotFound);
     assertEqual(e.name, "NotFound");
   }
   assert(caughtError);
@@ -137,46 +136,46 @@ testPerm({ read: true, write: false }, async function writeFilePerm() {
   // The following should fail due to no write permission
   let caughtError = false;
   try {
-    await deno.writeFile(filename, data);
+    await Deno.writeFile(filename, data);
   } 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 }, async function writeFileUpdatePerm() {
-  if (deno.platform.os !== "win") {
+  if (Deno.platform.os !== "win") {
     const enc = new TextEncoder();
     const data = enc.encode("Hello");
-    const filename = deno.makeTempDirSync() + "/test.txt";
-    await deno.writeFile(filename, data, { perm: 0o755 });
-    assertEqual(deno.statSync(filename).mode & 0o777, 0o755);
-    await deno.writeFile(filename, data, { perm: 0o666 });
-    assertEqual(deno.statSync(filename).mode & 0o777, 0o666);
+    const filename = Deno.makeTempDirSync() + "/test.txt";
+    await Deno.writeFile(filename, data, { perm: 0o755 });
+    assertEqual(Deno.statSync(filename).mode & 0o777, 0o755);
+    await Deno.writeFile(filename, data, { perm: 0o666 });
+    assertEqual(Deno.statSync(filename).mode & 0o777, 0o666);
   }
 });
 
 testPerm({ read: true, write: true }, async function writeFileCreate() {
   const enc = new TextEncoder();
   const data = enc.encode("Hello");
-  const filename = deno.makeTempDirSync() + "/test.txt";
+  const filename = Deno.makeTempDirSync() + "/test.txt";
   let caughtError = false;
   // if create turned off, the file won't be created
   try {
-    await deno.writeFile(filename, data, { create: false });
+    await Deno.writeFile(filename, data, { create: false });
   } catch (e) {
     caughtError = true;
-    assertEqual(e.kind, deno.ErrorKind.NotFound);
+    assertEqual(e.kind, Deno.ErrorKind.NotFound);
     assertEqual(e.name, "NotFound");
   }
   assert(caughtError);
 
   // Turn on create, should have no error
-  await deno.writeFile(filename, data, { create: true });
-  await deno.writeFile(filename, data, { create: false });
-  const dataRead = deno.readFileSync(filename);
+  await Deno.writeFile(filename, data, { create: true });
+  await Deno.writeFile(filename, data, { create: false });
+  const dataRead = Deno.readFileSync(filename);
   const dec = new TextDecoder("utf-8");
   const actual = dec.decode(dataRead);
   assertEqual("Hello", actual);
@@ -185,21 +184,21 @@ testPerm({ read: true, write: true }, async function writeFileCreate() {
 testPerm({ read: true, write: true }, async function writeFileAppend() {
   const enc = new TextEncoder();
   const data = enc.encode("Hello");
-  const filename = deno.makeTempDirSync() + "/test.txt";
-  await deno.writeFile(filename, data);
-  await deno.writeFile(filename, data, { append: true });
-  let dataRead = deno.readFileSync(filename);
+  const filename = Deno.makeTempDirSync() + "/test.txt";
+  await Deno.writeFile(filename, data);
+  await Deno.writeFile(filename, data, { append: true });
+  let dataRead = Deno.readFileSync(filename);
   const dec = new TextDecoder("utf-8");
   let actual = dec.decode(dataRead);
   assertEqual("HelloHello", actual);
   // Now attempt overwrite
-  await deno.writeFile(filename, data, { append: false });
-  dataRead = deno.readFileSync(filename);
+  await Deno.writeFile(filename, data, { append: false });
+  dataRead = Deno.readFileSync(filename);
   actual = dec.decode(dataRead);
   assertEqual("Hello", actual);
   // append not set should also overwrite
-  await deno.writeFile(filename, data);
-  dataRead = deno.readFileSync(filename);
+  await Deno.writeFile(filename, data);
+  dataRead = Deno.readFileSync(filename);
   actual = dec.decode(dataRead);
   assertEqual("Hello", actual);
 });