5 files changed, 42 insertions, 0 deletions
diff --git a/js/deno.ts b/js/deno.ts
index 7d52441ec..9be05e916 100644
--- a/js/deno.ts
+++ b/js/deno.ts
@@ -12,4 +12,5 @@ export { symlinkSync, symlink } from "./symlink";
 export { writeFileSync, writeFile } from "./write_file";
 export { ErrorKind, DenoError } from "./errors";
 export { libdeno } from "./libdeno";
+export { arch, platform } from "./platform";
 export const argv: string[] = [];
diff --git a/js/platform.ts b/js/platform.ts
new file mode 100644
index 000000000..26fc317a1
--- /dev/null
+++ b/js/platform.ts
@@ -0,0 +1,5 @@
+// Dummy. Injected in rollup.config.js
+import { DenoArch, DenoPlatform } from "./types";
+
+export const arch: DenoArch = "unknown";
+export const platform: DenoPlatform = "unknown";
diff --git a/js/platform_test.ts b/js/platform_test.ts
new file mode 100644
index 000000000..80a1d9325
--- /dev/null
+++ b/js/platform_test.ts
@@ -0,0 +1,9 @@
+// Copyright 2018 the Deno authors. All rights reserved. MIT license.
+import { test, assert } from "./test_util.ts";
+import * as deno from "deno";
+
+test(function transformPlatformSuccess() {
+  // Make sure they are transformed
+  assert(deno.arch !== "unknown");
+  assert(deno.platform !== "unknown");
+});
diff --git a/js/types.ts b/js/types.ts
index 7af0a5201..7a7bc44d9 100644
--- a/js/types.ts
+++ b/js/types.ts
@@ -151,3 +151,29 @@ declare global {
     stackTraceLimit: number;
   }
 }
+
+// Based on Node's arch
+export type DenoArch =
+  | "arm"
+  | "arm64"
+  | "ia32"
+  | "mips"
+  | "mipsel"
+  | "ppc"
+  | "ppc64"
+  | "s390"
+  | "s390x"
+  | "x32"
+  | "x64"
+  | "unknown";
+
+export type DenoPlatform =
+  | "aix"
+  | "darwin"
+  | "freebsd"
+  | "linux"
+  | "openbsd"
+  | "sunos"
+  | "win32"
+  | "android"
+  | "unknown";
diff --git a/js/unit_tests.ts b/js/unit_tests.ts
index f1eed319e..a535aea55 100644
--- a/js/unit_tests.ts
+++ b/js/unit_tests.ts
@@ -14,3 +14,4 @@ import "./rename_test.ts";
 import "./blob_test.ts";
 import "./timers_test.ts";
 import "./symlink_test.ts";
+import "./platform_test.ts";