Add back typescript version number and add Deno.version object. (#1788)

1 files changed, 23 insertions, 0 deletions

diff --git a/js/version.ts b/js/version.ts
new file mode 100644
index 000000000..805e565a0
--- /dev/null
+++ b/js/version.ts
@@ -0,0 +1,23 @@
+// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
+interface Version {
+  deno: string;
+  v8: string;
+  typescript: string;
+}
+
+export const version: Version = {
+  deno: "",
+  v8: "",
+  typescript: "TS_VERSION" // This string will be replaced by rollup
+};
+
+/**
+ * Sets the deno and v8 versions and freezes the version object.
+ * @internal
+ */
+export function setVersions(denoVersion: string, v8Version: string): void {
+  version.deno = denoVersion;
+  version.v8 = v8Version;
+
+  Object.freeze(version);
+}