refactor(std): add std/_util/os.ts module (#8370)

This commit adds "std/_util/os.ts" module which contains
common os detection logic and is browser compatible.

Co-authored-by: Nayeem Rahman <nayeemrmn99@gmail.com>

1 files changed, 18 insertions, 0 deletions

diff --git a/std/_util/os.ts b/std/_util/os.ts
new file mode 100644
index 000000000..50c70b134
--- /dev/null
+++ b/std/_util/os.ts
@@ -0,0 +1,18 @@
+// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
+// This module is browser compatible.
+
+export const osType = (() => {
+  if (globalThis.Deno != null) {
+    return Deno.build.os;
+  }
+
+  // deno-lint-ignore no-explicit-any
+  const navigator = (globalThis as any).navigator;
+  if (navigator?.appVersion?.includes?.("Win") ?? false) {
+    return "windows";
+  }
+
+  return "linux";
+})();
+
+export const isWindows = osType === "windows";