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>

4 files changed, 4 insertions, 18 deletions

diff --git a/std/path/_constants.ts b/std/path/_constants.ts
index d26334b55..78755529b 100644
--- a/std/path/_constants.ts
+++ b/std/path/_constants.ts
@@ -46,17 +46,3 @@ export const CHAR_EQUAL = 61; /* = */
 // Digits
 export const CHAR_0 = 48; /* 0 */
 export const CHAR_9 = 57; /* 9 */
-
-let NATIVE_OS: typeof Deno.build.os = "linux";
-// deno-lint-ignore no-explicit-any
-const navigator = (globalThis as any).navigator;
-if (globalThis.Deno != null) {
-  NATIVE_OS = Deno.build.os;
-} else if (navigator?.appVersion?.includes?.("Win") ?? false) {
-  NATIVE_OS = "windows";
-}
-// TODO(nayeemrmn): Improve OS detection in browsers beyond Windows.
-
-export const isWindows = NATIVE_OS == "windows";
-
-export { NATIVE_OS };
diff --git a/std/path/glob.ts b/std/path/glob.ts
index fde2fe8e2..a9cd70143 100644
--- a/std/path/glob.ts
+++ b/std/path/glob.ts
@@ -1,7 +1,7 @@
 // Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
 // This module is browser compatible.
 
-import { NATIVE_OS } from "./_constants.ts";
+import { osType } from "../_util/os.ts";
 import { join, normalize } from "./mod.ts";
 import { SEP, SEP_PATTERN } from "./separator.ts";
 
@@ -80,7 +80,7 @@ const rangeEscapeChars = ["-", "\\", "]"];
  *   the group occurs not nested at the end of the segment. */
 export function globToRegExp(
   glob: string,
-  { extended = true, globstar: globstarOption = true, os = NATIVE_OS }:
+  { extended = true, globstar: globstarOption = true, os = osType }:
     GlobToRegExpOptions = {},
 ): RegExp {
   if (glob == "") {
diff --git a/std/path/mod.ts b/std/path/mod.ts
index 58c2c4561..8819bf25f 100644
--- a/std/path/mod.ts
+++ b/std/path/mod.ts
@@ -2,7 +2,7 @@
 // Ported mostly from https://github.com/browserify/path-browserify/
 /** This module is browser compatible. */
 
-import { isWindows } from "./_constants.ts";
+import { isWindows } from "../_util/os.ts";
 import * as _win32 from "./win32.ts";
 import * as _posix from "./posix.ts";
 
diff --git a/std/path/separator.ts b/std/path/separator.ts
index 4b54ad438..61bb7c588 100644
--- a/std/path/separator.ts
+++ b/std/path/separator.ts
@@ -1,7 +1,7 @@
 // Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
 /** This module is browser compatible. */
 
-import { isWindows } from "./_constants.ts";
+import { isWindows } from "../_util/os.ts";
 
 export const SEP = isWindows ? "\\" : "/";
 export const SEP_PATTERN = isWindows ? /[\\/]+/ : /\/+/;