lib: further cleanup platform utility methods

Author: danielbayley

lib/fs.js

@@ -94,6 +94,8 @@ const {
   },
   SideEffectFreeRegExpPrototypeExec,
   defineLazyProperties,
+  isWindows,
+  isMacOS,
 } = require('internal/util');
 const {
   constants: {
@@ -167,9 +169,6 @@ let kResistStopPropagation;
 let FileReadStream;
 let FileWriteStream;
 
-const isWindows = process.platform === 'win32';
-const isOSX = process.platform === 'darwin';
-
 function showTruncateDeprecation() {
   if (truncateWarn) {
     process.emitWarning(
@@ -2442,7 +2441,7 @@ function watch(filename, options, listener) {
   // TODO(anonrig): Remove non-native watcher when/if libuv supports recursive.
   // As of November 2022, libuv does not support recursive file watch on all platforms,
   // e.g. Linux due to the limitations of inotify.
-  if (options.recursive && !isOSX && !isWindows) {
+  if (options.recursive && !isMacOS && !isWindows) {
     const nonNativeWatcher = require('internal/fs/recursive_watch');
     watcher = new nonNativeWatcher.FSWatcher(options);
     watcher[watchers.kFSWatchStart](path);

lib/net.js

@@ -115,7 +115,12 @@ const {
 } = require('internal/errors');
 const { isUint8Array } = require('internal/util/types');
 const { queueMicrotask } = require('internal/process/task_queues');
-const { kEmptyObject, guessHandleType, promisify } = require('internal/util');
+const {
+  kEmptyObject,
+  guessHandleType,
+  promisify,
+  isWindows
+} = require('internal/util');
 const {
   validateAbortSignal,
   validateBoolean,
@@ -142,8 +147,6 @@ const { kTimeout } = require('internal/timers');
 const DEFAULT_IPV4_ADDR = '0.0.0.0';
 const DEFAULT_IPV6_ADDR = '::';
 
-const isWindows = process.platform === 'win32';
-
 const noop = () => {};
 
 const kPerfHooksNetConnectContext = Symbol('kPerfHooksNetConnectContext');

lib/os.js

@@ -33,7 +33,7 @@ const {
 
 const { safeGetenv } = internalBinding('credentials');
 const constants = internalBinding('constants').os;
-const isWindows = process.platform === 'win32';
+const { isWindows } = require('internal/util');
 
 const {
   codes: {