fs: runtime deprecate dirent.path

doc/api/deprecations.md

@@ -3551,6 +3551,9 @@ Please use `value instanceof WebAssembly.Module` instead.
 
 <!-- YAML
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/51050
+    description: Runtime deprecation.
   - version:
     - v21.5.0
     - v20.12.0
@@ -3559,7 +3562,7 @@ changes:
     description: Documentation-only deprecation.
 -->
 
-Type: Documentation-only
+Type: Runtime
 
 The [`dirent.path`][] is deprecated due to its lack of consistency across
 release lines. Please use [`dirent.parentPath`][] instead.

doc/api/fs.md

@@ -6763,13 +6763,17 @@ deprecated:
   - v21.5.0
   - v20.12.0
   - v18.20.0
+changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/51050
+    description: Accessing this property emits a warning. It is now read-only.
 -->
 
 > Stability: 0 - Deprecated: Use [`dirent.parentPath`][] instead.
 
 * {string}
 
-Alias for `dirent.parentPath`.
+Alias for `dirent.parentPath`. Read-only.
 
 ### Class: `fs.FSWatcher`
 

lib/internal/fs/utils.js

@@ -171,7 +171,6 @@ class Dirent {
   constructor(name, type, path) {
     this.name = name;
     this.parentPath = path;
-    this.path = path;
     this[kType] = type;
   }
 
@@ -220,6 +219,15 @@ for (const name of ReflectOwnKeys(Dirent.prototype)) {
   };
 }
 
+ObjectDefineProperty(Dirent.prototype, 'path', {
+  __proto__: null,
+  get: deprecate(function() {
+    return this.parentPath;
+  }, 'dirent.path is deprecated in favor of dirent.parentPath', 'DEP0178'),
+  configurable: true,
+  enumerable: false,
+});
+
 function copyObject(source) {
   const target = {};
   for (const key in source)

test/parallel/test-fs-utils-get-dirents.js

@@ -88,6 +88,11 @@ const filename = 'foo';
     common.mustCall((err, dirent) => {
       assert.strictEqual(err, null);
       assert.strictEqual(dirent.name, filenameBuffer);
+      common.expectWarning(
+        'DeprecationWarning',
+        'dirent.path is deprecated in favor of dirent.parentPath',
+        'DEP0178');
+      assert.deepStrictEqual(dirent.path, Buffer.from(tmpdir.resolve(`${filename}/`)));
     },
     ));
 }