fix(std/node): resolve files in symlinked directories (#8840)

std/node/module.ts

@@ -764,16 +764,7 @@ function tryFile(requestPath: string, _isMain: boolean): string | false {
 }
 
 function toRealPath(requestPath: string): string {
-  // Deno does not have realpath implemented yet.
-  let fullPath = requestPath;
-  while (true) {
-    try {
-      fullPath = Deno.readLinkSync(fullPath);
-    } catch {
-      break;
-    }
-  }
-  return path.resolve(requestPath);
+  return Deno.realPathSync(requestPath);
 }
 
 // Given a path, check if the file exists with any of the set extensions

std/node/module_test.ts

@@ -69,3 +69,8 @@ Deno.test("requireStack", function () {
     assertStringIncludes(e.stack, "/tests/cjs/cjs_throw.js");
   }
 });
+
+Deno.test("requireFileInSymlinkDir", () => {
+  const { C } = require("./tests/cjs/dir");
+  assertEquals(C, "C");
+});

std/node/tests/cjs/dir

@@ -0,0 +1 @@
+./subdir/dir

std/node/tests/cjs/subdir/dir/index.js

@@ -0,0 +1,4 @@
+// deno-lint-ignore-file no-undef
+const C = require("../cjs_c");
+
+module.exports = { C };