From fdf1d6e93494938d6f6e8791d06a31324b8e50db Mon Sep 17 00:00:00 2001
From: Liam Murphy <43807659+Liamolucko@users.noreply.github.com>
Date: Wed, 6 Jan 2021 10:42:40 +1100
Subject: [PATCH] fix(node): resolve files in symlinked directories
 (denoland/deno#8840)

---
 node/module.ts                     | 11 +----------
 node/module_test.ts                |  5 +++++
 node/tests/cjs/dir                 |  1 +
 node/tests/cjs/subdir/dir/index.js |  4 ++++
 4 files changed, 11 insertions(+), 10 deletions(-)
 create mode 120000 node/tests/cjs/dir
 create mode 100644 node/tests/cjs/subdir/dir/index.js

diff --git a/node/module.ts b/node/module.ts
index f10fc2ca74fb..a7052668ae4f 100644
--- a/node/module.ts
+++ b/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
diff --git a/node/module_test.ts b/node/module_test.ts
index 2faaff57505d..86fb1d386680 100644
--- a/node/module_test.ts
+++ b/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");
+});
diff --git a/node/tests/cjs/dir b/node/tests/cjs/dir
new file mode 120000
index 000000000000..abec30059cad
--- /dev/null
+++ b/node/tests/cjs/dir
@@ -0,0 +1 @@
+./subdir/dir
\ No newline at end of file
diff --git a/node/tests/cjs/subdir/dir/index.js b/node/tests/cjs/subdir/dir/index.js
new file mode 100644
index 000000000000..0b4d11386830
--- /dev/null
+++ b/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 };