1 files changed, 56 insertions, 1 deletions
diff --git a/std/node/fs.ts b/std/node/fs.ts
index 539916c9e..eb6830acb 100644..100755
--- a/std/node/fs.ts
+++ b/std/node/fs.ts
@@ -3,7 +3,12 @@ import {
   intoCallbackAPIWithIntercept,
   MaybeEmpty
 } from "./_utils.ts";
-const { readFile: denoReadFile, readFileSync: denoReadFileSync } = Deno;
+const {
+  readFile: denoReadFile,
+  readFileSync: denoReadFileSync,
+  readlink: denoReadlink,
+  readlinkSync: denoReadlinkSync
+} = Deno;
 
 type ReadFileCallback = (
   err: MaybeEmpty<Error>,
@@ -15,6 +20,15 @@ interface ReadFileOptions {
   flag?: string;
 }
 
+type ReadlinkCallback = (
+  err: MaybeEmpty<Error>,
+  linkString: MaybeEmpty<string | Uint8Array>
+) => void;
+
+interface ReadlinkOptions {
+  encoding?: string | null;
+}
+
 function getEncoding(
   optOrCallback?: ReadFileOptions | ReadFileCallback
 ): string | null {
@@ -27,6 +41,8 @@ function getEncoding(
         optOrCallback.encoding === "utf-8"
       ) {
         return "utf8";
+      } else if (optOrCallback.encoding === "buffer") {
+        return "buffer";
       } else {
         notImplemented();
       }
@@ -45,6 +61,16 @@ function maybeDecode(
   return data;
 }
 
+function maybeEncode(
+  data: string,
+  encoding: string | null
+): string | Uint8Array {
+  if (encoding === "buffer") {
+    return new TextEncoder().encode(data);
+  }
+  return data;
+}
+
 export function readFile(
   path: string,
   optOrCallback: ReadFileCallback | ReadFileOptions,
@@ -73,3 +99,32 @@ export function readFileSync(
 ): string | Uint8Array {
   return maybeDecode(denoReadFileSync(path), getEncoding(opt));
 }
+
+export function readlink(
+  path: string,
+  optOrCallback: ReadlinkCallback | ReadlinkOptions,
+  callback?: ReadlinkCallback
+): void {
+  let cb: ReadlinkCallback | undefined;
+  if (typeof optOrCallback === "function") {
+    cb = optOrCallback;
+  } else {
+    cb = callback;
+  }
+
+  const encoding = getEncoding(optOrCallback);
+
+  intoCallbackAPIWithIntercept<string, Uint8Array | string>(
+    denoReadlink,
+    (data: string): string | Uint8Array => maybeEncode(data, encoding),
+    cb,
+    path
+  );
+}
+
+export function readlinkSync(
+  path: string,
+  opt?: ReadlinkOptions
+): string | Uint8Array {
+  return maybeEncode(denoReadlinkSync(path), getEncoding(opt));
+}