fix(cli): add file URL support for Deno.readLink (#8423)

cli/dts/lib.deno.ns.d.ts

@@ -1491,7 +1491,7 @@ declare namespace Deno {
    * Throws TypeError if called with a hard link
    *
    * Requires `allow-read` permission. */
-  export function readLinkSync(path: string): string;
+  export function readLinkSync(path: string | URL): string;
 
   /** Resolves to the full path destination of the named symbolic link.
    *
@@ -1503,7 +1503,7 @@ declare namespace Deno {
    * Throws TypeError if called with a hard link
    *
    * Requires `allow-read` permission. */
-  export function readLink(path: string): Promise<string>;
+  export function readLink(path: string | URL): Promise<string>;
 
   /** Resolves to a `Deno.FileInfo` for the specified `path`. If `path` is a
    * symlink, information for the symlink will be returned instead of what it

cli/rt/30_fs.js

@@ -128,11 +128,11 @@
   }
 
   function readLinkSync(path) {
-    return core.jsonOpSync("op_read_link_sync", { path });
+    return core.jsonOpSync("op_read_link_sync", { path: pathFromURL(path) });
   }
 
   function readLink(path) {
-    return core.jsonOpAsync("op_read_link_async", { path });
+    return core.jsonOpAsync("op_read_link_async", { path: pathFromURL(path) });
   }
 
   function realPathSync(path) {

cli/tests/unit/read_link_test.ts

@@ -3,6 +3,7 @@ import {
   assertEquals,
   assertThrows,
   assertThrowsAsync,
+  pathToAbsoluteFileUrl,
   unitTest,
 } from "./test_util.ts";
 
@@ -21,6 +22,21 @@ unitTest(
   },
 );
 
+unitTest(
+  { perms: { write: true, read: true } },
+  function readLinkSyncUrlSuccess(): void {
+    const testDir = Deno.makeTempDirSync();
+    const target = testDir +
+      (Deno.build.os == "windows" ? "\\target" : "/target");
+    const symlink = testDir +
+      (Deno.build.os == "windows" ? "\\symlink" : "/symlink");
+    Deno.mkdirSync(target);
+    Deno.symlinkSync(target, symlink);
+    const targetPath = Deno.readLinkSync(pathToAbsoluteFileUrl(symlink));
+    assertEquals(targetPath, target);
+  },
+);
+
 unitTest({ perms: { read: false } }, function readLinkSyncPerm(): void {
   assertThrows(() => {
     Deno.readLinkSync("/symlink");
@@ -48,6 +64,21 @@ unitTest(
   },
 );
 
+unitTest(
+  { perms: { write: true, read: true } },
+  async function readLinkUrlSuccess(): Promise<void> {
+    const testDir = Deno.makeTempDirSync();
+    const target = testDir +
+      (Deno.build.os == "windows" ? "\\target" : "/target");
+    const symlink = testDir +
+      (Deno.build.os == "windows" ? "\\symlink" : "/symlink");
+    Deno.mkdirSync(target);
+    Deno.symlinkSync(target, symlink);
+    const targetPath = await Deno.readLink(pathToAbsoluteFileUrl(symlink));
+    assertEquals(targetPath, target);
+  },
+);
+
 unitTest({ perms: { read: false } }, async function readLinkPerm(): Promise<
   void
 > {