Implement require.resolve.

benjamn · Feb 27, 2016 · ff6b25d · ff6b25d
1 parent 7da0fb3
commit ff6b25d
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diff --git a/install.js b/install.js
@@ -95,6 +95,12 @@ makeInstaller = function (options) {
       throw error;
     }
 
+    require.resolve = function (id) {
+      var f = fileResolve(file, id);
+      if (f) return f.m.id;
+      throw new Error("Cannot find module '" + id + "'");
+    };
+
     // A function that immediately returns true iff all the transitive
     // dependencies of the module identified by id have been installed.
     // This function can be used with options.onInstall to implement

diff --git a/test/run.js b/test/run.js
@@ -408,6 +408,10 @@ describe("install", function () {
 
     assert.strictEqual(require.ready("./dir/d"), true);
     assert.strictEqual(require("./dir/d").id, "/dir/node_modules/e.js");
+    assert.strictEqual(
+      require.resolve("./dir/d"),
+      "/dir/node_modules/e.js"
+    );
   });
 
   it("avoids circular package.json resolution chains", function () {