Fix list command not processing main with multiple files, closes #660.

lib/commands/list.js

@@ -81,9 +81,30 @@ function paths(flattened) {
     var ret = {};
 
     mout.object.forOwn(flattened, function (pkg, name) {
-        if (!pkg.missing) {
-            ret[name] = path.normalize(pkg.canonicalDir + '/' + (pkg.pkgMeta.main || ''));
+        var main;
+
+        if (pkg.missing) {
+            return;
         }
+
+        main = pkg.pkgMeta.main;
+
+        if (!main) {
+            ret[name] = pkg.canonicalDir;
+            return;
+        }
+
+        // Normalize main
+        if (typeof main === 'string') {
+            main = main.split(',');
+        }
+
+        // Concatenate each main entry with the canonical dir
+        main = main.map(function (part) {
+            return path.join(pkg.canonicalDir, part).trim();
+        }).join(',');
+
+        ret[name] = main;
     });
 
     return ret;