fix: adding validation for scoped packages that begin with one or more periods

Author: shmam

lib/index.js

@@ -30,7 +30,7 @@ function validate (name) {
     errors.push('name length must be greater than zero')
   }
 
-  if (name.match(/^\./)) {
+  if (name.startsWith('.')) {
     errors.push('name cannot start with a period')
   }
 
@@ -75,6 +75,11 @@ function validate (name) {
     if (nameMatch) {
       var user = nameMatch[1]
       var pkg = nameMatch[2]
+
+      if (pkg.startsWith('.')) {
+        errors.push('name cannot start with a period')
+      }
+
       if (encodeURIComponent(user) === user && encodeURIComponent(pkg) === pkg) {
         return done(warnings, errors)
       }

test/index.js

@@ -53,6 +53,21 @@ test('validate-npm-package-name', function (t) {
     validForOldPackages: false,
     errors: ['name cannot start with a period'] })
 
+  t.same(validate('@npm/.'), {
+    validForNewPackages: false,
+    validForOldPackages: false,
+    errors: ['name cannot start with a period'] })
+
+  t.same(validate('@npm/..'), {
+    validForNewPackages: false,
+    validForOldPackages: false,
+    errors: ['name cannot start with a period'] })
+
+  t.same(validate('@npm/.package'), {
+    validForNewPackages: false,
+    validForOldPackages: false,
+    errors: ['name cannot start with a period'] })
+
   t.same(validate('_start-with-underscore'), {
     validForNewPackages: false,
     validForOldPackages: false,