From 5aeeff66422f7398ec8a2e210e309b57f5cd844c Mon Sep 17 00:00:00 2001
From: Jesse Ostrander <jostrander@schramauto.com>
Date: Mon, 22 Aug 2016 17:44:50 -0400
Subject: [PATCH] Update: Throw error if whitespace found in plugin name (fixes
 #6854)

---
 lib/config/plugins.js         | 10 ++++++++++
 messages/whitespace-found.txt |  3 +++
 tests/lib/config/plugins.js   |  6 ++++++
 3 files changed, 19 insertions(+)
 create mode 100644 messages/whitespace-found.txt

diff --git a/lib/config/plugins.js b/lib/config/plugins.js
index 08695f36ab78..7fcc035a74a6 100644
--- a/lib/config/plugins.js
+++ b/lib/config/plugins.js
@@ -108,6 +108,16 @@ module.exports = {
             pluginNameWithoutPrefix = removePrefix(pluginNameWithoutNamespace);
         let plugin = null;
 
+        if (pluginName.indexOf(" ") >= 0) {
+            const whitespaceError = new Error("Whitespace found in plugin name eslint-plugin-" + pluginNameWithoutPrefix);
+
+            whitespaceError.messageTemplate = "whitespace-found";
+            whitespaceError.messageData = {
+                pluginName: pluginNameWithoutPrefix
+            };
+            throw whitespaceError;
+        }
+
         if (!plugins[pluginNameWithoutPrefix]) {
             try {
                 plugin = require(pluginNamespace + PLUGIN_NAME_PREFIX + pluginNameWithoutPrefix);
diff --git a/messages/whitespace-found.txt b/messages/whitespace-found.txt
new file mode 100644
index 000000000000..7746f3533708
--- /dev/null
+++ b/messages/whitespace-found.txt
@@ -0,0 +1,3 @@
+ESLint couldn't find the plugin "eslint-plugin-<%- pluginName %>". It looks like there is whitespace in the plugin name.
+
+If you still can't figure out the problem, please stop by https://gitter.im/eslint/eslint to chat with the team.
diff --git a/tests/lib/config/plugins.js b/tests/lib/config/plugins.js
index 31d6be54fdb2..338008876317 100644
--- a/tests/lib/config/plugins.js
+++ b/tests/lib/config/plugins.js
@@ -82,6 +82,12 @@ describe("Plugins", function() {
             assert.deepEqual(Rules.get("example/qux"), plugin.rules.qux);
         });
 
+        it("should throw an error when a plugin has whitespace", function() {
+            assert.throws(function() {
+                StubbedPlugins.load("whitespace ");
+            }, /Whitespace found in plugin name/);
+        });
+
         it("should throw an error when a plugin doesn't exist", function() {
             assert.throws(function() {
                 StubbedPlugins.load("nonexistentplugin");