1 files changed, 57 insertions, 0 deletions
diff --git a/tools/lint/eslint/eslint-plugin-mozilla/lib/rules/no-define-cc-etc.js b/tools/lint/eslint/eslint-plugin-mozilla/lib/rules/no-define-cc-etc.js
new file mode 100644
index 0000000000..05e7648632
--- /dev/null
+++ b/tools/lint/eslint/eslint-plugin-mozilla/lib/rules/no-define-cc-etc.js
@@ -0,0 +1,57 @@
+/**
+ * @fileoverview Reject defining Cc/Ci/Cr/Cu.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+"use strict";
+
+const componentsBlacklist = ["Cc", "Ci", "Cr", "Cu"];
+
+module.exports = {
+  meta: {
+    docs: {
+      url: "https://firefox-source-docs.mozilla.org/code-quality/lint/linters/eslint-plugin-mozilla/rules/no-define-cc-etc.html",
+    },
+    messages: {
+      noSeparateDefinition:
+        "{{name}} is now defined in global scope, a separate definition is no longer necessary.",
+    },
+    schema: [],
+    type: "suggestion",
+  },
+
+  create(context) {
+    return {
+      VariableDeclarator(node) {
+        if (
+          node.id.type == "Identifier" &&
+          componentsBlacklist.includes(node.id.name)
+        ) {
+          context.report({
+            node,
+            messageId: "noSeparateDefinition",
+            data: { name: node.id.name },
+          });
+        }
+
+        if (node.id.type == "ObjectPattern") {
+          for (let property of node.id.properties) {
+            if (
+              property.type == "Property" &&
+              componentsBlacklist.includes(property.value.name)
+            ) {
+              context.report({
+                node,
+                messageId: "noSeparateDefinition",
+                data: { name: property.value.name },
+              });
+            }
+          }
+        }
+      },
+    };
+  },
+};