1 files changed, 52 insertions, 0 deletions
diff --git a/tools/lint/eslint/eslint-plugin-mozilla/lib/rules/use-cc-etc.js b/tools/lint/eslint/eslint-plugin-mozilla/lib/rules/use-cc-etc.js
new file mode 100644
index 0000000000..fe2e0b518d
--- /dev/null
+++ b/tools/lint/eslint/eslint-plugin-mozilla/lib/rules/use-cc-etc.js
@@ -0,0 +1,52 @@
+/**
+ * @fileoverview Reject use of Components.classes etc, prefer the shorthand instead.
+ *
+ * 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 componentsMap = {
+  classes: "Cc",
+  interfaces: "Ci",
+  results: "Cr",
+  utils: "Cu",
+};
+
+module.exports = {
+  meta: {
+    docs: {
+      url: "https://firefox-source-docs.mozilla.org/code-quality/lint/linters/eslint-plugin-mozilla/use-cc-etc.html",
+    },
+    fixable: "code",
+    schema: [],
+    type: "suggestion",
+  },
+
+  create(context) {
+    return {
+      MemberExpression(node) {
+        if (
+          node.object.type === "Identifier" &&
+          node.object.name === "Components" &&
+          node.property.type === "Identifier" &&
+          Object.getOwnPropertyNames(componentsMap).includes(node.property.name)
+        ) {
+          context.report({
+            node,
+            message: `Use ${
+              componentsMap[node.property.name]
+            } rather than Components.${node.property.name}`,
+            fix: fixer =>
+              fixer.replaceTextRange(
+                [node.range[0], node.range[1]],
+                componentsMap[node.property.name]
+              ),
+          });
+        }
+      },
+    };
+  },
+};