1 files changed, 57 insertions, 0 deletions
diff --git a/tools/lint/eslint/eslint-plugin-mozilla/lib/rules/no-aArgs.js b/tools/lint/eslint/eslint-plugin-mozilla/lib/rules/no-aArgs.js
new file mode 100644
index 0000000000..7135890761
--- /dev/null
+++ b/tools/lint/eslint/eslint-plugin-mozilla/lib/rules/no-aArgs.js
@@ -0,0 +1,57 @@
+/**
+ * @fileoverview warns against using hungarian notation in function arguments
+ * (i.e. aArg).
+ *
+ * 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";
+
+function isPrefixed(name) {
+  return name.length >= 2 && /^a[A-Z]/.test(name);
+}
+
+function deHungarianize(name) {
+  return name.substring(1, 2).toLowerCase() + name.substring(2, name.length);
+}
+
+module.exports = {
+  meta: {
+    docs: {
+      url: "https://firefox-source-docs.mozilla.org/code-quality/lint/linters/eslint-plugin-mozilla/rules/no-aArgs.html",
+    },
+    messages: {
+      dontUseHungarian:
+        "Parameter '{{name}}' uses Hungarian Notation, consider using '{{suggestion}}' instead.",
+    },
+    schema: [],
+    type: "layout",
+  },
+
+  create(context) {
+    function checkFunction(node) {
+      for (var i = 0; i < node.params.length; i++) {
+        var param = node.params[i];
+        if (param.name && isPrefixed(param.name)) {
+          var errorObj = {
+            name: param.name,
+            suggestion: deHungarianize(param.name),
+          };
+          context.report({
+            node: param,
+            messageId: "dontUseHungarian",
+            data: errorObj,
+          });
+        }
+      }
+    }
+
+    return {
+      FunctionDeclaration: checkFunction,
+      ArrowFunctionExpression: checkFunction,
+      FunctionExpression: checkFunction,
+    };
+  },
+};