Add linting.

.eslintrc.js

@@ -0,0 +1,24 @@
+"use strict";
+
+module.exports = {
+  extends: [
+    "plugin:mozilla/recommended",
+  ],
+
+  plugins: [
+    "mozilla",
+  ],
+
+  parserOptions: {
+    sourceType: "module"
+  },
+
+  rules: {
+    "no-return-await": ["off"],
+    "valid-jsdoc": ["error", {
+      requireReturn: false,
+      requireParamDescription: false,
+      requireReturnDescription: false,
+    }],
+  },
+};

.gitignore

@@ -1,2 +1,3 @@
 .DS_Store
 /shield-study-js-errors.xpi
+node_modules

Makefile

@@ -13,6 +13,9 @@ build: shield-study-js-errors.xpi
 clean:
 	rm -f shield-study-js-errors.xpi
 
+lint:
+	npm run lint
+
 shield-study-js-errors.xpi: $(EXTENSION_FILES)
 	pushd extension; \
 	zip -r shield-study-js-errors.xpi ./*; \

README.md

@@ -50,6 +50,13 @@ Nightly:
 - `xpinstall.signatures.required`
 - `extensions.allow-non-mpc-extensions`
 
+Linting can be run on the add-on using `make lint`:
+
+```sh
+$ npm install # If they haven't been installed yet
+$ make lint
+```
+
 ## License
 Shield Study: JavaScript Errors is licensed under the MPLv2. See the `LICENSE`
 file for details.

extension/bootstrap.js

@@ -28,12 +28,12 @@ function generateFingerprint(error) {
 this.install = function() {};
 
 this.startup = function() {
-  logger = Log.repository.getLogger('shield-study-js-errors');
+  logger = Log.repository.getLogger("shield-study-js-errors");
   logger.addAppender(new Log.ConsoleAppender(new Log.BasicFormatter()));
   logger.level = Services.prefs.getIntPref(
     "extensions.shield-study-js-errors@shield.mozilla.org.logLevel",
     Log.Level.Warn,
-  );;
+  );
 
   ErrorReporting.startup();
 
@@ -58,7 +58,7 @@ this.startup = function() {
       addClientId: true,
       addEnvironment: true,
     });
-  })
+  });
 };
 
 this.shutdown = function() {

package.json

@@ -0,0 +1,17 @@
+{
+  "title": "Shield Study: JavaScript Errors",
+  "version": "0.1.0",
+  "description": "A Shield study to test collecting JavaScript errors thrown by Firefox chrome code",
+  "private": true,
+  "author": "Michael Kelly <mkelly@mozilla.com>",
+  "repository": "https://github.com/mozilla/shield-study-js-errors",
+  "license": "MPL-2.0",
+  "scripts": {
+    "lint": "eslint extension || true"
+  },
+  "devDependencies": {
+    "eslint": "^4.12.1",
+    "eslint-plugin-mozilla": "^0.4.9",
+    "eslint-plugin-no-unsanitized": "^2.0.2"
+  }
+}