esm: add -m alias for --type=module

Author: GeoffreyBooth

.eslintrc.js

@@ -39,6 +39,7 @@ module.exports = {
       files: [
         'doc/api/esm.md',
         'test/es-module/test-esm-type-flag.js',
+        'test/es-module/test-esm-type-flag-alias.js',
         '*.mjs',
       ],
       parserOptions: { sourceType: 'module' },

src/node_options.cc

@@ -249,6 +249,7 @@ EnvironmentOptionsParser::EnvironmentOptionsParser() {
             "top-level module type name",
             &EnvironmentOptions::module_type,
             kAllowedInEnvironment);
+  AddAlias("-m", { "--type", "module" });
 
   AddOption("--check",
             "syntax check script without executing",

test/es-module/test-esm-type-flag-alias.js

@@ -0,0 +1,6 @@
+// Flags: --experimental-modules -m
+/* eslint-disable node-core/required-modules */
+import { message } from '../fixtures/es-modules/message.mjs';
+import assert from 'assert';
+
+assert.strictEqual(message, 'A message');