Register ecmascript modules

index.js

@@ -118,6 +118,15 @@ function wrapFastify (instance, pluginOpts) {
   // *** register
   const originalRegister = instance.register
   instance.register = function wrapRegister (pluginFn, opts) {
+    if (isPromiseLike(pluginFn)) {
+      instance.log.warn('Promise like plugin functions are not supported by fastify-overview.')
+      return originalRegister.call(this, pluginFn, opts)
+    }
+
+    if (isBundledOrTypescriptPlugin(pluginFn)) {
+      pluginFn = pluginFn.default
+    }
+
     if (pluginOpts.addSource) {
       // this Symbol is processed by the `onRegister` hook if necessary
       pluginFn[kSourceRegister] = getSource()[0]
@@ -167,6 +176,24 @@ function wrapFastify (instance, pluginOpts) {
   }
 }
 
+// From https://github.com/fastify/avvio/blob/a153be8358ece6a1ed970d0bee2c28a8230175b9/lib/is-bundled-or-typescript-plugin.js#L13-L19
+function isBundledOrTypescriptPlugin (maybeBundledOrTypescriptPlugin) {
+  return (
+    maybeBundledOrTypescriptPlugin !== null &&
+    typeof maybeBundledOrTypescriptPlugin === 'object' &&
+    typeof maybeBundledOrTypescriptPlugin.default === 'function'
+  )
+}
+
+// From https://github.com/fastify/avvio/blob/a153be8358ece6a1ed970d0bee2c28a8230175b9/lib/is-promise-like.js#L7-L13
+function isPromiseLike (maybePromiseLike) {
+  return (
+    maybePromiseLike !== null &&
+    typeof maybePromiseLike === 'object' &&
+    typeof maybePromiseLike.then === 'function'
+  )
+}
+
 function wrapDecorator (instance, type, { addSource, onDecorateDefinition }) {
   const originalDecorate = instance[type]
   instance[type] = function wrapDecorate (name, value) {

package.json

@@ -8,7 +8,7 @@
     "lint": "standard && npm run lint:typescript",
     "lint:fix": "standard --fix && npm run lint:typescript -- --fix",
     "lint:typescript": "standard --parser @typescript-eslint/parser --plugin @typescript-eslint/eslint-plugin *.ts test/**/*.ts",
-    "test": "tap test/**/*.test.js && npm run test:typescript",
+    "test": "tap test/**/*.test.{js,mjs} && npm run test:typescript",
     "test:typescript": "tsd"
   },
   "repository": {

test/ecmascript-modules.test.mjs

@@ -0,0 +1,49 @@
+import t from 'tap'
+import Fastify from 'fastify'
+import fastifyOverview from '../index.js'
+
+// See https://github.com/Eomm/fastify-overview/issues/98#issuecomment-1943830833 for more details
+
+t.test('register module namespace object', async t => {
+  const app = Fastify()
+  await app.register(fastifyOverview, { addSource: true })
+
+  app.register(await import('./sources/module.mjs'))
+
+  try {
+    await app.ready()
+  } catch (e) {
+    t.fail()
+  }
+
+  const overview = app.overview()
+
+  t.equal(overview.children.length, 1)
+
+  const child0 = overview.children[0]
+  t.ok(child0.source)
+  t.match(child0.source.fileName, /test\/sources\/module\.mjs$/)
+})
+
+t.test('register promise of module namespace object', async t => {
+  let out
+  const logger = {
+    debug: (msg) => {},
+    info: (msg) => {},
+    error: (msg) => {},
+    fatal: (msg) => {},
+    warn: (msg) => { out += msg },
+    trace: (msg) => {},
+    child: () => logger
+  }
+
+  const app = Fastify({ logger })
+
+  await app.register(fastifyOverview)
+
+  app.register(import('./sources/module.mjs'))
+
+  await app.ready()
+
+ t.match(out, /Promise like plugin/)
+})

test/sources/module.mjs

@@ -0,0 +1,3 @@
+export default function(app, opts, done) {
+  done()
+}