chore: update plugin sorting algorithm + update test

packages/nuxt/src/core/app.ts

@@ -126,31 +126,21 @@ async function resolveApp (nuxt: Nuxt, app: NuxtApp) {
   }
 
   // Re-initialise plugins
-  app.plugins = nuxt.options.plugins.map(normalizePlugin)
-
-  // Track scanned plugins separately so we can apply a sorting mechanism to them
-  const scannedPlugins: [string, NuxtPlugin][] = []
-  for (const config of nuxt.options._layers.map(layer => layer.config)) {
-    for (const plugin of config.plugins || []) {
-      app.plugins.push(normalizePlugin(plugin as NuxtPlugin | string))
-    }
-
-    if (config.srcDir) {
-      const pluginDir = join(config.srcDir, config.dir?.plugins || 'plugins')
-      for (const file of await resolveFiles(pluginDir, [
-        '*.{ts,js,mjs,cjs,mts,cts}',
-        '*/index.*{ts,js,mjs,cjs,mts,cts}' // TODO: remove, only scan top-level plugins #18418
-      ])) {
-        scannedPlugins.push([file.replace(pluginDir, ''), normalizePlugin(file)])
-      }
-    }
-  }
-
-  // Sort scanned plugins by their names so a scanned `01.plugin.ts` will always run before finished `02.plugin.ts`
-  // and append to the plugin array
-  for (const [_name, plugin] of scannedPlugins.sort(([a], [b]) => a.localeCompare(b))) {
-    app.plugins.push(plugin)
+  app.plugins = []
+  let idx = 0
+  // Sort Plugins: layers plugins first then project plugins
+  for (const config of nuxt.options._layers.map(layer => layer.config).reverse()) {
+    app.plugins[idx++ === (nuxt.options._layers.length - 1) ? 'push' : 'unshift'](...[
+      ...(config.plugins || []),
+      ...config.srcDir
+        ? await resolveFiles(config.srcDir, [
+          `${config.dir?.plugins || 'plugins'}/*.{ts,js,mjs,cjs,mts,cts}`,
+          `${config.dir?.plugins || 'plugins'}/*/index.*{ts,js,mjs,cjs,mts,cts}` // TODO: remove, only scan top-level plugins #18418
+        ])
+        : []
+    ].map(plugin => normalizePlugin(plugin as NuxtPlugin)))
   }
+  app.plugins.unshift(...nuxt.options.plugins.map(normalizePlugin))
 
   // Normalize and de-duplicate plugins and middleware
   app.middleware = uniqueBy(await resolvePaths(app.middleware, 'path'), 'name')

test/fixtures/basic/plugins/10.layer-ordering.ts

@@ -3,8 +3,8 @@ export default defineNuxtPlugin((nuxtApp) => {
     if (!nuxtApp.$layerPluginPre) {
       throw createError('layer plugin failed to run before end project plugin')
     }
-    if (nuxtApp.$layerPluginPost) {
-      throw createError('layer plugin failed to run after end project plugin')
+    if (!nuxtApp.$layerPluginPost) {
+      throw createError('layer plugin failed to run before end project plugin')
     }
   }
 })