fix: unable to read configuration providers

README.md

@@ -72,6 +72,7 @@ Import `ConfigModule` in your `AppModule`:
 // app.module.ts
 import { Module } from "@nestjs/common";
 import { ConfigModule } from "@buka/nestjs-config";
+import { AppConfig } from './app.config'
 
 @Module({
   // use process.env and read .env by defaulted
@@ -84,8 +85,6 @@ import { ConfigModule } from "@buka/nestjs-config";
 export class AppModule {}
 ```
 
-> `ConfigModule` automatically loads all classes with the `@Configuration` decorator.
-
 Inject and use `AppConfig` in your service:
 
 ```typescript

src/decorators/configuration.decorator.ts

@@ -3,7 +3,9 @@ import { CONFIGURATION_OBJECTS_METADATA_KEY, CONFIGURATION_OBJECT_PATH_METADATA_
 
 
 export function Configuration(path?: string): ClassDecorator {
+  console.log('🚀 ~ Configuration ~ path:', path)
   return (target) => {
+    console.log('🚀 ~ return ~ target:', target)
     Reflect.defineMetadata(CONFIGURATION_OBJECT_PATH_METADATA_KEY, path, target)
 
     const configurations = Reflect.getMetadata(CONFIGURATION_OBJECTS_METADATA_KEY, ConfigModule) || []

src/interfaces/config-module-options.interface.ts

@@ -1,3 +1,9 @@
+/**
+ * ConfigModuleOptions['providers] field doesn't seem to have any practical effect.
+ * In fact, it ensures that the classes decorated by @Configuration() can be loaded before the ConfigModule.register().
+ * Further ensures that ConfigModule can read all classes decorated by @Configuration() from Reflect.
+ */
+import { Type } from '@nestjs/common'
 import { ConfigLoader } from './config-loader.interface.js'
 
 export interface ConfigModuleOptions {
@@ -6,5 +12,7 @@ export interface ConfigModuleOptions {
    */
   config?: (string | ConfigLoader)[]
 
+  providers: Type[]
+
   suppressWarnings?: true
 }