feat(webpack): add externals option for nest config

.changeset/great-mice-whisper.md

@@ -0,0 +1,5 @@
+---
+'@jpapini/webpack-config': minor
+---
+
+Adding `externals` option for nest config.

packages/webpack-config/src/configs/nest-app.config.ts

@@ -8,7 +8,7 @@ import type { Configuration } from 'webpack';
 import webpack from 'webpack';
 import nodeExternals from 'webpack-node-externals';
 
-import type { IWebpackEnv } from '~/types';
+import type { IExternalItem, IWebpackEnv } from '~/types';
 import { shorternPath } from '~/utils/find-root.util';
 import { mergeConfig } from '~/utils/merge-config.util';
 
@@ -22,6 +22,7 @@ export type ICreateNestAppWebpackConfigOptions = {
     entryFile?: string;
     outputDir?: string;
     outputFilename?: string;
+    externals?: IExternalItem[];
 };
 
 export function createNestAppWebpackConfig(
@@ -50,7 +51,7 @@ export function createNestAppWebpackConfig(
                 __filename: false,
             },
             externalsPresets: { node: true },
-            externals: [nodeExternals()],
+            externals: [nodeExternals(), ...(options.externals ?? [])],
             entry: [entryFile],
             output: {
                 path: outputDir,

packages/webpack-config/src/index.ts

@@ -1 +1,2 @@
 export * from './configs';
+export * from './utils/merge-config.util';

packages/webpack-config/src/types/external-item.type.ts

@@ -0,0 +1,6 @@
+import type { ExternalsPlugin } from 'webpack';
+
+// eslint-disable-next-line @typescript-eslint/naming-convention
+type GetArrayInnerType<T> = T extends (infer U)[] ? U : never;
+
+export type IExternalItem = GetArrayInnerType<ExternalsPlugin['externals']>;

packages/webpack-config/src/types/index.ts

@@ -1 +1,2 @@
+export * from './external-item.type';
 export * from './webpack-env.type';