feat: support --preserveWatchOutput for 'build' command

Author: micalevisk

actions/build.action.ts

@@ -186,7 +186,9 @@ export class BuildAction extends AbstractAction {
     watchMode: boolean,
     onSuccess: (() => void) | undefined,
   ) {
-    const { WebpackCompiler } = await import('../lib/compiler/webpack-compiler')
+    const { WebpackCompiler } = await import(
+      '../lib/compiler/webpack-compiler'
+    );
     const webpackCompiler = new WebpackCompiler(this.pluginsLoader);
 
     const webpackPath =

commands/build.command.ts

@@ -18,7 +18,11 @@ export class BuildCommand extends AbstractCommand {
       )
       .option('--type-check', 'Enable type checking (when SWC is used).')
       .option('--webpackPath [path]', 'Path to webpack configuration.')
-      .option('--tsc', 'Use tsc for compilation.')
+      .option('--tsc', 'Use typescript compiler for compilation.')
+      .option(
+        '--preserveWatchOutput',
+        'Use "preserveWatchOutput" option when using tsc watch mode.',
+      )
       .description('Build Nest application.')
       .action(async (app: string, command: Command) => {
         const options: Input[] = [];
@@ -67,6 +71,14 @@ export class BuildCommand extends AbstractCommand {
           value: command.typeCheck,
         });
 
+        options.push({
+          name: 'preserveWatchOutput',
+          value:
+            !!command.preserveWatchOutput &&
+            !!command.watch &&
+            !isWebpackEnabled,
+        });
+
         const inputs: Input[] = [];
         inputs.push({ name: 'app', value: app });
         await this.action.handle(inputs, options);

commands/start.command.ts

@@ -23,7 +23,7 @@ export class StartCommand extends AbstractCommand {
       )
       .option('--webpackPath [path]', 'Path to webpack configuration.')
       .option('--type-check', 'Enable type checking (when SWC is used).')
-      .option('--tsc', 'Use tsc for compilation.')
+      .option('--tsc', 'Use typescript compiler for compilation.')
       .option(
         '--sourceRoot [sourceRoot]',
         'Points at the root of the source code for the single project in standard mode structures, or the default project in monorepo mode structures.',
@@ -35,7 +35,7 @@ export class StartCommand extends AbstractCommand {
       .option('-e, --exec [binary]', 'Binary to run (default: "node").')
       .option(
         '--preserveWatchOutput',
-        'Use "preserveWatchOutput" option when tsc watch mode.',
+        'Use "preserveWatchOutput" option when using tsc watch mode.',
       )
       .description('Run Nest application.')
       .action(async (app: string, command: Command) => {

lib/schematics/abstract.collection.ts

@@ -3,7 +3,10 @@ import { Schematic } from './nest.collection';
 import { SchematicOption } from './schematic.option';
 
 export abstract class AbstractCollection {
-  constructor(protected collection: string, protected runner: AbstractRunner) {}
+  constructor(
+    protected collection: string,
+    protected runner: AbstractRunner,
+  ) {}
 
   public async execute(
     name: string,