fixup! feat(@angular/build): add library builder

Author: alan-agius4

packages/angular/build/src/builders/library/builder.ts

@@ -12,22 +12,22 @@ import assert from 'node:assert';
 import fs from 'node:fs/promises';
 import { createRequire } from 'node:module';
 import type ts from 'typescript';
-import { logCumulativeDurations } from '../../tools/esbuild/profiling';
 import {
   resetSassWorkerPoolCaches,
   shutdownSassWorkerPool,
 } from '../../tools/esbuild/stylesheets/sass-language';
 import { transformSupportedBrowsersToTargets } from '../../tools/esbuild/target';
 import { withNoProgress, withSpinner } from '../../tools/esbuild/utils';
-import type { BuildWatcher } from '../../tools/esbuild/watcher';
 import { deleteOutputDir } from '../../utils/delete-output-dir';
 import { maxWorkers } from '../../utils/environment-options';
 import { assertIsError } from '../../utils/error';
 import { initializeHash } from '../../utils/hash';
 import { toPosixPath } from '../../utils/path';
+import { logCumulativeDurations } from '../../utils/profiling';
 import { purgeStaleBuildCache } from '../../utils/purge-cache';
 import { getSupportedBrowsers } from '../../utils/supported-browsers';
 import { assertCompatibleAngularVersion } from '../../utils/version';
+import type { BuildWatcher } from '../../utils/watcher';
 import { WorkerPool } from '../../utils/worker-pool';
 import {
   type NormalizedLibraryOptions,
@@ -156,7 +156,7 @@ export async function* executeLibraryBuilder(
         logger.info('Watch mode enabled. Watching for file changes...');
       }
 
-      const { setupWatcher } = await import('../../tools/esbuild/watcher');
+      const { setupWatcher } = await import('../../utils/watcher');
       watcher = await setupWatcher({
         workspaceRoot,
         projectRoot,

packages/angular/build/src/builders/library/pipeline/compilation.ts

@@ -145,7 +145,7 @@ export async function compileEntryPoint(
     compilationInstance.updateLibraryOptions({ upstreamDtsPaths, upstreamDtsFiles });
   }
 
-  let stylesheetReferencedFiles: string[] = [];
+  const stylesheetReferencedFiles: string[] = [];
   const stylesheetWarnings: PartialMessage[] = [];
   const hostOptions: AngularHostOptions = {
     modifiedFiles,
@@ -166,7 +166,7 @@ export async function compileEntryPoint(
       }
 
       if (bundleReferencedFiles?.size) {
-        stylesheetReferencedFiles = [...bundleReferencedFiles];
+        stylesheetReferencedFiles.push(...bundleReferencedFiles);
       }
 
       if (bundleErrors?.length) {
@@ -208,7 +208,9 @@ export async function compileEntryPoint(
       kind: 'warning',
       color: colors,
     });
-    formattedWarnings = [...(formattedWarnings ?? []), ...formattedStyleWarnings];
+
+    formattedWarnings ??= [];
+    formattedWarnings.push(...formattedStyleWarnings);
   }
 
   const emittedFiles = compilationInstance.emitAffectedFiles();