refactor(@angular-devkit/build-angular): move SourceFileCache into dedicated file

This is to reduce the code in `compiler-plugin.ts`

Author: alan-agius4

packages/angular_devkit/build_angular/src/builders/application/execute-build.ts

@@ -8,7 +8,7 @@
 
 import { BuilderContext } from '@angular-devkit/architect';
 import assert from 'node:assert';
-import { SourceFileCache } from '../../tools/esbuild/angular/compiler-plugin';
+import { SourceFileCache } from '../../tools/esbuild/angular/source-file-cache';
 import {
   createBrowserCodeBundleOptions,
   createServerCodeBundleOptions,

packages/angular_devkit/build_angular/src/tools/esbuild/angular/compiler-plugin.ts

@@ -16,13 +16,12 @@ import type {
 } from 'esbuild';
 import assert from 'node:assert';
 import { realpath } from 'node:fs/promises';
-import { platform } from 'node:os';
 import * as path from 'node:path';
 import { pathToFileURL } from 'node:url';
 import ts from 'typescript';
 import { maxWorkers } from '../../../utils/environment-options';
 import { JavaScriptTransformer } from '../javascript-transformer';
-import { LoadResultCache, MemoryLoadResultCache } from '../load-result-cache';
+import { LoadResultCache } from '../load-result-cache';
 import {
   logCumulativeDurations,
   profileAsync,
@@ -33,39 +32,7 @@ import { BundleStylesheetOptions, bundleComponentStylesheet } from '../styleshee
 import { AngularHostOptions } from './angular-host';
 import { AngularCompilation, AotCompilation, JitCompilation, NoopCompilation } from './compilation';
 import { setupJitPluginCallbacks } from './jit-plugin-callbacks';
-
-const USING_WINDOWS = platform() === 'win32';
-const WINDOWS_SEP_REGEXP = new RegExp(`\\${path.win32.sep}`, 'g');
-
-export class SourceFileCache extends Map<string, ts.SourceFile> {
-  readonly modifiedFiles = new Set<string>();
-  readonly babelFileCache = new Map<string, Uint8Array>();
-  readonly typeScriptFileCache = new Map<string, string | Uint8Array>();
-  readonly loadResultCache = new MemoryLoadResultCache();
-
-  referencedFiles?: readonly string[];
-
-  constructor(readonly persistentCachePath?: string) {
-    super();
-  }
-
-  invalidate(files: Iterable<string>): void {
-    this.modifiedFiles.clear();
-    for (let file of files) {
-      this.babelFileCache.delete(file);
-      this.typeScriptFileCache.delete(pathToFileURL(file).href);
-      this.loadResultCache.invalidate(file);
-
-      // Normalize separators to allow matching TypeScript Host paths
-      if (USING_WINDOWS) {
-        file = file.replace(WINDOWS_SEP_REGEXP, path.posix.sep);
-      }
-
-      this.delete(file);
-      this.modifiedFiles.add(file);
-    }
-  }
-}
+import { SourceFileCache } from './source-file-cache';
 
 export interface CompilerPluginOptions {
   sourcemap: boolean;

packages/angular_devkit/build_angular/src/tools/esbuild/angular/source-file-cache.ts

@@ -0,0 +1,46 @@
+/**
+ * @license
+ * Copyright Google LLC All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+import { platform } from 'node:os';
+import * as path from 'node:path';
+import { pathToFileURL } from 'node:url';
+import ts from 'typescript';
+import { MemoryLoadResultCache } from '../load-result-cache';
+
+const USING_WINDOWS = platform() === 'win32';
+const WINDOWS_SEP_REGEXP = new RegExp(`\\${path.win32.sep}`, 'g');
+
+export class SourceFileCache extends Map<string, ts.SourceFile> {
+  readonly modifiedFiles = new Set<string>();
+  readonly babelFileCache = new Map<string, Uint8Array>();
+  readonly typeScriptFileCache = new Map<string, string | Uint8Array>();
+  readonly loadResultCache = new MemoryLoadResultCache();
+
+  referencedFiles?: readonly string[];
+
+  constructor(readonly persistentCachePath?: string) {
+    super();
+  }
+
+  invalidate(files: Iterable<string>): void {
+    this.modifiedFiles.clear();
+    for (let file of files) {
+      this.babelFileCache.delete(file);
+      this.typeScriptFileCache.delete(pathToFileURL(file).href);
+      this.loadResultCache.invalidate(file);
+
+      // Normalize separators to allow matching TypeScript Host paths
+      if (USING_WINDOWS) {
+        file = file.replace(WINDOWS_SEP_REGEXP, path.posix.sep);
+      }
+
+      this.delete(file);
+      this.modifiedFiles.add(file);
+    }
+  }
+}

packages/angular_devkit/build_angular/src/tools/esbuild/application-code-bundle.ts

@@ -13,7 +13,8 @@ import { readFile } from 'node:fs/promises';
 import { extname, join, relative } from 'node:path';
 import type { NormalizedApplicationBuildOptions } from '../../builders/application/options';
 import { allowMangle } from '../../utils/environment-options';
-import { SourceFileCache, createCompilerPlugin } from './angular/compiler-plugin';
+import { createCompilerPlugin } from './angular/compiler-plugin';
+import { SourceFileCache } from './angular/source-file-cache';
 import { createCompilerPluginOptions } from './compiler-plugin-options';
 import { createAngularLocaleDataPlugin } from './i18n-locale-plugin';
 import { createRxjsEsmResolutionPlugin } from './rxjs-esm-resolution-plugin';

packages/angular_devkit/build_angular/src/tools/esbuild/bundler-execution-result.ts

@@ -7,7 +7,7 @@
  */
 
 import type { ChangedFiles } from '../../tools/esbuild/watcher';
-import type { SourceFileCache } from './angular/compiler-plugin';
+import type { SourceFileCache } from './angular/source-file-cache';
 import type { BuildOutputFile, BuildOutputFileType, BundlerContext } from './bundler-context';
 import { createOutputFileFromText } from './utils';
 

packages/angular_devkit/build_angular/src/tools/esbuild/compiler-plugin-options.ts

@@ -7,7 +7,8 @@
  */
 
 import { NormalizedApplicationBuildOptions } from '../../builders/application/options';
-import type { SourceFileCache, createCompilerPlugin } from './angular/compiler-plugin';
+import type { createCompilerPlugin } from './angular/compiler-plugin';
+import type { SourceFileCache } from './angular/source-file-cache';
 
 type CreateCompilerPluginParameters = Parameters<typeof createCompilerPlugin>;