Class WebpackResourceLoader

packages/ngtools/webpack/src/resource_loader.ts:29–381

}

export class WebpackResourceLoader {
  private _parentCompilation?: Compilation;
  private _fileDependencies = new Map<string, Set<string>>();
  private _reverseDependencies = new Map<string, Set<string>>();

  private fileCache?: Map<string, CompilationOutput>;
  private assetCache?: Map<string, Asset>;

  private modifiedResources = new Set<string>();
  private outputPathCounter = 1;

  private readonly inlineDataLoaderPath = InlineAngularResourceLoaderPath;

  constructor(shouldCache: boolean) {
    if (shouldCache) {
      this.fileCache = new Map();
      this.assetCache = new Map();
    }
  }

  update(parentCompilation: Compilation, changedFiles?: Iterable<string>): void {
    this._parentCompilation = parentCompilation;

    // Update resource cache and modified resources
    this.modifiedResources.clear();

    if (changedFiles) {
      for (const changedFile of changedFiles) {
        const changedFileNormalized = normalizePath(changedFile);
        this.assetCache?.delete(changedFileNormalized);

        for (const affectedResource of this.getAffectedResources(changedFile)) {
          const affectedResourceNormalized = normalizePath(affectedResource);
          this.fileCache?.delete(affectedResourceNormalized);
          this.modifiedResources.add(affectedResource);

          for (const effectedDependencies of this.getResourceDependencies(
            affectedResourceNormalized,
          )) {
            this.assetCache?.delete(normalizePath(effectedDependencies));
          }
        }
      }
    } else {
      this.fileCache?.clear();
      this.assetCache?.clear();
    }

    // Re-emit all assets for un-effected files
    if (this.assetCache) {
      for (const [, { name, source, info }] of this.assetCache) {
        this._parentCompilation.emitAsset(name, source, info);
      }
    }
  }

  clearParentCompilation(): void {
    this._parentCompilation = undefined;