Method fileExists

packages/compiler-cli/src/ngtsc/core/src/host.ts:323–335

(fileName: string)

  }

  fileExists(fileName: string): boolean {
    // Consider the file as existing whenever
    //  1) it really does exist in the delegate host, or
    //  2) at least one of the shim generators recognizes it
    // Note that we can pass the file name as branded absolute fs path because TypeScript
    // internally only passes POSIX-like paths.
    //
    // Also note that the `maybeGenerate` check below checks for both `null` and `undefined`.
    return (
      this.delegate.fileExists(fileName) ||
      this.shimAdapter.maybeGenerate(resolve(fileName)) != null
    );
  }

  get unifiedModulesHost(): UnifiedModulesHost | null {
    return this.fileNameToModuleName !== undefined ? (this as UnifiedModulesHost) : null;