Method getSourceFile

packages/compiler-cli/test/ngtsc/env.ts:434–448

(
    fileName: string,
    languageVersion: ts.ScriptTarget,
    onError?: (message: string) => void,
    shouldCreateNewSourceFile?: boolean,
  )

  private writtenFiles = new Set<string>();

  override getSourceFile(
    fileName: string,
    languageVersion: ts.ScriptTarget,
    onError?: (message: string) => void,
    shouldCreateNewSourceFile?: boolean,
  ): ts.SourceFile | undefined {
    if (this.cache.has(fileName)) {
      return this.cache.get(fileName)!;
    }
    const sf = super.getSourceFile(fileName, languageVersion);
    if (sf !== undefined) {
      this.cache.set(sf.fileName, sf);
    }
    return sf;
  }

  flushWrittenFileTracking(): void {
    this.writtenFiles.clear();