How to use the @angular/compiler-cli.main function in @angular/compiler-cli

.map(f => join(path, f)));
    parsed.files = parsed.files.filter((f: string, i: number) => parsed.files.indexOf(f) === i);
    parsed.files.push(join(Config.BOOTSTRAP_DIR, 'main.web.ts'));
    return JSON.stringify(parsed, null, 2);
  });
  const args = argv;

  // If a translation, tell the compiler
  if (args.lang) {
    args['i18nFile'] = `./src/client/assets/locale/messages.${args.lang}.xlf`;
    args['locale'] = args.lang;
    args['i18nFormat'] = 'xlf';
  }

  const cliOptions = new NgcCliOptions(args);
  main(Config.TMP_DIR, cliOptions, codegen)
    .then(done)
    .catch(e => {
      console.error(e.stack);
      console.error('Compilation failed');
      process.exit(1);
    });
};

.filter(f => f.endsWith('d.ts'))
      .map(f => join(path, f)));
    parsed.files.push(join(Config.BOOTSTRAP_DIR, 'main.ts'));
    return JSON.stringify(parsed, null, 2);
  });
  const args = argv;

  // If a translation, tell the compiler
  if (args.lang) {
    args['i18nFile'] = `./src/client/assets/locale/messages.${args.lang}.xlf`;
    args['locale'] = args.lang;
    args['i18nFormat'] = 'xlf';
  }

  const cliOptions = new NgcCliOptions(args);
  main(Config.TMP_DIR, cliOptions, codegen)
    .then(done)
    .catch(e => {
      console.error(e.stack);
      console.error('Compilation failed');
      process.exit(1);
    });
};

.map(f => join(path, f)));
    parsed.files = parsed.files.filter((f: string, i: number) => parsed.files.indexOf(f) === i);
    parsed.files.push(join(Config.BOOTSTRAP_DIR, Config.BOOTSTRAP_PROD_MODULE+'.ts'));
    return JSON.stringify(parsed, null, 2);
  });
  const args = argv;

  // If a translation, tell the compiler
  if (args.lang) {
    args['i18nFile'] = `./src/client/assets/locale/messages.${args.lang}.xlf`;
    args['locale'] = args.lang;
    args['i18nFormat'] = 'xlf';
  }

  const cliOptions = new NgcCliOptions(args);
  main(Config.TMP_DIR, cliOptions, codegen)
    .then(done)
    .catch(e => {
      console.error(e.stack);
      console.error('Compilation failed');
      process.exit(1);
    });
};

.map(f => join(path, f)));
    parsed.files = parsed.files.filter((f: string, i: number) => parsed.files.indexOf(f) === i);
    parsed.files.push(join(Config.BOOTSTRAP_DIR, 'main.ts'));
    return JSON.stringify(parsed, null, 2);
  });
  const args = argv;

  // If a translation, tell the compiler
  if (args.lang) {
    args['i18nFile'] = `./src/client/assets/locale/messages.${args.lang}.xlf`;
    args['locale'] = args.lang;
    args['i18nFormat'] = 'xlf';
  }

  const cliOptions = new NgcCliOptions(args);
  main(Config.TMP_DIR, cliOptions, codegen)
    .then(done)
    .catch(e => {
      console.error(e.stack);
      console.error('Compilation failed');
      process.exit(1);
    });
};

return (done: DoneCallback) => {
        const cliOptions = new NgcCliOptions({});

        const tsOptions: ts.CompilerOptions = {
            ...extraCompilerOptions,
            target: target === 'es6' ? ts.ScriptTarget.ES2016 : ts.ScriptTarget.ES5,
            importHelpers: true
        };

        ngc(sourceDirectory, cliOptions, codegen, tsOptions)
            .then(done)
            .catch((error) => {
                (console).error(error.stack);
                (console).error('Compilation failed');
                process.exit(1);
            });
    };
}

export function runInternal(project: string, cliOptions: NgcCliOptions, webpack: WebpackWrapper): Promise {
  return tscWrappedMain(project, cliOptions, codeGenFactory(webpack))
    .then(() => webpack.emitOnCompilationSuccess())
    .catch(e => {
      webpack.emitOnCompilationError(e);
      throw e;
    });
}