/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying

   file LICENSE.rst or https://cmake.org/licensing for details.  */

#include "cmPlistParser.h"

#include <vector>

#include <cm3p/json/reader.h>

#include <cm3p/json/value.h>

#include "cmUVProcessChain.h"

#include "cmUVStream.h"

cm::optional<Json::Value> cmParsePlist(std::string const& filename)

{

  cmUVProcessChainBuilder builder;

  builder.AddCommand(

    { "/usr/bin/plutil", "-convert", "json", "-o", "-", filename });

  builder.SetBuiltinStream(cmUVProcessChainBuilder::Stream_OUTPUT);

  auto chain = builder.Start();

  chain.Wait();

  auto const& status = chain.GetStatus(0);

  if (status.ExitStatus != 0) {

    return cm::nullopt;

  }

  Json::Reader reader;

  Json::Value value;

  cmUVIStream outputStream(chain.OutputStream());

  if (!reader.parse(outputStream, value)) {

    return cm::nullopt;

  }

  return cm::optional<Json::Value>(value);

}