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

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

#include "cmExperimental.h"

#include <cassert>

#include <cstddef>

#include <string>

#include "cmGlobalGenerator.h"

#include "cmMakefile.h"

#include "cmMessageType.h"

#include "cmStringAlgorithms.h"

#include "cmValue.h"

namespace {

/*

 * The `Uuid` fields of these objects should change periodically.

 * Search for other instances to keep the documentation and test suite

 * up-to-date.

 */

cmExperimental::FeatureData const LookupTable[] = {

  // ExportPackageDependencies

  { "ExportPackageDependencies",

    "1942b4fa-b2c5-4546-9385-83f254070067",

    "CMAKE_EXPERIMENTAL_EXPORT_PACKAGE_DEPENDENCIES",

    "CMake's EXPORT_PACKAGE_DEPENDENCIES support is experimental. It is meant "

    "only for experimentation and feedback to CMake developers.",

    {},

    cmExperimental::TryCompileCondition::Always },

  // CxxImportStd

  { "CxxImportStd",

    "451f2fe2-a8a2-47c3-bc32-94786d8fc91b",

    "CMAKE_EXPERIMENTAL_CXX_IMPORT_STD",

    "CMake's support for `import std;` in C++23 and newer is experimental. It "

    "is meant only for experimentation and feedback to CMake developers.",

    {},

    cmExperimental::TryCompileCondition::Always },

  // MappedPackageInfo

  { "MappedPackageInfo",

    "ababa1b5-7099-495f-a9cd-e22d38f274f2",

    "CMAKE_EXPERIMENTAL_MAPPED_PACKAGE_INFO",

    "CMake's support for generating package information in the Common Package "

    "Specification format from CMake script exports is experimental. It is "

    "meant only for experimentation and feedback to CMake developers.",

    {},

    cmExperimental::TryCompileCondition::Always },

  // ExportBuildDatabase

  { "ExportBuildDatabase",

    "73194a1d-c0b5-41b9-9190-a4512925e192",

    "CMAKE_EXPERIMENTAL_EXPORT_BUILD_DATABASE",

    "CMake's support for exporting build databases is experimental. It is "

    "meant only for experimentation and feedback to CMake developers.",

    {},

    cmExperimental::TryCompileCondition::Never },

  { "GenerateSbom",

    "ca494ed3-b261-4205-a01f-603c95e4cae0",

    "CMAKE_EXPERIMENTAL_GENERATE_SBOM",

    "CMake's support for generating software bill of materials (Sbom) "

    "information in SPDX format is experimental. It is meant only for "

    "experimentation and feedback to CMake developers.",

    {},

    cmExperimental::TryCompileCondition::Never },

  // Rust support

  { "Rust",

    "3cc9b32c-47d3-4056-8953-d74e69fc0d6c",

    "CMAKE_EXPERIMENTAL_RUST",

    "CMake's support for the Rust programming language is experimental. "

    "It is meant only for experimentation and feedback to CMake developers.",

    {},

    cmExperimental::TryCompileCondition::Never },

};

static_assert(sizeof(LookupTable) / sizeof(LookupTable[0]) ==

                static_cast<size_t>(cmExperimental::Feature::Sentinel),

              "Experimental feature lookup table mismatch");

cmExperimental::FeatureData const& DataForFeature(cmExperimental::Feature f)

{

  assert(f != cmExperimental::Feature::Sentinel);

  return LookupTable[static_cast<size_t>(f)];

}

}

cmExperimental::FeatureData const& cmExperimental::DataForFeature(Feature f)

{

  return ::DataForFeature(f);

}

cm::optional<cmExperimental::Feature> cmExperimental::FeatureByName(

  std::string const& name)

{

  size_t idx = 0;

  for (auto const& feature : LookupTable) {

    if (feature.Name == name) {

      return static_cast<Feature>(idx);

    }

    ++idx;

  }

  return {};

}

bool cmExperimental::HasSupportEnabled(cmMakefile const& mf, Feature f)

{

  bool enabled = false;

  FeatureData const& data = cmExperimental::DataForFeature(f);

  if (cmValue value = mf.GetDefinition(data.Variable)) {

    enabled = *value == data.Uuid;

    if (mf.GetGlobalGenerator()->ShouldWarnExperimental(data.Name, *value)) {

      if (enabled) {

        mf.IssueMessage(MessageType::AUTHOR_WARNING, data.Description);

      } else {

        mf.IssueMessage(

          MessageType::AUTHOR_WARNING,

          cmStrCat(

            data.Variable, " is set to incorrect value\n  ", value,

            "\n"

            "See 'Help/dev/experimental.rst' in the source tree of this "

            "version of CMake for documentation of the experimental feature "

            "and the corresponding activation value.  This project's code "

            "may require changes to work with this CMake's version of the "

            "feature."));

      }

    }

  }

  return enabled;

}