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

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

#include "cmExportBuildCMakeConfigGenerator.h"

#include <cstddef>

#include <functional>

#include <map>

#include <ostream>

#include <set>

#include <utility>

#include <vector>

#include "cmCryptoHash.h"

#include "cmDiagnosticContext.h"

#include "cmExportSet.h"

#include "cmGenExContext.h"

#include "cmGeneratedFileStream.h"

#include "cmGeneratorExpression.h"

#include "cmGeneratorFileSet.h"

#include "cmGeneratorTarget.h"

#include "cmLocalGenerator.h"

#include "cmMakefile.h"

#include "cmOutputConverter.h"

#include "cmStringAlgorithms.h"

#include "cmSystemTools.h"

#include "cmTarget.h"

#include "cmTargetTypes.h"

cmExportBuildCMakeConfigGenerator::cmExportBuildCMakeConfigGenerator(

  cmDiagnosticContext context)

  : cmExportBuildFileGenerator(std::move(context))

{

  this->LG = nullptr;

  this->ExportSet = nullptr;

}

Unexecuted instantiation: cmExportBuildCMakeConfigGenerator::cmExportBuildCMakeConfigGenerator(cmDiagnosticContext)

Unexecuted instantiation: cmExportBuildCMakeConfigGenerator::cmExportBuildCMakeConfigGenerator(cmDiagnosticContext)

bool cmExportBuildCMakeConfigGenerator::GenerateMainFile(std::ostream& os)

{

  {

    std::string expectedTargets;

    std::string sep;

    bool generatedInterfaceRequired = false;

    auto visitor = [&](cmGeneratorTarget const* te) {

      expectedTargets = cmStrCat(std::move(expectedTargets), sep,

                                 this->Namespace, te->GetExportName());

      sep = " ";

      generatedInterfaceRequired |=

        this->GetExportTargetType(te) == cm::TargetType::INTERFACE_LIBRARY;

    };

    if (!this->CollectExports(visitor)) {

      return false;

    }

    if (generatedInterfaceRequired) {

      this->SetRequiredCMakeVersion(3, 0, 0);

    }

    this->GenerateExpectedTargetsCode(os, expectedTargets);

  }

  // Create all the imported targets.

  for (auto const& exp : this->Exports) {

    cmGeneratorTarget* gte = exp.Target;

    this->GenerateImportTargetCode(os, gte, this->GetExportTargetType(gte));

    gte->Target->AppendBuildInterfaceIncludes();

    ImportPropertyMap properties;

    if (!this->PopulateInterfaceProperties(gte, properties)) {

      return false;

    }

    ImportFileSetPropertyMap fsProperties;

    if (!this->PopulateFileSetInterfaceProperties(gte, fsProperties)) {

      return false;

    }

    this->PopulateInterfaceLinkLibrariesProperty(

      gte, cmGeneratorExpression::BuildInterface, properties);

    this->GenerateInterfaceProperties(gte, os, properties);

    this->GenerateTargetFileSets(gte, os, fsProperties);

  }

  std::string cxx_modules_name;

  if (this->ExportSet) {

    cxx_modules_name = this->ExportSet->GetName();

  } else {

    cmCryptoHash hasher(cmCryptoHash::AlgoSHA3_512);

    constexpr std::size_t HASH_TRUNCATION = 12;

    for (auto const& target : this->Targets) {

      hasher.Append(target.Name);

    }

    cxx_modules_name = hasher.FinalizeHex().substr(0, HASH_TRUNCATION);

  }

  this->GenerateCxxModuleInformation(cxx_modules_name, os);

  // Generate import file content for each configuration.

  for (std::string const& c : this->Configurations) {

    this->GenerateImportConfig(os, c);

  }

  // Generate import file content for each configuration.

  for (std::string const& c : this->Configurations) {

    this->GenerateImportCxxModuleConfigTargetInclusion(cxx_modules_name, c);

  }

  this->GenerateMissingTargetsCheckCode(os);

  return true;

}

void cmExportBuildCMakeConfigGenerator::GenerateImportTargetsConfig(

  std::ostream& os, std::string const& config, std::string const& suffix)

{

  for (auto const& exp : this->Exports) {

    cmGeneratorTarget* target = exp.Target;

    // Collect import properties for this target.

    ImportPropertyMap properties;

    if (this->GetExportTargetType(target) !=

        cm::TargetType::INTERFACE_LIBRARY) {

      this->SetImportLocationProperty(config, suffix, target, properties);

    }

    if (!properties.empty()) {

      // Get the rest of the target details.

      if (this->GetExportTargetType(target) !=

          cm::TargetType::INTERFACE_LIBRARY) {

        this->SetImportDetailProperties(config, suffix, target, properties);

        this->SetImportLinkInterface(config, suffix,

                                     cmGeneratorExpression::BuildInterface,

                                     target, properties);

      }

      // TODO: PUBLIC_HEADER_LOCATION

      // This should wait until the build feature propagation stuff

      // is done.  Then this can be a propagated include directory.

      // this->GenerateImportProperty(config, te->HeaderGenerator,

      //                              properties);

      // Generate code in the export file.

      std::string importedXcFrameworkLocation = exp.XcFrameworkLocation;

      if (!importedXcFrameworkLocation.empty()) {

        importedXcFrameworkLocation = cmGeneratorExpression::Preprocess(

          importedXcFrameworkLocation,

          cmGeneratorExpression::PreprocessContext::BuildInterface);

        importedXcFrameworkLocation = cmGeneratorExpression::Evaluate(

          importedXcFrameworkLocation, exp.Target->GetLocalGenerator(), config,

          exp.Target, nullptr, exp.Target);

        if (!importedXcFrameworkLocation.empty() &&

            !cmSystemTools::FileIsFullPath(importedXcFrameworkLocation)) {

          importedXcFrameworkLocation =

            cmStrCat(this->LG->GetCurrentBinaryDirectory(), '/',

                     std::move(importedXcFrameworkLocation));

        }

      }

      this->GenerateImportPropertyCode(os, config, suffix, target, properties,

                                       importedXcFrameworkLocation);

    }

  }

}

std::string cmExportBuildCMakeConfigGenerator::GetFileSetDirectories(

  cmGeneratorTarget* gte, cmGeneratorFileSet const* fileSet,

  cmTargetExport const* /*te*/)

{

  std::vector<std::string> resultVector;

  auto configs =

    gte->Makefile->GetGeneratorConfigs(cmMakefile::IncludeEmptyConfig);

  for (auto const& config : configs) {

    cm::GenEx::Context context(gte->LocalGenerator, config);

    auto directories = fileSet->GetDirectories(context, gte);

    bool const contextSensitive = directories.second;

    for (auto const& directory : directories.first) {

      auto dest = cmOutputConverter::EscapeForCMake(

        directory, cmOutputConverter::WrapQuotes::NoWrap);

      if (contextSensitive && configs.size() != 1) {

        resultVector.push_back(

          cmStrCat("\"$<$<CONFIG:", config, ">:", dest, ">\""));

      } else {

        resultVector.emplace_back(cmStrCat('"', dest, '"'));

      }

    }

  }

  return cmJoin(resultVector, " ");

}

std::string cmExportBuildCMakeConfigGenerator::GetFileSetFiles(

  cmGeneratorTarget* gte, cmGeneratorFileSet const* fileSet,

  cmTargetExport const* /*te*/)

{

  std::vector<std::string> resultVector;

  auto configs =

    gte->Makefile->GetGeneratorConfigs(cmMakefile::IncludeEmptyConfig);

  for (auto const& config : configs) {

    cm::GenEx::Context context(gte->LocalGenerator, config);

    auto files = fileSet->GetFiles(context, gte);

    bool const contextSensitive = files.second;

    for (auto const& it : files.first) {

      for (auto const& filename : it.second) {

        auto escapedFile = cmOutputConverter::EscapeForCMake(

          filename, cmOutputConverter::WrapQuotes::NoWrap);

        if (contextSensitive && configs.size() != 1) {

          resultVector.push_back(

            cmStrCat("\"$<$<CONFIG:", config, ">:", escapedFile, ">\""));

        } else {

          resultVector.emplace_back(cmStrCat('"', escapedFile, '"'));

        }

      }

    }

    if (!(contextSensitive && configs.size() != 1)) {

      break;

    }

  }

  return cmJoin(resultVector, " ");

}

void cmExportBuildCMakeConfigGenerator::GenerateCxxModuleConfigInformation(

  std::string const& name, std::ostream& os) const

{

  char const* opt = "";

  if (this->Configurations.size() > 1) {

    // With more than one configuration, each individual file is optional.

    opt = " OPTIONAL";

  }

  // Generate import file content for each configuration.

  for (std::string c : this->Configurations) {

    if (c.empty()) {

      c = "noconfig";

    }

    os << "include(\"${CMAKE_CURRENT_LIST_DIR}/cxx-modules-" << name << '-'

       << c << ".cmake\"" << opt << ")\n";

  }

}

bool cmExportBuildCMakeConfigGenerator::

  GenerateImportCxxModuleConfigTargetInclusion(std::string const& name,

                                               std::string config) const

{

  auto cxx_modules_dirname = this->GetCxxModulesDirectory();

  if (cxx_modules_dirname.empty()) {

    return true;

  }

  if (config.empty()) {

    config = "noconfig";

  }

  std::string fileName =

    cmStrCat(this->FileDir, '/', cxx_modules_dirname, "/cxx-modules-", name,

             '-', config, ".cmake");

  cmGeneratedFileStream os(fileName, true);

  if (!os) {

    std::string se = cmSystemTools::GetLastSystemError();

    cmSystemTools::Error(

      cmStrCat("cannot write to file \"", fileName, "\": ", se));

    return false;

  }

  os.SetCopyIfDifferent(true);

  for (auto const* tgt : this->ExportedTargets) {

    // Only targets with C++ module sources will have a

    // collator-generated install script.

    if (!tgt->HaveCxx20ModuleSources()) {

      continue;

    }

    os << "include(\"${CMAKE_CURRENT_LIST_DIR}/target-"

       << tgt->GetFilesystemExportName() << '-' << config << ".cmake\")\n";

  }

  return true;

}