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

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

#include "cmNinjaUtilityTargetGenerator.h"

#include <algorithm>

#include <array>

#include <iterator>

#include <memory>

#include <set>

#include <string>

#include <utility>

#include <vector>

#include "cmCustomCommand.h"

#include "cmCustomCommandGenerator.h"

#include "cmGeneratedFileStream.h"

#include "cmGeneratorExpression.h"

#include "cmGeneratorTarget.h"

#include "cmGlobalNinjaGenerator.h"

#include "cmLocalNinjaGenerator.h"

#include "cmNinjaTypes.h"

#include "cmOutputConverter.h"

#include "cmSourceFile.h"

#include "cmStateTypes.h"

#include "cmStringAlgorithms.h"

#include "cmSystemTools.h"

#include "cmTarget.h"

#include "cmValue.h"

cmNinjaUtilityTargetGenerator::cmNinjaUtilityTargetGenerator(

  cmGeneratorTarget* target)

  : cmNinjaTargetGenerator(target)

{

}

cmNinjaUtilityTargetGenerator::~cmNinjaUtilityTargetGenerator() = default;

void cmNinjaUtilityTargetGenerator::Generate(std::string const& config)

{

  if (!this->GetGeneratorTarget()->Target->IsPerConfig()) {

    this->WriteUtilBuildStatements(config, config);

    return;

  }

  for (auto const& fileConfig : this->GetConfigNames()) {

    if (!this->GetGlobalGenerator()

           ->GetCrossConfigs(fileConfig)

           .count(config)) {

      continue;

    }

    if (fileConfig != config &&

        this->GetGeneratorTarget()->GetType() == cmStateEnums::GLOBAL_TARGET) {

      continue;

    }

    this->WriteUtilBuildStatements(config, fileConfig);

  }

}

void cmNinjaUtilityTargetGenerator::WriteUtilBuildStatements(

  std::string const& config, std::string const& fileConfig)

{

  cmGlobalNinjaGenerator* gg = this->GetGlobalGenerator();

  cmLocalNinjaGenerator* lg = this->GetLocalGenerator();

  cmGeneratorTarget* genTarget = this->GetGeneratorTarget();

  std::string configDir;

  if (genTarget->Target->IsPerConfig()) {

    configDir = gg->ConfigDirectory(fileConfig);

  }

  std::string utilCommandName =

    cmStrCat(lg->GetCurrentBinaryDirectory(), "/CMakeFiles", configDir, '/',

             this->GetTargetName(), ".util");

  utilCommandName = this->ConvertToNinjaPath(utilCommandName);

  cmNinjaBuild phonyBuild("phony");

  std::vector<std::string> commands;

  cmNinjaDeps deps;

  cmGlobalNinjaGenerator::CCOutputs util_outputs(gg);

  util_outputs.ExplicitOuts.emplace_back(utilCommandName);

  std::string commandDesc;

  cmGeneratorExpression ge(*this->GetLocalGenerator()->GetCMakeInstance());

  bool uses_terminal = false;

  {

    std::array<std::vector<cmCustomCommand> const*, 2> const cmdLists = {

      { &genTarget->GetPreBuildCommands(), &genTarget->GetPostBuildCommands() }

    };

    for (std::vector<cmCustomCommand> const* cmdList : cmdLists) {

      for (cmCustomCommand const& ci : *cmdList) {

        cmCustomCommandGenerator ccg(ci, fileConfig, lg);

        lg->AppendCustomCommandDeps(ccg, deps, fileConfig);

        lg->AppendCustomCommandLines(ccg, commands);

        if (ci.GetComment()) {

          if (!commandDesc.empty()) {

            commandDesc += "; ";

          }

          auto cge = ge.Parse(ci.GetComment());

          commandDesc += cge->Evaluate(this->GetLocalGenerator(), config);

        }

        util_outputs.Add(ccg.GetByproducts());

        if (ci.GetUsesTerminal()) {

          uses_terminal = true;

        }

      }

    }

  }

  {

    std::vector<cmSourceFile*> sources;

    genTarget->GetSourceFiles(sources, config);

    for (cmSourceFile const* source : sources) {

      if (cmCustomCommand const* cc = source->GetCustomCommand()) {

        cmCustomCommandGenerator ccg(*cc, config, lg);

        lg->AddCustomCommandTarget(cc, genTarget);

        // Depend on all custom command outputs.

        std::vector<std::string> const& ccOutputs = ccg.GetOutputs();

        std::vector<std::string> const& ccByproducts = ccg.GetByproducts();

        std::transform(ccOutputs.begin(), ccOutputs.end(),

                       std::back_inserter(deps), this->MapToNinjaPath());

        std::transform(ccByproducts.begin(), ccByproducts.end(),

                       std::back_inserter(deps), this->MapToNinjaPath());

      }

    }

  }

  std::string outputConfig;

  if (genTarget->Target->IsPerConfig()) {

    outputConfig = config;

  }

  lg->AppendTargetOutputs(genTarget, phonyBuild.Outputs, outputConfig);

  if (genTarget->Target->GetType() != cmStateEnums::GLOBAL_TARGET) {

    lg->AppendTargetOutputs(genTarget, gg->GetByproductsForCleanTarget(),

                            config);

    std::copy(util_outputs.ExplicitOuts.begin(),

              util_outputs.ExplicitOuts.end(),

              std::back_inserter(gg->GetByproductsForCleanTarget()));

  }

  lg->AppendTargetDepends(genTarget, deps, config, fileConfig,

                          DependOnTargetArtifact);

  if (commands.empty()) {

    phonyBuild.Comment = "Utility command for " + this->GetTargetName();

    phonyBuild.ExplicitDeps = std::move(deps);

    if (genTarget->GetType() != cmStateEnums::GLOBAL_TARGET) {

      gg->WriteBuild(this->GetImplFileStream(fileConfig), phonyBuild);

    } else {

      gg->WriteBuild(this->GetCommonFileStream(), phonyBuild);

    }

  } else {

    std::string command = lg->BuildCommandLine(

      commands, config, fileConfig, "utility", this->GeneratorTarget);

    std::string desc;

    cmValue echoStr = genTarget->GetProperty("EchoString");

    if (echoStr) {

      desc = *echoStr;

    } else if (!commandDesc.empty()) {

      desc = commandDesc;

    } else {

      desc = "Running utility command for " + this->GetTargetName();

    }

    // TODO: fix problematic global targets.  For now, search and replace the

    // makefile vars.

    cmSystemTools::ReplaceString(

      command, "$(CMAKE_SOURCE_DIR)",

      lg->ConvertToOutputFormat(lg->GetSourceDirectory(),

                                cmOutputConverter::SHELL));

    cmSystemTools::ReplaceString(

      command, "$(CMAKE_BINARY_DIR)",

      lg->ConvertToOutputFormat(lg->GetBinaryDirectory(),

                                cmOutputConverter::SHELL));

    cmSystemTools::ReplaceString(command, "$(ARGS)", "");

    command = gg->ExpandCFGIntDir(command, config);

    std::string ccConfig;

    if (genTarget->Target->IsPerConfig() &&

        genTarget->GetType() != cmStateEnums::GLOBAL_TARGET) {

      ccConfig = config;

    }

    if (config == fileConfig ||

        gg->GetPerConfigUtilityTargets().count(genTarget->GetName())) {

      gg->WriteCustomCommandBuild(

        command, desc, "Utility command for " + this->GetTargetName(),

        /*depfile*/ "", /*job_pool*/ "", uses_terminal,

        /*restat*/ true, ccConfig, std::move(util_outputs), std::move(deps));

    }

    phonyBuild.ExplicitDeps.push_back(utilCommandName);

    if (genTarget->GetType() != cmStateEnums::GLOBAL_TARGET) {

      gg->WriteBuild(this->GetImplFileStream(fileConfig), phonyBuild);

    } else {

      gg->WriteBuild(this->GetCommonFileStream(), phonyBuild);

    }

  }

  // Find ADDITIONAL_CLEAN_FILES

  this->AdditionalCleanFiles(config);

  // Add an alias for the logical target name regardless of what directory

  // contains it.  Skip this for GLOBAL_TARGET because they are meant to

  // be per-directory and have one at the top-level anyway.

  if (genTarget->GetType() != cmStateEnums::GLOBAL_TARGET) {

    gg->AddTargetAlias(this->GetTargetName(), genTarget, config);

  }

}