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

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

#include "cmExtraEclipseCDT4Generator.h"

#include <algorithm>

#include <cassert>

#include <cstdio>

#include <map>

#include <memory>

#include <sstream>

#include <utility>

#include <cmext/string_view>

#include "cmsys/RegularExpression.hxx"

#include "cmGeneratedFileStream.h"

#include "cmGeneratorExpression.h"

#include "cmGeneratorTarget.h"

#include "cmGlobalGenerator.h"

#include "cmList.h"

#include "cmLocalGenerator.h"

#include "cmMakefile.h"

#include "cmMessageType.h"

#include "cmSourceFile.h"

#include "cmSourceGroup.h"

#include "cmState.h"

#include "cmStateTypes.h"

#include "cmStringAlgorithms.h"

#include "cmSystemTools.h"

#include "cmValue.h"

#include "cmXMLWriter.h"

#include "cmake.h"

static void AppendAttribute(cmXMLWriter& xml, char const* keyval)

{

  xml.StartElement("attribute");

  xml.Attribute("key", keyval);

  xml.Attribute("value", keyval);

  xml.EndElement();

}

template <typename T>

void AppendDictionary(cmXMLWriter& xml, char const* key, T const& value)

{

  xml.StartElement("dictionary");

  xml.Element("key", key);

  xml.Element("value", value);

  xml.EndElement();

}

Unexecuted instantiation: void AppendDictionary<char [6]>(cmXMLWriter&, char const*, char const (&) [6])

Unexecuted instantiation: void AppendDictionary<char [5]>(cmXMLWriter&, char const*, char const (&) [5])

Unexecuted instantiation: void AppendDictionary<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >(cmXMLWriter&, char const*, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)

Unexecuted instantiation: void AppendDictionary<char [47]>(cmXMLWriter&, char const*, char const (&) [47])

Unexecuted instantiation: void AppendDictionary<char [4]>(cmXMLWriter&, char const*, char const (&) [4])

Unexecuted instantiation: void AppendDictionary<char [1]>(cmXMLWriter&, char const*, char const (&) [1])

cmExtraEclipseCDT4Generator::cmExtraEclipseCDT4Generator()

{

  this->IsOutOfSourceBuild = false;

  this->GenerateSourceProject = false;

  this->SupportsVirtualFolders = true;

  this->GenerateLinkedResources = true;

  this->SupportsGmakeErrorParser = true;

  this->SupportsMachO64Parser = true;

  this->CEnabled = false;

  this->CXXEnabled = false;

}

cmExternalMakefileProjectGeneratorFactory*

cmExtraEclipseCDT4Generator::GetFactory()

{

  static cmExternalMakefileProjectGeneratorSimpleFactory<

    cmExtraEclipseCDT4Generator>

    factory("Eclipse CDT4",

            "Generates Eclipse CDT 4.0 project files (deprecated).");

  if (factory.GetSupportedGlobalGenerators().empty()) {

// TODO: Verify if __CYGWIN__ should be checked.

// #if defined(_WIN32) && !defined(__CYGWIN__)

#if defined(_WIN32)

    factory.AddSupportedGlobalGenerator("NMake Makefiles");

    factory.AddSupportedGlobalGenerator("MinGW Makefiles");

// factory.AddSupportedGlobalGenerator("MSYS Makefiles");

#endif

    factory.AddSupportedGlobalGenerator("Ninja");

    factory.AddSupportedGlobalGenerator("Unix Makefiles");

  }

  return &factory;

}

void cmExtraEclipseCDT4Generator::EnableLanguage(

  std::vector<std::string> const& languages, cmMakefile* /*unused*/,

  bool /*optional*/)

{

  for (std::string const& l : languages) {

    if (l == "CXX") {

      this->Natures.insert("org.eclipse.cdt.core.ccnature");

      this->Natures.insert("org.eclipse.cdt.core.cnature");

      this->CXXEnabled = true;

    } else if (l == "C") {

      this->Natures.insert("org.eclipse.cdt.core.cnature");

      this->CEnabled = true;

    } else if (l == "Java") {

      this->Natures.insert("org.eclipse.jdt.core.javanature");

    }

  }

}

void cmExtraEclipseCDT4Generator::Generate()

{

  auto const& lg = this->GlobalGenerator->GetLocalGenerators()[0];

  cmMakefile const* mf = lg->GetMakefile();

  std::string eclipseVersion = mf->GetSafeDefinition("CMAKE_ECLIPSE_VERSION");

  cmsys::RegularExpression regex(".*([0-9]+\\.[0-9]+).*");

  if (regex.find(eclipseVersion)) {

    unsigned int majorVersion = 0;

    unsigned int minorVersion = 0;

    int res =

      sscanf(regex.match(1).c_str(), "%u.%u", &majorVersion, &minorVersion);

    if (res == 2) {

      int version = majorVersion * 1000 + minorVersion;

      if (version < 3006) // 3.6 is Helios

      {

        this->SupportsVirtualFolders = false;

        this->SupportsMachO64Parser = false;

      }

      if (version < 3007) // 3.7 is Indigo

      {

        this->SupportsGmakeErrorParser = false;

      }

    }

  }

  // TODO: Decide if these are local or member variables

  this->HomeDirectory = lg->GetSourceDirectory();

  this->HomeOutputDirectory = lg->GetBinaryDirectory();

  this->GenerateLinkedResources =

    mf->IsOn("CMAKE_ECLIPSE_GENERATE_LINKED_RESOURCES");

  this->IsOutOfSourceBuild =

    (this->HomeDirectory != this->HomeOutputDirectory);

  this->GenerateSourceProject =

    (this->IsOutOfSourceBuild &&

     mf->IsOn("CMAKE_ECLIPSE_GENERATE_SOURCE_PROJECT"));

  if (!this->GenerateSourceProject &&

      (mf->IsOn("ECLIPSE_CDT4_GENERATE_SOURCE_PROJECT"))) {

    mf->IssueMessage(

      MessageType::WARNING,

      "ECLIPSE_CDT4_GENERATE_SOURCE_PROJECT is set to TRUE, "

      "but this variable is not supported anymore since CMake 2.8.7.\n"

      "Enable CMAKE_ECLIPSE_GENERATE_SOURCE_PROJECT instead.");

  }

  if (cmSystemTools::IsSubDirectory(this->HomeOutputDirectory,

                                    this->HomeDirectory)) {

    mf->IssueMessage(MessageType::WARNING,

                     "The build directory is a subdirectory "

                     "of the source directory.\n"

                     "This is not supported well by Eclipse. It is strongly "

                     "recommended to use a build directory which is a "

                     "sibling of the source directory.");

  }

  // NOTE: This is not good, since it pollutes the source tree. However,

  //       Eclipse doesn't allow CVS/SVN to work when the .project is not in

  //       the cvs/svn root directory. Hence, this is provided as an option.

  if (this->GenerateSourceProject) {

    // create .project file in the source tree

    this->CreateSourceProjectFile();

  }

  // create a .project file

  this->CreateProjectFile();

  // create a .cproject file

  this->CreateCProjectFile();

  // create resource settings

  this->CreateSettingsResourcePrefsFile();

}

void cmExtraEclipseCDT4Generator::CreateSettingsResourcePrefsFile()

{

  auto const& lg = this->GlobalGenerator->GetLocalGenerators()[0];

  cmMakefile* mf = lg->GetMakefile();

  std::string const filename =

    this->HomeOutputDirectory + "/.settings/org.eclipse.core.resources.prefs";

  cmGeneratedFileStream fout(filename);

  if (!fout) {

    return;

  }

  fout << "eclipse.preferences.version=1\n";

  cmValue encoding = mf->GetDefinition("CMAKE_ECLIPSE_RESOURCE_ENCODING");

  if (encoding) {

    fout << "encoding/<project>=" << *encoding << '\n';

  }

}

void cmExtraEclipseCDT4Generator::CreateSourceProjectFile()

{

  assert(this->HomeDirectory != this->HomeOutputDirectory);

  // set up the project name: <project>-Source@<baseSourcePathName>

  auto const& lg = this->GlobalGenerator->GetLocalGenerators()[0];

  std::string name = cmExtraEclipseCDT4Generator::GenerateProjectName(

    lg->GetProjectName(), "Source",

    cmExtraEclipseCDT4Generator::GetPathBasename(this->HomeDirectory));

  std::string const filename = this->HomeDirectory + "/.project";

  cmGeneratedFileStream fout(filename);

  if (!fout) {

    return;

  }

  cmXMLWriter xml(fout);

  xml.StartDocument("UTF-8");

  xml.StartElement("projectDescription");

  xml.Element("name", name);

  xml.Element("comment", "");

  xml.Element("projects", "");

  xml.Element("buildSpec", "");

  xml.Element("natures", "");

  xml.StartElement("linkedResources");

  if (this->SupportsVirtualFolders) {

    this->CreateLinksToSubprojects(xml, this->HomeDirectory);

    this->SrcLinkedResources.clear();

  }

  xml.EndElement(); // linkedResources

  xml.EndElement(); // projectDescription

  xml.EndDocument();

}

void cmExtraEclipseCDT4Generator::AddEnvVar(std::ostream& out,

                                            char const* envVar,

                                            cmLocalGenerator& lg)

{

  cmMakefile* mf = lg.GetMakefile();

  // get the variables from the environment and from the cache and then

  // figure out which one to use:

  std::string envVarValue;

  bool const envVarSet = cmSystemTools::GetEnv(envVar, envVarValue);

  std::string cacheEntryName = cmStrCat("CMAKE_ECLIPSE_ENVVAR_", envVar);

  cmValue cacheValue = lg.GetState()->GetInitializedCacheValue(cacheEntryName);

  // now we have both, decide which one to use

  std::string valueToUse;

  if (!envVarSet && !cacheValue) {

    // nothing known, do nothing

    valueToUse.clear();

  } else if (envVarSet && !cacheValue) {

    // The variable is in the env, but not in the cache. Use it and put it

    // in the cache

    valueToUse = envVarValue;

    mf->AddCacheDefinition(cacheEntryName, valueToUse, cacheEntryName,

                           cmStateEnums::STRING, true);

    mf->GetCMakeInstance()->SaveCache(lg.GetBinaryDirectory());

  } else if (!envVarSet && cacheValue) {

    // It is already in the cache, but not in the env, so use it from the cache

    valueToUse = *cacheValue;

  } else {

    // It is both in the cache and in the env.

    // Use the version from the env. except if the value from the env is

    // completely contained in the value from the cache (for the case that we

    // now have a PATH without MSVC dirs in the env. but had the full PATH with

    // all MSVC dirs during the cmake run which stored the var in the cache:

    valueToUse = *cacheValue;

    if (valueToUse.find(envVarValue) == std::string::npos) {

      valueToUse = envVarValue;

      mf->AddCacheDefinition(cacheEntryName, valueToUse, cacheEntryName,

                             cmStateEnums::STRING, true);

      mf->GetCMakeInstance()->SaveCache(lg.GetBinaryDirectory());

    }

  }

  if (!valueToUse.empty()) {

    out << envVar << "=" << valueToUse << "|";

  }

}

void cmExtraEclipseCDT4Generator::CreateProjectFile()

{

  auto const& lg = this->GlobalGenerator->GetLocalGenerators()[0];

  cmMakefile* mf = lg->GetMakefile();

  std::string const filename = this->HomeOutputDirectory + "/.project";

  cmGeneratedFileStream fout(filename);

  if (!fout) {

    return;

  }

  std::string compilerId = mf->GetSafeDefinition("CMAKE_C_COMPILER_ID");

  if (compilerId.empty()) // no C compiler, try the C++ compiler:

  {

    compilerId = mf->GetSafeDefinition("CMAKE_CXX_COMPILER_ID");

  }

  cmXMLWriter xml(fout);

  xml.StartDocument("UTF-8");

  xml.StartElement("projectDescription");

  xml.Element("name",

              cmExtraEclipseCDT4Generator::GenerateProjectName(

                lg->GetProjectName(),

                mf->GetSafeDefinition("CMAKE_BUILD_TYPE"),

                cmExtraEclipseCDT4Generator::GetPathBasename(

                  this->HomeOutputDirectory)));

  xml.Element("comment", "");

  xml.Element("projects", "");

  xml.StartElement("buildSpec");

  xml.StartElement("buildCommand");

  xml.Element("name", "org.eclipse.cdt.make.core.makeBuilder");

  xml.Element("triggers", "clean,full,incremental,");

  xml.StartElement("arguments");

  // use clean target

  AppendDictionary(xml, "org.eclipse.cdt.make.core.cleanBuildTarget", "clean");

  AppendDictionary(xml, "org.eclipse.cdt.make.core.enableCleanBuild", "true");

  AppendDictionary(xml, "org.eclipse.cdt.make.core.append_environment",

                   "true");

  AppendDictionary(xml, "org.eclipse.cdt.make.core.stopOnError", "true");

  // set the make command

  AppendDictionary(xml, "org.eclipse.cdt.make.core.enabledIncrementalBuild",

                   "true");

  AppendDictionary(xml, "org.eclipse.cdt.make.core.build.command",

                   cmExtraEclipseCDT4Generator::GetEclipsePath(

                     mf->GetRequiredDefinition("CMAKE_MAKE_PROGRAM")));

  AppendDictionary(xml, "org.eclipse.cdt.make.core.contents",

                   "org.eclipse.cdt.make.core.activeConfigSettings");

  AppendDictionary(xml, "org.eclipse.cdt.make.core.build.target.inc", "all");

  AppendDictionary(xml, "org.eclipse.cdt.make.core.build.arguments",

                   mf->GetSafeDefinition("CMAKE_ECLIPSE_MAKE_ARGUMENTS"));

  AppendDictionary(

    xml, "org.eclipse.cdt.make.core.buildLocation",

    cmExtraEclipseCDT4Generator::GetEclipsePath(this->HomeOutputDirectory));

  AppendDictionary(xml, "org.eclipse.cdt.make.core.useDefaultBuildCmd",

                   "false");

  // set project specific environment

  std::ostringstream environment;

  environment << "VERBOSE=1|CMAKE_NO_VERBOSE=1|"; // verbose Makefile output

  // set vsvars32.bat environment available at CMake time,

  //   but not necessarily when eclipse is open

  if (compilerId == "MSVC") {

    AddEnvVar(environment, "PATH", *lg);

    AddEnvVar(environment, "INCLUDE", *lg);

    AddEnvVar(environment, "LIB", *lg);

    AddEnvVar(environment, "LIBPATH", *lg);

  } else if (compilerId == "Intel") {

    // if the env.var is set, use this one and put it in the cache

    // if the env.var is not set, but the value is in the cache,

    // use it from the cache:

    AddEnvVar(environment, "INTEL_LICENSE_FILE", *lg);

  }

  AppendDictionary(xml, "org.eclipse.cdt.make.core.environment",

                   environment.str());

  AppendDictionary(xml, "org.eclipse.cdt.make.core.enableFullBuild", "true");

  AppendDictionary(xml, "org.eclipse.cdt.make.core.build.target.auto", "all");

  AppendDictionary(xml, "org.eclipse.cdt.make.core.enableAutoBuild", "false");

  AppendDictionary(xml, "org.eclipse.cdt.make.core.build.target.clean",

                   "clean");

  AppendDictionary(xml, "org.eclipse.cdt.make.core.fullBuildTarget", "all");

  AppendDictionary(xml, "org.eclipse.cdt.make.core.buildArguments", "");

  AppendDictionary(

    xml, "org.eclipse.cdt.make.core.build.location",

    cmExtraEclipseCDT4Generator::GetEclipsePath(this->HomeOutputDirectory));

  AppendDictionary(xml, "org.eclipse.cdt.make.core.autoBuildTarget", "all");

  // set error parsers

  std::ostringstream errorOutputParser;

  if (compilerId == "MSVC") {

    errorOutputParser << "org.eclipse.cdt.core.VCErrorParser;";

  } else if (compilerId == "Intel") {

    errorOutputParser << "org.eclipse.cdt.core.ICCErrorParser;";

  }

  if (this->SupportsGmakeErrorParser) {

    errorOutputParser << "org.eclipse.cdt.core.GmakeErrorParser;";

  } else {

    errorOutputParser << "org.eclipse.cdt.core.MakeErrorParser;";

  }

  errorOutputParser << "org.eclipse.cdt.core.GCCErrorParser;"

                       "org.eclipse.cdt.core.GASErrorParser;"

                       "org.eclipse.cdt.core.GLDErrorParser;";

  AppendDictionary(xml, "org.eclipse.cdt.core.errorOutputParser",

                   errorOutputParser.str());

  xml.EndElement(); // arguments

  xml.EndElement(); // buildCommand

  xml.StartElement("buildCommand");

  xml.Element("name", "org.eclipse.cdt.make.core.ScannerConfigBuilder");

  xml.StartElement("arguments");

  xml.EndElement(); // arguments

  xml.EndElement(); // buildCommand

  xml.EndElement(); // buildSpec

  // set natures for c/c++ projects

  xml.StartElement("natures");

  xml.Element("nature", "org.eclipse.cdt.make.core.makeNature");

  xml.Element("nature", "org.eclipse.cdt.make.core.ScannerConfigNature");

  for (std::string const& n : this->Natures) {

    xml.Element("nature", n);

  }

  if (cmValue extraNaturesProp =

        mf->GetState()->GetGlobalProperty("ECLIPSE_EXTRA_NATURES")) {

    cmList extraNatures{ *extraNaturesProp };

    for (std::string const& n : extraNatures) {

      xml.Element("nature", n);

    }

  }

  xml.EndElement(); // natures

  xml.StartElement("linkedResources");

  // create linked resources

  if (this->IsOutOfSourceBuild) {

    // create a linked resource to CMAKE_SOURCE_DIR

    // (this is not done anymore for each project because of

    // https://gitlab.kitware.com/cmake/cmake/-/issues/9978 and because I found

    // it actually quite confusing in bigger projects with many directories and

    // projects, Alex

    std::string sourceLinkedResourceName = "[Source directory]";

    std::string linkSourceDirectory =

      cmExtraEclipseCDT4Generator::GetEclipsePath(

        lg->GetCurrentSourceDirectory());

    // .project dir can't be subdir of a linked resource dir

    if (!cmSystemTools::IsSubDirectory(this->HomeOutputDirectory,

                                       linkSourceDirectory)) {

      cmExtraEclipseCDT4Generator::AppendLinkedResource(

        xml, sourceLinkedResourceName,

        cmExtraEclipseCDT4Generator::GetEclipsePath(linkSourceDirectory),

        LinkToFolder);

      this->SrcLinkedResources.push_back(std::move(sourceLinkedResourceName));

    }

  }

  if (this->SupportsVirtualFolders) {

    this->CreateLinksToSubprojects(xml, this->HomeOutputDirectory);

    this->CreateLinksForTargets(xml);

  }

  xml.EndElement(); // linkedResources

  xml.EndElement(); // projectDescription

}

void cmExtraEclipseCDT4Generator::WriteGroups(

  SourceGroupVector const& sourceGroups,

  cmSourceGroupFiles const& sourceGroupFiles, std::string& linkName,

  cmXMLWriter& xml)

{

  for (auto const& sg : sourceGroups) {

    std::string linkName3 = cmStrCat(linkName, '/', sg->GetFullName());

    std::replace(linkName3.begin(), linkName3.end(), '\\', '/');

    cmExtraEclipseCDT4Generator::AppendLinkedResource(

      xml, linkName3, "virtual:/virtual", VirtualFolder);

    SourceGroupVector const& children = sg->GetGroupChildren();

    if (!children.empty()) {

      this->WriteGroups(children, sourceGroupFiles, linkName, xml);

    }

    std::vector<cmSourceFile const*> const& sourceFiles =

      sourceGroupFiles.GetSourceFiles(sg.get());

    for (cmSourceFile const* file : sourceFiles) {

      std::string const& fullPath = file->GetFullPath();

      if (!cmSystemTools::FileIsDirectory(fullPath)) {

        std::string linkName4 =

          cmStrCat(linkName3, '/', cmSystemTools::GetFilenameName(fullPath));

        cmExtraEclipseCDT4Generator::AppendLinkedResource(

          xml, linkName4,

          cmExtraEclipseCDT4Generator::GetEclipsePath(fullPath), LinkToFile);

      }

    }

  }

}

void cmExtraEclipseCDT4Generator::CreateLinksForTargets(cmXMLWriter& xml)

{

  std::string linkName = "[Targets]";

  cmExtraEclipseCDT4Generator::AppendLinkedResource(

    xml, linkName, "virtual:/virtual", VirtualFolder);

  for (auto const& lg : this->GlobalGenerator->GetLocalGenerators()) {

    cmMakefile* makefile = lg->GetMakefile();

    auto const& targets = lg->GetGeneratorTargets();

    for (auto const& target : targets) {

      std::string linkName2 = cmStrCat(linkName, '/');

      switch (target->GetType()) {

        case cmStateEnums::EXECUTABLE:

        case cmStateEnums::STATIC_LIBRARY:

        case cmStateEnums::SHARED_LIBRARY:

        case cmStateEnums::MODULE_LIBRARY:

        case cmStateEnums::OBJECT_LIBRARY: {

          char const* prefix =

            (target->GetType() == cmStateEnums::EXECUTABLE ? "[exe] "

                                                           : "[lib] ");

          linkName2 += prefix;

          linkName2 += target->GetName();

          cmExtraEclipseCDT4Generator::AppendLinkedResource(

            xml, linkName2, "virtual:/virtual", VirtualFolder);

          if (!this->GenerateLinkedResources) {

            break; // skip generating the linked resources to the source files

          }

          // get the files from the source lists then add them to the groups

          cmSourceGroupFiles sourceGroupFiles;

          std::vector<cmSourceFile*> files;

          target->GetSourceFiles(

            files, makefile->GetSafeDefinition("CMAKE_BUILD_TYPE"));

          for (cmSourceFile* sf : files) {

            // Add the file to the list of sources.

            sourceGroupFiles.Add(lg->FindSourceGroup(sf->ResolveFullPath()),

                                 sf);

          }

          this->WriteGroups(makefile->GetSourceGroups(), sourceGroupFiles,

                            linkName2, xml);

        } break;

        // ignore all others:

        default:

          break;

      }

    }

  }

}

void cmExtraEclipseCDT4Generator::CreateLinksToSubprojects(

  cmXMLWriter& xml, std::string const& baseDir)

{

  if (!this->GenerateLinkedResources) {

    return;

  }

  // for each sub project create a linked resource to the source dir

  // - only if it is an out-of-source build

  cmExtraEclipseCDT4Generator::AppendLinkedResource(

    xml, "[Subprojects]", "virtual:/virtual", VirtualFolder);

  for (auto const& it : this->GlobalGenerator->GetProjectMap()) {

    std::string linkSourceDirectory =

      cmExtraEclipseCDT4Generator::GetEclipsePath(

        it.second[0]->GetCurrentSourceDirectory());

    // a linked resource must not point to a parent directory of .project or

    // .project itself

    if ((baseDir != linkSourceDirectory) &&

        !cmSystemTools::IsSubDirectory(baseDir, linkSourceDirectory)) {

      std::string linkName = cmStrCat("[Subprojects]/", it.first);

      cmExtraEclipseCDT4Generator::AppendLinkedResource(

        xml, linkName,

        cmExtraEclipseCDT4Generator::GetEclipsePath(linkSourceDirectory),

        LinkToFolder);

      // Don't add it to the srcLinkedResources, because listing multiple

      // directories confuses the Eclipse indexer (#13596).

    }

  }

}

void cmExtraEclipseCDT4Generator::AppendIncludeDirectories(

  cmXMLWriter& xml, std::vector<std::string> const& includeDirs,

  std::set<std::string>& emittedDirs)

{

  for (std::string const& inc : includeDirs) {

    if (!inc.empty()) {

      std::string dir = cmSystemTools::CollapseFullPath(inc);

      // handle framework include dirs on OSX, the remainder after the

      // Frameworks/ part has to be stripped

      //   /System/Library/Frameworks/GLUT.framework/Headers

      cmsys::RegularExpression frameworkRx("(.+/Frameworks)/.+\\.framework/");

      if (frameworkRx.find(dir)) {

        dir = frameworkRx.match(1);

      }

      if (emittedDirs.insert(dir).second) {

        xml.StartElement("pathentry");

        xml.Attribute("include",

                      cmExtraEclipseCDT4Generator::GetEclipsePath(dir));

        xml.Attribute("kind", "inc");

        xml.Attribute("path", "");

        xml.Attribute("system", "true");

        xml.EndElement();

      }

    }

  }

}

void cmExtraEclipseCDT4Generator::CreateCProjectFile() const

{

  std::set<std::string> emitted;

  auto const& lg = this->GlobalGenerator->GetLocalGenerators()[0];

  cmMakefile const* mf = lg->GetMakefile();

  std::string const filename = this->HomeOutputDirectory + "/.cproject";

  cmGeneratedFileStream fout(filename);

  if (!fout) {

    return;

  }

  cmXMLWriter xml(fout);

  // add header

  xml.StartDocument("UTF-8");

  xml.ProcessingInstruction("fileVersion", "4.0.0");

  xml.StartElement("cproject");

  xml.StartElement("storageModule");

  xml.Attribute("moduleId", "org.eclipse.cdt.core.settings");

  xml.StartElement("cconfiguration"); // noqa: spellcheck disable-line

  xml.Attribute("id", "org.eclipse.cdt.core.default.config.1");

  // Configuration settings...

  xml.StartElement("storageModule");

  xml.Attribute("buildSystemId",

                "org.eclipse.cdt.core.defaultConfigDataProvider");

  xml.Attribute("id", "org.eclipse.cdt.core.default.config.1");

  xml.Attribute("moduleId", "org.eclipse.cdt.core.settings");

  xml.Attribute("name", "Configuration");

  xml.Element("externalSettings");

  xml.StartElement("extensions");

  // TODO: refactor this out...

  std::string executableFormat =

    mf->GetSafeDefinition("CMAKE_EXECUTABLE_FORMAT");

  if (executableFormat == "ELF") {

    xml.StartElement("extension");

    xml.Attribute("id", "org.eclipse.cdt.core.ELF");

    xml.Attribute("point", "org.eclipse.cdt.core.BinaryParser");

    xml.EndElement(); // extension

    xml.StartElement("extension");

    xml.Attribute("id", "org.eclipse.cdt.core.GNU_ELF");

    xml.Attribute("point", "org.eclipse.cdt.core.BinaryParser");

    AppendAttribute(xml, "addr2line");

    AppendAttribute(xml, "c++filt");

    xml.EndElement(); // extension

  } else {

    std::string systemName = mf->GetSafeDefinition("CMAKE_SYSTEM_NAME");

    if (systemName == "CYGWIN" || systemName == "MSYS") {

      xml.StartElement("extension");

      xml.Attribute("id", "org.eclipse.cdt.core.Cygwin_PE");

      xml.Attribute("point", "org.eclipse.cdt.core.BinaryParser");

      AppendAttribute(xml, "addr2line");

      AppendAttribute(xml, "c++filt");

      AppendAttribute(xml, "cygpath");

      AppendAttribute(xml, "nm");

      xml.EndElement(); // extension

    } else if (systemName == "Windows") {

      xml.StartElement("extension");

      xml.Attribute("id", "org.eclipse.cdt.core.PE");

      xml.Attribute("point", "org.eclipse.cdt.core.BinaryParser");

      xml.EndElement(); // extension

    } else if (systemName == "Darwin") {

      xml.StartElement("extension");

      xml.Attribute("id",

                    this->SupportsMachO64Parser

                      ? "org.eclipse.cdt.core.MachO64"

                      : "org.eclipse.cdt.core.MachO");

      xml.Attribute("point", "org.eclipse.cdt.core.BinaryParser");

      AppendAttribute(xml, "c++filt");

      xml.EndElement(); // extension

    } else {

      // *** Should never get here ***

      xml.Element("error_toolchain_type");

    }

  }

  xml.EndElement(); // extensions

  xml.EndElement(); // storageModule

  // ???

  xml.StartElement("storageModule");

  xml.Attribute("moduleId", "org.eclipse.cdt.core.language.mapping");

  xml.Element("project-mappings");

  xml.EndElement(); // storageModule

  // ???

  xml.StartElement("storageModule");

  xml.Attribute("moduleId", "org.eclipse.cdt.core.externalSettings");

  xml.EndElement(); // storageModule

  // set the path entries (includes, libs, source dirs, etc.)

  xml.StartElement("storageModule");

  xml.Attribute("moduleId", "org.eclipse.cdt.core.pathentry");

  // for each sub project with a linked resource to the source dir:

  // - make it type 'src'

  // - and exclude it from type 'out'

  std::string excludeFromOut;

  /* I don't know what the pathentry kind="src" are good for, e.g.

   * autocompletion

   * works also without them. Done wrong, the indexer complains, see #12417

   * and #12213.

   * According to #13596, this entry at least limits the directories the

   * indexer is searching for files. So now the "src" entry contains only

   * the linked resource to CMAKE_SOURCE_DIR.

   * The CDT documentation is very terse on that:

   * "CDT_SOURCE: Entry kind constant describing a path entry identifying a

   * folder containing source code to be compiled."

   * Also on the cdt-dev list didn't bring any information:

   * http://web.archiveorange.com/archive/v/B4NlJDNIpYoOS1SbxFNy

   * Alex */

  // include subprojects directory to the src pathentry

  // eclipse cdt indexer uses this entries as reference to index source files

  if (this->GenerateLinkedResources) {

    xml.StartElement("pathentry");

    xml.Attribute("kind", "src");

    xml.Attribute("path", "[Subprojects]");

    xml.EndElement();

  }

  for (std::string const& p : this->SrcLinkedResources) {

    xml.StartElement("pathentry");

    xml.Attribute("kind", "src");

    xml.Attribute("path", p);

    xml.EndElement();

    // exclude source directory from output search path

    // - only if not named the same as an output directory

    if (!cmSystemTools::FileIsDirectory(

          cmStrCat(this->HomeOutputDirectory, '/', p))) {

      excludeFromOut = cmStrCat(std::move(excludeFromOut), p, "/|");

    }

  }

  excludeFromOut += "**/CMakeFiles/";

  xml.StartElement("pathentry");

  xml.Attribute("excluding", excludeFromOut);

  xml.Attribute("kind", "out");

  xml.Attribute("path", "");

  xml.EndElement();

  // add pre-processor definitions to allow eclipse to gray out sections

  emitted.clear();

  for (auto const& lgen : this->GlobalGenerator->GetLocalGenerators()) {

    if (cmValue cdefs =

          lgen->GetMakefile()->GetProperty("COMPILE_DEFINITIONS")) {

      // Expand the list.

      std::vector<std::string> defs;

      cmGeneratorExpression::Split(*cdefs, defs);

      for (std::string const& d : defs) {

        if (cmGeneratorExpression::Find(d) != std::string::npos) {

          continue;

        }

        std::string::size_type equals = d.find('=', 0);

        std::string::size_type enddef = d.length();

        std::string def;

        std::string val;

        if (equals != std::string::npos && equals < enddef) {

          // we have -DFOO=BAR

          def = d.substr(0, equals);

          val = d.substr(equals + 1, enddef - equals + 1);

        } else {

          // we have -DFOO

          def = d;

        }

        // insert the definition if not already added.

        if (emitted.insert(def).second) {

          xml.StartElement("pathentry");

          xml.Attribute("kind", "mac");

          xml.Attribute("name", def);

          xml.Attribute("path", "");

          xml.Attribute("value", val);

          xml.EndElement();

        }

      }

    }

  }

  // add system defined c macros

  cmValue cDefs =

    mf->GetDefinition("CMAKE_EXTRA_GENERATOR_C_SYSTEM_DEFINED_MACROS");

  if (this->CEnabled && cDefs) {

    // Expand the list.

    cmList defs{ *cDefs, cmList::EmptyElements::Yes };

    // the list must contain only definition-value pairs:

    if ((defs.size() % 2) == 0) {

      auto di = defs.begin();

      while (di != defs.end()) {

        std::string def = *di;

        ++di;

        std::string val;

        if (di != defs.end()) {

          val = *di;

          ++di;

        }

        // insert the definition if not already added.

        if (emitted.insert(def).second) {

          xml.StartElement("pathentry");

          xml.Attribute("kind", "mac");

          xml.Attribute("name", def);

          xml.Attribute("path", "");

          xml.Attribute("value", val);

          xml.EndElement();

        }

      }

    }

  }

  // add system defined c++ macros

  cmValue cxxDefs =

    mf->GetDefinition("CMAKE_EXTRA_GENERATOR_CXX_SYSTEM_DEFINED_MACROS");

  if (this->CXXEnabled && cxxDefs) {

    // Expand the list.

    cmList defs{ *cxxDefs, cmList::EmptyElements::Yes };

    // the list must contain only definition-value pairs:

    if ((defs.size() % 2) == 0) {

      auto di = defs.begin();

      while (di != defs.end()) {

        std::string def = *di;

        ++di;

        std::string val;

        if (di != defs.end()) {

          val = *di;

          ++di;

        }

        // insert the definition if not already added.

        if (emitted.insert(def).second) {

          xml.StartElement("pathentry");

          xml.Attribute("kind", "mac");

          xml.Attribute("name", def);

          xml.Attribute("path", "");

          xml.Attribute("value", val);

          xml.EndElement();

        }

      }

    }

  }

  // include dirs

  emitted.clear();

  for (auto const& lgen : this->GlobalGenerator->GetLocalGenerators()) {

    auto const& targets = lgen->GetGeneratorTargets();

    for (auto const& target : targets) {

      if (target->GetType() == cmStateEnums::INTERFACE_LIBRARY) {

        continue;

      }

      std::vector<std::string> includeDirs;

      std::string config = mf->GetSafeDefinition("CMAKE_BUILD_TYPE");

      lgen->GetIncludeDirectories(includeDirs, target.get(), "C", config);

      this->AppendIncludeDirectories(xml, includeDirs, emitted);

    }

  }

  // now also the system include directories, in case we found them in

  // CMakeSystemSpecificInformation.cmake. This makes Eclipse find the

  // standard headers.

  std::string compiler = mf->GetSafeDefinition("CMAKE_C_COMPILER");

  if (this->CEnabled && !compiler.empty()) {

    std::string systemIncludeDirs =

      mf->GetSafeDefinition("CMAKE_EXTRA_GENERATOR_C_SYSTEM_INCLUDE_DIRS");

    cmList dirs{ systemIncludeDirs };

    this->AppendIncludeDirectories(xml, dirs, emitted);

  }

  compiler = mf->GetSafeDefinition("CMAKE_CXX_COMPILER");

  if (this->CXXEnabled && !compiler.empty()) {

    std::string systemIncludeDirs =

      mf->GetSafeDefinition("CMAKE_EXTRA_GENERATOR_CXX_SYSTEM_INCLUDE_DIRS");

    cmList dirs{ systemIncludeDirs };

    this->AppendIncludeDirectories(xml, dirs, emitted);

  }

  xml.EndElement(); // storageModule

  // add build targets

  xml.StartElement("storageModule");

  xml.Attribute("moduleId", "org.eclipse.cdt.make.core.buildtargets");

  xml.StartElement("buildTargets");

  emitted.clear();

  std::string const& make = mf->GetRequiredDefinition("CMAKE_MAKE_PROGRAM");

  std::string const& makeArgs =

    mf->GetSafeDefinition("CMAKE_ECLIPSE_MAKE_ARGUMENTS");