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

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

/* clang-format off */

#include "cmGeneratorTarget.h"

/* clang-format on */

#include <cstddef>

#include <functional>

#include <map>

#include <memory>

#include <set>

#include <sstream>

#include <string>

#include <unordered_set>

#include <utility>

#include <vector>

#include <cm/string_view>

#include <cmext/algorithm>

#include "cmsys/RegularExpression.hxx"

#include "cmEvaluatedTargetProperty.h"

#include "cmFileSetMetadata.h"

#include "cmGenExContext.h"

#include "cmGeneratorExpression.h"

#include "cmGeneratorExpressionDAGChecker.h"

#include "cmGeneratorFileSet.h"

#include "cmGeneratorFileSets.h"

#include "cmGlobalGenerator.h"

#include "cmLinkItem.h"

#include "cmList.h"

#include "cmListFileCache.h"

#include "cmLocalGenerator.h"

#include "cmMakefile.h"

#include "cmMessageType.h"

#include "cmSourceFile.h"

#include "cmSourceFileLocation.h"

#include "cmSourceGroup.h"

#include "cmStateTypes.h"

#include "cmStringAlgorithms.h"

#include "cmSystemTools.h"

#include "cmTarget.h"

#include "cmValue.h"

#include "cmake.h"

namespace {

using UseTo = cmGeneratorTarget::UseTo;

void AddObjectEntries(cmGeneratorTarget const* headTarget,

                      cm::GenEx::Context const& context,

                      cmGeneratorExpressionDAGChecker* dagChecker,

                      EvaluatedTargetPropertyEntries& entries)

{

  if (cmLinkImplementationLibraries const* impl =

        headTarget->GetLinkImplementationLibraries(context.Config,

                                                   UseTo::Link)) {

    entries.HadContextSensitiveCondition = impl->HadContextSensitiveCondition;

    for (cmLinkItem const& lib : impl->Libraries) {

      if (lib.Target &&

          lib.Target->GetType() == cmStateEnums::OBJECT_LIBRARY) {

        std::string uniqueName =

          headTarget->GetGlobalGenerator()->IndexGeneratorTargetUniquely(

            lib.Target);

        std::string genex =

          cmStrCat("$<TARGET_OBJECTS:", std::move(uniqueName), '>');

        cmGeneratorExpression ge(*headTarget->Makefile->GetCMakeInstance(),

                                 lib.Backtrace);

        std::unique_ptr<cmCompiledGeneratorExpression> cge =

          ge.Parse(std::move(genex));

        cge->SetEvaluateForBuildsystem(true);

        EvaluatedTargetPropertyEntry ee(lib, lib.Backtrace);

        cmExpandList(cge->Evaluate(context, dagChecker, headTarget),

                     ee.Values);

        if (cge->GetHadContextSensitiveCondition()) {

          ee.ContextDependent = true;

        }

        entries.Entries.emplace_back(std::move(ee));

      }

    }

  }

}

void AddFileSetEntries(cmGeneratorTarget const* headTarget,

                       cmGeneratorFileSets const* fileSets,

                       cm::GenEx::Context const& context,

                       cmGeneratorExpressionDAGChecker* dagChecker,

                       EvaluatedTargetPropertyEntries& entries)

{

  auto sources = fileSets->GetSources(context, headTarget, dagChecker);

  entries =

    EvaluateTargetPropertyEntries(headTarget, context, dagChecker, sources);

}

bool processSources(cmGeneratorTarget const* tgt,

                    EvaluatedTargetPropertyEntries& entries,

                    std::vector<BT<std::string>>& srcs,

                    std::unordered_set<std::string>& uniqueSrcs,

                    bool debugSources,

                    std::function<void(cmSourceFile*)> postProcess = {})

{

  cmMakefile* mf = tgt->Target->GetMakefile();

  bool contextDependent = entries.HadContextSensitiveCondition;

  for (EvaluatedTargetPropertyEntry& entry : entries.Entries) {

    if (entry.ContextDependent) {

      contextDependent = true;

    }

    cmLinkItem const& item = entry.LinkItem;

    std::string const& targetName = item.AsStr();

    for (std::string& src : entry.Values) {

      cmSourceFile* sf = mf->GetOrCreateSource(src);

      std::string e;

      std::string w;

      std::string fullPath = sf->ResolveFullPath(&e, &w);

      cmake* cm = tgt->GetLocalGenerator()->GetCMakeInstance();

      if (!w.empty()) {

        cm->IssueMessage(MessageType::AUTHOR_WARNING, w, entry.Backtrace);

      }

      if (fullPath.empty()) {

        if (!e.empty()) {

          cm->IssueMessage(MessageType::FATAL_ERROR, e, entry.Backtrace);

        }

        return contextDependent;

      }

      if (!targetName.empty() && !cmSystemTools::FileIsFullPath(src)) {

        std::ostringstream err;

        if (!targetName.empty()) {

          err << "Target \"" << targetName

              << "\" contains relative path in its INTERFACE_SOURCES:\n  \""

              << src << "\"";

        } else {

          err << "Found relative path while evaluating sources of \""

              << tgt->GetName() << "\":\n  \"" << src << "\"\n";

        }

        tgt->GetLocalGenerator()->IssueMessage(MessageType::FATAL_ERROR,

                                               err.str());

        return contextDependent;

      }

      src = fullPath;

      if (postProcess) {

        postProcess(sf);

      }

    }

    std::string usedSources;

    for (std::string const& src : entry.Values) {

      if (uniqueSrcs.insert(src).second) {

        srcs.emplace_back(src, entry.Backtrace);

        if (debugSources) {

          usedSources += cmStrCat(" * ", src, '\n');

        }

      }

    }

    if (!usedSources.empty()) {

      tgt->GetLocalGenerator()->GetCMakeInstance()->IssueMessage(

        MessageType::LOG,

        cmStrCat("Used sources for target ", tgt->GetName(), ":\n",

                 usedSources),

        entry.Backtrace);

    }

  }

  return contextDependent;

}

}

std::vector<BT<std::string>> cmGeneratorTarget::GetSourceFilePaths(

  std::string const& config) const

{

  std::vector<BT<std::string>> files;

  cmList debugProperties{ this->Makefile->GetDefinition(

    "CMAKE_DEBUG_TARGET_PROPERTIES") };

  bool debugSources =

    !this->DebugSourcesDone && cm::contains(debugProperties, "SOURCES");

  this->DebugSourcesDone = true;

  cm::GenEx::Context context(this->LocalGenerator, config,

                             /*language=*/std::string());

  cmGeneratorExpressionDAGChecker dagChecker{

    this, "SOURCES", nullptr, nullptr, context,

  };

  EvaluatedTargetPropertyEntries entries = EvaluateTargetPropertyEntries(

    this, context, &dagChecker, this->SourceEntries);

  std::unordered_set<std::string> uniqueSrcs;

  bool contextDependentDirectSources =

    processSources(this, entries, files, uniqueSrcs, debugSources);

  // Collect INTERFACE_SOURCES of all direct link-dependencies.

  EvaluatedTargetPropertyEntries linkInterfaceSourcesEntries;

  AddInterfaceEntries(this, "INTERFACE_SOURCES", context, &dagChecker,

                      linkInterfaceSourcesEntries, IncludeRuntimeInterface::No,

                      UseTo::Compile);

  bool contextDependentInterfaceSources = processSources(

    this, linkInterfaceSourcesEntries, files, uniqueSrcs, debugSources);

  // Collect TARGET_OBJECTS of direct object link-dependencies.

  bool contextDependentObjects = false;

  if (this->GetType() != cmStateEnums::OBJECT_LIBRARY) {

    EvaluatedTargetPropertyEntries linkObjectsEntries;

    AddObjectEntries(this, context, &dagChecker, linkObjectsEntries);

    contextDependentObjects = processSources(this, linkObjectsEntries, files,

                                             uniqueSrcs, debugSources);

    // Note that for imported targets or multi-config generators supporting

    // cross-config builds the paths to the object files must be per-config,

    // so contextDependentObjects will be true here even if object libraries

    // are specified without per-config generator expressions.

  }

  // Collect this target's file sets.

  EvaluatedTargetPropertyEntries fileSetEntries;

  AddFileSetEntries(this, this->FileSets.get(), context, &dagChecker,

                    fileSetEntries);

  auto processFileSetEntry = [this, &config](cmSourceFile* sf) {

    auto const* fileSet = this->GetFileSetForSource(config, sf);

    if (fileSet->GetType() == cm::FileSetMetadata::HEADERS) {

      sf->SetProperty("HEADER_FILE_ONLY", "TRUE");

    }

#if !defined(CMAKE_BOOTSTRAP)

    cmMakefile* mf = this->Target->GetMakefile();

    auto const& path = sf->GetFullPath();

    bool found = false;

    for (auto const& sg : mf->GetSourceGroups()) {

      if (sg->MatchChildrenFiles(path)) {

        found = true;

        break;

      }

    }

    if (!found) {

      if (fileSet->GetType() == cm::FileSetMetadata::HEADERS) {

        mf->GetOrCreateSourceGroup("Header Files")->AddGroupFile(path);

      }

    }

#endif

  };

  bool contextDependentFileSets =

    processSources(this, fileSetEntries, files, uniqueSrcs, debugSources,

                   processFileSetEntry);

  // Determine if sources are context-dependent or not.

  if (!contextDependentDirectSources && !contextDependentInterfaceSources &&

      !contextDependentObjects && !contextDependentFileSets) {

    this->SourcesAreContextDependent = Tribool::False;

  } else {

    this->SourcesAreContextDependent = Tribool::True;

  }

  return files;

}

void cmGeneratorTarget::GetSourceFiles(std::vector<cmSourceFile*>& files,

                                       std::string const& config) const

{

  std::vector<BT<cmSourceFile*>> tmp = this->GetSourceFiles(config);

  files.reserve(tmp.size());

  for (BT<cmSourceFile*>& v : tmp) {

    files.push_back(v.Value);

  }

}

std::vector<BT<cmSourceFile*>> cmGeneratorTarget::GetSourceFiles(

  std::string const& config) const

{

  std::vector<BT<cmSourceFile*>> files;

  KindedSources const& kinded = this->GetKindedSources(config);

  files.reserve(kinded.Sources.size());

  for (SourceAndKind const& si : kinded.Sources) {

    files.push_back(si.Source);

  }

  return files;

}

void cmGeneratorTarget::GetSourceFilesWithoutObjectLibraries(

  std::vector<cmSourceFile*>& files, std::string const& config) const

{

  std::vector<BT<cmSourceFile*>> tmp =

    this->GetSourceFilesWithoutObjectLibraries(config);

  files.reserve(tmp.size());

  for (BT<cmSourceFile*>& v : tmp) {

    files.push_back(v.Value);

  }

}

std::vector<BT<cmSourceFile*>>

cmGeneratorTarget::GetSourceFilesWithoutObjectLibraries(

  std::string const& config) const

{

  std::vector<BT<cmSourceFile*>> files;

  KindedSources const& kinded = this->GetKindedSources(config);

  files.reserve(kinded.Sources.size());

  for (SourceAndKind const& si : kinded.Sources) {

    if (si.Source.Value->GetObjectLibrary().empty()) {

      files.push_back(si.Source);

    }

  }

  return files;

}

cmGeneratorTarget::KindedSources const& cmGeneratorTarget::GetKindedSources(

  std::string const& config) const

{

  // If we already processed one configuration and found no dependency

  // on configuration then always use the one result.

  if (this->SourcesAreContextDependent == Tribool::False) {

    return this->KindedSourcesMap.begin()->second;

  }

  // Lookup any existing link implementation for this configuration.

  std::string const key = cmSystemTools::UpperCase(config);

  auto it = this->KindedSourcesMap.find(key);

  if (it != this->KindedSourcesMap.end()) {

    if (!it->second.Initialized) {

      std::ostringstream e;

      e << "The SOURCES of \"" << this->GetName()

        << "\" use a generator expression that depends on the "

           "SOURCES themselves.";

      this->GlobalGenerator->GetCMakeInstance()->IssueMessage(

        MessageType::FATAL_ERROR, e.str(), this->GetBacktrace());

      static KindedSources empty;

      return empty;

    }

    return it->second;

  }

  // Add an entry to the map for this configuration.

  KindedSources& files = this->KindedSourcesMap[key];

  this->ComputeKindedSources(files, config);

  files.Initialized = true;

  return files;

}

void cmGeneratorTarget::ComputeKindedSources(KindedSources& files,

                                             std::string const& config) const

{

  // Get the source file paths by string.

  std::vector<BT<std::string>> srcs = this->GetSourceFilePaths(config);

  cmsys::RegularExpression header_regex(CM_HEADER_REGEX);

  std::vector<cmSourceFile*> badObjLib;

  std::set<cmSourceFile*> emitted;

  for (BT<std::string> const& s : srcs) {

    // Create each source at most once.

    cmSourceFile* sf = this->Makefile->GetOrCreateSource(s.Value);

    if (!emitted.insert(sf).second) {

      continue;

    }

    // Compute the kind (classification) of this source file.

    SourceKind kind;

    std::string ext = cmSystemTools::LowerCase(sf->GetExtension());

    cmGeneratorFileSet const* fs = this->GetFileSetForSource(config, sf);

    if (sf->GetCustomCommand()) {

      kind = SourceKindCustomCommand;

    } else if (!this->Target->IsNormal() && !this->Target->IsImported() &&

               fs && (fs->GetType() == cm::FileSetMetadata::CXX_MODULES)) {

      kind = SourceKindCxxModuleSource;

    } else if (this->Target->GetType() == cmStateEnums::UTILITY ||

               this->Target->GetType() == cmStateEnums::INTERFACE_LIBRARY

               // XXX(clang-tidy): https://bugs.llvm.org/show_bug.cgi?id=44165

               // NOLINTNEXTLINE(bugprone-branch-clone)

    ) {

      kind = SourceKindExtra;

    } else if (this->IsSourceFilePartOfUnityBatch(sf->ResolveFullPath())) {

      kind = SourceKindUnityBatched;

      // XXX(clang-tidy): https://bugs.llvm.org/show_bug.cgi?id=44165

      // NOLINTNEXTLINE(bugprone-branch-clone)

    } else if (sf->GetPropertyAsBool("HEADER_FILE_ONLY")) {

      kind = SourceKindHeader;

    } else if (sf->GetPropertyAsBool("EXTERNAL_OBJECT")) {

      kind = SourceKindExternalObject;

    } else if (!sf->GetOrDetermineLanguage().empty()) {

      kind = SourceKindObjectSource;

    } else if (ext == "def") {

      kind = SourceKindModuleDefinition;

      if (this->GetType() == cmStateEnums::OBJECT_LIBRARY) {

        badObjLib.push_back(sf);

      }

    } else if (ext == "idl") {

      kind = SourceKindIDL;

      if (this->GetType() == cmStateEnums::OBJECT_LIBRARY) {

        badObjLib.push_back(sf);

      }

    } else if (ext == "resx") {

      kind = SourceKindResx;

    } else if (ext == "appxmanifest") {

      kind = SourceKindAppManifest;

    } else if (ext == "manifest") {

      if (sf->GetPropertyAsBool("VS_DEPLOYMENT_CONTENT")) {

        kind = SourceKindExtra;

      } else {

        kind = SourceKindManifest;

      }

    } else if (ext == "pfx") {

      kind = SourceKindCertificate;

    } else if (ext == "xaml") {

      kind = SourceKindXaml;

    } else if (header_regex.find(sf->ResolveFullPath())) {

      kind = SourceKindHeader;

    } else {

      kind = SourceKindExtra;

    }

    // Save this classified source file in the result vector.

    files.Sources.push_back({ BT<cmSourceFile*>(sf, s.Backtrace), kind });

  }

  if (!badObjLib.empty()) {

    std::ostringstream e;

    e << "OBJECT library \"" << this->GetName() << "\" contains:\n";

    for (cmSourceFile* i : badObjLib) {

      e << "  " << i->GetLocation().GetName() << "\n";

    }

    e << "but may contain only sources that compile, header files, and "

         "other files that would not affect linking of a normal library.";

    this->GlobalGenerator->GetCMakeInstance()->IssueMessage(

      MessageType::FATAL_ERROR, e.str(), this->GetBacktrace());

  }

}

std::vector<cmGeneratorTarget::AllConfigSource> const&

cmGeneratorTarget::GetAllConfigSources() const

{

  if (this->AllConfigSources.empty()) {

    this->ComputeAllConfigSources();

  }

  return this->AllConfigSources;

}

void cmGeneratorTarget::ComputeAllConfigSources() const

{

  std::vector<std::string> configs =

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

  std::map<cmSourceFile const*, size_t> index;

  for (size_t ci = 0; ci < configs.size(); ++ci) {

    KindedSources const& sources = this->GetKindedSources(configs[ci]);

    for (SourceAndKind const& src : sources.Sources) {

      auto mi = index.find(src.Source.Value);

      if (mi == index.end()) {

        AllConfigSource acs;

        acs.Source = src.Source.Value;

        acs.Kind = src.Kind;

        this->AllConfigSources.push_back(std::move(acs));

        std::map<cmSourceFile const*, size_t>::value_type entry(

          src.Source.Value, this->AllConfigSources.size() - 1);

        mi = index.insert(entry).first;

      }

      this->AllConfigSources[mi->second].Configs.push_back(ci);

    }

  }

}

std::vector<cmGeneratorTarget::AllConfigSource>

cmGeneratorTarget::GetAllConfigSources(SourceKind kind) const

{

  std::vector<AllConfigSource> result;

  for (AllConfigSource const& source : this->GetAllConfigSources()) {

    if (source.Kind == kind) {

      result.push_back(source);

    }

  }

  return result;

}

void cmGeneratorTarget::ComputeAllConfigCompileLanguages() const

{

  std::set<std::string> languages;

  std::vector<AllConfigSource> const& sources = this->GetAllConfigSources();

  for (AllConfigSource const& si : sources) {

    std::string const& lang = si.Source->GetOrDetermineLanguage();

    if (!lang.empty()) {

      languages.emplace(lang);

    }

  }

  this->AllConfigCompileLanguages = languages;

}

std::set<std::string> cmGeneratorTarget::GetAllConfigCompileLanguages() const

{

  if (this->AllConfigCompileLanguages.empty()) {

    this->ComputeAllConfigCompileLanguages();

  }

  return this->AllConfigCompileLanguages;

}