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

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

#include "cmSourceFile.h"

#include <utility>

#include <cm/string_view>

#include <cmext/string_view>

#include "cmGlobalGenerator.h"

#include "cmList.h"

#include "cmListFileCache.h"

#include "cmMakefile.h"

#include "cmMessageType.h"

#include "cmPolicies.h"

#include "cmProperty.h"

#include "cmState.h"

#include "cmStringAlgorithms.h"

#include "cmSystemTools.h"

#include "cmValue.h"

#include "cmake.h"

cmSourceFile::cmSourceFile(cmMakefile* mf, std::string const& name,

                           bool generated, cmSourceFileLocationKind kind)

  : Location(mf, name, (!generated) ? kind : cmSourceFileLocationKind::Known)

{

  if (generated) {

    this->MarkAsGenerated();

  }

}

void cmSourceFile::SetSpecialSourceType(cmSourceFile::SpecialSourceType type)

{

  this->SpecialSource = type;

}

bool cmSourceFile::IsPchHeader() const

{

  return this->SpecialSource == SpecialSourceType::PchHeader;

}

bool cmSourceFile::IsPchSource() const

{

  return this->SpecialSource == SpecialSourceType::PchSource;

}

std::string const& cmSourceFile::GetExtension() const

{

  return this->Extension;

}

std::string const cmSourceFile::propLANGUAGE = "LANGUAGE";

std::string const cmSourceFile::propLOCATION = "LOCATION";

std::string const cmSourceFile::propGENERATED = "GENERATED";

std::string const cmSourceFile::propCOMPILE_DEFINITIONS =

  "COMPILE_DEFINITIONS";

std::string const cmSourceFile::propCOMPILE_OPTIONS = "COMPILE_OPTIONS";

std::string const cmSourceFile::propINCLUDE_DIRECTORIES =

  "INCLUDE_DIRECTORIES";

void cmSourceFile::SetObjectLibrary(std::string const& objlib)

{

  this->ObjectLibrary = objlib;

}

std::string cmSourceFile::GetObjectLibrary() const

{

  return this->ObjectLibrary;

}

std::string const& cmSourceFile::GetOrDetermineLanguage()

{

  // If the language was set explicitly by the user then use it.

  if (cmValue lang = this->GetProperty(propLANGUAGE)) {

    // Assign to member in order to return a reference.

    this->Language = *lang;

    return this->Language;

  }

  // Perform computation needed to get the language if necessary.

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

    // If a known extension is given or a known full path is given then trust

    // that the current extension is sufficient to determine the language. This

    // will fail only if the user specifies a full path to the source but

    // leaves off the extension, which is kind of weird.

    if (this->FullPath.empty() && this->Location.ExtensionIsAmbiguous() &&

        this->Location.DirectoryIsAmbiguous()) {

      // Finalize the file location to get the extension and set the language.

      this->ResolveFullPath();

    } else {

      // Use the known extension to get the language if possible.

      cm::string_view ext =

        cmSystemTools::GetFilenameLastExtensionView(this->Location.GetName());

      this->CheckLanguage(ext);

    }

  }

  // Use the language determined from the file extension.

  return this->Language;

}

std::string cmSourceFile::GetLanguage() const

{

  // If the language was set explicitly by the user then use it.

  if (cmValue lang = this->GetProperty(propLANGUAGE)) {

    return *lang;

  }

  // Use the language determined from the file extension.

  return this->Language;

}

cmSourceFileLocation const& cmSourceFile::GetLocation() const

{

  return this->Location;

}

std::string const& cmSourceFile::ResolveFullPath(std::string* error,

                                                 std::string* cmp0115Warning)

{

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

    if (this->FindFullPath(error, cmp0115Warning)) {

      this->CheckExtension();

    }

  }

  return this->FullPath;

}

std::string const& cmSourceFile::GetFullPath() const

{

  return this->FullPath;

}

bool cmSourceFile::FindFullPath(std::string* error,

                                std::string* cmp0115Warning)

{

  // If the file is generated compute the location without checking on disk.

  // Note: We also check for a locally set GENERATED property, because

  //       it might have been set before policy CMP0118 (or CMP0163) was set

  //       to NEW.

  if (this->GetIsGenerated(CheckScope::GlobalAndLocal)) {

    // The file is either already a full path or is relative to the

    // build directory for the target.

    this->Location.DirectoryUseBinary();

    this->FullPath = this->Location.GetFullPath();

    this->FindFullPathFailed = false;

    return true;

  }

  // If this method has already failed once do not try again.

  if (this->FindFullPathFailed) {

    return false;

  }

  // The file is not generated.  It must exist on disk.

  cmMakefile const* makefile = this->Location.GetMakefile();

  // Location path

  std::string const& lPath = this->Location.GetFullPath();

  // List of extension lists

  std::vector<std::string> exts =

    makefile->GetCMakeInstance()->GetAllExtensions();

  auto cmp0115 = makefile->GetPolicyStatus(cmPolicies::CMP0115);

  auto cmp0163 = makefile->GetPolicyStatus(cmPolicies::CMP0163);

  auto cmp0118 = makefile->GetPolicyStatus(cmPolicies::CMP0118);

  bool const cmp0163new =

    cmp0163 != cmPolicies::OLD && cmp0163 != cmPolicies::WARN;

  bool const cmp0118new =

    cmp0163new || (cmp0118 != cmPolicies::OLD && cmp0118 != cmPolicies::WARN);

  // Tries to find the file in a given directory

  auto findInDir = [this, &exts, &lPath, cmp0115, cmp0115Warning, cmp0118new,

                    makefile](std::string const& dir) -> bool {

    // Compute full path

    std::string const fullPath = cmSystemTools::CollapseFullPath(lPath, dir);

    // Try full path

    // Is this file globally marked as generated? Then mark so locally.

    if (cmp0118new &&

        makefile->GetGlobalGenerator()->IsGeneratedFile(fullPath)) {

      this->IsGenerated = true;

    }

    if (this->IsGenerated || cmSystemTools::FileExists(fullPath)) {

      this->FullPath = fullPath;

      return true;

    }

    // This has to be an if statement due to a bug in Oracle Developer Studio.

    // See https://community.oracle.com/tech/developers/discussion/4476246/

    // for details.

    if (cmp0115 == cmPolicies::OLD || cmp0115 == cmPolicies::WARN) {

      // Try full path with extension

      for (std::string const& ext : exts) {

        if (!ext.empty()) {

          std::string extPath = cmStrCat(fullPath, '.', ext);

          // Is this file globally marked as generated? Then mark so locally.

          if (cmp0118new &&

              makefile->GetGlobalGenerator()->IsGeneratedFile(extPath)) {

            this->IsGenerated = true;

          }

          if (this->IsGenerated || cmSystemTools::FileExists(extPath)) {

            this->FullPath = extPath;

            if (cmp0115 == cmPolicies::WARN) {

              std::string warning = cmStrCat("File:\n  "_s, extPath);

              if (cmp0115Warning) {

                *cmp0115Warning = std::move(warning);

              } else {

                makefile->IssuePolicyWarning(cmPolicies::CMP0115, {}, warning,

                                             cmListFileBacktrace{});

              }

            }

            return true;

          }

        }

      }

    }

    // File not found

    return false;

  };

  // Try to find the file in various directories

  if (this->Location.DirectoryIsAmbiguous()) {

    if (findInDir(makefile->GetCurrentSourceDirectory()) ||

        findInDir(makefile->GetCurrentBinaryDirectory())) {

      return true;

    }

  } else {

    if (findInDir({})) {

      return true;

    }

  }

  // Compose error

  std::string err = cmStrCat("Cannot find source file:\n  ", lPath);

  switch (cmp0115) {

    case cmPolicies::OLD:

    case cmPolicies::WARN:

      err = cmStrCat(std::move(err), "\nTried extensions");

      for (auto const& ext : exts) {

        err = cmStrCat(std::move(err), " .", ext);

      }

      break;

    case cmPolicies::NEW:

      break;

  }

  if (lPath == "FILE_SET"_s) {

    err += "\nHint: the FILE_SET keyword may only appear after a visibility "

           "specifier or another FILE_SET within the target_sources() "

           "command.";

  }

  if (error) {

    *error = std::move(err);

  } else {

    makefile->IssueMessage(MessageType::FATAL_ERROR, err);

  }

  this->FindFullPathFailed = true;

  // File not found

  return false;

}

void cmSourceFile::CheckExtension()

{

  // Compute the extension.

  cm::string_view realExt =

    cmSystemTools::GetFilenameLastExtensionView(this->FullPath);

  if (!realExt.empty()) {

    // Store the extension without the leading '.'.

    this->Extension = std::string(realExt.substr(1));

  }

  // Look for object files.

  if (this->Extension == "obj" || this->Extension == "o" ||

      this->Extension == "lo") {

    this->SetProperty("EXTERNAL_OBJECT", "1");

  }

  // Try to identify the source file language from the extension.

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

    this->CheckLanguage(this->Extension);

  }

}

void cmSourceFile::CheckLanguage(cm::string_view ext)

{

  // Try to identify the source file language from the extension.

  cmMakefile const* mf = this->Location.GetMakefile();

  cmGlobalGenerator* gg = mf->GetGlobalGenerator();

  cm::string_view l = gg->GetLanguageFromExtension(ext);

  if (!l.empty()) {

    this->Language = std::string(l);

  }

}

bool cmSourceFile::Matches(cmSourceFileLocation const& loc)

{

  return this->Location.Matches(loc);

}

void cmSourceFile::SetProperty(std::string const& prop, cmValue value)

{

  if (prop == propINCLUDE_DIRECTORIES) {

    this->IncludeDirectories.clear();

    if (value) {

      cmListFileBacktrace lfbt = this->Location.GetMakefile()->GetBacktrace();

      this->IncludeDirectories.emplace_back(value, lfbt);

    }

  } else if (prop == propCOMPILE_OPTIONS) {

    this->CompileOptions.clear();

    if (value) {

      cmListFileBacktrace lfbt = this->Location.GetMakefile()->GetBacktrace();

      this->CompileOptions.emplace_back(value, lfbt);

    }

  } else if (prop == propCOMPILE_DEFINITIONS) {

    this->CompileDefinitions.clear();

    if (value) {

      cmListFileBacktrace lfbt = this->Location.GetMakefile()->GetBacktrace();

      this->CompileDefinitions.emplace_back(value, lfbt);

    }

  } else {

    this->Properties.SetProperty(prop, value);

  }

}

void cmSourceFile::AppendProperty(std::string const& prop,

                                  std::string const& value, bool asString)

{

  if (prop == propINCLUDE_DIRECTORIES) {

    if (!value.empty()) {

      cmListFileBacktrace lfbt = this->Location.GetMakefile()->GetBacktrace();

      this->IncludeDirectories.emplace_back(value, lfbt);

    }

  } else if (prop == propCOMPILE_OPTIONS) {

    if (!value.empty()) {

      cmListFileBacktrace lfbt = this->Location.GetMakefile()->GetBacktrace();

      this->CompileOptions.emplace_back(value, lfbt);

    }

  } else if (prop == propCOMPILE_DEFINITIONS) {

    if (!value.empty()) {

      cmListFileBacktrace lfbt = this->Location.GetMakefile()->GetBacktrace();

      this->CompileDefinitions.emplace_back(value, lfbt);

    }

  } else {

    this->Properties.AppendProperty(prop, value, asString);

  }

}

cmValue cmSourceFile::GetPropertyForUser(std::string const& prop)

{

  // This method is a consequence of design history and backwards

  // compatibility.  GetProperty is (and should be) a const method.

  // Computed properties should not be stored back in the property map

  // but instead reference information already known.  If they need to

  // cache information in a mutable ivar to provide the return string

  // safely then so be it.

  //

  // The LOCATION property is particularly problematic.  The CMake

  // language has very loose restrictions on the names that will match

  // a given source file (for historical reasons).  Implementing

  // lookups correctly with such loose naming requires the

  // cmSourceFileLocation class to commit to a particular full path to

  // the source file as late as possible.  If the users requests the

  // LOCATION property we must commit now.

  if (prop == propLOCATION) {

    // Commit to a location.

    this->ResolveFullPath();

  }

  // Similarly, LANGUAGE can be determined by the file extension

  // if it is requested by the user.

  if (prop == propLANGUAGE) {

    // The pointer is valid until `this->Language` is modified.

    return cmValue(this->GetOrDetermineLanguage());

  }

  // Special handling for GENERATED property.

  if (prop == propGENERATED) {

    // We need to check policy CMP0163 and CMP0118 in order to determine if we

    // need to possibly consider the value of a locally set GENERATED property,

    // too.

    auto cmp0163 =

      this->Location.GetMakefile()->GetPolicyStatus(cmPolicies::CMP0163);

    auto cmp0118 =

      this->Location.GetMakefile()->GetPolicyStatus(cmPolicies::CMP0118);

    bool const cmp0163new =

      cmp0163 != cmPolicies::OLD && cmp0163 != cmPolicies::WARN;

    bool const cmp0118new = cmp0163new ||

      (cmp0118 != cmPolicies::OLD && cmp0118 != cmPolicies::WARN);

    if (this->GetIsGenerated((!cmp0118new) ? CheckScope::GlobalAndLocal

                                           : CheckScope::Global)) {

      return cmValue::True;

    }

    return cmValue::False;

  }

  // Perform the normal property lookup.

  return this->GetProperty(prop);

}

cmValue cmSourceFile::GetProperty(std::string const& prop) const

{

  // Check for computed properties.

  if (prop == propLOCATION) {

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

      return nullptr;

    }

    return cmValue(this->FullPath);

  }

  // Check for the properties with backtraces.

  if (prop == propINCLUDE_DIRECTORIES) {

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

      return nullptr;

    }

    static std::string output;

    output = cmList::to_string(this->IncludeDirectories);

    return cmValue(output);

  }

  if (prop == propCOMPILE_OPTIONS) {

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

      return nullptr;

    }

    static std::string output;

    output = cmList::to_string(this->CompileOptions);

    return cmValue(output);

  }

  if (prop == propCOMPILE_DEFINITIONS) {

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

      return nullptr;

    }

    static std::string output;

    output = cmList::to_string(this->CompileDefinitions);

    return cmValue(output);

  }

  cmValue retVal = this->Properties.GetPropertyValue(prop);

  if (!retVal) {

    cmMakefile const* mf = this->Location.GetMakefile();

    bool const chain =

      mf->GetState()->IsPropertyChained(prop, cmProperty::SOURCE_FILE);

    if (chain) {

      return mf->GetProperty(prop, chain);

    }

    return nullptr;

  }

  return retVal;

}

std::string const& cmSourceFile::GetSafeProperty(std::string const& prop) const

{

  cmValue ret = this->GetProperty(prop);

  if (ret) {

    return *ret;

  }

  static std::string const s_empty;

  return s_empty;

}

bool cmSourceFile::GetPropertyAsBool(std::string const& prop) const

{

  return this->GetProperty(prop).IsOn();

}

void cmSourceFile::MarkAsGenerated()

{

  this->IsGenerated = true;

  auto const& mf = *this->Location.GetMakefile();

  mf.GetGlobalGenerator()->MarkAsGeneratedFile(this->ResolveFullPath());

}

bool cmSourceFile::GetIsGenerated(CheckScope checkScope) const

{

  if (this->IsGenerated) {

    // Globally marked as generated!

    return true;

  }

  if (checkScope == CheckScope::GlobalAndLocal) {

    // Check locally stored properties.

    return this->GetPropertyAsBool(propGENERATED);

  }

  return false;

}

void cmSourceFile::SetProperties(cmPropertyMap properties)

{

  this->Properties = std::move(properties);

}

cmCustomCommand* cmSourceFile::GetCustomCommand() const

{

  return this->CustomCommand.get();

}

void cmSourceFile::SetCustomCommand(std::unique_ptr<cmCustomCommand> cc)

{

  this->CustomCommand = std::move(cc);

}

cmValue cmSourceFile::GetRustEmitProperty() const

{

  static std::string const s_default = "link";

  cmValue const value = this->GetProperty("Rust_EMIT");

  if (!value || value->empty()) {

    return cmValue(s_default);

  }

  return value;

}