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/*============================================================================
  CMake - Cross Platform Makefile Generator
  Copyright 2000-2009 Kitware, Inc., Insight Software Consortium

  Distributed under the OSI-approved BSD License (the "License");
  see accompanying file Copyright.txt for details.

  This software is distributed WITHOUT ANY WARRANTY; without even the
  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  See the License for more information.
============================================================================*/
#include "cmSourceGroupCommand.h"

// cmSourceGroupCommand
bool cmSourceGroupCommand::InitialPass(std::vector<std::string> const& args,
                                       cmExecutionStatus&)
{
  if (args.empty()) {
    this->SetError("called with incorrect number of arguments");
    return false;
  }

  std::string delimiter = "\\";
  if (this->Makefile->GetDefinition("SOURCE_GROUP_DELIMITER")) {
    delimiter = this->Makefile->GetDefinition("SOURCE_GROUP_DELIMITER");
  }

  std::vector<std::string> folders =
    cmSystemTools::tokenize(args[0], delimiter);

  cmSourceGroup* sg = CM_NULLPTR;
  sg = this->Makefile->GetSourceGroup(folders);
  if (!sg) {
    this->Makefile->AddSourceGroup(folders);
    sg = this->Makefile->GetSourceGroup(folders);
  }

  if (!sg) {
    this->SetError("Could not create or find source group");
    return false;
  }
  // If only two arguments are given, the pre-1.8 version of the
  // command is being invoked.
  if (args.size() == 2 && args[1] != "FILES") {
    sg->SetGroupRegex(args[1].c_str());
    return true;
  }

  // Process arguments.
  bool doingFiles = false;
  for (unsigned int i = 1; i < args.size(); ++i) {
    if (args[i] == "REGULAR_EXPRESSION") {
      // Next argument must specify the regex.
      if (i + 1 < args.size()) {
        ++i;
        sg->SetGroupRegex(args[i].c_str());
      } else {
        this->SetError("REGULAR_EXPRESSION argument given without a regex.");
        return false;
      }
      doingFiles = false;
    } else if (args[i] == "FILES") {
      // Next arguments will specify files.
      doingFiles = true;
    } else if (doingFiles) {
      // Convert name to full path and add to the group's list.
      std::string src = args[i];
      if (!cmSystemTools::FileIsFullPath(src.c_str())) {
        src = this->Makefile->GetCurrentSourceDirectory();
        src += "/";
        src += args[i];
      }
      src = cmSystemTools::CollapseFullPath(src.c_str());
      sg->AddGroupFile(src);
    } else {
      std::ostringstream err;
      err << "Unknown argument \"" << args[i] << "\".  "
          << "Perhaps the FILES keyword is missing.\n";
      this->SetError(err.str());
      return false;
    }
  }

  return true;
}