Function GetSourceFile

Source/cmGeneratorExpressionNode.cxx:3705–3765

namespace {
bool GetSourceFile(
  cmRange<std::vector<std::string>::const_iterator> parameters,
  cm::GenEx::Evaluation* eval, GeneratorExpressionContent const* content,
  cmSourceFile*& sourceFile)
{
  auto sourceName = *parameters.begin();
  auto* makefile = eval->Context.LG->GetMakefile();
  sourceFile = nullptr;

  if (parameters.size() == 2) {
    auto const& option = *parameters.advance(1).begin();
    auto const DIRECTORY = "DIRECTORY:"_s;
    auto const TARGET_DIRECTORY = "TARGET_DIRECTORY:"_s;
    if (cmHasPrefix(option, DIRECTORY)) {
      auto dir = option.substr(DIRECTORY.length());
      if (dir.empty()) {
        reportError(
          eval, content->GetOriginalExpression(),
          cmStrCat("No value provided for the ", DIRECTORY, " option."));
        return false;
      }
      dir = cmSystemTools::CollapseFullPath(
        dir, makefile->GetCurrentSourceDirectory());
      makefile = makefile->GetGlobalGenerator()->FindMakefile(dir);
      if (!makefile) {
        reportError(
          eval, content->GetOriginalExpression(),
          cmStrCat("Directory \"", dir, "\" is not known from CMake."));
        return false;
      }
    } else if (cmHasPrefix(option, TARGET_DIRECTORY)) {
      auto targetName = option.substr(TARGET_DIRECTORY.length());
      if (targetName.empty()) {
        reportError(eval, content->GetOriginalExpression(),
                    cmStrCat("No value provided for the ", TARGET_DIRECTORY,
                             " option."));
        return false;
      }
      auto* target = makefile->FindTargetToUse(targetName);
      if (!target) {
        reportError(eval, content->GetOriginalExpression(),
                    cmStrCat("Non-existent target: ", targetName));
        return false;
      }
      makefile = makefile->GetGlobalGenerator()->FindMakefile(
        target->GetProperty("BINARY_DIR"));
    } else {
      reportError(eval, content->GetOriginalExpression(),
                  cmStrCat("Invalid option. ", DIRECTORY, " or ",
                           TARGET_DIRECTORY, " expected."));
      return false;
    }

    sourceName = cmSystemTools::CollapseFullPath(
      sourceName,
      eval->Context.LG->GetMakefile()->GetCurrentSourceDirectory());
  }