Function AddCustomCommand

Source/cmLocalGenerator.cxx:4971–5044

}

cmSourceFile* AddCustomCommand(cmLocalGenerator& lg, cmCommandOrigin origin,
                               std::unique_ptr<cmCustomCommand> cc,
                               bool replace)
{
  cmMakefile* mf = lg.GetMakefile();
  auto const& lfbt = cc->GetBacktrace();
  auto const& outputs = cc->GetOutputs();
  auto const& byproducts = cc->GetByproducts();
  auto const& commandLines = cc->GetCommandLines();

  // Choose a source file on which to store the custom command.
  cmSourceFile* file = nullptr;
  if (!commandLines.empty() && cc->HasMainDependency()) {
    auto const& main_dependency = cc->GetMainDependency();
    // The main dependency was specified.  Use it unless a different
    // custom command already used it.
    file = mf->GetSource(main_dependency);
    if (file && file->GetCustomCommand() && !replace) {
      // The main dependency already has a custom command.
      if (commandLines == file->GetCustomCommand()->GetCommandLines()) {
        // The existing custom command is identical.  Silently ignore
        // the duplicate.
        return file;
      }
      // The existing custom command is different.  We need to
      // generate a rule file for this new command.
      file = nullptr;
    } else if (!file) {
      file = mf->CreateSource(main_dependency);
    }
  }

  // Generate a rule file if the main dependency is not available.
  if (!file) {
    cmGlobalGenerator* gg = lg.GetGlobalGenerator();

    // Construct a rule file associated with the first output produced.
    std::string outName = gg->GenerateRuleFile(
      ComputeCustomCommandRuleFileName(lg, lfbt, outputs[0]));

    // Check if the rule file already exists.
    file = mf->GetSource(outName, cmSourceFileLocationKind::Known);
    if (file && file->GetCustomCommand() && !replace) {
      // The rule file already exists.
      if (commandLines != file->GetCustomCommand()->GetCommandLines()) {
        lg.GetCMakeInstance()->IssueMessage(
          MessageType::FATAL_ERROR,
          cmStrCat("Attempt to add a custom rule to output\n  ", outName,
                   "\nwhich already has a custom rule."),
          lfbt);
      }
      return file;
    }

    // Create a cmSourceFile for the rule file.
    if (!file) {
      file = mf->CreateSource(outName, true, cmSourceFileLocationKind::Known);
    }