urdf_config.cpp

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#include <moveit_setup_framework/data/urdf_config.hpp>
#include <moveit_setup_framework/utilities.hpp>
#include <moveit/rdf_loader/rdf_loader.h>
#include <fmt/format.h>
 
namespace moveit_setup
{
void URDFConfig::onInit()
{
  parent_node_->declare_parameter("robot_description", rclcpp::ParameterType::PARAMETER_STRING);
}
 
void URDFConfig::loadPrevious(const std::filesystem::path& /*config_package_path*/, const YAML::Node& node)
{
  if (!getYamlProperty(node, "package", urdf_pkg_name_))
  {
    throw std::runtime_error("cannot find package property in URDF");
  }
 
  if (!getYamlProperty(node, "relative_path", urdf_pkg_relative_path_))
  {
    throw std::runtime_error("cannot find relative_path property in URDF");
  }
 
  getYamlProperty(node, "xacro_args", xacro_args_);
  loadFromPackage(urdf_pkg_name_, urdf_pkg_relative_path_, xacro_args_);
}
 
YAML::Node URDFConfig::saveToYaml() const
{
  YAML::Node node;
  node["package"] = urdf_pkg_name_;
  node["relative_path"] = urdf_pkg_relative_path_.string();
  if (!xacro_args_.empty())
  {
    node["xacro_args"] = xacro_args_;
  }
  return node;
}
 
void URDFConfig::loadFromPath(const std::filesystem::path& urdf_file_path, const std::string& xacro_args)
{
  urdf_path_ = urdf_file_path;
  xacro_args_ = xacro_args;
  xacro_args_vec_ = { xacro_args_ };
  setPackageName();
  load();
}
 
void URDFConfig::loadFromPath(const std::filesystem::path& urdf_file_path, const std::vector<std::string>& xacro_args)
{
  urdf_path_ = urdf_file_path;
  xacro_args_vec_ = xacro_args;
  xacro_args_ = fmt::format("{}", fmt::join(xacro_args_vec_, " "));
  setPackageName();
  load();
}
 
void URDFConfig::setPackageName()
{
  // Reset to defaults: no package name, relative path is set to absolute path
  urdf_pkg_name_ = "";
  urdf_pkg_relative_path_ = urdf_path_;
 
  std::string pkg_name;
  std::filesystem::path relative_path;
  if (extractPackageNameFromPath(urdf_path_, pkg_name, relative_path))
  {
    // Check that ROS can find the package, update members accordingly
    const std::filesystem::path robot_desc_pkg_path = getSharePath(pkg_name);
    if (!robot_desc_pkg_path.empty())
    {
      urdf_pkg_name_ = pkg_name;
      urdf_pkg_relative_path_ = relative_path;
    }
    else
    {
      RCLCPP_WARN(*logger_,
                  "Found package name '%s' but failed to resolve ROS package path."
                  "Attempting to load the URDF from absolute path, instead.",
                  pkg_name.c_str());
    }
  }
}
 
void URDFConfig::loadFromPackage(const std::filesystem::path& package_name, const std::filesystem::path& relative_path,
                                 const std::string& xacro_args)
{
  const std::filesystem::path package_path = getSharePath(package_name);
  if (package_path.empty())
  {
    throw std::runtime_error("URDF/COLLADA package not found: ''" + package_name.string());
  }
 
  urdf_pkg_name_ = package_name;
  urdf_pkg_relative_path_ = relative_path;
  xacro_args_ = xacro_args;
 
  urdf_path_ = package_path / relative_path;
  load();
}
 
void URDFConfig::load()
{
  RCLCPP_DEBUG_STREAM(*logger_, "URDF Package Name: " << urdf_pkg_name_);
  RCLCPP_DEBUG_STREAM(*logger_, "URDF Package Path: " << urdf_pkg_relative_path_);
 
  if (!rdf_loader::RDFLoader::loadXmlFileToString(urdf_string_, urdf_path_, xacro_args_vec_))
  {
    throw std::runtime_error("URDF/COLLADA file not found: " + urdf_path_.string());
  }
 
  if (urdf_string_.empty() && rdf_loader::RDFLoader::isXacroFile(urdf_path_))
  {
    throw std::runtime_error("Running xacro failed.\nPlease check console for errors.");
  }
 
  // Verify that file is in correct format / not an XACRO by loading into robot model
  if (!urdf_model_->initString(urdf_string_))
  {
    throw std::runtime_error("URDF/COLLADA file is not a valid robot model.");
  }
  urdf_from_xacro_ = rdf_loader::RDFLoader::isXacroFile(urdf_path_);
 
  // Set parameter
  parent_node_->set_parameter(rclcpp::Parameter("robot_description", urdf_string_));
 
  RCLCPP_INFO_STREAM(*logger_, "Loaded " << urdf_model_->getName() << " robot model.");
}
 
bool URDFConfig::isXacroFile() const
{
  return rdf_loader::RDFLoader::isXacroFile(urdf_path_);
}
 
bool URDFConfig::isConfigured() const
{
  return urdf_model_->getRoot() != nullptr;
}
 
void URDFConfig::collectDependencies(std::set<std::string>& packages) const
{
  packages.insert(urdf_pkg_name_);
}
 
void URDFConfig::collectVariables(std::vector<TemplateVariable>& variables)
{
  std::string urdf_location;
  if (urdf_pkg_name_.empty())
  {
    urdf_location = urdf_path_;
  }
  else
  {
    urdf_location = "$(find " + urdf_pkg_name_ + ")/" + urdf_pkg_relative_path_.string();
  }
 
  variables.push_back(TemplateVariable("URDF_LOCATION", urdf_location));
 
  if (urdf_from_xacro_)
  {
    variables.push_back(
        TemplateVariable("URDF_LOAD_ATTRIBUTE", "command=\"xacro " + xacro_args_ + " '" + urdf_location + "'\""));
  }
  else
  {
    variables.push_back(TemplateVariable("URDF_LOAD_ATTRIBUTE", "textfile=\"" + urdf_location + "\""));
  }
}
}  // namespace moveit_setup
 
#include <pluginlib/class_list_macros.hpp>  // NOLINT
PLUGINLIB_EXPORT_CLASS(moveit_setup::URDFConfig, moveit_setup::SetupConfig)