root: macro: factor out common code into utility

container/src/root/macro/common/utility.hh

@@ -24,6 +24,8 @@
 #define CONTAINER_SRC_ROOT_MACRO_COMMON_UTILITY_HH_
 
 #include <ctime>
+#include <initializer_list>
+#include <iostream>
 #include <string>
 #include <vector>
 
@@ -41,6 +43,47 @@ namespace macro
 //! \since docker-finance 1.0.0
 namespace internal
 {
+//! \brief Wrapper to ROOT Cling commands
+//! \ingroup cpp_macro_impl
+//! \since docker-finance 1.0.0
+class Command final
+{
+ public:
+  Command() = default;
+  ~Command() = default;
+
+  Command(const Command&) = default;
+  Command& operator=(const Command&) = default;
+
+  Command(Command&&) = default;
+  Command& operator=(Command&&) = default;
+
+ private:
+  static void cmd_handler(const std::initializer_list<std::string>& command)
+  {
+    for (const auto& cmd : command)
+      {
+        std::cout << "Interpreting: '" << cmd << "'" << std::endl;
+        gInterpreter->ProcessLine(cmd.c_str());
+      }
+  }
+
+ public:
+  //! \brief Load given file path
+  static void load(const std::string& path)
+  {
+    std::string cmd{".L ./" + path};
+    Command::cmd_handler({cmd});
+  }
+
+  //! \brief Load given file paths
+  static void load(const std::initializer_list<std::string>& commands)
+  {
+    for (const auto& cmd : commands)
+      Command::load(cmd);
+  }
+};
+
 //! \namespace docker_finance::macro::internal::utility
 //! \brief To help grease the wheels of the machine
 //! \since docker-finance 1.0.0
@@ -71,6 +114,37 @@ std::string make_timestamp()
 }
 }  // namespace utility
 }  // namespace internal
+
+//! \brief Load file by path
+//! \ingroup cpp_macro
+//! \details
+//!   Example:
+//!     <br>&emsp; root [0] docker_finance::macro::load("test/test.C")<br>
+//!
+//!   Will load:
+//!     <br>&emsp; root/macro/test/test.C<br>
+//!
+//! \note  Parent directory is `root/macro`
+void load(const std::string& path)
+{
+  internal::Command::load(path);
+}
+
+//! \brief Wrapper to load files by list of paths
+//! \ingroup cpp_macro
+//! \details
+//!   Example:
+//!     <br>&emsp; root [0] docker_finance::macro::load({"test/test.C", "../src/hash.hh"})<br>
+//!
+//!   Will load:
+//!     <br>&emsp; root/macro/test/test.C and root/src/hash.hh<br>
+//!
+//! \note  Parent directory is `root/macro`
+void load(const std::initializer_list<std::string>& paths)
+{
+  for (const auto& path : paths)
+    internal::Command::load(path);
+}
 }  // namespace macro
 }  // namespace docker_finance