From 38b1b8114e5d31018eed23210ea639a5ea881ccc Mon Sep 17 00:00:00 2001
From: Oliver 'kfsone' Smith <oliver@kfs.org>
Date: Fri, 4 Jun 2021 16:48:15 -0700
Subject: [PATCH] Allow user to limit version argument to --version

---
 CMakeLists.txt                | 5 +++++
 include/argparse/argparse.hpp | 4 ++++
 2 files changed, 9 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2dcb31a..6b60907 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,12 +1,17 @@
 cmake_minimum_required(VERSION 3.8)
 project(argparse VERSION 1.0.0 LANGUAGES CXX)
 option(ARGPARSE_BUILD_TESTS OFF)
+option(ARGPARSE_LONG_VERSION_ARG_ONLY OFF)
 
 include(GNUInstallDirs)
 
 add_library(argparse INTERFACE)
 add_library(argparse::argparse ALIAS argparse)
 
+if (ARGPARSE_LONG_VERSION_ARG_ONLY)
+	target_compile_definitions(argparse INTERFACE ARGPARSE_LONG_VERSION_ARG_ONLY=true)
+endif ()
+
 target_compile_features(argparse INTERFACE cxx_std_17)
 target_include_directories(argparse INTERFACE
   $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
diff --git a/include/argparse/argparse.hpp b/include/argparse/argparse.hpp
index 424731f..ad8d8be 100644
--- a/include/argparse/argparse.hpp
+++ b/include/argparse/argparse.hpp
@@ -815,7 +815,11 @@ public:
                           std::string aVersion = "1.0")
       : mProgramName(std::move(aProgramName)), mVersion(std::move(aVersion)) {
     add_argument("-h", "--help").help("shows help message and exits").nargs(0);
+#ifndef ARGPARSE_LONG_VERSION_ARG_ONLY
     add_argument("-v", "--version")
+#else
+	add_argument("--version")
+#endif
         .help("prints version information and exits")
         .nargs(0);
   }