From 0d43936a6102ba8dc3c1fcb7e3b5bdc4416aa447 Mon Sep 17 00:00:00 2001
From: Michael Mandl <mandlm@molez.net>
Date: Wed, 11 Oct 2023 20:49:32 +0200
Subject: [PATCH] feat: add version header

---
 CMakeLists.txt       | 19 +++++++++----------
 include/version.h.in |  8 ++++++++
 src/main.cpp         |  8 ++++++--
 3 files changed, 23 insertions(+), 12 deletions(-)
 create mode 100644 include/version.h.in

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9d24d76..d5d4657 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,21 +2,20 @@ cmake_minimum_required(VERSION 3.20)
 
 project(
   hello
-  VERSION 0.1
+  VERSION 0.1.0
   LANGUAGES CXX)
 
-set(SOURCES src/main.cpp)
-
-set(CMAKE_CXX_STANDARD 20)
-set(CMAKE_CXX_STANDARD_REQUIRED ON)
-
-set(CMAKE_EXPORT_COMPILE_COMMANDS
-    ON
-    CACHE INTERNAL "")
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
 if(CMAKE_EXPORT_COMPILE_COMMANDS)
   set(CMAKE_CXX_STANDARD_INCLUDE_DIRECTORIES
       ${CMAKE_CXX_IMPLICIT_INCLUDE_DIRECTORIES})
 endif()
 
-add_executable(hello ${SOURCES})
+configure_file("${PROJECT_SOURCE_DIR}/include/version.h.in"
+               "${PROJECT_BINARY_DIR}/include/version.h")
+
+add_executable(hello src/main.cpp)
+target_compile_features(hello PUBLIC cxx_std_20)
+
+target_include_directories(hello PRIVATE "${PROJECT_BINARY_DIR}/include")
diff --git a/include/version.h.in b/include/version.h.in
new file mode 100644
index 0000000..b7e9740
--- /dev/null
+++ b/include/version.h.in
@@ -0,0 +1,8 @@
+#pragma once
+
+#define VERSION_MAJOR @PROJECT_VERSION_MAJOR@
+#define VERSION_MINOR @PROJECT_VERSION_MINOR@
+#define VERSION_PATCH @PROJECT_VERSION_PATCH@
+#define VERSION_TWEAK @PROJECT_VERSION_TWEAK@
+
+#define VERSION "@PROJECT_VERSION@"
diff --git a/src/main.cpp b/src/main.cpp
index ce56794..36a4aa5 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,6 +1,10 @@
+#include <cstdlib>
 #include <iostream>
 
+#include "version.h"
+
 int main(int argc, char **argv) {
-  std::cout << "Hello" << std::endl;
-  return 0;
+  std::cout << "Hello, world! Version " << VERSION << std::endl;
+
+  return EXIT_SUCCESS;
 }