From 8a0d16b8f59dd1c9d75045aa016d9ce235257311 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Urs=20F=C3=A4ssler?= <urs.fassler@bitzgi.ch>
Date: Thu, 28 Dec 2023 17:28:24 +0100
Subject: [PATCH] add version info to cucumber-cpp-main

---
 cmake/modules/GitVersion.cmake | 29 +++++++++++++++++++++++++++++
 src/CMakeLists.txt             |  7 +++++++
 src/main.cpp                   |  6 ++++++
 3 files changed, 42 insertions(+)
 create mode 100644 cmake/modules/GitVersion.cmake

diff --git a/cmake/modules/GitVersion.cmake b/cmake/modules/GitVersion.cmake
new file mode 100644
index 00000000..b5c4e756
--- /dev/null
+++ b/cmake/modules/GitVersion.cmake
@@ -0,0 +1,29 @@
+function(git_get_version VERSION_VARIABLE)
+    find_program(GIT_EXECUTABLE git)
+
+    if(NOT GIT_EXECUTABLE)
+        message(FATAL_ERROR "Git not found. Please install Git and make sure it is in your system's PATH.")
+    endif()
+
+    execute_process(
+        COMMAND ${GIT_EXECUTABLE} describe --always --dirty
+        OUTPUT_VARIABLE VERSION_STRING
+        OUTPUT_STRIP_TRAILING_WHITESPACE
+        WORKING_DIRECTORY "${PROJECT_SOURCE_DIR}"
+        ERROR_VARIABLE GIT_DESCRIBE_ERROR
+        RESULT_VARIABLE GIT_DESCRIBE_RESULT
+    )
+
+    if(NOT GIT_DESCRIBE_RESULT EQUAL 0)
+        message(FATAL_ERROR "Error running 'git describe': ${GIT_DESCRIBE_ERROR}")
+    endif()
+
+    string(LENGTH "${VERSION_STRING}" VERSION_STRING_LENGTH)
+    string(SUBSTRING "${VERSION_STRING}" 0 1 FIRST_CHARACTER)
+
+    if("${FIRST_CHARACTER}" STREQUAL "v")
+        string(SUBSTRING "${VERSION_STRING}" 1 ${VERSION_STRING_LENGTH} VERSION_STRING)
+    endif()
+
+    set(${VERSION_VARIABLE} ${VERSION_STRING} PARENT_SCOPE)
+endfunction()
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 547a5078..3579e695 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,6 +1,7 @@
 include(GenerateExportHeader)
 
 find_package(nlohmann_json 3.10.5 REQUIRED)
+include(../cmake/modules/GitVersion.cmake)
 
 set(CUKE_SOURCES
     drivers/GenericDriver.cpp
@@ -123,6 +124,12 @@ foreach(TARGET
     endif(MINGW)
 endforeach()
 
+git_get_version(CUKE_VERSION)
+message(STATUS "Version: ${CUKE_VERSION}")
+target_compile_definitions(cucumber-cpp PRIVATE
+    CUKE_VERSION="${CUKE_VERSION}"
+)
+
 target_link_libraries(cucumber-cpp
     PRIVATE
         Boost::program_options
diff --git a/src/main.cpp b/src/main.cpp
index 18656715..44031d1f 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -47,6 +47,7 @@ int CUCUMBER_CPP_EXPORT main(int argc, char** argv) {
     boost::program_options::options_description optionDescription("Allowed options");
     optionDescription.add_options()("help,h", "help for cucumber-cpp")(
         "verbose,v", "verbose output"
+    )("version", "version of cucumber-cpp"
     )("listen,l", value<std::string>(), "listening address of wireserver"
     )("port,p",
       value<int>(),
@@ -68,6 +69,11 @@ int CUCUMBER_CPP_EXPORT main(int argc, char** argv) {
         exit(1);
     }
 
+    if (optionVariableMap.count("version")) {
+        std::cout << CUKE_VERSION << std::endl;
+        exit(0);
+    }
+
     std::string listenHost("127.0.0.1");
     if (optionVariableMap.count("listen")) {
         listenHost = optionVariableMap["listen"].as<std::string>();