From 75921c438620e3361c17479baef28ebbb58bcc95 Mon Sep 17 00:00:00 2001
From: matt <matthilton2005@gmail.com>
Date: Wed, 18 Aug 2021 23:43:22 +0100
Subject: [PATCH] Added gitversion,cmake and last commit epoch as patch version

---
 CMakeLists.txt                 | 18 +++++++-----
 aasdk_proto/CMakeLists.txt     |  6 ++--
 cmake_modules/gitversion.cmake | 51 ++++++++++++++++++++++++++++++++++
 3 files changed, 65 insertions(+), 10 deletions(-)
 create mode 100644 cmake_modules/gitversion.cmake

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8309bc0..4d69865 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,10 +1,10 @@
 cmake_minimum_required(VERSION 3.5.1)
 
-set (AASDK_VERSION_MAJOR 2)
-set (AASDK_VERSION_MINOR 1)
-set (AASDK_VERSION_PATCH 0)
+set (aasdk_VERSION_MAJOR 2)
+set (aasdk_VERSION_MINOR 1)
+set (aasdk_VERSION_PATCH 0)
 project(aasdk
-VERSION ${AASDK_VERSION_MAJOR}.${AASDK_VERSION_MINOR}.${AASDK_VERSION_PATCH}
+VERSION ${aasdk_VERSION_MAJOR}.${aasdk_VERSION_MINOR}.${aasdk_VERSION_PATCH}
 LANGUAGES CXX)
 
 find_program(CCACHE_PROGRAM ccache)
@@ -36,6 +36,10 @@ set(Boost_USE_STATIC_RUNTIME OFF)
 
 add_definitions(-DBOOST_ALL_DYN_LINK)
 
+include(${base_directory}/cmake_modules/gitversion.cmake)
+set (aasdk_VERSION_PATCH ${_commit_timestamp})
+set (CMAKE_PROJECT_VERSION_PATCH ${aasdk_VERSION_PATCH})
+
 if(WIN32)
     set(WINSOCK2_LIBRARIES "ws2_32")
 endif(WIN32)
@@ -82,9 +86,9 @@ target_link_libraries(aasdk
                         ${OPENSSL_LIBRARIES}
                         ${WINSOCK2_LIBRARIES})
 
-set(AASDK_VERSION_STRING ${AASDK_VERSION_MAJOR}.${AASDK_VERSION_MINOR}.${AASDK_VERSION_PATCH})
-set_target_properties(aasdk PROPERTIES VERSION ${AASDK_VERSION_STRING}
-                                          SOVERSION ${AASDK_VERSION_MAJOR})
+set(aasdk_VERSION_STRING ${aasdk_VERSION_MAJOR}.${aasdk_VERSION_MINOR}.${aasdk_VERSION_PATCH})
+set_target_properties(aasdk PROPERTIES VERSION ${aasdk_VERSION_STRING}
+                                          SOVERSION ${aasdk_VERSION_MAJOR})
 
 install(TARGETS aasdk DESTINATION lib COMPONENT libraries)
 install(DIRECTORY include/aasdk DESTINATION include COMPONENT headers)
diff --git a/aasdk_proto/CMakeLists.txt b/aasdk_proto/CMakeLists.txt
index f050119..4c0d40f 100644
--- a/aasdk_proto/CMakeLists.txt
+++ b/aasdk_proto/CMakeLists.txt
@@ -7,9 +7,9 @@ protobuf_generate_cpp(proto_sources proto_headers ${proto_files})
 add_library(aasdk_proto SHARED ${proto_headers} ${proto_sources})
 target_link_libraries(aasdk_proto ${PROTOBUF_LIBRARIES})
 
-set(AASDK_VERSION_STRING ${AASDK_VERSION_MAJOR}.${AASDK_VERSION_MINOR}.${AASDK_VERSION_PATCH})
-set_target_properties(aasdk_proto PROPERTIES VERSION ${AASDK_VERSION_STRING}
-                                          SOVERSION ${AASDK_VERSION_MAJOR})
+set(aasdk_VERSION_STRING ${aasdk_VERSION_MAJOR}.${aasdk_VERSION_MINOR}.${aasdk_VERSION_PATCH})
+set_target_properties(aasdk_proto PROPERTIES VERSION ${aasdk_VERSION_STRING}
+                                          SOVERSION ${aasdk_VERSION_MAJOR})
 
 install(TARGETS aasdk_proto DESTINATION lib)
 install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR} DESTINATION include
diff --git a/cmake_modules/gitversion.cmake b/cmake_modules/gitversion.cmake
new file mode 100644
index 0000000..b3267b5
--- /dev/null
+++ b/cmake_modules/gitversion.cmake
@@ -0,0 +1,51 @@
+# cmake/gitversion.cmake
+cmake_minimum_required(VERSION 3.0.0)
+
+message(STATUS "Resolving GIT Version")
+
+set(_build_version "unknown")
+set(_commit_timestamp "unknown")
+
+find_package(Git)
+if(GIT_FOUND)
+  execute_process(
+    COMMAND ${GIT_EXECUTABLE} rev-parse --short HEAD
+    WORKING_DIRECTORY "${local_dir}"
+    OUTPUT_VARIABLE _build_version
+    ERROR_QUIET
+    OUTPUT_STRIP_TRAILING_WHITESPACE
+  )
+  execute_process(
+    COMMAND ${GIT_EXECUTABLE} rev-parse --abbrev-ref HEAD
+    WORKING_DIRECTORY "${local_dir}"
+    OUTPUT_VARIABLE _build_branch
+    ERROR_QUIET
+    OUTPUT_STRIP_TRAILING_WHITESPACE
+  )
+  execute_process(
+    COMMAND ${GIT_EXECUTABLE} log -1 --format=%at
+    WORKING_DIRECTORY "${local_dir}"
+    OUTPUT_VARIABLE _commit_timestamp
+    ERROR_QUIET
+    OUTPUT_STRIP_TRAILING_WHITESPACE
+  )
+  message( STATUS "GIT hash: ${_build_version}; branch: ${_build_branch}; Commit epoch: ${_commit_timestamp};")
+  execute_process(
+  	COMMAND ${GIT_EXECUTABLE} diff --no-ext-diff --quiet
+    WORKING_DIRECTORY "${local_dir}"
+  	RESULT_VARIABLE ret
+  )
+  if(ret EQUAL "1")
+    set(_build_changes "*")
+  else()
+    set(_build_changes "")
+  endif()
+
+else()
+  message(STATUS "GIT not found")
+endif()
+
+# branch name
+# git rev-parse --abbrev-ref HEAD
+# changed
+# git diff --no-ext-diff --quiet