build: Export Git Version Information

If building a specific git commit, try to export that
information.

fixes: FairRootGroup#1076

CHANGELOG.md

@@ -37,6 +37,9 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
     use the standard `configure_file` CMake command.
   * Alternatively consider creating a proper CMake Package with
     `configure_package_config_file()`, and `write_basic_package_version_file()`.
+  * If you need the "git version", use
+    [`fair_get_git_version()` from FairCMakeModules](https://fairrootgroup.github.io/FairCMakeModules/latest/module/FairProjectConfig.html#fair-get-git-version)
+    in addition.
 * Renamed our `ROOT_GENERATE_DICTIONARY` to `FAIRROOT_GENERATE_DICTIONARY`.
   (It's not used in many places anyway, it seems.)
 * The following files have been deleted. As far as we know they were not used anywhere:

CMakeLists.txt

@@ -79,6 +79,10 @@ find_package(FairCMakeModules 0.2 QUIET REQUIRED)
 include(FairFindPackage2)
 include(FairFormattedOutput)
 include(FairSummary)
+if(FairCMakeModules_VERSION VERSION_GREATER_EQUAL 1.0.0)
+  include(FairProjectConfig)
+endif()
+
 include(FairRootTargets)
 include(FairRootPackage)
 include(FairRootSummary)
@@ -87,6 +91,10 @@ include(WriteConfigFile)
 include(Dart)
 include(CheckCompiler)
 
+if(FairCMakeModules_VERSION VERSION_GREATER_EQUAL 1.0.0)
+  fair_get_git_version()
+endif()
+
 set(LIBRARY_OUTPUT_PATH "${CMAKE_BINARY_DIR}/lib")
 
 

cmake/modules/FindFairRoot.cmake

@@ -1,5 +1,5 @@
  ################################################################################
- # Copyright (C) 2014-2022 GSI Helmholtzzentrum fuer Schwerionenforschung GmbH  #
+ # Copyright (C) 2014-2023 GSI Helmholtzzentrum fuer Schwerionenforschung GmbH  #
  #                                                                              #
  #              This software is distributed under the terms of the             # 
  #              GNU Lesser General Public Licence (LGPL) version 3,             #  
@@ -34,6 +34,9 @@ set(FAIRROOTPATH "${FairRoot_PREFIX}")
 
 MESSAGE(STATUS "Setting FairRoot environment:")
 message(STATUS "  FairRoot Version           : ${FairRoot_VERSION}")
+if(FairRoot_GIT_VERSION)
+  message(STATUS "  FairRoot Version (Git)     : ${FairRoot_GIT_VERSION}")
+endif()
 message(STATUS "  FairRoot CXX Standard      : ${FairRoot_CXX_STANDARD}")
 message(STATUS "  FairRoot prefix            : ${FairRoot_PREFIX}")
 

cmake/private/FairRootConfig.cmake.in

@@ -10,6 +10,7 @@
 
 set_and_check(@PROJECT_NAME@_PREFIX "@PACKAGE_CMAKE_INSTALL_PREFIX@")
 set(@PROJECT_NAME@_BINDIR "@PACKAGE_CMAKE_INSTALL_FULL_BINDIR@")
+set(@PROJECT_NAME@_GIT_VERSION "@PROJECT_GIT_VERSION@")
 set(@PROJECT_NAME@_CXX_STANDARD "@CMAKE_CXX_STANDARD@")
 
 check_required_components(@PROJECT_NAME@)

doxygen/doxyfile.in

@@ -5,7 +5,7 @@
 #---------------------------------------------------------------------------
 DOXYFILE_ENCODING      = UTF-8
 PROJECT_NAME           = @DOXYGEN_PROJECT_NAME@
-PROJECT_NUMBER         = @PROJECT_VERSION@
+PROJECT_NUMBER         = @PROJECT_VERSION@ (@PROJECT_GIT_VERSION@)
 PROJECT_BRIEF          =
 PROJECT_LOGO           =
 OUTPUT_DIRECTORY       = "@CMAKE_CURRENT_BINARY_DIR@/doc"

fairroot/tools/FairVersion.h.in

@@ -1,3 +1,4 @@
 #ifndef FAIRROOT_VERSION
 #define FAIRROOT_VERSION "@PROJECT_VERSION@"
+#define FAIRROOT_GIT_VERSION "@PROJECT_GIT_VERSION@"
 #endif