# Run git commands to generate information which uniquely identifies the software version
# This version is 
# - pasted into mainpage.dox so it is visible to all readers
# - configured into QmitkBuildInfo.cpp (in [..]/CMakeLists.txt)
# - used for the Installer filename (in [..]/Deployment/CMakeLists.txt)
EXECUTE_PROCESS(COMMAND git describe --exact-match
                WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
                OUTPUT_VARIABLE PROJECT_GIT_TAGNAME
                RESULT_VARIABLE proper_version
                ERROR_VARIABLE dummy)
STRING(STRIP "${PROJECT_GIT_TAGNAME}" PROJECT_GIT_TAGNAME) # removes newline
#message(STATUS "git knows tag '${PROJECT_GIT_TAGNAME}' for current build")

IF(proper_version EQUAL 0)
  #message(STATUS "Building product version ${PROJECT_GIT_TAGNAME}")
ELSE(proper_version EQUAL 0)
  #message(STATUS "Building development version")
  SET(PROJECT_GIT_TAGNAME "DEVELOPMENT VERSION")
ENDIF(proper_version EQUAL 0)
  
EXECUTE_PROCESS(COMMAND git rev-parse HEAD
                WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
                OUTPUT_VARIABLE PROJECT_GIT_SHA1)
STRING(STRIP "${PROJECT_GIT_SHA1}" PROJECT_GIT_SHA1) # removes newline

# Determine VTK version
find_package(VTK)

# Determine ITK version
find_package(ITK)
set(ITK_VERSION "${ITK_VERSION_MAJOR}.${ITK_VERSION_MINOR}.${ITK_VERSION_PATCH}")

# Determine Qt version
#find_package(Qt4) (already done here)
set(QT_VERSION "${QT_VERSION_MAJOR}.${QT_VERSION_MINOR}.${QT_VERSION_PATCH}")

# Determine DCMTK version (TODO!)
file(STRINGS ${DCMTK_DIR}/share/doc/dcmtk/VERSION DCMTK_VERSION) 

# Determine GDCM version
include(${ITK_GDCM_DIR}/GDCMConfigVersion.cmake)

# Determine MITK version (similar to PROJECT version, see comments above)
EXECUTE_PROCESS(COMMAND git describe --exact-match
                WORKING_DIRECTORY ${MITK_SOURCE_DIR}
                OUTPUT_VARIABLE MITK_GIT_TAGNAME
                RESULT_VARIABLE proper_version
                ERROR_VARIABLE dummy)

IF(proper_version EQUAL 0)
  #message(STATUS "Using MITK tagged version ${MITK_GIT_TAGNAME}")
ELSE(proper_version EQUAL 0)
  #message(STATUS "Using MITK DEVELOPMENT version")
  SET(MITK_GIT_TAGNAME "DEVELOPMENT VERSION")
ENDIF(proper_version EQUAL 0)
STRING(STRIP "${MITK_GIT_TAGNAME}"MITK_GIT_TAGNAME) # removes newline

EXECUTE_PROCESS(COMMAND git rev-parse HEAD
                WORKING_DIRECTORY ${MITK_SOURCE_DIR}
                OUTPUT_VARIABLE MITK_GIT_SHA1)
STRING(STRIP "${MITK_GIT_SHA1}" MITK_GIT_SHA1) # removes newline


set(MITK_VERSION "${MITK_VERSION_MAJOR}.${MITK_VERSION_MINOR}.${MITK_VERSION_PATCH} (${MITK_GIT_TAGNAME} ${MITK_GIT_SHA1})")

# Output for information
message(STATUS "--- Toolkit Configuration ---")
message(STATUS "THIS  ${PROJECT_GIT_TAGNAME} ${PROJECT_GIT_SHA1}")
message(STATUS "MITK  ${MITK_VERSION}")
message(STATUS "Qt    ${QT_VERSION}")
message(STATUS "DCMTK ${DCMTK_VERSION}")
message(STATUS "GDCM  ${GDCM_VERSION}")
message(STATUS "VTK   ${VTK_VERSION}")
message(STATUS "ITK   ${ITK_VERSION}")
message(STATUS "-----------------------------")