include("${SOURCE_DIR}/cmake/modules/init.cmake")

file(READ "${SOURCE_DIR}/gcore/gdal_version.h.in" GDAL_VERSION_H_CONTENTS)
string(CONCAT
       GDAL_VERSION_H_CONTENTS
       "/* This is a generated file from gdal_version.h.in. DO NOT MODIFY !!!! */\n"
       "${GDAL_VERSION_H_CONTENTS}")

if (GDAL_SHA1SUM)
    # Used for GDAL docker builds
    string(REPLACE "dev" "dev-${GDAL_SHA1SUM}"
           GDAL_VERSION_H_CONTENTS "${GDAL_VERSION_H_CONTENTS}")
    if (GDAL_RELEASE_DATE)
        string(REGEX REPLACE "(define GDAL_RELEASE_DATE[ ]+)([0-9]+)(.*)" "\\1${GDAL_RELEASE_DATE}\\3"
              GDAL_VERSION_H_CONTENTS "${GDAL_VERSION_H_CONTENTS}")
    endif()

#elseif (EXISTS ${SOURCE_DIR}/.git)

    #find_package(Git)
    #if (GIT_FOUND)
        #include(GetGitRevisionDescription)
        #get_git_head_revision(GDAL_GIT_REFSPEC GDAL_GIT_HASH "${SOURCE_DIR}")
        #if ("${GDAL_GIT_HASH}" STREQUAL "")
            #message(WARNING "Cannot determine git hash")
        #else()
            #include(GetGitHeadDate)
            #get_git_head_date(GDAL_GIT_DATE "${SOURCE_DIR}")
            #git_local_changes(GIT_LOCAL_CHG "${SOURCE_DIR}")
            #string(SUBSTRING "${GDAL_GIT_HASH}" 0 10 REV)
            #set(GDAL_DEV_REVISION "dev-${REV}")
            #if (GIT_LOCAL_CHG STREQUAL "DIRTY")
              #set(GDAL_DEV_REVISION "${GDAL_DEV_REVISION}-dirty")
            #elseif (GIT_LOCAL_CHG STREQUAL "UNKNOWN" AND
                    #EXISTS "${BINARY_DIR}/gcore/gdal_version.h" AND
                    #EXISTS "${BINARY_DIR}/gcore/gdal_version_full/gdal_version.h")
              ## Happens typically when running "sudo make install" after "make" as a regular user
              #file(READ "${BINARY_DIR}/gcore/gdal_version_full/gdal_version.h" GDAL_FULL_VERSION_H_CONTENTS)
              #if( "${GDAL_FULL_VERSION_H_CONTENTS}" MATCHES "${REV}" )
                  ## Assume the -dirty state has not been modified. This avoids
                  ## rebuilding files
                  #return()
              #endif()
              ## If we get here, the revision number has changed from the latest build
              ## but we are not able to determine if there are local changes.
              ## Assume none...
            #endif()

            #string(REPLACE "dev" "${GDAL_DEV_REVISION}"
                   #GDAL_VERSION_H_CONTENTS "${GDAL_VERSION_H_CONTENTS}")
            #string(REGEX REPLACE "(define GDAL_RELEASE_DATE[ ]+)([0-9]+)(.*)" "\\1${GDAL_GIT_DATE}\\3"
                  #GDAL_VERSION_H_CONTENTS "${GDAL_VERSION_H_CONTENTS}")
        #endif()
    #endif ()
endif ()

file(WRITE "${BINARY_DIR}/gcore/gdal_version_full/gdal_version.h.tmp" "${GDAL_VERSION_H_CONTENTS}")
execute_process(COMMAND ${CMAKE_COMMAND} -E copy_if_different
                "${BINARY_DIR}/gcore/gdal_version_full/gdal_version.h.tmp"
                "${BINARY_DIR}/gcore/gdal_version_full/gdal_version.h")

# For faster builds, generate a strip down version without GDAL_RELEASE_DATE
# and GDAL_RELEASE_NAME which change quite often in git builds, to save rebuilt
# time
string(REGEX REPLACE "(DO_NOT_DEFINE_GDAL_DATE_NAME\\))(.*)" "\\1\n#endif\n"
          GDAL_VERSION_MINIMUM_H_CONTENTS "${GDAL_VERSION_H_CONTENTS}")
file(WRITE "${BINARY_DIR}/gcore/gdal_version.h.tmp" "${GDAL_VERSION_MINIMUM_H_CONTENTS}")
execute_process(COMMAND ${CMAKE_COMMAND} -E copy_if_different
                "${BINARY_DIR}/gcore/gdal_version.h.tmp"
                "${BINARY_DIR}/gcore/gdal_version.h")