#!/usr/bin/cmake -P

## Copyright(c) 2017-2020, Intel Corporation

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# Exports

#

# * OPAE_GIT_EXECUTABLE

# * OPAE_GIT_COMMIT_HASH

# * OPAE_GIT_SRC_TREE_DIRTY

find_program(OPAE_GIT_EXECUTABLE git)

if(EXISTS ${OPAE_GIT_EXECUTABLE})

    # Find the abbreviated git commit hash.

    execute_process(COMMAND ${OPAE_GIT_EXECUTABLE} log -1 --format=%h

        WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}

        OUTPUT_VARIABLE OPAE_GIT_COMMIT_HASH

        RESULT_VARIABLE OPAE_GIT_LOG_RESULT

        OUTPUT_STRIP_TRAILING_WHITESPACE)

    if(NOT ${OPAE_GIT_LOG_RESULT} EQUAL 0)

        set(OPAE_GIT_COMMIT_HASH unknown)

    endif()

    # Determine whether the working tree has changes.

    execute_process(COMMAND ${OPAE_GIT_EXECUTABLE} diff --stat

        WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}

	OUTPUT_VARIABLE OPAE_GIT_DIFF_OUTPUT

	RESULT_VARIABLE OPAE_GIT_DIFF_RESULT

        OUTPUT_STRIP_TRAILING_WHITESPACE)

    if(NOT ${OPAE_GIT_DIFF_RESULT} EQUAL 0)

        set(OPAE_GIT_SRC_TREE_DIRTY 0)

    else()

        if(OPAE_GIT_DIFF_OUTPUT)

            set(OPAE_GIT_SRC_TREE_DIRTY 1)

        else()

            set(OPAE_GIT_SRC_TREE_DIRTY 0)

        endif()

    endif()

else(EXISTS ${OPAE_GIT_EXECUTABLE})

    set(OPAE_GIT_COMMIT_HASH unknown)

    set(OPAE_GIT_SRC_TREE_DIRTY 0)

endif(EXISTS ${OPAE_GIT_EXECUTABLE})