GenerateVersionDefinitions.cmake

# Copyright (c) 2022, ETH Zurich and UNC Chapel Hill.
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#     * Redistributions of source code must retain the above copyright
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# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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# Author: Johannes L. Schoenberger (jsch-at-demuc-dot-de)

if (DEFINED GIT_COMMIT_ID OR DEFINED GIT_COMMIT_DATE)
    message(STATUS "Using custom-defined GIT_COMMIT_ID (${GIT_COMMIT_ID}) "
            "and GIT_COMMIT_DATE (${GIT_COMMIT_DATE})")
elseif(Git_FOUND AND EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/.git")
    execute_process(COMMAND
        "${GIT_EXECUTABLE}" rev-parse --short HEAD
        WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
        OUTPUT_VARIABLE GIT_COMMIT_ID
        ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)

    execute_process(COMMAND
        "${GIT_EXECUTABLE}" log -1 --format=%ad --date=short
        WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
        OUTPUT_VARIABLE GIT_COMMIT_DATE
        ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
else()
    set(GIT_COMMIT_ID "Unknown")
    set(GIT_COMMIT_DATE "Unknown")
endif()

configure_file("${CMAKE_CURRENT_SOURCE_DIR}/src/util/version.h.in"
               "${CMAKE_CURRENT_SOURCE_DIR}/src/util/version.h")