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# generate a cmake script containing git submodule version information.
# This is typically done during "make dist", and is needed for SBOM generation
# During the build from source package, git info is no more available.
#
# What is in this script
# - Variable ALL_SUBMODULES, a list of submodule subdirectories
# - for every entry in this list, there are 2 related variables defined
# ${name}_REVISION, set to the git tag of submodule, or git hash, if tags are missing
# ${name}_URL , set to the git URL of the submodule
# For example, following will be generated for wolfssl
# SET(extra/wolfssl/wolfssl_REVISION v5.7.2-stable)
# SET(extra/wolfssl/wolfssl_URL https://github.com/wolfSSL/wolfssl.git)
FUNCTION(generate_submodule_info outfile)
FIND_PACKAGE(Git REQUIRED)
SET(git_cmd "(git describe --tags --exact 2>/dev/null || echo no-tag) && git rev-parse --short HEAD && git remote get-url origin")
SET(ENV_LC_ALL "$ENV{LC_ALL}")
SET($ENV{LC_ALL} C)
EXECUTE_PROCESS(
COMMAND
${GIT_EXECUTABLE} submodule foreach --recursive ${git_cmd}
OUTPUT_VARIABLE outvar
RESULT_VARIABLE res
WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
)
IF(NOT(${res} EQUAL 0))
MESSAGE(FATAL_ERROR "'git submodule foreach' failed")
ENDIF()
IF(NOT "${ENV_LC_ALL}" STREQUAL "")
SET($ENV{LC_ALL} ${ENV_LC_ALL})
ENDIF()
STRING(REPLACE "\n" ";" out_list "${outvar}")
SET(out_string)
SET(all_submodules)
SET(counter 0)
FOREACH(s ${out_list})
IF(${counter} EQUAL 0)
IF (NOT("${s}" MATCHES "Entering '"))
MESSAGE(FATAL "Unexpected output ${outvar}")
ENDIF()
STRING(LENGTH "${s}" slen)
MATH(EXPR substr_len "${slen} - 11")
STRING(SUBSTRING "${s}" 10 ${substr_len} submodule)
LIST(APPEND all_submodules ${submodule})
ELSEIF(${counter} EQUAL 1)
# tag
STRING(APPEND out_string "SET(${submodule}_TAG ${s})\n")
ELSEIF(${counter} EQUAL 2)
# get revision
STRING(APPEND out_string "SET(${submodule}_REVISION ${s})\n")
ELSEIF(${counter} EQUAL 3)
# origin url
STRING(APPEND out_string "SET(${submodule}_URL ${s})\n")
ELSE()
MESSAGE(FATAL_ERROR "should never happen")
ENDIF()
MATH(EXPR counter "(${counter}+1)%4")
ENDFOREACH()
STRING(APPEND out_string "SET(ALL_SUBMODULES \"${all_submodules}\")\n")
# Also while not strictly "submodule" info, get the origin url
IF(NOT GIT_REMOTE_ORIGIN_URL)
EXECUTE_PROCESS(
COMMAND
${GIT_EXECUTABLE} remote get-url origin
OUTPUT_VARIABLE GIT_REMOTE_ORIGIN_URL
OUTPUT_STRIP_TRAILING_WHITESPACE
RESULT_VARIABLE res
WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
)
IF(("${GIT_REMOTE_ORIGIN_URL}" STREQUAL "") OR NOT(${res} EQUAL 0))
# Meh, origin is not called "origin", and there is no GIT_REMOTE_ORIGIN_URL
# set. Fallback to hardcoded default
SET(GIT_REMOTE_ORIGIN_URL https://github.com/mariadb/server.git)
ENDIF()
ENDIF()
STRING(APPEND out_string "SET(GIT_REMOTE_ORIGIN_URL \"${GIT_REMOTE_ORIGIN_URL}\")\n")
EXECUTE_PROCESS(
COMMAND
${GIT_EXECUTABLE} rev-parse --short HEAD
OUTPUT_VARIABLE outvar
OUTPUT_STRIP_TRAILING_WHITESPACE
RESULT_VARIABLE res
WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
)
STRING(APPEND out_string "SET(GIT_REV_SHORT \"${outvar}\")\n")
SET(CMAKE_CONFIGURABLE_FILE_CONTENT ${out_string})
CONFIGURE_FILE(${CMAKE_SOURCE_DIR}/cmake/configurable_file_content.in ${outfile} @ONLY)
ENDFUNCTION()
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