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# SPDX-License-Identifier: GPL-2.0
#
# Copyright (C) 2020 Manuel Bentele <development@manuel-bentele.de>
#
macro(gen_project_version VERSION_INPUT_FILE VERSION_INPUT_FILE_TEMPLATE VERSION_OUTPUT_FILE GIT_EXECUTABLE REPOSITORY_DIR)
get_filename_component(VERSION_OUTPUT_FILENAME ${VERSION_OUTPUT_FILE} NAME)
# command that will trigger a rebuild of version.h every time
add_custom_command(OUTPUT regenerate-version-file
COMMAND ${CMAKE_COMMAND} -E sleep 0
COMMENT "Trigger generating ${VERSION_OUTPUT_FILENAME}")
# call the GenerateVersion.cmake file to generate the version.c file
add_custom_command(OUTPUT ${VERSION_OUTPUT_FILE}
COMMAND ${CMAKE_COMMAND} -D VERSION_MODULE_PATH=${PROJECT_MODULES_DIR}
-D VERSION_INPUT_FILE=${VERSION_INPUT_FILE}
-D VERSION_INPUT_FILE_TEMPLATE=${VERSION_INPUT_FILE_TEMPLATE}
-D VERSION_OUTPUT_FILE=${VERSION_OUTPUT_FILE}
-D VERSION_BUILD_TYPE=${CMAKE_BUILD_TYPE}
-D GIT_EXECUTABLE=${GIT_EXECUTABLE}
-D REPOSITORY_DIR=${REPOSITORY_DIR}
-P ${PROJECT_MODULES_DIR}/GenerateVersion.cmake
COMMENT "Generating ${VERSION_OUTPUT_FILENAME}"
DEPENDS regenerate-version-file)
add_custom_target(dnbd3-generate-version DEPENDS ${VERSION_OUTPUT_FILE})
# create target to expose project version
add_library(dnbd3-version INTERFACE)
target_include_directories(dnbd3-version INTERFACE ${PROJECT_INCLUDE_GEN_DIR})
add_dependencies(dnbd3-version dnbd3-generate-version)
endmacro(gen_project_version VERSION_INPUT_FILE VERSION_INPUT_FILE_TEMPLATE VERSION_OUTPUT_FILE)
# macro to get Git version information
macro(get_repository_version REPOSITORY_VERSION VERSION_HEADER_FILE VERSION_BUILD_TYPE GIT_EXECUTABLE REPOSITORY_DIR)
# check if generated version header from source package is available
if(EXISTS ${VERSION_HEADER_FILE})
# get version information from the generated version header of the source package
file(READ ${VERSION_HEADER_FILE} GIT_VERSION)
string(REGEX MATCH "DNBD3_VERSION[ \t]+\"([0-9][A-Za-z0-9.+~-]*)\"" GIT_VERSION ${GIT_VERSION})
set(GIT_VERSION "${CMAKE_MATCH_1}")
else(EXISTS ${VERSION_HEADER_FILE})
# get detailed Git version information from Git repository
execute_process(COMMAND ${GIT_EXECUTABLE} describe HEAD
WORKING_DIRECTORY ${REPOSITORY_DIR}
OUTPUT_VARIABLE GIT_VERSION
OUTPUT_STRIP_TRAILING_WHITESPACE)
execute_process(COMMAND ${GIT_EXECUTABLE} rev-parse --abbrev-ref HEAD
WORKING_DIRECTORY ${REPOSITORY_DIR}
OUTPUT_VARIABLE GIT_BRANCH
OUTPUT_STRIP_TRAILING_WHITESPACE)
# overwrite version from Git if version is unknown
if(GIT_VERSION STREQUAL "")
set(GIT_VERSION "unknown")
endif(GIT_VERSION STREQUAL "")
if(GIT_BRANCH STREQUAL "")
set(GIT_BRANCH "unknown")
endif(GIT_BRANCH STREQUAL "")
# get status of Git repository
execute_process(COMMAND ${GIT_EXECUTABLE} status --porcelain
WORKING_DIRECTORY ${REPOSITORY_DIR}
OUTPUT_VARIABLE GIT_STATUS
OUTPUT_STRIP_TRAILING_WHITESPACE)
# check if Git repository is dirty
if(NOT GIT_STATUS STREQUAL "")
# the Git repository is dirty, thus extend the version information
set(GIT_VERSION "${GIT_VERSION}+MOD")
# print a message in Release build configuration to warn about the dirty repository
if(${VERSION_BUILD_TYPE} MATCHES "Release")
message(WARNING "This dnbd3 Git repository is dirty! Please commit or revert all changes for a ${VERSION_BUILD_TYPE} build!")
endif(${VERSION_BUILD_TYPE} MATCHES "Release")
endif(NOT GIT_STATUS STREQUAL "")
endif(EXISTS ${VERSION_HEADER_FILE})
# remove the first letter of the version to satisfy packaging rules
# and return to caller
string(REGEX MATCH "([0-9]+:)?[0-9][A-Za-z0-9.+~-]*" ${REPOSITORY_VERSION} ${GIT_VERSION})
endmacro(get_repository_version)
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