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# SPDX-FileCopyrightText: Copyright 2025 crueter
# SPDX-License-Identifier: LGPL-3.0-or-later
## GetSCMRev ##
# Name is self explanatory. Gets revision information from files, OR from git.
# Prioritizes GIT-TAG, GIT-REFSPEC, GIT-COMMIT, GIT-RELEASE files within the root directory,
# otherwise grabs stuff from Git.
# loosely based on Ryan Pavlik's work
find_package(Git QUIET)
# commit: git rev-parse HEAD
# tag: git describe --tags --abbrev=0
# branch: git rev-parse --abbrev-ref=HEAD
# TODO: string overrides
function(run_git_command variable)
if(NOT GIT_FOUND)
set(${variable} "GIT-NOTFOUND" PARENT_SCOPE)
return()
endif()
execute_process(COMMAND
"${GIT_EXECUTABLE}"
${ARGN}
WORKING_DIRECTORY
"${CMAKE_SOURCE_DIR}"
RESULT_VARIABLE
res
OUTPUT_VARIABLE
out
ERROR_QUIET
OUTPUT_STRIP_TRAILING_WHITESPACE)
if(NOT res EQUAL 0)
set(out "${out}-${res}-NOTFOUND")
endif()
set(${variable} "${out}" PARENT_SCOPE)
endfunction()
function(trim var)
string(REGEX REPLACE "\n" "" new "${${var}}")
set(${var} ${new} PARENT_SCOPE)
endfunction()
set(TAG_FILE ${CMAKE_SOURCE_DIR}/GIT-TAG)
set(REF_FILE ${CMAKE_SOURCE_DIR}/GIT-REFSPEC)
set(COMMIT_FILE ${CMAKE_SOURCE_DIR}/GIT-COMMIT)
set(RELEASE_FILE ${CMAKE_SOURCE_DIR}/GIT-RELEASE)
if (EXISTS ${REF_FILE} AND EXISTS ${COMMIT_FILE})
file(READ ${REF_FILE} GIT_REFSPEC)
file(READ ${COMMIT_FILE} GIT_COMMIT)
else()
run_git_command(GIT_COMMIT rev-parse HEAD)
run_git_command(GIT_REFSPEC rev-parse --abbrev-ref HEAD)
if (GIT_REFSPEC MATCHES "NOTFOUND")
set(GIT_REFSPEC 1.0.0)
set(GIT_COMMIT stable)
endif()
endif()
if (EXISTS ${TAG_FILE})
file(READ ${TAG_FILE} GIT_TAG)
else()
run_git_command(GIT_TAG describe --tags --abbrev=0)
if (GIT_TAG MATCHES "NOTFOUND")
set(GIT_TAG "${GIT_REFSPEC}")
endif()
endif()
if (EXISTS ${RELEASE_FILE})
file(READ ${RELEASE_FILE} GIT_RELEASE)
trim(GIT_RELEASE)
message(STATUS "[GetSCMRev] Git release: ${GIT_RELEASE}")
endif()
trim(GIT_REFSPEC)
trim(GIT_COMMIT)
trim(GIT_TAG)
message(STATUS "[GetSCMRev] Git commit: ${GIT_COMMIT}")
message(STATUS "[GetSCMRev] Git tag: ${GIT_TAG}")
message(STATUS "[GetSCMRev] Git refspec: ${GIT_REFSPEC}")
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