/usr/share/bctoolbox/cmake/BcGitVersion.cmake is in libbctoolbox-dev 0.6.0-2build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# BcGitVersion.cmake
# Copyright (C) 2017 Belledonne Communications, Grenoble France
#
############################################################################
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
############################################################################
if(GIT_EXECUTABLE)
macro(GIT_COMMAND OUTPUT_VAR)
set(GIT_ARGS ${ARGN})
execute_process(
COMMAND ${GIT_EXECUTABLE} ${ARGN}
WORKING_DIRECTORY ${WORK_DIR}
OUTPUT_VARIABLE ${OUTPUT_VAR}
OUTPUT_STRIP_TRAILING_WHITESPACE
)
endmacro()
GIT_COMMAND(GIT_DESCRIBE describe --always)
GIT_COMMAND(GIT_TAG describe --abbrev=0)
GIT_COMMAND(GIT_REVISION rev-parse HEAD)
endif()
string(TOUPPER "${PROJECT_NAME}" PREFIX_GIT_VERSION)
string(REPLACE "-" "_" PREFIX_GIT_VERSION "${PREFIX_GIT_VERSION}")
if(GIT_DESCRIBE)
if(NOT GIT_TAG STREQUAL PROJECT_VERSION)
message(WARNING "Project version (${PROJECT_VERSION}) and git tag (${GIT_TAG}) differ. Please put them identical")
endif()
set(PROJECT_GIT_VERSION "${GIT_DESCRIBE}")
configure_file("${TEMPLATE_DIR}/gitversion.h.in" "${OUTPUT_DIR}/gitversion.h" @ONLY)
elseif(GIT_REVISION)
set(PROJECT_GIT_VERSION "${LINPHONE_VERSION}_${GIT_REVISION}")
configure_file("${TEMPLATE_DIR}/gitversion.h.in" "${OUTPUT_DIR}/gitversion.h" @ONLY)
else()
if(NOT EXISTS "${OUTPUT_DIR}/gitversion.h")
execute_process(COMMAND ${CMAKE_COMMAND} -E touch "${OUTPUT_DIR}/gitversion.h")
endif()
endif()
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