# SPDX-FileCopyrightText: 2009 Iowa State University # SPDX-FileContributor: Ryan Pavlik <rpavlik@iastate.edu> <abiryan@ryand.net> # SPDX-License-Identifier: BSL-1.0 # Internal file for GetGitRevisionDescription.cmake # # Requires CMake 2.6 or newer (uses the 'function' command) # # Original Author: # 2009-2010 Ryan Pavlik <rpavlik@iastate.edu> <abiryan@ryand.net> # http://academic.cleardefinition.com # Iowa State University HCI Graduate Program/VRAC # # Copyright Iowa State University 2009-2010. # Distributed under the Boost Software License, Version 1.0. # (See accompanying file LICENSE_1_0.txt or copy at # http://www.boost.org/LICENSE_1_0.txt) set(HEAD_HASH) file(READ "@HEAD_FILE@" HEAD_CONTENTS LIMIT 1024) string(STRIP "${HEAD_CONTENTS}" HEAD_CONTENTS) if(HEAD_CONTENTS MATCHES "ref") # named branch string(REPLACE "ref: " "" HEAD_REF "${HEAD_CONTENTS}") if(EXISTS "@GIT_DIR@/${HEAD_REF}") configure_file("@GIT_DIR@/${HEAD_REF}" "@GIT_DATA@/head-ref" COPYONLY) elseif(EXISTS "@GIT_DIR@/logs/${HEAD_REF}") configure_file("@GIT_DIR@/logs/${HEAD_REF}" "@GIT_DATA@/head-ref" COPYONLY) set(HEAD_HASH "${HEAD_REF}") endif() else() # detached HEAD configure_file("@GIT_DIR@/HEAD" "@GIT_DATA@/head-ref" COPYONLY) endif() if(NOT HEAD_HASH) if(EXISTS "@GIT_DATA@/head-ref") file(READ "@GIT_DATA@/head-ref" HEAD_HASH LIMIT 1024) string(STRIP "${HEAD_HASH}" HEAD_HASH) else() set(HEAD_HASH "Unknown") endif() endif()