1 # 2 # Internal file for GetGitRevisionDescription.cmake 3 # 4 # Requires CMake 2.6 or newer (uses the 'function' command) 5 # 6 # Original Author: 7 # 2009-2010 Ryan Pavlik <rpavlik (a] iastate.edu> <abiryan (a] ryand.net> 8 # http://academic.cleardefinition.com 9 # Iowa State University HCI Graduate Program/VRAC 10 # 11 # Copyright Iowa State University 2009-2010. 12 # Distributed under the Boost Software License, Version 1.0. 13 # (See accompanying file LICENSE_1_0.txt or copy at 14 # http://www.boost.org/LICENSE_1_0.txt) 15 16 set(HEAD_HASH) 17 18 file(READ "@HEAD_FILE@" HEAD_CONTENTS LIMIT 1024) 19 20 string(STRIP "${HEAD_CONTENTS}" HEAD_CONTENTS) 21 if(HEAD_CONTENTS MATCHES "ref") 22 # named branch 23 string(REPLACE "ref: " "" HEAD_REF "${HEAD_CONTENTS}") 24 if(EXISTS "@GIT_DIR@/${HEAD_REF}") 25 configure_file("@GIT_DIR@/${HEAD_REF}" "@GIT_DATA@/head-ref" COPYONLY) 26 elseif(EXISTS "@GIT_DIR@/logs/${HEAD_REF}") 27 configure_file("@GIT_DIR@/logs/${HEAD_REF}" "@GIT_DATA@/head-ref" COPYONLY) 28 set(HEAD_HASH "${HEAD_REF}") 29 endif() 30 else() 31 # detached HEAD 32 configure_file("@GIT_DIR@/HEAD" "@GIT_DATA@/head-ref" COPYONLY) 33 endif() 34 35 if(NOT HEAD_HASH) 36 file(READ "@GIT_DATA@/head-ref" HEAD_HASH LIMIT 1024) 37 string(STRIP "${HEAD_HASH}" HEAD_HASH) 38 endif() 39
