Differential D8158 Diff 20478 cmake/modules/GetGitRevisionDescription.cmake.in

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		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@iastate.edu> <abiryan@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		else()
		27		configure_file("@GIT_DIR@/packed-refs" "@GIT_DATA@/packed-refs" COPYONLY)
		28		file(READ "@GIT_DATA@/packed-refs" PACKED_REFS)
		29		if(${PACKED_REFS} MATCHES "([0-9a-z]*) ${HEAD_REF}")
		30		set(HEAD_HASH "${CMAKE_MATCH_1}")
		31		endif()
		32		endif()
		33		else()
		34		# detached HEAD
		35		configure_file("@GIT_DIR@/HEAD" "@GIT_DATA@/head-ref" COPYONLY)
		36		endif()
		37
		38		if(NOT HEAD_HASH)
		39		file(READ "@GIT_DATA@/head-ref" HEAD_HASH LIMIT 1024)
		40		string(STRIP "${HEAD_HASH}" HEAD_HASH)
		41		endif()