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							176 lines
						
					
					
						
							5.0 KiB
						
					
					
				
								# - Returns a version string from Git
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								#
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								# These functions force a re-configure on each git commit so that you can
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								# trust the values of the variables in your build system.
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								#
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								#  get_git_head_revision(<refspecvar> <hashvar> [<additional arguments to git describe> ...])
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								#
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								# Returns the refspec and sha hash of the current head revision
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								#
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								#  git_describe(<var> [<additional arguments to git describe> ...])
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								#
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								# Returns the results of git describe on the source tree, and adjusting
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								# the output so that it tests false if an error occurs.
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								#
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								#  git_get_exact_tag(<var> [<additional arguments to git describe> ...])
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								#
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								# Returns the results of git describe --exact-match on the source tree,
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								# and adjusting the output so that it tests false if there was no exact
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								# matching tag.
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								#
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								# Requires CMake 2.6 or newer (uses the 'function' command)
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								#
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								# Original Author:
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								# 2009-2010 Ryan Pavlik <rpavlik@iastate.edu> <abiryan@ryand.net>
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								# http://academic.cleardefinition.com
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								# Iowa State University HCI Graduate Program/VRAC
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								#
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								# Copyright Iowa State University 2009-2010.
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								# Distributed under the Boost Software License, Version 1.0.
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								# (See accompanying file LICENSE_1_0.txt or copy at
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								# http://www.boost.org/LICENSE_1_0.txt)
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								if(__get_git_revision_description)
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									return()
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								endif()
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								set(__get_git_revision_description YES)
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								# We must run the following at "include" time, not at function call time,
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								# to find the path to this module rather than the path to a calling list file
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								get_filename_component(_gitdescmoddir ${CMAKE_CURRENT_LIST_FILE} PATH)
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								function(get_git_head_revision _refspecvar _hashvar)
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									set(GIT_PARENT_DIR "${CMAKE_CURRENT_SOURCE_DIR}")
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									set(GIT_DIR "${GIT_PARENT_DIR}/.git")
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									while(NOT EXISTS "${GIT_DIR}")	# .git dir not found, search parent directories
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										set(GIT_PREVIOUS_PARENT "${GIT_PARENT_DIR}")
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										get_filename_component(GIT_PARENT_DIR ${GIT_PARENT_DIR} PATH)
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										if(GIT_PARENT_DIR STREQUAL GIT_PREVIOUS_PARENT)
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											# We have reached the root directory, we are not in git
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											set(${_refspecvar} "GITDIR-NOTFOUND" PARENT_SCOPE)
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											set(${_hashvar} "GITDIR-NOTFOUND" PARENT_SCOPE)
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											return()
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										endif()
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										set(GIT_DIR "${GIT_PARENT_DIR}/.git")
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									endwhile()
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									# check if this is a submodule
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									if(NOT IS_DIRECTORY ${GIT_DIR})
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										file(READ ${GIT_DIR} submodule)
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										string(REGEX REPLACE "gitdir: (.*)\n$" "\\1" GIT_DIR_RELATIVE ${submodule})
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										get_filename_component(SUBMODULE_DIR ${GIT_DIR} PATH)
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										get_filename_component(GIT_DIR ${SUBMODULE_DIR}/${GIT_DIR_RELATIVE} ABSOLUTE)
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									endif()
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									set(GIT_DATA "${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/git-data")
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									if(NOT EXISTS "${GIT_DATA}")
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										file(MAKE_DIRECTORY "${GIT_DATA}")
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									endif()
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									if(NOT EXISTS "${GIT_DIR}/HEAD")
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										return()
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									endif()
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									set(HEAD_FILE "${GIT_DATA}/HEAD")
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									configure_file("${GIT_DIR}/HEAD" "${HEAD_FILE}" COPYONLY)
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									configure_file("${_gitdescmoddir}/GetGitRevisionDescription.cmake.in"
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										"${GIT_DATA}/grabRef.cmake"
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										@ONLY)
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									include("${GIT_DATA}/grabRef.cmake")
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									set(${_refspecvar} "${HEAD_REF}" PARENT_SCOPE)
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									set(${_hashvar} "${HEAD_HASH}" PARENT_SCOPE)
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								endfunction()
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								function(git_describe _var)
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									if(NOT GIT_FOUND)
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										find_package(Git QUIET)
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									endif()
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									get_git_head_revision(refspec hash)
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									if(NOT GIT_FOUND)
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										set(${_var} "GIT-NOTFOUND" PARENT_SCOPE)
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										return()
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									endif()
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									if(NOT hash)
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										set(${_var} "HEAD-HASH-NOTFOUND" PARENT_SCOPE)
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										return()
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									endif()
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									# TODO sanitize
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									#if((${ARGN}" MATCHES "&&") OR
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									#	(ARGN MATCHES "||") OR
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									#	(ARGN MATCHES "\\;"))
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									#	message("Please report the following error to the project!")
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									#	message(FATAL_ERROR "Looks like someone's doing something nefarious with git_describe! Passed arguments ${ARGN}")
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									#endif()
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									#message(STATUS "Arguments to execute_process: ${ARGN}")
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									execute_process(COMMAND
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										"${GIT_EXECUTABLE}"
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										describe
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										${hash}
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										${ARGN}
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										WORKING_DIRECTORY
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										"${CMAKE_SOURCE_DIR}"
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										RESULT_VARIABLE
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										res
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										OUTPUT_VARIABLE
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										out
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										ERROR_QUIET
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										OUTPUT_STRIP_TRAILING_WHITESPACE)
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									if(NOT res EQUAL 0)
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										set(out "${out}-${res}-NOTFOUND")
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									endif()
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									set(${_var} "${out}" PARENT_SCOPE)
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								endfunction()
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								function(git_describe_checkout _var)
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									if(NOT GIT_FOUND)
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										find_package(Git QUIET)
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									endif()
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									get_git_head_revision(refspec hash)
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									if(NOT GIT_FOUND)
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										set(${_var} "GIT-NOTFOUND" PARENT_SCOPE)
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										return()
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									endif()
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									if(NOT hash)
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										set(${_var} "HEAD-HASH-NOTFOUND" PARENT_SCOPE)
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										return()
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									endif()
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									# TODO sanitize
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									#if((${ARGN}" MATCHES "&&") OR
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									#	(ARGN MATCHES "||") OR
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									#	(ARGN MATCHES "\\;"))
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									#	message("Please report the following error to the project!")
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									#	message(FATAL_ERROR "Looks like someone's doing something nefarious with git_describe! Passed arguments ${ARGN}")
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									#endif()
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									#message(STATUS "Arguments to execute_process: ${ARGN}")
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									execute_process(COMMAND
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										"${GIT_EXECUTABLE}"
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										describe
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										--tags
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										--dirty=-dirty
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										--long
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										${ARGN}
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										WORKING_DIRECTORY
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										"${CMAKE_SOURCE_DIR}"
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										RESULT_VARIABLE
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										res
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										OUTPUT_VARIABLE
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										out
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										ERROR_QUIET
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										OUTPUT_STRIP_TRAILING_WHITESPACE)
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									if(NOT res EQUAL 0)
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										set(out "${out}-${res}-NOTFOUND")
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									endif()
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									set(${_var} "${out}" PARENT_SCOPE)
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								endfunction()
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								function(git_get_exact_tag _var)
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									git_describe(out --exact-match ${ARGN})
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									set(${_var} "${out}" PARENT_SCOPE)
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								endfunction()
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