Subversion Repositories s80186

# - Returns a version string from Git

#

# These functions force a re-configure on each git commit so that you can

# trust the values of the variables in your build system.

#

#  get_git_head_revision(  [ ...])

#

# Returns the refspec and sha hash of the current head revision

#

#  git_describe( [ ...])

#

# Returns the results of git describe on the source tree, and adjusting

# the output so that it tests false if an error occurs.

#

#  git_get_exact_tag( [ ...])

#

# Returns the results of git describe --exact-match on the source tree,

# and adjusting the output so that it tests false if there was no exact

# matching tag.

#

#  git_local_changes()

#

# Returns either "CLEAN" or "DIRTY" with respect to uncommitted changes.

# Uses the return code of "git diff-index --quiet HEAD --".

# Does not regard untracked files.

#

# Requires CMake 2.6 or newer (uses the 'function' command)

#

# Original Author:

# 2009-2010 Ryan Pavlik  

# 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)

if(__get_git_revision_description)

        return()

endif()

set(__get_git_revision_description YES)

# We must run the following at "include" time, not at function call time,

# to find the path to this module rather than the path to a calling list file

get_filename_component(_gitdescmoddir ${CMAKE_CURRENT_LIST_FILE} PATH)

function(get_git_head_revision _refspecvar _hashvar)

        set(GIT_PARENT_DIR "${CMAKE_CURRENT_SOURCE_DIR}")

        set(GIT_DIR "${GIT_PARENT_DIR}/.git")

        while(NOT EXISTS "${GIT_DIR}")  # .git dir not found, search parent directories

                set(GIT_PREVIOUS_PARENT "${GIT_PARENT_DIR}")

                get_filename_component(GIT_PARENT_DIR ${GIT_PARENT_DIR} PATH)

                if(GIT_PARENT_DIR STREQUAL GIT_PREVIOUS_PARENT)

                        # We have reached the root directory, we are not in git

                        set(${_refspecvar} "GITDIR-NOTFOUND" PARENT_SCOPE)

                        set(${_hashvar} "GITDIR-NOTFOUND" PARENT_SCOPE)

                        return()

                endif()

                set(GIT_DIR "${GIT_PARENT_DIR}/.git")

        endwhile()

        # check if this is a submodule

        if(NOT IS_DIRECTORY ${GIT_DIR})

                file(READ ${GIT_DIR} submodule)

                string(REGEX REPLACE "gitdir: (.*)\n$" "\\1" GIT_DIR_RELATIVE ${submodule})

                get_filename_component(SUBMODULE_DIR ${GIT_DIR} PATH)

                get_filename_component(GIT_DIR ${SUBMODULE_DIR}/${GIT_DIR_RELATIVE} ABSOLUTE)

        endif()

        set(GIT_DATA "${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/git-data")

        if(NOT EXISTS "${GIT_DATA}")

                file(MAKE_DIRECTORY "${GIT_DATA}")

        endif()

        if(NOT EXISTS "${GIT_DIR}/HEAD")

                return()

        endif()

        set(HEAD_FILE "${GIT_DATA}/HEAD")

        configure_file("${GIT_DIR}/HEAD" "${HEAD_FILE}" COPYONLY)

        configure_file("${_gitdescmoddir}/GetGitRevisionDescription.cmake.in"

                "${GIT_DATA}/grabRef.cmake"

                @ONLY)

        include("${GIT_DATA}/grabRef.cmake")

        set(${_refspecvar} "${HEAD_REF}" PARENT_SCOPE)

        set(${_hashvar} "${HEAD_HASH}" PARENT_SCOPE)

endfunction()

function(git_describe _var)

        if(NOT GIT_FOUND)

                find_package(Git QUIET)

        endif()

        get_git_head_revision(refspec hash)

        if(NOT GIT_FOUND)

                set(${_var} "GIT-NOTFOUND" PARENT_SCOPE)

                return()

        endif()

        if(NOT hash)

                set(${_var} "HEAD-HASH-NOTFOUND" PARENT_SCOPE)

                return()

        endif()

        # TODO sanitize

        #if((${ARGN}" MATCHES "&&") OR

        #       (ARGN MATCHES "||") OR

        #       (ARGN MATCHES "\\;"))

        #       message("Please report the following error to the project!")

        #       message(FATAL_ERROR "Looks like someone's doing something nefarious with git_describe! Passed arguments ${ARGN}")

        #endif()

        #message(STATUS "Arguments to execute_process: ${ARGN}")

        execute_process(COMMAND

                "${GIT_EXECUTABLE}"

                describe

                ${hash}

                ${ARGN}

                WORKING_DIRECTORY

                "${CMAKE_CURRENT_SOURCE_DIR}"

                RESULT_VARIABLE

                res

                OUTPUT_VARIABLE

                out

                ERROR_QUIET

                OUTPUT_STRIP_TRAILING_WHITESPACE)

        if(NOT res EQUAL 0)

                set(out "${out}-${res}-NOTFOUND")

        endif()

        set(${_var} "${out}" PARENT_SCOPE)

endfunction()

function(git_get_exact_tag _var)

        git_describe(out --exact-match ${ARGN})

        set(${_var} "${out}" PARENT_SCOPE)

endfunction()

function(git_local_changes _var)

        if(NOT GIT_FOUND)

                find_package(Git QUIET)

        endif()

        get_git_head_revision(refspec hash)

        if(NOT GIT_FOUND)

                set(${_var} "GIT-NOTFOUND" PARENT_SCOPE)

                return()

        endif()

        if(NOT hash)

                set(${_var} "HEAD-HASH-NOTFOUND" PARENT_SCOPE)

                return()

        endif()

        execute_process(COMMAND

                "${GIT_EXECUTABLE}"

                diff-index --quiet HEAD --

                WORKING_DIRECTORY

                "${CMAKE_CURRENT_SOURCE_DIR}"

                RESULT_VARIABLE

                res

                OUTPUT_VARIABLE

                out

                ERROR_QUIET

                OUTPUT_STRIP_TRAILING_WHITESPACE)

        if(res EQUAL 0)

                set(${_var} "CLEAN" PARENT_SCOPE)

        else()

                set(${_var} "DIRTY" PARENT_SCOPE)

        endif()

endfunction()