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ceph/cmake/modules/GetGitRevisionDescription.cmake
Ali Maredia 0f6b9f2816 Combined CMake Build for Hammer
CMake Ceph Build System (Firefly)
CMake.  Add tests.
Respace src/CMakeLists.txt.
CMake.  Spacing cleanups.
CMake for Firefly is Triumphant
CMake for Giant
Adapt to Giant.
Fix installation for scripts and man pages
Fix CEPH_LIBDIR and CEPH_PKGLIBDIR defines
Add erasure-code libraries
	uses try_compile() to detect support for -msse flags
Fix rados object classes
Propagate Casey's cls library change to src/test.
Fix CMake build for Hammer.
Try-add rados and common to librbd link.
Fix name and linkage of libec_lrc.
Rename arch/neon.c arm.c
Fix libcommon.a dependencies (some unit tests).

Authors:
	Ali Maredia <ali@cohortfs.com>
	Casey Bodley <casey@cohortfs.com>
	Adam Emerson <aemerson@cohortfs.com>
	Marcus Watts <mdw@cohortfs.com>
	Matt Benjamin <matt@cohortfs.com>

Signed-off-by: Matt Benjamin <matt@cohortfs.com>
2015-01-14 16:40:05 -05:00

131 lines
4.0 KiB
CMake

# - 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(<refspecvar> <hashvar> [<additional arguments to git describe> ...])
#
# Returns the refspec and sha hash of the current head revision
#
# git_describe(<var> [<additional arguments to 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(<var> [<additional arguments to git describe> ...])
#
# 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.
#
# 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)
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_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()