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refactor/cleanup GitTagVersion.cmake 

Run just one `git tag` command instead of two (with tags and refs) and
break it into the form [tag0, ref0, tag1, ref1, ...]. Iterate over the
list with two counters for tag and ref.
This commit is contained in:
Rafael Kitover 2017-10-10 03:15:53 -07:00
parent 52439cee0e
commit 55fa9c69c0
1 changed files with 36 additions and 49 deletions
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83
cmake/GitTagVersion.cmake
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@ -6,67 +6,54 @@ function(git_version version revision version_release)
find_package(Git)
if(GIT_FOUND AND EXISTS "${CMAKE_SOURCE_DIR}/.git")
# get latest version from tag history
execute_process(COMMAND ${GIT_EXECUTABLE} tag --sort=-creatordate OUTPUT_VARIABLE sorted_tags OUTPUT_STRIP_TRAILING_WHITESPACE)
execute_process(COMMAND "${GIT_EXECUTABLE}" tag "--format=%(align:width=20)%(refname:short)%(end)%(if)%(*objectname)%(then)%(*objectname)%(else)%(objectname)%(end)" --sort=-creatordate OUTPUT_VARIABLE tags OUTPUT_STRIP_TRAILING_WHITESPACE)
# if no tags (e.g. shallow clone) do nothing
if(NOT sorted_tags)
if(tags STREQUAL "")
return()
endif()
# convert to list (see: https://public.kitware.com/pipermail/cmake/2007-May/014222.html)
string(REGEX REPLACE ";" "\\\\;" sorted_tags "${sorted_tags}")
string(REGEX REPLACE "\n" ";" sorted_tags "${sorted_tags}")
# convert to list of the form [tag0, ref0, tag1, ref1, ...]
string(REGEX REPLACE "[ \n]+" ";" tags "${tags}")
foreach(tag ${sorted_tags})
execute_process(COMMAND "${GIT_EXECUTABLE}" rev-parse HEAD OUTPUT_VARIABLE current_ref OUTPUT_STRIP_TRAILING_WHITESPACE)
# if cannot get current ref, do nothing
if(current_ref STREQUAL "")
return()
endif()
list(LENGTH tags cnt)
set(i 0)
set(j 1)
while(i LESS cnt AND "${${version}}" STREQUAL "")
list(GET tags ${i} tag)
list(GET tags ${j} ref)
# tag is a version number with or without a "-revision"
if(tag MATCHES "^v?(([0-9]+\\.?)*[0-9]*)(-(.*))?$")
set(${version} "${CMAKE_MATCH_1}" CACHE STRING "Latest Git Tag Version" FORCE)
set(revision_str "${CMAKE_MATCH_4}")
break()
endif()
endforeach()
if(revision_str)
# don't need to read revision from tags
set(${revision} "${revision_str}" CACHE STRING "Latest Git Tag Revision" FORCE)
return()
endif()
# get the current revision
execute_process(COMMAND ${GIT_EXECUTABLE} tag "--format=%(align:width=20)%(refname:short)%(end)%(if)%(*objectname)%(then)%(*objectname)%(else)%(objectname)%(end)" --sort=-creatordate OUTPUT_VARIABLE sorted_tags_refs OUTPUT_STRIP_TRAILING_WHITESPACE)
# if no tags (e.g. shallow clone) do nothing
if(NOT sorted_tags_refs)
return()
endif()
# convert to list (see: https://public.kitware.com/pipermail/cmake/2007-May/014222.html)
string(REGEX REPLACE ";" "\\\\;" sorted_tags_refs "${sorted_tags_refs}")
string(REGEX REPLACE "\n" ";" sorted_tags_refs "${sorted_tags_refs}")
# get the newest tag
list(GET sorted_tags_refs 0 tag_ref)
string(REGEX REPLACE "^([^ ]+) +([^ ]+)$" "\\1" tag "${tag_ref}")
string(REGEX REPLACE "^([^ ]+) +([^ ]+)$" "\\2" ref "${tag_ref}")
execute_process(COMMAND ${GIT_EXECUTABLE} rev-parse HEAD OUTPUT_VARIABLE current_ref OUTPUT_STRIP_TRAILING_WHITESPACE)
if(tag MATCHES "^v?(([0-9]+\\.?)*[0-9]*)(-(.*))?$" AND ref STREQUAL current_ref)
set(revision_str "${CMAKE_MATCH_4}")
# version and no revision tagged for current commit
if(NOT revision_str)
set(${revision} "" CACHE STRING "Latest Git Tag Revision" FORCE)
set(${version_release} 1 CACHE STRING "Is this a versioned release without revision" FORCE)
else()
set(${revision} "${revision_str}" CACHE STRING "Latest Git Tag Revision" FORCE)
endif()
if(i EQUAL 0)
if(NOT "${CMAKE_MATCH_4}" STREQUAL "")
set(${revision} "${CMAKE_MATCH_4}" CACHE STRING "Latest Git Tag Revision" FORCE)
elseif(ref STREQUAL current_ref)
set(${version_release} 1 CACHE STRING "Is this a versioned release without revision" FORCE)
endif()
endif()
elseif(i EQUAL 0 AND ref STREQUAL current_ref)
# revision name tagged
set(${revision} "${tag}" CACHE STRING "Latest Git Tag Revision" FORCE)
else()
endif()
math(EXPR i "${i} + 2")
math(EXPR j "${j} + 2")
endwhile()
if(NOT "${${version_release}}" AND "${${revision}}" STREQUAL "")
# dev version, use short sha for ref
execute_process(COMMAND ${GIT_EXECUTABLE} rev-parse --short HEAD OUTPUT_VARIABLE short_sha OUTPUT_STRIP_TRAILING_WHITESPACE)
execute_process(COMMAND "${GIT_EXECUTABLE}" rev-parse --short HEAD OUTPUT_VARIABLE short_sha OUTPUT_STRIP_TRAILING_WHITESPACE)
set(${revision} "${short_sha}" CACHE STRING "Latest Git Tag Revision" FORCE)
endif()
endif()