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# SPDX-License-Identifier: GPL-2.0-or-later
# This is called by cmake as an external process from
# ./source/creator/CMakeLists.txt to write ./source/creator/buildinfo.h
# Caller must define:
# SOURCE_DIR
# Optional overrides:
# BUILD_DATE
# BUILD_TIME
# Extract working copy information for SOURCE_DIR into MY_XXX variables
# with a default in case anything fails, for example when using git-svn
set(MY_WC_HASH "unknown")
set(MY_WC_BRANCH "unknown")
set(MY_WC_COMMIT_TIMESTAMP 0)
# Guess if this is a git working copy and then look up the revision
if(EXISTS ${SOURCE_DIR}/.git)
execute_process(COMMAND git rev-parse --abbrev-ref HEAD
WORKING_DIRECTORY ${SOURCE_DIR}
OUTPUT_VARIABLE MY_WC_BRANCH
OUTPUT_STRIP_TRAILING_WHITESPACE)
if(MY_WC_BRANCH STREQUAL "HEAD")
# Detached HEAD, check whether commit hash is reachable
# in the master branch
execute_process(COMMAND git rev-parse --short=12 HEAD
WORKING_DIRECTORY ${SOURCE_DIR}
OUTPUT_VARIABLE MY_WC_HASH
OUTPUT_STRIP_TRAILING_WHITESPACE)
execute_process(COMMAND git branch --list master blender-v* --contains ${MY_WC_HASH}
WORKING_DIRECTORY ${SOURCE_DIR}
OUTPUT_VARIABLE _git_contains_check
OUTPUT_STRIP_TRAILING_WHITESPACE)
if(NOT _git_contains_check STREQUAL "")
set(MY_WC_BRANCH "master")
else()
execute_process(COMMAND git show-ref --tags -d
WORKING_DIRECTORY ${SOURCE_DIR}
OUTPUT_VARIABLE _git_tag_hashes
OUTPUT_STRIP_TRAILING_WHITESPACE)
execute_process(COMMAND git rev-parse HEAD
WORKING_DIRECTORY ${SOURCE_DIR}
OUTPUT_VARIABLE _git_head_hash
OUTPUT_STRIP_TRAILING_WHITESPACE)
if(_git_tag_hashes MATCHES "${_git_head_hash}")
set(MY_WC_BRANCH "master")
else()
execute_process(COMMAND git branch --contains ${MY_WC_HASH}
WORKING_DIRECTORY ${SOURCE_DIR}
OUTPUT_VARIABLE _git_contains_branches
OUTPUT_STRIP_TRAILING_WHITESPACE)
string(REGEX REPLACE "^\\*[ \t]+" "" _git_contains_branches "${_git_contains_branches}")
string(REGEX REPLACE "[\r\n]+" ";" _git_contains_branches "${_git_contains_branches}")
string(REGEX REPLACE ";[ \t]+" ";" _git_contains_branches "${_git_contains_branches}")
foreach(_branch ${_git_contains_branches})
if(NOT "${_branch}" MATCHES "\\(HEAD.*")
set(MY_WC_BRANCH "${_branch}")
break()
endif()
endforeach()
unset(_branch)
unset(_git_contains_branches)
endif()
unset(_git_tag_hashes)
unset(_git_head_hashs)
endif()
unset(_git_contains_check)
else()
execute_process(COMMAND git log HEAD..@{u}
WORKING_DIRECTORY ${SOURCE_DIR}
OUTPUT_VARIABLE _git_below_check
OUTPUT_STRIP_TRAILING_WHITESPACE
ERROR_QUIET)
if(NOT _git_below_check STREQUAL "")
# If there're commits between HEAD and upstream this means
# that we're reset-ed to older revision. Use its hash then.
execute_process(COMMAND git rev-parse --short=12 HEAD
WORKING_DIRECTORY ${SOURCE_DIR}
OUTPUT_VARIABLE MY_WC_HASH
OUTPUT_STRIP_TRAILING_WHITESPACE)
else()
execute_process(COMMAND git rev-parse --short=12 @{u}
WORKING_DIRECTORY ${SOURCE_DIR}
OUTPUT_VARIABLE MY_WC_HASH
OUTPUT_STRIP_TRAILING_WHITESPACE
ERROR_QUIET)
if(MY_WC_HASH STREQUAL "")
# Local branch, not set to upstream.
# Well, let's use HEAD for now
execute_process(COMMAND git rev-parse --short=12 HEAD
WORKING_DIRECTORY ${SOURCE_DIR}
OUTPUT_VARIABLE MY_WC_HASH
OUTPUT_STRIP_TRAILING_WHITESPACE)
endif()
endif()
if(MY_WC_BRANCH MATCHES "^blender-v")
set(MY_WC_BRANCH "master")
endif()
unset(_git_below_check)
endif()
execute_process(COMMAND git log -1 --format=%ct
WORKING_DIRECTORY ${SOURCE_DIR}
OUTPUT_VARIABLE MY_WC_COMMIT_TIMESTAMP
OUTPUT_STRIP_TRAILING_WHITESPACE)
# May fail in rare cases
if(MY_WC_COMMIT_TIMESTAMP STREQUAL "")
set(MY_WC_COMMIT_TIMESTAMP 0)
endif()
# Update GIT index before getting dirty files
execute_process(COMMAND git update-index -q --refresh
WORKING_DIRECTORY ${SOURCE_DIR}
OUTPUT_STRIP_TRAILING_WHITESPACE)
execute_process(COMMAND git diff-index --name-only HEAD --
WORKING_DIRECTORY ${SOURCE_DIR}
OUTPUT_VARIABLE _git_changed_files
OUTPUT_STRIP_TRAILING_WHITESPACE)
if(NOT _git_changed_files STREQUAL "")
string(APPEND MY_WC_BRANCH " (modified)")
else()
# Unpushed commits are also considered local modifications
execute_process(COMMAND git log @{u}..
WORKING_DIRECTORY ${SOURCE_DIR}
OUTPUT_VARIABLE _git_unpushed_log
OUTPUT_STRIP_TRAILING_WHITESPACE
ERROR_QUIET)
if(NOT _git_unpushed_log STREQUAL "")
string(APPEND MY_WC_BRANCH " (modified)")
endif()
unset(_git_unpushed_log)
endif()
unset(_git_changed_files)
endif()
# BUILD_PLATFORM is taken from CMake
# but BUILD_DATE and BUILD_TIME are platform dependent
if(NOT BUILD_DATE)
string(TIMESTAMP BUILD_DATE "%Y-%m-%d" UTC)
endif()
if(NOT BUILD_TIME)
string(TIMESTAMP BUILD_TIME "%H:%M:%S" UTC)
endif()
# Write a file with the BUILD_HASH define
file(WRITE buildinfo.h.txt
"#define BUILD_HASH \"${MY_WC_HASH}\"\n"
"#define BUILD_COMMIT_TIMESTAMP ${MY_WC_COMMIT_TIMESTAMP}\n"
"#define BUILD_BRANCH \"${MY_WC_BRANCH}\"\n"
"#define BUILD_DATE \"${BUILD_DATE}\"\n"
"#define BUILD_TIME \"${BUILD_TIME}\"\n"
"#include \"buildinfo_static.h\"\n"
)
# cleanup
unset(MY_WC_HASH)
unset(MY_WC_COMMIT_TIMESTAMP)
unset(MY_WC_BRANCH)
unset(BUILD_DATE)
unset(BUILD_TIME)
# Copy the file to the final header only if the version changes
# and avoid needless rebuilds
# TODO: verify this comment is true, as BUILD_TIME probably changes
execute_process(COMMAND ${CMAKE_COMMAND} -E copy_if_different
buildinfo.h.txt buildinfo.h)
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