diff options
Diffstat (limited to 'protocols/Telegram/tdlib/td/CMake/GetGitRevisionDescription.cmake')
| -rw-r--r-- | protocols/Telegram/tdlib/td/CMake/GetGitRevisionDescription.cmake | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/protocols/Telegram/tdlib/td/CMake/GetGitRevisionDescription.cmake b/protocols/Telegram/tdlib/td/CMake/GetGitRevisionDescription.cmake new file mode 100644 index 0000000000..b565582098 --- /dev/null +++ b/protocols/Telegram/tdlib/td/CMake/GetGitRevisionDescription.cmake @@ -0,0 +1,127 @@ +# - 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>) +# +# Requires CMake 2.6 or newer (uses the 'function' command) +# +# Original Author: +# 2009-2020 Ryan Pavlik <ryan.pavlik@gmail.com> <abiryan@ryand.net> +# http://academic.cleardefinition.com +# +# Copyright 2009-2013, Iowa State University. +# Copyright 2013-2020, Ryan Pavlik +# Copyright 2013-2020, Contributors +# SPDX-License-Identifier: BSL-1.0 +# 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 ${CMAKE_CURRENT_LIST_FILE} PATH) + +# Function _git_find_closest_git_dir finds the next closest .git directory +# that is part of any directory in the path defined by _start_dir. +# The result is returned in the parent scope variable whose name is passed +# as variable _git_dir_var. If no .git directory can be found, the +# function returns an empty string via _git_dir_var. +# +# Example: Given a path C:/bla/foo/bar and assuming C:/bla/.git exists and +# neither foo nor bar contain a file/directory .git. This wil return +# C:/bla/.git +# +function(_git_find_closest_git_dir _start_dir _git_dir_var) + set(cur_dir "${_start_dir}") + set(git_dir "${_start_dir}/.git") + while (NOT EXISTS "${git_dir}") + # .git dir not found, search parent directories + set(git_previous_parent "${cur_dir}") + get_filename_component(cur_dir "${cur_dir}" DIRECTORY) + if (cur_dir STREQUAL git_previous_parent) + # We have reached the root directory, we are not in git + set(${_git_dir_var} "" PARENT_SCOPE) + return() + endif() + set(git_dir "${cur_dir}/.git") + endwhile() + set(${_git_dir_var} "${git_dir}" PARENT_SCOPE) +endfunction() + +function(get_git_head_revision _refspecvar _hashvar) + _git_find_closest_git_dir("${CMAKE_CURRENT_SOURCE_DIR}" GIT_DIR) + + if (NOT GIT_DIR STREQUAL "") + file(RELATIVE_PATH _relative_to_source_dir "${CMAKE_CURRENT_SOURCE_DIR}" "${GIT_DIR}") + if (_relative_to_source_dir MATCHES "^[.][.]") + # We've gone above the CMake root dir. + set(GIT_DIR "") + endif() + endif() + if (GIT_DIR STREQUAL "") + set(${_refspecvar} "GITDIR-NOTFOUND" PARENT_SCOPE) + set(${_hashvar} "GITDIR-NOTFOUND" PARENT_SCOPE) + return() + endif() + + find_package(Git) + + # Check if the current source dir is a git submodule or a worktree. + # In both cases .git is a file instead of a directory. + # + if ((NOT IS_DIRECTORY ${GIT_DIR}) AND Git_FOUND) + # The following git command will return a non empty string that + # points to the super project working tree if the current + # source dir is inside a git submodule. + # Otherwise the command will return an empty string. + # + execute_process( + COMMAND "${GIT_EXECUTABLE}" rev-parse --show-superproject-working-tree + WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}" + OUTPUT_VARIABLE out + ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE) + if (NOT out STREQUAL "") + # If out is non-empty, GIT_DIR/CMAKE_CURRENT_SOURCE_DIR is in a submodule + file(READ ${GIT_DIR} submodule) + string(REGEX REPLACE "gitdir: (.*)$" "\\1" GIT_DIR_RELATIVE ${submodule}) + string(STRIP ${GIT_DIR_RELATIVE} GIT_DIR_RELATIVE) + get_filename_component(SUBMODULE_DIR ${GIT_DIR} PATH) + get_filename_component(GIT_DIR ${SUBMODULE_DIR}/${GIT_DIR_RELATIVE} ABSOLUTE) + set(HEAD_SOURCE_FILE "${GIT_DIR}/HEAD") + else() + # GIT_DIR/CMAKE_CURRENT_SOURCE_DIR is in a worktree + file(READ ${GIT_DIR} worktree_ref) + # The .git directory contains a path to the worktree information directory + # inside the parent git repo of the worktree. + string(REGEX REPLACE "gitdir: (.*)$" "\\1" git_worktree_dir ${worktree_ref}) + string(STRIP ${git_worktree_dir} git_worktree_dir) + _git_find_closest_git_dir("${git_worktree_dir}" GIT_DIR) + set(HEAD_SOURCE_FILE "${git_worktree_dir}/HEAD") + endif() + else() + set(HEAD_SOURCE_FILE "${GIT_DIR}/HEAD") + endif() + if (NOT EXISTS "${HEAD_SOURCE_FILE}") + return() + endif() + + set(GIT_DATA "${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/git-data") + if (NOT EXISTS "${GIT_DATA}") + file(MAKE_DIRECTORY "${GIT_DATA}") + endif() + set(HEAD_FILE "${GIT_DATA}/HEAD") + configure_file("${HEAD_SOURCE_FILE}" "${HEAD_FILE}" COPYONLY) + + configure_file("${_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() |