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108 lines
3.6 KiB
108 lines
3.6 KiB
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# Copyright (C) 2011-2020 Daniel Scharrer |
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# |
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# This software is provided 'as-is', without any express or implied |
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# warranty. In no event will the author(s) be held liable for any damages |
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# arising from the use of this software. |
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# |
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# Permission is granted to anyone to use this software for any purpose, |
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# including commercial applications, and to alter it and redistribute it |
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# freely, subject to the following restrictions: |
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# |
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# 1. The origin of this software must not be misrepresented; you must not |
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# claim that you wrote the original software. If you use this software |
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# in a product, an acknowledgment in the product documentation would be |
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# appreciated but is not required. |
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# 2. Altered source versions must be plainly marked as such, and must not be |
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# misrepresented as being the original software. |
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# 3. This notice may not be removed or altered from any source distribution. |
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cmake_minimum_required(VERSION 2.8...3.19) |
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# CMake script that reads a VERSION file and the current git history and the calls configure_file(). |
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# This is used by version_file() in VersionString.cmake |
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if((NOT DEFINED INPUT) OR (NOT DEFINED OUTPUT) OR (NOT DEFINED VERSION_SOURCES) OR (NOT DEFINED GIT_DIR)) |
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message(SEND_ERROR "Invalid arguments.") |
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endif() |
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get_filename_component(VERSION_SCRIPT_DIR "${CMAKE_CURRENT_LIST_FILE}" PATH) |
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include("${VERSION_SCRIPT_DIR}/VersionString.cmake") |
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# configure_file doesn't handle newlines correctly - pre-escape variables |
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macro(_version_escape var string) |
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# Escape the escape character and quotes |
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string(REGEX REPLACE "([\\\\\"])" "\\\\\\1" ${var} "${string}") |
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# Pull newlines out of string |
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string(REGEX REPLACE "\n" "\\\\n\"\n\t\"" ${var} "${${var}}") |
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endmacro() |
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set(var "") |
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foreach(arg IN LISTS VERSION_SOURCES) |
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if(var STREQUAL "") |
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set(var ${arg}) |
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else() |
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parse_version_file(${var} "${arg}" ON) |
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set(var "") |
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endif() |
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endforeach() |
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# Check for a git directory and fill in the git commit hash if one exists. |
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unset(GIT_COMMIT) |
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if(NOT GIT_DIR STREQUAL "") |
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unset(git_head) |
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if(GIT_COMMAND) |
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execute_process( |
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COMMAND "${GIT_COMMAND}" "--git-dir=${GIT_DIR}" "rev-parse" "HEAD" |
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RESULT_VARIABLE result |
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OUTPUT_VARIABLE git_head |
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) |
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if(NOT "${result}" EQUAL 0) |
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unset(git_head) |
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endif() |
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endif() |
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if(NOT git_head AND EXISTS "${GIT_DIR}/HEAD") |
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file(READ "${GIT_DIR}/HEAD" git_head) |
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if(git_head MATCHES "^[ \t\r\n]*ref\\:(.*)$") |
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# Remove the first for characters from git_head to get git_ref. |
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# We can't use a length of -1 for string(SUBSTRING) as cmake < 2.8.5 doesn't support it. |
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string(LENGTH "${git_head}" git_head_length) |
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math(EXPR git_ref_length "${git_head_length} - 4") |
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string(SUBSTRING "${git_head}" 4 ${git_ref_length} git_ref) |
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string(STRIP "${git_ref}" git_ref) |
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unset(git_head) |
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if(EXISTS "${GIT_DIR}/${git_ref}") |
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file(READ "${GIT_DIR}/${git_ref}" git_head) |
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elseif(EXISTS "${GIT_DIR}/packed-refs") |
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file(READ "${GIT_DIR}/packed-refs" git_refs) |
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string(REGEX REPLACE "[^0-9A-Za-z]" "\\\\\\0" git_ref "${git_ref}") |
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string(REGEX MATCH "[^\r\n]* ${git_ref}( [^\r\n])?" git_head "${git_refs}") |
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endif() |
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endif() |
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endif() |
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# Create variables for all prefixes of the git comit ID. |
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string(REGEX MATCH "[0-9A-Za-z]+" git_commit "${git_head}") |
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string(LENGTH "${git_commit}" git_commit_length) |
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if(NOT git_commit_length LESS 40) |
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string(TOLOWER "${git_commit}" GIT_COMMIT) |
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foreach(i RANGE 20) |
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string(SUBSTRING "${GIT_COMMIT}" 0 ${i} GIT_COMMIT_PREFIX_${i}) |
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set(GIT_SUFFIX_${i} " + ${GIT_COMMIT_PREFIX_${i}}") |
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endforeach() |
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else() |
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message(WARNING "Git repository detected, but could not determine HEAD") |
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endif() |
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endif() |
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configure_file("${INPUT}" "${OUTPUT}")
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