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# This file is part of Projecteur - https://github.com/jahnf/projecteur - See LICENSE.md and README.md
cmake_minimum_required(VERSION 3.6)
# Try to get the Linux distribution and version as a string (host system)
# When cross compiling this function won't work to get the target distribution.
function(get_linux_distribution VAR_DIST_NAME VAR_DIST_VERSION)
# Set fallback defaults
set(DIST_NAME "linux")
set(DIST_NAME_SET 0)
set(DIST_VERSION "unknown")
set(DIST_VERSION_SET 0)
# Read os- lsb-... release files
file(GLOB rel_info_files "/etc/*-release")
foreach(info_file IN LISTS rel_info_files)
file(STRINGS "${info_file}" file_lines LIMIT_COUNT 128)
list(APPEND rel_info_all "${file_lines}")
endforeach()
# Get distribution id/name - try different keys
foreach(var ID DISTRIB_ID NAME)
foreach(line IN LISTS rel_info_all)
if( "${line}" MATCHES "^${var}=[\"]?([^ \"]*)")
string(STRIP "${CMAKE_MATCH_1}" DIST_NAME)
string(TOLOWER "${DIST_NAME}" DIST_NAME)
string(REPLACE "\\" "_" DIST_NAME "${DIST_NAME}")
string(REPLACE "/" "_" DIST_NAME "${DIST_NAME}")
set(DIST_NAME_SET 1)
break()
endif()
endforeach()
if(DIST_NAME_SET)
break()
endif()
endforeach()
# Get distribution version/release - try different keys
foreach(var VERSION_ID DISTRIB_RELEASE VERSION)
foreach(line IN LISTS rel_info_all)
if( "${line}" MATCHES "^${var}=[\"]?([^ \"]*)")
string(STRIP "${CMAKE_MATCH_1}" DIST_VERSION)
string(TOLOWER "${DIST_VERSION}" DIST_VERSION)
string(REPLACE "\\" "_" DIST_VERSION "${DIST_VERSION}")
string(REPLACE "/" "_" DIST_VERSION "${DIST_VERSION}")
set(DIST_VERSION_SET 1)
break()
endif()
endforeach()
if(DIST_VERSION_SET)
break()
endif()
endforeach()
if(NOT DIST_NAME_SET)
message(STATUS "Could not get linux distribution id, defaulting to 'linux'")
endif()
if(NOT DIST_VERSION_SET)
message(STATUS "Could not get linux version, defaulting to 'unknown'")
endif()
set(${VAR_DIST_NAME} "${DIST_NAME}" PARENT_SCOPE)
set(${VAR_DIST_VERSION} "${DIST_VERSION}" PARENT_SCOPE)
endfunction()
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