a function to check MIUI version when installing magisk module.

check-MIUI-version.sh

# check MIUI version
# for Magisk only
# author: cjybyjk @ coolapk
# usage: append to config.sh

# $1:requireVersion
checkMIUIver() {
    local requiredVersion="$1"
    local arrRequiredVersion=(${requiredVersion//./ })
    local nowVersion="`grep_prop ro.build.version.incremental`"
    local arrNowVersion=(${nowVersion//./ })
    local isLowerVer=false
    for i in $(seq 0 2)
    do
        if [ ${arrRequiredVersion[$i]} -gt ${arrNowVersion[$i]} ]; then
            isLowerVer=true
            break
        elif [ ${arrRequiredVersion[$i]} -lt ${arrNowVersion[$i]} ]; then
            break
        fi
    done
    if $isLowerVer ; then
        ui_print "! Your MIUI version is less than required MIUI version."
        ui_print "  Your MIUI version: $nowVersion"
        ui_print "  Required MIUI version: $requiredVersion"
        return 1
    fi
    return 0
}

checkMIUIver "8.0.0" # replace 8.0.0 to your own version
[ $? -ne 0 ] && exit 1