# ------------------------------------------------------------------------------
# Version determination function
# This file is part of the init.sh project
# Copyright (c) 2019-2021 Geoffray Levasseur <fatalerrors@geoffray-levasseur.org>
# ------------------------------------------------------------------------------
# This file is distributed under 3-clause BSD license.
# The complete license agreement can be obtained at:
# https://opensource.org/licenses/BSD-3-Clause
# ------------------------------------------------------------------------------

# ------------------------------------------------------------------------------
# Return on stdout $distro $version $codename
get_os_version()
{
    if [[ ! -f /etc/os-release ]]; then
        prnt E "get_os_version(): Your distribution doesn't have the needed os-release file."
        die 8 --force
    fi

    # Create a sub-shell to avoid polluting the environnement
    (
        # Iniitalise version codename in case the var don't exists
        VERSION_CODENAME="NULL"

        # Import the file in the environment
        source /etc/os-release

        if [[ -z $ID ]]; then
            prnt E "get_os_version(): Your /etc/os-release file mises some vital information."
            die --force 8
        fi

        if [[ -z $VERSION_ID ]]; then
            local maj=$(uname -r | cut -d'.' -f1)
            local min=$(uname -r | cut -d'.' -f2)
            VERSION_ID="$maj.$min"
            unset maj min
        fi

        # Return values on stdout
        echo ${ID,,} ${VERSION_ID} ${VERSION_CODENAME,,}
    )
}
export read_os_release


# ------------------------------------------------------------------------------
# Create system related variables
# ------------------------------------------------------------------------------
set_sys_vars()
{
    if [[ $# -ne 4 ]]; then
        prnt E "set_sys_vars(): Incorrect number of parameters ($@)."
        die --force 7
    fi

    export SYS_ARCH=$1
    export SYS_DIST=$2
    export SYS_VER=$3
    if [[ $4 != "null" ]]; then
        export SYS_CODE=$4
    elif [[ -n $SYS_CODE ]]; then
        unset SYS_CODE
    fi
}
export -f get_os_version

# EOF