# ------------------------------------------------------------------------------
# Distribution upgrade module, should be ran prior any other module (also
# configure APT)
# 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
# ------------------------------------------------------------------------------
# Variable:
#   * PROXY_APT: Proxy to use with APT (eg. APT Cacher), optionnal
#   * PROXY_APT_PORT: Working port for APT proxy if one declared
#   * PROXY_SRV: General purpose proxy if PROXY_APT is undefined
#   * PROXY_SRV_PORT: Working port for general purpose proxy if one declared
# TODO: Split apt conf and actuel update to avoid repeating configuration if
#       for a reason apt fail
# TODO: This is Debian only, make this universal (at least yum/dnf compatible)
# ------------------------------------------------------------------------------

export VER_upgrade_dist="0.2.5"

# As aptitude might fail if clock is too far from real time, we need to depend
# on ntp
export DEP_upgrade_dist="conf_ntp"

upgrade_dist()
{
    local proxyfile=/etc/apt/apt.conf.d/00proxy
    local norecommends=/etc/apt/apt.conf.d/99no-recommends

    # We backup entire apt dir
    backup_dist /etc/apt
    prnt I "Basic apt configuration..."

    # TODO: No recommend section should be optionnal
    tag_file $norecommends
    {
        echo 'APT::Install-Recommends "false";'
        echo 'APT::AutoRemove::RecommendsImportant "false";'
        echo 'APT::AutoRemove::SuggestsImportant "false";'
    }  >> $norecommends

    prnt I "Configuring proxy for APT..."
    if [[ -n $PROXY_APT ]]; then
        if [[ ! -d $(dirname $proxyfile) ]]; then
            mkdir -pv "$(dirname $proxyfile)" || (
                prnt E "Impossible to create directory to receive APT configuration."
                die 60
            )
        else
            # Cleanup
            if [[ -s $proxyfile ]]; then
                true > "$proxyfile"
            fi
            if grep -q "^Acquire::http::Proxy" /etc/apt/apt.conf; then
                sed -i -e "/^Acquire::http::Proxy/d" /etc/apt/apt.conf
            fi
        fi
        tag_file $proxyfile
        echo "Acquire::http::Proxy \"http://${PROXY_APT}:${PROXY_APT_PORT}\";" >> $proxyfile
    elif [[ -n $PROXY_SRV ]]; then
        tag_file $proxyfile
        echo "Acquire::http::Proxy \"http://${PROXY_SRV}:${PROXY_SRV_PORT}\";" >> $proxyfile
    else
        prnt I "No proxy configured, nothing to do."
    fi

    # Remplace source.list from dist with ours (be smarter)
    install_file "pkgman/${SYS_DIST}_${SYS_VER}.list" /etc/apt/sources.list

    prnt I "Updating package list..."
    pkgupdt

    prnt I "Applying packages upgrades..."
    pkgupgd

    prnt I "Deleting no longer needed packages..."
    pkgautorm
}

precheck_upgrade_dist()
{
    prnt I "Checking network connectivity..."

    if [[ $(noerror wget -q --tries=10 --timeout=20 --spider http://www.tetaneutral.net) != 0 ]]; then
        prnt E "It seems network configuration is not functionnal! Giving up."
        die 160
    fi
    if [[ -n $PROXY_APT && -z $PROXY_APT_PORT ]]; then
        prnt E "An APT proxy server have been specified but not its working port."
        die 160
    fi
    if [[ -n $PROXY_SRV && -z $PROXY_SRV_PORT ]]; then
        prnt E "A general proxy server have been specified but not its working port."
        die 160
    fi
    file_must_exists pkgman/${SYS_DIST}_${SYS_VER}.list
}

cron_upgrade_dist()
{
    pkgupdt
    pkgupgd
}


export -f upgrade_dist
export -f precheck_upgrade_dist

# EOF