eos-update

#!/bin/bash

# Package updater for EndeavourOS and Arch.
# Handles db lock file, keyrings, syncing, and optionally AUR with given AUR helper.

echo2()   { echo "$@" >&2 ; }
printf2() { printf "$@" >&2 ; }
WARN()    { echo2 "==> $progname: warning: $1"; }
DIE()     { echo2 "==> $progname: error: $1"; exit 1;  }

SetHelper() {
    for helper in "$@" "$EOS_AUR_HELPER" "$EOS_AUR_HELPER_OTHER" yay paru pacman ; do
        which "${helper%% *}" &>/dev/null && return 0
    done
    WARN "AUR helper not found"
    helper=pacman
}

Cmd() {                           # Show a command, run it, and exit on issues.
    echo2 "==>" "$@"
    "$@" || DIE "'$*' failed."
}

MirrorCheckResult() {
    local ml="$1"
    local ret=0

    echo2 "==> $ml contains:"
    echo2 "    available mirrors:   ${#supported[@]}"
    echo2 "    unavailable mirrors: ${#unsupported[@]}"
    [ ${#unsupported[@]} -gt 0 ] && printf "%s\n" "${unsupported[@]}" | sed 's|^[0-9]*:|      -> Server = |' >&2

    if [ ${#unsupported[@]} -eq 0 ] && [ ${#supported[@]} -gt 0 ] ; then     # create the return code, 0=success, 1=fail
        return 0
    else
        if [ ${#unsupported[@]} -gt 0 ] ; then
            EditMirrorlist $ml "${unsupported[0]%%:*}"   # second parameter is the line number
        else
            EditMirrorlist $ml
        fi
        return 1
    fi
}

Hardware-x86_64() { [ $(eos_GetArch) = x86_64 ] || DIE "sorry, this implementation supports only x86_64 environment"; }

CheckYourArchMirrorlist() {
    Hardware-x86_64
    local url="https://archlinux.org/mirrorlist/?use_mirror_status=on"
    local lm
    local all_working_mirrors
    local local_mirrors
    local supported=()
    local unsupported=()

    # get working mirrors from the Arch mirrorlist page
    all_working_mirrors=$(curl --fail -Lsm 30 "$url") || DIE "failed to fetch available mirrors (curl code $?)"
    [ "$all_working_mirrors" ] || DIE "-> archlinux.org/mirrorlist failed"
    readarray -t all_working_mirrors <<< $(echo "$all_working_mirrors" | tail -n +7 | grep "^#Server = " | awk '{print $NF}')

    # get mirrors from local mirrorlist
    readarray -t local_mirrors <<< $(grep -n "^[ \t]*Server[ \t]*=[ \t]*" $aml | sed 's|[ \t]*Server[ \t]*=[ \t]*||')

    for lm in "${local_mirrors[@]}" ; do
        if printf "%s\n" "${all_working_mirrors[@]}" | grep "${lm#*:}" >/dev/null ; then
            supported+=("${lm#*:}")
        else
            unsupported+=("$lm")   # includes the line number: "nr:https://..."
        fi
    done
    MirrorCheckResult $aml
}

CheckYourEndeavourosMirrorlist() {
    Hardware-x86_64
    local -r mirrors=(  # for downloading the latest endeavouros-mirrorlist package
        https://mirror.alpix.eu/endeavouros/repo/endeavouros/x86_64     # Germany
        https://mirror.moson.org/endeavouros/repo/endeavouros/x86_64    # Germany
        https://mirrors.gigenet.com/endeavouros/repo/endeavouros/x86_64 # United States
    )
    local url data
    local -r tmpfile=/tmp/eos-ml.p
    local good_mirrors local_mirrors
    local lm
    local unsupported=() supported=()

    # local continent=""
    # [ -x /bin/location ] && continent="$(/bin/location list-countries --show-continent | awk '{print $2}')"
    # case "$continent" in
    #     NA) mirrors=("${mirrors_NA[@]}" "${mirrors_EU[@]}") ;;
    #     *)  mirrors=("${mirrors_EU[@]}" "${mirrors_NA[@]}") ;;
    # esac

    for url in "${mirrors[@]}" ; do
        data=$(curl -Lsm 30 -o- $url)
        if [ $? -eq 0 ] && [ "$data" ] ; then
            data=$(echo "$data" | grep "endeavouros-mirrorlist.*\.sig")   # the line that contains the pkg file name
            data=${data#*\"}                                              # skip prefix
            data=${data%%\.sig*}                                          # skip suffix
            if [ "$data" ] ; then
                unsupported=()
                supported=()

                url+="/$data"
                curl -Lsm 30 -o$tmpfile $url

                good_mirrors=$(tar xvf $tmpfile ${eml:1} -O 2>/dev/null | grep "^Server = " | sed 's|^Server = ||')
                rm -f $tmpfile
                local_mirrors=$(grep -n "^[ \t]*Server[ \t]*=[ \t]*" $eml | sed 's|[ \t]*Server[ \t]*=[ \t]*||')

                for lm in $local_mirrors ; do
                    if [ "$(echo "$good_mirrors" | grep "${lm#*:}")" ] ; then
                        supported+=(${lm#*:})
                    else
                        unsupported+=($lm)  # includes the line number: "nr:https://..."
                    fi
                done
                MirrorCheckResult $eml
                return
            fi
            
        fi
    done
    [ "$data" ] || DIE "sorry, cannot fetch the latest EndeavourOS mirrorlist data"
}

EditMirrorlist() {
    local list="$1"      # arch, endeavouros, or the full path of the mirrorlist
    local linenr="$2"    # for the editor; may be empty
    local editor=/usr/bin/rnano
    [ -x $editor ] || { WARN "package 'nano' is required for editing $list"; return 1; }

    case "$list" in
        arch | $aml)        list="$aml" ;;
        endeavouros | $eml) list="$eml" ;;
        "") DIE "supported mirrorlists: arch, endeavouros" ;;
    esac
    if [ "$linenr" ] ; then
        if [ -z "${linenr//[0-9]/}" ] ; then
            linenr="+$linenr"
        else
            WARN "detected line number '$linenr' in $list is flawed!"
            linenr=""
        fi
    fi
    RunInTerminal "echo 'Starting to edit $list:'; sudo $editor $linenr $list"
}

ResetKeyrings() {
    Cmd sudo mv /etc/pacman.d/gnupg /root/pacman-key.bak.$(date +%Y%m%d-%H%M).by.$progname
    Cmd sudo pacman-key --init
    Cmd sudo pacman-key --populate archlinux endeavouros
    Cmd sudo pacman -Syy --noconfirm archlinux-keyring endeavouros-keyring
    Cmd sudo pacman -Syu
    echo2 "Keyrings reset."
    exit 0
}

ClearDatabases() {
    Cmd sudo rm /var/lib/pacman/sync/*
    echo2 "Package databases cleared."
    exit 0
}

OptionCheck() {
    case "$1" in
        --nvidia) IsSupportedOS "$1" || return 1 ;;
    esac
    return 0
}

Options() {
    local opts
    local lopts="aur,clear-databases,dump-options,keyrings-reset,nvidia,nvidia-auto,no-keyring,no-sync,helper:"
    lopts+=",min-free-bytes:,pacdiff,paru,yay,pacman,help"
    lopts+=",show-only-fixed,show-upstream-news,check-mirrors-arch,check-mirrors-eos,check-mirrors,edit-mirrorlist:"
    local sopts="h"

    opts="$(LANG=C /usr/bin/getopt -o=$sopts --longoptions $lopts --name "$progname" -- "$@")" || {
        echo2 "==> more info with command: $progname --help"
        exit 1
    }
    eval set -- "$opts"

    local ret=0
    while true ; do
        case "$1" in
            --check-mirrors)                     CheckYourEndeavourosMirrorlist || ((ret++))
                                                 CheckYourArchMirrorlist        || ((ret++))
                                                 exit $ret
                                                 ;;
            --check-mirrors-arch)                CheckYourArchMirrorlist || ((ret++))
                                                 exit $ret
                                                 ;;
            --check-mirrors-eos)                 CheckYourEndeavourosMirrorlist || ((ret++))
                                                 exit $ret
                                                 ;;
            --edit-mirrorlist)                   EditMirrorlist "$2"; exit 0 ;;
            --nvidia)                            OptionCheck "$1" && nvidia=yes ;;
            --no-keyring)                        keyring=no ;;
            --no-sync)                           sync=":" ;;
            --keyrings-reset)                    ResetKeyrings ;;
            --clear-databases)                   ClearDatabases ;;
            --min-free-bytes)                    min_free_bytes="$2" ; shift ;;
            --helper)                            SetHelper "$2" ; shift ;;
            --aur)                               SetHelper ;;
            --paru | --yay | --pacman)           SetHelper "${1/--/}" ;;
	    --pacdiff)                           pacdiffer="$pacdiffer_cmd_default" ;;
            --show-only-fixed)
                which arch-audit >/dev/null && arch-audit -u
                exit
                ;;
            --show-upstream-news)
                local br=$(eos_select_browser)
                [ "$br" ] && $br https://archlinux.org/news
                exit
                ;;
            --dump-options)
                lopts="${lopts//:/}"
                lopts="--${lopts//,/ --}"
                sopts="${sopts//:/}"
                sopts="$(echo "$sopts" | sed -E 's|([a-z])| -\1|g')"
                echo $lopts $sopts
                exit 0
                ;;

            -h | --help) Usage; exit 0 ;;
            
            --) shift ; break ;;
        esac
        shift
    done
}

Usage() {
    cat <<EOF
$progname is a package updater for EndeavourOS and Arch.

$progname is implemented as a wrapper around commands pacman and optionally yay/paru.
Essentially runs commands 'pacman -Syu' and optionally 'yay -Sua' or 'paru -Sua'.

$progname includes (by default) special help in the following situations:
- A dangling pacman db lock file (/var/lib/pacman/db.lck).
- Disk space availability for updates (with a configurable minimum space).
- Keyring package updating before updating other packages.
- Running the 'sync' command after update.

Optional help:
- Can clear package databases in case of constant problems with them.
- Can reset keyrings in case of constant problems with them.
- Can check the validity of the locally configured lists of mirrors.
- Updates AUR packages (with option --helper, see Usage below).
- Ad hoc check for Nvidia GPU driver vs. kernel updates (non-dkms only).

Usage: $progname [options]
Options:
  --help, -h              This help.
  --check-mirrors         Check files $eml and $aml
                          for unsupported mirrors.
                          This may be useful when one or more mirrors start failing unexpectedly.
                          Note: only x86_64 hardware is supported.
  --check-mirrors-eos     Check file $eml for unsupported mirrors.
  --check-mirrors-arch    Check file $aml for unsupported mirrors.
  --edit-mirrorlist       Edit chosen mirrorlist file. Supported: arch, endeavouros. No default.
  --nvidia                Check also nvidia driver vs. kernel updates. Useful only with the Nvidia GPU.
  --clear-databases       Clears package database files.
                          Use this only if package database issues constantly make system update fail.
  --keyrings-reset        Resets Arch and EndeavourOS keyrings.
                          Use this only if keyring issues constantly make system update fail.
  --no-keyring            Do not try to update keyrings first.
  --no-sync               Do not run 'sync' after update.
  --show-only-fixed       Show only packages that have already been fixed (runs: arch-audit -u) and exit.
  --show-upstream-news    Show the news page of the upstream site and exit.
  --pacdiff		  Run eos-pacdiff in the end of $progname. See also EOS_UPDATE_PACDIFFER
  			  in file /etc/eos-script-lib-yad.conf.
  --helper                AUR helper name. Supported: yay, paru, pacman.
                          Default: pacman
                          Other AUR helpers supporting option -Sua like yay should work as well.
  --paru                  Same as --helper=paru.
  --yay                   Same as --helper=yay.
  --aur                   Uses the AUR helper configured in /etc/eos-script-lib-yad.conf.
  --pacman                Same as --helper=pacman. Default. (Note: pacman does not support AUR directly).
  --min-free-bytes        Minimum amount of free space (in bytes) that the root partition should have
                          before updating. Otherwise a warning message will be displayed.
                          Default: $min_free_bytes

Tip: create an alias in file ~/.bashrc for $progname to have the options you need, for example:

     # Enable Nvidia update check, disable sync execution, use paru for AUR updates.
     alias $progname='$progname --nvidia --no-sync --paru'

EOF
}

IsSupportedOS() {
    if [ -x /usr/bin/eos-kernel-nvidia-update-check ] ; then
        return 0
    else
        WARN "the Nvidia check requires package 'eos-bash-shared' fully installed, option $1 ignored."
        return 1
    fi
}

DiskSpace() {
    local available=$(findmnt / -nbo avail)
    local min=$min_free_bytes

    if [ $available -lt $min ] ; then
        {
            WARN "your root partition (/) has only $available bytes of free space."
            if [ $(du -b -d0 /var/cache/pacman/pkg | awk '{print $1}') -gt $min ] ; then
                printf "\nFor example, cleaning up the package cache may help.\n"
                printf "Command 'sudo paccache -rk1' would do this:"
                paccache -dk1
                printf "Command 'sudo paccache -ruk0' would do this:"
                paccache -duk0
                echo ""
            fi
        } >&2
    fi
}

echo2blue()  { echo2 "${BLUE}$1${RESET}" ; }
echo2green() { echo2 "${GREEN}$1${RESET}" ; }

Main() {
    local progname="${0##*/}"
    source /usr/share/endeavouros/scripts/eos-script-lib-yad || return 1
    local helper="pacman"
    local min_free_bytes=$((1000 * 1000 * 1000))  # default: 1 GB

    local lock=/var/lib/pacman/db.lck
    local rmopt=f

    local pacdiffer=""                            # default = "" because pacdiff can change critical files
    local -r pacdiffer_cmd_default="eos-pacdiff --quiet"
    local subopts=()
    local afteropts=()
    local keyring=yes                             # user may disable keyring check with --no-keyring
    local nvidia=no                               # user may enable Nvidia check with --nvidia
    local nvidia_opt=""
    local sync="sync"
    local -r eml=/etc/pacman.d/endeavouros-mirrorlist
    local -r aml=/etc/pacman.d/mirrorlist

    local -r RED=$'\e[0;91m'
    local -r GREEN=$'\e[0;92m'
    local -r BLUE=$'\e[0;94m'
    local -r MAGENTA=$'\e[0;95m'
    local -r RESET=$'\e[0m'

    Options "$@"

    [ "$EOS_UPDATE_PACDIFFER" ] && pacdiffer="$EOS_UPDATE_PACDIFFER"

    [ $nvidia  = yes ] && subopts+=(--nvidia)
    [ $keyring = yes ] && subopts+=(--keyrings)

    echo2blue "$progname: package updater with additional features"

    DiskSpace

    if [ -e $lock ] && fuser $lock &>/dev/null ; then
        rmopt=i
    fi
    local cmdfile=$(mktemp "$HOME/.$progname.helper.XXX")
    case "$helper" in
	pacman)
            echo2green "Updating native apps..."
	    cat <<EOF > "$cmdfile"
#!/bin/bash

eos_update_sudofunc() {
    rm -$rmopt $lock
    if [ ! -e $lock ] ; then
        pacman -Sy                         || return
        ${progname}-extras "${subopts[@]}" || return
        pacman -Su                         || return
        $pacdiffer
        $sync
   fi
}
eos_update_sudofunc
EOF
	    ;;
	*)
            echo2green "Updating native and AUR apps..."
            local helper2="/usr/bin/sudo -u $LOGNAME $helper -Sua"
	    cat <<EOF > "$cmdfile"
#!/bin/bash

eos_update_sudofunc() {
    rm -$rmopt $lock
    if [ ! -e $lock ] ; then
        pacman -Sy                        || return
        ${progname}-extras "${subopts[@]}" || return
        pacman -Su                        || return
        $helper2                          || return             # Note: 'paru' returns 1 on error, but 'yay' does not!
        $pacdiffer
        $sync
    fi
}
eos_update_sudofunc
EOF
	    ;;
    esac
    chmod u+x,go-rwx "$cmdfile"
    sudo "$cmdfile"
    rm -f "$cmdfile"
}

Main "$@"