Script to list updated packages without root

xupdates.sh

#!/bin/sh

set -eu

argv0="$0"

usage() {
    printf 'usage: %s [-s] [-m] [-h] [package...]\n' "$argv0"
}

mode=a

while [ $# -gt 0 ]
do
    arg="$1"
    if [ "$(printf %.1s "$1")" != - -o "$1" = -- ]
    then
        break
    fi
    shift 1

    case "$arg" in
    -s) mode=s ;; # show selected packages updates
    -m) mode=m ;; # show selected and manually installed packages updates
    -h) usage
        exit 0
        ;;
    -*) usage >&2
        exit 1
        ;;
    esac
done

all="$(mktemp)"
selected="$(mktemp)"
manuall="$(mktemp)"

cleanup() {
    rm -f -- "$all" "$selected" "$manuall"
}

trap cleanup EXIT INT HUP

strip_version() {
    sed -E 's/(.+)-[^-]+/\1/'
}

xbps-install -Mun | cut -d' ' -f1 | strip_version > "$all"
printf '%s\n' "$@" | sort | comm -12 "$all" - > "$selected"
xbps-query -mp pkgname | strip_version | comm -12 "$all" - > "$manuall"

case "$mode" in
s)
    cat "$selected"
    ;;
m)
    cat "$selected"
    comm -13 "$selected" "$manuall"
    ;;
a)
    cat "$selected"
    comm -13 "$selected" "$manuall"
    sort "$selected" "$manuall" | comm -23 "$all" -
    ;;
esac