arch-packages.sh

#!/usr/bin/env bash
#
# A simple script in bash to list Arch
# packages with some nifty improvements.
#
# usage: packages {option}
# options:
#   installed         lists user installed packages
#   dependencies      lists dependency packages
#   history           lists install history
#   removed           lists uninstall history
#   ignored           lists ignored packages
#   optional          lists optional packages
#   unrequired        lists unrequired packages
#   backup            write all outputs to folder
#   log               show pacman log

function help {
    head -n 15 "$0" | tail -n 10 | cut -c3-; }

function pacman_packages {
    comm -23 <(pacman -Qq | sort) <((pacman -Sl core && pacman -Sg base-devel) | cut -f2 -d' ' | sort -u); }

function pacman_dependencies {
    pacman -Qndtq; }

function pacman_history {
    cat /var/log/pacman.log |
    grep installed -w |
    grep 'ALPM-SCRIPTLET' -v  |
    grep -v warning: |
    sed 's/].*]//;s/ installed / /;s/ (.*//;s/T.* / /;s/ .* / /;s/\[//'; }

function pacman_removed {
    cat /var/log/pacman.log |
    grep removed -w |
    grep 'ALPM-SCRIPTLET' -v  |
    grep -v warning: |
    sed 's/].*]//;s/ removed / /;s/ (.*//;s/T.* / /;s/ .* / /;s/\[//'; }

function pacman_ignored {
    grep IgnorePkg /etc/pacman.conf -w |
    tail -n1 |
    sed 's/.*= //'; }

function pacman_log {
    less /var/log/pacman.log; }

function pacman_optional {
    (pacman -Qqnt && pacman -Qqntt) |
    sort |
    uniq -u; }

function pacman_unrequired {
    comm -23 <(pacman -Qqnt | sort) <((pacman -Sl core && pacman -Sg base-devel) | cut -f2 -d' ' | sort -u); }

function pacman_backup {
    packages > packages.txt
    packages-dependencies > packages-dependencies.txt
    packages-ignored > packages-ignored.txt
    packages-optional > packages-optional.txt
    packages-unrequired > packages-unrequired.txt
    pacman -Qqm > packages-AUR.txt; }

case "$1" in

    dependencies)
        pacman_dependencies
        ;;

    history)
        pacman_history
        ;;

    removed)
        pacman_removed
        ;;

    ignored)
        pacman_ignored
        ;;

    log)
        pacman_log
        ;;

    optional)
        pacman_optional
        ;;

    unrequired)
        pacman_unrequired
        ;;

    backup)
        pacman_backup
        ;;

    help|-h)
        help
        ;;

    *|installed) # default
        pacman_packages
        ;;

esac