aptsearch

#!/bin/zsh

# Debian apt search helper. Uses aptitude search first;
# if no results, calls apt-file search instead.

# Misc aptitude notes:
#
# aptitude search reference:
# https://www.debian.org/doc/manuals/aptitude/ch02s04s05.en.html
#
# There doesn't seem to be any way to exclude all those i386 packages
# when searching, so search results are twice as long as they need to be
# if you have dual architectures installed (e.g. for wine).
#
# aptitude's notion of "description" is the long description, not the
# short one that shows up in aptitude search. So if you search on ~d
# (-D in this function) you'll get matches that don't include the search
# term anywhere. -d in this function implies -D but then greps the output
# to ensure the search term is there.

aptsearch_usage() {
    echo "Usage: aptsearch [-idD] pattern"
    echo "-i: show only packages already installed"
    echo "-d: search in package descriptions"
    echo "-D: search in package long descriptions"
    echo "    (which don't show up in aptitude search output"
}

local OPTIND o only_installed description
while getopts ":idD" o; do
    case "${o}" in
        i)
            only_installed=1
            ;;
        d)
            shortdesc=1
            description=1
            ;;
        D)
            description=1
            ;;
        *)
            aptsearch_usage
            return
            ;;
    esac
done
shift $((OPTIND-1))

# Search for only installed packages:
# packages whose name contains bash: aptitude search '~i bash'
# also, aptitude search '?narrow(?installed, …)'
# packages whose description contains bash: aptitude search '~i ~d bash'
# packages that are not installed: aptitude search '!~i bash'
if [[ $only_installed ]]; then
    argstr='~i '
else
    argstr=''
fi

if [[ $description ]]; then
    argstr="${argstr}~d "
fi

if [[ $argstr != "" ]]; then
    argstr="${argstr} $*"
else
    argstr="$*"
fi

if [[ $shortdesc ]]; then
    # restrict output to lines actually containing the search term
    echo "aptitude search \"${argstr}\" | grep $1"
    echo
    aptitude search "${argstr}" | grep "$1" | egrep -v '( - $|:i386)'
else
    echo "aptitude search \"${argstr}\""
    echo
    aptitude search "${argstr}" | egrep -v '( - $|:i386)'
fi

# If aptitude search found nothing, try apt-file search
if [ $? -ne 0 ]; then
    echo "=== No packages found by that name. Looking for files:"
    echo "apt-file search \"${argstr}\""
    apt-file search "${argstr}"
fi