pacaur completion.sh

#!/bin/bash
# the path to this file should be /etc/bash_completion.d/pacaur
# to use it without reloading your shell: $ source /etc/bash_completion.d/pacaur

_pacaur() 
{
    # nullglob avoids problems when no results are found (copied from cower's autocomplete)
    [[ -o nullglob ]] || { shopt -s nullglob; ng=1; }

    ##define variables
    local cur prev operations options
    COMPREPLY=()
    cur="${COMP_WORDS[COMP_CWORD]}"
    prev="${COMP_WORDS[COMP_CWORD-1]}"
    # I only use pacaur to handle the AUR, operations that wrap pacman operations are not completed: -S, -Ss, -Si, -Sii, -Sw. -Su, -Qu, -Sc, -Scc
    operations="-s --search -i --info -d --download -m --makepkg -y --sync -k --check -u --update -v --version -h --help"
    options="-f --force -e --edit -q --quiet -c --clean -a --aur -r --repo --devel --ignore --noconfirm --noedit --rebuild --asroot --carch -v --version -h --help"

    # define a function that checks whether the whole line contains one of the words passed to it
    searchfor() { echo "${COMP_LINE}" | grep -q -- "$(echo "$1" | sed 's/ /\\\|/g')"; }

    ## completion of operations and options
    # complete operations when only 'pacaur -' is given
    if [[ "${prev}" == "pacaur" ]]; then 
        COMPREPLY=( $(compgen -W "${operations}" -- "${cur}") )
    # complete options after '-' when an operations is already given
    elif [[ "${cur}" == -* ]] && searchfor "${operations}" ; then 
       COMPREPLY=( $(compgen -W "${options}" -- "${cur}") )

    ## completion of package names
    # there is no package name completing for -i --info -v --version
    # complete with all packages installed on the system, just after --ignore
    elif [[ "${prev}" = --ignore ]]; then 
        COMPREPLY=( $(compgen -W "$(pacman -Qq)" -- "${cur}") )
    # complete with all locally installed packages, after -k --check -u --update
    elif searchfor "-k --check -u --update"; then
        COMPREPLY=( $(compgen -W "$(pacman -Qqm)" -- $cur) )
    # complete with all available aur packages, after -s --search  -i --info -d --download -m --makepkg -y --sync
    elif searchfor "-s --search  -i --info -d --download -m --makepkg -y --sync"; then 
        COMPREPLY=( $(compgen -W "$(cower -sq -- ^$cur 2>/dev/null)" -- $cur) )
        # anything shorter than 2 characters can't be autocompleted due to the AUR's search minimum
    fi

    # restore nullglob setting (copied from cower's autocomplete)
    [[ $ng ]] && shopt -u nullglob
}
complete -F _pacaur pacaur

# vim:set ts=4 sw=2 et: