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#!/bin/bash
# mkinitcpio bash completion by Seblu <seblu@seblu.net>

_lsinitcpio() {
    local action cur
    action="-a -h -n -v -x"
    _get_comp_words_by_ref cur
    case "$cur" in
        -*)    COMPREPLY=($(compgen -W "${action}" -- "$cur"));;
        *) _filedir;;
    esac
}

_find_kernel_versions() {
    local -a matches
    local regex

    # add completions from kernels in /boot
    regex="Linux kernel.*version"
    while IFS=':' read -r file metadata; do
        [[ $metadata =~ $regex ]] || continue
        matches+=("$file")
    done < <(file -e ascii /boot/*)

    # add completions based on kernel versions in /lib/modules
    for dir in /lib/modules/*/kernel; do
        dir=${dir%/kernel}
        matches+=("${dir#/lib/modules/}")
    done

    COMPREPLY=($(compgen -W "${matches[*]}" -- $cur))
}

_mkinitcpio() {
    local action cur prev opts
    opts=(-A --add -b --basedir -c --config -g --generate -H --hookhelp
          -h --help -k --kernel -L --listhooks -M --automods -n --nocolor
          -p --preset -S --skiphooks -s --save -t --builddir -v --verbose
          -z --compress)

    _get_comp_words_by_ref cur prev

    case $prev in
        -[cg]|--config|--generate)
            _filedir ;;
        -k|--kernel)
            _find_kernel_versions ;;
        -[bt]|--basedir|--builddir)
            _filedir -d ;;
        -p|--preset)
            COMPREPLY=($(cd /etc/mkinitcpio.d/ && compgen -X '!*.preset' -f  -- $cur))
            COMPREPLY=("${COMPREPLY[@]%.preset}") ;;
        -[AHS]|--add|--hookhelp|--skiphooks)
            COMPREPLY=($(cd /lib/initcpio/install/ && compgen -f -- $cur)
                       $(cd /usr/lib/initcpio/install/ && compgen -f -- $cur)) ;;
        *)
            COMPREPLY=($(compgen -W "${opts[*]}" -- "$cur")) ;;
    esac
}

complete -F _mkinitcpio mkinitcpio
complete -F _lsinitcpio lsinitcpio

# vim: set et ts=4 sw=4 ft=sh: