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#compdef lsinitcpio mkinitcpio

_detect_kver() {
    local __ kver_validator='^[[:digit:]]+(\.[[:digit:]]+)+'
    offset=$(hexdump -s 526 -n 2 -e '"%0d"' "$1" 2>/dev/null) || return 1
    read kver __ < \
        <(dd if="$1" bs=1 count=127 skip=$(( offset + 0x200 )) 2>/dev/null)
    [[ $kver =~ $kver_validator ]] && printf "$kver"
}

_find_kernel_versions() {
    local -a version
    local filedata

    for f in /boot/*; do
        # only match regular files which pass validation
        if [[ ! -L $f && -f $f ]] && kver=$(_detect_kver "$f"); then
            version+=("$kver" "$f")
        fi
    done

    compadd ${(u)version}
}

case $service in
    lsinitcpio)
        _arguments : \
            '(-a --analyze)'{-a,--analyze}'[analyze contents of image]' \
            '(-c --config)'{-c,--config}'[show configuration file image was built with]' \
            '(-l --list)'{-l,--list}'[list contents of the image (default)]' \
            '(-x --extract)'{-x,--extract}'[extract image to disk]' \
            '(-h --help)'{-h,--help}'[display this help]' \
            '(-n --nocolor)'{-n,--nocolor}'[disable colorized output]' \
            '(-V --version)'{-V,--version}'[display version information]' \
            '(-v --verbose)'{-v,--verbose}'[more verbose output]' \
            ':files:_files'
        ;;
    mkinitcpio)
        _arguments : \
            '(-A --addhooks)'{-A,--addhooks}'[Add specified hooks, comma separated, to image]::usr hooks:_path_files -W /usr/lib/initcpio/install::lib hooks:_path_files -W /lib/initcpio/install' \
            '(-c --config)'{-c,--config}'[Use alternate config file. (default: /etc/mkinitcpio.conf)]:config files:_files' \
            '(-g --generate)'{-g,--generate}'[Generate cpio image and write to specified path]:config files:_files' \
            '(-H --hookhelp)'{-H,--hookhelp}'[Display help for given hook and exit]::usr hooks:_path_files -W /usr/lib/initcpio/install::lib hooks:_path_files -W /lib/initcpio/install' \
            '(-h --help)'{-h,--help}'[Display this message and exit]' \
            '(-k --kernel)'{-k,--kernel}'[Use specified kernel version]:kernel versions:_find_kernel_versions' \
            '(-L --listhooks)'{-L,--listhooks}'[List all available hooks]' \
            '(-M --automods)'{-M,--automods}'[Display modules found via autodetection]' \
            '(-n --nocolor)'{-n,--nocolor}'[Disable colorized output messages]' \
            '(-p --preset)'{-p,--preset}'[Build specified preset from /etc/mkinitcpio.d]:presets:_files -g "*(\:r)" -W /etc/mkinitcpio.d' \
            '(-r --moduleroot)'{-r,--moduleroot}'[Root directory for modules (default: /)]:directories:_files -/' \
            '(-S --skiphooks)'{-S,--skiphooks}'[Skip specified hooks, comma-separated, during build]::usr hooks:_path_files -W /usr/lib/initcpio/install::lib hooks:_path_files -W /lib/initcpio/install' \
            '(-s --save)'{-s,--save}'[Save build directory. (default: no)]' \
            '(-t --builddir)'{-t,--builddir}'[Use DIR as the temporary build directory]:directories:_files -/' \
            '(-V --version)'{-V,--version}'[Display version information and exit]' \
            '(-v --verbose)'{-v,--verbose}'[Verbose output (default: no)]' \
            '(-z --compress)'{-z,--compress}'[Use an alternate compressor on the image]'
        ;;
    *)
        return 1;
        ;;
esac

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