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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
	action="-A -b -c -g -H -h -k -L -M -n -p -S -s -v -z"
	_get_comp_words_by_ref cur prev
	case "$prev" in
		-c|-g) _filedir;;
		-k) _find_kernel_versions;;
		-b) _filedir -d;;
		-p) COMPREPLY=($(cd /etc/mkinitcpio.d/ && compgen -X '!*.preset' -f  -- $cur))
			COMPREPLY=("${COMPREPLY[@]%.preset}");;
		-A|-H|-S) COMPREPLY=($(cd /lib/initcpio/install/ && compgen -f -- $cur) \
		                     $(cd /usr/lib/initcpio/install/ && compgen -f -- $cur));;
		*) COMPREPLY=($(compgen -W "${action}" -- "$cur"));;
	esac
}

complete -F _mkinitcpio mkinitcpio
complete -F _lsinitcpio lsinitcpio

# vim: set ts=2 sw=2 ft=sh noet: