moby/contrib/completion/bash/docker

#!/bin/bash
#
# bash completion file for core docker commands
#
# This script provides completion of:
#  - commands and their options
#  - container ids and names
#  - image repos and tags
#  - filepaths
#
# To enable the completions either:
#  - place this file in /etc/bash_completion.d
#  or
#  - copy this file to e.g. ~/.docker-completion.sh and add the line
#    below to your .bashrc after bash completion features are loaded
#    . ~/.docker-completion.sh
#
# Configuration:
#
# For several commands, the amount of completions can be configured by
# setting environment variables.
#
# DOCKER_COMPLETION_SHOW_CONTAINER_IDS
# DOCKER_COMPLETION_SHOW_NETWORK_IDS
# DOCKER_COMPLETION_SHOW_NODE_IDS
# DOCKER_COMPLETION_SHOW_SERVICE_IDS
#   "no"  - Show names only (default)
#   "yes" - Show names and ids
#
# You can tailor completion for the "events", "history", "inspect", "run",
# "rmi" and "save" commands by settings the following environment
# variables:
#
# DOCKER_COMPLETION_SHOW_IMAGE_IDS
#   "none" - Show names only (default)
#   "non-intermediate" - Show names and ids, but omit intermediate image IDs
#   "all" - Show names and ids, including intermediate image IDs
#
# DOCKER_COMPLETION_SHOW_TAGS
#   "yes" - include tags in completion options (default)
#   "no"  - don't include tags in completion options

#
# Note:
# Currently, the completions will not work if the docker daemon is not
# bound to the default communication port/socket
# If the docker daemon is using a unix socket for communication your user
# must have access to the socket for the completions to function correctly
#
# Note for developers:
# Please arrange options sorted alphabetically by long name with the short
# options immediately following their corresponding long form.
# This order should be applied to lists, alternatives and code blocks.

__docker_previous_extglob_setting=$(shopt -p extglob)
shopt -s extglob

__docker_q() {
	docker ${host:+-H "$host"} ${config:+--config "$config"} 2>/dev/null "$@"
}

# __docker_containers returns a list of containers. Additional options to
# `docker ps` may be specified in order to filter the list, e.g.
# `__docker_containers --filter status=running`
# By default, only names are returned.
# Set DOCKER_COMPLETION_SHOW_CONTAINER_IDS=yes to also complete IDs.
# An optional first option `--id|--name` may be used to limit the
# output to the IDs or names of matching items. This setting takes
# precedence over the environment setting.
__docker_containers() {
	local format
	if [ "$1" = "--id" ] ; then
		format='{{.ID}}'
		shift
	elif [ "$1" = "--name" ] ; then
		format='{{.Names}}'
		shift
	elif [ "${DOCKER_COMPLETION_SHOW_CONTAINER_IDS}" = yes ] ; then
		format='{{.ID}} {{.Names}}'
	else
		format='{{.Names}}'
	fi
	__docker_q ps --format "$format" "$@"
}

# __docker_complete_containers applies completion of containers based on the current
# value of `$cur` or the value of the optional first option `--cur`, if given.
# Additional filters may be appended, see `__docker_containers`.
__docker_complete_containers() {
	local current="$cur"
	if [ "$1" = "--cur" ] ; then
		current="$2"
		shift 2
	fi
	COMPREPLY=( $(compgen -W "$(__docker_containers "$@")" -- "$current") )
}

__docker_complete_containers_all() {
	__docker_complete_containers "$@" --all
}

__docker_complete_containers_running() {
	__docker_complete_containers "$@" --filter status=running
}

__docker_complete_containers_stopped() {
	__docker_complete_containers "$@" --filter status=exited
}

__docker_complete_containers_unpauseable() {
	__docker_complete_containers "$@" --filter status=paused
}

__docker_complete_container_names() {
	local containers=( $(__docker_q ps -aq --no-trunc) )
	local names=( $(__docker_q inspect --format '{{.Name}}' "${containers[@]}") )
	names=( "${names[@]#/}" ) # trim off the leading "/" from the container names
	COMPREPLY=( $(compgen -W "${names[*]}" -- "$cur") )
}

__docker_complete_container_ids() {
	local containers=( $(__docker_q ps -aq) )
	COMPREPLY=( $(compgen -W "${containers[*]}" -- "$cur") )
}

__docker_complete_images() {
	local images_args=""

	case "$DOCKER_COMPLETION_SHOW_IMAGE_IDS" in
		all)
			images_args="--no-trunc -a"
			;;
		non-intermediate)
			images_args="--no-trunc"
			;;
	esac

	local repo_print_command
	if [ "${DOCKER_COMPLETION_SHOW_TAGS:-yes}" = "yes" ]; then
		repo_print_command='print $1; print $1":"$2'
	else
		repo_print_command='print $1'
	fi

	local awk_script
	case "$DOCKER_COMPLETION_SHOW_IMAGE_IDS" in
		all|non-intermediate)
			awk_script='NR>1 { print $3; if ($1 != "<none>") { '"$repo_print_command"' } }'
			;;
		none|*)
			awk_script='NR>1 && $1 != "<none>" { '"$repo_print_command"' }'
			;;
	esac

	local images=$(__docker_q images $images_args | awk "$awk_script")
	COMPREPLY=( $(compgen -W "$images" -- "$cur") )
	__ltrim_colon_completions "$cur"
}

__docker_complete_image_repos() {
	local repos="$(__docker_q images | awk 'NR>1 && $1 != "<none>" { print $1 }')"
	COMPREPLY=( $(compgen -W "$repos" -- "$cur") )
}

__docker_complete_image_repos_and_tags() {
	local reposAndTags="$(__docker_q images | awk 'NR>1 && $1 != "<none>" { print $1; print $1":"$2 }')"
	COMPREPLY=( $(compgen -W "$reposAndTags" -- "$cur") )
	__ltrim_colon_completions "$cur"
}

__docker_complete_containers_and_images() {
	__docker_complete_containers_all
	local containers=( "${COMPREPLY[@]}" )
	__docker_complete_images
	COMPREPLY+=( "${containers[@]}" )
}

# __docker_networks returns a list of all networks. Additional options to
# `docker network ls` may be specified in order to filter the list, e.g.
# `__docker_networks --filter type=custom`
# By default, only names are returned.
# Set DOCKER_COMPLETION_SHOW_NETWORK_IDS=yes to also complete IDs.
# An optional first option `--id|--name` may be used to limit the
# output to the IDs or names of matching items. This setting takes
# precedence over the environment setting.
__docker_networks() {
	local format
	if [ "$1" = "--id" ] ; then
		format='{{.ID}}'
		shift
	elif [ "$1" = "--name" ] ; then
		format='{{.Name}}'
		shift
	elif [ "${DOCKER_COMPLETION_SHOW_NETWORK_IDS}" = yes ] ; then
		format='{{.ID}} {{.Name}}'
	else
		format='{{.Name}}'
	fi
	__docker_q network ls --format "$format" "$@"
}

# __docker_complete_networks applies completion of networks based on the current
# value of `$cur` or the value of the optional first option `--cur`, if given.
# Additional filters may be appended, see `__docker_networks`.
__docker_complete_networks() {
	local current="$cur"
	if [ "$1" = "--cur" ] ; then
		current="$2"
		shift 2
	fi
	COMPREPLY=( $(compgen -W "$(__docker_networks "$@")" -- "$current") )
}

__docker_complete_containers_in_network() {
	local containers=$(__docker_q network inspect -f '{{range $i, $c := .Containers}}{{$i}} {{$c.Name}} {{end}}' "$1")
	COMPREPLY=( $(compgen -W "$containers" -- "$cur") )
}

# __docker_volumes returns a list of all volumes. Additional options to
# `docker volume ls` may be specified in order to filter the list, e.g.
# `__docker_volumes --filter dangling=true`
# Because volumes do not have IDs, this function does not distinguish between
# IDs and names.
__docker_volumes() {
	__docker_q volume ls -q "$@"
}

# __docker_complete_volumes applies completion of volumes based on the current
# value of `$cur` or the value of the optional first option `--cur`, if given.
# Additional filters may be appended, see `__docker_volumes`.
__docker_complete_volumes() {
	local current="$cur"
	if [ "$1" = "--cur" ] ; then
		current="$2"
		shift 2
	fi
	COMPREPLY=( $(compgen -W "$(__docker_volumes "$@")" -- "$current") )
}

# __docker_plugins returns a list of all plugins of a given type.
# The type has to be specified with the mandatory option `--type`.
# Valid types are: Network, Volume, Authorization.
# Completions may be added or removed with `--add` and `--remove`
__docker_plugins() {
	local type add=() remove=()
	while true ; do
		case "$1" in
			--type)
				type="$2"
				shift 2
				;;
			--add)
				add+=("$2")
				shift 2
				;;
			--remove)
				remove+=("$2")
				shift 2
				;;
			*)
				break
				;;
		esac
	done

	local plugins=($(__docker_q info | sed -n "/^Plugins/,/^[^ ]/s/ $type: //p"))
	for del in "${remove[@]}" ; do
		plugins=(${plugins[@]/$del/})
	done
	echo "${plugins[@]} ${add[@]}"
}

# __docker_complete_plugins applies completion of plugins based on the current
# value of `$cur` or the value of the optional first option `--cur`, if given.
# The plugin type has to be specified with the next option `--type`.
__docker_complete_plugins() {
	local current="$cur"
	if [ "$1" = "--cur" ] ; then
		current="$2"
		shift 2
	fi
	COMPREPLY=( $(compgen -W "$(__docker_plugins "$@")" -- "$current") )
}

__docker_runtimes() {
	__docker_q info | sed -n 's/^Runtimes: \(.*\)/\1/p'
}

__docker_complete_runtimes() {
	COMPREPLY=( $(compgen -W "$(__docker_runtimes)" -- "$cur") )
}

# __docker_nodes returns a list of all nodes. Additional options to
# `docker node ls` may be specified in order to filter the list, e.g.
# `__docker_nodes --filter role=manager`
# By default, only node names are returned.
# Set DOCKER_COMPLETION_SHOW_NODE_IDS=yes to also complete node IDs.
# An optional first option `--id|--name` may be used to limit the
# output to the IDs or names of matching items. This setting takes
# precedence over the environment setting.
__docker_nodes() {
	local fields='$2'  # default: node name only
	[ "${DOCKER_COMPLETION_SHOW_NODE_IDS}" = yes ] && fields='$1,$2' # ID and name

	if [ "$1" = "--id" ] ; then
		fields='$1' # IDs only
		shift
	elif [ "$1" = "--name" ] ; then
		fields='$2' # names only
		shift
	fi
	__docker_q node ls "$@" | tr -d '*' | awk "NR>1 {print $fields}"
}

# __docker_complete_nodes applies completion of nodes based on the current
# value of `$cur` or the value of the optional first option `--cur`, if given.
# Additional filters may be appended, see `__docker_nodes`.
__docker_complete_nodes() {
	local current="$cur"
	if [ "$1" = "--cur" ] ; then
		current="$2"
		shift 2
	fi
	COMPREPLY=( $(compgen -W "$(__docker_nodes "$@")" -- "$current") )
}

__docker_complete_nodes_plus_self() {
	__docker_complete_nodes "$@"
	COMPREPLY+=( self )
}

# __docker_services returns a list of all services. Additional options to
# `docker service ls` may be specified in order to filter the list, e.g.
# `__docker_services --filter name=xxx`
# By default, only node names are returned.
# Set DOCKER_COMPLETION_SHOW_SERVICE_IDS=yes to also complete IDs.
# An optional first option `--id|--name` may be used to limit the
# output to the IDs or names of matching items. This setting takes
# precedence over the environment setting.
__docker_services() {
	local fields='$2'  # default: service name only
	[ "${DOCKER_COMPLETION_SHOW_SERVICE_IDS}" = yes ] && fields='$1,$2' # ID & name

	if [ "$1" = "--id" ] ; then
		fields='$1' # IDs only
		shift
	elif [ "$1" = "--name" ] ; then
		fields='$2' # names only
		shift
	fi
        __docker_q service ls "$@" | awk "NR>1 {print $fields}"
}

# __docker_complete_services applies completion of services based on the current
# value of `$cur` or the value of the optional first option `--cur`, if given.
# Additional filters may be appended, see `__docker_services`.
__docker_complete_services() {
	local current="$cur"
	if [ "$1" = "--cur" ] ; then
		current="$2"
		shift 2
	fi
	COMPREPLY=( $(compgen -W "$(__docker_services "$@")" -- "$current") )
}

# __docker_append_to_completions appends the word passed as an argument to every
# word in `$COMPREPLY`.
# Normally you do this with `compgen -S` while generating the completions.
# This function allows you to append a suffix later. It allows you to use
# the __docker_complete_XXX functions in cases where you need a suffix.
__docker_append_to_completions() {
	COMPREPLY=( ${COMPREPLY[@]/%/"$1"} )
}

# __docker_pos_first_nonflag finds the position of the first word that is neither
# option nor an option's argument. If there are options that require arguments,
# you should pass a glob describing those options, e.g. "--option1|-o|--option2"
# Use this function to restrict completions to exact positions after the argument list.
__docker_pos_first_nonflag() {
	local argument_flags=$1

	local counter=$((${subcommand_pos:-${command_pos}} + 1))
	while [ $counter -le $cword ]; do
		if [ -n "$argument_flags" ] && eval "case '${words[$counter]}' in $argument_flags) true ;; *) false ;; esac"; then
			(( counter++ ))
			# eat "=" in case of --option=arg syntax
			[ "${words[$counter]}" = "=" ] && (( counter++ ))
		else
			case "${words[$counter]}" in
				-*)
					;;
				*)
					break
					;;
			esac
		fi

		# Bash splits words at "=", retaining "=" as a word, examples:
		# "--debug=false" => 3 words, "--log-opt syslog-facility=daemon" => 4 words
		while [ "${words[$counter + 1]}" = "=" ] ; do
			counter=$(( counter + 2))
		done

		(( counter++ ))
	done

	echo $counter
}

# __docker_map_key_of_current_option returns `key` if we are currently completing the
# value of a map option (`key=value`) which matches the extglob given as an argument.
# This function is needed for key-specific completions.
__docker_map_key_of_current_option() {
	local glob="$1"

	local key glob_pos
	if [ "$cur" = "=" ] ; then        # key= case
		key="$prev"
		glob_pos=$((cword - 2))
	elif [[ $cur == *=* ]] ; then     # key=value case (OSX)
		key=${cur%=*}
		glob_pos=$((cword - 1))
	elif [ "$prev" = "=" ] ; then
		key=${words[$cword - 2]}  # key=value case
		glob_pos=$((cword - 3))
	else
		return
	fi

	[ "${words[$glob_pos]}" = "=" ] && ((glob_pos--))  # --option=key=value syntax

	[[ ${words[$glob_pos]} == @($glob) ]] && echo "$key"
}

# __docker_value_of_option returns the value of the first option matching `option_glob`.
# Valid values for `option_glob` are option names like `--log-level` and globs like
# `--log-level|-l`
# Only positions between the command and the current word are considered.
__docker_value_of_option() {
	local option_extglob=$(__docker_to_extglob "$1")

	local counter=$((command_pos + 1))
	while [ $counter -lt $cword ]; do
		case ${words[$counter]} in
			$option_extglob )
				echo ${words[$counter + 1]}
				break
				;;
		esac
		(( counter++ ))
	done
}

# __docker_to_alternatives transforms a multiline list of strings into a single line
# string with the words separated by `|`.
# This is used to prepare arguments to __docker_pos_first_nonflag().
__docker_to_alternatives() {
	local parts=( $1 )
	local IFS='|'
	echo "${parts[*]}"
}

# __docker_to_extglob transforms a multiline list of options into an extglob pattern
# suitable for use in case statements.
__docker_to_extglob() {
	local extglob=$( __docker_to_alternatives "$1" )
	echo "@($extglob)"
}

# __docker_subcommands processes subcommands
# Locates the first occurrence of any of the subcommands contained in the
# first argument. In case of a match, calls the corresponding completion
# function and returns 0.
# If no match is found, 1 is returned. The calling function can then
# continue processing its completion.
#
# TODO if the preceding command has options that accept arguments and an
# argument is equal ot one of the subcommands, this is falsely detected as
# a match.
__docker_subcommands() {
	local subcommands="$1"

	local counter=$(($command_pos + 1))
	while [ $counter -lt $cword ]; do
		case "${words[$counter]}" in
			$(__docker_to_extglob "$subcommands") )
				subcommand_pos=$counter
				local subcommand=${words[$counter]}
				local completions_func=_docker_${command}_${subcommand}
				declare -F $completions_func >/dev/null && $completions_func
				return 0
				;;
		esac
		(( counter++ ))
	done
	return 1
}

# __docker_nospace suppresses trailing whitespace
__docker_nospace() {
	# compopt is not available in ancient bash versions
	type compopt &>/dev/null && compopt -o nospace
}

__docker_complete_resolved_hostname() {
	command -v host >/dev/null 2>&1 || return
	COMPREPLY=( $(host 2>/dev/null "${cur%:}" | awk '/has address/ {print $4}') )
}

__docker_local_interfaces() {
	command -v ip >/dev/null 2>&1 || return
	ip addr show scope global 2>/dev/null | sed -n 's| \+inet \([0-9.]\+\).* \([^ ]\+\)|\1 \2|p'
}

__docker_complete_local_interfaces() {
	local additional_interface
	if [ "$1" = "--add" ] ; then
		additional_interface="$2"
	fi

	COMPREPLY=( $( compgen -W "$(__docker_local_interfaces) $additional_interface" -- "$cur" ) )
}

__docker_complete_capabilities() {
	# The list of capabilities is defined in types.go, ALL was added manually.
	COMPREPLY=( $( compgen -W "
		ALL
		AUDIT_CONTROL
		AUDIT_WRITE
		AUDIT_READ
		BLOCK_SUSPEND
		CHOWN
		DAC_OVERRIDE
		DAC_READ_SEARCH
		FOWNER
		FSETID
		IPC_LOCK
		IPC_OWNER
		KILL
		LEASE
		LINUX_IMMUTABLE
		MAC_ADMIN
		MAC_OVERRIDE
		MKNOD
		NET_ADMIN
		NET_BIND_SERVICE
		NET_BROADCAST
		NET_RAW
		SETFCAP
		SETGID
		SETPCAP
		SETUID
		SYS_ADMIN
		SYS_BOOT
		SYS_CHROOT
		SYSLOG
		SYS_MODULE
		SYS_NICE
		SYS_PACCT
		SYS_PTRACE
		SYS_RAWIO
		SYS_RESOURCE
		SYS_TIME
		SYS_TTY_CONFIG
		WAKE_ALARM
	" -- "$cur" ) )
}

__docker_complete_detach-keys() {
	case "$prev" in
		--detach-keys)
			case "$cur" in
				*,)
					COMPREPLY=( $( compgen -W "${cur}ctrl-" -- "$cur" ) )
					;;
				*)
					COMPREPLY=( $( compgen -W "ctrl-" -- "$cur" ) )
					;;
			esac

			__docker_nospace
			return
			;;
	esac
	return 1
}

__docker_complete_isolation() {
	COMPREPLY=( $( compgen -W "default hyperv process" -- "$cur" ) )
}

__docker_complete_log_drivers() {
	COMPREPLY=( $( compgen -W "
		awslogs
		etwlogs
		fluentd
		gcplogs
		gelf
		journald
		json-file
		logentries
		none
		splunk
		syslog
	" -- "$cur" ) )
}

__docker_complete_log_options() {
	# see docs/reference/logging/index.md
	local awslogs_options="awslogs-region awslogs-group awslogs-stream"
	local fluentd_options="env fluentd-address fluentd-async-connect fluentd-buffer-limit fluentd-retry-wait fluentd-max-retries labels tag"
	local gcplogs_options="env gcp-log-cmd gcp-project labels"
	local gelf_options="env gelf-address gelf-compression-level gelf-compression-type labels tag"
	local journald_options="env labels tag"
	local json_file_options="env labels max-file max-size"
	local logentries_options="logentries-token"
	local syslog_options="env labels syslog-address syslog-facility syslog-format syslog-tls-ca-cert syslog-tls-cert syslog-tls-key syslog-tls-skip-verify tag"
	local splunk_options="env labels splunk-caname splunk-capath splunk-format splunk-gzip splunk-gzip-level splunk-index splunk-insecureskipverify splunk-source splunk-sourcetype splunk-token splunk-url splunk-verify-connection tag"

	local all_options="$fluentd_options $gcplogs_options $gelf_options $journald_options $logentries_options $json_file_options $syslog_options $splunk_options"

	case $(__docker_value_of_option --log-driver) in
		'')
			COMPREPLY=( $( compgen -W "$all_options" -S = -- "$cur" ) )
			;;
		awslogs)
			COMPREPLY=( $( compgen -W "$awslogs_options" -S = -- "$cur" ) )
			;;
		fluentd)
			COMPREPLY=( $( compgen -W "$fluentd_options" -S = -- "$cur" ) )
			;;
		gcplogs)
			COMPREPLY=( $( compgen -W "$gcplogs_options" -S = -- "$cur" ) )
			;;
		gelf)
			COMPREPLY=( $( compgen -W "$gelf_options" -S = -- "$cur" ) )
			;;
		journald)
			COMPREPLY=( $( compgen -W "$journald_options" -S = -- "$cur" ) )
			;;
		json-file)
			COMPREPLY=( $( compgen -W "$json_file_options" -S = -- "$cur" ) )
			;;
		logentries)
			COMPREPLY=( $( compgen -W "$logentries_options" -S = -- "$cur" ) )
			;;
		syslog)
			COMPREPLY=( $( compgen -W "$syslog_options" -S = -- "$cur" ) )
			;;
		splunk)
			COMPREPLY=( $( compgen -W "$splunk_options" -S = -- "$cur" ) )
			;;
		*)
			return
			;;
	esac

	__docker_nospace
}

__docker_complete_log_driver_options() {
	local key=$(__docker_map_key_of_current_option '--log-opt')
	case "$key" in
		fluentd-async-connect)
			COMPREPLY=( $( compgen -W "false true" -- "${cur##*=}" ) )
			return
			;;
		gelf-address)
			COMPREPLY=( $( compgen -W "udp" -S "://" -- "${cur##*=}" ) )
			__docker_nospace
			return
			;;
		gelf-compression-level)
			COMPREPLY=( $( compgen -W "1 2 3 4 5 6 7 8 9" -- "${cur##*=}" ) )
			return
			;;
		gelf-compression-type)
			COMPREPLY=( $( compgen -W "gzip none zlib" -- "${cur##*=}" ) )
			return
			;;
		syslog-address)
			COMPREPLY=( $( compgen -W "tcp:// tcp+tls:// udp:// unix://" -- "${cur##*=}" ) )
			__docker_nospace
			__ltrim_colon_completions "${cur}"
			return
			;;
		syslog-facility)
			COMPREPLY=( $( compgen -W "
				auth
				authpriv
				cron
				daemon
				ftp
				kern
				local0
				local1
				local2
				local3
				local4
				local5
				local6
				local7
				lpr
				mail
				news
				syslog
				user
				uucp
			" -- "${cur##*=}" ) )
			return
			;;
		syslog-format)
			COMPREPLY=( $( compgen -W "rfc3164 rfc5424 rfc5424micro" -- "${cur##*=}" ) )
			return
			;;
		syslog-tls-ca-cert|syslog-tls-cert|syslog-tls-key)
			_filedir
			return
			;;
		syslog-tls-skip-verify)
			COMPREPLY=( $( compgen -W "true" -- "${cur##*=}" ) )
			return
			;;
		splunk-url)
			COMPREPLY=( $( compgen -W "http:// https://" -- "${cur##*=}" ) )
			__docker_nospace
			__ltrim_colon_completions "${cur}"
			return
			;;
		splunk-gzip|splunk-insecureskipverify|splunk-verify-connection)
			COMPREPLY=( $( compgen -W "false true" -- "${cur##*=}" ) )
			return
			;;
		splunk-format)
			COMPREPLY=( $( compgen -W "inline json raw" -- "${cur##*=}" ) )
			return
			;;
	esac
	return 1
}

__docker_complete_log_levels() {
	COMPREPLY=( $( compgen -W "debug info warn error fatal" -- "$cur" ) )
}

__docker_complete_restart() {
	case "$prev" in
		--restart)
			case "$cur" in
				on-failure:*)
					;;
				*)
					COMPREPLY=( $( compgen -W "always no on-failure on-failure: unless-stopped" -- "$cur") )
					;;
			esac
			return
			;;
	esac
	return 1
}

# __docker_complete_signals returns a subset of the available signals that is most likely
# relevant in the context of docker containers
__docker_complete_signals() {
	local signals=(
		SIGCONT
		SIGHUP
		SIGINT
		SIGKILL
		SIGQUIT
		SIGSTOP
		SIGTERM
		SIGUSR1
		SIGUSR2
	)
	COMPREPLY=( $( compgen -W "${signals[*]} ${signals[*]#SIG}" -- "$( echo $cur | tr '[:lower:]' '[:upper:]')" ) )
}

__docker_complete_user_group() {
	if [[ $cur == *:* ]] ; then
		COMPREPLY=( $(compgen -g -- "${cur#*:}") )
	else
		COMPREPLY=( $(compgen -u -S : -- "$cur") )
		__docker_nospace
	fi
}

_docker_docker() {
	# global options that may appear after the docker command
	local boolean_options="
		$global_boolean_options
		--help
		--version -v
	"

	case "$prev" in
		--config)
			_filedir -d
			return
			;;
		--log-level|-l)
			__docker_complete_log_levels
			return
			;;
		$(__docker_to_extglob "$global_options_with_args") )
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "$boolean_options $global_options_with_args" -- "$cur" ) )
			;;
		*)
			local counter=$( __docker_pos_first_nonflag "$(__docker_to_extglob "$global_options_with_args")" )
			if [ $cword -eq $counter ]; then
				COMPREPLY=( $( compgen -W "${commands[*]} help" -- "$cur" ) )
			fi
			;;
	esac
}

_docker_attach() {
	__docker_complete_detach-keys && return

 	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--detach-keys --help --no-stdin --sig-proxy=false" -- "$cur" ) )
			;;
		*)
			local counter=$(__docker_pos_first_nonflag '--detach-keys')
			if [ $cword -eq $counter ]; then
				__docker_complete_containers_running
			fi
			;;
	esac
}

_docker_build() {
	local options_with_args="
		--build-arg
		--cgroup-parent
		--cpuset-cpus
		--cpuset-mems
		--cpu-shares -c
		--cpu-period
		--cpu-quota
		--file -f
		--isolation
		--label
		--memory -m
		--memory-swap
		--shm-size
		--tag -t
		--ulimit
	"

	local boolean_options="
		--compress
		--disable-content-trust=false
		--force-rm
		--help
		--no-cache
		--pull
		--quiet -q
		--rm
	"

	local all_options="$options_with_args $boolean_options"

	case "$prev" in
		--build-arg)
			COMPREPLY=( $( compgen -e -- "$cur" ) )
			__docker_nospace
			return
			;;
		--file|-f)
			_filedir
			return
			;;
		--isolation)
			__docker_complete_isolation
			return
			;;
		--tag|-t)
			__docker_complete_image_repos_and_tags
			return
			;;
		$(__docker_to_extglob "$options_with_args") )
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "$all_options" -- "$cur" ) )
			;;
		*)
			local counter=$( __docker_pos_first_nonflag $( __docker_to_alternatives "$options_with_args" ) )
			if [ $cword -eq $counter ]; then
				_filedir -d
			fi
			;;
	esac
}

_docker_commit() {
	case "$prev" in
		--author|-a|--change|-c|--message|-m)
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--author -a --change -c --help --message -m --pause=false -p=false" -- "$cur" ) )
			;;
		*)
			local counter=$(__docker_pos_first_nonflag '--author|-a|--change|-c|--message|-m')

			if [ $cword -eq $counter ]; then
				__docker_complete_containers_all
				return
			fi
			(( counter++ ))

			if [ $cword -eq $counter ]; then
				__docker_complete_image_repos_and_tags
				return
			fi
			;;
	esac
}

_docker_cp() {
	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--follow-link -L --help" -- "$cur" ) )
			;;
		*)
			local counter=$(__docker_pos_first_nonflag)
			if [ $cword -eq $counter ]; then
				case "$cur" in
					*:)
						return
						;;
					*)
						# combined container and filename completion
						_filedir
						local files=( ${COMPREPLY[@]} )

						__docker_complete_containers_all
						COMPREPLY=( $( compgen -W "${COMPREPLY[*]}" -S ':' ) )
						local containers=( ${COMPREPLY[@]} )

						COMPREPLY=( $( compgen -W "${files[*]} ${containers[*]}" -- "$cur" ) )
						if [[ "$COMPREPLY" == *: ]]; then
							__docker_nospace
						fi
						return
						;;
				esac
			fi
			(( counter++ ))

			if [ $cword -eq $counter ]; then
				if [ -e "$prev" ]; then
					__docker_complete_containers_all
					COMPREPLY=( $( compgen -W "${COMPREPLY[*]}" -S ':' ) )
					__docker_nospace
				else
					_filedir
				fi
				return
			fi
			;;
	esac
}

_docker_create() {
	_docker_run
}

_docker_daemon() {
	local boolean_options="
		$global_boolean_options
		--disable-legacy-registry
		--help
		--icc=false
		--ip-forward=false
		--ip-masq=false
		--iptables=false
		--ipv6
		--live-restore
		--raw-logs
		--selinux-enabled
		--userland-proxy=false
	"
	local options_with_args="
		$global_options_with_args
		--add-runtime
		--api-cors-header
		--authorization-plugin
		--bip
		--bridge -b
		--cgroup-parent
		--cluster-advertise
		--cluster-store
		--cluster-store-opt
		--config-file
		--containerd
		--default-gateway
		--default-gateway-v6
		--default-ulimit
		--dns
		--dns-search
		--dns-opt
		--exec-opt
		--exec-root
		--fixed-cidr
		--fixed-cidr-v6
		--graph -g
		--group -G
		--init-path
		--insecure-registry
		--ip
		--label
		--log-driver
		--log-opt
		--max-concurrent-downloads
		--max-concurrent-uploads
		--mtu
		--oom-score-adjust
		--pidfile -p
		--registry-mirror
		--storage-driver -s
		--storage-opt
		--userns-remap
	"

	__docker_complete_log_driver_options && return

 	key=$(__docker_map_key_of_current_option '--cluster-store-opt')
 	case "$key" in
 		kv.*file)
			cur=${cur##*=}
 			_filedir
 			return
 			;;
 	esac

 	local key=$(__docker_map_key_of_current_option '--storage-opt')
 	case "$key" in
 		dm.blkdiscard|dm.override_udev_sync_check|dm.use_deferred_removal|dm.use_deferred_deletion)
 			COMPREPLY=( $( compgen -W "false true" -- "${cur##*=}" ) )
 			return
 			;;
 		dm.fs)
 			COMPREPLY=( $( compgen -W "ext4 xfs" -- "${cur##*=}" ) )
 			return
 			;;
 		dm.thinpooldev)
			cur=${cur##*=}
 			_filedir
 			return
 			;;
 	esac

	case "$prev" in
		--authorization-plugin)
			__docker_complete_plugins --type Authorization
			return
			;;
		--cluster-store)
			COMPREPLY=( $( compgen -W "consul etcd zk" -S "://" -- "$cur" ) )
			__docker_nospace
			return
			;;
		--cluster-store-opt)
			COMPREPLY=( $( compgen -W "discovery.heartbeat discovery.ttl kv.cacertfile kv.certfile kv.keyfile kv.path" -S = -- "$cur" ) )
			__docker_nospace
			return
			;;
		--config-file|--containerd|--init-path|--pidfile|-p|--tlscacert|--tlscert|--tlskey)
			_filedir
			return
			;;
		--exec-root|--graph|-g)
			_filedir -d
			return
			;;
		--log-driver)
			__docker_complete_log_drivers
			return
			;;
		--storage-driver|-s)
			COMPREPLY=( $( compgen -W "aufs btrfs devicemapper overlay  overlay2 vfs zfs" -- "$(echo $cur | tr '[:upper:]' '[:lower:]')" ) )
			return
			;;
		--storage-opt)
			local btrfs_options="btrfs.min_space"
			local devicemapper_options="
				dm.basesize
				dm.blkdiscard
				dm.blocksize
				dm.fs
				dm.loopdatasize
				dm.loopmetadatasize
				dm.min_free_space
				dm.mkfsarg
				dm.mountopt
				dm.override_udev_sync_check
				dm.thinpooldev
				dm.use_deferred_deletion
				dm.use_deferred_removal
			"
			local zfs_options="zfs.fsname"

			case $(__docker_value_of_option '--storage-driver|-s') in
				'')
					COMPREPLY=( $( compgen -W "$btrfs_options $devicemapper_options $zfs_options" -S = -- "$cur" ) )
					;;
				btrfs)
					COMPREPLY=( $( compgen -W "$btrfs_options" -S = -- "$cur" ) )
					;;
				devicemapper)
					COMPREPLY=( $( compgen -W "$devicemapper_options" -S = -- "$cur" ) )
					;;
				zfs)
					COMPREPLY=( $( compgen -W "$zfs_options" -S = -- "$cur" ) )
					;;
				*)
					return
					;;
			esac
			__docker_nospace
			return
			;;
		--log-level|-l)
			__docker_complete_log_levels
			return
			;;
		--log-opt)
			__docker_complete_log_options
			return
			;;
		--userns-remap)
			__docker_complete_user_group
			return
			;;
		$(__docker_to_extglob "$options_with_args") )
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "$boolean_options $options_with_args" -- "$cur" ) )
			;;
	esac
}

_docker_diff() {
	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--help" -- "$cur" ) )
			;;
		*)
			local counter=$(__docker_pos_first_nonflag)
			if [ $cword -eq $counter ]; then
				__docker_complete_containers_all
			fi
			;;
	esac
}

_docker_events() {
	local key=$(__docker_map_key_of_current_option '-f|--filter')
	case "$key" in
		container)
			__docker_complete_containers_all --cur "${cur##*=}"
			return
			;;
		daemon)
			local name=$(__docker_q info | sed -n 's/^\(ID\|Name\): //p')
			COMPREPLY=( $( compgen -W "$name" -- "${cur##*=}" ) )
			return
			;;
		event)
			COMPREPLY=( $( compgen -W "
				attach
				commit
				connect
				copy
				create
				delete
				destroy
				detach
				die
				disconnect
				exec_create
				exec_detach
				exec_start
				export
				health_status
				import
				kill
				load
				mount
				oom
				pause
				pull
				push
				reload
				rename
				resize
				restart
				save
				start
				stop
				tag
				top
				unmount
				unpause
				untag
				update
			" -- "${cur##*=}" ) )
			return
			;;
		image)
			cur="${cur##*=}"
			__docker_complete_images
			return
			;;
		network)
			__docker_complete_networks --cur "${cur##*=}"
			return
			;;
		type)
			COMPREPLY=( $( compgen -W "container daemon image network volume" -- "${cur##*=}" ) )
			return
			;;
		volume)
			__docker_complete_volumes --cur "${cur##*=}"
			return
			;;
	esac

	case "$prev" in
		--filter|-f)
			COMPREPLY=( $( compgen -S = -W "container daemon event image label network type volume" -- "$cur" ) )
			__docker_nospace
			return
			;;
		--since|--until)
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--filter -f --help --since --until --format" -- "$cur" ) )
			;;
	esac
}

_docker_exec() {
	__docker_complete_detach-keys && return

	case "$prev" in
		--user|-u)
			__docker_complete_user_group
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--detach -d --detach-keys --help --interactive -i --privileged -t --tty -u --user" -- "$cur" ) )
			;;
		*)
			__docker_complete_containers_running
			;;
	esac
}

_docker_export() {
	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--help" -- "$cur" ) )
			;;
		*)
			local counter=$(__docker_pos_first_nonflag)
			if [ $cword -eq $counter ]; then
				__docker_complete_containers_all
			fi
			;;
	esac
}

_docker_help() {
	local counter=$(__docker_pos_first_nonflag)
	if [ $cword -eq $counter ]; then
		COMPREPLY=( $( compgen -W "${commands[*]}" -- "$cur" ) )
	fi
}

_docker_history() {
	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--help --human=false -H=false --no-trunc --quiet -q" -- "$cur" ) )
			;;
		*)
			local counter=$(__docker_pos_first_nonflag)
			if [ $cword -eq $counter ]; then
				__docker_complete_images
			fi
			;;
	esac
}

_docker_images() {
	local key=$(__docker_map_key_of_current_option '--filter|-f')
	case "$key" in
		before)
			cur="${cur##*=}"
			__docker_complete_images
			return
			;;
		dangling)
			COMPREPLY=( $( compgen -W "false true" -- "${cur##*=}" ) )
			return
			;;
		label)
			return
			;;
		since)
			cur="${cur##*=}"
			__docker_complete_images
			return
			;;
	esac

	case "$prev" in
		--filter|-f)
			COMPREPLY=( $( compgen -S = -W "before dangling label since" -- "$cur" ) )
			__docker_nospace
			return
			;;
                --format)
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--all -a --digests --filter -f --format --help --no-trunc --quiet -q" -- "$cur" ) )
			;;
		=)
			return
			;;
		*)
			__docker_complete_image_repos
			;;
	esac
}

_docker_import() {
	case "$prev" in
		--change|-c|--message|-m)
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--change -c --help --message -m" -- "$cur" ) )
			;;
		*)
			local counter=$(__docker_pos_first_nonflag '--change|-c|--message|-m')
			if [ $cword -eq $counter ]; then
				return
			fi
			(( counter++ ))

			if [ $cword -eq $counter ]; then
				__docker_complete_image_repos_and_tags
				return
			fi
			;;
	esac
}

_docker_info() {
	case "$prev" in
		--format|-f)
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--format -f --help" -- "$cur" ) )
			;;
	esac
}

_docker_inspect() {
	case "$prev" in
		--format|-f)
			return
			;;
		--type)
                     COMPREPLY=( $( compgen -W "image container" -- "$cur" ) )
                     return
                        ;;

	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--format -f --help --size -s --type" -- "$cur" ) )
			;;
		*)
			case $(__docker_value_of_option --type) in
				'')
					__docker_complete_containers_and_images
					;;
				container)
					__docker_complete_containers_all
					;;
				image)
					__docker_complete_images
					;;
			esac
	esac
}

_docker_kill() {
	case "$prev" in
		--signal|-s)
			__docker_complete_signals
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--help --signal -s" -- "$cur" ) )
			;;
		*)
			__docker_complete_containers_running
			;;
	esac
}

_docker_load() {
	case "$prev" in
		--input|-i)
			_filedir
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--help --input -i --quiet -q" -- "$cur" ) )
			;;
	esac
}

_docker_login() {
	case "$prev" in
		--password|-p|--username|-u)
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--help --password -p --username -u" -- "$cur" ) )
			;;
	esac
}

_docker_logout() {
	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--help" -- "$cur" ) )
			;;
	esac
}

_docker_logs() {
	case "$prev" in
		--since|--tail)
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--details --follow -f --help --since --tail --timestamps -t" -- "$cur" ) )
			;;
		*)
			local counter=$(__docker_pos_first_nonflag '--since|--tail')
			if [ $cword -eq $counter ]; then
				__docker_complete_containers_all
			fi
			;;
	esac
}

_docker_network_connect() {
	local options_with_args="
		--alias
		--ip
		--ip6
		--link
		--link-local-ip
	"

	local boolean_options="
		--help
	"

	case "$prev" in
		--link)
			case "$cur" in
				*:*)
					;;
				*)
					__docker_complete_containers_running
					COMPREPLY=( $( compgen -W "${COMPREPLY[*]}" -S ':' ) )
					__docker_nospace
					;;
			esac
			return
			;;
		$(__docker_to_extglob "$options_with_args") )
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "$boolean_options $options_with_args" -- "$cur" ) )
			;;
		*)
			local counter=$( __docker_pos_first_nonflag $( __docker_to_alternatives "$options_with_args" ) )
			if [ $cword -eq $counter ]; then
				__docker_complete_networks
			elif [ $cword -eq $(($counter + 1)) ]; then
				__docker_complete_containers_all
			fi
			;;
	esac
}

_docker_network_create() {
	case "$prev" in
		--aux-address|--gateway|--internal|--ip-range|--ipam-opt|--ipv6|--opt|-o|--subnet)
			return
			;;
		--ipam-driver)
			COMPREPLY=( $( compgen -W "default" -- "$cur" ) )
			return
			;;
		--driver|-d)
			# remove drivers that allow one instance only, add drivers missing in `docker info`
			__docker_complete_plugins --type Network --remove host --remove null --add macvlan
			return
			;;
		--label)
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--aux-address --driver -d --gateway --help --internal --ip-range --ipam-driver --ipam-opt --ipv6 --label --opt -o --subnet" -- "$cur" ) )
			;;
	esac
}

_docker_network_disconnect() {
	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--help" -- "$cur" ) )
			;;
		*)
			local counter=$(__docker_pos_first_nonflag)
			if [ $cword -eq $counter ]; then
				__docker_complete_networks
			elif [ $cword -eq $(($counter + 1)) ]; then
				__docker_complete_containers_in_network "$prev"
			fi
			;;
	esac
}

_docker_network_inspect() {
	case "$prev" in
		--format|-f)
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--format -f --help" -- "$cur" ) )
			;;
		*)
			__docker_complete_networks
	esac
}

_docker_network_ls() {
	local key=$(__docker_map_key_of_current_option '--filter|-f')
	case "$key" in
		driver)
			__docker_complete_plugins --cur "${cur##*=}" --type Network --add macvlan
			return
			;;
		id)
			__docker_complete_networks --cur "${cur##*=}" --id
			return
			;;
		name)
			__docker_complete_networks --cur "${cur##*=}" --name
			return
			;;
		type)
			COMPREPLY=( $( compgen -W "builtin custom" -- "${cur##*=}" ) )
			return
			;;
	esac

	case "$prev" in
		--filter|-f)
			COMPREPLY=( $( compgen -S = -W "driver id label name type" -- "$cur" ) )
			__docker_nospace
			return
			;;
		--format)
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--filter -f --format --help --no-trunc --quiet -q" -- "$cur" ) )
			;;
	esac
}

_docker_network_rm() {
	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--help" -- "$cur" ) )
			;;
		*)
			__docker_complete_networks --filter type=custom
	esac
}

_docker_network() {
	local subcommands="
		connect
		create
		disconnect
		inspect
		ls
		rm
	"
	__docker_subcommands "$subcommands" && return

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--help" -- "$cur" ) )
			;;
		*)
			COMPREPLY=( $( compgen -W "$subcommands" -- "$cur" ) )
			;;
	esac
}

_docker_service() {
	local subcommands="
		create
		inspect
		ls list
		rm remove
		scale
		ps
		update
	"
	__docker_subcommands "$subcommands" && return

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--help" -- "$cur" ) )
			;;
		*)
			COMPREPLY=( $( compgen -W "$subcommands" -- "$cur" ) )
			;;
	esac
}

_docker_service_create() {
	_docker_service_update
}

_docker_service_inspect() {
	case "$prev" in
		--format|-f)
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--format -f --help --pretty" -- "$cur" ) )
			;;
		*)
			__docker_complete_services
	esac
}

_docker_service_list() {
	_docker_service_ls
}

_docker_service_ls() {
	local key=$(__docker_map_key_of_current_option '--filter|-f')
	case "$key" in
		id)
			__docker_complete_services --cur "${cur##*=}" --id
			return
			;;
		name)
			__docker_complete_services --cur "${cur##*=}" --name
			return
			;;
	esac

	case "$prev" in
		--filter|-f)
			COMPREPLY=( $( compgen -W "id label name" -S = -- "$cur" ) )
			__docker_nospace
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--filter -f --help --quiet -q" -- "$cur" ) )
			;;
	esac
}

_docker_service_remove() {
	_docker_service_rm
}

_docker_service_rm() {
	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--help" -- "$cur" ) )
			;;
		*)
			__docker_complete_services
	esac
}

_docker_service_scale() {
	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--help" -- "$cur" ) )
			;;
		*)
			__docker_complete_services
			__docker_append_to_completions "="
			__docker_nospace
			;;
	esac
}

_docker_service_ps() {
	local key=$(__docker_map_key_of_current_option '--filter|-f')
	case "$key" in
		desired-state)
			COMPREPLY=( $( compgen -W "accepted running" -- "${cur##*=}" ) )
			return
			;;
		name)
			__docker_complete_services --cur "${cur##*=}" --name
			return
			;;
	esac

	case "$prev" in
		--filter|-f)
			COMPREPLY=( $( compgen -W "desired-state id name" -S = -- "$cur" ) )
			__docker_nospace
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--all -a --filter -f --help --no-resolve --no-trunc" -- "$cur" ) )
			;;
		*)
			local counter=$(__docker_pos_first_nonflag '--filter|-f')
			if [ $cword -eq $counter ]; then
				__docker_complete_services
			fi
			;;
	esac
}

_docker_service_update() {
	local $subcommand="${words[$subcommand_pos]}"

	local options_with_args="
		--constraint
		--endpoint-mode
		--env -e
		--group-add
		--label -l
		--limit-cpu
		--limit-memory
		--log-driver
		--log-opt
		--mount
		--name
		--network
		--publish -p
		--replicas
		--reserve-cpu
		--reserve-memory
		--restart-condition
		--restart-delay
		--restart-max-attempts
		--restart-window
		--rollback
		--stop-grace-period
		--update-delay
		--update-failure-action
		--update-max-failure-ratio
		--update-monitor
		--update-parallelism
		--user -u
		--workdir -w
	"

	local boolean_options="
		--help
		--with-registry-auth
	"

	__docker_complete_log_driver_options && return

	if [ "$subcommand" = "create" ] ; then
		options_with_args="$options_with_args
			--container-label
			--mode
		"

		case "$prev" in
			--mode)
				COMPREPLY=( $( compgen -W "global replicated" -- "$cur" ) )
				return
				;;
		esac
	fi
	if [ "$subcommand" = "update" ] ; then
		options_with_args="$options_with_args
			--arg
			--container-label-add
			--container-label-rm
			--group-rm
			--image
		"

		case "$prev" in
			--group-rm)
				COMPREPLY=( $(compgen -g -- "$cur") )
				return
				;;
			--image)
				__docker_complete_image_repos_and_tags
				return
				;;
		esac
	fi

	case "$prev" in
		--endpoint-mode)
			COMPREPLY=( $( compgen -W "dnsrr vip" -- "$cur" ) )
			return
			;;
		--env|-e)
			# we do not append a "=" here because "-e VARNAME" is legal systax, too
			COMPREPLY=( $( compgen -e -- "$cur" ) )
			__docker_nospace
			return
			;;
		--group-add)
			COMPREPLY=( $(compgen -g -- "$cur") )
			return
			;;
		--log-driver)
			__docker_complete_log_drivers
			return
			;;
		--log-opt)
			__docker_complete_log_options
			return
			;;
		--network)
			__docker_complete_networks
			return
			;;
		--restart-condition)
			COMPREPLY=( $( compgen -W "any none on-failure" -- "$cur" ) )
			return
			;;
		--user|-u)
			__docker_complete_user_group
			return
			;;
		$(__docker_to_extglob "$options_with_args") )
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "$boolean_options $options_with_args" -- "$cur" ) )
			;;
		*)
			if [ "$subcommand" = "update" ] ; then
				__docker_complete_services
			fi
	esac
}

_docker_swarm() {
	local subcommands="
		init
		join
		join-token
		leave
		update
	"
	__docker_subcommands "$subcommands" && return

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--help" -- "$cur" ) )
			;;
		*)
			COMPREPLY=( $( compgen -W "$subcommands" -- "$cur" ) )
			;;
	esac
}

_docker_swarm_init() {
	case "$prev" in
		--advertise-addr)
			if [[ $cur == *: ]] ; then
				COMPREPLY=( $( compgen -W "2377" -- "${cur##*:}" ) )
			else
				__docker_complete_local_interfaces
				__docker_nospace
			fi
			return
			;;
		--listen-addr)
			if [[ $cur == *: ]] ; then
				COMPREPLY=( $( compgen -W "2377" -- "${cur##*:}" ) )
			else
				__docker_complete_local_interfaces --add 0.0.0.0
				__docker_nospace
			fi
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--advertise-addr --force-new-cluster --help --listen-addr" -- "$cur" ) )
			;;
	esac
}

_docker_swarm_join() {
	case "$prev" in
		--advertise-addr)
			if [[ $cur == *: ]] ; then
				COMPREPLY=( $( compgen -W "2377" -- "${cur##*:}" ) )
			else
				__docker_complete_local_interfaces
				__docker_nospace
			fi
			return
			;;
		--listen-addr)
			if [[ $cur == *: ]] ; then
				COMPREPLY=( $( compgen -W "2377" -- "${cur##*:}" ) )
			else
				__docker_complete_local_interfaces --add 0.0.0.0
				__docker_nospace
			fi
			return
			;;
		--token)
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--advertise-addr --help --listen-addr --token" -- "$cur" ) )
			;;
		*:)
			COMPREPLY=( $( compgen -W "2377" -- "${cur##*:}" ) )
			;;
	esac
}

_docker_swarm_join-token() {
	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--help --quiet -q --rotate" -- "$cur" ) )
			;;
		*)
			local counter=$( __docker_pos_first_nonflag )
			if [ $cword -eq $counter ]; then
				COMPREPLY=( $( compgen -W "manager worker" -- "$cur" ) )
			fi
			;;
	esac
}

_docker_swarm_leave() {
	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--force --help" -- "$cur" ) )
			;;
	esac
}

_docker_swarm_update() {
	case "$prev" in
		--cert-expiry|--dispatcher-heartbeat|--task-history-limit)
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--cert-expiry --dispatcher-heartbeat --help --task-history-limit" -- "$cur" ) )
			;;
	esac
}

_docker_node() {
	local subcommands="
		demote
		inspect
		ls list
		promote
		rm remove
		ps
		update
	"
	__docker_subcommands "$subcommands" && return

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--help" -- "$cur" ) )
			;;
		*)
			COMPREPLY=( $( compgen -W "$subcommands" -- "$cur" ) )
			;;
	esac
}

_docker_node_demote() {
	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--help" -- "$cur" ) )
			;;
		*)
			__docker_complete_nodes --filter role=manager
	esac
}

_docker_node_inspect() {
	case "$prev" in
		--format|-f)
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--format -f --help --pretty" -- "$cur" ) )
			;;
		*)
			__docker_complete_nodes_plus_self
	esac
}

_docker_node_list() {
	_docker_node_ls
}

_docker_node_ls() {
	local key=$(__docker_map_key_of_current_option '--filter|-f')
	case "$key" in
		id)
			__docker_complete_nodes --cur "${cur##*=}" --id
			return
			;;
		name)
			__docker_complete_nodes --cur "${cur##*=}" --name
			return
			;;
	esac

	case "$prev" in
		--filter|-f)
			COMPREPLY=( $( compgen -W "id label name" -S = -- "$cur" ) )
			__docker_nospace
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--filter -f --help --quiet -q" -- "$cur" ) )
			;;
	esac
}

_docker_node_promote() {
	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--help" -- "$cur" ) )
			;;
		*)
			__docker_complete_nodes --filter role=worker
	esac
}

_docker_node_remove() {
	_docker_node_rm
}

_docker_node_rm() {
	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--force --help" -- "$cur" ) )
			;;
		*)
			__docker_complete_nodes
	esac
}

_docker_node_ps() {
	local key=$(__docker_map_key_of_current_option '--filter|-f')
	case "$key" in
		desired-state)
			COMPREPLY=( $( compgen -W "accepted running" -- "${cur##*=}" ) )
			return
			;;
		name)
			__docker_complete_services --cur "${cur##*=}" --name
			return
			;;
	esac

	case "$prev" in
		--filter|-f)
			COMPREPLY=( $( compgen -W "desired-state id label name" -S = -- "$cur" ) )
			__docker_nospace
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--all -a --filter -f --help --no-resolve --no-trunc" -- "$cur" ) )
			;;
		*)
			__docker_complete_nodes_plus_self
			;;
	esac
}

_docker_node_update() {
	case "$prev" in
		--availability)
			COMPREPLY=( $( compgen -W "active drain pause" -- "$cur" ) )
			return
			;;
		--role)
			COMPREPLY=( $( compgen -W "manager worker" -- "$cur" ) )
			return
			;;
		--label-add|--label-rm)
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--availability --help --label-add --label-rm --role" -- "$cur" ) )
			;;
		*)
			__docker_complete_nodes
	esac
}

_docker_pause() {
	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--help" -- "$cur" ) )
			;;
		*)
			local counter=$(__docker_pos_first_nonflag)
			if [ $cword -eq $counter ]; then
				__docker_complete_containers_running
			fi
			;;
	esac
}

_docker_port() {
	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--help" -- "$cur" ) )
			;;
		*)
			local counter=$(__docker_pos_first_nonflag)
			if [ $cword -eq $counter ]; then
				__docker_complete_containers_all
			fi
			;;
	esac
}

_docker_ps() {
	local key=$(__docker_map_key_of_current_option '--filter|-f')
	case "$key" in
		ancestor)
			cur="${cur##*=}"
			__docker_complete_images
			return
			;;
		before)
			__docker_complete_containers_all --cur "${cur##*=}"
			return
			;;
		id)
			__docker_complete_containers_all --cur "${cur##*=}" --id
			return
			;;
		is-task)
			COMPREPLY=( $( compgen -W "true false" -- "${cur##*=}" ) )
			return
			;;
		name)
			__docker_complete_containers_all --cur "${cur##*=}" --name
			return
			;;
		network)
			__docker_complete_networks --cur "${cur##*=}"
			return
			;;
		since)
			__docker_complete_containers_all --cur "${cur##*=}"
			return
			;;
		status)
			COMPREPLY=( $( compgen -W "created dead exited paused restarting running removing" -- "${cur##*=}" ) )
			return
			;;
		volume)
			__docker_complete_volumes --cur "${cur##*=}"
			return
			;;
	esac

	case "$prev" in
		--filter|-f)
			COMPREPLY=( $( compgen -S = -W "ancestor before exited id label name network since status volume" -- "$cur" ) )
			__docker_nospace
			return
			;;
		--format|--last|-n)
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--all -a --filter -f --format --help --last -n --latest -l --no-trunc --quiet -q --size -s" -- "$cur" ) )
			;;
	esac
}

_docker_pull() {
	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--all-tags -a --disable-content-trust=false --help" -- "$cur" ) )
			;;
		*)
			local counter=$(__docker_pos_first_nonflag)
			if [ $cword -eq $counter ]; then
				for arg in "${COMP_WORDS[@]}"; do
					case "$arg" in
						--all-tags|-a)
							__docker_complete_image_repos
							return
							;;
					esac
				done
				__docker_complete_image_repos_and_tags
			fi
			;;
	esac
}

_docker_push() {
	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--disable-content-trust=false --help" -- "$cur" ) )
			;;
		*)
			local counter=$(__docker_pos_first_nonflag)
			if [ $cword -eq $counter ]; then
				__docker_complete_image_repos_and_tags
			fi
			;;
	esac
}

_docker_rename() {
	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--help" -- "$cur" ) )
			;;
		*)
			local counter=$(__docker_pos_first_nonflag)
			if [ $cword -eq $counter ]; then
				__docker_complete_containers_all
			fi
			;;
	esac
}

_docker_restart() {
	case "$prev" in
		--time|-t)
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--help --time -t" -- "$cur" ) )
			;;
		*)
			__docker_complete_containers_all
			;;
	esac
}

_docker_rm() {
	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--force -f --help --link -l --volumes -v" -- "$cur" ) )
			;;
		*)
			for arg in "${COMP_WORDS[@]}"; do
				case "$arg" in
					--force|-f)
						__docker_complete_containers_all
						return
						;;
				esac
			done
			__docker_complete_containers_stopped
			;;
	esac
}

_docker_rmi() {
	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--force -f --help --no-prune" -- "$cur" ) )
			;;
		*)
			__docker_complete_images
			;;
	esac
}

_docker_run() {
	local options_with_args="
		--add-host
		--attach -a
		--blkio-weight
		--blkio-weight-device
		--cap-add
		--cap-drop
		--cgroup-parent
		--cidfile
		--cpu-period
		--cpu-quota
		--cpuset-cpus
		--cpuset-mems
		--cpu-shares -c
		--device
		--device-read-bps
		--device-read-iops
		--device-write-bps
		--device-write-iops
		--dns
		--dns-opt
		--dns-search
		--entrypoint
		--env -e
		--env-file
		--expose
		--group-add
		--hostname -h
		--ip
		--ip6
		--ipc
		--isolation
		--kernel-memory
		--label-file
		--label -l
		--link
		--link-local-ip
		--log-driver
		--log-opt
		--mac-address
		--memory -m
		--memory-swap
		--memory-swappiness
		--memory-reservation
		--name
		--network
		--network-alias
		--oom-score-adj
		--pid
		--pids-limit
		--publish -p
		--restart
		--runtime
		--security-opt
		--shm-size
		--stop-signal
		--stop-timeout
		--storage-opt
		--tmpfs
		--sysctl
		--ulimit
		--user -u
		--userns
		--uts
		--volume-driver
		--volumes-from
		--volume -v
		--workdir -w
	"

	local boolean_options="
		--disable-content-trust=false
		--help
		--interactive -i
		--oom-kill-disable
		--privileged
		--publish-all -P
		--read-only
		--tty -t
	"

	if [ "$command" = "run" ] ; then
		options_with_args="$options_with_args
			--detach-keys
			--health-cmd
			--health-interval
			--health-retries
			--health-timeout
		"
		boolean_options="$boolean_options
			--detach -d
			--no-healthcheck
			--rm
			--sig-proxy=false
		"
		__docker_complete_detach-keys && return
	fi

	local all_options="$options_with_args $boolean_options"


	__docker_complete_log_driver_options && return
	__docker_complete_restart && return

	local key=$(__docker_map_key_of_current_option '--security-opt')
	case "$key" in
		label)
			[[ $cur == *: ]] && return
			COMPREPLY=( $( compgen -W "user: role: type: level: disable" -- "${cur##*=}") )
			if [ "${COMPREPLY[*]}" != "disable" ] ; then
				__docker_nospace
			fi
			return
			;;
		seccomp)
			local cur=${cur##*=}
			_filedir
			COMPREPLY+=( $( compgen -W "unconfined" -- "$cur" ) )
			return
			;;
	esac

	case "$prev" in
		--add-host)
			case "$cur" in
				*:)
					__docker_complete_resolved_hostname
					return
					;;
			esac
			;;
		--attach|-a)
			COMPREPLY=( $( compgen -W 'stdin stdout stderr' -- "$cur" ) )
			return
			;;
		--cap-add|--cap-drop)
			__docker_complete_capabilities
			return
			;;
		--cidfile|--env-file|--label-file)
			_filedir
			return
			;;
		--device|--tmpfs|--volume|-v)
			case "$cur" in
				*:*)
					# TODO somehow do _filedir for stuff inside the image, if it's already specified (which is also somewhat difficult to determine)
					;;
				'')
					COMPREPLY=( $( compgen -W '/' -- "$cur" ) )
					__docker_nospace
					;;
				/*)
					_filedir
					__docker_nospace
					;;
			esac
			return
			;;
		--env|-e)
			# we do not append a "=" here because "-e VARNAME" is legal systax, too
			COMPREPLY=( $( compgen -e -- "$cur" ) )
			__docker_nospace
			return
			;;
		--ipc)
			case "$cur" in
				*:*)
					cur="${cur#*:}"
					__docker_complete_containers_running
					;;
				*)
					COMPREPLY=( $( compgen -W 'host container:' -- "$cur" ) )
					if [ "$COMPREPLY" = "container:" ]; then
						__docker_nospace
					fi
					;;
			esac
			return
			;;
		--isolation)
			__docker_complete_isolation
			return
			;;
		--link)
			case "$cur" in
				*:*)
					;;
				*)
					__docker_complete_containers_running
					COMPREPLY=( $( compgen -W "${COMPREPLY[*]}" -S ':' ) )
					__docker_nospace
					;;
			esac
			return
			;;
		--log-driver)
			__docker_complete_log_drivers
			return
			;;
		--log-opt)
			__docker_complete_log_options
			return
			;;
		--network)
			case "$cur" in
				container:*)
					__docker_complete_containers_all --cur "${cur#*:}"
					;;
				*)
					COMPREPLY=( $( compgen -W "$(__docker_plugins --type Network) $(__docker_networks) container:" -- "$cur") )
					if [ "${COMPREPLY[*]}" = "container:" ] ; then
						__docker_nospace
					fi
					;;
			esac
			return
			;;
		--pid)
			case "$cur" in
				*:*)
					__docker_complete_containers_running --cur "${cur#*:}"
					;;
				*)
					COMPREPLY=( $( compgen -W 'host container:' -- "$cur" ) )
					if [ "$COMPREPLY" = "container:" ]; then
						__docker_nospace
					fi
					;;
			esac
			return
			;;
		--runtime)
			__docker_complete_runtimes
			return
			;;
		--security-opt)
			COMPREPLY=( $( compgen -W "apparmor= label= no-new-privileges seccomp=" -- "$cur") )
			if [ "${COMPREPLY[*]}" != "no-new-privileges" ] ; then
				__docker_nospace
			fi
			return
			;;
		--storage-opt)
			COMPREPLY=( $( compgen -W "size" -S = -- "$cur") )
			__docker_nospace
			return
			;;
		--user|-u)
			__docker_complete_user_group
			return
			;;
		--userns)
			COMPREPLY=( $( compgen -W "host" -- "$cur" ) )
			return
			;;
		--volume-driver)
			__docker_complete_plugins --type Volume
			return
			;;
		--volumes-from)
			__docker_complete_containers_all
			return
			;;
		$(__docker_to_extglob "$options_with_args") )
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "$all_options" -- "$cur" ) )
			;;
		*)
			local counter=$( __docker_pos_first_nonflag $( __docker_to_alternatives "$options_with_args" ) )
			if [ $cword -eq $counter ]; then
				__docker_complete_images
			fi
			;;
	esac
}

_docker_save() {
	case "$prev" in
		--output|-o)
			_filedir
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--help --output -o" -- "$cur" ) )
			;;
		*)
			__docker_complete_images
			;;
	esac
}

_docker_search() {
	local key=$(__docker_map_key_of_current_option '--filter|-f')
	case "$key" in
		is-automated)
			COMPREPLY=( $( compgen -W "false true" -- "${cur##*=}" ) )
			return
			;;
		is-official)
			COMPREPLY=( $( compgen -W "false true" -- "${cur##*=}" ) )
			return
			;;
	esac

	case "$prev" in
		--filter|-f)
			COMPREPLY=( $( compgen -S = -W "is-automated is-official stars" -- "$cur" ) )
			__docker_nospace
			return
			;;
		--limit)
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--filter --help --limit --no-trunc" -- "$cur" ) )
			;;
	esac
}

_docker_start() {
	__docker_complete_detach-keys && return

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--attach -a --detach-keys --help --interactive -i" -- "$cur" ) )
			;;
		*)
			__docker_complete_containers_stopped
			;;
	esac
}

_docker_stats() {
	case "$prev" in
		--format)
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--all -a --format --help --no-stream" -- "$cur" ) )
			;;
		*)
			__docker_complete_containers_running
			;;
	esac
}

_docker_stop() {
	case "$prev" in
		--time|-t)
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--help --time -t" -- "$cur" ) )
			;;
		*)
			__docker_complete_containers_running
			;;
	esac
}

_docker_tag() {
	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--help" -- "$cur" ) )
			;;
		*)
			local counter=$(__docker_pos_first_nonflag)

			if [ $cword -eq $counter ]; then
				__docker_complete_image_repos_and_tags
				return
			fi
			(( counter++ ))

			if [ $cword -eq $counter ]; then
				__docker_complete_image_repos_and_tags
				return
			fi
			;;
	esac
}

_docker_unpause() {
	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--help" -- "$cur" ) )
			;;
		*)
			local counter=$(__docker_pos_first_nonflag)
			if [ $cword -eq $counter ]; then
				__docker_complete_containers_unpauseable
			fi
			;;
	esac
}

_docker_update() {
	local options_with_args="
		--blkio-weight
		--cpu-period
		--cpu-quota
		--cpuset-cpus
		--cpuset-mems
		--cpu-shares -c
		--kernel-memory
		--memory -m
		--memory-reservation
		--memory-swap
		--restart
	"

	local boolean_options="
		--help
	"

	local all_options="$options_with_args $boolean_options"

	__docker_complete_restart && return

	case "$prev" in
		$(__docker_to_extglob "$options_with_args") )
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "$all_options" -- "$cur" ) )
			;;
		*)
			__docker_complete_containers_all
			;;
	esac
}

_docker_top() {
	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--help" -- "$cur" ) )
			;;
		*)
			local counter=$(__docker_pos_first_nonflag)
			if [ $cword -eq $counter ]; then
				__docker_complete_containers_running
			fi
			;;
	esac
}

_docker_version() {
	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--help" -- "$cur" ) )
			;;
	esac
}

_docker_volume_create() {
	case "$prev" in
		--driver|-d)
			__docker_complete_plugins --type Volume
			return
			;;
		--label|--opt|-o)
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--driver -d --help --label --opt -o" -- "$cur" ) )
			;;
	esac
}

_docker_volume_inspect() {
	case "$prev" in
		--format|-f)
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--format -f --help" -- "$cur" ) )
			;;
		*)
			__docker_complete_volumes
			;;
	esac
}

_docker_volume_ls() {
	local key=$(__docker_map_key_of_current_option '--filter|-f')
	case "$key" in
		dangling)
			COMPREPLY=( $( compgen -W "true false" -- "${cur##*=}" ) )
			return
			;;
		driver)
			__docker_complete_plugins --cur "${cur##*=}" --type Volume
			return
			;;
		name)
			__docker_complete_volumes --cur "${cur##*=}"
			return
			;;
	esac

	case "$prev" in
		--filter|-f)
			COMPREPLY=( $( compgen -S = -W "dangling driver label name" -- "$cur" ) )
			__docker_nospace
			return
			;;
		--format)
			return
			;;
	esac

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--filter -f --format --help --quiet -q" -- "$cur" ) )
			;;
	esac
}

_docker_volume_rm() {
	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--force -f --help" -- "$cur" ) )
			;;
		*)
			__docker_complete_volumes
			;;
	esac
}

_docker_volume() {
	local subcommands="
		create
		inspect
		ls
		rm
	"
	__docker_subcommands "$subcommands" && return

	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--help" -- "$cur" ) )
			;;
		*)
			COMPREPLY=( $( compgen -W "$subcommands" -- "$cur" ) )
			;;
	esac
}

_docker_wait() {
	case "$cur" in
		-*)
			COMPREPLY=( $( compgen -W "--help" -- "$cur" ) )
			;;
		*)
			__docker_complete_containers_all
			;;
	esac
}

_docker() {
	local previous_extglob_setting=$(shopt -p extglob)
	shopt -s extglob

	local commands=(
		attach
		build
		commit
		cp
		create
		daemon
		diff
		events
		exec
		export
		history
		images
		import
		info
		inspect
		kill
		load
		login
		logout
		logs
		network
		node
		pause
		port
		ps
		pull
		push
		rename
		restart
		rm
		rmi
		run
		save
		search
		service
		start
		stats
		stop
		swarm
		tag
		top
		unpause
		update
		version
		volume
		wait
	)

	# These options are valid as global options for all client commands
	# and valid as command options for `docker daemon`
	local global_boolean_options="
		--debug -D
		--tls
		--tlsverify
	"
	local global_options_with_args="
		--config
		--host -H
		--log-level -l
		--tlscacert
		--tlscert
		--tlskey
	"

	local host config

	COMPREPLY=()
	local cur prev words cword
	_get_comp_words_by_ref -n : cur prev words cword

	local command='docker' command_pos=0 subcommand_pos
	local counter=1
	while [ $counter -lt $cword ]; do
		case "${words[$counter]}" in
			# save host so that completion can use custom daemon
			--host|-H)
				(( counter++ ))
				host="${words[$counter]}"
				;;
			# save config so that completion can use custom configuration directories
			--config)
				(( counter++ ))
				config="${words[$counter]}"
				;;
			$(__docker_to_extglob "$global_options_with_args") )
				(( counter++ ))
				;;
			-*)
				;;
			=)
				(( counter++ ))
				;;
			*)
				command="${words[$counter]}"
				command_pos=$counter
				break
				;;
		esac
		(( counter++ ))
	done

	local binary="${words[0]}"
	if [[ $binary == ?(*/)dockerd ]] ; then
		# for the dockerd binary, we reuse completion of `docker daemon`.
		# dockerd does not have subcommands and global options.
		command=daemon
		command_pos=0
	fi

	local completions_func=_docker_${command}
	declare -F $completions_func >/dev/null && $completions_func

	eval "$previous_extglob_setting"
	return 0
}

eval "$__docker_previous_extglob_setting"
unset __docker_previous_extglob_setting

complete -F _docker docker dockerd