add bash completion support

This fixes #188.

Makefile

@@ -13,7 +13,8 @@ MK=			${TOP}/mk
 
 include ${TOP}/Makefile.inc
 
-SUBDIR=		conf.d etc init.d local.d man scripts sh src support sysctl.d
+SUBDIR=		bash-completion conf.d etc init.d local.d man scripts sh src \
+			support sysctl.d
 
 # Build pkgconfig or not
 MKPKGCONFIG?=	yes

bash-completion/Makefile

@@ -0,0 +1,11 @@
+DIR=	${BASHCOMPDIR}
+CONF=	openrc \
+		openrc-service-script \
+		rc-service \
+		rc-status \
+		rc-update \
+
+MK=	../mk
+include ${MK}/os.mk
+
+include ${MK}/scripts.mk

bash-completion/openrc

@@ -0,0 +1,24 @@
+# Copyright (c) 2017 The OpenRC Authors.
+# See the Authors file at the top-level directory of this distribution and
+# https://github.com/OpenRC/openrc/blob/master/AUTHORS
+#
+# This file is part of OpenRC. It is subject to the license terms in
+# the LICENSE file found in the top-level directory of this
+# distribution and at https://github.com/OpenRC/openrc/blob/master/LICENSE
+# This file may not be copied, modified, propagated, or distributed
+# except according to the terms contained in the LICENSE file.
+
+#
+# openrc completion command
+#
+_openrc()
+{
+	local cur
+	COMPREPLY=()
+	cur="${COMP_WORDS[COMP_CWORD]}"
+	if [[ ${#COMP_WORDS[*]} -le 2 ]]; then
+		COMPREPLY=($(compgen -W "$(rc-status --list)" -- $cur))
+	fi
+	return 0
+} &&
+complete -F _openrc openrc

bash-completion/openrc-service-script

@@ -0,0 +1,29 @@
+# Copyright (c) 2017 The OpenRC Authors.
+# See the Authors file at the top-level directory of this distribution and
+# https://github.com/OpenRC/openrc/blob/master/AUTHORS
+#
+# This file is part of OpenRC. It is subject to the license terms in
+# the LICENSE file found in the top-level directory of this
+# distribution and at https://github.com/OpenRC/openrc/blob/master/LICENSE
+# This file may not be copied, modified, propagated, or distributed
+# except according to the terms contained in the LICENSE file.
+
+_openrc_service_script()
+{
+	local script="${COMP_WORDS[0]}"
+	local cur="${COMP_WORDS[$COMP_CWORD]}"
+
+	if [[ ( -f "${script}" || -h "${script}" ) && -r "${script}" ]] \
+	&& [[ "$(head -n 1 "${script}")" =~ \#\!.*/openrc-run ]]
+	then
+		[[ $COMP_CWORD -gt 1 ]] && return 1
+		COMPREPLY=($(opts="start stop status restart pause zap ineed needsme iuse usesme broken"; \
+			eval "$(grep '^opts=' "${script}")"; echo "${opts}"))
+		[[ -n "$COMPREPLY" ]] || COMPREPLY=(start stop restart zap)
+		COMPREPLY=($(compgen -W "${COMPREPLY[*]}" -- "${cur}"))
+	else
+		COMPREPLY=($(compgen -o default -- "${cur}"))
+	fi
+	return 0
+}
+complete -F _openrc_service_script */etc/init.d/*

bash-completion/rc-service

@@ -0,0 +1,113 @@
+# Copyright (c) 2017 The OpenRC Authors.
+# See the Authors file at the top-level directory of this distribution and
+# https://github.com/OpenRC/openrc/blob/master/AUTHORS
+#
+# This file is part of OpenRC. It is subject to the license terms in
+# the LICENSE file found in the top-level directory of this
+# distribution and at https://github.com/OpenRC/openrc/blob/master/LICENSE
+# This file may not be copied, modified, propagated, or distributed
+# except according to the terms contained in the LICENSE file.
+
+#
+# rc-service completion command
+#
+_rc_service()
+{
+	local cur prev numwords opts
+	local words i x filename
+	local action actionpos
+	COMPREPLY=()
+	cur="${COMP_WORDS[COMP_CWORD]}"
+	prev="${COMP_WORDS[COMP_CWORD-1]}"
+	numwords=${#COMP_WORDS[*]}
+
+	if [[ ${prev} == '>' || ${prev} == '<' ]] ; then
+		COMPREPLY=($(compgen -f -- ${cur}))
+		return 0
+	fi
+
+	# find action
+	for x in ${COMP_LINE} ; do
+		if [[ ${x} =~ --(list|exists|resolve) ]] || [[ ${x} =~ -(l|e|r) ]]
+		then
+			action=${x}
+			break
+		fi
+	done
+	if [[ -n ${action} ]]; then
+		for ((i = 0; i < ${numwords}; i++ )); do
+			if [[ ${COMP_WORDS[${i}]} == "${action}" ]]; then
+				actionpos=${i}
+				break
+			fi
+		done
+
+		for ((i = 1; i < ${numwords}; i++ )); do
+			if [[ ! ${COMP_WORDS[$i]} == -* ]]; then
+				break
+			fi
+		done
+	fi
+
+	if [[ ${COMP_CWORD} -eq 3 ]]; then
+		return 1
+	fi
+
+	# check if an option was typed
+	if [[ ${cur} == -* ]]; then
+		if [[ ${cur} == --* ]]; then
+			opts="--list --exists --resolve"
+			COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
+			return 0
+		elif [[ ${cur} == -* ]]; then
+			opts="-l -e -r"
+			COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
+			return 0
+		fi
+
+		# NOTE: This slows things down!
+		# (Adapted from bash_completion by Ian Macdonald <ian@caliban.org>)
+		# This removes any options from the list of completions that have
+		# already been specified on the command line.
+		COMPREPLY=($(echo "${COMP_WORDS[@]}" | \
+		(while read -d ' ' i; do
+			[[ -z ${i} ]] && continue
+			# flatten array with spaces on either side,
+			# otherwise we cannot grep on word boundaries of
+			# first and last word
+			COMPREPLY=" ${COMPREPLY[@]} "
+			# remove word from list of completions
+			COMPREPLY=(${COMPREPLY/ ${i%% *} / })
+		done
+		echo ${COMPREPLY[@]})))
+
+		return 0
+	else
+		# no option was typed
+		if [[ ${COMP_CWORD} -eq 1 ]]; then			  # if first word typed
+			words="$(rc-service --list | grep ^${cur})"		  # complete for init scripts
+			COMPREPLY=($(for i in ${words} ; do \
+			[[ ${i} == ${cur}* ]] && echo ${i} ; \
+			done))
+			return 0
+		elif [[ ${COMP_CWORD} -eq 2 ]] && [[ ${prev} != -* ]]; then # if second word typed and we didn't type in a function
+			filename=$(rc-service --resolve ${prev})
+			opts=$(cat ${filename} | grep "^\w*()" | sed "s/().*$//")	# Greps the functions included in the init script
+			if [[ "x${opts}" == "x" ]] ; then			   # if no options found loosen the grep algorhythm
+				opts=$(cat ${filename} | grep "\w*()" | sed "s/().*$//")
+			fi
+			COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
+			return 0
+		fi
+	fi
+	if [[ ${action} == '--exists' ]] || [[ ${action} == '-e' ]] || \
+		[[ ${action} == '--resolve' ]]  || [[ ${action} == '-r' ]]; then
+		words="$(rc-service --list | grep ^${cur})"
+		COMPREPLY=($(for i in ${words} ; do \
+			[[ ${i} == ${cur}* ]] && echo ${i} ; \
+		done))
+		return 0
+	fi
+	return 0
+} &&
+complete -F _rc_service rc-service

bash-completion/rc-status

@@ -0,0 +1,31 @@
+# Copyright (c) 2017 The OpenRC Authors.
+# See the Authors file at the top-level directory of this distribution and
+# https://github.com/OpenRC/openrc/blob/master/AUTHORS
+#
+# This file is part of OpenRC. It is subject to the license terms in
+# the LICENSE file found in the top-level directory of this
+# distribution and at https://github.com/OpenRC/openrc/blob/master/LICENSE
+# This file may not be copied, modified, propagated, or distributed
+# except according to the terms contained in the LICENSE file.
+
+#
+# rc-status completion command
+#
+_rcstatus()
+{
+	local cur
+	cur="${COMP_WORDS[COMP_CWORD]}"
+	if [[ $COMP_CWORD -eq 1 ]]; then
+		if [[ "${cur}" == --* ]]; then
+			COMPREPLY=($(compgen -W '--all --list --unused' -- ${cur}))
+		elif [[ "${cur}" == -* ]]; then
+			COMPREPLY=($(compgen -W '-a -l -u' -- ${cur}))
+		else
+			COMPREPLY=($(compgen -W "$(rc-status --list)" -- ${cur}))
+		fi
+	else
+		unset COMPREPLY
+	fi
+	return 0
+} &&
+complete -F _rcstatus rc-status

bash-completion/rc-update

@@ -0,0 +1,42 @@
+# Copyright (c) 2017 The OpenRC Authors.
+# See the Authors file at the top-level directory of this distribution and
+# https://github.com/OpenRC/openrc/blob/master/AUTHORS
+#
+# This file is part of OpenRC. It is subject to the license terms in
+# the LICENSE file found in the top-level directory of this
+# distribution and at https://github.com/OpenRC/openrc/blob/master/LICENSE
+# This file may not be copied, modified, propagated, or distributed
+# except according to the terms contained in the LICENSE file.
+
+#
+# rc-update completion command
+#
+_rc_update()
+{
+	local cur show
+	COMPREPLY=()
+	cur="${COMP_WORDS[COMP_CWORD]}"
+	if [[ $COMP_CWORD -eq 1 ]]; then
+		if [[ "${cur}" == -* ]]; then
+			COMPREPLY=($(compgen -W '-a -d -s' -- ${cur}))
+		else
+			COMPREPLY=($(compgen -W 'add del show' ${cur}))
+		fi
+	else
+		if [[ "${COMP_WORDS[1]}" == "show" ]] || [[ "${COMP_WORDS[1]}" == "-s" ]]; then
+			show="TRUE"
+		fi
+		if ([[ $COMP_CWORD -eq 3 ]] && [[ -z "$show" ]]) || \
+			([[ $COMP_CWORD -eq 2 ]] && [[ -n "$show" ]]); then
+		COMPREPLY=($(compgen -W "$(rc-status --list)" -- $cur))
+		elif [[ $COMP_CWORD -eq 2 ]]; then
+			COMPREPLY=($(compgen -W "$(rc-service --list)" $cur))
+		elif [[ ${#COMP_WORDS[*]} -gt 2 ]] ; then
+			COMPREPLY=($(compgen -W "$(rc-status --list)" -- $cur))
+		else
+			unset COMPREPLY
+		fi
+	fi
+	return 0
+} &&
+complete -F _rc_update rc-update

mk/sys.mk

@@ -59,6 +59,8 @@ MANPREFIX?=		${UPREFIX}/share
 MANDIR?=		${MANPREFIX}/man
 MANMODE?=		0444
 
+BASHCOMPDIR?=		${UPREFIX}/share/bash-completion/completions
+
 DATADIR?=		${UPREFIX}/share/openrc
 DATAMODE?=		0644