bash: add completion for systemd-nspawn

Makefile.am

@@ -354,6 +354,7 @@ dist_bashcompletion_DATA = \
 	shell-completion/bash/systemctl \
 	shell-completion/bash/systemd-analyze \
 	shell-completion/bash/systemd-delta \
+	shell-completion/bash/systemd-nspawn \
 	shell-completion/bash/systemd-run \
 	shell-completion/bash/udevadm \
 	shell-completion/bash/kernel-install

shell-completion/bash/systemd-nspawn

@@ -0,0 +1,112 @@
+# systemd-nspawn(1) completion                  -*- shell-script -*-
+#
+# This file is part of systemd.
+#
+# Copyright 2014 Thomas H.P. Andersen
+#
+# systemd is free software; you can redistribute it and/or modify it
+# under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation; either version 2.1 of the License, or
+# (at your option) any later version.
+#
+# systemd is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with systemd; If not, see <http://www.gnu.org/licenses/>.
+
+__contains_word() {
+        local w word=$1; shift
+        for w in "$@"; do
+                [[ $w = "$word" ]] && return
+        done
+}
+
+__get_users() {
+        local a b
+        loginctl list-users --no-legend --no-pager | { while read a b; do echo " $b"; done; };
+}
+
+__get_slices() {
+        local a b
+        systemctl list-units -t slice --no-legend --no-pager | { while read a b; do echo " $a"; done; };
+}
+
+_systemd_nspawn() {
+        local cur=${COMP_WORDS[COMP_CWORD]} prev=${COMP_WORDS[COMP_CWORD-1]}
+        local i verb comps
+
+        local -A OPTS=(
+               [STANDALONE]='-h --help --version --private-network -b --boot --read-only -q --quiet --share-system --keep-unit --network-veth -j'
+                      [ARG]='-D --directory -u --user --uuid --capability --drop-capability --link-journal --bind --bind-ro -M --machine
+                             -S --slice --setenv -Z --selinux-context -L --selinux-apifs-context --register --network-interface --network-bridge
+                             --personality'
+        )
+
+        _init_completion || return
+
+        if __contains_word "$prev" ${OPTS[ARG]}; then
+                case $prev in
+                        --directory|-D)
+                                comps=$(compgen -A directory -- "$cur" )
+                        ;;
+                        --user|-u)
+                                comps=$( __get_users )
+                        ;;
+                        --uuid)
+                                comps=''
+                        ;;
+                        --capability)
+                                comps='CAP_BLOCK_SUSPEND CAP_IPC_LOCK CAP_MAC_ADMIN CAP_MAC_OVERRIDE CAP_SYS_MODULE CAP_SYS_PACCT CAP_SYS_RAWIO
+                                       CAP_SYS_TIME CAP_SYSLOG CAP_WAKE_ALARM CAP_NET_ADMIN'
+                        ;;
+                        --drop-capability)
+                                comps='CAP_AUDIT_CONTROL CAP_AUDIT_WRITE CAP_CHOWN CAP_DAC_OVERRIDE CAP_DAC_READ_SEARCH CAP_FOWNER CAP_FSETID
+                                       CAP_IPC_OWNER CAP_KILL CAP_LEASE CAP_LINUX_IMMUTABLE CAP_MKNOD CAP_NET_ADMIN CAP_NET_BIND_SERVICE
+                                       CAP_NET_BROADCAST CAP_NET_RAW CAP_SETFCAP CAP_SETGID CAP_SETPCAP CAP_SETUID CAP_SYS_ADMIN CAP_SYS_BOOT
+                                       CAP_SYS_CHROOT CAP_SYS_NICE CAP_SYS_PTRACE CAP_SYS_RESOURCE CAP_SYS_TTY_CONFIG'
+                        ;;
+                        --link-journal)
+                                comps='no auto guest host'
+                        ;;
+                        --bind|--bind-ro)
+                                comps=''
+                        ;;
+                        --machine|-M)
+                                comps=''
+                        ;;
+                        --slice|-S)
+                                comps=$( __get_slices )
+                        ;;
+                        --setenv)
+                                comps=''
+                        ;;
+                        --selinux-context|-Z)
+                                comps=''
+                        ;;
+                        --selinux-apifs-context|-L)
+                                comps=''
+                        ;;
+                        --register)
+                                comps='yes no'
+                        ;;
+                        --network-interface)
+                                comps=''
+                        ;;
+                        --network-bridge)
+                                comps=''
+                        ;;
+                        --personality)
+                                comps='x86 x86-64'
+                        ;;
+                esac
+                COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
+                return 0
+        fi
+
+        COMPREPLY=( $(compgen -W '${OPTS[*]}' -- "$cur") )
+}
+
+complete -F _systemd_nspawn systemd-nspawn