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systemd/shell-completion/bash/portablectl
Luca Boccassi e26fe5f911 portable: add 'reattach' verb and DBUS interface
Add 'reattach' verb to portablectl, and corresponding DBUS interface
to systemd-portabled.
Takes the same parameters as 'attach', but it will do a 'detach' (and
it will refuse to proceed if it cannot be done) first, matching on
the unversioned prefix of the new image. Eg:

portablectl reattach /tmp/foo_2.raw

will cause foo_1.raw to be detached, and foo_2.raw to be attached.

The key difference with a manual 'detach old' plus 'attach new' is that
the running units are not disturbed until after the attach completed,
and if --now is passed they are then restarted.
A 'detach' is not allowed normally if the units are running.

By using a restart-after-deploy method, 'reattach' allows for minimal
interruption of service and also for features that only work on restart
(eg: file descriptor store) to work as intended.

The DBUS interface returns two lists: first the removals from the detach
that were not immediately re-added in the attach, so that the caller
can stop the relevant units, and then the list of additions that are
either new or updates, so that the caller can restart/enable the
relevant units. portablectl already implements this with the existing
--now/--enable switches.
2021-02-10 19:07:36 +00:00

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# portablectl(1) completion -*- shell-script -*-
# SPDX-License-Identifier: LGPL-2.1-or-later
#
# This file is part of systemd.
#
# 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_machines() {
local a b
machinectl list --full --no-legend --no-pager 2>/dev/null |
{ while read a b; do echo " $a"; done; };
}
_portablectl() {
local i n comps verb
local cur=${COMP_WORDS[COMP_CWORD]} prev=${COMP_WORDS[COMP_CWORD-1]}
local -A OPTS=(
[STANDALONE]='-q --quiet --runtime --no-reload --cat --no-pager --no-legend
--no-ask-password --enable --now -h --help --version'
[ARG]='-p --profile --copy -H --host -M --machine'
)
local -A VERBS=(
[STANDALONE]='list'
[IMAGE]='attach detach reattach inspect is-attached set-limit'
[IMAGES]='remove'
[IMAGE_WITH_BOOL]='read-only'
)
if __contains_word "$prev" ${OPTS[ARG]}; then
case $prev in
--profile|-p)
comps="default nonetwork strict trusted"
;;
--copy)
comps="copy symlink auto"
;;
--host|-H)
comps=$(compgen -A hostname)
;;
--machine|-M)
comps=$( __get_machines )
;;
esac
COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
return 0
fi
if [[ "$cur" = -* ]]; then
COMPREPLY=( $(compgen -W '${OPTS[*]}' -- "$cur") )
return 0
fi
for ((i=0; i < COMP_CWORD; i++)); do
if __contains_word "${COMP_WORDS[i]}" ${VERBS[*]} &&
! __contains_word "${COMP_WORDS[i-1]}" ${OPTS[ARG]}; then
verb=${COMP_WORDS[i]}
break
fi
done
n=$(($COMP_CWORD - $i))
if [[ -z $verb ]]; then
comps=${VERBS[*]}
elif __contains_word "$verb" ${VERBS[STANDALONE]}; then
comps=''
elif __contains_word "$verb" ${VERBS[IMAGE]}; then
if [[ $n == 1 ]]; then
comps=$( compgen -A file -- "$cur" )
compopt -o filenames
else
comps=''
fi
elif __contains_word "$verb" ${VERBS[IMAGES]}; then
comps=$( compgen -A file -- "$cur" )
compopt -o filenames
elif __contains_word "$verb" ${VERBS[IMAGE_WITH_BOOL]}; then
if [[ $n == 1 ]]; then
comps=$( compgen -A file -- "$cur" )
compopt -o filenames
elif [[ $n == 2 ]]; then
comps='yes no'
else
comps=''
fi
fi
COMPREPLY=( $(compgen -o filenames -W '$comps' -- "$cur") )
return 0
}
complete -F _portablectl portablectl