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systemd/shell-completion/bash/systemd-cgls
Zbigniew Jędrzejewski-Szmek 4e9183059a shell-completion/zsh: silence error when machinectl is not installed
This fixes a few unrelated issues:
- when ENABLE_MACHINED is false, machinectl is not installed, but _sd_machines
  is still used in a few places that want to complete -M and such.
  Also, bash completion calls machinectl in various places.
  Make missing machinectl mean "no machines" in this case, so
  that no error is generated in the callers.
- machinectl list --full would print multiple lines of output per machine,
  breaking grep, issue introduced in e2268fa437.
  Using --max-addresses=1 would fix the issue, but let's use
  --max-addresses=0 because we now can.
- the lists used in various places were slightly different for no good reason.
- don't use a subshell if not necessary.

The code for bash still uses the same combined list of images and running
machines for various commands. The zsh code uses images for start/clone, and
running machines for the rest. Maybe something to fix in the future.

Replaces #25048.
2022-10-20 09:58:00 +02:00

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# systemd-cgls(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 <https://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 --max-addresses=0 --no-legend --no-pager 2>/dev/null; echo ".host"; } | \
{ while read a b; do echo " $a"; done; } | \
sort -u
}
__get_units_have_cgroup() {
systemctl $1 --full --no-legend --no-pager --plain list-units | {
while read -r a b c d; do
[[ $c == "active" && ${a##*.} =~ (service|socket|mount|swap|slice|scope) ]] && echo " $a"
done
};
}
_systemd_cgls() {
local cur=${COMP_WORDS[COMP_CWORD]} prev=${COMP_WORDS[COMP_CWORD-1]} words cword
local i verb comps
local -A OPTS=(
[STANDALONE]='-h --help --version --all -l --full -k --no-pager --xattr=no --cgroup-id=no'
[ARG]='-M --machine -u --unit --user-unit'
)
_init_completion || return
if __contains_word "$prev" ${OPTS[ARG]}; then
case $prev in
--machine|-M)
comps=$( __get_machines )
;;
--unit|-u)
comps=$( __get_units_have_cgroup --system )
;;
--user-unit)
comps=$( __get_units_have_cgroup --user )
;;
esac
COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
return 0
fi
COMPREPLY=( $(compgen -W '${OPTS[*]}' -- "$cur") )
}
complete -F _systemd_cgls systemd-cgls