add bash completion for systemd-detect-virt

(cherry picked from commit 3bfe58cbd4)

Makefile.am

@@ -345,6 +345,7 @@ dist_bashcompletion_DATA = \
 	shell-completion/bash/systemd-cgls \
 	shell-completion/bash/systemd-cgtop \
 	shell-completion/bash/systemd-delta \
+	shell-completion/bash/systemd-detect-virt \
 	shell-completion/bash/systemd-nspawn \
 	shell-completion/bash/systemd-run \
 	shell-completion/bash/udevadm \

shell-completion/bash/systemd-detect-virt

@@ -0,0 +1,40 @@
+# systemd-detect-virt(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
+}
+
+_systemd_detect_virt() {
+        local cur=${COMP_WORDS[COMP_CWORD]} prev=${COMP_WORDS[COMP_CWORD-1]}
+        local i verb comps
+
+        local -A OPTS=(
+               [STANDALONE]='-h --help --version -c --container -v --vm -q --quiet'
+        )
+
+        _init_completion || return
+
+        COMPREPLY=( $(compgen -W '${OPTS[*]}' -- "$cur") )
+}
+
+complete -F _systemd_detect_virt systemd-detect-virt