systemd-resolve: initial shell completion

v2:
- use /sys/class/net to list interfaces,
  also copy the same code to systemd-nspawn
v3:
- do not propose "any" twice for --type

1 files changed, 64 insertions, 0 deletions

diff --git a/shell-completion/bash/systemd-resolve b/shell-completion/bash/systemd-resolve
new file mode 100644
index 0000000000..0c501c9405
--- /dev/null
+++ b/shell-completion/bash/systemd-resolve
@@ -0,0 +1,64 @@
+# systemd-resolve(1) completion                             -*- shell-script -*-
+#
+# This file is part of systemd.
+#
+# Copyright 2016 Zbigniew Jędrzejewski-Szmek
+#
+# 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_interfaces(){
+        { cd /sys/class/net && echo *; } | \
+        while read -d' ' -r name; do
+                [[ "$name" != "lo" ]] && echo "$name"
+        done
+}
+
+_systemd-resolve() {
+        local i comps
+        local cur=${COMP_WORDS[COMP_CWORD]} prev=${COMP_WORDS[COMP_CWORD-1]}
+        local -A OPTS=(
+               [STANDALONE]='-h --help --version -4 -6
+                             --service --openpgp --tlsa --statistics --reset-statistics
+                             --service-address=no --service-txt=no
+                             --cname=no --search=no --legend=no'
+                      [ARG]='-i --interface -p --protocol -t --type -c --class'
+        )
+
+        if __contains_word "$prev" ${OPTS[ARG]}; then
+                case $prev in
+                        --interface|-i)
+                                comps=$( __get_interfaces )
+                                ;;
+                        --protocol|-p|--type|-t|--class|-c)
+                                comps=$( systemd-resolve --legend=no "$prev" help; echo help )
+                                ;;
+                esac
+                COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
+                return 0
+        fi
+
+        if [[ "$cur" = -* ]]; then
+                COMPREPLY=( $(compgen -W '${OPTS[*]}' -- "$cur") )
+                return 0
+        fi
+}
+
+complete -F _systemd-resolve systemd-resolve