shell completion: add bash completion for importctl

Signed-off-by: Arthur Zamarin <arthurzam@gentoo.org>

diff --git a/shell-completion/bash/importctl b/shell-completion/bash/importctl
new file mode 100644 (file)
index 0000000..d8187d0
--- /dev/null
+++ b/shell-completion/bash/importctl
@@ -0,0 +1,125 @@
+# shellcheck shell=bash
+# importctl(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-images --full --no-legend --no-pager 2>/dev/null; machinectl list --full --max-addresses=0 --no-legend --no-pager 2>/dev/null; echo ".host"; } | \
+       { while read a b; do echo " $a"; done; } | \
+        sort -u
+}
+
+_importctl() {
+    local cur=${COMP_WORDS[COMP_CWORD]} prev=${COMP_WORDS[COMP_CWORD-1]} words cword
+    local i verb comps
+
+    local -A OPTS=(
+        [STANDALONE]='--force -h --help -j -N --no-ask-password --no-legend --no-pager -q --quiet --read-only
+                      --version -m -P -S -C'
+        [ARG]='--host -H -M --machine --json --verify --format --class --keep-download'
+    )
+
+    local -A VERBS=(
+        [STANDALONE]='pull-tar pull-raw list-transfers cancel-transfer list-images'
+        [FILE]='import-tar import-raw'
+        [FILE2]='export-tar export-raw'
+        [DIR]='import-fs'
+    )
+
+    _init_completion || return
+
+    for ((i=0; i <= COMP_CWORD; i++)); do
+        if __contains_word "${COMP_WORDS[i]}" ${VERBS[*]} &&
+                ! __contains_word "${COMP_WORDS[i-1]}" ${OPTS[ARG]}; then
+            verb=${COMP_WORDS[i]}
+            break
+        fi
+    done
+
+    if __contains_word "$prev" ${OPTS[ARG]}; then
+        case $prev in
+            --host|-H)
+                comps=$(compgen -A hostname)
+                ;;
+            --machine|-M)
+                comps=$( __get_machines )
+                ;;
+            --json)
+                comps='pretty short off'
+                ;;
+            --verify)
+                comps='no checksum signature'
+                ;;
+            --format)
+                comps='uncompressed xz gzip bzip2'
+                ;;
+            --class)
+                comps='machine portable sysext confext'
+                ;;
+            --keep-download)
+                comps='yes no'
+                ;;
+        esac
+        COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
+        return 0
+    fi
+
+    if [[ "$cur" = -* ]]; then
+        COMPREPLY=( $(compgen -W '${OPTS[*]}' -- "$cur") )
+        return 0
+    fi
+
+    if [[ -z ${verb-} ]]; then
+        comps=${VERBS[*]}
+    elif __contains_word "$verb" ${VERBS[STANDALONE]}; then
+        comps=''
+    elif __contains_word "$verb" ${VERBS[DIR]}; then
+        if (( COMP_CWORD == i + 1 )); then # first argument after verb
+            comps=$(compgen -d -- "$cur")
+            compopt -o dirnames
+        else
+            comps=''
+        fi
+    elif __contains_word "$verb" ${VERBS[FILE]}; then
+        if (( COMP_CWORD == i + 1 )); then # first argument after verb
+            comps=$(compgen -f -- "$cur")
+            compopt -o filenames
+        else
+            comps=''
+        fi
+    elif __contains_word "$verb" ${VERBS[FILE2]}; then
+        if (( COMP_CWORD == i + 2 )); then # second argument after verb
+            comps=$(compgen -f -- "$cur")
+            compopt -o filenames
+        else
+            comps=''
+        fi
+    fi
+
+    COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
+    return 0
+}
+
+complete -F _importctl importctl