shell-completion: add shell completions for systemd-hwdb

Co-developed-by: Claude <claude@anthropic.com>

shell-completion/bash/meson.build

@@ -46,6 +46,7 @@ foreach item : [
         ['systemd-delta',       ''],
         ['systemd-detect-virt', ''],
         ['systemd-dissect',     'HAVE_BLKID'],
+        ['systemd-hwdb',        'ENABLE_HWDB'],
         ['systemd-id128',       ''],
         ['systemd-nspawn',      'ENABLE_NSPAWN'],
         ['systemd-path',        ''],

shell-completion/bash/systemd-hwdb

@@ -0,0 +1,76 @@
+# shellcheck shell=bash
+# systemd-hwdb(8) 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
+}
+
+_systemd_hwdb() {
+    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 -s --strict --usr'
+        [ARG]='-r --root'
+    )
+
+    local -A VERBS=(
+        [STANDALONE]='update'
+        [ARG]='query'
+    )
+
+    _init_completion || return
+
+    if __contains_word "$prev" ${OPTS[ARG]}; then
+        case $prev in
+            --root|-r)
+                comps=$(compgen -A directory -- "$cur")
+                compopt -o dirnames
+                ;;
+        esac
+        COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
+        return 0
+    fi
+
+    for ((i=0; i < COMP_CWORD; i++)); do
+        if __contains_word "${COMP_WORDS[i]}" ${VERBS[*]} &&
+                ! __contains_word "${COMP_WORDS[i-1]}" ${OPTS[ARG]}; then
+            verb=${COMP_WORDS[i]}
+            break
+        fi
+    done
+
+    if [[ -z ${verb-} ]]; then
+        COMPREPLY=( $(compgen -W '${OPTS[*]} ${VERBS[*]}' -- "$cur") )
+        return 0
+    fi
+
+    if [[ "$cur" = -* ]]; then
+        COMPREPLY=( $(compgen -W '${OPTS[*]}' -- "$cur") )
+        return 0
+    fi
+
+    COMPREPLY=( $(compgen -W '${comps-}' -- "$cur") )
+    return 0
+}
+
+complete -F _systemd_hwdb systemd-hwdb