completions: add qdbus completion

(cherry picked from commit c588bd5c5c)

CHANGELOG.rst

@@ -5,7 +5,7 @@ This release of fish introduces the following small enhancements:
 
 - Cursor shaping for Vi mode is enabled by default in tmux, and will be used if the outer terminal is capable (:issue:`8981`).
 - ``printf`` returns a better error when used with arguments interpreted as octal numbers (:issue:`9035`).
-- New completions for ``reflector`` (:issue:`9027`) and improvements to some completions.
+- New completions for ``qdbus`` (:issue:`9031:`) and ``reflector`` (:issue:`9027`), and improvements to some completions.
 
 This release also fixes a number of problems identified in fish 3.5.0.
 

share/completions/qdbus.fish

@@ -0,0 +1,25 @@
+function __fish_qdbus_complete
+    argparse system 'bus=' literal help -- (commandline --cut-at-cursor --tokenize) 2>/dev/null
+    or return
+    if set -q _flag_help
+        return
+    end
+    set -l qdbus_flags $_flag_system
+    if set -q _flag_bus
+        set -a qdbus_flags --bus $_flag_bus
+    end
+    set argc (count $argv)
+    if test $argc -le 3
+        # avoid completion of property value
+        qdbus $qdbus_flags $argv[2] $argv[3] | string replace --regex '^(property(\ read)?|signal|method) ((\{.+\})|([^\ ]+)) ([^\(]+)(\(.+?\))?' '$6\t$1 $3 $7' | string trim
+    end
+end
+
+complete -c qdbus -f
+
+complete -c qdbus -l system -d 'connect to the system bus'
+complete -c qdbus -l bus -r -d 'connect to a custom bus'
+complete -c qdbus -l literal -d 'print replies literally'
+complete -c qdbus -l help -d 'print usage'
+
+complete -c qdbus -a '(__fish_qdbus_complete)'