add bash completion support

Makefile

@@ -2,12 +2,20 @@ NAME=pulseaudio-tcp
 PREFIX=/usr
 BINDIR=$(PREFIX)/bin
 APPDIR=$(PREFIX)/share/applications
+COMPLETIONDIR=$(PREFIX)/share/bash-completion/completions
 DESTDIR=
 
-.PHONY: all install-bin install-desktop install
+.PHONY: all install-bash install-bin install-desktop install
 
 all:
 
+install-bash: $(NAME).bash_completion
+	@install -d -m 755 "$(DESTDIR)$(COMPLETIONDIR)"
+	@install -m 644 \
+		"$(NAME).bash_completion" \
+		"$(DESTDIR)$(COMPLETIONDIR)/$(NAME)"
+	@echo "INFO: Bourne Again Shell completion for $(NAME) was installed to $(COMPLETIONDIR)"
+
 install-bin: $(NAME)
 	@install -d -m 755 "$(DESTDIR)$(BINDIR)"
 	@install -m 755 "$(NAME)" "$(DESTDIR)$(BINDIR)"/"$(NAME)"
@@ -24,7 +32,7 @@ install-desktop: $(NAME).desktop.in
 			> "$(DESTDIR)$(APPDIR)"/"$(NAME)".desktop
 	@echo "INFO: $(NAME).desktop was installed to $(APPDIR)"
 
-install: install-bin install-desktop
+install: install-bash install-bin install-desktop
 	@if test -z "$(DESTDIR)" ; then \
 		if test -n "$$(which update-desktop-database)" ; then \
 			update-desktop-database "$(APPDIR)" ; \

pulseaudio-tcp.bash_completion

@@ -0,0 +1,22 @@
+_pulseaudio_tcp_completions() {
+  local cur options commands delete
+
+  cur=${COMP_WORDS[COMP_CWORD]}
+  options=( "--debug" "--help" "--nogui" )
+  commands=( "start" "stop" "status" "setup" "restart" )
+
+  for delete in "${COMP_WORDS[@]::${#COMP_WORDS[@]}-1}" ; do
+    options=("${options[@]/$delete}")
+    commands=("${commands[@]/$delete}")
+  done
+
+  COMPREPLY=()
+
+  case "$cur" in
+    '') mapfile -t COMPREPLY < <(compgen -W "${options[*]} ${commands[*]}"  -- "$cur") ;;
+    -*) mapfile -t COMPREPLY < <(compgen -W "${options[*]}" -- "$cur") ;;
+    [^-]*) mapfile -t COMPREPLY < <(compgen -W "${commands[*]}" -- "$cur") ;;
+  esac
+
+  return 0
+} && complete -F _pulseaudio_tcp_completions pulseaudio-tcp