contrib: bash: completion.bash: add completion for lsbtr

Makefile

@@ -71,6 +71,9 @@ install-completion:
 	@echo 'installing bash completion...'
 	install -d -m 755 "$(DESTDIR)$(BASHCOMPDIR)"
 	install -p -m 644 contrib/bash/completion.bash "$(DESTDIR)$(BASHCOMPDIR)/$(BIN)"
+	for name in $(BIN_LINKS); do \
+		ln -s -n -f $(BIN) "$(DESTDIR)$(BASHCOMPDIR)/$$name"; \
+	done
 
 install-systemd:
 	@echo 'installing systemd service units...'

contrib/bash/completion.bash

@@ -106,4 +106,32 @@ _btrbk()
   fi
 } && complete -F _btrbk btrbk
 
+_lsbtr()
+{
+  local cur prev words cword split
+  _init_completion -s || return
+
+  case "$prev" in
+    '-c' | '--config')
+      _filedir
+      return
+      ;;
+    '--override')
+      return
+      ;;
+  esac
+
+  $split && return
+
+  if [[ $cur == -* ]]; then
+    COMPREPLY=($(compgen -W '$(_parse_help "$1")' -- "$cur"))
+    [[ $COMPREPLY == *= ]] && compopt -o nospace
+    return
+  else
+    # <path>|<url>...
+    _filedir -d
+    return
+  fi
+} && complete -F _lsbtr lsbtr
+
 # ex: filetype=bash