_projects() {
  local cur prev opts
  COMPREPLY=()
  cur="${COMP_WORDS[COMP_CWORD]}"
  prev="${COMP_WORDS[COMP_CWORD-1]}"
  opts=$(todolist list by p | cut -d ' ' -f 2  | grep -E "^[^\\[]+$" | sed -e 's/^/+/g')
  if [[ ${cur} == +* ]] ; then
    COMPREPLY=( $(compgen -W "${opts}" + ${cur}) )
    return 0
  fi
}

complete -F _projects todolist