TODO_DIR="$HOME/.todos"
 
 if [[ ! -d "$TODO_DIR" ]]; then
   mkdir -p "$TODO_DIR"/{shells,archive}
 fi
 
 ds() {
   local task
   if [[ $# > 0 ]]; then
     task="$@"
   else
     read -r  task\?'What doing? '
   fi
   printf '%s' "$task" > "$TODO_DIR/shells/$$.txt"
 }
 
 td() {
   local task
   if [[ $# > 0 ]]; then
     task="$@"
   else
     read -r  task\?'What doing? '
   fi
   printf '%s' "$task" > "$TODO_DIR/current"
 }
 
 pop-todo() {
   local shell_file day_file
   shell_file="$TODO_DIR/shells/$$.txt"
   day_file="$TODO_DIR/current"
 
   if [[ -f "$shell_file" ]]; then
     mv "$shell_file" "$TODO_DIR/archive/$$.$(date +"%Y-%m-%d--%H-%M-%S")"
     return
   fi
 
   if [[ -f "$day_file" ]]; then
     mv "$day_file" "$TODO_DIR/archive/current.$(date +"%Y-%m-%d--%H-%M-%S")"
     return
   fi
 }
 
 doing() {
   local shell_file day_file
   shell_file="$TODO_DIR/shells/$$.txt"
   day_file="$TODO_DIR/current"
 
   if [[ -f "$shell_file" || -f "$day_file" ]]; then
     printf '\033[0;33mTODO: \033[0m'
   fi
 
   if [[ -f "$shell_file" ]]; then
     cat "$shell_file" | tr '\n' ' '
   elif [[ -f "$day_file" ]]; then
     cat "$day_file" | tr '\n' ' '
   fi
 
   if [[ -f "$shell_file" || -f "$day_file" ]]; then
     echo
   fi
 }