Linux comand line autocomplete

    INDICATORS_DIR=/projects/equities/simulation/indicators

   _daily_indicator_complete() {

       local cur prev words

       cur="${COMP_WORDS[COMP_CWORD]}"

       prev="${COMP_WORDS[COMP_CWORD-1]}"

       words="${COMP_WORDS[*]}"

       # Only activate when command line contains daily_*.py

       [[ "$words" == *daily_*.py* ]] || return

       if [[ "$prev" == "-i" || "$cur" == *,* ]]; then

           local indicators=$(ls "$INDICATORS_DIR"/*.py 2>/dev/null \

               | xargs -n1 basename | sed 's/\.py$//' | sort -u)

           if [[ "$cur" == *,* ]]; then

               local prefix="${cur%,*},"

               local last="${cur##*,}"

               COMPREPLY=( $(compgen -W "$indicators" -- "$last") )

               COMPREPLY=( "${COMPREPLY[@]/#/$prefix}" )

           else

               COMPREPLY=( $(compgen -W "$indicators" -- "$cur") )

           fi

       fi

   }

   complete -o nospace -o default -F _daily_indicator_complete /opt/envs/py38/bin/python