Launch-editor - Launch your favourite editor in a saved directory, or type a new directory to be saved

launch-editor.bash

#!/bin/bash

# Requires Python3 and `tput` from ncurses-bin
launch-editor () {
  EDITOR="pulsar"
  
  history_file="$HOME/.launch-editor_history"

  have_history=0
  number=1
  tput setaf 4
  tput bold
  echo -en "\n- Launch $EDITOR "
  tput smul
  echo -e "where?\n"
  tput sgr0

  # file exists regardless of type
  if [ -e "$history_file" ] ; then
    have_history=1
    removing=0
    while IFS= read -r line; do
      tput smul
      tput setaf 2
      tput bold
      if [ -d "$line" ] ; then
        echo -n "$number"
        tput rmul
        tput setaf 6
        echo -e "\t$line"
      else
        echo -e "\e[9m\e[1;30m$number\e[0m\t\e[9m\e[1;30m$line\e[0m (will be removed)"
        to_remove[removing]="$line"
        (( removing+=1 ))
      fi
      tput sgr0


      dir_array[number]="$line"
      (( number+=1 ))
    done < "$history_file"
  else
    true
  fi

  if [ $have_history -eq 1 ] ; then
    prompt="Type or select \e[1;32m\e[4mdirectory #\e[0m\e[1;35m: "
  else
    prompt="Type directory: "
  fi

  good_dir=0
  while [ $good_dir -ne 1 ] ; do
    tput bold
    tput setaf 5

    echo -en "\n$prompt"
    tput setaf 3
    read -re ip
    tput sgr0

    selected_dir=""

    case "$ip" in
      '') continue ;;
      *[!0-9]*) selected_dir="$ip" ;;
      *) selected_dir=${dir_array[$ip]} ;;
    esac

    selected_dir="${selected_dir/#\~/$HOME}"
    selected_dir=$(realpath "$selected_dir")

    if [ -d "$selected_dir" ]; then
      # echo "$selected_dir"
      good_dir=1
    else
      echo -e "Error: not a directory: $ip\n"
    fi
  done

  awk -v line="$selected_dir" 'FNR==NR && line==$0{f=1; exit}
                               END{if (!f) print line >> FILENAME}' "$history_file"

  if (( ${#to_remove[@]} ))
  then
    join "$(echo -e "\x02")" "${to_remove[@]}" |
    python3 -c "from pathlib import Path; from codecs import escape_decode
  hist = Path('$history_file').read_text().rstrip().split('\n')
  # print(repr(hist))
  i_remove = input()
  remove = escape_decode(bytes(i_remove, 'utf-8'))[0].decode('utf-8').split('\x02')
  # print(repr(remove))
  if not remove:
    print('\n'.join(hist))
  for hist_line in hist:
    # print('hist line is', hist_line)
    if hist_line not in remove:
        print(hist_line)" > "$history_file.fix"

    command rm "$history_file"
    command mv "$history_file.fix" "$history_file"
  fi

  tput bold
  tput setaf 4
  echo -ne "\nFinal: "
  tput setaf 3
  echo "$selected_dir"
  tput sgr0

  cd "$selected_dir" && "$EDITOR" .
}