custom prompt I don't use anymore because I prefer [startship](https://github.com/starship/starship)

custom_prompt.sh

function custom_prompt {
  # https://tldp.org/HOWTO/Bash-Prompt-HOWTO/bash-prompt-escape-sequences.html
  # \e == \033

  # Select Graphic Rendition parameters
  # 30–37 selected the foreground color
  # 40–47 selected the background color

  # prompt
   FMT_RESET="\[\e[0m\]"
    FMT_BOLD="\[\e[1m\]"
     FMT_DIM="\[\e[2m\]"
  FMT_NORMAL="\[\e[22m\]"

    FG_BLACK="\[\e[30m\]"
      FG_RED="\[\e[31m\]"
    FG_GREEN="\[\e[32m\]"
   FG_YELLOW="\[\e[33m\]"
     FG_BLUE="\[\e[34m\]"
  FG_MAGENTA="\[\e[35m\]"
     FG_CYAN="\[\e[36m\]"
    FG_WHITE="\[\e[37m\]"

    BG_BLACK="\[\e[40m\]"
      BG_RED="\[\e[41m\]"
    BG_GREEN="\[\e[42m\]"
   BG_YELLOW="\[\e[43m\]"
     BG_BLUE="\[\e[44m\]"
  BG_MAGENTA="\[\e[45m\]"
     BG_CYAN="\[\e[46m\]"
    BG_WHITE="\[\e[47m\]"

  FG_BRIGHT_WHITE="\[\e[97m\]"

  PS1="\n "
  PS1+="${FG_BLUE}╭─" # begin arrow to prompt
  PS1+="${FMT_RESET}"
  PS1+="${FG_CYAN}" # begin USERNAME container
  PS1+="${BG_CYAN} "
  PS1+="${BG_CYAN}👋" # print OS icon

  PS1+="${BG_CYAN} "
  # DT="\D{%Y-%m-%d} \t\[$(tput sgr0)\]"
  DT="\t\[$(tput sgr0)\]"
  PS1+="${BG_CYAN}${FG_BLACK}${DT}"
  PS1+="${FMT_NORMAL}"

  # not reliable enough
  # https://stackoverflow.com/q/1871549
  if [ ! -z "$VIRTUAL_ENV" -a "$VIRTUAL_ENV" != " " ]; then
    PS1+="${BG_CYAN} "
    PS1+="${BG_CYAN}${FG_BRIGHT_WHITE}($(basename ${VIRTUAL_ENV}))"
    PS1+="${FMT_NORMAL}"
  fi

  if [ ! -z "$VIRTUAL_ENV" -a "$VIRTUAL_ENV" != " " ]
  then
    PYTHON_VERSION="[🐍 `python -c "print(__import__('sys').version.split(' ')[0])"`]"
    PS1+="${BG_CYAN} "
    PS1+="${BG_CYAN}${FG_BRIGHT_WHITE}${PYTHON_VERSION}"
    PS1+="${FMT_NORMAL}"
  elif command -v pyenv 1>/dev/null 2>&1
  then
    if [[ `pyenv version-name` != "system" ]]
    then
      PYTHON_VERSION="[🐍 `pyenv version-name`]"
      PS1+="${BG_CYAN} "
      PS1+="${BG_CYAN}${FG_BRIGHT_WHITE}${PYTHON_VERSION}"
      PS1+="${FMT_NORMAL}"
    fi
  fi

  PS1+="${BG_CYAN} "

  PS1+="${FG_CYAN}${BG_MAGENTA}" # begin USERNAME container
  PS1+="${BG_MAGENTA} "
  PS1+="${FG_BRIGHT_WHITE}${FMT_BOLD}\u@\H" # print username
  PS1+="${FMT_NORMAL}"
  PS1+="${BG_MAGENTA} " # end USERNAME container

  PS1+="${FG_MAGENTA}${BG_BLUE}" # begin DIRECTORY container
  PS1+="${BG_BLUE} "
  PS1+="${FG_WHITE}\w" # print directory
  PS1+="${FMT_NORMAL}"
  PS1+="${BG_BLUE} " # end DIRECTORY container

  PS1+="${FG_BLUE}${BG_CYAN}" # begin FILES container
  PS1+="${BG_CYAN} "
  PS1+="${FG_BLACK}"
  PS1+=" \$(find . -mindepth 1 -maxdepth 1 -type d | wc -l) " # print number of folders
  PS1+=" \$(find . -mindepth 1 -maxdepth 1 -type f | wc -l) " # print number of files
  PS1+=" \$(find . -mindepth 1 -maxdepth 1 -type l | wc -l) " # print number of symlinks
  PS1+="${FMT_RESET}${FG_CYAN}"

  BRANCH=`git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/\1/'`
  if [ ! "${BRANCH}" == "" ]
  then
    STAT=`parse_git_dirty`
    PS1+="${BG_GREEN}"
    PS1+="${BG_GREEN} "
    PS1+="${BG_GREEN}${FG_BLACK}"
    PS1+="${FMT_NORMAL}"
    PS1+="${BG_GREEN} "
    PS1+="${BG_GREEN}${FG_BLACK}${BRANCH}${STAT}"
    PS1+="${FMT_RESET}"
    PS1+="${FG_GREEN}"
  fi

  PS1+="\n " # end last container (either FILES or BRANCH)
  PS1+="${FG_BLUE}╰ " # end arrow to prompt
  PS1+="${FG_CYAN}\\$ " # print prompt
  PS1+="${FMT_RESET}"
}


# time (hour, minute, seconds)
# if virtual env activated
# python version
# path of working directory
# git branch (and states)
# elapsed time last command

PROMPT_COMMAND=custom_prompt

parse_git_dirty.sh

# get current status of git repo
function parse_git_dirty {
  status=`git status 2>&1 | tee`
      dirty=`echo -n "${status}" 2> /dev/null | grep "modified:"               &> /dev/null; echo "$?"`
  untracked=`echo -n "${status}" 2> /dev/null | grep "Untracked files"         &> /dev/null; echo "$?"`
      ahead=`echo -n "${status}" 2> /dev/null | grep "Your branch is ahead of" &> /dev/null; echo "$?"`
    newfile=`echo -n "${status}" 2> /dev/null | grep "new file:"               &> /dev/null; echo "$?"`
    renamed=`echo -n "${status}" 2> /dev/null | grep "renamed:"                &> /dev/null; echo "$?"`
    deleted=`echo -n "${status}" 2> /dev/null | grep "deleted:"                &> /dev/null; echo "$?"`
  bits=''
  if [ "${renamed}" == "0" ]; then
    bits=">${bits}"
  fi
  if [ "${ahead}" == "0" ]; then
    bits="*${bits}"
  fi
  if [ "${newfile}" == "0" ]; then
    bits="+${bits}"
  fi
  if [ "${untracked}" == "0" ]; then
    bits="?${bits}"
  fi
  if [ "${deleted}" == "0" ]; then
    bits="x${bits}"
  fi
  if [ "${dirty}" == "0" ]; then
    bits="!${bits}"
  fi
  if [ ! "${bits}" == "" ]; then
    echo " ${bits}"
  else
    echo ""
  fi
}

# don't remember where I call to PROMPT_COMMAND or overwrite PS1