Funny bash prompt with simple git support (display branch name)

.bashrc

function __show_git_repo_branch {
  AFTER_HOOK="$1"

  local CURRENT_BRANCH=$(git branch 2>/dev/null| grep -e '^*' | cut -b 3-)

  if [ -n "${CURRENT_BRANCH}" ]; then

    local IS_MODIFIED=$(git status --short | wc -l)

    PS1+="${__GIT_COLOR}${__GIT_START_CHAR}${__GIT_BRANCH_COLOR}${CURRENT_BRANCH}"

    if [ "${IS_MODIFIED}" -gt 0 ]; then
        PS1+="${__GIT_MODIFIED_COLOR}${__GIT_MODIFIED_CHAR}$IS_MODIFIED"
    fi

    PS1+="${__GIT_COLOR}${__GIT_END_CHAR}"

    if [ -n "${AFTER_HOOK}" ]; then
      ${AFTER_HOOK}
    fi
  fi
}

function __show_username {
  PS1+="${__USERNAME_COLOR}\u"
}

function __show_exit_code {
    if [ $__LAST_EXIT_CODE != 0 ]; then
        PS1+="${__EXIT_CODE_FAIL_COLOR}${__EXIT_CODE_FAIL_CHAR}${__LAST_EXIT_CODE}" # red x with error status
    else
        PS1+="${__EXIT_CODE_SUCCESSFULY_COLOR}${__EXIT_CODE_SUCCESSFULY_CHAR}" # green tick
    fi
}

function __show_hour {
  PS1+="${__HOUR_COLOR}\A" # date, e.g. 17:00
}

function __show_hostname {
  PS1+="${__HOSTNAME_COLOR}\h"
}

function __show_prompt {
  if [ $(id -u) -eq 0 ]; then
    PS1+="${__PROMPT_ROOT_USER_COLOR}${__PROMPT_ROOT_USER_CHAR}${__COMMAND_LINE_COLOR}"
  else
    PS1+="${__PROMPT_NORMAL_USER_COLOR}${__PROMPT_NORMAL_USER_CHAR}${__COMMAND_LINE_COLOR}"
  fi
}

function __show_workdir {
  PS1+="${__WORKDING_DIR_COLOR}\w" # working directory
}

function __show_separator {
  PS1+="${__SEPARATOR_DEFAULT_COLOR}${__SEPARATOR_DEFAULT_CHAR}"
}

__vte_urlencode() (
  # This is important to make sure string manipulation is handled
  # byte-by-byte.
  LC_ALL=C
  str="$1"
  while [ -n "$str" ]; do
    safe="${str%%[!a-zA-Z0-9/:_\.\-\!\'\(\)~]*}"
    printf "%s" "$safe"
    str="${str#"$safe"}"
    if [ -n "$str" ]; then
      printf "%%%02X" "'$str"
      str="${str#?}"
    fi
  done
)

__vte_osc7 () {
  printf "\033]7;file://%s%s\007" "${HOSTNAME:-}" "$(__vte_urlencode "${PWD}")"
}

function __set_prompt_cool1 {
  __LAST_EXIT_CODE="$?" # MUST come first
  
  # Not bash or zsh?
  [ -n "$BASH_VERSION" ] || return 0

  # Not an interactive shell?
  [[ $- == *i* ]] || return 0

  # Not running under vte?
  [ "${VTE_VERSION:-0}" -ge 3405 ] || return 0
  
  __GIT_BRANCH_COLOR="\[\e[100;97m\]"
  __GIT_COLOR="\[\e[94m\]"
  __GIT_MODIFIED_COLOR="\[\e[31m\]"
  __USERNAME_COLOR="\[\e[97m\]"
  __EXIT_CODE_SUCCESSFULY_COLOR="\[\e[42m\]"
  __EXIT_CODE_FAIL_COLOR="\[\e[41m\]"
  __HOUR_COLOR="\[\e[100;93m\]"
  __HOSTNAME_COLOR="\[\e[32m\]"
  __PROMPT_NORMAL_USER_COLOR="\[\e[m\]"
  __PROMPT_ROOT_USER_COLOR="\[\e[m\]\[\e[31m\]"
  __WORKDING_DIR_COLOR="\[\e[1;94m\]"
  __COMMAND_LINE_COLOR="\[\e[m\]"
  __SEPARATOR_DEFAULT_COLOR="\[\e[100;93m\]"

  __EXIT_CODE_SUCCESSFULY_CHAR=" ✔ "
  __EXIT_CODE_FAIL_CHAR=" ✘ "
  __PROMPT_NORMAL_USER_CHAR="▶ "
  __PROMPT_ROOT_USER_CHAR="▷ "
  __GIT_START_CHAR="[ "
  __GIT_END_CHAR=" ]"
  __GIT_MODIFIED_CHAR="*"
  __SEPARATOR_DEFAULT_CHAR=" "

  PS1="" # "\[\e[32m\]test\[\e[m\] "
  __show_exit_code
  __show_separator
  __show_hour
  __show_separator
  __show_username
  __show_separator
  __show_workdir
  __show_separator
  __show_git_repo_branch __show_separator
  __show_prompt
  
  local pwd='~';
  [ "$PWD" != "$HOME" ] && pwd=${PWD/#$HOME\//\~\/};
  printf "$(__vte_osc7)"
}

PROMPT_COMMAND=__set_prompt_cool1