bash red hat prompt on Fedora 34

prompt_include.sh

function _shell_char {
  if [ "$_EXIT_CODE" -eq 0 ]; then
    #printf "%s" "$"
    printf "$RED$shellchar$RESET"
  else
    # printf "$RED$FancyX$RESET"
    printf "$RED$collision$RESET"
  fi
}

function _generated_ps1 {
  local _EXIT_CODE=$? # must be called first

  # using \001 and \002 instead of \[ \] here
  # https://unix.stackexchange.com/a/447520/14907
  local RED="\001\033[0;31m\002"
  local RESET="\001\e[0m\002"

  # see https://unix.stackexchange.com/a/468983/14907
  local FancyX="\001\342\002\234\227"
  local Checkmark="\001\342\002\234\223"
  # such unicodes see https://stackoverflow.com/a/602924/520567
  local lightning='\001\xe2\002\x9a\xa1'

  local collision='\001\xf0\x9f\002\x92\xa5'
  local shellchar='\001\xf0\x9f\002\x90\x9a'

  printf "$RED%s${RESET}%s" "$(__git_ps1)" "$(_shell_char)"
}

new_line_ps1() {
  local _EXIT_CODE=$? # must be called first
  local LIGHT_YELLOW="\001\033[1;93m\002"
  local     RESET="\001\e[0m\002"
  local _ y x _

  # https://github.com/dylanaraps/pure-bash-bible#get-the-current-cursor-position
  IFS='[;' read -p $'\e[6n' -d R -rs _ y x _
  if [[ "$x" != 1 ]]; then
    printf "\n${LIGHT_YELLOW}^^ no newline at end of output ^^\n${RESET}"
  fi
  return $_EXIT_CODE
}

# Fancy prompt function (from nhr)
function proml {
  GIT_PS1_SHOWUPSTREAM="auto"
  GIT_PS1_SHOWUNTRACKEDFILES=1
  GIT_PS1_SHOWDIRTYSTATE=1
  # GIT_PS1_STATESEPARATOR=""
  GIT_PS1_HIDE_IF_PWD_IGNORED=1
  # from git package
  if [ -f /usr/share/git-core/contrib/completion/git-prompt.sh ] ; then
    . /usr/share/git-core/contrib/completion/git-prompt.sh
  elif [ -f /usr/share/git/git-prompt.sh ] ; then
    . /usr/share/git/git-prompt.sh
  fi

  local        BLUE="\[\033[0;34m\]"
  local  LIGHT_BLUE="\[\033[0;36m\]"
  local         RED="\[\033[0;31m\]"
  local   LIGHT_RED="\[\033[1;31m\]"
  local       GREEN="\[\033[0;32m\]"
  local LIGHT_GREEN="\[\033[1;32m\]"
  local       WHITE="\[\033[1;37m\]"
  local  LIGHT_GRAY="\[\033[0;37m\]"
  local       BLACK="\[\033[0;30m\]"
  local       RESET="\[\e[0m\]"
  # this is 🎩︎ hat in UTF, use `printf 🎩︎| hexdump -C` or `printf 🎩︎| od -t x1`
  # local         HAT=`printf '\001\xf0\x9f\x8e\xa9\002\xef\xb8\x8e\x0a'`
  local         HAT="\[🎩︎\]\e\e"

  case $TERM in
    xterm*)
    TITLEBAR='\[\033]0;\u@\h:\w\007\]'
    ;;
    *)
    TITLEBAR=""
    ;;
  esac

  # Standard Prompt
  #PS1="$LIGHT_BLUE[$BLUE\u $GREEN\W$LIGHT_BLUE] $RED\$(parse_git_branch)${RESET} $ "

  # Red Hat Prompt
  PS1="\$(new_line_ps1)$LIGHT_BLUE[$RED$HAT$BLUE\u $GREEN\W$LIGHT_BLUE]\$(_generated_ps1) "
  PS2='> '
  PS4='+ '
}

# Call the fancy prompt function
proml

Credits to @thrasr who provided original version. I only made it omit empty spaces before $ in case we are outside a git tree.

There's also __git_ps1 but you need to enable it. In my ~/.bashrc I have:

if [ -f /usr/share/git-core/contrib/completion/git-prompt.sh ] ; then
    . /usr/share/git-core/contrib/completion/git-prompt.sh
elif [ -f /usr/share/git/git-prompt.sh ] ; then
    . /usr/share/git/git-prompt.sh
fi

The latter one is for a non-RH distro.

I have updated the gist to use the shell (see below) unicode character instead of $ as well report non-zero command exit status by changing that character to collision (see below). They take up 2 character spaces but with them I remove needless empty space after git info. These characters can be changed in _shell_char function if desired.

Also I implemented the suggestion of @ekohl to use git-prompt.sh. I'm not sure it is faster than my implementation of _parse_git_branch in revision 2 but it presents rich options.

Update: Added handling of commands without new line at end of output as another source of prompt corruption.

Let me show you a screenshot with my prompt:

Really funny!! And nice redhat logo!

Cool!