foo.bash

# ~/.rc/bash_prompt.sh

# Check that we're zsh and real bash not sh bash
case "$(readlink /proc/$$/exe 2>/dev/null)" in
  */bash) ! shopt -oq posix || return;;
  */zsh) ;;
  *) return;;
esac
# Interactive only
[[ $- == *i* ]] || return
# Still have no idea wtf the purpose of this is...
tty -s || return

#
# $PROMPT_COMMAND
#
# Prepend window title of X terminals and other GUI SSH terminal windows,
# i.e. user@host:dir in window/tab title or current command we're running.
# This variable may already be set by your distro, or they might be using PS1= and PS1+= instead.
#
# If not set, you may ptionally specify an expert setting for PROMPT_COMMAND in /etc/sysconfig, /etc/default, or your
# home .config directory which will skip the rest of the tests , but be warned that no error checking is performed.
#
# We prefer vte.sh where applicable (and if installed) before hardcoding PROMPT_COMMAND.
# The filename varies across distros (often appended with its version number), so
# if we can't find the file or libvte is not installed, then we glob for the file,
# otherwise we fallback to a rather sane default.
#
# Note: It's vte.sh's responsibility to 'not load' when it's not applicable, 
#       such as not in side a VTE term, so it does no harm checking/sourcing it.
#
#       vte.sh is usually installed as part of libvte or other distro packages,
#       primarily used in GTK+ terminals as it "improves usage of VTE based terminals".
#       It's vte.sh's responsibility to 'not load' when it's not applicable, 
#       such as not in side a VTE term.
#
#       This description is vague, and varies across distros regarding window title in xterms.
#       For example, openSUSE claims KDE konsole in needs to have "%w" in the "tabs" setting.
#       Debian & Ubuntu comment out their hardcoded PROMPT_COMMAND, claiming that it
#       overwrites xterm -T "title" -n "icontitle".
# 
#       Your miligeage may vary, and you may download vte.sh from it's home at:
#       https://github.com/jessevdk/vte/blob/master/src/vte.sh 
#       The below lines of code check for /etc/local/profile.d/vte.sh if you choose to manually
#       download the script there.
#
#       If for some reason you get a double PS1 prompt or error message ssaying:
#       command not found: __vte_prompt_command then it's best you comment out this code or use 
#       a custom value such as debian's 'echo -ne "\033]0;${USER}@${HOSTNAME}: ${PWD}\007"'
#
if [ -z "$PROMPT_COMMAND" ]; then
  case $TERM in
  xterm*|vte*)
    # check /etc/sysconfig and /etc/default for expert custom file first
    # Debian example: 'echo -ne "\033]0;${USER}@${HOSTNAME}: ${PWD}\007"'
    if [ -e /etc/sysconfig/bash-prompt-xterm ]; then
      PROMPT_COMMAND=/etc/sysconfig/bash-prompt-xterm
    elif [ -e /etc/default/bash-prompt-xterm ]; then
      PROMPT_COMMAND=/etc/default/bash-prompt-xterm
    elif [[ -e "${XDG_CONFIG_HOME:-$HOME/.config}/bash-prompt-xterm" ]]; then
      PROMPT_COMMAND=${XDG_CONFIG_HOME:-$HOME/.config}/bash-prompt-xterm
    elif [ "${VTE_VERSION:-0}" -ge 3405 ]; then
      # If not found, search for vte.sh only if we're in a libvte terminal.
      if [ -r /etc/profile.d/vte.sh ]; then
        . /etc/profile.d/vte.sh && PROMPT_COMMAND="__vte_prompt_command"
      elif [ -r /etc/profile.d/vte-2.91.sh ]; then
        . /etc/profile.d/vte-2.91.sh && PROMPT_COMMAND="__vte_prompt_command"
      elif [ -r /etc/local/profile.d/vte.sh ]; then
        . /etc/local/profile.d/vte.sh && PROMPT_COMMAND="__vte_prompt_command"
      else 
        for v in /etc/profile.d/vte*.sh; do
          if [ -r "$v" ]; then
            . "$v" && PROMPT_COMMAND="__vte_prompt_command"
          else
            # no file found so we fallback to hardcoded default.
            PROMPT_COMMAND='printf "\033]0;%s@%s:%s\007" "${USER}" "${HOSTNAME%%.*}" "${PWD/#$HOME/\~}"'
          fi
        done
        unset v
      fi
    else
      # Else no prompt or vte file found, or not in a libvte compatible terminal,
      # fallback to hardcoded default.
      PROMPT_COMMAND='printf "\033]0;%s@%s:%s\007" "${USER}" "${HOSTNAME%%.*}" "${PWD/#$HOME/\~}"'
    fi
    ;;
  screen*)
    # same thing, check if custom file first, else use fallback.
    if [ -e /etc/sysconfig/bash-prompt-screen ]; then
      PROMPT_COMMAND=/etc/sysconfig/bash-prompt-screen
    elif [ -e /etc/default/bash-prompt-screen ]; then
      PROMPT_COMMAND=/etc/default/bash-prompt-screen
    elif [[ -e "${XDG_CONFIG_HOME:-$HOME/.config}/bash-prompt-screen" ]]; then
      PROMPT_COMMAND=${XDG_CONFIG_HOME:-$HOME/.config}/bash-prompt-screen
    else
      PROMPT_COMMAND='printf "\033k%s@%s:%s\033\\" "${USER}" "${HOSTNAME%%.*}" "${PWD/#$HOME/\~}"'
    fi
    ;;
    #tmux*) # Should we add another case for tmux or byobu? Or do most use screen/xterm termcaps?
    #;;# The catchall below seems to work, might have to add more and unset there.
  *)
    if [ -e /etc/sysconfig/bash-prompt-default ]; then
      PROMPT_COMMAND=/etc/sysconfig/bash-prompt-default
    elif [ -e /etc/default/bash-prompt-default ]; then
      PROMPT_COMMAND=/etc/default/bash-prompt-default
    elif [[ -e "${XDG_CONFIG_HOME:-$HOME/.config}/bash-prompt-default" ]]; then
      PROMPT_COMMAND=${XDG_CONFIG_HOME:-$HOME/.config}/bash-prompt-default
    else
      # TODO: test if this breaks anything, seems to work in tmux and ssh terms where others didn't.
      PROMPT_COMMAND='printf "\033k%s@%s:%s\033\\" "${USER}" "${HOSTNAME%%.*}" "${PWD/#$HOME/\~}"'
    fi
    ;;
  esac
fi
# Gentoo's implementation without PROMPT_COMMAND:
# Note: Seems to require any subsequent PS1= to be PS1+=
#       or $PS1 added to the end each of these? Would then have to be AFTER main PS1 then.
#case ${TERM} in
#    [aEkx]term*|rxvt*|gnome*|konsole*|interix)
#        PS1='\[\033]0;\u@\h:\w\007\]'
#        ;;
#    screen*)
#        PS1='\[\033k\u@\h:\w\033\\\]'
#        ;;
#    *)
#        unset PS1
#        ;;
#esac

# Source for git information in prompt.
# Avoid double sourcing if bash-completion code already handled this.
if ! type __git_ps1 >/dev/null 2>&1 && [ "${HIDE_GIT_PS1-}" != "1" ]; then
  # Check for programmatic completion and posix mode
  if shopt -q progcomp && ! shopt -oq posix; then
    if [ -f /etc/bash_completion.d/git-prompt.sh ]; then
        . /etc/bash_completion.d/git-prompt.sh
    elif [ -f /usr/share/git-core/contrib/completion/git-prompt.sh ]; then
        . /usr/share/git-core/contrib/completion/git-prompt.sh
    fi
    # Set git prompt information.
    GIT_PS1_SHOWDIRTYSTATE=1
    GIT_PS1_SHOWSTASHSTATE=1
    GIT_PS1_SHOWUNTRACKEDFILES=1
#   GIT_PS1_SHOWUPSTREAM="verbose legacy git"
    GIT_PS1_DESCRIBE_STYLE=default
#   GIT_PS1_SHOWCOLORHINTS=1
  fi
fi
# Stub out function if above fails.
if ! type __git_ps1 >/dev/null 2>&1; then
  __git_ps1() { :; }
fi

# Some common colors in raw escape codes.
# Note: tput commands don't always work and polutes environment.
BASE0=$'\E[38;5;244m'
BASE00=$'\E[38;5;241m'
BASE01=$'\E[38;5;240m'
BASE02=$'\E[38;5;235m'
BASE03=$'\E[38;5;234m'
BASE1=$'\E[38;5;245m'
BASE2=$'\E[38;5;254m'
BASE3=$'\E[38;5;230m'
BLUE=$'\E[38;5;33m'
BOLD=$'\E[1m'
CYAN=$'\E[38;5;37m'
GREEN=$'\E[38;5;64m'
NORMAL_GREEN=$'\E[38;5;32m'
BOLD_GREEN=$'\E[00;1;32m'
MAGENTA=$'\E[38;5;125m'
ORANGE=$'\E[38;5;166m'
RED=$'\E[38;5;160m'
BOLD_RED=$'\E[00;1;31m'
NORMAL_RED=$'\E[38;5;31m'
RESET=$'\E(B\E[m'
VIOLET=$'\E[38;5;61m'
YELLOW=$'\E[38;5;136m'

# root be red
# Note: check for WSL first and clean env.
if ! IS_WSL=`grep -i microsoft /proc/version`; then
  if [ "${EUID}" = "0" ] || [ "$USER" = "root" ]; then
    USER_COLOR=$'\E[38;5;160m'
  elif [ "${EUID}" -ge "1000" ] || [ "$(id -u)" -ge "1000" ]; then
    #USER_COLOR=$'\E[38;5;64m'
    USER_COLOR=$'\E[00;0;32m'
  else
    USER_COLOR=$'\E[38;5;245m'
  fi
  unset IS_WSL
else
  # if we're in WSL use ms blue
  USER_COLOR=$'\E[38;5;33m'
  # Note: Don't unset IS_WSL
fi

# Host colors for common distros. 
#TODO: narrow down distro:flavor, and add more. also alphabetize.
DISTRO=$(grep -e '^NAME=' /etc/os-release)
case "$DISTRO" in
  *Leap*)                                   HOST_COLOR=$'\E[00;0;32m' ;;
  *Tumbleweed*)                             HOST_COLOR=$'\E[38;5;37m' ;;
  *SLE*)                                    HOST_COLOR=$'\E[38;5;64m' ;;
  *Debian*)                                 HOST_COLOR=$'\E[38;5;31m' ;;
  *Kali*)                                   HOST_COLOR=$'\E[38;5;160m' ;;
  *Sparky*)                                 HOST_COLOR=$'\E[38;5;160m' ;;
  *OpenMediaVault*)                         HOST_COLOR=$'\E[38;5;61m' ;;
  *Solus*|*Fedora*|*Korora*)                HOST_COLOR=$'\E[38;5;33m' ;;
  *Red*|*Cent*|*Prox*)                      HOST_COLOR=$'\E[38;5;160m' ;;
  *buntu*)                                  HOST_COLOR=$'\E[38;5;166m' ;;
  *Mageia*)                                 HOST_COLOR=$'\E[38;5;33m' ;;
  *Gentoo*|*Funtoo*|*Calculate*|sabayon)    HOST_COLOR=$'\E[38;5;61m' ;;
  *)                                        HOST_COLOR=$'\E[38;5;245m' ;;
  # If you get a gray host color now you know why.
  # TODO: maybe grep for ANSI_COLOR?
esac

#PS1
if [ "${EUID}" = "0" ] || [ "$USER" = "root" ];then
  PS1="\[${RESET}\]\[${BASE00}\][\[${BASE1}\]\A\[${BASE00}\]]-\[${RESET}\]\[${BASE00}\](\[${USER_COLOR}\]\u\[${RESET}\]\[${BASE00}\]@\[${RESET}\]\[${HOST_COLOR}\]\h\[${RESET}\]\[${BASE00}\])-(\[${RESET}\]\[${CYAN}\]\w\[${YELLOW}\]\$(__git_ps1 \" (%s)\")\[${RESET}\]\[${BASE00}\])\[${USER_COLOR}\]#\[${RESET}\] "
elif [ "${EUID}" -ge "1000" ] || [ "$(id -u)" -ge "1000" ]; then
  PS1="\[${RESET}\]\[${BASE00}\][\[${BASE1}\]\A\[${BASE00}\]]-\[${RESET}\]\[${BASE00}\](\[${USER_COLOR}\]\u\[${RESET}\]\[${BASE00}\]@\[${RESET}\]\[${HOST_COLOR}\]\h\[${RESET}\]\[${BASE00}\])-(\[${RESET}\]\[${CYAN}\]\w\[${YELLOW}\]\$(__git_ps1 \" (%s)\")\[${RESET}\]\[${BASE00}\])\[${USER_COLOR}\]\$\[${RESET}\] "
fi

unset DISTRO BASE0 BASE00 BASE01 BASE02 BASE03 BASE1 BASE2 BASE3 BLUE BOLD CYAN GREEN NORMAL_GREEN BOLD_GREEN MAGENTA ORANGE RED BOLD_RED NORMAL_RED RESET VIOLET YELLOW USER_COLOR HOST_COLOR