my fancy prompt for cloud9 IDE Ruby on Rails environment

.bashrc

# ~/.bashrc: executed by bash(1) for non-login shells.
# see /usr/share/doc/bash/examples/startup-files (in the package bash-doc)
# for examples

. /etc/apache2/envvars

# If not running interactively, don't do anything else
[ -z "$PS1" ] && return

# don't put duplicate lines or lines starting with space in the history.
# See bash(1) for more options
HISTCONTROL=ignoreboth

# append to the history file, don't overwrite it
shopt -s histappend

# for setting history length see HISTSIZE and HISTFILESIZE in bash(1)
HISTSIZE=1000
HISTFILESIZE=2000

# check the window size after each command and, if necessary,
# update the values of LINES and COLUMNS.
shopt -s checkwinsize

# make less more friendly for non-text input files, see lesspipe(1)
[ -x /usr/bin/lesspipe ] && eval "$(SHELL=/bin/sh lesspipe)"

# Alias definitions.
# You may want to put all your additions into a separate file like
# ~/.bash_aliases, instead of adding them here directly.
# See /usr/share/doc/bash-doc/examples in the bash-doc package.

if [ -f ~/.bash_aliases ]; then
    . ~/.bash_aliases
fi

# enable programmable completion features (you don't need to enable
# this, if it's already enabled in /etc/bash.bashrc and /etc/profile
# sources /etc/bash.bashrc).
if [ -f /etc/bash_completion ] && ! shopt -oq posix; then
    . /etc/bash_completion
fi

ruby_version=`/usr/local/rvm/bin/rvm-prompt v`

NONE="\[\033[0m\]"    # unsets color to term's fg color

# regular colors
K="\[\033[0;30m\]"    # black
R="\[\033[0;31m\]"    # red
G="\[\033[0;32m\]"    # green
Y="\[\033[0;33m\]"    # yellow
B="\[\033[0;34m\]"    # blue
M="\[\033[0;35m\]"    # magenta
C="\[\033[0;36m\]"    # cyan
W="\[\033[0;37m\]"    # white

# empahsized (bolded) colors
EMK="\[\033[1;30m\]"
EMR="\[\033[1;31m\]"
EMG="\[\033[1;32m\]"
EMY="\[\033[1;33m\]"
EMB="\[\033[1;34m\]"
EMM="\[\033[1;35m\]"
EMC="\[\033[1;36m\]"
EMW="\[\033[1;37m\]"

# background colors
BGK="\[\033[40m\]"
BGR="\[\033[41m\]"
BGG="\[\033[42m\]"
BGY="\[\033[43m\]"
BGB="\[\033[44m\]"
BGM="\[\033[45m\]"
BGC="\[\033[46m\]"
BGW="\[\033[47m\]"

function parse_git_deleted {
  [[ $(git status 2> /dev/null | grep deleted:) != "" ]] && echo "-"
}
function parse_git_added {
  [[ $(git status 2> /dev/null | grep "Untracked files:") != "" ]] && echo '+'
}
function parse_git_modified {
  [[ $(git status 2> /dev/null | grep modified:) != "" ]] && echo "*"
}
function parse_git_dirty {
  # [[ $(git status 2> /dev/null | tail -n1) != "nothing to commit (working directory clean)" ]] && echo "☠"
  echo "$(parse_git_added)$(parse_git_modified)$(parse_git_deleted)"
}
function parse_git_branch {
  #echo $(parse_git_dirty)
  git branch --no-color 2> /dev/null | sed -e '/^[^*]/d' -e "s/* \(.*\)/\1 $(parse_git_dirty)/"
}

function git_name {
  git branch --no-color 2> /dev/null | sed -e '/^[^*]/d' -e "s/* \(.*\)/\1/"
}


function ruby_ver {
  rvm-prompt
  #ruby -e 'print RUBY_VERSION'
}


function color_git {
  if [[ $(git_name) != "" ]]
  then
    if [[ $(git_name) == "master" ]]
    then
      COLOR=$EMC
    else
      COLOR=$EMR
    fi
    if [[ $(parse_git_dirty) == "" ]]
    then
      echo "($COLOR$(git_name)$NONE)"
    else
      echo "($COLOR$(git_name) $EMG$(parse_git_added)$EMY$(parse_git_modified)$EMR$(parse_git_deleted)$NONE)"
    fi
  fi
}
function prompt {
  if [[ $? = "0" ]]; then RET=$G; else RET=$R; fi;
  PS1="\[\033[01;32m\]${C9_USER}\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\[\033[1;36m\] $NONE$(color_git)$NONE using \[\033[1;36m\]$ruby_version\[\033[38;5;15m\] $ "
}

PROMPT_COMMAND=prompt
# If this is an xterm set the title to user@host:dir
case "$TERM" in
xterm*|rxvt*)
    PS1="\[\e]0;${debian_chroot:+($debian_chroot)}\u@\h: \w\a\]$PS1"
    ;;
*)
    ;;
esac

export rvm_silence_path_mismatch_check_flag=1