Show the current git branch you're working and whether it's dirty in your prompt

gistfile1.sh

# Regular Colors
Black="\[\033[0;30m\]"        # Black
Red="\[\033[0;31m\]"          # Red
Green="\[\033[0;32m\]"        # Green
Yellow="\[\033[0;33m\]"       # Yellow
Blue="\[\033[0;34m\]"         # Blue
Purple="\[\033[0;35m\]"       # Purple
Cyan="\[\033[0;36m\]"         # Cyan
White="\[\033[0;37m\]"        # White

Color_Off="\[\033[0m\]"

# Various variables you might want for your PS1 prompt instead
PathShort="\w"
PathFull="\W"


export PS1=$Color_Off'$(git branch &>/dev/null;\
if [ $? -eq 0 ]; then \
  echo "$(echo `git status` | grep "nothing to commit" > /dev/null 2>&1; \
  if [ "$?" -eq "0" ]; then \
    # @4 - Clean repository - nothing to commit
    echo "'$Green'"$(__git_ps1 "(%s)");\
  else \
    # @5 - Changes to working tree
    echo "'$Red'"$(__git_ps1 "{%s}");\
  fi) '$Yellow$PathShort$Color_Off$Purple\€$Color_Off' ";\
else \
  # @2 - Prompt when not in GIT repo
  echo "\u\[\033[00;31m\]@\[\033[01;36m\]\h\[\033[01;33m\]'$Yellow$PathShort$Color_Off$Purple\€$Color_Off'"; \
fi)'