OS X terminal git branch color PS1 fix CTRL-R oddities

gistfile1.sh

case ${TERM}
  in xterm*|rxvt*|Eterm|aterm|kterm|gnome*|interix)
    PROMPT_COMMAND='update_terminal_cwd;GIT_BRANCH=`test -d .git \
      && git status --porcelain -b 2> /dev/null \
      | grep --color=never -e ''\#\# '' \
      | sed "s/^\#\#.\(.*\)/\ \(\1\)/" \
      | tr -d "\n"`'
    use_color=true
    # unset PROMPT_COMMAND
  ;;
  screen)
    unset PROMPT_COMMAND
    use_color=true
  ;;
esac

PS1='\[\e[32;40m\]\u@\h\[\e[0m\]\[\e[33;40m\]$GIT_BRANCH\[\e[0m\]:\w\$\[\e[0m\] '