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My Bash PS1 with git branch info

I spent an hour playing around with my bash PS1 setting. I wanted some useful information about which git branch I am on, and some colors.

After reading a couple of articles on it like this one and this one I tried it a bit myself and ended up with this:

Here is the PS1 code:

PS1_END_SIGN=

export PS1='  \[\e[1;36m\]$(git branch &>/dev/null; if [ $? -eq 0 ]; then echo " ($(git branch | grep '^*' |sed s/\*\ //))"; fi)  \[\e[1;37m\] $PS1_END_SIGN \[\e[00m\]  '

The PS1_END_SIGN can be set to anything you want. The PS1 setting includes some coloring and output of the current branch if you are in a git repository.