git branch name in prompt

.bash_profile

##
# Bash customizations
##

export CLICOLOR=1 # Enable color shell
export LSCOLORS=ExFxCxDxBxegedabagacad # Define colors
export COLOR_RED="\e[0;31m"
export COLOR_PINK="\e[35;1m"
export COLOR_NORMAL="\e[m"

__git_ps1 () 
{
    local b="$(git symbolic-ref HEAD 2>/dev/null)";
    if [ -n "$b" ]; then
        printf " (%s)" "${b##refs/heads/}";
    fi
}

export PS1="$COLOR_PINK\u$COLOR_NORMAL \w$COLOR_RED\$(__git_ps1 ' (%s)')$COLOR_NORMAL \$ "