.bashrc script with some git options enabled

.bashrc

env=~/.ssh/agent.env                                                                                     
                                                                                                         
agent_load_env () { test -f "$env" && . "$env" >| /dev/null ; }                                          
                                                                                                         
agent_start () {                                                                                         
    (umask 077; ssh-agent >| "$env")                                                                     
    . "$env" >| /dev/null ; }                                                                            
                                                                                                         
agent_load_env                                                                                           
                                                                                                         
# agent_run_state: 0=agent running w/ key; 1=agent w/o key; 2= agent not running                         
agent_run_state=$(ssh-add -l >| /dev/null 2>&1; echo $?)                                                 
                                                                                                         
if [ ! "$SSH_AUTH_SOCK" ] || [ $agent_run_state = 2 ]; then                                              
    agent_start                                                                                          
    ssh-add                                                                                              
elif [ "$SSH_AUTH_SOCK" ] && [ $agent_run_state = 1 ]; then                                              
    ssh-add                                                                                              
fi                                                                                                       
                                                                                                         
unset env                                                                                                
                                                                                                         
export PS1='\[\e[33m\][\t]\[$(tput sgr0)\] '$'=> \[\e[32m\]\w\[\e[35m\]$(__git_ps1)\[\e[0m\] '$'\n\$\[\e[
0m\] '                                                                                                   
                                                                                                         
export GIT_PS1_SHOWDIRTYSTATE=1                                                                          
export GIT_PS1_SHOWSTASHSTATE=1                                                                          
export GIT_PS1_SHOWUNTRACKEDFILES=1                                                                      
export GIT_PS1_SHOWUPSTREAM="auto"