Really basic way to display the currently "active" chef-server in your bash prompt

.bashrc

function parse_chef_server
{
    if [ -r .chef/knife.rb ]; then
        knife_config='.chef/knife.rb'
    elif [ -r ../.chef/knife.rb ]; then
        knife_config='../.chef/knife.rb'
    fi

    ## Make sure that the knife_config was actually set before running the grep
    [[ $knife_config ]] && grep chef_server_url $knife_config | awk -F/ '{print "[chef:" $3 "]"}'
}

PS1="\[\033[01;32m\]\u@\h \[\033[01;34m\]\W \[\033[00m\] \n\$(parse_git_branch)\$(parse_chef_server)$ "