Sometimes __git_ps1 takes too long. This disables it when we ^C.

git_ps1.sh

# via https://gist.github.com/623371

if [[ $(declare -f __git_ps1) ]]; then
    export GIT_PS1_SHOWDIRTYSTATE=1
    export GIT_PS1_SHOWSTASHSTATE=1
    export GIT_PS1_SHOWUNTRACKEDFILES=1

    git_ps1_disable ()
    {
        _skip_git_ps1=1
    }
    git_ps1_enable ()
    {
        unset _skip_git_ps1
    }
    _update_prompt ()
    {
        local this_git_status=""
        if [ -z "${_skip_git_ps1}" ]; then
            this_git_status=$(__git_ps1 "(%s)")
            case $? in
                0 ) : ;;
                130 ) git_ps1_disable;; # If we break that last command because it's too slow, stop trying it
            esac
        fi
        export PS1=": \u@\h \w${this_git_status}; "
    }
    export PROMPT_COMMAND=_update_prompt
fi