colorful and informative PS1 bash prompt

.bashrc_ps1

# have the date and time in the prompt as well as username@host  and current directory
# the time display is extremely useful - for instance when an ssh session dies  , etc
# my values are for DARK backgrounds!!!
# to test the various color values on YOUR termial you can do something like 

# i=0 ; while [ $i -ne 255 ]; do   i=$(($i+1));  tput setaf $i && echo -n "setaf $i in ncurses "; tput setaf $i | xxd; done
# i.e. loop thru these 2 commands for 0-255 
 tput setaf $i && echo -n "setaf $i in ncurses "
 tput setaf $i | xxd 
 ################################################################################
 ########### i did not compose the below bashrc stuff - i just copied it and edited things such as the colors -
# i have no idea where these stanzas came from 


#force_color_prompt=yes
# instead of forcing the color prompt use the below:

# set a fancy prompt (non-color, unless we know we "want" color)
case "$TERM" in
   xterm-color|*-256color) color_prompt=yes;;
esac

# and then - to test via tput setaf 

if [ "$color_prompt" = yes ]; then                                                                                                                                                                                                                                                                                                          
if [ -n "$force_color_prompt" ]; then
    if [ -x /usr/bin/tput ] && tput setaf 1 >&/dev/null; then
        # We have color support; assume it's compliant with Ecma-48 
        # (ISO/IEC-6429). (Lack of such support is extremely rare, and such
        # a case would tend to support setf rather than setaf.)
        color_prompt=yes
    else
        color_prompt=
    fi
fi
        PS1='${debian_chroot:+($debian_chroot)}\[\033[00;34m\]\u\[\033[32m\]@\h:\[\033[00;33m\]\w\[\033[00;36m\] \d \[\033[01;33m\]\t\[\033[00m\] \$ '
    # PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\] \d \[\033[01;33m\]\t\[\033[00m\] \$ '
    # PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\] \d \t \$ '
else
    PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w\$ '
fi
unset color_prompt force_color_prompt
                                                                                                                                                                                                                                                                                                                                            
# If this is an xterm set the title to user@host:dir
case "$TERM" in
xterm*|rxvt*)
    PS1="\[\e]0;${debian_chroot:+($debian_chroot)}\u@\h: \w\a\]$PS1"
    ;;
*)
    ;;
esac
                                                                                                                                                                                                                                                                                                                                            
# enable color support of ls and also add handy aliases
if [ -x /usr/bin/dircolors ]; then
    test -r ~/.dircolors && eval "$(dircolors -b ~/.dircolors)" || eval "$(dircolors -b)"
    alias ls='ls --color=auto'
    #alias dir='dir --color=auto'
    #alias vdir='vdir --color=auto'
                                                                                                                                                                                                                                                                                                                                            
    #alias grep='grep --color=auto'
    #alias fgrep='fgrep --color=auto'
    #alias egrep='egrep --color=auto'
fi
                                                                                                                                                                                                                                                                                                                                            
# colored GCC warnings and errors
#export GCC_COLORS='error=01;31:warning=01;35:note=01;36:caret=01;32:locus=01:quote=01'