Bash Prompt

bashrc

# based on the prompt from
# http://www.gilesorr.com/bashprompt/prompts/twtty.html
function prompt_command {

    TERMWIDTH=${COLUMNS}
    #   Calculate the width of the prompt:
    hostnam=$(echo -n $HOSTNAME | sed -e "s/[\.].*//")
    #   "whoami" and "pwd" include a trailing newline
    #usernam=$(whoami)
    newPWD="${PWD}"
    #   Add all the accessories below ...
    let promptsize=$(echo -n "${USER}@${hostnam} -${PWD}HH" \
                     | wc -c | tr -d " ")
    let fillsize=${TERMWIDTH}-${promptsize}
    fill=""
    while [ "$fillsize" -gt "0" ]
    do
        fill="${fill}-"
            let fillsize=${fillsize}-1
    done

    if [ "$fillsize" -lt "0" ]
    then
       # if pwd is to large left-truncate it
       let cut=2-${fillsize}
       newPWD="$(echo -n $PWD | sed -e "s/\(^.\{$cut\}\)\(.*\)/\2/")"
       fill=""
       prefill="..."
    else
       # else add a space to hint for a full path
       fill="${fill} "
       prefill=""
    fi
    # On some shells we don't have PS2, so we fix PS1 here.
    user_id=`id -g`
    if [ "$user_id" = "0" ]; then
      cursor='#'
    else
      cursor='$'
    fi

    ps_time=`date '+%H:%M'`
}


PROMPT_COMMAND=prompt_command

function twtty {

local GRAY="\[\033[1;30m\]"
local LIGHT_GRAY="\[\033[0;37m\]"
local WHITE="\[\033[1;37m\]"
local NO_COLOUR="\[\033[0m\]"

local LIGHT_BLUE="\[\033[1;34m\]"
local YELLOW="\[\033[1;32m\]"

PS1="\n$TITLEBAR\
$WHITE\${prefill}$YELLOW\${newPWD} \
\${fill}$YELLOW\${ps_time}$LIGHT_BLUE@$YELLOW\$hostnam\
\n\
$WHITE\${cursor}$NO_COLOUR "

PS2="$YELLOW>$NO_COLOUR "
}

twtty
unset twtty