shell prompt

.bashrc

# Shell prompt stuff
function dashes() {
  COLS=$(tput cols)

  D=${PWD/$HOME/\~}
  U=$(whoami)
  H=$(hostname -s)
  FLEN=16 # constant for spaces & timestamp

  CLEN=$(( ${#D}+${#U}+${#H}+$FLEN ))
  DLEN=$(( $COLS-$CLEN ))

  DASH="━"
  #DASH="─"
  DASHES=""
  for (( a=1; a <= DLEN; a++ )); do
    DASHES=$DASHES$DASH
  done

  echo -n ${DASHES}
}

function makePrompt() {
  # ANSI color codes
  RS="\[\033[0m\]"    # reset
  HC="\[\033[1m\]"    # hicolor
  UL="\[\033[4m\]"    # underline
  INV="\[\033[7m\]"   # inverse background and foreground
  FBLK="\[\033[30m\]" # foreground black
  FRED="\[\033[31m\]" # foreground red
  FGRN="\[\033[32m\]" # foreground green
  FYEL="\[\033[33m\]" # foreground yellow
  FBLE="\[\033[34m\]" # foreground blue
  FMAG="\[\033[35m\]" # foreground magenta
  FCYN="\[\033[36m\]" # foreground cyan
  FWHT="\[\033[37m\]" # foreground white
  BBLK="\[\033[40m\]" # background black
  BRED="\[\033[41m\]" # background red
  BGRN="\[\033[42m\]" # background green
  BYEL="\[\033[43m\]" # background yellow
  BBLE="\[\033[44m\]" # background blue
  BMAG="\[\033[45m\]" # background magenta
  BCYN="\[\033[46m\]" # background cyan
  BWHT="\[\033[47m\]" # background white

  RARR="▶"
  LARR="◀"

#  echo -n "$HC$BBLK$FCYN \u@\h $RS$BCYN$FBLK \w \$(dashes) $RS$HC$BBLK$FCYN \t $RS\n$HC$BBLK$FCYN$INV \$ $RS"
  echo -n "$HC$BBLK$FCYN \u@\h $RS$FBLK \w \$(dashes) $RS$HC$BBLK$FCYN \t $RS\n$HC$BBLK$FCYN \$ $RS"
}

export PS1="$(makePrompt)"

The output of this in your terminal will look like this:

<username@hostname:~>---------------------------------------------------------------<11:30:09>
 $ cd Documents/
<username@hostname:~/Documents>-----------------------------------------------------<11:31:04>
 $ 

The string of dashes will adapt to fit the terminal width and the current directory so it should be pretty flexible.

UPDATE: fixed some problems & added colors

 ben@ubuntu-lappy  ~/Documents ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 09:18:20 
 $ 

also for reference - https://unicode-table.com/en/#2501