#!/bin/sh

# see new stuff
if [ -t 1 ]; then
  # connected to a tty => use glorious technicolour
  exec cvs diff -rBASE -rHEAD "$@" 2>&1 | \
    egrep -v 'tag BASE is not in file' | \
    colour-diff-output | \
    diff-less
else
  # probably piping to a file, use black and white
  exec cvs diff -rBASE -rHEAD "$@" 2>&1 | \
    egrep -v 'tag BASE is not in file'
fi