svn diff wrapper

gistfile1.sh

function sdr {
  local rev;
  local file;
  if [ $# = 1 ]; then
    if expr "$1" : '[0-9]*' > /dev/null ; then
      rev=$1;
      file='';
    else
      file=$1
      rev=$(svn ls -v $file | awk '{print $1}')
    fi
  else
    rev=$1
    file=$2
  fi
  local bef_rev=$(expr $rev - 1)
  svn diff -x -b -r $bef_rev:$rev $file | less -r
}