Fish compatible version of productivty scripts https://gist.github.com/bennylope/dd0c723b6586ded254b3bd673a7861a3

slacktime.fish

function slacktime 
  while read line;
  if [ (string match "*WORKTIME" "$line") ]
      continue
    else
        echo $line
    end
  end < /etc/hosts  > /tmp/hosts
  sudo cp /tmp/hosts /etc/hosts
end

worktime.fish

function worktime
  while read line;
    echo "127.0.0.1 $line # WORKTIME"
    echo "fe80::1%lo0 $line # WORKTIME"
    echo "127.0.0.1 www.$line # WORKTIME"
    echo "fe80::1%lo0 www.$line # WORKTIME"
  end < $HOME/.blocked_sites | sudo tee -a /etc/hosts > /dev/null
end