-- how to filter the command stream usefully. Typing something like '.lua' is now
-- short for 'list .lua', and typing a number is interpreted as a cd  command.
-- Also, if the typed file is a tar or zip archive, then extract it!

add_event('command',function(line)
    if line:find '^%.%a' then
        return 'list '..line
    elseif line:isdigit() then
        return 'cd '..line
    elseif path.isfile(line) then
        if line:endswith {'.tgz','.tar.gz'} then
            return 'tar xzf '..line
        elseif line:endswith '.zip' then
            return 'unzip '..line
        end
    end
end)