how to set file coding system but using per directory variables

[Paul K]

when I add following as first llne in a buffer it is properly interpretted

-*- coding: windows-1250-dos -*-


I don't want to add any headers to files though, so I created
.dir-locals.el file with following content:
((nil . ((buffer-file-coding-system . windows-1250-dos)
         (coding-system-for-read . windows-1250-dos)
         (coding-system-for-write . windows-1250-dos))))


then when I open file coding system is not automatically converted, I need
to do extra buffer reverting for declared coding system to be applied.

do You have any ideas?

best regards,