Different exit status on ”sync” depending on whether any data has been updated

[dilyanpalauzov]

I want to sync with a remote read-only calendar over CalDAV and when the data changed, combine all calendar objects into one and render the objects int HTML. To my undestanding storage type singlefile is slow, in particular it is slower than doing cat of all files.

Please make “vdirsyncer sync” return different exit code, depending on whether some dara was updated. I want to concatenade the calendar object files, only when this operation has added value.

[mathstuf]

The systemd unit files would need updated to understand that the new non-zero exit code is not a failure.