[RFC PATCH 2/4] Add NOTMUCH_MESSAGE_FLAG_EXCLUDED flag

[Mark Walters]

> The cli stuff needs thought (about what it should do rather than
> how to do it).

Ok I have thought about the cli interface. My thoughts are as follows:

count/search/show should all have a --do-not-exclude option.

notmuch count:

        messages: just output count of matching not-excluded

        threads: count threads matching in a non-excluded message

notmuch search: 

        default/summary should output line as in the current patch with
        number matching being number non-excluded matching (so some will
        be zero)

        messages/files/tags should be matching not-excluded

        threads:  show thread ids of messages matching in a non-excluded message

notmuch show: 

        raw and part both deal with a single message so should output it
        regardless of exclude flags.

        text/json can give out the results including the exclude flag

        mbox only include matching not-excluded

The rationale is that all formats which can return an exclude flag do;
those that cannot omit the excluded results since the caller can just
call without setting the excludes if they want the full results.

Does that seem reasonable?

Best wishes

Mark