notmuch-mutt: support for duplicate message removal

[Jani Nikula]

On Wed, 01 Aug 2012, "Kevin J. McCarthy" <kevin at 8t8.us> wrote:
> Jani Nikula wrote:
>> I'm guessing you get the duplicates because you have dupes in the mail
>> store, and 'notmuch search --output=files' prints all the filenames
>> associated with each matching message, rather than any other reason. The
>> presented approach will only remove identical files, and will leave
>> behind files that are basically the same message, but have differing
>> headers, e.g. due to being received through different channels. Is this
>> what you want?
>
> This method was something we felt comfortable enabling by default.
>
> Stefano and I discussed adding a (by default off) option to remove
> duplicates by message-id, but wanted to get this patch merged first and
> then think about it.

Sounds reasonable, especially considering [1]. I have no comments on the
patches; I'm not a notmuch-mutt (or perl) user.

>> Perhaps an option to 'notmuch search --output=files' to print only one
>> filename (even if there are many) per message would be interesting.
>
> This would be useful for the second approach.  If it's easy to do, that
> would be great.

Apart from [1], the hardest part will be bikeshedding about the option
name. ;)

BR,
Jani.

[1] id:"87d33av2sg.fsf at nikula.org"