Re: searching for a message by path

[Michael J Gruber <michaeljgruber+grubix+git@gmail.com>]

Am So., 13. Okt. 2024 um 00:59 Uhr schrieb David Bremner <david@tethera.net>:
>
> David Bremner <david@tethera.net> writes:
>
> > Frederick Eaton <frederik@ofb.net> writes:
> >
> >> If Notmuch is meant to function as an abstraction layer over message
> >> files stored on the file system, then why doesn't it provide a
> >> standard way to go from file paths to Notmuch messages?
> >
> > Although I think notmuch as it exists is far from "an abstraction
> > layer", the specific feature request seems reasonable. It would need
> > someone who wants it to get familiar with the low level implementation
> > details of notmuch. In particular it would require writing a database
> > upgrade and having a new version of the database schema.
>
> I was looking at the code, and I realized it is not actually as hard as
> that.  Essentially the code of notmuch_database_find_message_by_filename
> needs to be wrapped in a PostingSource following the model of
> RegexpPostingSource (regexp-fields.cc). The fact that no database format
> changes (or even reindexing) are needed, makes this a much lower risk
> project.

If you want to map filenames to mids, you can use xapian.
Say, $relone is the filename path relative to the notmuch basedir
~/.mail/.notmuch/.

```
dirterm=XDIRECTORY$(dirname $relone)
dirdocid=$(xapian-delve -1 -t $dirterm ~/.mail/.notmuch/xapian/ | tail -n1)
docterm=XFDIRENTRY${dirdocid}:$(basename $relone)
docid=$(xapian-delve -1 -t $docterm ~/.mail/.notmuch/xapian/ | tail -n1)
xapian-delve -1 -t $docterm -r $docid -V1 ~/.mail/.notmuch/xapian/ |
grep Value | cut -d' ' -f6-
```
... or grep Message-ID :)
Cheers
Michael