[kdepim-users] How to disable mail indexing with Akonadi search

[Martin Steigerwald]

Am Montag, 8. Februar 2016, 16:21:02 CET schrieb Martin Steigerwald:
> Am Montag, 8. Februar 2016, 10:15:55 CET schrieb Daniel Vrátil:
> > On Saturday, February 6, 2016 7:35:17 PM CET Martin Steigerwald wrote:
> > > Back in Baloo times it was easy to disable mail indexing. But with
> > > Akonadi
> > > Search which as I understand is basically a renamed Baloo for mail stuff
> > > I
> > > didn´t find a way yet. Can one disable it?
> 
> […]
> 
> > You can prevent the Indexer from starting by modifying /usr/share/akonadi/
> > agents/akonadindexingagent.desktop, unsetting "AutoStart" capability.
> 
> Thank, Dan. I think that would be at the self-compiled location for me.
> 
> Okay, found it as akonadiindexingagent.desktop :). I didn´t find any
> Autostart parameter in there, so I set "Autostart=false".

Okay, after I found that "Autostart=false" didn´t work to prevent the agent 
from starting, I found

 38 X-Akonadi-MimeTypes=text/directory
 39 X-Akonadi-Capabilities=Unique,Autostart
 40 X-Akonadi-Identifier=akonadi_indexing_agent

and removed "Autostart" from capabilities and it still autostarts.

I looked a bit in the akonadi-search repo, file scheduler.cpp. And I think I 
may have a chance with

 71     //Trigger a full sync initially
 72     if (!group.readEntry("initialIndexingDone", false)) {
 73         qCDebug(AKONADI_INDEXER_AGENT_LOG) << "initial indexing";
 74         QMetaObject::invokeMethod(this, "scheduleCompleteSync", 
Qt::QueuedConnection);                                                                                  
 75     }

setting initialIndexDone to true in some config file. Hmmm, still baloorc!?

And its set there already: initialIndexingDone=true

So I don´t get why it reindexes all the stuff again.

 61     KConfig 
config(Akonadi::ServerManager::addNamespace(QStringLiteral("baloorc")));
 62     KConfigGroup group = config.group("Akonadi");

Okay, I at least found where it initializes a complete sync:

130 void Scheduler::scheduleCompleteSync()

But I bet the changes to access maildir items without storing them into DB 
initially need to be done in maildir resource, not in indexing. But I can at 
least check whether it respects the "do not index" this folder setting. I told 
it to leave my biggest folders alone, yet still it hogs down my system like 
crazy.

Hmmm, it seems it continues with Akonadi::CollectionFetchJob which seems to be 
a method of Akonadi and I bet from there it calls into Maildir resource, 
stuffes the results into the database and then… at some expires them again.

I think with some help I can at least get a basic understanding how it works. 
I know some C, but not C++.

Thanks,
-- 
Martin