Re: [Tracker] Enhancement proposal: Automatic reindexing when adding new extractors

[Martyn Russell <martyn lanedo com>]

On 17/02/10 14:43, Adrien Bustany wrote:
> > we don't have to change two files, but simply implement a method of
> > storing the md5s.
> But do we have one desktop file per extractor here, or one for Tracker ?

OK, let me try to be a bit clearer :)

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Most applications install a .desktop file already. In this .desktop 
file, the mime type(s) are often included. For example:

Eye of GNOME's desktop file: /usr/share/applications/eog.desktop

MimeType=image/bmp;image/gif;image/jpeg;image/jpg;image/pjpeg;image/png;image/tiff;image/x-bmp;image/x-gray;image/x-icb;image/x-ico;image/x-png;image/x-portable-anymap;image/x-portable-bitmap;image/x-portable-graymap;image/x-portable-pixmap;image/x-xbitmap;image/x-xpixmap;image/x-pcx;image/svg+xml;image/svg+xml-compressed;image/vnd.wap.wbmp;

So, having our own .desktop file in /usr/share/tracker/extractors just 
to duplicate the same information (which may become out of sync too) 
seems wrong to me. Instead, I would rather have a file which has 
something like:

[eog.desktop]
DesktopFile=/usr/share/applications/eog.desktop
ShouldReindex=

and when we install an up to date extractor which has fixes for specific 
mime types, we can then just set the ShouldReindex value to something like:

ShouldReindex=image/gif;

and when we are done with the reindex, we can set it to nothing again.

--

Hmm, just considering this a bit more, storing a "state" in a $prefix 
directory is not really a good idea. This means that once we have (let's 
say) reindexed the data, we would then need root permissions to change 
the file we keep in $datadir/tracker/extractors.

This also causes problems when trying to think of a cross-user solution.

> The idea was to be able to update extractors independantly from Tracker
> itself...

By "update" you mean, change this .ini type file which we keep around 
with mime types right?

--
Regards,
Martyn