digikam-select: Batch export from Digikam using the command line

[Jens Benecke]

Hi everybody,

I have finally finished scratching my very personal itch with Digikam 
and that was to be able to automatically (!) (re)export a fixed set of 
images from the Digikam database, without constantly having to perform 
the task manually in Digikam.

May I humbly present "digikam-select.rb", first release:

     https://github.com/jensb/digikam-select

The idea is to be able to write scripts that automatically select images 
(and other files) from the digikam database based on rating, tags or 
album name and put copies somewhere else (e.g. on a NAS). The images can 
optionally be resized or recompressed using ImageMagick's "convert" 
utility. It is also possible to create symlinks or hardlinks saving 
space, only referencing matching images.

I use this for the rest of my family: once a day digikam-select.rb 
selects all images tagged "for-Family", recompresses them using 
ImageMagick and recreates my album structure on our home NAS using these 
recompressed images. These folders are available to all family members 
and also automatically synced to our family Android tablet.
So any time we want to go visit friends and maybe show some pictures we 
just grab the tablet and are sure only "suitable" images (but all good 
ones) are on there!

There are many possible use cases, this is just one of them. Have a 
look, try it out, report bugs (on Github)!

Thanks & enjoy,

Jens