Galleria.io is great because it is Free/Libre Software (MIT-licensed), simply does what it is supposed to do, and requires not yet another plugin for WordPress nor a database backend. It also supports mobile devices and its typical touch gestures. Furthermore it enables self-hosted galleries and does not require to rely on any cloud services where you might loose control on your data.
The only thing that I was missing was a straight forward way to automatically generate a gallery. Creating it by hand – as for example described in Galleria.io’s “Beginners Guide” – is time-consuming, cumbersome, and error-prone. So the overall idea was to create a ready-to-run Galleria.io gallery based on a given folder that contains just the image files by using a shell script.
In detail I wanted to have the following functionality: