You can find source code on github, of course: http://github.com/Karry/osmscout-sailfish . I forgot to add link to description.
Hi Miklos. The reason why here is available newer version is that every submit to Jolla Harbour have to be verified by Jolla QA team. And this process tooks one (working) day usual... I started to use OpenRepos too because I got message that Jolla Harbour is not available on devices that are not supported by Jolla officially.
I have just seen that the OSM Scout is available here too, an I have seen that a newer version is available here than the Habour one. Which distribution channel will be the primary one?
Also I would recommend you to upload the icon to here too.