Crankshaft – A GNU/Linux for the Raspberry Pi as an Android Auto headunit
Is a whole custom OS really necessary?
Couldn't you just simply use Mopidy(<a href="https://www.mopidy.com/" rel="nofollow">https://www.mopidy.com/</a>)? Possibly with some additional plugins required to make it work for cars.<p>It runs on RPi and implements mpd protocol, hence, is fully compatible with mpd clients and has many more clients implemented targeting Mopidy itself.<p>Also, it plays music from Spotify, YouTube, SoundCloud and whatnot.