Where do I call mnesia:create_schema/1 in a relx release?

Question

I have an OTP application 'myapp' which depends on mnesia. Where should I put the call to mnesia:create_schema/1?

If I add the dependency to {applications,[]} in myapp.app.src, mnesia starts first and I can't call create_schema in myapp:start/2. It might make sense to call it in myapp.script/myapp.boot, but relx doesn't let me add anything to that.

I don't want to make mnesia an included application.

EDIT: I've found a workaround by listing mnesia in the applications in the relx config, but running mnesia:create_schema([node()]), application:ensure_all_started(mnesia, permanent) in myapp:start/2. Is there a better way?

Answer 1

I had this problem too. You should include {mnesia, load} in relx app list, create schema in start/2 callback of your application and start mnesia. It's good to write {mnesia, [{dir, "YourMnesiaDBPath"}]} in sys.config too.