Working with application.properties files

[shalastra]

What happened?

My application is using application.properties file with values generated during build by Gradle. After executing nativeimage the resources are not attached(?) hence the application crashes.

I have tried something like this:

option '-H:IncludeResources=\'src/main/resources/application.properties$\''

as well, as regex:

option '-H:IncludeResources=\'.*/application.*properties$\''

I followed this instructions:
https://github.com/oracle/graal/blob/master/substratevm/Resources.md

And here the way I load resources:

InputStream resourceAsStream = MainApplication.class.getResourceAsStream("/application.properties");

And exception I'm getting when executing the native image:

Exception in thread "main" java.lang.NullPointerException: inStream parameter is null

What did you want to happen?

Clarify how to use application.properties with native image.