The spring-boot-gradle-plugin does not delegate system properties to the spring boot application

[holgerstolzenberg]

I tried to run a spring boot application with an external configuration file via gradle. The following command illustrates that:

gradle bootRun -Pspring.config.location=/etc/application.properties

The application fails to start because the properties file could not be located and so no Environment is created. This also causes trouble when trying to run the app from IDE with the system property configured within the launch configuration.

This is a real showstopper for me.

I have already provided a pull request for that. I haven´t used the Gradle API until now, i do not know if there are any possible side effect.

It would be great if you have a look at it.

[dsyer]

Duplicates #592. (You don't need a separate issue for a pull request.)