Spring boot: external properties file an PropertySource - spring

Question

I am developing a spring boot application with gradle.
I would love to tell spring where to read .properties files with a parameter. Since I am still running it via gradle, I have added this to my build.gradle
bootRun {
args = [
"--spring.config.additional-location=file:/path/to/my/props/folder/,file:/path/to/another/props/folder/"
]
}
into /path/to/my/props/folder/ I have created a file remote-connection.properties:
### remote-connection
remote.ip.address=127.0.0.1
remote.ip.port=5001
and I am trying to load those props like this
#RestController
#PropertySource("file:remote-connection.properties")
public class MyController {
#Value("${remote.ip.address}")
private String remoteIpAddress;
}
When i run ./gradlew bootRun i have the following error
org.springframework.beans.factory.BeanDefinitionStoreException: Failed to parse configuration class [my.package.MyApplication]; nested exception is java.io.FileNotFoundException: remote-connection.properties (No such file or directory)
(I have also tried #PropertySource("classpath:remote-connection.properties") and #PropertySource("remote-connection.properties"))
It works flawlessly if I place remote-connection.properties into src/main/resources, but I want that config file to be outside the resulting jar, being able to run it with
java -jar my-application.jar --spring.config.additional-location=file:/path/to/my/props/folder/,file:/path/to/another/props/folder/
What am I missing?
Thanks in advance.

Answer 1

Answering my own question.
Following this guide https://mkyong.com/spring/spring-propertysources-example/ I have changed my run args to
bootRun {
args = [
"--my.props.folder=/path/to/my/props/folder",
"--my.other.props.folder=/path/to/another/props/folder",
]
}
and loading props like this
#RestController
#PropertySource("file:${my.props.folder}/remote-connection.properties")
#PropertySource("file:${my.other.props.folder}/some-more.properties")
public class MyController {
#Value("${remote.ip.address}")
private String remoteIpAddress;
}
This way, it works!!