quarkus: bootstrap config with field does not pick up QUARKUS_CONFIG_LOCATIONS files

Describe the bug

If I define a property in a file referenced by QUARKUS_CONFIG_LOCATIONS , it will not be picked up if part of a config object with phase BOOTSTRAP. it works fine with RUN_TIME.

Expected behavior

The value should be taken into account as if it was defined in the classpath’s application.properties.

Actual behavior

The value is ignored.

How to Reproduce?

Define the following config object in an extension:

@ConfigRoot(name = "hello", phase = ConfigPhase.BOOTSTRAP)
public class HelloConfig {

    /**
     * doc
     */
    @ConfigItem(name = "map")
    public Map<String, MapConfig> map;

    @Override
    public String toString() {
        return "HelloConfig{" + "map=" + map + '}';
    }

    @ConfigGroup
    public static class MapConfig {

        /**
         * doc
         */
        @ConfigItem(name = ConfigItem.PARENT)
        String value;

        public MapConfig(String value) {
            this.value = value;
        }

        public MapConfig() {
            value = "";
        }

        @Override
        public String toString() {
            return "MapConfig{" + "value=" + value + '}';
        }
    }
}

Create a recorder:

@Recorder
public class HelloRecorder {

    private final HelloConfig config;

    public HelloRecorder(HelloConfig config) {
        this.config = config;
    }

    public void sayHello(String name) {
        System.out.println("==> Hello" + name+" with config " + config);
    }
}

And a build step:

    @Record(ExecutionTime.RUNTIME_INIT)
    @BuildStep
    public void helloBuildStep(HelloRecorder recorder) {
        recorder.sayHello("World");
    }

In the src/main/resources/application.yaml:

quarkus:
  hello:
    map:
      mytest: foo

In a directory create a .env with:

QUARKUS_CONFIG_LOCATIONS=base-application.properties

And create base-application.properties with:

# ordinal between application.properties in classpath (250) and ./config/application.properties (260)
config_ordinal=255

quarkus.hello.map.mytest=bar

Compile and start the application:

$ java  -jar ../target/quarkus-app/quarkus-run.jar
==> HelloWorld with config HelloConfig{map={mytest=MapConfig{value=foo}}}

The value foo comes from the src/main/resources/application.yaml, which means the base-application.properties has been ignored.

Now change the config phase to RUN_TIME:

@ConfigRoot(name = "hello", phase = ConfigPhase.RUN_TIME)
public class HelloConfig {

Compile and relaunch:

$ java  -jar ../target/quarkus-app/quarkus-run.jar
==> HelloWorld with config HelloConfig{map={mytest=MapConfig{value=bar}}}

Now the bar value is correctly picked up. I have tried also with a normal field (i.e. not a Map), and the behavior is the same. So it is essentially related to boostrap config vs runtime.

May also be related to https://github.com/quarkusio/quarkus/issues/24463 see https://quarkusio.zulipchat.com/#narrow/stream/294206-smallrye/topic/Map.20config.20env.20variable.20override cc @radcortez

Output of uname -a or ver

MINGW64_NT-10.0-19042 DEVPC028554 3.1.4-340.x86_64 2020-05-19 12:55 UTC x86_64 Msys

Output of java -version

OpenJDK 64-Bit Server VM (build 17.0.2+8-86, mixed mode, sharing)

GraalVM version (if different from Java)

No response

Quarkus version or git rev

2.7.3.Final

Build tool (ie. output of mvnw --version or gradlew --version)

Apache Maven 3.8.2 (ea98e05a04480131370aa0c110b8c54cf726c06f)

Additional information

No response