re-add ConfigSourceFactory from 64d0d5f

to be replaced, once there is an official way to access higher-order config (see eclipse/microprofile-config#470)

backend/src/main/java/org/cryptomator/hub/config/HubConfig.java

@@ -16,15 +16,13 @@ public class HubConfig implements ConfigSource {
 
 	private static final Logger LOG = Logger.getLogger(HubConfig.class);
 	private static final String HUB_CONFIGSOURCE_NAME = "HubConfig";
-	private static final String HUB_CONFIGPATH_PROPERTY_KEY = "hub.config.path";
 
 	private final HubConfigPersistence persistence;
 	private final Properties config;
 
-	public HubConfig() {
-		var configPath = System.getProperty(HUB_CONFIGPATH_PROPERTY_KEY);
+	public HubConfig(String configPath) {
 		if (configPath == null) {
-			throw new IllegalStateException("Property " + HUB_CONFIGPATH_PROPERTY_KEY + " not set.");
+			throw new IllegalStateException("Hub config path not set.");
 		}
 
 		LOG.info("Hub config persists to " + configPath);

backend/src/main/java/org/cryptomator/hub/config/HubConfigSourceFactory.java

@@ -0,0 +1,19 @@
+package org.cryptomator.hub.config;
+
+import io.smallrye.config.ConfigSourceContext;
+import io.smallrye.config.ConfigSourceFactory;
+import org.eclipse.microprofile.config.spi.ConfigSource;
+
+import java.util.List;
+
+public class HubConfigSourceFactory implements ConfigSourceFactory {
+
+	private static final String HUBCONFIG_PROPERTY_KEY = "hub.config.path";
+
+	@Override
+	public Iterable<ConfigSource> getConfigSources(ConfigSourceContext configSourceContext) {
+		var configPath = configSourceContext.getValue(HUBCONFIG_PROPERTY_KEY);
+		var hubConfig = new HubConfig(configPath.getValue());
+		return List.of(hubConfig);
+	}
+}

backend/src/main/resources/META-INF/services/io.smallrye.config.ConfigSourceFactory

@@ -0,0 +1 @@
+org.cryptomator.hub.config.HubConfigSourceFactory

backend/src/main/resources/application.properties

@@ -8,6 +8,9 @@ quarkus.http.port=9090
 quarkus.oidc.application-type=service
 quarkus.oidc.client-id=cryptomator-hub
 
+hub.config.path=hub.properties
+%test.hub.config.path=target/hub-test.properties
+
 # Keycloak dev service
 %dev.quarkus.keycloak.devservices.enabled=true
 %dev.quarkus.keycloak.devservices.create-realm=false