fix: adding a method to inline creating / editing the config

closes #5353

Signed-off-by: Steve Hawkins <shawkins@redhat.com>

CHANGELOG.md

@@ -7,6 +7,7 @@
 
 #### Improvements
 * Fix #5701: Owner reference validity check regarding scope and namespace
+* Fix #5353: added KubernetesClientBuilder.editOrNewConfig
 
 #### Dependency Upgrade
 

kubernetes-client-api/src/main/java/io/fabric8/kubernetes/client/KubernetesClientBuilder.java

@@ -158,4 +158,23 @@ public KubernetesClientBuilder withHttpClientBuilderConsumer(Consumer<HttpClient
     return this;
   }
 
+  public class ConfigNested extends ConfigFluent<ConfigNested> {
+
+    private ConfigBuilder builder;
+
+    private ConfigNested() {
+      this.builder = new ConfigBuilder(this, config);
+    }
+
+    public KubernetesClientBuilder endConfig() {
+      config = this.builder.build();
+      return KubernetesClientBuilder.this;
+    }
+
+  }
+
+  public ConfigNested editOrNewConfig() {
+    return new ConfigNested();
+  }
+
 }

kubernetes-client-api/src/test/java/io/fabric8/kubernetes/client/KubernetesClientBuilderTest.java

@@ -16,6 +16,7 @@
 
 package io.fabric8.kubernetes.client;
 
+import io.fabric8.kubernetes.client.KubernetesClientBuilder.ConfigNested;
 import io.fabric8.kubernetes.client.http.HttpClient;
 import io.fabric8.kubernetes.client.http.HttpClient.Factory;
 import org.junit.jupiter.api.Test;
@@ -37,6 +38,16 @@ void testHttpClientConfiguration() {
     Mockito.verify(mockBuilder).proxyAuthorization("something");
   }
 
+  @Test
+  void testConfigNested() {
+    KubernetesClientBuilder builder = new KubernetesClientBuilder(null);
+    builder.withConfig(new ConfigBuilder().withWatchReconnectLimit(600).build());
+    builder.editOrNewConfig().withApiVersion("x.y").endConfig();
+    ConfigNested configNested = builder.editOrNewConfig();
+    assertEquals("x.y", configNested.getApiVersion());
+    assertEquals(600, configNested.getWatchReconnectLimit());
+  }
+
   /**
    * This test is only to check null returned by Thread.currentThread().getContextClassLoader would be handled properly.
    * For this unit test, since io.fabric8.kubernetes.client.impl.KubernetesClientImpl is not loaded in the class path,