Fix examples by re-adding the no-arg config file builder. (#137)

Author: brendandburns

src/KubernetesClient/KubernetesClientConfiguration.ConfigFile.cs

@@ -3,10 +3,10 @@
 using System.Linq;
 using System.Runtime.InteropServices;
 using System.Security.Cryptography.X509Certificates;
-using System.Threading.Tasks;
+using System.Threading.Tasks;
 using k8s.Exceptions;
 using k8s.KubeConfigModels;
-
+
 namespace k8s
 {
     public partial class KubernetesClientConfiguration
@@ -29,7 +29,7 @@ public partial class KubernetesClientConfiguration
         /// </summary>
         /// <param name="masterUrl">kube api server endpoint</param>
         /// <param name="kubeconfigPath">Explicit file path to kubeconfig. Set to null to use the default file path</param>
-        public static KubernetesClientConfiguration BuildConfigFromConfigFile(string kubeconfigPath,
+        public static KubernetesClientConfiguration BuildConfigFromConfigFile(string kubeconfigPath = null,
             string currentContext = null, string masterUrl = null)
         {
             return BuildConfigFromConfigFile(new FileInfo(kubeconfigPath ?? KubeConfigDefaultLocation), null,
@@ -240,30 +240,30 @@ private void SetUserDetails(K8SConfiguration k8SConfig, Context activeContext)
                 throw new KubeConfigException(
                     $"User: {userDetails.Name} does not have appropriate auth credentials in kubeconfig");
             }
-        }
-
+        }
+
         /// <summary>
         ///     Loads entire Kube Config from default or explicit file path
         /// </summary>
         /// <param name="kubeconfigPath">Explicit file path to kubeconfig. Set to null to use the default file path</param>
-        /// <returns></returns>
-        public static async Task<K8SConfiguration> LoadKubeConfigAsync(string kubeconfigPath = null)
-        {
-            var fileInfo = new FileInfo(kubeconfigPath ?? KubeConfigDefaultLocation);
-
-            return await LoadKubeConfigAsync(fileInfo);
-        }
-
+        /// <returns></returns>
+        public static async Task<K8SConfiguration> LoadKubeConfigAsync(string kubeconfigPath = null)
+        {
+            var fileInfo = new FileInfo(kubeconfigPath ?? KubeConfigDefaultLocation);
+
+            return await LoadKubeConfigAsync(fileInfo);
+        }
+
         /// <summary>
         ///     Loads entire Kube Config from default or explicit file path
         /// </summary>
         /// <param name="kubeconfigPath">Explicit file path to kubeconfig. Set to null to use the default file path</param>
-        /// <returns></returns>
-        public static K8SConfiguration LoadKubeConfig(string kubeconfigPath = null)
-        {
-            return LoadKubeConfigAsync(kubeconfigPath).GetAwaiter().GetResult();
-        }
-        
+        /// <returns></returns>
+        public static K8SConfiguration LoadKubeConfig(string kubeconfigPath = null)
+        {
+            return LoadKubeConfigAsync(kubeconfigPath).GetAwaiter().GetResult();
+        }
+        
         // <summary>
         ///     Loads Kube Config
         /// </summary>
@@ -274,10 +274,10 @@ public static async Task<K8SConfiguration> LoadKubeConfigAsync(FileInfo kubeconf
             if (!kubeconfig.Exists)
             {
                 throw new KubeConfigException($"kubeconfig file not found at {kubeconfig.FullName}");
-            }
-
+            }
+
             using (var stream = kubeconfig.OpenRead())
-            {
+            {
                 return await Yaml.LoadFromStreamAsync<K8SConfiguration>(stream);
             }
         }
@@ -288,17 +288,17 @@ public static async Task<K8SConfiguration> LoadKubeConfigAsync(FileInfo kubeconf
         /// <param name="kubeconfig">Kube config file contents</param>
         /// <returns>Instance of the <see cref="K8SConfiguration"/> class</returns>
         public static K8SConfiguration LoadKubeConfig(FileInfo kubeconfig)
-        {
+        {
             return LoadKubeConfigAsync(kubeconfig).GetAwaiter().GetResult();
-        }
-
+        }
+
         // <summary>
         ///     Loads Kube Config
         /// </summary>
         /// <param name="kubeconfigStream">Kube config file contents stream</param>
         /// <returns>Instance of the <see cref="K8SConfiguration"/> class</returns>
         public static async Task<K8SConfiguration> LoadKubeConfigAsync(Stream kubeconfigStream)
-        {
+        {
             return await Yaml.LoadFromStreamAsync<K8SConfiguration>(kubeconfigStream);
         }
 
@@ -308,7 +308,7 @@ public static async Task<K8SConfiguration> LoadKubeConfigAsync(Stream kubeconfig
         /// <param name="kubeconfig">Kube config file contents stream</param>
         /// <returns>Instance of the <see cref="K8SConfiguration"/> class</returns>
         public static K8SConfiguration LoadKubeConfig(Stream kubeconfigStream)
-        {
+        {
             return LoadKubeConfigAsync(kubeconfigStream).GetAwaiter().GetResult();
         }
     }