Added initial implementation to detect changes

pkg/kube/client.go

@@ -0,0 +1,29 @@
+package kube
+
+import (
+	"os"
+
+	"k8s.io/client-go/kubernetes"
+	"k8s.io/client-go/rest"
+	"k8s.io/client-go/tools/clientcmd"
+)
+
+// gets the client for k8s, if ~/.kube/config exists so get that config else incluster config
+func GetClient() (*kubernetes.Clientset, error) {
+	var config *rest.Config
+	var err error
+	kubeconfigPath := os.Getenv("KUBECONFIG")
+	if kubeconfigPath == "" {
+		kubeconfigPath = os.Getenv("HOME") + "/.kube/config"
+	}
+	//If file exists so use that config settings
+	if _, err := os.Stat(kubeconfigPath); err == nil {
+		config, err = clientcmd.BuildConfigFromFlags("", kubeconfigPath)
+	} else { //Use Incluster Configuration
+		config, err = rest.InClusterConfig()
+	}
+	if err != nil {
+		return nil, err
+	}
+	return kubernetes.NewForConfig(config)
+}

pkg/kube/resourcemapper.go

@@ -0,0 +1,26 @@
+package kube
+
+import (
+	"k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/runtime"
+)
+
+const (
+	DefaultResource = "default"
+)
+
+// MapToRuntimeObject maps the resource type string to the actual resource
+func MapToRuntimeObject(resourceType string) runtime.Object {
+	rType, ok := ResourceMap[resourceType]
+	if !ok {
+		return ResourceMap[DefaultResource]
+	}
+	return rType
+}
+
+// ResourceMap are resources from where changes are going to be detected
+var ResourceMap = map[string]runtime.Object{
+	"configMaps": &v1.ConfigMap{},
+	"secrets": &v1.Secret{},
+	"default": nil,
+}