refactor main: Call kubectl individually per resource set

Instead of passing the rendered output of all resource sets to kubectl
simultaneously, build upon the previous commit and pass resource sets
individually to new instances of kubectl.

This resolves #51

main.go

@@ -130,43 +130,50 @@ func createCommand() {
 	}
 }
 
-func loadContextAndResources(file *string) (*context.Context, *[]string) {
+func loadContextAndResources(file *string) (*context.Context, *[]templater.RenderedResourceSet) {
 	ctx, err := context.LoadContextFromFile(*file)
 	if err != nil {
 		app.Fatalf("Error loading context: %v\n", err)
 	}
 
-	resources, err := templater.LoadAndPrepareTemplates(includes, excludes, ctx)
+	resources, err := templater.LoadAndApplyTemplates(includes, excludes, ctx)
 	if err != nil {
 		app.Fatalf("Error templating resource sets: %v\n", err)
 	}
 
 	return ctx, &resources
 }
 
-func runKubectlWithResources(c *context.Context, kubectlArgs *[]string, resources *[]string) error {
+func runKubectlWithResources(c *context.Context, kubectlArgs *[]string, resourceSets *[]templater.RenderedResourceSet) error {
 	args := append(*kubectlArgs, fmt.Sprintf("--context=%s", c.Name))
 
-	kubectl := exec.Command("kubectl", args...)
+	for _, resourceSet := range *resourceSets {
+		kubectl := exec.Command("kubectl", args...)
 
-	stdin, err := kubectl.StdinPipe()
-	if err != nil {
-		return meep.New(&KubeCtlError{}, meep.Cause(err))
-	}
+		stdin, err := kubectl.StdinPipe()
+		if err != nil {
+			return meep.New(&KubeCtlError{}, meep.Cause(err))
+		}
 
-	kubectl.Stdout = os.Stdout
-	kubectl.Stderr = os.Stderr
+		kubectl.Stdout = os.Stdout
+		kubectl.Stderr = os.Stderr
 
-	if err = kubectl.Start(); err != nil {
-		return meep.New(&KubeCtlError{}, meep.Cause(err))
-	}
+		if err = kubectl.Start(); err != nil {
+			return meep.New(&KubeCtlError{}, meep.Cause(err))
+		}
 
-	for _, r := range *resources {
-		fmt.Fprintln(stdin, r)
+		for _, r := range resourceSet.Resources {
+			fmt.Printf("Passing file %s/%s to kubectl", resourceSet.Name, r.Filename)
+			fmt.Fprintln(stdin, r.Rendered)
+		}
+		stdin.Close()
+
+		if err = kubectl.Wait(); err != nil {
+			return err
+		}
 	}
-	stdin.Close()
 
-	return kubectl.Wait()
+	return nil
 }
 
 func failWithKubectlError(err error) {