Add --dry option to view the generated spec without saving (#1504)

pkg/fission-cli/cmd/httptrigger/create.go

@@ -22,7 +22,7 @@ import (
 	"strings"
 
 	"github.com/pkg/errors"
-	"github.com/satori/go.uuid"
+	uuid "github.com/satori/go.uuid"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 
 	fv1 "github.com/fission/fission/pkg/apis/core/v1"
@@ -157,11 +157,16 @@ func (opts *CreateSubCommand) complete(input cli.Input) error {
 
 func (opts *CreateSubCommand) run(input cli.Input) error {
 	// if we're writing a spec, don't call the API
+	// save to spec file or display the spec to console
+	if input.Bool(flagkey.SpecDry) {
+		return spec.SpecDry(*opts.trigger)
+	}
+
 	if input.Bool(flagkey.SpecSave) {
 		specFile := fmt.Sprintf("route-%v.yaml", opts.trigger.ObjectMeta.Name)
 		err := spec.SpecSave(*opts.trigger, specFile)
 		if err != nil {
-			return errors.Wrap(err, "error creating HTTP trigger spec")
+			return errors.Wrap(err, "error saving HTTP trigger spec")
 		}
 		return nil
 	}