Added ignorenotfound flag for all resources' deletion (#2293)

Treat \"resource not found\" as a successful delete if ignorenotfound flag passed while deletion of Fission resource.

pkg/fission-cli/cmd/kubewatch/command.go

@@ -44,7 +44,7 @@ func Commands() *cobra.Command {
 	}
 	wrapper.SetFlags(deleteCmd, flag.FlagSet{
 		Required: []flag.Flag{flag.KwFnName},
-		Optional: []flag.Flag{flag.NamespaceTrigger},
+		Optional: []flag.Flag{flag.NamespaceTrigger, flag.IgnoreNotFound},
 	})
 
 	listCmd := &cobra.Command{

pkg/fission-cli/cmd/kubewatch/delete.go

@@ -25,6 +25,7 @@ import (
 	"github.com/fission/fission/pkg/fission-cli/cliwrapper/cli"
 	"github.com/fission/fission/pkg/fission-cli/cmd"
 	flagkey "github.com/fission/fission/pkg/fission-cli/flag/key"
+	"github.com/fission/fission/pkg/fission-cli/util"
 )
 
 type DeleteSubCommand struct {
@@ -57,6 +58,9 @@ func (opts *DeleteSubCommand) run(input cli.Input) error {
 		Namespace: opts.namespace,
 	})
 	if err != nil {
+		if input.Bool(flagkey.IgnoreNotFound) && util.IsNotFound(err) {
+			return nil
+		}
 		return errors.Wrap(err, "error deleting kubewatch")
 	}