Handle 3-alpha based on review comments

Signed-off-by: jesus m. rodriguez <jesusr@redhat.com>

pkg/cli/cli.go

@@ -27,9 +27,9 @@ import (
 	"github.com/spf13/pflag"
 
 	"sigs.k8s.io/kubebuilder/v3/pkg/config"
-	"sigs.k8s.io/kubebuilder/v3/pkg/config/store"
 	yamlstore "sigs.k8s.io/kubebuilder/v3/pkg/config/store/yaml"
 	"sigs.k8s.io/kubebuilder/v3/pkg/machinery"
+	"sigs.k8s.io/kubebuilder/v3/pkg/model/stage"
 	"sigs.k8s.io/kubebuilder/v3/pkg/plugin"
 )
 
@@ -146,16 +146,11 @@ func (c *CLI) buildCmd() error {
 	c.cmd = c.newRootCmd()
 
 	// Get project version and plugin keys.
-	err := c.getInfo()
-	if err != nil {
-		if le, ok := err.(store.LoadError); ok {
-			// ignore UnsupportedVersionError, I'd prefer to verify a specific type
-			// of error instead of the string, but alas LoadError consists wrapped
-			// errors.
-			if !strings.Contains(le.Err.Error(), "unable to create config for version") {
-				return err
-			}
-		}
+	// Ignore 3-alpha error
+	switch err := c.getInfo(); {
+	case err == nil:
+	case !errors.Is(err, config.UnsupportedVersionError{Version: config.Version{Number: 3, Stage: stage.Alpha}}):
+		return err
 	}
 
 	// Resolve plugins for project version and plugin keys.

pkg/config/store/yaml/store.go

@@ -90,7 +90,7 @@ func (s *yamlStore) LoadFrom(path string) error {
 	var cfg config.Config
 	cfg, err = config.New(versioned.Version)
 	if err != nil {
-		return store.LoadError{Err: fmt.Errorf("unable to create config for version %q: %w", versioned.Version, err)}
+		return store.LoadError{Err: config.UnsupportedVersionError{Version: versioned.Version}}
 	}
 
 	// Unmarshal the file content