🐛 regression - extracommands require a valid PROJECT file again

* Handle failing on 3-alpha configs
* Set project version to stable version if the it is registered
* Added IsRegistered command to registry
* Add unit test for buildCmd
* Add unit test for IsRegistered
* Fix typo in test name: resgitry_test -> registry_test

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

pkg/cli/cli.go

@@ -29,6 +29,7 @@ import (
 	"sigs.k8s.io/kubebuilder/v3/pkg/config"
 	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"
 )
 
@@ -144,8 +145,21 @@ func newCLI(options ...Option) (*CLI, error) {
 func (c *CLI) buildCmd() error {
 	c.cmd = c.newRootCmd()
 
+	var uve config.UnsupportedVersionError
+
 	// Get project version and plugin keys.
-	if err := c.getInfo(); err != nil {
+	switch err := c.getInfo(); {
+	case err == nil:
+	case errors.As(err, &uve) && uve.Version.Compare(config.Version{Number: 3, Stage: stage.Alpha}) == 0:
+		// Check if the corresponding stable version exists, set c.projectVersion and break
+		stableVersion := config.Version{
+			Number: uve.Version.Number,
+		}
+		if config.IsRegistered(stableVersion) {
+			// Use the stableVersion
+			c.projectVersion = stableVersion
+		}
+	default:
 		return err
 	}
 

pkg/cli/cli_test.go

@@ -32,6 +32,7 @@ import (
 	cfgv2 "sigs.k8s.io/kubebuilder/v3/pkg/config/v2"
 	cfgv3 "sigs.k8s.io/kubebuilder/v3/pkg/config/v3"
 	"sigs.k8s.io/kubebuilder/v3/pkg/machinery"
+	"sigs.k8s.io/kubebuilder/v3/pkg/model/stage"
 	"sigs.k8s.io/kubebuilder/v3/pkg/plugin"
 	goPluginV3 "sigs.k8s.io/kubebuilder/v3/pkg/plugins/golang/v3"
 )
@@ -91,6 +92,40 @@ var _ = Describe("CLI", func() {
 		}
 	})
 
+	Context("buildCmd", func() {
+		BeforeEach(func() {
+			projectFile := `domain: zeusville.com
+layout: go.kubebuilder.io/v3
+projectName: demo-zeus-operator
+repo: github.com/jmrodri/demo-zeus-operator
+resources:
+- crdVersion: v1
+  group: test
+  kind: Test
+  version: v1
+version: 3-alpha
+plugins:
+  manifests.sdk.operatorframework.io/v2: {}
+`
+			f, err := c.fs.FS.Create("PROJECT")
+			Expect(err).To(Not(HaveOccurred()))
+
+			_, err = f.WriteString(projectFile)
+			Expect(err).To(Not(HaveOccurred()))
+		})
+
+		When("reading a 3-alpha config", func() {
+			It("should succeed and set the projectVersion", func() {
+				err := c.buildCmd()
+				Expect(err).To(Not(HaveOccurred()))
+				Expect(c.projectVersion.Compare(
+					config.Version{
+						Number: 3,
+						Stage:  stage.Stable})).To(Equal(0))
+			})
+		})
+	})
+
 	// TODO: test CLI.getInfoFromConfigFile using a mock filesystem
 
 	Context("getInfoFromConfig", func() {

pkg/config/registry.go

@@ -25,6 +25,12 @@ func Register(version Version, constructor func() Config) {
 	registry[version] = constructor
 }
 
+// IsRegistered returns true if the given version has been registered through Register
+func IsRegistered(version Version) bool {
+	_, ok := registry[version]
+	return ok
+}
+
 // New creates Config instances from the previously registered implementations through Register
 func New(version Version) (Config, error) {
 	if constructor, exists := registry[version]; exists {

pkg/config/resgistry_test.go → pkg/config/registry_test.go

@@ -39,6 +39,16 @@ var _ = Describe("registry", func() {
 		})
 	})
 
+	Context("IsRegistered", func() {
+		It("should return true for registered constructors", func() {
+			Register(version, f)
+			Expect(IsRegistered(version)).To(BeTrue())
+		})
+		It("should fail for unregistered constructors", func() {
+			Expect(IsRegistered(version)).To(BeFalse())
+		})
+	})
+
 	Context("New", func() {
 		It("should use the registered constructors", func() {
 			registry[version] = f