Delegate config checks to the config model

Signed-off-by: Adrian Orive <[email protected]>

cmd/api.go

@@ -163,41 +163,15 @@ func (o *apiOptions) validate(c *config.Config) error {
 
 	// In case we want to scaffold a resource API we need to do some checks
 	if o.doResource {
-		// Skip the following check for v1 as resources aren't tracked
-		if !c.IsV1() {
-			// Check that resource doesn't exist or flag force was set
-			if !o.force {
-				resourceExists := false
-				for _, r := range c.Resources {
-					if r.Group == o.resource.Group &&
-						r.Version == o.resource.Version &&
-						r.Kind == o.resource.Kind {
-						resourceExists = true
-						break
-					}
-				}
-				if resourceExists {
-					return errors.New("API resource already exists")
-				}
-			}
+		// Check that resource doesn't exist or flag force was set
+		if !o.force && c.HasResource(o.resource.GVK()) {
+			return errors.New("API resource already exists")
 		}
 
-		// The following check is v2 specific as multi-group isn't enabled by default
-		if c.IsV2() {
-			// Check the group is the same for single-group projects
-			if !c.MultiGroup {
-				validGroup := true
-				for _, existingGroup := range c.ResourceGroups() {
-					if !strings.EqualFold(o.resource.Group, existingGroup) {
-						validGroup = false
-						break
-					}
-				}
-				if !validGroup {
-					return fmt.Errorf("multiple groups are not allowed by default, to enable multi-group visit %s",
-						"kubebuilder.io/migration/multi-group.html")
-				}
-			}
+		// Check that the provided group can be added to the project
+		if c.IsV2() && !c.MultiGroup && len(c.Resources) != 0 && !c.HasGroup(o.resource.Group) {
+			return fmt.Errorf("multiple groups are not allowed by default, to enable multi-group visit %s",
+				"kubebuilder.io/migration/multi-group.html")
 		}
 	}
 

pkg/model/config/config.go

@@ -16,6 +16,10 @@ limitations under the License.
 
 package config
 
+import (
+	"strings"
+)
+
 // Scaffolding versions
 const (
 	Version1 = "1"
@@ -51,29 +55,8 @@ func (config Config) IsV2() bool {
 	return config.Version == Version2
 }
 
-// ResourceGroups returns unique groups of scaffolded resources in the project
-func (config Config) ResourceGroups() []string {
-	groupSet := map[string]struct{}{}
-	for _, r := range config.Resources {
-		groupSet[r.Group] = struct{}{}
-	}
-
-	groups := make([]string, 0, len(groupSet))
-	for g := range groupSet {
-		groups = append(groups, g)
-	}
-
-	return groups
-}
-
 // HasResource returns true if API resource is already tracked
-// NOTE: this works only for v2, since in v1 resources are not tracked
 func (config Config) HasResource(target GVK) bool {
-	// Short-circuit v1
-	if config.Version == Version1 {
-		return false
-	}
-
 	// Return true if the target resource is found in the tracked resources
 	for _, r := range config.Resources {
 		if r.isEqualTo(target) {
@@ -87,10 +70,10 @@ func (config Config) HasResource(target GVK) bool {
 
 // AddResource appends the provided resource to the tracked ones
 // It returns if the configuration was modified
-// NOTE: this works only for v2, since in v1 resources are not tracked
+// NOTE: in v1 resources are not tracked, so we return false
 func (config *Config) AddResource(gvk GVK) bool {
 	// Short-circuit v1
-	if config.Version == Version1 {
+	if config.IsV1() {
 		return false
 	}
 
@@ -104,6 +87,19 @@ func (config *Config) AddResource(gvk GVK) bool {
 	return true
 }
 
+// HasGroup returns true if group is already tracked
+func (config Config) HasGroup(group string) bool {
+	// Return true if the target group is found in the tracked resources
+	for _, r := range config.Resources {
+		if strings.EqualFold(group, r.Group) {
+			return true
+		}
+	}
+
+	// Return false otherwise
+	return false
+}
+
 // GVK contains information about scaffolded resources
 type GVK struct {
 	Group   string `json:"group,omitempty"`