Implement OCIRepository commands

Signed-off-by: Stefan Prodan <stefan.prodan@gmail.com>

internal/flags/kustomization_source.go

@@ -25,7 +25,7 @@ import (
 	"github.com/fluxcd/flux2/internal/utils"
 )
 
-var supportedKustomizationSourceKinds = []string{sourcev1.GitRepositoryKind, sourcev1.BucketKind}
+var supportedKustomizationSourceKinds = []string{sourcev1.OCIRepositoryKind, sourcev1.GitRepositoryKind, sourcev1.BucketKind}
 
 type KustomizationSource struct {
 	Kind      string

internal/oci/build.go

@@ -28,7 +28,7 @@ import (
 
 // Build archives the given directory as a tarball to the given local path.
 // While archiving, any environment specific data (for example, the user and group name) is stripped from file headers.
-func Build(artifactPath, sourceDir string) error {
+func Build(artifactPath, sourceDir string) (err error) {
 	if f, err := os.Stat(sourceDir); os.IsNotExist(err) || !f.IsDir() {
 		return fmt.Errorf("invalid source dir path: %s", sourceDir)
 	}