add support to scaffold oci helm registry charts

Signed-off-by: Adam D. Cornett <adc@redhat.com>

Author: acornett21

internal/plugins/helm/v1/api.go

@@ -115,8 +115,8 @@ func (p *createAPISubcommand) UpdateMetadata(cliMeta plugin.CLIMetadata, subcmdM
 func (p *createAPISubcommand) BindFlags(fs *pflag.FlagSet) {
 	fs.SortFlags = false
 
-	fs.StringVar(&p.options.chartOptions.Chart, helmChartFlag, "", "helm chart")
-	fs.StringVar(&p.options.chartOptions.Repo, helmChartRepoFlag, "", "helm chart repository")
+	fs.StringVar(&p.options.chartOptions.Chart, helmChartFlag, "", "helm chart, if using an OCI registry, this needs to contain the entire chart address, just like the helm cli")
+	fs.StringVar(&p.options.chartOptions.Repo, helmChartRepoFlag, "", "helm chart repository, only provide for non-OCI repositories")
 	fs.StringVar(&p.options.chartOptions.Version, helmChartVersionFlag, "", "helm chart version (default: latest)")
 
 	fs.StringVar(&p.options.CRDVersion, crdVersionFlag, defaultCrdVersion, "crd version to generate")

internal/plugins/helm/v1/chartutil/chart.go

@@ -27,6 +27,7 @@ import (
 	"helm.sh/helm/v3/pkg/cli"
 	"helm.sh/helm/v3/pkg/downloader"
 	"helm.sh/helm/v3/pkg/getter"
+	"helm.sh/helm/v3/pkg/registry"
 	"helm.sh/helm/v3/pkg/repo"
 )
 
@@ -126,11 +127,19 @@ func LoadChart(opts Options) (*chart.Chart, error) {
 func downloadChart(destDir string, opts Options) (string, error) {
 	settings := cli.New()
 	getters := getter.All(settings)
+
+	// Create registry client for OCI registry support
+	registryClient, err := registry.NewClient()
+	if err != nil {
+		return "", fmt.Errorf("failed to create registry client: %w", err)
+	}
+
 	c := downloader.ChartDownloader{
 		Out:              os.Stderr,
 		Getters:          getters,
 		RepositoryConfig: settings.RepositoryConfig,
 		RepositoryCache:  settings.RepositoryCache,
+		RegistryClient:   registryClient,
 	}
 
 	if opts.Repo != "" {
@@ -182,13 +191,20 @@ func fetchChartDependencies(chartPath string) error {
 	settings := cli.New()
 	getters := getter.All(settings)
 
+	// Create registry client for OCI registry support
+	registryClient, err := registry.NewClient()
+	if err != nil {
+		return fmt.Errorf("failed to create registry client: %w", err)
+	}
+
 	out := &bytes.Buffer{}
 	man := &downloader.Manager{
 		Out:              out,
 		ChartPath:        chartPath,
 		Getters:          getters,
 		RepositoryConfig: settings.RepositoryConfig,
 		RepositoryCache:  settings.RepositoryCache,
+		RegistryClient:   registryClient,
 	}
 	if err := man.Build(); err != nil {
 		fmt.Println(out.String())