refactor(helm): helm binary to sdk refactor [r8s-229] (#463)

Co-authored-by: stevensbkang <skan070@gmail.com>

pkg/libhelm/sdk/show.go

@@ -0,0 +1,131 @@
+package sdk
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/pkg/errors"
+	"github.com/portainer/portainer/pkg/libhelm/options"
+	"github.com/rs/zerolog/log"
+	"helm.sh/helm/v3/pkg/action"
+)
+
+var errRequiredShowOptions = errors.New("chart, repo and output format are required")
+
+// Show implements the HelmPackageManager interface by using the Helm SDK to show chart information.
+// It supports showing chart values, readme, and chart details based on the provided ShowOptions.
+func (hspm *HelmSDKPackageManager) Show(showOpts options.ShowOptions) ([]byte, error) {
+	if showOpts.Chart == "" || showOpts.Repo == "" || showOpts.OutputFormat == "" {
+		log.Error().
+			Str("context", "HelmClient").
+			Str("chart", showOpts.Chart).
+			Str("repo", showOpts.Repo).
+			Str("output_format", string(showOpts.OutputFormat)).
+			Msg("Missing required show options")
+		return nil, errRequiredShowOptions
+	}
+
+	log.Debug().
+		Str("context", "HelmClient").
+		Str("chart", showOpts.Chart).
+		Str("repo", showOpts.Repo).
+		Str("output_format", string(showOpts.OutputFormat)).
+		Msg("Showing chart information")
+
+	// Initialize action configuration
+	actionConfig := new(action.Configuration)
+	if err := actionConfig.Init(nil, "", "", func(format string, v ...interface{}) {}); err != nil {
+		log.Error().
+			Str("context", "HelmClient").
+			Err(err).
+			Msg("Failed to initialize helm configuration")
+		return nil, fmt.Errorf("failed to initialize helm configuration: %w", err)
+	}
+
+	// Create temporary directory for chart download
+	tempDir, err := os.MkdirTemp("", "helm-show-*")
+	if err != nil {
+		log.Error().
+			Str("context", "HelmClient").
+			Err(err).
+			Msg("Failed to create temp directory")
+		return nil, fmt.Errorf("failed to create temp directory: %w", err)
+	}
+	defer os.RemoveAll(tempDir)
+
+	// Create showClient action
+	showClient, err := initShowClient(actionConfig, showOpts)
+	if err != nil {
+		log.Error().
+			Str("context", "HelmClient").
+			Err(err).
+			Msg("Failed to initialize helm show client")
+		return nil, fmt.Errorf("failed to initialize helm show client: %w", err)
+	}
+
+	// Locate and load the chart
+	log.Debug().
+		Str("context", "HelmClient").
+		Str("chart", showOpts.Chart).
+		Str("repo", showOpts.Repo).
+		Msg("Locating chart")
+
+	chartPath, err := showClient.ChartPathOptions.LocateChart(showOpts.Chart, hspm.settings)
+	if err != nil {
+		log.Error().
+			Str("context", "HelmClient").
+			Str("chart", showOpts.Chart).
+			Str("repo", showOpts.Repo).
+			Err(err).
+			Msg("Failed to locate chart")
+		return nil, fmt.Errorf("failed to locate chart: %w", err)
+	}
+
+	// Get the output based on the requested format
+	output, err := showClient.Run(chartPath)
+	if err != nil {
+		log.Error().
+			Str("context", "HelmClient").
+			Str("chart_path", chartPath).
+			Str("output_format", string(showOpts.OutputFormat)).
+			Err(err).
+			Msg("Failed to show chart info")
+		return nil, fmt.Errorf("failed to show chart info: %w", err)
+	}
+
+	log.Debug().
+		Str("context", "HelmClient").
+		Str("chart", showOpts.Chart).
+		Int("output_size", len(output)).
+		Msg("Successfully retrieved chart information")
+
+	return []byte(output), nil
+}
+
+// initShowClient initializes the show client with the given options
+// and return the show client.
+func initShowClient(actionConfig *action.Configuration, showOpts options.ShowOptions) (*action.Show, error) {
+	showClient := action.NewShowWithConfig(action.ShowAll, actionConfig)
+	showClient.ChartPathOptions.RepoURL = showOpts.Repo
+	showClient.ChartPathOptions.Version = "" // Latest version
+
+	// Set output type based on ShowOptions
+	switch showOpts.OutputFormat {
+	case options.ShowAll:
+		showClient.OutputFormat = action.ShowAll
+	case options.ShowChart:
+		showClient.OutputFormat = action.ShowChart
+	case options.ShowValues:
+		showClient.OutputFormat = action.ShowValues
+	case options.ShowReadme:
+		showClient.OutputFormat = action.ShowReadme
+	default:
+		log.Error().
+			Str("context", "HelmClient").
+			Str("output_format", string(showOpts.OutputFormat)).
+			Msg("Unsupported output format")
+		return nil, fmt.Errorf("unsupported output format: %s", showOpts.OutputFormat)
+	}
+
+	return showClient, nil
+}