Function cmdGetDryRunFlagStrategy

pkg/cmd/helpers.go:45–83

Determine the `action.DryRunStrategy` given -dry-run= ` flag (or absence of) Legacy usage of the flag: boolean values, and `--dry-run` (without value) are supported, and log warnings emitted

(cmd *cobra.Command, isTemplate bool)

// Determine the `action.DryRunStrategy` given -dry-run=<value>` flag (or absence of)
// Legacy usage of the flag: boolean values, and `--dry-run` (without value) are supported, and log warnings emitted
func cmdGetDryRunFlagStrategy(cmd *cobra.Command, isTemplate bool) (action.DryRunStrategy, error) {

	f := cmd.Flag("dry-run")
	v := f.Value.String()

	switch v {
	case f.NoOptDefVal:
		slog.Warn(`--dry-run is deprecated and should be replaced with '--dry-run=client'`)
		return action.DryRunClient, nil
	case string(action.DryRunClient):
		return action.DryRunClient, nil
	case string(action.DryRunServer):
		return action.DryRunServer, nil
	case string(action.DryRunNone):
		if isTemplate {
			// Special case hack for `helm template`, which is always a dry run
			return action.DryRunNone, fmt.Errorf(`invalid dry-run value (%q). Must be "server" or "client"`, v)
		}
		return action.DryRunNone, nil
	}

	b, err := strconv.ParseBool(v)
	if err != nil {
		return action.DryRunNone, fmt.Errorf(`invalid dry-run value (%q). Must be "none", "server", or "client"`, v)
	}

	if isTemplate && !b {
		// Special case for `helm template`, which is always a dry run
		return action.DryRunNone, fmt.Errorf(`invalid dry-run value (%q). Must be "server" or "client"`, v)
	}

	result := action.DryRunNone
	if b {
		result = action.DryRunClient
	}
	slog.Warn(fmt.Sprintf(`boolean '--dry-run=%v' flag is deprecated and must be replaced with '--dry-run=%s'`, v, result))

	return result, nil
}