Function serverSideFlags

cmd/helm.go:508–523

serverSideFlags returns the --server-side flag(s) to forward to helm. The flag is Helm v4 only: - `helm upgrade` registers it as a string accepting "true", "false", "auto". - `helm template` registers it as a bool (default true); "auto" is rejected. The flag has no effect on manifest rendering in

(isHelmV4 bool, useUpgradeDryRun bool, serverSide string)

// for semantic correctness and so that helm-diff can be used as a drop-in
// wrapper around `helm upgrade` with the same flags.
func serverSideFlags(isHelmV4 bool, useUpgradeDryRun bool, serverSide string) []string {
	if !isHelmV4 {
		return nil
	}
	switch {
	case useUpgradeDryRun:
		// `helm upgrade`: forward all values including "auto".
		return []string{"--server-side=" + serverSide}
	case serverSide == envTrue || serverSide == envFalse:
		// `helm template`: forward only bool-compatible values.
		// "auto" is skipped — template's default (true) is reasonable.
		return []string{"--server-side=" + serverSide}
	default:
		return nil
	}
}