Feature/import export encryption (#1533)

Add option to encrypt repository exports with a password and add possibility to decrypt them on repository import. Also make the repository export asynchronous. This implies that the repository export will be created on the server and can be downloaded multiple times. The repository export will be deleted automatically 10 days after creation.

scm-ui/ui-webapp/src/repos/containers/EditRepo.tsx

@@ -25,10 +25,9 @@ import React, { FC } from "react";
 import { Redirect, useRouteMatch } from "react-router-dom";
 import RepositoryForm from "../components/form";
 import { Repository } from "@scm-manager/ui-types";
-import { ErrorNotification, Subtitle } from "@scm-manager/ui-components";
+import { ErrorNotification, Subtitle, urls } from "@scm-manager/ui-components";
 import { ExtensionPoint } from "@scm-manager/ui-extensions";
 import RepositoryDangerZone from "./RepositoryDangerZone";
-import { urls } from "@scm-manager/ui-components";
 import { useTranslation } from "react-i18next";
 import ExportRepository from "./ExportRepository";
 import { useIndexLinks, useUpdateRepository } from "@scm-manager/ui-api";
@@ -58,7 +57,7 @@ const EditRepo: FC<Props> = ({ repository }) => {
       <Subtitle subtitle={t("repositoryForm.subtitle")} />
       <ErrorNotification error={error} />
       <RepositoryForm repository={repository} loading={isLoading} modifyRepository={update} />
-      <ExportRepository repository={repository} />
+      {repository._links.exportInfo && <ExportRepository repository={repository} />}
       <ExtensionPoint name="repo-config.route" props={extensionProps} renderAll={true} />
       <RepositoryDangerZone repository={repository} indexLinks={indexLinks} />
     </>