implemented ui for sources root

scm-ui/src/repos/components/RepositoryNavLink.js

@@ -0,0 +1,28 @@
+//@flow
+import React from "react";
+import type { Repository } from "@scm-manager/ui-types";
+import { NavLink } from "@scm-manager/ui-components";
+
+type Props = {
+  repository: Repository,
+  to: string,
+  label: string,
+  linkName: string
+};
+
+/**
+ * Component renders only if the repository contains the link with the given name.
+ */
+class RepositoryNavLink extends React.Component<Props> {
+  render() {
+    const { linkName, to, label, repository } = this.props;
+
+    if (!repository._links[linkName]) {
+      return null;
+    }
+
+    return <NavLink to={to} label={label} />;
+  }
+}
+
+export default RepositoryNavLink;