Merge with develop

2025-11-14 09:25:43 +01:00 · 2020-09-02 07:45:44 +02:00
parent 95dde51bba 055081db9f
commit 964f82bd09
64 changed files with 1134 additions and 485 deletions
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,11 +8,23 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 - Add support for scroll anchors in url hash of diff page ([#1304](https://github.com/scm-manager/scm-manager/pull/1304))

+## [2.4.1] - 2020-09-01
+### Added
+- Add "sonia.scm.restart-migration.wait" to set wait in milliseconds before restarting scm-server after migration ([#1308](https://github.com/scm-manager/scm-manager/pull/1308))
+
 ### Fixed
+- Fix detection of markdown files for files having content does not start with '#' ([#1306](https://github.com/scm-manager/scm-manager/pull/1306))
 - Fix broken markdown rendering ([#1303](https://github.com/scm-manager/scm-manager/pull/1303))
 - JWT token timeout is now handled properly ([#1297](https://github.com/scm-manager/scm-manager/pull/1297))
 - Fix text-overflow in danger zone ([#1298](https://github.com/scm-manager/scm-manager/pull/1298))
 - Fix plugin installation error if previously a plugin was installed with the same dependency which is still pending. ([#1300](https://github.com/scm-manager/scm-manager/pull/1300))
+- Fix layout overflow on changesets with multiple tags ([#1314](https://github.com/scm-manager/scm-manager/pull/1314))
+- Make checkbox accessible from keyboard ([#1309](https://github.com/scm-manager/scm-manager/pull/1309))
+- Fix logging of large stacktrace for unknown language ([#1313](https://github.com/scm-manager/scm-manager/pull/1313))
+- Fix incorrect word breaking behaviour in markdown ([#1317](https://github.com/scm-manager/scm-manager/pull/1317))
+- Remove obsolete revision encoding on sources ([#1315](https://github.com/scm-manager/scm-manager/pull/1315))
+- Map generic JaxRS 'web application exceptions' to appropriate response instead of "internal server error" ([#1318](https://github.com/scm-manager/scm-manager/pull/1312))
+

 ## [2.4.0] - 2020-08-14
 ### Added
@@ -284,3 +296,4 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 [2.3.0]: https://www.scm-manager.org/download/2.3.0
 [2.3.1]: https://www.scm-manager.org/download/2.3.1
 [2.4.0]: https://www.scm-manager.org/download/2.4.0
+[2.4.1]: https://www.scm-manager.org/download/2.4.1
--- a/lerna.json
+++ b/lerna.json
@@ -5,5 +5,5 @@
  ],
  "npmClient": "yarn",
  "useWorkspaces": true,
-  "version": "2.4.0"
+  "version": "2.4.1"
 }
--- a/scm-core/src/main/java/sonia/scm/web/filter/AuthenticationFilter.java
+++ b/scm-core/src/main/java/sonia/scm/web/filter/AuthenticationFilter.java
@@ -166,6 +166,11 @@ public class AuthenticationFilter extends HttpFilter {
    HttpUtil.sendUnauthorized(request, response, configuration.getRealmDescription());
  }

+  protected void handleTokenExpiredException(HttpServletRequest request, HttpServletResponse response,
+                                             FilterChain chain, TokenExpiredException tokenExpiredException) throws IOException, ServletException {
+    throw tokenExpiredException;
+  }
+
  /**
   * Iterates all {@link WebTokenGenerator} and creates an
   * {@link AuthenticationToken} from the given request.
@@ -211,7 +216,7 @@ public class AuthenticationFilter extends HttpFilter {
      processChain(request, response, chain, subject);
    } catch (TokenExpiredException ex) {
      // Rethrow to be caught by TokenExpiredFilter
-      throw ex;
+      handleTokenExpiredException(request, response, chain, ex);
    } catch (AuthenticationException ex) {
      logger.warn("authentication failed", ex);
      handleUnauthorized(request, response, chain);
--- a/scm-core/src/main/java/sonia/scm/web/filter/HttpProtocolServletAuthenticationFilterBase.java
+++ b/scm-core/src/main/java/sonia/scm/web/filter/HttpProtocolServletAuthenticationFilterBase.java
@@ -25,6 +25,7 @@
 package sonia.scm.web.filter;

 import sonia.scm.config.ScmConfiguration;
+import sonia.scm.security.TokenExpiredException;
 import sonia.scm.util.HttpUtil;
 import sonia.scm.web.UserAgent;
 import sonia.scm.web.UserAgentParser;
@@ -59,4 +60,15 @@ public class HttpProtocolServletAuthenticationFilterBase extends AuthenticationF
      HttpUtil.sendUnauthorized(request, response);
    }
  }
+
+  @Override
+  protected void handleTokenExpiredException(HttpServletRequest request, HttpServletResponse response, FilterChain chain, TokenExpiredException tokenExpiredException) throws IOException, ServletException {
+    UserAgent userAgent = userAgentParser.parse(request);
+    if (userAgent.isBrowser()) {
+      // we can proceed the filter chain because the HttpProtocolServlet will render the ui if the client is a browser
+      chain.doFilter(request, response);
+    } else {
+      super.handleTokenExpiredException(request, response, chain, tokenExpiredException);
+    }
+  }
 }
--- a/scm-core/src/test/java/sonia/scm/web/filter/HttpProtocolServletAuthenticationFilterBaseTest.java
+++ b/scm-core/src/test/java/sonia/scm/web/filter/HttpProtocolServletAuthenticationFilterBaseTest.java
@@ -30,6 +30,7 @@ import org.junit.jupiter.api.extension.ExtendWith;
 import org.mockito.Mock;
 import org.mockito.junit.jupiter.MockitoExtension;
 import sonia.scm.config.ScmConfiguration;
+import sonia.scm.security.TokenExpiredException;
 import sonia.scm.util.HttpUtil;
 import sonia.scm.web.UserAgent;
 import sonia.scm.web.UserAgentParser;
@@ -43,6 +44,7 @@ import java.io.IOException;
 import java.util.Collections;
 import java.util.Set;

+import static org.junit.jupiter.api.Assertions.assertThrows;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;

@@ -93,4 +95,23 @@ class HttpProtocolServletAuthenticationFilterBaseTest {
    verify(filterChain).doFilter(request, response);
  }

+  @Test
+  void shouldIgnoreTokenExpiredExceptionForBrowserCall() throws IOException, ServletException {
+    when(userAgentParser.parse(request)).thenReturn(browser);
+
+    authenticationFilter.handleTokenExpiredException(request, response, filterChain, new TokenExpiredException("Nothing ever expired so much"));
+
+    verify(filterChain).doFilter(request, response);
+  }
+
+  @Test
+  void shouldRethrowTokenExpiredExceptionForApiCall() {
+    when(userAgentParser.parse(request)).thenReturn(nonBrowser);
+
+    final TokenExpiredException tokenExpiredException = new TokenExpiredException("Nothing ever expired so much");
+
+    assertThrows(TokenExpiredException.class,
+      () -> authenticationFilter.handleTokenExpiredException(request, response, filterChain, tokenExpiredException));
+  }
+
 }
--- a/scm-plugins/scm-git-plugin/package.json
+++ b/scm-plugins/scm-git-plugin/package.json
@@ -1,7 +1,7 @@
 {
  "name": "@scm-manager/scm-git-plugin",
  "private": true,
-  "version": "2.4.0",
+  "version": "2.4.1",
  "license": "MIT",
  "main": "./src/main/js/index.ts",
  "scripts": {
@@ -20,6 +20,6 @@
  },
  "prettier": "@scm-manager/prettier-config",
  "dependencies": {
-    "@scm-manager/ui-plugins": "^2.4.0"
+    "@scm-manager/ui-plugins": "^2.4.1"
  }
 }
--- a/scm-plugins/scm-hg-plugin/package.json
+++ b/scm-plugins/scm-hg-plugin/package.json
@@ -1,7 +1,7 @@
 {
  "name": "@scm-manager/scm-hg-plugin",
  "private": true,
-  "version": "2.4.0",
+  "version": "2.4.1",
  "license": "MIT",
  "main": "./src/main/js/index.ts",
  "scripts": {
@@ -19,6 +19,6 @@
  },
  "prettier": "@scm-manager/prettier-config",
  "dependencies": {
-    "@scm-manager/ui-plugins": "^2.4.0"
+    "@scm-manager/ui-plugins": "^2.4.1"
  }
 }
--- a/scm-plugins/scm-legacy-plugin/package.json
+++ b/scm-plugins/scm-legacy-plugin/package.json
@@ -1,7 +1,7 @@
 {
  "name": "@scm-manager/scm-legacy-plugin",
  "private": true,
-  "version": "2.4.0",
+  "version": "2.4.1",
  "license": "MIT",
  "main": "./src/main/js/index.tsx",
  "scripts": {
@@ -19,6 +19,6 @@
  },
  "prettier": "@scm-manager/prettier-config",
  "dependencies": {
-    "@scm-manager/ui-plugins": "^2.4.0"
+    "@scm-manager/ui-plugins": "^2.4.1"
  }
 }
--- a/scm-plugins/scm-svn-plugin/package.json
+++ b/scm-plugins/scm-svn-plugin/package.json
@@ -1,7 +1,7 @@
 {
  "name": "@scm-manager/scm-svn-plugin",
  "private": true,
-  "version": "2.4.0",
+  "version": "2.4.1",
  "license": "MIT",
  "main": "./src/main/js/index.ts",
  "scripts": {
@@ -19,6 +19,6 @@
  },
  "prettier": "@scm-manager/prettier-config",
  "dependencies": {
-    "@scm-manager/ui-plugins": "^2.4.0"
+    "@scm-manager/ui-plugins": "^2.4.1"
  }
 }
--- a/scm-ui/e2e-tests/package.json
+++ b/scm-ui/e2e-tests/package.json
@@ -1,6 +1,6 @@
 {
  "name": "@scm-manager/e2e-tests",
-  "version": "2.4.0",
+  "version": "2.4.1",
  "description": "End to end Tests for SCM-Manager",
  "main": "index.js",
  "author": "Eduard Heimbuch <eduard.heimbuch@cloudogu.com>",
--- a/scm-ui/ui-components/.storybook/config.js
+++ b/scm-ui/ui-components/.storybook/config.js
@@ -29,6 +29,7 @@ import { withI18next } from "storybook-addon-i18next";
 import "!style-loader!css-loader!sass-loader!../../ui-styles/src/scm.scss";
 import React from "react";
 import { MemoryRouter } from "react-router-dom";
+import withRedux from "./withRedux";


 let i18n = i18next;
@@ -70,4 +71,6 @@ addDecorator(
  })
 );

+addDecorator(withRedux);
+
 configure(require.context("../src", true, /\.stories\.tsx?$/), module);
--- a/scm-ui/ui-components/.storybook/withRedux.js
+++ b/scm-ui/ui-components/.storybook/withRedux.js
@@ -0,0 +1,41 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020-present Cloudogu GmbH and Contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+import React from "react";
+import {createStore} from "redux";
+import { Provider } from 'react-redux'
+
+const reducer = (state, action) => {
+  return state;
+};
+
+const withRedux = (storyFn) => {
+  return React.createElement(Provider, {
+    store: createStore(reducer, {}),
+    children: storyFn()
+  });
+}
+
+
+export default withRedux;
--- a/scm-ui/ui-components/package.json
+++ b/scm-ui/ui-components/package.json
@@ -1,6 +1,6 @@
 {
  "name": "@scm-manager/ui-components",
-  "version": "2.4.0",
+  "version": "2.4.1",
  "description": "UI Components for SCM-Manager and its plugins",
  "main": "src/index.ts",
  "files": [
--- a/scm-ui/ui-components/src/ErrorBoundary.tsx
+++ b/scm-ui/ui-components/src/ErrorBoundary.tsx
@@ -21,14 +21,24 @@
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
-import React, { ReactNode } from "react";
+import React, { ComponentType, ReactNode } from "react";
 import ErrorNotification from "./ErrorNotification";
+import { MissingLinkError } from "./errors";
+import { withContextPath } from "./urls";
+import { withRouter, RouteComponentProps } from "react-router-dom";
+import ErrorPage from "./ErrorPage";
+import { WithTranslation, withTranslation } from "react-i18next";
+import { compose } from "redux";
+import { connect } from "react-redux";

-type Props = {
+type ExportedProps = {
  fallback?: React.ComponentType<any>;
  children: ReactNode;
+  loginLink?: string;
 };

+type Props = WithTranslation & RouteComponentProps & ExportedProps;
+
 type ErrorInfo = {
  componentStack: string;
 };
@@ -44,16 +54,44 @@ class ErrorBoundary extends React.Component<Props, State> {
    this.state = {};
  }

-  componentDidCatch(error: Error, errorInfo: ErrorInfo) {
-    // Catch errors in any components below and re-render with error message
-    this.setState({
-      error,
-      errorInfo
-    });
+  componentDidUpdate(prevProps: Readonly<Props>) {
+    // we must reset the error if the url has changed
+    if (this.state.error && prevProps.location !== this.props.location) {
+      this.setState({ error: undefined, errorInfo: undefined });
+    }
  }

+  componentDidCatch(error: Error, errorInfo: ErrorInfo) {
+    this.setState(
+      {
+        error,
+        errorInfo
+      },
+      () => this.redirectToLogin(error)
+    );
+  }
+
+  redirectToLogin = (error: Error) => {
+    const { loginLink } = this.props;
+    if (error instanceof MissingLinkError) {
+      if (loginLink) {
+        window.location.assign(withContextPath("/login"));
+      }
+    }
+  };
+
  renderError = () => {
+    const { t } = this.props;
+    const { error } = this.state;
+
    let FallbackComponent = this.props.fallback;
+
+    if (error instanceof MissingLinkError) {
+      return (
+        <ErrorPage error={error} title={t("errorNotification.prefix")} subtitle={t("errorNotification.forbidden")} />
+      );
+    }
+
    if (!FallbackComponent) {
      FallbackComponent = ErrorNotification;
    }
@@ -69,4 +107,17 @@ class ErrorBoundary extends React.Component<Props, State> {
    return this.props.children;
  }
 }
-export default ErrorBoundary;
+
+const mapStateToProps = (state: any) => {
+  const loginLink = state.indexResources?.links?.login?.href;
+
+  return {
+    loginLink
+  };
+};
+
+export default compose<ComponentType<ExportedProps>>(
+  withRouter,
+  withTranslation("commons"),
+  connect(mapStateToProps)
+)(ErrorBoundary);
--- a/scm-ui/ui-components/src/ErrorNotification.tsx
+++ b/scm-ui/ui-components/src/ErrorNotification.tsx
@@ -21,16 +21,26 @@
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
-import React from "react";
-import { WithTranslation, withTranslation } from "react-i18next";
+import React, { FC } from "react";
+import { useTranslation, WithTranslation, withTranslation } from "react-i18next";
 import { BackendError, ForbiddenError, UnauthorizedError } from "./errors";
 import Notification from "./Notification";
 import BackendErrorNotification from "./BackendErrorNotification";
+import { useLocation } from "react-router-dom";
+import { withContextPath } from "./urls";

 type Props = WithTranslation & {
  error?: Error;
 };

+const LoginLink: FC = () => {
+  const [t] = useTranslation("commons");
+  const location = useLocation();
+  const from = encodeURIComponent(location.pathname);
+
+  return <a href={withContextPath(`/login?from=${from}`)}>{t("errorNotification.loginLink")}</a>;
+};
+
 class ErrorNotification extends React.Component<Props> {
  render() {
    const { t, error } = this.props;
@@ -40,8 +50,7 @@ class ErrorNotification extends React.Component<Props> {
      } else if (error instanceof UnauthorizedError) {
        return (
          <Notification type="danger">
-            <strong>{t("errorNotification.prefix")}:</strong> {t("errorNotification.timeout")}{" "}
-            <a href="javascript:window.location.reload(true)">{t("errorNotification.loginLink")}</a>
+            <strong>{t("errorNotification.prefix")}:</strong> {t("errorNotification.timeout")} <LoginLink />
          </Notification>
        );
      } else if (error instanceof ForbiddenError) {
--- a/scm-ui/ui-components/src/ProtectedRoute.tsx
+++ b/scm-ui/ui-components/src/ProtectedRoute.tsx
@@ -22,7 +22,7 @@
 * SOFTWARE.
 */
 import React, { Component } from "react";
-import { Route, Redirect, withRouter, RouteComponentProps, RouteProps } from "react-router-dom";
+import { Redirect, Route, RouteComponentProps, RouteProps, withRouter } from "react-router-dom";

 type Props = RouteComponentProps &
  RouteProps & {
@@ -30,7 +30,16 @@ type Props = RouteComponentProps &
  };

 class ProtectedRoute extends Component<Props> {
-  renderRoute = (Component: any, authenticated?: boolean) => {
+  constructor(props: Props) {
+    super(props);
+    this.state = {
+      error: undefined
+    };
+  }
+
+  renderRoute = (Component: any) => {
+    const { authenticated } = this.props;
+
    return (routeProps: any) => {
      if (authenticated) {
        return <Component {...routeProps} />;
@@ -50,8 +59,8 @@ class ProtectedRoute extends Component<Props> {
  };

  render() {
-    const { component, authenticated, ...routeProps } = this.props;
-    return <Route {...routeProps} render={this.renderRoute(component, authenticated)} />;
+    const { component, ...routeProps } = this.props;
+    return <Route {...routeProps} render={this.renderRoute(component)} />;
  }
 }

--- a/scm-ui/ui-components/src/Tooltip.tsx
+++ b/scm-ui/ui-components/src/Tooltip.tsx
@@ -22,12 +22,12 @@
 * SOFTWARE.
 */
 import React, { ReactNode } from "react";
-import classNames from "classnames";

 type Props = {
  message: string;
  className?: string;
  location: string;
+  multiline?: boolean;
  children: ReactNode;
 };

@@ -37,9 +37,17 @@ class Tooltip extends React.Component<Props> {
  };

  render() {
-    const { className, message, location, children } = this.props;
+    const { className, message, location, multiline, children } = this.props;
+    let classes = `tooltip has-tooltip-${location}`;
+    if (multiline) {
+      classes += " has-tooltip-multiline";
+    }
+    if (className) {
+      classes += " " + className;
+    }
+
    return (
-      <span className={classNames("tooltip", "has-tooltip-" + location, className)} data-tooltip={message}>
+      <span className={classes} data-tooltip={message}>
        {children}
      </span>
    );
--- a/scm-ui/ui-components/src/snapshots/storyshots.test.ts.snap
+++ b/scm-ui/ui-components/src/snapshots/storyshots.test.ts.snap
@@ -44140,14 +44140,20 @@ exports[`Storyshots Forms|Checkbox Default 1`] = `
    <div
      className="control"
      onClick={[Function]}
+      onKeyDown={[Function]}
    >
      <label
        className="checkbox"
+      >
+        <span
+          className="gwt-Anchor"
+          tabIndex={0}
        >
          <i
            className="is-outlined fa-square has-text-black far"
          />
           
+        </span>
        Not checked
      </label>
    </div>
@@ -44158,14 +44164,20 @@ exports[`Storyshots Forms|Checkbox Default 1`] = `
    <div
      className="control"
      onClick={[Function]}
+      onKeyDown={[Function]}
    >
      <label
        className="checkbox"
+      >
+        <span
+          className="gwt-Anchor"
+          tabIndex={0}
        >
          <i
            className="is-outlined fa-check-square has-text-link fa"
          />
           
+        </span>
        Checked
      </label>
    </div>
@@ -44176,14 +44188,20 @@ exports[`Storyshots Forms|Checkbox Default 1`] = `
    <div
      className="control"
      onClick={[Function]}
+      onKeyDown={[Function]}
    >
      <label
        className="checkbox"
+      >
+        <span
+          className="gwt-Anchor"
+          tabIndex={0}
        >
          <i
            className="is-outlined fa-minus-square has-text-link far"
          />
           
+        </span>
        Indeterminate
      </label>
    </div>
@@ -44201,15 +44219,21 @@ exports[`Storyshots Forms|Checkbox Disabled 1`] = `
    <div
      className="control"
      onClick={[Function]}
+      onKeyDown={[Function]}
    >
      <label
        className="checkbox"
        disabled={true}
+      >
+        <span
+          className="gwt-Anchor"
+          tabIndex={0}
        >
          <i
            className="is-outlined fa-check-square has-text-grey-light fa"
          />
           
+        </span>
        Checked but disabled
      </label>
    </div>
@@ -44227,14 +44251,20 @@ exports[`Storyshots Forms|Checkbox With HelpText 1`] = `
    <div
      className="control"
      onClick={[Function]}
+      onKeyDown={[Function]}
    >
      <label
        className="checkbox"
+      >
+        <span
+          className="gwt-Anchor"
+          tabIndex={0}
        >
          <i
            className="is-outlined fa-square has-text-black far"
          />
           
+        </span>
        Classic helpText
        <span
          className="tooltip has-tooltip-right Help__HelpTooltip-ykmmew-0 cYhfno is-inline-block has-tooltip-multiline"
@@ -44253,14 +44283,20 @@ exports[`Storyshots Forms|Checkbox With HelpText 1`] = `
    <div
      className="control"
      onClick={[Function]}
+      onKeyDown={[Function]}
    >
      <label
        className="checkbox"
+      >
+        <span
+          className="gwt-Anchor"
+          tabIndex={0}
        >
          <i
            className="is-outlined fa-check-square has-text-link fa"
          />
           
+        </span>
        Long helpText
        <span
          className="tooltip has-tooltip-right Help__HelpTooltip-ykmmew-0 cYhfno is-inline-block has-tooltip-multiline"
@@ -47632,14 +47668,20 @@ exports[`Storyshots Modal|Modal With long tooltips 1`] = `
          <div
            className="control"
            onClick={[Function]}
+            onKeyDown={[Function]}
          >
            <label
              className="checkbox"
+            >
+              <span
+                className="gwt-Anchor"
+                tabIndex={0}
              >
                <i
                  className="is-outlined fa-check-square has-text-link fa"
                />
                 
+              </span>
              Checkbox
              <span
                className="tooltip has-tooltip-right Help__HelpTooltip-ykmmew-0 cYhfno is-inline-block has-tooltip-multiline"
--- a/scm-ui/ui-components/src/apiclient.ts
+++ b/scm-ui/ui-components/src/apiclient.ts
@@ -125,23 +125,15 @@ const applyFetchOptions: (p: RequestInit) => RequestInit = o => {

 function handleFailure(response: Response) {
  if (!response.ok) {
-    if (isBackendError(response)) {
-      return response.json().then((content: BackendErrorContent) => {
-        if (content.errorCode === TOKEN_EXPIRED_ERROR_CODE) {
-          window.location.replace(`${contextPath}/login`);
-          // Throw error because if redirect is not instantaneous, we want to display something senseful
-          throw new UnauthorizedError("Unauthorized", 401);
-        } else {
-          throw createBackendError(content, response.status);
-        }
-      });
-    } else {
    if (response.status === 401) {
      throw new UnauthorizedError("Unauthorized", 401);
    } else if (response.status === 403) {
      throw new ForbiddenError("Forbidden", 403);
-      }
-
+    } else if (isBackendError(response)) {
+      return response.json().then((content: BackendErrorContent) => {
+        throw createBackendError(content, response.status);
+      });
+    } else {
      throw new Error("server returned status code " + response.status);
    }
  }
@@ -163,24 +155,35 @@ export function createUrlWithIdentifiers(url: string): string {
  return createUrl(url) + "?X-SCM-Client=WUI&X-SCM-Session-ID=" + sessionId;
 }

+type ErrorListener = (error: Error) => void;
+
 class ApiClient {
-  get(url: string): Promise<Response> {
-    return fetch(createUrl(url), applyFetchOptions({})).then(handleFailure);
-  }
+  errorListeners: ErrorListener[] = [];

-  post(url: string, payload?: any, contentType = "application/json", additionalHeaders: Record<string, string> = {}) {
+  get = (url: string): Promise<Response> => {
+    return fetch(createUrl(url), applyFetchOptions({}))
+      .then(handleFailure)
+      .catch(this.notifyAndRethrow);
+  };
+
+  post = (
+    url: string,
+    payload?: any,
+    contentType = "application/json",
+    additionalHeaders: Record<string, string> = {}
+  ) => {
    return this.httpRequestWithJSONBody("POST", url, contentType, additionalHeaders, payload);
-  }
+  };

-  postText(url: string, payload: string, additionalHeaders: Record<string, string> = {}) {
+  postText = (url: string, payload: string, additionalHeaders: Record<string, string> = {}) => {
    return this.httpRequestWithTextBody("POST", url, additionalHeaders, payload);
-  }
+  };

-  putText(url: string, payload: string, additionalHeaders: Record<string, string> = {}) {
+  putText = (url: string, payload: string, additionalHeaders: Record<string, string> = {}) => {
    return this.httpRequestWithTextBody("PUT", url, additionalHeaders, payload);
-  }
+  };

-  postBinary(url: string, fileAppender: (p: FormData) => void, additionalHeaders: Record<string, string> = {}) {
+  postBinary = (url: string, fileAppender: (p: FormData) => void, additionalHeaders: Record<string, string> = {}) => {
    const formData = new FormData();
    fileAppender(formData);

@@ -190,35 +193,39 @@ class ApiClient {
      headers: additionalHeaders
    };
    return this.httpRequestWithBinaryBody(options, url);
-  }
+  };

  put(url: string, payload: any, contentType = "application/json", additionalHeaders: Record<string, string> = {}) {
    return this.httpRequestWithJSONBody("PUT", url, contentType, additionalHeaders, payload);
  }

-  head(url: string) {
+  head = (url: string) => {
    let options: RequestInit = {
      method: "HEAD"
    };
    options = applyFetchOptions(options);
-    return fetch(createUrl(url), options).then(handleFailure);
-  }
+    return fetch(createUrl(url), options)
+      .then(handleFailure)
+      .catch(this.notifyAndRethrow);
+  };

-  delete(url: string): Promise<Response> {
+  delete = (url: string): Promise<Response> => {
    let options: RequestInit = {
      method: "DELETE"
    };
    options = applyFetchOptions(options);
-    return fetch(createUrl(url), options).then(handleFailure);
-  }
+    return fetch(createUrl(url), options)
+      .then(handleFailure)
+      .catch(this.notifyAndRethrow);
+  };

-  httpRequestWithJSONBody(
+  httpRequestWithJSONBody = (
    method: string,
    url: string,
    contentType: string,
    additionalHeaders: Record<string, string>,
    payload?: any
-  ): Promise<Response> {
+  ): Promise<Response> => {
    const options: RequestInit = {
      method: method,
      headers: additionalHeaders
@@ -227,23 +234,23 @@ class ApiClient {
      options.body = JSON.stringify(payload);
    }
    return this.httpRequestWithBinaryBody(options, url, contentType);
-  }
+  };

-  httpRequestWithTextBody(
+  httpRequestWithTextBody = (
    method: string,
    url: string,
    additionalHeaders: Record<string, string> = {},
    payload: string
-  ) {
+  ) => {
    const options: RequestInit = {
      method: method,
      headers: additionalHeaders
    };
    options.body = payload;
    return this.httpRequestWithBinaryBody(options, url, "text/plain");
-  }
+  };

-  httpRequestWithBinaryBody(options: RequestInit, url: string, contentType?: string) {
+  httpRequestWithBinaryBody = (options: RequestInit, url: string, contentType?: string) => {
    options = applyFetchOptions(options);
    if (contentType) {
      if (!options.headers) {
@@ -253,8 +260,10 @@ class ApiClient {
      options.headers["Content-Type"] = contentType;
    }

-    return fetch(createUrl(url), options).then(handleFailure);
-  }
+    return fetch(createUrl(url), options)
+      .then(handleFailure)
+      .catch(this.notifyAndRethrow);
+  };

  subscribe(url: string, argument: SubscriptionArgument): Cancel {
    const es = new EventSource(createUrlWithIdentifiers(url), {
@@ -284,6 +293,15 @@ class ApiClient {

    return () => es.close();
  }
+
+  onError = (errorListener: ErrorListener) => {
+    this.errorListeners.push(errorListener);
+  };
+
+  private notifyAndRethrow = (error: Error): never => {
+    this.errorListeners.forEach(errorListener => errorListener(error));
+    throw error;
+  };
 }

 export const apiClient = new ApiClient();
--- a/scm-ui/ui-components/src/errors.ts
+++ b/scm-ui/ui-components/src/errors.ts
@@ -89,6 +89,10 @@ export class ConflictError extends BackendError {
  }
 }

+export class MissingLinkError extends Error {
+  name = "MissingLinkError";
+}
+
 export function createBackendError(content: BackendErrorContent, statusCode: number) {
  switch (statusCode) {
    case 404:
--- a/scm-ui/ui-components/src/forms/Checkbox.tsx
+++ b/scm-ui/ui-components/src/forms/Checkbox.tsx
@@ -45,6 +45,13 @@ export default class Checkbox extends React.Component<Props> {
    }
  };

+  onKeyDown = (event: React.KeyboardEvent) => {
+    const SPACE = 32;
+    if (event.keyCode === SPACE) {
+      this.onCheckboxChange();
+    }
+  };
+
  renderHelp = () => {
    const { title, helpText } = this.props;
    if (helpText && !title) {
@@ -64,7 +71,7 @@ export default class Checkbox extends React.Component<Props> {
    return (
      <div className="field">
        {this.renderLabelWithHelp()}
-        <div className="control" onClick={this.onCheckboxChange}>
+        <div className="control" onClick={this.onCheckboxChange} onKeyDown={this.onKeyDown}>
          {/*
            we have to ignore the next line,
            because jsx label does not the custom disabled attribute
--- a/scm-ui/ui-components/src/forms/TriStateCheckbox.tsx
+++ b/scm-ui/ui-components/src/forms/TriStateCheckbox.tsx
@@ -58,10 +58,13 @@ const TriStateCheckbox: FC<Props> = ({ checked, indeterminate, disabled, label,
    color = "black";
  }

+  // We need a tabIndex to make the checkbox accessible from keyboard.
+  // We also add the gwt-Anchor css class to support the key-jump browser extension
+  // https://github.com/KennethSundqvist/key-jump-chrome-extension/blob/master/src/content.js#L365
  return (
-    <>
+    <span tabIndex={0} className="gwt-Anchor">
      <Icon iconStyle={"is-outlined"} name={icon} className={className} color={color} testId={testId} /> {label}
-    </>
+    </span>
  );
 };

--- a/scm-ui/ui-components/src/navigation/PrimaryNavigation.tsx
+++ b/scm-ui/ui-components/src/navigation/PrimaryNavigation.tsx
@@ -26,8 +26,10 @@ import { WithTranslation, withTranslation } from "react-i18next";
 import PrimaryNavigationLink from "./PrimaryNavigationLink";
 import { Links } from "@scm-manager/ui-types";
 import { binder, ExtensionPoint } from "@scm-manager/ui-extensions";
+import {withContextPath} from "../urls";
+import { withRouter, RouteComponentProps } from "react-router-dom";

-type Props = WithTranslation & {
+type Props = RouteComponentProps & WithTranslation & {
  links: Links;
 };

@@ -64,11 +66,17 @@ class PrimaryNavigation extends React.Component<Props> {
  };

  appendLogin = (navigationItems: ReactNode[], append: Appender) => {
-    const { t, links } = this.props;
+    const { t, links, location } = this.props;
+
+    const from = location.pathname;
+    const loginPath = "/login";
+    const to = `${loginPath}?from=${encodeURIComponent(from)}`;

    const props = {
      links,
-      label: t("primary-navigation.login")
+      label: t("primary-navigation.login"),
+      loginUrl: withContextPath(loginPath),
+      from
    };

    if (binder.hasExtension("primary-navigation.login", props)) {
@@ -76,7 +84,7 @@ class PrimaryNavigation extends React.Component<Props> {
        <ExtensionPoint key="primary-navigation.login" name="primary-navigation.login" props={props} />
      );
    } else {
-      append("/login", "/login", "primary-navigation.login", "login");
+      append(to, "/login", "primary-navigation.login", "login");
    }
  };

@@ -128,4 +136,4 @@ class PrimaryNavigation extends React.Component<Props> {
  }
 }

-export default withTranslation("commons")(PrimaryNavigation);
+export default withTranslation("commons")(withRouter(PrimaryNavigation));
--- a/scm-ui/ui-components/src/repos/changesets/ChangesetTagsCollapsed.tsx
+++ b/scm-ui/ui-components/src/repos/changesets/ChangesetTagsCollapsed.tsx
@@ -36,7 +36,7 @@ class ChangesetTagsCollapsed extends React.Component<Props> {
    const { tags, t } = this.props;
    const message = tags.map(tag => tag.name).join(", ");
    return (
-      <Tooltip location="top" message={message}>
+      <Tooltip location="top" message={message} multiline={true}>
        <ChangesetTagBase icon="tags" label={tags.length + " " + t("changeset.tags")} />
      </Tooltip>
    );
--- a/scm-ui/ui-plugins/package.json
+++ b/scm-ui/ui-plugins/package.json
@@ -1,12 +1,12 @@
 {
  "name": "@scm-manager/ui-plugins",
-  "version": "2.4.0",
+  "version": "2.4.1",
  "license": "MIT",
  "bin": {
    "ui-plugins": "./bin/ui-plugins.js"
  },
  "dependencies": {
-    "@scm-manager/ui-components": "^2.4.0",
+    "@scm-manager/ui-components": "^2.4.1",
    "@scm-manager/ui-extensions": "^2.1.0",
    "classnames": "^2.2.6",
    "query-string": "^5.0.1",
@@ -23,7 +23,7 @@
    "@scm-manager/jest-preset": "^2.1.0",
    "@scm-manager/prettier-config": "^2.1.0",
    "@scm-manager/tsconfig": "^2.1.0",
-    "@scm-manager/ui-scripts": "^2.1.0",
+    "@scm-manager/ui-scripts": "^2.4.1",
    "@scm-manager/ui-tests": "^2.1.0",
    "@scm-manager/ui-types": "^2.4.0",
    "@types/classnames": "^2.2.9",
--- a/scm-ui/ui-scripts/package.json
+++ b/scm-ui/ui-scripts/package.json
@@ -1,6 +1,6 @@
 {
  "name": "@scm-manager/ui-scripts",
-  "version": "2.1.0",
+  "version": "2.4.1",
  "description": "Build scripts for SCM-Manager",
  "main": "src/index.js",
  "author": "Sebastian Sdorra <sebastian.sdorra@cloudogu.com>",
@@ -14,7 +14,7 @@
    "babel-loader": "^8.0.6",
    "css-loader": "^3.2.0",
    "file-loader": "^4.2.0",
-    "mini-css-extract-plugin": "^0.9.0",
+    "mini-css-extract-plugin": "^0.10.0",
    "mustache": "^3.1.0",
    "optimize-css-assets-webpack-plugin": "^5.0.3",
    "react-refresh": "^0.8.0",
--- a/scm-ui/ui-styles/package.json
+++ b/scm-ui/ui-styles/package.json
@@ -1,6 +1,6 @@
 {
  "name": "@scm-manager/ui-styles",
-  "version": "2.4.0",
+  "version": "2.4.1",
  "description": "Styles for SCM-Manager",
  "main": "src/scm.scss",
  "license": "MIT",
--- a/scm-ui/ui-styles/src/scm.scss
+++ b/scm-ui/ui-styles/src/scm.scss
@@ -15,11 +15,11 @@ $family-monospace: "Courier New", Monaco, Menlo, "Ubuntu Mono", "source-code-pro
 }

 .is-word-break {
-  -webkit-hyphens: auto;
-  -moz-hyphens: auto;
-  -ms-hyphens: auto;
-  hyphens: auto;
-  word-break: break-all;
+  -webkit-hyphens: none;
+  -moz-hyphens: none;
+  -ms-hyphens: none;
+  hyphens: none;
+  word-break: break-word;
 }

 .has-rounded-border {
--- a/scm-ui/ui-webapp/package.json
+++ b/scm-ui/ui-webapp/package.json
@@ -1,9 +1,9 @@
 {
  "name": "@scm-manager/ui-webapp",
-  "version": "2.4.0",
+  "version": "2.4.1",
  "private": true,
  "dependencies": {
-    "@scm-manager/ui-components": "^2.4.0",
+    "@scm-manager/ui-components": "^2.4.1",
    "@scm-manager/ui-extensions": "^2.1.0",
    "classnames": "^2.2.5",
    "history": "^4.10.1",
@@ -39,6 +39,7 @@
    "@types/react-dom": "^16.9.2",
    "@types/react-redux": "5.0.7",
    "@types/react-router-dom": "^5.1.0",
+    "@types/redux-logger": "^3.0.8",
    "@types/styled-components": "^5.1.0",
    "@types/systemjs": "^0.20.6",
    "fetch-mock": "^7.5.1",
--- a/scm-ui/ui-webapp/src/admin/containers/Admin.tsx
+++ b/scm-ui/ui-webapp/src/admin/containers/Admin.tsx
@@ -29,12 +29,13 @@ import { Redirect, Route, RouteComponentProps, Switch } from "react-router-dom";
 import { ExtensionPoint } from "@scm-manager/ui-extensions";
 import { Links } from "@scm-manager/ui-types";
 import {
+  CustomQueryFlexWrappedColumns,
  NavLink,
  Page,
-  CustomQueryFlexWrappedColumns,
  PrimaryContentColumn,
-  SecondaryNavigationColumn,
  SecondaryNavigation,
+  SecondaryNavigationColumn,
+  StateMenuContextProvider,
  SubNavigation
 } from "@scm-manager/ui-components";
 import { getAvailablePluginsLink, getInstalledPluginsLink, getLinks } from "../../modules/indexResource";
@@ -44,7 +45,6 @@ import GlobalConfig from "./GlobalConfig";
 import RepositoryRoles from "../roles/containers/RepositoryRoles";
 import SingleRepositoryRole from "../roles/containers/SingleRepositoryRole";
 import CreateRepositoryRole from "../roles/containers/CreateRepositoryRole";
-import { StateMenuContextProvider } from "@scm-manager/ui-components";

 type Props = RouteComponentProps &
  WithTranslation & {
--- a/scm-ui/ui-webapp/src/admin/containers/GlobalConfig.tsx
+++ b/scm-ui/ui-webapp/src/admin/containers/GlobalConfig.tsx
@@ -26,7 +26,7 @@ import { WithTranslation, withTranslation } from "react-i18next";
 import { connect } from "react-redux";
 import { Config, NamespaceStrategies } from "@scm-manager/ui-types";
 import { ErrorNotification, Loading, Title } from "@scm-manager/ui-components";
-import { getConfigLink } from "../../modules/indexResource";
+import { mustGetConfigLink } from "../../modules/indexResource";
 import {
  fetchConfig,
  getConfig,
@@ -186,7 +186,7 @@ const mapStateToProps = (state: any) => {

  const config = getConfig(state);
  const configUpdatePermission = getConfigUpdatePermission(state);
-  const configLink = getConfigLink(state);
+  const configLink = mustGetConfigLink(state);
  const namespaceStrategies = getNamespaceStrategies(state);

  return {
--- a/scm-ui/ui-webapp/src/admin/plugins/containers/PluginsOverview.tsx
+++ b/scm-ui/ui-webapp/src/admin/plugins/containers/PluginsOverview.tsx
@@ -25,7 +25,7 @@ import * as React from "react";
 import { connect } from "react-redux";
 import { WithTranslation, withTranslation } from "react-i18next";
 import { compose } from "redux";
-import { PendingPlugins, PluginCollection } from "@scm-manager/ui-types";
+import { PendingPlugins, Plugin, PluginCollection } from "@scm-manager/ui-types";
 import {
  Button,
  ButtonGroup,
@@ -45,16 +45,15 @@ import {
 } from "../modules/plugins";
 import PluginsList from "../components/PluginList";
 import {
-  getAvailablePluginsLink,
-  getInstalledPluginsLink,
-  getPendingPluginsLink
+  getPendingPluginsLink,
+  mustGetAvailablePluginsLink,
+  mustGetInstalledPluginsLink
 } from "../../../modules/indexResource";
 import PluginTopActions from "../components/PluginTopActions";
 import PluginBottomActions from "../components/PluginBottomActions";
 import ExecutePendingActionModal from "../components/ExecutePendingActionModal";
 import CancelPendingActionModal from "../components/CancelPendingActionModal";
 import UpdateAllActionModal from "../components/UpdateAllActionModal";
-import { Plugin } from "@scm-manager/ui-types";
 import ShowPendingModal from "../components/ShowPendingModal";

 type Props = WithTranslation & {
@@ -319,8 +318,8 @@ const mapStateToProps = (state: any) => {
  const collection = getPluginCollection(state);
  const loading = isFetchPluginsPending(state);
  const error = getFetchPluginsFailure(state);
-  const availablePluginsLink = getAvailablePluginsLink(state);
-  const installedPluginsLink = getInstalledPluginsLink(state);
+  const availablePluginsLink = mustGetAvailablePluginsLink(state);
+  const installedPluginsLink = mustGetInstalledPluginsLink(state);
  const pendingPluginsLink = getPendingPluginsLink(state);
  const pendingPlugins = getPendingPlugins(state);

--- a/scm-ui/ui-webapp/src/admin/roles/containers/SingleRepositoryRole.tsx
+++ b/scm-ui/ui-webapp/src/admin/roles/containers/SingleRepositoryRole.tsx
@@ -29,7 +29,7 @@ import { History } from "history";
 import { ExtensionPoint } from "@scm-manager/ui-extensions";
 import { RepositoryRole } from "@scm-manager/ui-types";
 import { ErrorPage, Loading, Title } from "@scm-manager/ui-components";
-import { getRepositoryRolesLink } from "../../../modules/indexResource";
+import { mustGetRepositoryRolesLink } from "../../../modules/indexResource";
 import { fetchRoleByName, getFetchRoleFailure, getRoleByName, isFetchRolePending } from "../modules/roles";
 import PermissionRoleDetail from "../components/PermissionRoleDetails";
 import EditRepositoryRole from "./EditRepositoryRole";
@@ -107,7 +107,7 @@ const mapStateToProps = (state: any, ownProps: Props) => {
  const role = getRoleByName(state, roleName);
  const loading = isFetchRolePending(state, roleName);
  const error = getFetchRoleFailure(state, roleName);
-  const repositoryRolesLink = getRepositoryRolesLink(state);
+  const repositoryRolesLink = mustGetRepositoryRolesLink(state);
  return {
    repositoryRolesLink,
    roleName,
--- a/scm-ui/ui-webapp/src/containers/Index.tsx
+++ b/scm-ui/ui-webapp/src/containers/Index.tsx
@@ -64,6 +64,15 @@ class Index extends Component<Props, State> {
    this.props.fetchIndexResources();
  }

+  componentDidUpdate() {
+    const { indexResources, loading, error } = this.props;
+    const { pluginsLoaded } = this.state;
+    if (!indexResources && !loading && !error && pluginsLoaded) {
+      this.props.fetchIndexResources();
+      this.setState({ pluginsLoaded: false });
+    }
+  }
+
  pluginLoaderCallback = () => {
    this.setState({
      pluginsLoaded: true
--- a/scm-ui/ui-webapp/src/containers/Login.test.ts
+++ b/scm-ui/ui-webapp/src/containers/Login.test.ts
@@ -0,0 +1,62 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020-present Cloudogu GmbH and Contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+import { from } from "./Login";
+
+describe("from tests", () => {
+  it("should use default location", () => {
+    const path = from("", {});
+    expect(path).toBe("/");
+  });
+
+  it("should use default location without params", () => {
+    const path = from();
+    expect(path).toBe("/");
+  });
+
+  it("should use default location with null params", () => {
+    const path = from("", null);
+    expect(path).toBe("/");
+  });
+
+  it("should use location from query parameter", () => {
+    const path = from("from=/repos", {});
+    expect(path).toBe("/repos");
+  });
+
+  it("should use location from state", () => {
+    const path = from("", { from: "/users" });
+    expect(path).toBe("/users");
+  });
+
+  it("should prefer location from query parameter", () => {
+    const path = from("from=/groups", { from: "/users" });
+    expect(path).toBe("/groups");
+  });
+
+  it("should decode query param", () => {
+    const path = from(`from=${encodeURIComponent("/admin/plugins/installed")}`);
+    expect(path).toBe("/admin/plugins/installed");
+  });
+});
--- a/scm-ui/ui-webapp/src/containers/Login.tsx
+++ b/scm-ui/ui-webapp/src/containers/Login.tsx
@@ -30,6 +30,7 @@ import { getLoginFailure, getMe, isAnonymous, isLoginPending, login } from "../m
 import { getLoginInfoLink, getLoginLink } from "../modules/indexResource";
 import LoginInfo from "../components/LoginInfo";
 import { Me } from "@scm-manager/ui-types";
+import { parse } from "query-string";

 type Props = RouteComponentProps & {
  authenticated: boolean;
@@ -47,6 +48,18 @@ const HeroSection = styled.section`
  padding-top: 2em;
 `;

+interface FromObject {
+  from?: string;
+}
+
+/**
+ * @visibleForTesting
+ */
+export const from = (queryString?: string, stateParams?: FromObject | null): string => {
+  const queryParams = parse(queryString || "");
+  return queryParams?.from || stateParams?.from || "/";
+};
+
 class Login extends React.Component<Props> {
  handleLogin = (username: string, password: string): void => {
    const { link, login } = this.props;
@@ -54,12 +67,8 @@ class Login extends React.Component<Props> {
  };

  renderRedirect = () => {
-    const { from } = this.props.location.state || {
-      from: {
-        pathname: "/"
-      }
-    };
-    return <Redirect to={from} />;
+    const to = from(window.location.search, this.props.location.state);
+    return <Redirect to={to} />;
  };

  render() {
--- a/scm-ui/ui-webapp/src/containers/Main.tsx
+++ b/scm-ui/ui-webapp/src/containers/Main.tsx
@@ -31,7 +31,7 @@ import Users from "../users/containers/Users";
 import Login from "../containers/Login";
 import Logout from "../containers/Logout";

-import { ProtectedRoute } from "@scm-manager/ui-components";
+import { ProtectedRoute, ErrorBoundary } from "@scm-manager/ui-components";
 import { binder, ExtensionPoint } from "@scm-manager/ui-extensions";

 import CreateUser from "../users/containers/CreateUser";
@@ -68,6 +68,7 @@ class Main extends React.Component<Props> {
      url = "/login";
    }
    return (
+      <ErrorBoundary>
        <div className="main">
          <Switch>
            <Redirect exact from="/" to={url} />
@@ -80,13 +81,13 @@ class Main extends React.Component<Props> {
            <ProtectedRoute path="/repo/:namespace/:name" component={RepositoryRoot} authenticated={authenticated} />
            <Redirect exact strict from="/users" to="/users/" />
            <ProtectedRoute exact path="/users/" component={Users} authenticated={authenticated} />
-          <ProtectedRoute authenticated={authenticated} path="/users/create" component={CreateUser} />
+            <ProtectedRoute path="/users/create" component={CreateUser} authenticated={authenticated} />
            <ProtectedRoute exact path="/users/:page" component={Users} authenticated={authenticated} />
-          <ProtectedRoute authenticated={authenticated} path="/user/:name" component={SingleUser} />
+            <ProtectedRoute path="/user/:name" component={SingleUser} authenticated={authenticated} />
            <Redirect exact strict from="/groups" to="/groups/" />
            <ProtectedRoute exact path="/groups/" component={Groups} authenticated={authenticated} />
-          <ProtectedRoute authenticated={authenticated} path="/group/:name" component={SingleGroup} />
-          <ProtectedRoute authenticated={authenticated} path="/groups/create" component={CreateGroup} />
+            <ProtectedRoute path="/group/:name" component={SingleGroup} authenticated={authenticated} />
+            <ProtectedRoute path="/groups/create" component={CreateGroup} authenticated={authenticated} />
            <ProtectedRoute exact path="/groups/:page" component={Groups} authenticated={authenticated} />
            <ProtectedRoute path="/admin" component={Admin} authenticated={authenticated} />
            <ProtectedRoute path="/me" component={Profile} authenticated={authenticated} />
@@ -94,13 +95,14 @@ class Main extends React.Component<Props> {
              name="main.route"
              renderAll={true}
              props={{
-              authenticated,
                me,
-              links
+                links,
+                authenticated
              }}
            />
          </Switch>
        </div>
+      </ErrorBoundary>
    );
  }
 }
--- a/scm-ui/ui-webapp/src/createReduxStore.ts
+++ b/scm-ui/ui-webapp/src/createReduxStore.ts
@@ -24,14 +24,14 @@

 import thunk from "redux-thunk";
 import logger from "redux-logger";
-import { applyMiddleware, combineReducers, compose, createStore } from "redux";
+import { AnyAction, applyMiddleware, combineReducers, compose, createStore } from "redux";
 import users from "./users/modules/users";
 import repos from "./repos/modules/repos";
 import repositoryTypes from "./repos/modules/repositoryTypes";
 import changesets from "./repos/modules/changesets";
 import sources from "./repos/sources/modules/sources";
 import groups from "./groups/modules/groups";
-import auth from "./modules/auth";
+import auth, { isAuthenticated } from "./modules/auth";
 import pending from "./modules/pending";
 import failure from "./modules/failure";
 import permissions from "./repos/permissions/modules/permissions";
@@ -40,13 +40,16 @@ import roles from "./admin/roles/modules/roles";
 import namespaceStrategies from "./admin/modules/namespaceStrategies";
 import indexResources from "./modules/indexResource";
 import plugins from "./admin/plugins/modules/plugins";
-
+import { apiClient, UnauthorizedError } from "@scm-manager/ui-components";
 import branches from "./repos/branches/modules/branches";

+const EMPTY_STATE = {} as any;
+
 function createReduxStore() {
+  // @ts-ignore __REDUX_DEVTOOLS_EXTENSION_COMPOSE__ is defined by react dev tools
  const composeEnhancers = window.__REDUX_DEVTOOLS_EXTENSION_COMPOSE__ || compose;

-  const reducer = combineReducers({
+  const appReducer = combineReducers({
    pending,
    failure,
    indexResources,
@@ -65,7 +68,39 @@ function createReduxStore() {
    plugins
  });

-  return createStore(reducer, composeEnhancers(applyMiddleware(thunk, logger)));
+  // We assume that an UnauthorizedError means that the access token is expired.
+  // If the token is expired we want to show an error with the login link.
+  // This error should be displayed with the state (e.g. navigation) of the previous logged in user.
+  // But if the user navigates away, we want to reset the state to an anonymous one.
+
+  const reducer = (state: any, action: AnyAction) => {
+    // Reset the state if the token is expired and a new action is dispatched (e.g. navigation).
+    // We exclude failures, because the fetch which had triggered the unauthorized error
+    // will likely end with an failure action.
+    if (state.tokenExpired && !action.type.includes("FAILURE")) {
+      // reset state by passing an empty state down to the app reducer
+      // we do not use the captured action, because the data is derived from the old state
+      return appReducer(EMPTY_STATE, { type: "_" });
+    }
+
+    // If the user is authenticated and response is an unauthorized error,
+    // we assume that the token is expired.
+    if (action.type === "API_CLIENT_UNAUTHORIZED" && isAuthenticated(state)) {
+      return { ...state, tokenExpired: true };
+    }
+
+    // Keep the tokenExpired after calling appReducer,
+    // this is required because the appReducer would remove any unknown property.
+    return { ...appReducer(state, action), tokenExpired: state.tokenExpired };
+  };
+
+  const store = createStore(reducer, EMPTY_STATE, composeEnhancers(applyMiddleware(thunk, logger)));
+  apiClient.onError(error => {
+    if (error instanceof UnauthorizedError) {
+      store.dispatch({ type: "API_CLIENT_UNAUTHORIZED", error });
+    }
+  });
+  return store;
 }

 export default createReduxStore;
--- a/scm-ui/ui-webapp/src/groups/containers/CreateGroup.tsx
+++ b/scm-ui/ui-webapp/src/groups/containers/CreateGroup.tsx
@@ -27,11 +27,10 @@ import { compose } from "redux";
 import { WithTranslation, withTranslation } from "react-i18next";
 import { History } from "history";
 import { DisplayedUser, Group } from "@scm-manager/ui-types";
-import { Page } from "@scm-manager/ui-components";
-import { getGroupsLink, getUserAutoCompleteLink } from "../../modules/indexResource";
+import { apiClient, Page } from "@scm-manager/ui-components";
+import { getUserAutoCompleteLink, mustGetGroupsLink } from "../../modules/indexResource";
 import { createGroup, createGroupReset, getCreateGroupFailure, isCreateGroupPending } from "../modules/groups";
 import GroupForm from "../components/GroupForm";
-import { apiClient } from "@scm-manager/ui-components";

 type Props = WithTranslation & {
  createGroup: (link: string, group: Group, callback?: () => void) => void;
@@ -97,7 +96,7 @@ const mapDispatchToProps = (dispatch: any) => {
 const mapStateToProps = (state: any) => {
  const loading = isCreateGroupPending(state);
  const error = getCreateGroupFailure(state);
-  const createLink = getGroupsLink(state);
+  const createLink = mustGetGroupsLink(state);
  const autocompleteLink = getUserAutoCompleteLink(state);
  return {
    createLink,
--- a/scm-ui/ui-webapp/src/groups/containers/Groups.tsx
+++ b/scm-ui/ui-webapp/src/groups/containers/Groups.tsx
@@ -35,7 +35,7 @@ import {
  PageActions,
  urls
 } from "@scm-manager/ui-components";
-import { getGroupsLink } from "../../modules/indexResource";
+import { mustGetGroupsLink } from "../../modules/indexResource";
 import {
  fetchGroupsByPage,
  getFetchGroupsFailure,
@@ -128,7 +128,7 @@ const mapStateToProps = (state: any, ownProps: Props) => {
  const page = urls.getPageFromMatch(match);
  const canAddGroups = isPermittedToCreateGroups(state);
  const list = selectListAsCollection(state);
-  const groupLink = getGroupsLink(state);
+  const groupLink = mustGetGroupsLink(state);

  return {
    groups,
--- a/scm-ui/ui-webapp/src/groups/containers/SingleGroup.tsx
+++ b/scm-ui/ui-webapp/src/groups/containers/SingleGroup.tsx
@@ -39,7 +39,7 @@ import {
  SubNavigation,
  StateMenuContextProvider
 } from "@scm-manager/ui-components";
-import { getGroupsLink } from "../../modules/indexResource";
+import { getGroupsLink, mustGetGroupsLink } from "../../modules/indexResource";
 import { fetchGroupByName, getFetchGroupFailure, getGroupByName, isFetchGroupPending } from "../modules/groups";
 import { Details } from "./../components/table";
 import { EditGroupNavLink, SetPermissionsNavLink } from "./../components/navLinks";
@@ -138,7 +138,7 @@ const mapStateToProps = (state: any, ownProps: Props) => {
  const group = getGroupByName(state, name);
  const loading = isFetchGroupPending(state, name);
  const error = getFetchGroupFailure(state, name);
-  const groupLink = getGroupsLink(state);
+  const groupLink = mustGetGroupsLink(state);

  return {
    name,
--- a/scm-ui/ui-webapp/src/modules/indexResource.test.ts
+++ b/scm-ui/ui-webapp/src/modules/indexResource.test.ts
@@ -117,7 +117,7 @@ const indexResourcesAuthenticated = {

 describe("index resource", () => {
  describe("fetch index resource", () => {
-    const index_url = "/api/v2/";
+    const indexUrl = "/api/v2/";
    const mockStore = configureMockStore([thunk]);

    afterEach(() => {
@@ -126,7 +126,7 @@ describe("index resource", () => {
    });

    it("should successfully fetch index resources when unauthenticated", () => {
-      fetchMock.getOnce(index_url, indexResourcesUnauthenticated);
+      fetchMock.getOnce(indexUrl, indexResourcesUnauthenticated);

      const expectedActions = [
        {
@@ -145,7 +145,7 @@ describe("index resource", () => {
    });

    it("should successfully fetch index resources when authenticated", () => {
-      fetchMock.getOnce(index_url, indexResourcesAuthenticated);
+      fetchMock.getOnce(indexUrl, indexResourcesAuthenticated);

      const expectedActions = [
        {
@@ -164,7 +164,7 @@ describe("index resource", () => {
    });

    it("should dispatch FETCH_INDEX_RESOURCES_FAILURE if request fails", () => {
-      fetchMock.getOnce(index_url, {
+      fetchMock.getOnce(indexUrl, {
        status: 500
      });

@@ -176,6 +176,50 @@ describe("index resource", () => {
        expect(actions[1].payload).toBeDefined();
      });
    });
+
+    it("should retry to fetch index resource on unauthorized error", () => {
+      fetchMock.getOnce(indexUrl, { status: 401 }).getOnce(indexUrl, indexResourcesAuthenticated, {
+        overwriteRoutes: false
+      });
+
+      const expectedActions = [
+        {
+          type: FETCH_INDEXRESOURCES_PENDING
+        },
+        {
+          type: FETCH_INDEXRESOURCES_SUCCESS,
+          payload: indexResourcesAuthenticated
+        }
+      ];
+
+      const store = mockStore({});
+      return store.dispatch(fetchIndexResources()).then(() => {
+        expect(store.getActions()).toEqual(expectedActions);
+      });
+    });
+
+    it("should only retry to fetch index resource on unauthorized error once", () => {
+      fetchMock
+        .getOnce(indexUrl, { status: 401 })
+        .getOnce(
+          indexUrl,
+          { status: 401 },
+          {
+            overwriteRoutes: false
+          }
+        )
+        .getOnce(indexUrl, indexResourcesAuthenticated, {
+          overwriteRoutes: false
+        });
+
+      const store = mockStore({});
+      return store.dispatch(fetchIndexResources()).then(() => {
+        const actions = store.getActions();
+        expect(actions[0].type).toEqual(FETCH_INDEXRESOURCES_PENDING);
+        expect(actions[1].type).toEqual(FETCH_INDEXRESOURCES_FAILURE);
+        expect(actions[1].payload).toBeDefined();
+      });
+    });
  });

  describe("index resources reducer", () => {
--- a/scm-ui/ui-webapp/src/modules/indexResource.ts
+++ b/scm-ui/ui-webapp/src/modules/indexResource.ts
@@ -24,7 +24,7 @@

 import * as types from "./types";

-import { apiClient } from "@scm-manager/ui-components";
+import { apiClient, MissingLinkError, UnauthorizedError } from "@scm-manager/ui-components";
 import { Action, IndexResources, Link } from "@scm-manager/ui-types";
 import { isPending } from "./pending";
 import { getFailure } from "./failure";
@@ -46,14 +46,27 @@ export const callFetchIndexResources = (): Promise<IndexResources> => {

 export function fetchIndexResources() {
  return function(dispatch: any) {
+    /*
+     * The index resource returns a 401 if the access token expired.
+     * This only happens once because the error response automatically invalidates the cookie.
+     * In this event, we have to try the request once again.
+     */
+    let shouldRetry = true;
    dispatch(fetchIndexResourcesPending());
-    return callFetchIndexResources()
+    const run = (): Promise<any> =>
+      callFetchIndexResources()
        .then(resources => {
          dispatch(fetchIndexResourcesSuccess(resources));
        })
        .catch(err => {
+          if (err instanceof UnauthorizedError && shouldRetry) {
+            shouldRetry = false;
+            return run();
+          } else {
            dispatch(fetchIndexResourcesFailure(err));
+          }
        });
+    return run();
  };
 }

@@ -123,6 +136,14 @@ export function getLink(state: object, name: string) {
  }
 }

+export function mustGetLink(state: object, name: string) {
+  const link = getLink(state, name);
+  if (link) {
+    return link;
+  }
+  throw new MissingLinkError(`No link in state for link name: '${name}'`);
+}
+
 export function getLinkCollection(state: object, name: string): Link[] {
  // @ts-ignore Right types not available
  if (state.indexResources.links && state.indexResources.links[name]) {
@@ -145,10 +166,18 @@ export function getAvailablePluginsLink(state: object) {
  return getLink(state, "availablePlugins");
 }

+export function mustGetAvailablePluginsLink(state: object) {
+  return mustGetLink(state, "availablePlugins");
+}
+
 export function getInstalledPluginsLink(state: object) {
  return getLink(state, "installedPlugins");
 }

+export function mustGetInstalledPluginsLink(state: object) {
+  return mustGetLink(state, "installedPlugins");
+}
+
 export function getPendingPluginsLink(state: object) {
  return getLink(state, "pendingPlugins");
 }
@@ -169,10 +198,18 @@ export function getUsersLink(state: object) {
  return getLink(state, "users");
 }

+export function mustGetUsersLink(state: object) {
+  return mustGetLink(state, "users");
+}
+
 export function getRepositoryRolesLink(state: object) {
  return getLink(state, "repositoryRoles");
 }

+export function mustGetRepositoryRolesLink(state: object) {
+  return mustGetLink(state, "repositoryRoles");
+}
+
 export function getRepositoryVerbsLink(state: object) {
  return getLink(state, "repositoryVerbs");
 }
@@ -181,10 +218,18 @@ export function getGroupsLink(state: object) {
  return getLink(state, "groups");
 }

+export function mustGetGroupsLink(state: object) {
+  return mustGetLink(state, "groups");
+}
+
 export function getConfigLink(state: object) {
  return getLink(state, "config");
 }

+export function mustGetConfigLink(state: object) {
+  return mustGetLink(state, "config");
+}
+
 export function getRepositoriesLink(state: object) {
  return getLink(state, "repositories");
 }
--- a/scm-ui/ui-webapp/src/repos/components/changesets/ChangesetDetails.tsx
+++ b/scm-ui/ui-webapp/src/repos/components/changesets/ChangesetDetails.tsx
@@ -26,7 +26,7 @@ import { Trans, useTranslation, WithTranslation, withTranslation } from "react-i
 import classNames from "classnames";
 import styled from "styled-components";
 import { ExtensionPoint } from "@scm-manager/ui-extensions";
-import { Changeset, ParentChangeset, Repository, Tag } from "@scm-manager/ui-types";
+import { Changeset, ParentChangeset, Repository } from "@scm-manager/ui-types";
 import {
  AvatarImage,
  AvatarWrapper,
@@ -36,14 +36,15 @@ import {
  ChangesetDiff,
  ChangesetId,
  changesets,
-  ChangesetTag,
+  ChangesetTags,
  DateFromNow,
+  FileControlFactory,
  Icon,
-  Level
+  Level,
+  SignatureIcon
 } from "@scm-manager/ui-components";
 import ContributorTable from "./ContributorTable";
 import { Link as ReactLink } from "react-router-dom";
-import { FileControlFactory, SignatureIcon } from "@scm-manager/ui-components";

 type Props = WithTranslation & {
  changeset: Changeset;
@@ -59,16 +60,6 @@ const RightMarginP = styled.p`
  margin-right: 1em;
 `;

-const TagsWrapper = styled.div`
-  & .tag {
-    margin-left: 0.25rem;
-  }
-`;
-
-const SignedIcon = styled(SignatureIcon)`
-  padding-left: 1rem;
-`;
-
 const BottomMarginLevel = styled(Level)`
  margin-bottom: 1rem !important;
 `;
@@ -224,7 +215,9 @@ class ChangesetDetails extends React.Component<Props, State> {
                )}
              </ChangesetSummary>
            </div>
-            <div className="media-right">{this.renderTags()}</div>
+            <div className="media-right">
+              <ChangesetTags changeset={changeset} />
+            </div>
          </article>
          <p>
            {description.message.split("\n").map((item, key) => {
@@ -264,24 +257,6 @@ class ChangesetDetails extends React.Component<Props, State> {
    );
  }

-  getTags = () => {
-    return this.props.changeset._embedded.tags || [];
-  };
-
-  renderTags = () => {
-    const tags = this.getTags();
-    if (tags.length > 0) {
-      return (
-        <TagsWrapper className="level-item">
-          {tags.map((tag: Tag) => {
-            return <ChangesetTag key={tag.name} tag={tag} />;
-          })}
-        </TagsWrapper>
-      );
-    }
-    return null;
-  };
-
  collapseDiffs = () => {
    this.setState(state => ({
      collapsed: !state.collapsed
--- a/scm-ui/ui-webapp/src/repos/sources/containers/SourcesView.tsx
+++ b/scm-ui/ui-webapp/src/repos/sources/containers/SourcesView.tsx
@@ -87,7 +87,7 @@ class SourcesView extends React.Component<Props, State> {
    const basePath = this.createBasePath();
    if (contentType.startsWith("image/")) {
      return <ImageViewer file={file} />;
-    } else if (contentType.includes("markdown")) {
+    } else if (contentType.includes("markdown") || (language && language.toLowerCase() === "markdown")) {
      return <SwitchableMarkdownViewer file={file} basePath={basePath} />;
    } else if (language) {
      return <SourcecodeViewer file={file} language={language} />;
--- a/scm-ui/ui-webapp/src/users/containers/CreateUser.tsx
+++ b/scm-ui/ui-webapp/src/users/containers/CreateUser.tsx
@@ -28,7 +28,7 @@ import { WithTranslation, withTranslation } from "react-i18next";
 import { History } from "history";
 import { User } from "@scm-manager/ui-types";
 import { Page } from "@scm-manager/ui-components";
-import { getUsersLink } from "../../modules/indexResource";
+import { mustGetUsersLink } from "../../modules/indexResource";
 import { createUser, createUserReset, getCreateUserFailure, isCreateUserPending } from "../modules/users";
 import UserForm from "../components/UserForm";

@@ -84,7 +84,7 @@ const mapDispatchToProps = (dispatch: any) => {
 const mapStateToProps = (state: any) => {
  const loading = isCreateUserPending(state);
  const error = getCreateUserFailure(state);
-  const usersLink = getUsersLink(state);
+  const usersLink = mustGetUsersLink(state);
  return {
    usersLink,
    loading,
--- a/scm-ui/ui-webapp/src/users/containers/SingleUser.tsx
+++ b/scm-ui/ui-webapp/src/users/containers/SingleUser.tsx
@@ -43,10 +43,9 @@ import EditUser from "./EditUser";
 import { fetchUserByName, getFetchUserFailure, getUserByName, isFetchUserPending } from "../modules/users";
 import { EditUserNavLink, SetPasswordNavLink, SetPermissionsNavLink, SetPublicKeysNavLink } from "./../components/navLinks";
 import { WithTranslation, withTranslation } from "react-i18next";
-import { getUsersLink } from "../../modules/indexResource";
+import { mustGetUsersLink } from "../../modules/indexResource";
 import SetUserPassword from "../components/SetUserPassword";
 import SetPermissions from "../../permissions/components/SetPermissions";
-import AddPublicKey from "../components/publicKeys/AddPublicKey";
 import SetPublicKeys from "../components/publicKeys/SetPublicKeys";

 type Props = RouteComponentProps &
@@ -148,7 +147,7 @@ const mapStateToProps = (state: any, ownProps: Props) => {
  const user = getUserByName(state, name);
  const loading = isFetchUserPending(state, name);
  const error = getFetchUserFailure(state, name);
-  const usersLink = getUsersLink(state);
+  const usersLink = mustGetUsersLink(state);
  return {
    usersLink,
    name,
--- a/scm-ui/ui-webapp/src/users/containers/Users.tsx
+++ b/scm-ui/ui-webapp/src/users/containers/Users.tsx
@@ -35,7 +35,7 @@ import {
  PageActions,
  urls
 } from "@scm-manager/ui-components";
-import { getUsersLink } from "../../modules/indexResource";
+import { mustGetUsersLink } from "../../modules/indexResource";
 import {
  fetchUsersByPage,
  getFetchUsersFailure,
@@ -129,7 +129,7 @@ const mapStateToProps = (state: any, ownProps: Props) => {
  const page = urls.getPageFromMatch(match);
  const canAddUsers = isPermittedToCreateUsers(state);
  const list = selectListAsCollection(state);
-  const usersLink = getUsersLink(state);
+  const usersLink = mustGetUsersLink(state);

  return {
    users,
--- a/scm-webapp/pom.xml
+++ b/scm-webapp/pom.xml
@@ -315,7 +315,7 @@
    <dependency>
      <groupId>com.github.sdorra</groupId>
      <artifactId>spotter-core</artifactId>
-      <version>2.1.2</version>
+      <version>3.0.0</version>
    </dependency>

    <dependency>
--- a/scm-webapp/src/main/java/sonia/scm/api/WebApplicationExceptionMapper.java
+++ b/scm-webapp/src/main/java/sonia/scm/api/WebApplicationExceptionMapper.java
@@ -0,0 +1,63 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020-present Cloudogu GmbH and Contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package sonia.scm.api;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.slf4j.MDC;
+import sonia.scm.api.v2.resources.ErrorDto;
+import sonia.scm.web.VndMediaType;
+
+import javax.ws.rs.WebApplicationException;
+import javax.ws.rs.core.Response;
+import javax.ws.rs.ext.ExceptionMapper;
+import javax.ws.rs.ext.Provider;
+import java.util.Collections;
+
+@Provider
+public class WebApplicationExceptionMapper implements ExceptionMapper<WebApplicationException> {
+
+  private static final Logger LOG = LoggerFactory.getLogger(WebApplicationExceptionMapper.class);
+
+  private static final String ERROR_CODE = "FVS9JY1T21";
+
+  @Override
+  public Response toResponse(WebApplicationException exception) {
+    LOG.trace("caught web application exception", exception);
+
+    ErrorDto errorDto = new ErrorDto();
+    errorDto.setMessage(exception.getMessage());
+    errorDto.setContext(Collections.emptyList());
+    errorDto.setErrorCode(ERROR_CODE);
+    errorDto.setTransactionId(MDC.get("transaction_id"));
+
+    Response originalResponse = exception.getResponse();
+
+    return Response.fromResponse(originalResponse)
+      .entity(errorDto)
+      .type(VndMediaType.ERROR_TYPE)
+      .build();
+  }
+}
--- a/scm-webapp/src/main/java/sonia/scm/api/v2/ContentTypeResolver.java
+++ b/scm-webapp/src/main/java/sonia/scm/api/v2/ContentTypeResolver.java
@@ -0,0 +1,51 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020-present Cloudogu GmbH and Contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package sonia.scm.api.v2;
+
+import com.github.sdorra.spotter.ContentType;
+import com.github.sdorra.spotter.ContentTypeDetector;
+import com.github.sdorra.spotter.Language;
+
+public final class ContentTypeResolver {
+
+  private static final ContentTypeDetector PATH_BASED = ContentTypeDetector.builder()
+    .defaultPathBased().boost(Language.MARKDOWN)
+    .bestEffortMatch();
+
+  private static final ContentTypeDetector PATH_AND_CONTENT_BASED = ContentTypeDetector.builder()
+    .defaultPathAndContentBased().boost(Language.MARKDOWN)
+    .bestEffortMatch();
+
+  private ContentTypeResolver() {
+  }
+
+  public static ContentType resolve(String path) {
+    return PATH_BASED.detect(path);
+  }
+
+  public static ContentType resolve(String path, byte[] contentPrefix) {
+    return PATH_AND_CONTENT_BASED.detect(path, contentPrefix);
+  }
+}
--- a/scm-webapp/src/main/java/sonia/scm/api/v2/resources/ContentResource.java
+++ b/scm-webapp/src/main/java/sonia/scm/api/v2/resources/ContentResource.java
@@ -25,7 +25,6 @@
 package sonia.scm.api.v2.resources;

 import com.github.sdorra.spotter.ContentType;
-import com.github.sdorra.spotter.ContentTypes;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.Parameter;
 import io.swagger.v3.oas.annotations.media.Content;
@@ -34,6 +33,7 @@ import io.swagger.v3.oas.annotations.responses.ApiResponse;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import sonia.scm.NotFoundException;
+import sonia.scm.api.v2.ContentTypeResolver;
 import sonia.scm.repository.NamespaceAndName;
 import sonia.scm.repository.api.RepositoryService;
 import sonia.scm.repository.api.RepositoryServiceFactory;
@@ -204,7 +204,7 @@ public class ContentResource {
  }

  private void appendContentHeader(String path, byte[] head, Response.ResponseBuilder responseBuilder) {
-    ContentType contentType = ContentTypes.detect(path, head);
+    ContentType contentType = ContentTypeResolver.resolve(path, head);
    responseBuilder.header("Content-Type", contentType.getRaw());
    contentType.getLanguage().ifPresent(
      language -> responseBuilder.header(ProgrammingLanguages.HEADER, ProgrammingLanguages.getValue(language))
--- a/scm-webapp/src/main/java/sonia/scm/api/v2/resources/DiffResultToDiffResultDtoMapper.java
+++ b/scm-webapp/src/main/java/sonia/scm/api/v2/resources/DiffResultToDiffResultDtoMapper.java
@@ -24,10 +24,10 @@

 package sonia.scm.api.v2.resources;

-import com.github.sdorra.spotter.ContentTypes;
 import com.github.sdorra.spotter.Language;
 import com.google.inject.Inject;
 import de.otto.edison.hal.Links;
+import sonia.scm.api.v2.ContentTypeResolver;
 import sonia.scm.repository.Repository;
 import sonia.scm.repository.api.DiffFile;
 import sonia.scm.repository.api.DiffLine;
@@ -120,7 +120,7 @@ class DiffResultToDiffResultDtoMapper {
    dto.setOldRevision(file.getOldRevision());


-    Optional<Language> language = ContentTypes.detect(path).getLanguage();
+    Optional<Language> language = ContentTypeResolver.resolve(path).getLanguage();
    language.ifPresent(value -> dto.setLanguage(ProgrammingLanguages.getValue(value)));

    List<DiffResultDto.HunkDto> hunks = new ArrayList<>();
--- a/scm-webapp/src/main/java/sonia/scm/api/v2/resources/SourceRootResource.java
+++ b/scm-webapp/src/main/java/sonia/scm/api/v2/resources/SourceRootResource.java
@@ -40,7 +40,6 @@ import javax.ws.rs.PathParam;
 import javax.ws.rs.Produces;
 import javax.ws.rs.QueryParam;
 import java.io.IOException;
-import java.net.URLDecoder;

 import static sonia.scm.ContextEntry.ContextBuilder.entity;
 import static sonia.scm.NotFoundException.notFound;
@@ -88,7 +87,7 @@ public class SourceRootResource {
      browseCommand.setPath(path);
      browseCommand.setOffset(offset);
      if (revision != null && !revision.isEmpty()) {
-        browseCommand.setRevision(URLDecoder.decode(revision, "UTF-8"));
+        browseCommand.setRevision(revision);
      }
      BrowserResult browserResult = browseCommand.getBrowserResult();

--- a/scm-webapp/src/main/java/sonia/scm/lifecycle/DefaultRestarter.java
+++ b/scm-webapp/src/main/java/sonia/scm/lifecycle/DefaultRestarter.java
@@ -31,9 +31,8 @@ import javax.inject.Singleton;

@Singleton
 public class DefaultRestarter implements Restarter {
-
-  private ScmEventBus eventBus;
-  private RestartStrategy strategy;
+  private final ScmEventBus eventBus;
+  private final RestartStrategy strategy;

  @Inject
  public DefaultRestarter() {
--- a/scm-webapp/src/main/java/sonia/scm/update/MigrationWizardServlet.java
+++ b/scm-webapp/src/main/java/sonia/scm/update/MigrationWizardServlet.java
@@ -61,6 +61,7 @@ import static java.util.Comparator.comparing;
 class MigrationWizardServlet extends HttpServlet {

  private static final Logger LOG = LoggerFactory.getLogger(MigrationWizardServlet.class);
+  static final String PROPERTY_WAIT_TIME = "sonia.scm.restart-migration.wait";

  private final XmlRepositoryV1UpdateStep repositoryV1UpdateStep;
  private final DefaultMigrationStrategyDAO migrationStrategyDao;
@@ -145,7 +146,7 @@ class MigrationWizardServlet extends HttpServlet {

    if (restarter.isSupported()) {
      respondWithTemplate(resp, model, "templates/repository-migration-restart.mustache");
-      restarter.restart(MigrationWizardServlet.class, "wrote migration data");
+      new Thread(this::restart).start();
    } else {
      respondWithTemplate(resp, model, "templates/repository-migration-manual-restart.mustache");
      LOG.error("Restarting is not supported on this platform.");
@@ -153,6 +154,19 @@ class MigrationWizardServlet extends HttpServlet {
    }
  }

+  private void restart() {
+    String wait = System.getProperty(PROPERTY_WAIT_TIME);
+    if (!Strings.isNullOrEmpty(wait)) {
+      try {
+        Thread.sleep(Long.parseLong(wait));
+      } catch (InterruptedException e) {
+        LOG.error("error on waiting before restart", e);
+        Thread.currentThread().interrupt();
+      }
+    }
+    restarter.restart(MigrationWizardServlet.class, "wrote migration data");
+  }
+
  private List<RepositoryLineEntry> getRepositoryLineEntries() {
    List<V1Repository> repositoriesWithoutMigrationStrategies =
      repositoryV1UpdateStep.getRepositoriesWithoutMigrationStrategies();
--- a/scm-webapp/src/main/java/sonia/scm/web/i18n/I18nServlet.java
+++ b/scm-webapp/src/main/java/sonia/scm/web/i18n/I18nServlet.java
@@ -31,14 +31,14 @@ import com.fasterxml.jackson.databind.node.ObjectNode;
 import com.github.legman.Subscribe;
 import com.google.common.annotations.VisibleForTesting;
 import com.google.inject.Singleton;
-import lombok.extern.slf4j.Slf4j;
-import sonia.scm.NotFoundException;
-import sonia.scm.SCMContext;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import sonia.scm.SCMContextProvider;
 import sonia.scm.Stage;
-import sonia.scm.lifecycle.RestartEvent;
 import sonia.scm.cache.Cache;
 import sonia.scm.cache.CacheManager;
 import sonia.scm.filter.WebElement;
+import sonia.scm.lifecycle.RestartEvent;
 import sonia.scm.plugin.PluginLoader;

 import javax.inject.Inject;
@@ -51,11 +51,6 @@ import java.net.URL;
 import java.util.Enumeration;
 import java.util.Iterator;
 import java.util.Optional;
-import java.util.function.BiConsumer;
-import java.util.function.Function;
-
-import static sonia.scm.ContextEntry.ContextBuilder.entity;
-import static sonia.scm.NotFoundException.notFound;


 /**
@@ -63,86 +58,90 @@ import static sonia.scm.NotFoundException.notFound;
 */
@Singleton
@WebElement(value = I18nServlet.PATTERN, regex = true)
-@Slf4j
 public class I18nServlet extends HttpServlet {

+  private static final Logger LOG = LoggerFactory.getLogger(I18nServlet.class);
+
  public static final String PLUGINS_JSON = "plugins.json";
  public static final String PATTERN = "/locales/[a-z\\-A-Z]*/" + PLUGINS_JSON;
  public static final String CACHE_NAME = "sonia.cache.plugins.translations";

+  private final SCMContextProvider context;
  private final ClassLoader classLoader;
  private final Cache<String, JsonNode> cache;
-  private static ObjectMapper objectMapper = new ObjectMapper();
+  private final ObjectMapper objectMapper = new ObjectMapper();


  @Inject
-  public I18nServlet(PluginLoader pluginLoader, CacheManager cacheManager) {
+  public I18nServlet(SCMContextProvider context, PluginLoader pluginLoader, CacheManager cacheManager) {
+    this.context = context;
    this.classLoader = pluginLoader.getUberClassLoader();
    this.cache = cacheManager.getCache(CACHE_NAME);
  }

  @Subscribe(async = false)
  public void handleRestartEvent(RestartEvent event) {
-    log.debug("Clear cache on restart event with reason {}", event.getReason());
+    LOG.debug("Clear cache on restart event with reason {}", event.getReason());
    cache.clear();
  }

-  private JsonNode getCollectedJson(String path,
-                                    Function<String, Optional<JsonNode>> jsonFileProvider,
-                                    BiConsumer<String, JsonNode> createdJsonFileConsumer) {
-    return Optional.ofNullable(jsonFileProvider.apply(path)
-      .orElseGet(() -> {
-          Optional<JsonNode> createdFile = collectJsonFile(path);
-          createdFile.ifPresent(map -> createdJsonFileConsumer.accept(path, map));
-          return createdFile.orElse(null);
-        }
-      )).orElseThrow(() -> notFound(entity("jsonprovider", path)));
-  }
-
  @VisibleForTesting
  @Override
-  protected void doGet(HttpServletRequest req, HttpServletResponse response) {
+  protected void doGet(HttpServletRequest request, HttpServletResponse response) {
+    String path = request.getServletPath();
+    try {
+      Optional<JsonNode> json = findJson(path);
+      if (json.isPresent()) {
+        write(response, json.get());
+      } else {
+        LOG.debug("could not find translation at {}", path);
+        response.setStatus(HttpServletResponse.SC_NOT_FOUND);
+      }
+    } catch (IOException ex) {
+      LOG.error("Error on getting the translation of the plugins", ex);
+      response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
+    }
+  }
+
+  private void write(HttpServletResponse response, JsonNode jsonNode) throws IOException {
    response.setCharacterEncoding("UTF-8");
    response.setContentType("application/json");
    response.setHeader("Cache-Control", "no-cache");
-    try (PrintWriter out = response.getWriter()) {
-      String path = req.getServletPath();
-      Function<String, Optional<JsonNode>> jsonFileProvider = usedPath -> Optional.empty();
-      BiConsumer<String, JsonNode> createdJsonFileConsumer = (usedPath, jsonNode) -> log.debug("A json File is created from the path {}", usedPath);
+
+    try (PrintWriter writer = response.getWriter()) {
+      objectMapper.writeValue(writer, jsonNode);
+    }
+  }
+
+  public Optional<JsonNode> findJson(String path) throws IOException {
    if (isProductionStage()) {
-        log.debug("In Production Stage get the plugin translations from the cache");
-        jsonFileProvider = usedPath -> Optional.ofNullable(
-          cache.get(usedPath));
-        createdJsonFileConsumer = createdJsonFileConsumer
-          .andThen((usedPath, jsonNode) -> log.debug("Put the created json File in the cache with the key {}", usedPath))
-          .andThen(cache::put);
+      return findJsonCached(path);
    }
-      objectMapper.writeValue(out, getCollectedJson(path, jsonFileProvider, createdJsonFileConsumer));
-    } catch (IOException e) {
-      log.error("Error on getting the translation of the plugins", e);
-      response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
-    } catch (NotFoundException e) {
-      log.error("Plugin translations are not found", e);
-      response.setStatus(HttpServletResponse.SC_NOT_FOUND);
+    return collectJsonFile(path);
  }
+
+  private Optional<JsonNode> findJsonCached(String path) throws IOException {
+    JsonNode jsonNode = cache.get(path);
+    if (jsonNode != null) {
+      LOG.debug("return json node from cache for path {}", path);
+      return Optional.of(jsonNode);
+    }
+
+    LOG.debug("collect json for path {}", path);
+    Optional<JsonNode> collected = collectJsonFile(path);
+    collected.ifPresent(node -> cache.put(path, node));
+    return collected;
  }

  @VisibleForTesting
  protected boolean isProductionStage() {
-    return SCMContext.getContext().getStage() == Stage.PRODUCTION;
+    return context.getStage() == Stage.PRODUCTION;
  }

-  /**
-   * Return a collected Json File as JsonNode from the given path from all plugins in the class path
-   *
-   * @param path the searched resource path
-   * @return a collected Json File as JsonNode from the given path from all plugins in the class path
-   */
  @VisibleForTesting
-  protected Optional<JsonNode> collectJsonFile(String path) {
-    log.debug("Collect plugin translations from path {} for every plugin", path);
+  private Optional<JsonNode> collectJsonFile(String path) throws IOException {
+    LOG.debug("Collect plugin translations from path {} for every plugin", path);
    JsonNode mergedJsonNode = null;
-    try {
    Enumeration<URL> resources = classLoader.getResources(path.replaceFirst("/", ""));
    while (resources.hasMoreElements()) {
      URL url = resources.nextElement();
@@ -153,32 +152,15 @@ public class I18nServlet extends HttpServlet {
        mergedJsonNode = jsonNode;
      }
    }
-    } catch (IOException e) {
-      log.error("Error on loading sources from {}", path, e);
-      return Optional.empty();
-    }
+
    return Optional.ofNullable(mergedJsonNode);
  }

-
-  /**
-   * Merge the <code>updateNode</code> into the <code>mainNode</code> and return it.
-   *
-   * This is not a deep merge.
-   *
-   * @param mainNode the main node
-   * @param updateNode the update node
-   * @return the merged mainNode
-   */
-  @VisibleForTesting
-  protected JsonNode merge(JsonNode mainNode, JsonNode updateNode) {
+  private JsonNode merge(JsonNode mainNode, JsonNode updateNode) {
    Iterator<String> fieldNames = updateNode.fieldNames();
-
    while (fieldNames.hasNext()) {
-
      String fieldName = fieldNames.next();
      JsonNode jsonNode = mainNode.get(fieldName);
-
      if (jsonNode != null) {
        mergeNode(updateNode, fieldName, jsonNode);
      } else {
--- a/scm-webapp/src/main/resources/locales/de/plugins.json
+++ b/scm-webapp/src/main/resources/locales/de/plugins.json
@@ -268,6 +268,10 @@
    "BxS5wX2v71": {
      "displayName": "Inkorrekter Schlüssel",
      "description": "Der bereitgestellte Schlüssel ist kein korrekt formartierter öffentlicher Schlüssel."
+    },
+    "FVS9JY1T21": {
+      "displayName": "Fehler bei der Anfrage",
+      "description": "Bei der Anfrage trat ein Fehler auf. Prüfen Sie bitte den Status der HTTP Antwort und die konkrete Meldung."
    }
  },
  "namespaceStrategies": {
--- a/scm-webapp/src/main/resources/locales/en/plugins.json
+++ b/scm-webapp/src/main/resources/locales/en/plugins.json
@@ -268,6 +268,10 @@
    "BxS5wX2v71": {
      "displayName": "Invalid key",
      "description": "The provided key is not a valid public key."
+    },
+    "FVS9JY1T21": {
+      "displayName": "Error in the request",
+      "description": "While processing the request there was an error. Please check the http return status and the concrete error message."
    }
  },
  "namespaceStrategies": {
--- a/scm-webapp/src/test/java/sonia/scm/api/v2/ContentTypeResolverTest.java
+++ b/scm-webapp/src/test/java/sonia/scm/api/v2/ContentTypeResolverTest.java
@@ -0,0 +1,65 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020-present Cloudogu GmbH and Contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package sonia.scm.api.v2;
+
+import com.github.sdorra.spotter.ContentType;
+import com.github.sdorra.spotter.Language;
+import org.junit.jupiter.api.Test;
+
+import java.nio.charset.StandardCharsets;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class ContentTypeResolverTest {
+
+  @Test
+  void shouldResolveMarkdown() {
+    String content = String.join("\n",
+      "% Markdown content",
+      "% Which does not start with markdown"
+    );
+    ContentType contentType = ContentTypeResolver.resolve("somedoc.md", content.getBytes(StandardCharsets.UTF_8));
+    assertThat(contentType.getLanguage()).contains(Language.MARKDOWN);
+  }
+
+  @Test
+  void shouldResolveMarkdownWithoutContent() {
+    ContentType contentType = ContentTypeResolver.resolve("somedoc.md");
+    assertThat(contentType.getLanguage()).contains(Language.MARKDOWN);
+  }
+
+  @Test
+  void shouldResolveMarkdownEvenWithDotsInFilename() {
+    ContentType contentType = ContentTypeResolver.resolve("somedoc.1.1.md");
+    assertThat(contentType.getLanguage()).contains(Language.MARKDOWN);
+  }
+
+  @Test
+  void shouldResolveDockerfile() {
+    ContentType contentType = ContentTypeResolver.resolve("Dockerfile");
+    assertThat(contentType.getLanguage()).contains(Language.DOCKERFILE);
+  }
+
+}
--- a/scm-webapp/src/test/java/sonia/scm/lifecycle/DefaultRestarterTest.java
+++ b/scm-webapp/src/test/java/sonia/scm/lifecycle/DefaultRestarterTest.java
@@ -23,7 +23,6 @@
 */
 package sonia.scm.lifecycle;

-import com.github.legman.Subscribe;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
 import org.mockito.ArgumentCaptor;
@@ -32,8 +31,6 @@ import org.mockito.Mock;
 import org.mockito.junit.jupiter.MockitoExtension;
 import sonia.scm.event.ScmEventBus;

-import javax.swing.*;
-
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.junit.jupiter.api.Assertions.assertThrows;
 import static org.mockito.Mockito.verify;
--- a/scm-webapp/src/test/java/sonia/scm/update/MigrationWizardServletTest.java
+++ b/scm-webapp/src/test/java/sonia/scm/update/MigrationWizardServletTest.java
@@ -24,6 +24,7 @@

 package sonia.scm.update;

+import com.google.common.base.Stopwatch;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
@@ -37,13 +38,19 @@ import sonia.scm.update.repository.XmlRepositoryV1UpdateStep;

 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
+import java.time.Duration;
 import java.util.Collections;
 import java.util.Map;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;

 import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.doAnswer;
 import static org.mockito.Mockito.doReturn;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
+import static sonia.scm.update.MigrationWizardServlet.PROPERTY_WAIT_TIME;

@ExtendWith(MockitoExtension.class)
 class MigrationWizardServletTest {
@@ -262,4 +269,58 @@ class MigrationWizardServletTest {

    verify(migrationStrategyDao).set("id", "git", "name", MigrationStrategy.COPY, "namespace", "name");
  }
+
+  @Test
+  void shouldRestartAfterValidMigration() throws InterruptedException {
+
+    when(updateStep.getRepositoriesWithoutMigrationStrategies()).thenReturn(
+      Collections.singletonList(new V1Repository("id", "git", "name"))
+    );
+    doReturn("namespace").when(request).getParameter("namespace-id");
+    doReturn("name").when(request).getParameter("name-id");
+    doReturn("COPY").when(request).getParameter("strategy-id");
+
+    final CountDownLatch countDownLatch = new CountDownLatch(1);
+    when(restarter.isSupported()).thenReturn(true);
+    doAnswer(ic -> {
+      countDownLatch.countDown();
+      return null;
+    }).when(restarter).restart(any(), any());
+
+    servlet.doPost(request, response);
+
+    boolean restarted = countDownLatch.await(500L, TimeUnit.MILLISECONDS);
+
+    assertThat(restarted).isTrue();
+  }
+
+  @Test
+  void shouldRestartAfterValidMigrationWithSystemProperty() throws InterruptedException {
+    System.setProperty(PROPERTY_WAIT_TIME, "100");
+    Stopwatch stopwatch = Stopwatch.createStarted();
+
+    when(updateStep.getRepositoriesWithoutMigrationStrategies()).thenReturn(
+      Collections.singletonList(new V1Repository("id", "git", "name"))
+    );
+    doReturn("namespace").when(request).getParameter("namespace-id");
+    doReturn("name").when(request).getParameter("name-id");
+    doReturn("COPY").when(request).getParameter("strategy-id");
+
+    final CountDownLatch countDownLatch = new CountDownLatch(1);
+    when(restarter.isSupported()).thenReturn(true);
+    doAnswer(ic -> {
+      stopwatch.stop();
+      countDownLatch.countDown();
+      return null;
+    }).when(restarter).restart(any(), any());
+
+    servlet.doPost(request, response);
+
+    boolean restarted = countDownLatch.await(750L, TimeUnit.MILLISECONDS);
+
+    assertThat(stopwatch.elapsed()).isGreaterThanOrEqualTo(Duration.ofMillis(100L));
+    assertThat(restarted).isTrue();
+
+    System.clearProperty(PROPERTY_WAIT_TIME);
+  }
 }
--- a/scm-webapp/src/test/java/sonia/scm/web/i18n/I18nServletTest.java
+++ b/scm-webapp/src/test/java/sonia/scm/web/i18n/I18nServletTest.java
@@ -26,44 +26,38 @@ package sonia.scm.web.i18n;

 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
-import com.google.common.base.Charsets;
-import com.google.common.io.Files;
+import com.github.legman.EventBus;
 import org.apache.commons.lang3.StringUtils;
-import org.assertj.core.util.Lists;
-import org.junit.Before;
-import org.junit.Rule;
-import org.junit.Test;
-import org.junit.rules.TemporaryFolder;
-import org.junit.runner.RunWith;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.junit.jupiter.api.io.TempDir;
 import org.mockito.Mock;
-import org.mockito.MockSettings;
-import org.mockito.internal.creation.MockSettingsImpl;
-import org.mockito.invocation.InvocationOnMock;
-import org.mockito.junit.MockitoJUnitRunner;
-import sonia.scm.lifecycle.RestartEvent;
+import org.mockito.junit.jupiter.MockitoExtension;
+import sonia.scm.SCMContextProvider;
+import sonia.scm.Stage;
 import sonia.scm.cache.Cache;
 import sonia.scm.cache.CacheManager;
-import sonia.scm.event.ScmEventBus;
 import sonia.scm.lifecycle.RestartEventFactory;
 import sonia.scm.plugin.PluginLoader;

 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
-import java.io.File;
-import java.io.FileOutputStream;
+import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.PrintWriter;
 import java.net.URL;
-import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Path;
+import java.util.Arrays;
 import java.util.Collections;
 import java.util.Enumeration;
-import java.util.Optional;

 import static org.assertj.core.api.Assertions.assertThat;
 import static org.mockito.Mockito.*;

-@RunWith(MockitoJUnitRunner.Silent.class)
-public class I18nServletTest {
+@ExtendWith(MockitoExtension.class)
+class I18nServletTest {

  private static final String GIT_PLUGIN_JSON = json(
    "{",
@@ -76,6 +70,7 @@ public class I18nServletTest {
      "}",
    "}"
  );
+
  private static final String HG_PLUGIN_JSON = json(
    "{",
      "'scm-hg-plugin': {",
@@ -87,7 +82,8 @@ public class I18nServletTest {
      "}",
    "}"
  );
-  private static String SVN_PLUGIN_JSON = json(
+
+  private static final String SVN_PLUGIN_JSON = json(
    "{",
      "'scm-svn-plugin': {",
        "'information': {",
@@ -101,59 +97,49 @@ public class I18nServletTest {
    return String.join("\n", parts ).replaceAll("'", "\"");
  }

-  @Rule
-  public TemporaryFolder temporaryFolder = new TemporaryFolder();
+  @Mock
+  private SCMContextProvider context;

  @Mock
  private PluginLoader pluginLoader;

+  @Mock
+  private ClassLoader classLoader;
+
  @Mock
  private CacheManager cacheManager;

  @Mock
-  private ClassLoader classLoader;
+  private Cache<String, JsonNode> cache;

  private I18nServlet servlet;

-  @Mock
-  private Cache cache;
-  private Enumeration<URL> resources;

-  @Before
-  @SuppressWarnings("unchecked")
-  public void init() throws IOException {
-    resources = Collections.enumeration(Lists.newArrayList(
-      createFileFromString(SVN_PLUGIN_JSON).toURI().toURL(),
-      createFileFromString(GIT_PLUGIN_JSON).toURI().toURL(),
-      createFileFromString(HG_PLUGIN_JSON).toURI().toURL()
-    ));
+  @BeforeEach
+  void init() {
    when(pluginLoader.getUberClassLoader()).thenReturn(classLoader);
-    when(cacheManager.getCache(I18nServlet.CACHE_NAME)).thenReturn(cache);
-    MockSettings settings = new MockSettingsImpl<>();
-    settings.useConstructor(pluginLoader, cacheManager);
-    settings.defaultAnswer(InvocationOnMock::callRealMethod);
-    servlet = mock(I18nServlet.class, settings);
+    when(cacheManager.<String, JsonNode>getCache(I18nServlet.CACHE_NAME)).thenReturn(cache);
+    servlet = new I18nServlet(context, pluginLoader, cacheManager);
  }

  @Test
-  public void shouldCleanCacheOnRestartEvent() {
-    ScmEventBus.getInstance().register(servlet);
-
-    ScmEventBus.getInstance().post(RestartEventFactory.create(I18nServlet.class, "Restart to reload the plugin resources"));
+  void shouldCleanCacheOnRestartEvent() {
+    EventBus eventBus = new EventBus("forTestingOnly");
+    eventBus.register(servlet);
+    eventBus.post(RestartEventFactory.create(I18nServlet.class, "Restart to reload the plugin resources"));

    verify(cache).clear();
  }

  @Test
-  @SuppressWarnings("unchecked")
-  public void shouldFailWith404OnMissingResources() throws IOException {
+  void shouldFailWith404OnMissingResources() throws IOException {
    String path = "/locales/de/plugins.json";
    HttpServletRequest request = mock(HttpServletRequest.class);
    HttpServletResponse response = mock(HttpServletResponse.class);
-    PrintWriter writer = mock(PrintWriter.class);
-    when(response.getWriter()).thenReturn(writer);
    when(request.getServletPath()).thenReturn(path);
-    when(classLoader.getResources("locales/de/plugins.json")).thenThrow(IOException.class);
+    when(classLoader.getResources("locales/de/plugins.json")).thenReturn(
+      I18nServlet.class.getClassLoader().getResources("something/not/available")
+    );

    servlet.doGet(request, response);

@@ -161,98 +147,96 @@ public class I18nServletTest {
  }

  @Test
-  @SuppressWarnings("unchecked")
-  public void shouldFailWith500OnIOException() throws IOException {
+  void shouldFailWith500OnIOException() throws IOException {
+    stage(Stage.DEVELOPMENT);
    HttpServletRequest request = mock(HttpServletRequest.class);
+    when(request.getServletPath()).thenReturn("/locales/de/plugins.json");
    HttpServletResponse response = mock(HttpServletResponse.class);
-    doThrow(IOException.class).when(response).getWriter();
+    when(classLoader.getResources("locales/de/plugins.json")).thenThrow(new IOException("failed"));

    servlet.doGet(request, response);

    verify(response).setStatus(500);
  }

+  private void stage(Stage stage) {
+    when(context.getStage()).thenReturn(stage);
+  }
+
  @Test
-  @SuppressWarnings("unchecked")
-  public void inDevelopmentStageShouldNotUseCache() throws IOException {
-    String path = "/locales/de/plugins.json";
-    when(servlet.isProductionStage()).thenReturn(false);
+  void inDevelopmentStageShouldNotUseCache(@TempDir Path temp) throws IOException {
+    stage(Stage.DEVELOPMENT);
+    mockResources(temp, "locales/de/plugins.json");
    HttpServletRequest request = mock(HttpServletRequest.class);
+    when(request.getServletPath()).thenReturn("/locales/de/plugins.json");
+
    HttpServletResponse response = mock(HttpServletResponse.class);
-    File file = temporaryFolder.newFile();
-    PrintWriter writer = new PrintWriter(new FileOutputStream(file));
-    when(response.getWriter()).thenReturn(writer);
-    when(request.getServletPath()).thenReturn(path);
-    when(classLoader.getResources("locales/de/plugins.json")).thenReturn(resources);
+    String json = doGetString(request, response);

-    servlet.doGet(request, response);
-
-    String json = Files.readLines(file, Charset.defaultCharset()).get(0);
    assertJson(json);
    verify(cache, never()).get(any());
  }

-  @Test
-  @SuppressWarnings("unchecked")
-  public void inProductionStageShouldUseCache() throws IOException {
-    String path = "/locales/de/plugins.json";
-    when(servlet.isProductionStage()).thenReturn(true);
-    HttpServletRequest request = mock(HttpServletRequest.class);
-    HttpServletResponse response = mock(HttpServletResponse.class);
-    File file = temporaryFolder.newFile();
-    PrintWriter writer = new PrintWriter(new FileOutputStream(file));
+  private String doGetString(HttpServletRequest request, HttpServletResponse response) throws IOException {
+    ByteArrayOutputStream baos = new ByteArrayOutputStream();
+    PrintWriter writer = new PrintWriter(baos);
    when(response.getWriter()).thenReturn(writer);
-    when(request.getServletPath()).thenReturn(path);
-    when(classLoader.getResources("locales/de/plugins.json")).thenReturn(resources);

    servlet.doGet(request, response);

-    String json = Files.readLines(file, Charset.defaultCharset()).get(0);
-    assertJson(json);
-    verify(cache).get(path);
-    verify(cache).put(eq(path), any());
+    writer.flush();
+    return baos.toString(StandardCharsets.UTF_8.name());
+  }

+  private void mockResources(Path directory, String resourcePath) throws IOException {
+    Enumeration<URL> resources = Collections.enumeration(
+      Arrays.asList(
+        toURL(directory, "git.json", GIT_PLUGIN_JSON),
+        toURL(directory, "hg.json", HG_PLUGIN_JSON),
+        toURL(directory, "svn.json", SVN_PLUGIN_JSON)
+      )
+    );
+    when(classLoader.getResources(resourcePath)).thenReturn(resources);
+  }
+
+  private URL toURL(Path directory, String name, String content) throws IOException {
+    Path file = directory.resolve(name);
+    java.nio.file.Files.write(file, content.getBytes(StandardCharsets.UTF_8));
+    return file.toUri().toURL();
+  }
+
+  @Test
+  void shouldGetFromCacheInProductionStage() throws IOException {
+    String path = "/locales/de/plugins.json";
+    stage(Stage.PRODUCTION);
+    HttpServletRequest request = mock(HttpServletRequest.class);
+    when(request.getServletPath()).thenReturn(path);
+    HttpServletResponse response = mock(HttpServletResponse.class);
+
+    ObjectMapper mapper = new ObjectMapper();
+    JsonNode jsonNode = mapper.readTree(GIT_PLUGIN_JSON);
+    when(cache.get(path)).thenReturn(jsonNode);
+
+    String json = doGetString(request, response);
+    assertThat(json).contains("scm-git-plugin").doesNotContain("scm-hg-plugin");
    verifyHeaders(response);
  }

  @Test
-  @SuppressWarnings("unchecked")
-  public void inProductionStageShouldGetFromCache() throws IOException {
+  void shouldStoreToCacheInProductionStage(@TempDir Path temp) throws IOException {
    String path = "/locales/de/plugins.json";
-    when(servlet.isProductionStage()).thenReturn(true);
+    mockResources(temp, "locales/de/plugins.json");
+    stage(Stage.PRODUCTION);
    HttpServletRequest request = mock(HttpServletRequest.class);
-    HttpServletResponse response = mock(HttpServletResponse.class);
-    File file = temporaryFolder.newFile();
-    PrintWriter writer = new PrintWriter(new FileOutputStream(file));
-    when(response.getWriter()).thenReturn(writer);
    when(request.getServletPath()).thenReturn(path);
-    when(classLoader.getResources("locales/de/plugins.json")).thenReturn(resources);
-    ObjectMapper objectMapper = new ObjectMapper();
-    JsonNode node = objectMapper.readTree(GIT_PLUGIN_JSON);
-    node = servlet.merge(node, objectMapper.readTree(HG_PLUGIN_JSON));
-    node = servlet.merge(node, objectMapper.readTree(SVN_PLUGIN_JSON));
-    when(cache.get(path)).thenReturn(node);
+    HttpServletResponse response = mock(HttpServletResponse.class);

-    servlet.doGet(request, response);
+    String json = doGetString(request, response);

-    String json = Files.readLines(file, Charset.defaultCharset()).get(0);
-    verify(servlet, never()).collectJsonFile(path);
-    verify(cache, never()).put(eq(path), any());
-    verify(cache).get(path);
-    assertJson(json);
+    verify(cache).put(any(String.class), any(JsonNode.class));

    verifyHeaders(response);
-  }
-
-  @Test
-  @SuppressWarnings("unchecked")
-  public void shouldCollectJsonFile() throws IOException {
-    String path = "locales/de/plugins.json";
-    when(classLoader.getResources(path)).thenReturn(resources);
-
-    Optional<JsonNode> jsonNodeOptional = servlet.collectJsonFile("/" + path);
-
-    assertJson(jsonNodeOptional.orElse(null));
+    assertJson(json);
  }

  private void verifyHeaders(HttpServletResponse response) {
@@ -261,22 +245,11 @@ public class I18nServletTest {
    verify(response).setHeader("Cache-Control", "no-cache");
  }

-  public void assertJson(JsonNode actual) throws IOException {
-    assertJson(actual.toString());
-  }
-
-  private void assertJson(String actual) throws IOException {
+  private void assertJson(String actual) {
    assertThat(actual)
      .isNotEmpty()
      .contains(StringUtils.deleteWhitespace(GIT_PLUGIN_JSON.substring(1, GIT_PLUGIN_JSON.length() - 1)))
      .contains(StringUtils.deleteWhitespace(HG_PLUGIN_JSON.substring(1, HG_PLUGIN_JSON.length() - 1)))
      .contains(StringUtils.deleteWhitespace(SVN_PLUGIN_JSON.substring(1, SVN_PLUGIN_JSON.length() - 1)));
  }
-
-  private File createFileFromString(String json) throws IOException {
-    File file = temporaryFolder.newFile();
-    Files.write(json.getBytes(Charsets.UTF_8), file);
-    return file;
-  }
-
 }
--- a/yarn.lock
+++ b/yarn.lock
@@ -3397,6 +3397,13 @@
    "@types/prop-types" "*"
    csstype "^2.2.0"

+"@types/redux-logger@^3.0.8":
+  version "3.0.8"
+  resolved "https://registry.yarnpkg.com/@types/redux-logger/-/redux-logger-3.0.8.tgz#1fb6d26917bb198792bb1cf57feb31cae1532c5d"
+  integrity sha512-zM+cxiSw6nZtRbxpVp9SE3x/X77Z7e7YAfHD1NkxJyJbAGSXJGF0E9aqajZfPOa/sTYnuwutmlCldveExuCeLw==
+  dependencies:
+    redux "^4.0.0"
+
 "@types/sinonjs__fake-timers@^6.0.1":
  version "6.0.1"
  resolved "https://registry.yarnpkg.com/@types/sinonjs__fake-timers/-/sinonjs__fake-timers-6.0.1.tgz#681df970358c82836b42f989188d133e218c458e"
@@ -4287,6 +4294,11 @@ babel-code-frame@^6.22.0:
    esutils "^2.0.2"
    js-tokens "^3.0.2"

+babel-core@7.0.0-bridge.0:
+  version "7.0.0-bridge.0"
+  resolved "https://registry.yarnpkg.com/babel-core/-/babel-core-7.0.0-bridge.0.tgz#95a492ddd90f9b4e9a4a1da14eb335b87b634ece"
+  integrity sha512-poPX9mZH/5CSanm50Q+1toVci6pv5KSRv/5TWCwtzQS5XEwn40BcCrgIeMFWP9CKKIniKXNxoIOnOq4VVlGXhg==
+
 babel-eslint@^10.0.3:
  version "10.1.0"
  resolved "https://registry.yarnpkg.com/babel-eslint/-/babel-eslint-10.1.0.tgz#6968e568a910b78fb3779cdd8b6ac2f479943232"
@@ -7786,7 +7798,7 @@ fast-levenshtein@^2.0.6, fast-levenshtein@~2.0.6:
  resolved "https://registry.yarnpkg.com/fast-levenshtein/-/fast-levenshtein-2.0.6.tgz#3d8a5c66883a16a30ca8643e851f19baa7797917"
  integrity sha1-PYpcZog6FqMMqGQ+hR8Zuqd5eRc=

-fault@^1.0.0, fault@^1.0.2:
+fault@^1.0.0:
  version "1.0.4"
  resolved "https://registry.yarnpkg.com/fault/-/fault-1.0.4.tgz#eafcfc0a6d214fc94601e170df29954a4f842f13"
  integrity sha512-CJ0HCB5tL5fYTEA7ToAq5+kTwd++Borf1/bifxd9iT70QcXr4MRrO3Llf8Ifs70q+SJcGHFtnIE/Nw6giCtECA==
@@ -8362,7 +8374,7 @@ gitconfiglocal@^1.0.0:
  dependencies:
    ini "^1.3.2"

-gitdiff-parser@^0.1.2:
+gitdiff-parser@^0.1.2, "gitdiff-parser@https://github.com/scm-manager/gitdiff-parser#617747460280bf4522bb84d217a9064ac8eb6d3d":
  version "0.1.2"
  resolved "https://github.com/scm-manager/gitdiff-parser#617747460280bf4522bb84d217a9064ac8eb6d3d"

@@ -11350,7 +11362,7 @@ lower-case@^2.0.1:
  dependencies:
    tslib "^1.10.0"

-lowlight@^1.13.0:
+lowlight@1.13.1, lowlight@^1.13.0, lowlight@~1.11.0:
  version "1.13.1"
  resolved "https://registry.yarnpkg.com/lowlight/-/lowlight-1.13.1.tgz#c4f0e03906ebd23fedf2d258f6ab2f6324cf90eb"
  integrity sha512-kQ71/T6RksEVz9AlPq07/2m+SU/1kGvt9k39UtvHX760u4SaWakaYH7hYgH5n6sTsCWk4MVYzUzLU59aN5CSmQ==
@@ -11358,14 +11370,6 @@ lowlight@^1.13.0:
    fault "^1.0.0"
    highlight.js "~9.16.0"

-lowlight@~1.11.0:
-  version "1.11.0"
-  resolved "https://registry.yarnpkg.com/lowlight/-/lowlight-1.11.0.tgz#1304d83005126d4e8b1dc0f07981e9b689ec2efc"
-  integrity sha512-xrGGN6XLL7MbTMdPD6NfWPwY43SNkjf/d0mecSx/CW36fUZTjRHEq0/Cdug3TWKtRXLWi7iMl1eP0olYxj/a4A==
-  dependencies:
-    fault "^1.0.2"
-    highlight.js "~9.13.0"
-
 lru-cache@^5.1.1:
  version "5.1.1"
  resolved "https://registry.yarnpkg.com/lru-cache/-/lru-cache-5.1.1.tgz#1da27e6710271947695daf6848e847f01d84b920"
@@ -11715,20 +11719,20 @@ mini-create-react-context@^0.4.0:
    "@babel/runtime" "^7.5.5"
    tiny-warning "^1.0.3"

-mini-css-extract-plugin@^0.7.0:
-  version "0.7.0"
-  resolved "https://registry.yarnpkg.com/mini-css-extract-plugin/-/mini-css-extract-plugin-0.7.0.tgz#5ba8290fbb4179a43dd27cca444ba150bee743a0"
-  integrity sha512-RQIw6+7utTYn8DBGsf/LpRgZCJMpZt+kuawJ/fju0KiOL6nAaTBNmCJwS7HtwSCXfS47gCkmtBFS7HdsquhdxQ==
+mini-css-extract-plugin@^0.10.0:
+  version "0.10.1"
+  resolved "https://registry.yarnpkg.com/mini-css-extract-plugin/-/mini-css-extract-plugin-0.10.1.tgz#2592c891f965e15750da6a6c0b60740b5b0cb62d"
+  integrity sha512-9B10gZixtNjHerADBrMxPXM5G0uL0CRGMcLRV67I8nd1SKbwJrI0okKUzD+PxKsUZ9Dxt8/hPvtzF0DrRnrOyA==
  dependencies:
    loader-utils "^1.1.0"
    normalize-url "1.9.1"
    schema-utils "^1.0.0"
    webpack-sources "^1.1.0"

-mini-css-extract-plugin@^0.9.0:
-  version "0.9.0"
-  resolved "https://registry.yarnpkg.com/mini-css-extract-plugin/-/mini-css-extract-plugin-0.9.0.tgz#47f2cf07aa165ab35733b1fc97d4c46c0564339e"
-  integrity sha512-lp3GeY7ygcgAmVIcRPBVhIkf8Us7FZjA+ILpal44qLdSu11wmjKQ3d9k15lfD7pO4esu9eUIAW7qiYIBppv40A==
+mini-css-extract-plugin@^0.7.0:
+  version "0.7.0"
+  resolved "https://registry.yarnpkg.com/mini-css-extract-plugin/-/mini-css-extract-plugin-0.7.0.tgz#5ba8290fbb4179a43dd27cca444ba150bee743a0"
+  integrity sha512-RQIw6+7utTYn8DBGsf/LpRgZCJMpZt+kuawJ/fju0KiOL6nAaTBNmCJwS7HtwSCXfS47gCkmtBFS7HdsquhdxQ==
  dependencies:
    loader-utils "^1.1.0"
    normalize-url "1.9.1"