add deprecation warning for legacy 3rd party plugins

src/core/server/legacy/legacy_service.test.mocks.ts

@@ -30,6 +30,11 @@ export const findLegacyPluginSpecsMock = jest.fn().mockImplementation((settings:
   uiExports: {},
   navLinks: [],
 }));
-jest.doMock('./plugins/find_legacy_plugin_specs.ts', () => ({
+jest.doMock('./plugins/find_legacy_plugin_specs', () => ({
   findLegacyPluginSpecs: findLegacyPluginSpecsMock,
 }));
+
+export const logLegacyThirdPartyPluginDeprecationWarningMock = jest.fn();
+jest.doMock('./plugins/log_legacy_plugins_warning', () => ({
+  logLegacyThirdPartyPluginDeprecationWarning: logLegacyThirdPartyPluginDeprecationWarningMock,
+}));

src/core/server/legacy/legacy_service.test.ts

@@ -22,7 +22,10 @@ jest.mock('../../../cli/cluster/cluster_manager');
 jest.mock('./config/legacy_deprecation_adapters', () => ({
   convertLegacyDeprecationProvider: (provider: any) => Promise.resolve(provider),
 }));
-import { findLegacyPluginSpecsMock } from './legacy_service.test.mocks';
+import {
+  findLegacyPluginSpecsMock,
+  logLegacyThirdPartyPluginDeprecationWarningMock,
+} from './legacy_service.test.mocks';
 
 import { BehaviorSubject, throwError } from 'rxjs';
 
@@ -474,6 +477,38 @@ describe('#discoverPlugins()', () => {
     expect(configService.addDeprecationProvider).toHaveBeenCalledWith('', 'providerA');
     expect(configService.addDeprecationProvider).toHaveBeenCalledWith('', 'providerB');
   });
+
+  it(`logs deprecations for legacy third party plugins`, async () => {
+    const pluginSpecs = [
+      { getId: () => 'pluginA', getDeprecationsProvider: () => undefined },
+      { getId: () => 'pluginB', getDeprecationsProvider: () => undefined },
+    ];
+    findLegacyPluginSpecsMock.mockImplementation(
+      settings =>
+        Promise.resolve({
+          pluginSpecs,
+          pluginExtendedConfig: settings,
+          disabledPluginSpecs: [],
+          uiExports: {},
+          navLinks: [],
+        }) as any
+    );
+
+    const legacyService = new LegacyService({
+      coreId,
+      env,
+      logger,
+      configService: configService as any,
+    });
+
+    await legacyService.discoverPlugins();
+
+    expect(logLegacyThirdPartyPluginDeprecationWarningMock).toHaveBeenCalledTimes(1);
+    expect(logLegacyThirdPartyPluginDeprecationWarningMock).toHaveBeenCalledWith({
+      specs: pluginSpecs,
+      log: expect.any(Object),
+    });
+  });
 });
 
 test('Sets the server.uuid property on the legacy configuration', async () => {

src/core/server/legacy/legacy_service.ts

@@ -28,7 +28,7 @@ import { DevConfig, DevConfigType, config as devConfig } from '../dev';
 import { BasePathProxyServer, HttpConfig, HttpConfigType, config as httpConfig } from '../http';
 import { Logger } from '../logging';
 import { PathConfigType } from '../path';
-import { findLegacyPluginSpecs } from './plugins';
+import { findLegacyPluginSpecs, logLegacyThirdPartyPluginDeprecationWarning } from './plugins';
 import { convertLegacyDeprecationProvider } from './config';
 import {
   ILegacyInternals,
@@ -133,6 +133,11 @@ export class LegacyService implements CoreService {
       this.coreContext.env.packageInfo
     );
 
+    logLegacyThirdPartyPluginDeprecationWarning({
+      specs: pluginSpecs,
+      log: this.log,
+    });
+
     this.legacyPlugins = {
       pluginSpecs,
       disabledPluginSpecs,

src/core/server/legacy/plugins/index.ts

@@ -18,3 +18,4 @@
  */
 
 export { findLegacyPluginSpecs } from './find_legacy_plugin_specs';
+export { logLegacyThirdPartyPluginDeprecationWarning } from './log_legacy_plugins_warning';

src/core/server/legacy/plugins/log_legacy_plugins_warning.test.ts

@@ -0,0 +1,90 @@
+/*
+ * Licensed to Elasticsearch B.V. under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch B.V. licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+import { loggerMock } from '../../logging/logger.mock';
+import { logLegacyThirdPartyPluginDeprecationWarning } from './log_legacy_plugins_warning';
+import { LegacyPluginSpec } from '../types';
+
+const createPluginSpec = ({ id, path }: { id: string; path: string }): LegacyPluginSpec => {
+  return {
+    getId: () => id,
+    getExpectedKibanaVersion: () => 'kibana',
+    getConfigPrefix: () => 'plugin.config',
+    getDeprecationsProvider: () => undefined,
+    getPack: () => ({
+      getPath: () => path,
+    }),
+  };
+};
+
+describe('logLegacyThirdPartyPluginDeprecationWarning', () => {
+  let log: ReturnType<typeof loggerMock.create>;
+
+  beforeEach(() => {
+    log = loggerMock.create();
+  });
+
+  it('logs warning for third party plugins', () => {
+    logLegacyThirdPartyPluginDeprecationWarning({
+      specs: [createPluginSpec({ id: 'plugin', path: '/some-external-path' })],
+      log,
+    });
+    expect(log.warn).toHaveBeenCalledTimes(1);
+    expect(log.warn.mock.calls[0]).toMatchInlineSnapshot(`
+      Array [
+        "Some installed third party plugin(s) [plugin] are using the legacy plugin format and will no longer work in a future Kibana release. Please refer to https://www.elastic.co/guide/en/kibana/master/breaking-changes-8.0.html for a list of breaking changes and https://github.com/elastic/kibana/blob/master/src/core/MIGRATION.md for documentation on how to migrate legacy plugins.",
+      ]
+    `);
+  });
+
+  it('lists all the deprecated plugins and only log once', () => {
+    logLegacyThirdPartyPluginDeprecationWarning({
+      specs: [
+        createPluginSpec({ id: 'pluginA', path: '/abs/path/to/pluginA' }),
+        createPluginSpec({ id: 'pluginB', path: '/abs/path/to/pluginB' }),
+        createPluginSpec({ id: 'pluginC', path: '/abs/path/to/pluginC' }),
+      ],
+      log,
+    });
+    expect(log.warn).toHaveBeenCalledTimes(1);
+    expect(log.warn.mock.calls[0]).toMatchInlineSnapshot(`
+      Array [
+        "Some installed third party plugin(s) [pluginA, pluginB, pluginC] are using the legacy plugin format and will no longer work in a future Kibana release. Please refer to https://www.elastic.co/guide/en/kibana/master/breaking-changes-8.0.html for a list of breaking changes and https://github.com/elastic/kibana/blob/master/src/core/MIGRATION.md for documentation on how to migrate legacy plugins.",
+      ]
+    `);
+  });
+
+  it('does not log warning for internal legacy plugins', () => {
+    logLegacyThirdPartyPluginDeprecationWarning({
+      specs: [
+        createPluginSpec({
+          id: 'plugin',
+          path: '/absolute/path/to/kibana/src/legacy/core_plugins',
+        }),
+        createPluginSpec({
+          id: 'plugin',
+          path: '/absolute/path/to/kibana/x-pack',
+        }),
+      ],
+      log,
+    });
+
+    expect(log.warn).not.toHaveBeenCalled();
+  });
+});

src/core/server/legacy/plugins/log_legacy_plugins_warning.ts

@@ -0,0 +1,52 @@
+/*
+ * Licensed to Elasticsearch B.V. under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch B.V. licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+import { Logger } from '../../logging';
+import { LegacyPluginSpec } from '../types';
+
+const internalPaths = ['/src/legacy/core_plugins', '/x-pack'];
+
+const breakingChangesUrl =
+  'https://www.elastic.co/guide/en/kibana/master/breaking-changes-8.0.html';
+const migrationGuideUrl = 'https://github.com/elastic/kibana/blob/master/src/core/MIGRATION.md';
+
+export const logLegacyThirdPartyPluginDeprecationWarning = ({
+  specs,
+  log,
+}: {
+  specs: LegacyPluginSpec[];
+  log: Logger;
+}) => {
+  const thirdPartySpecs = specs.filter(isThirdPartyPluginSpec);
+  if (thirdPartySpecs.length > 0) {
+    const pluginIds = thirdPartySpecs.map(spec => spec.getId());
+    log.warn(
+      `Some installed third party plugin(s) [${pluginIds.join(
+        ', '
+      )}] are using the legacy plugin format and will no longer work in a future Kibana release. ` +
+        `Please refer to ${breakingChangesUrl} for a list of breaking changes ` +
+        `and ${migrationGuideUrl} for documentation on how to migrate legacy plugins.`
+    );
+  }
+};
+
+const isThirdPartyPluginSpec = (spec: LegacyPluginSpec): boolean => {
+  const pluginPath = spec.getPack().getPath();
+  return !internalPaths.some(internalPath => pluginPath.indexOf(internalPath) > -1);
+};

src/core/server/legacy/types.ts

@@ -98,6 +98,7 @@ export interface LegacyPluginSpec {
   getExpectedKibanaVersion: () => string;
   getConfigPrefix: () => string;
   getDeprecationsProvider: () => LegacyConfigDeprecationProvider | undefined;
+  getPack: () => LegacyPluginPack;
 }
 
 /**

src/core/server/server.api.md

@@ -2458,11 +2458,11 @@ export const validBodyOutput: readonly ["data", "stream"];
 // Warnings were encountered during analysis:
 //
 // src/core/server/http/router/response.ts:316:3 - (ae-forgotten-export) The symbol "KibanaResponse" needs to be exported by the entry point index.d.ts
-// src/core/server/legacy/types.ts:162:3 - (ae-forgotten-export) The symbol "VarsProvider" needs to be exported by the entry point index.d.ts
-// src/core/server/legacy/types.ts:163:3 - (ae-forgotten-export) The symbol "VarsReplacer" needs to be exported by the entry point index.d.ts
-// src/core/server/legacy/types.ts:164:3 - (ae-forgotten-export) The symbol "LegacyNavLinkSpec" needs to be exported by the entry point index.d.ts
-// src/core/server/legacy/types.ts:165:3 - (ae-forgotten-export) The symbol "LegacyAppSpec" needs to be exported by the entry point index.d.ts
-// src/core/server/legacy/types.ts:166:16 - (ae-forgotten-export) The symbol "LegacyPluginSpec" needs to be exported by the entry point index.d.ts
+// src/core/server/legacy/types.ts:163:3 - (ae-forgotten-export) The symbol "VarsProvider" needs to be exported by the entry point index.d.ts
+// src/core/server/legacy/types.ts:164:3 - (ae-forgotten-export) The symbol "VarsReplacer" needs to be exported by the entry point index.d.ts
+// src/core/server/legacy/types.ts:165:3 - (ae-forgotten-export) The symbol "LegacyNavLinkSpec" needs to be exported by the entry point index.d.ts
+// src/core/server/legacy/types.ts:166:3 - (ae-forgotten-export) The symbol "LegacyAppSpec" needs to be exported by the entry point index.d.ts
+// src/core/server/legacy/types.ts:167:16 - (ae-forgotten-export) The symbol "LegacyPluginSpec" needs to be exported by the entry point index.d.ts
 // src/core/server/plugins/plugins_service.ts:47:5 - (ae-forgotten-export) The symbol "InternalPluginInfo" needs to be exported by the entry point index.d.ts
 // src/core/server/plugins/types.ts:230:3 - (ae-forgotten-export) The symbol "KibanaConfigType" needs to be exported by the entry point index.d.ts
 // src/core/server/plugins/types.ts:230:3 - (ae-forgotten-export) The symbol "SharedGlobalConfigKeys" needs to be exported by the entry point index.d.ts