Move Tail to flipper-server-core

Summary: Tail is a server-side logging utility. We cannot add it to flipper-frontend-core as it is going to be included into the browser bundle then and break the build.

Reviewed By: antonk52

Differential Revision: D36771864

fbshipit-source-id: 169cdb88543f1e47f39e8c0976c3a3f45c0439d5

desktop/flipper-frontend-core/package.json

@@ -13,12 +13,11 @@
     "eventemitter3": "^4.0.7",
     "flipper-common": "0.0.0",
     "flipper-plugin": "0.0.0",
-    "fs-extra": "^10.1.0",
     "immer": "^9.0.12",
     "js-base64": "^3.7.2",
     "p-map": "^5.3.0",
-    "semver": "^7.3.7",
-    "reconnecting-websocket": "^4.4.0"
+    "reconnecting-websocket": "^4.4.0",
+    "semver": "^7.3.7"
   },
   "devDependencies": {
     "flipper-test-utils": "0.0.0"

desktop/flipper-frontend-core/src/index.tsx

@@ -15,4 +15,3 @@ export * from './globalObject';
 export * from './plugins';
 export * from './flipperLibImplementation';
 export * from './client/FlipperServerClient';
-export * from './utils/tail';

desktop/flipper-server-core/src/index.tsx

@@ -12,6 +12,7 @@ export {loadSettings} from './utils/settings';
 export {loadLauncherSettings} from './utils/launcherSettings';
 export {loadProcessConfig} from './utils/processConfig';
 export {getEnvironmentInfo} from './utils/environmentInfo';
+export * from './utils/tail';
 
 import GKImplementation from './fb-stubs/GK';
 export {setupPrefetcher} from './fb-stubs/Prefetcher';

desktop/flipper-server-core/src/utils/tail.tsx

@@ -7,7 +7,7 @@
  * @format
  */
 
-import EventEmitter from 'eventemitter3';
+import EventEmitter from 'events';
 import fs, {FSWatcher} from 'fs-extra';
 import path from 'path';