flipper-server refactor

Summary:
This changes moves most of the functionality found in flipper-server to flipper-server-core.

flipper-server will mostly be a package that wraps around flipper-server-core. Staying in flipper-server:
- Command line args
- Orchestration to start the necessary servers

Reviewed By: aigoncharov

Differential Revision: D36807087

fbshipit-source-id: f29002c7cc5d08b8c5184fdaaa02ba22562a9f45

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

@@ -0,0 +1,75 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ */
+
+import os from 'os';
+import {parseEnvironmentVariables, getLogger} from 'flipper-common';
+import path from 'path';
+import fs from 'fs-extra';
+import {KeytarModule} from '../utils/keytar';
+import {FlipperServerImpl} from '../FlipperServerImpl';
+import {getEnvironmentInfo} from '../utils/environmentInfo';
+import {getGatekeepers} from '../gk';
+import {loadLauncherSettings} from '../utils/launcherSettings';
+import {loadProcessConfig} from '../utils/processConfig';
+import {loadSettings} from '../utils/settings';
+
+/**
+ * Creates an instance of FlipperServer (FlipperServerImpl). This is the
+ * server used by clients to connect to.
+ * @param rootDir Application path.
+ * @param staticPath Static assets path.
+ * @param settingsString Optional settings used to override defaults.
+ * @param enableLauncherSettings Optional launcher settings used to override defaults.
+ * @returns
+ */
+export async function startFlipperServer(
+  rootDir: string,
+  staticPath: string,
+  settingsString: string,
+  enableLauncherSettings: boolean,
+  keytarModule: KeytarModule,
+): Promise<FlipperServerImpl> {
+  const execPath = process.execPath;
+  const appPath = rootDir;
+  const isProduction =
+    process.env.NODE_ENV !== 'development' && process.env.NODE_ENV !== 'test';
+  const env = process.env;
+  let desktopPath = path.resolve(os.homedir(), 'Desktop');
+
+  // eslint-disable-next-line node/no-sync
+  if (!fs.existsSync(desktopPath)) {
+    console.warn('Failed to find desktop path, falling back to homedir');
+    desktopPath = os.homedir();
+  }
+
+  const environmentInfo = await getEnvironmentInfo(appPath, isProduction, true);
+
+  return new FlipperServerImpl(
+    {
+      environmentInfo,
+      env: parseEnvironmentVariables(process.env),
+      // TODO: make username parameterizable
+      gatekeepers: getGatekeepers(environmentInfo.os.unixname),
+      paths: {
+        appPath,
+        homePath: os.homedir(),
+        execPath,
+        staticPath: staticPath,
+        tempPath: os.tmpdir(),
+        desktopPath: desktopPath,
+      },
+      launcherSettings: await loadLauncherSettings(enableLauncherSettings),
+      processConfig: loadProcessConfig(env),
+      settings: await loadSettings(settingsString),
+      validWebSocketOrigins: ['localhost:', 'http://localhost:'],
+    },
+    getLogger(),
+    keytarModule,
+  );
+}