Initialize flipper lib and render host in headless mode

Reviewed By: mweststrate

Differential Revision: D36130158

fbshipit-source-id: cfdd22456bd4674e027dbcf83e67bf52cd757cf7

desktop/flipper-server-companion/src/initializeFlipperLibImplementation.tsx

@@ -0,0 +1,30 @@
+/**
+ * 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 {Logger, _setFlipperLibImplementation} from 'flipper-plugin';
+import {baseFlipperLibImplementation, RenderHost} from 'flipper-frontend-core';
+
+export function initializeFlipperLibImplementation(
+  renderHost: RenderHost,
+  logger: Logger,
+) {
+  _setFlipperLibImplementation({
+    ...baseFlipperLibImplementation(renderHost, logger),
+    enableMenuEntries() {},
+    createPaste() {
+      // TODO: Implement me
+      throw new Error('Not implemented');
+    },
+    selectPlugin() {},
+    showNotification() {
+      // TODO: Write to stdout/stderr?
+      throw new Error('Not supported in headless context');
+    },
+  });
+}

desktop/flipper-server-companion/src/initializeRenderHost.tsx

@@ -0,0 +1,90 @@
+/**
+ * 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 {FlipperServer, FlipperServerConfig, isProduction} from 'flipper-common';
+import type {RenderHost} from 'flipper-frontend-core';
+
+export function initializeRenderHost(
+  flipperServer: FlipperServer,
+  flipperServerConfig: FlipperServerConfig,
+) {
+  FlipperRenderHostInstance = {
+    readTextFromClipboard() {
+      // TODO:
+      return undefined;
+    },
+    writeTextToClipboard(_text: string) {
+      // TODO:
+    },
+    async importFile() {
+      throw new Error('Not implemented');
+    },
+    async exportFile() {
+      throw new Error('Not implemented');
+    },
+    openLink(url: string) {
+      throw new Error('Not implemented');
+    },
+    hasFocus() {
+      return true;
+    },
+    onIpcEvent(_event) {
+      // no-op
+    },
+    sendIpcEvent(_event, ..._args: any[]) {
+      // no-op
+    },
+    shouldUseDarkColors() {
+      return false;
+    },
+    restartFlipper() {
+      // TODO:
+    },
+    loadDefaultPlugins: getDefaultPluginsIndex,
+    serverConfig: flipperServerConfig,
+    GK(gatekeeper) {
+      return flipperServerConfig.gatekeepers[gatekeeper] ?? false;
+    },
+    flipperServer,
+    async requirePlugin(path) {
+      let source = await flipperServer.exec('plugin-source', path);
+      // append source url (to make sure a file entry shows up in the debugger)
+      source += `\n//# sourceURL=file://${path}`;
+      // and source map url (to get source code if available)
+      source += `\n//# sourceMappingURL=file://${path.replace(/.js$/, '.map')}`;
+
+      // Plugins are compiled as typical CJS modules, referring to the global
+      // 'module', which we'll make available by loading the source into a closure that captures 'module'.
+      // Note that we use 'eval', and not 'new Function', because the latter will cause the source maps
+      // to be off by two lines (as the function declaration uses two lines in the generated source)
+      // eslint-disable-next-line no-eval
+      const cjsLoader = eval('(module) => {' + source + '\n}');
+      const theModule = {exports: {}};
+      cjsLoader(theModule);
+      return theModule.exports;
+    },
+    getStaticResourceUrl(path): string {
+      // the 'static' folder is mounted as static middleware in Express at the root
+      return '/' + path;
+    },
+    getLocalIconUrl(icon, url) {
+      if (isProduction()) {
+        return `icons/${icon.name}-${icon.variant}-${icon.size}@${icon.density}x.png`;
+      }
+      return url;
+    },
+  } as RenderHost;
+}
+
+function getDefaultPluginsIndex() {
+  // @ts-ignore
+  // eslint-disable-next-line import/no-unresolved
+  const index = require('./defaultPlugins');
+  return index.default || index;
+}