Move settings, launcherSettings, GKs to app / flipper-server-core

Summary:
This diff moves a lot of stuff from the client to the server. This diff is fairly large, as a lot of concept closely relate, although some things have split off to the earlier diffs in the stack, or are still to follow (like making intern requests).

This diff primarily moves reading and storing settings and GKs from client to server (both flipper and launcher settings). This means that settings are no longer persisted by Redux (which only exists on client). Most other changes are fallout from that. For now settings are just one big object, although we might need to separate settings that are only make sense in an Electron context. For example launcher settings.

Reviewed By: passy, aigoncharov

Differential Revision: D32498649

fbshipit-source-id: d842faf7a7f03774b621c7656e53a9127afc6192

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

@@ -0,0 +1,91 @@
+/**
+ * Copyright (c) Facebook, Inc. and its 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 path from 'path';
+import os from 'os';
+import xdg from 'xdg-basedir';
+import fs from 'fs-extra';
+import TOML, {JsonMap} from '@iarna/toml';
+import {LauncherSettings, ReleaseChannel} from 'flipper-common';
+
+export function xdgConfigDir() {
+  return os.platform() === 'darwin'
+    ? path.join(os.homedir(), 'Library', 'Preferences')
+    : xdg.config || path.join(os.homedir(), '.config');
+}
+
+export function launcherConfigDir() {
+  return path.join(
+    xdgConfigDir(),
+    os.platform() == 'darwin' ? 'rs.flipper-launcher' : 'flipper-launcher',
+  );
+}
+
+function getLauncherSettingsFile(): string {
+  // There is some disagreement among the XDG Base Directory implementations
+  // whether to use ~/Library/Preferences or ~/.config on MacOS. The Launcher
+  // expects the former, whereas `xdg-basedir` implements the latter.
+  return path.resolve(launcherConfigDir(), 'flipper-launcher.toml');
+}
+
+const defaultLauncherSettings: LauncherSettings = {
+  releaseChannel: ReleaseChannel.DEFAULT,
+  ignoreLocalPin: false,
+};
+
+interface FormattedSettings {
+  ignore_local_pin?: boolean;
+  release_channel?: ReleaseChannel;
+}
+
+function serialize(value: LauncherSettings): string {
+  const {ignoreLocalPin, releaseChannel, ...rest} = value;
+  const formattedSettings: FormattedSettings = {
+    ...rest,
+    ignore_local_pin: ignoreLocalPin,
+    release_channel: releaseChannel,
+  };
+  return TOML.stringify(formattedSettings as JsonMap);
+}
+
+function deserialize(content: string): LauncherSettings {
+  const {ignore_local_pin, release_channel, ...rest} = TOML.parse(
+    content,
+  ) as FormattedSettings;
+  return {
+    ...rest,
+    ignoreLocalPin: !!ignore_local_pin,
+    releaseChannel: release_channel ?? ReleaseChannel.DEFAULT,
+  };
+}
+
+export async function loadLauncherSettings(): Promise<LauncherSettings> {
+  const fileName = getLauncherSettingsFile();
+  try {
+    const content = (await fs.readFile(fileName)).toString();
+    return deserialize(content);
+  } catch (e) {
+    console.warn(
+      `Failed to read settings file: "${fileName}". ${e}. Replacing file with default settings.`,
+    );
+    await saveLauncherSettings(defaultLauncherSettings);
+    return defaultLauncherSettings;
+  }
+}
+
+export async function saveLauncherSettings(settings: LauncherSettings) {
+  const fileName = getLauncherSettingsFile();
+  const dir = path.dirname(fileName);
+  const exists = await fs.pathExists(dir);
+  if (!exists) {
+    await fs.mkdir(dir, {recursive: true});
+  }
+  const content = serialize(settings);
+  return fs.writeFile(fileName, content);
+}