Dev mode: fixed loading plugins located outside of the Flipper source root folder

Summary: Dev mode: fixed loading of plugins located outside of the Flipper source root folder, e.g. in ~/flipper-plugins as suggested in tutorial docs.

Reviewed By: passy

Differential Revision: D21306639

fbshipit-source-id: bb9044b25324065f0c12169b95fbe663da8d4305

desktop/static/compilePlugins.ts

@@ -16,6 +16,7 @@ import {homedir} from 'os';
 import {runBuild, PluginDetails} from 'flipper-pkg-lib';
 import getPlugins from './getPlugins';
 import startWatchPlugins from './startWatchPlugins';
+import ensurePluginFoldersWatchable from './ensurePluginFoldersWatchable';
 
 const HOME_DIR = homedir();
 
@@ -44,6 +45,7 @@ export default async function (
     );
     return [];
   }
+  await ensurePluginFoldersWatchable();
   options = Object.assign({}, DEFAULT_COMPILE_OPTIONS, options);
   const defaultPlugins = (
     await fs.readJson(path.join(__dirname, 'defaultPlugins', 'index.json'))