339b786fb5
Summary: No functional changes, just refactoring for easier implementation of plugin updates installation Reviewed By: passy Differential Revision: D21902525 fbshipit-source-id: fbfa221a89b879b0d08127676b27df65ef63307d
73 lines
2.3 KiB
TypeScript
73 lines
2.3 KiB
TypeScript
/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @format
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*/
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import path from 'path';
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import Watchman from './watchman';
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import {PluginDetails} from 'flipper-plugin-lib';
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export default async function startWatchPlugins(
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plugins: PluginDetails[],
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compilePlugin: (plugin: PluginDetails) => void | Promise<void>,
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) {
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// eslint-disable-next-line no-console
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console.log('🕵️ Watching for plugin changes');
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const delayedCompilation: {[key: string]: NodeJS.Timeout | null} = {};
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const kCompilationDelayMillis = 1000;
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const onPluginChanged = (plugin: PluginDetails) => {
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if (!delayedCompilation[plugin.name]) {
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delayedCompilation[plugin.name] = setTimeout(() => {
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delayedCompilation[plugin.name] = null;
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// eslint-disable-next-line no-console
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console.log(`🕵️ Detected changes in ${plugin.name}`);
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compilePlugin(plugin);
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}, kCompilationDelayMillis);
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}
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};
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try {
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await startWatchingPluginsUsingWatchman(plugins, onPluginChanged);
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} catch (err) {
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console.error(
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'Failed to start watching plugin files using Watchman, continue without hot reloading',
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err,
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);
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}
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}
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async function startWatchingPluginsUsingWatchman(
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plugins: PluginDetails[],
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onPluginChanged: (plugin: PluginDetails) => void,
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) {
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// Initializing a watchman for each folder containing plugins
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const watchmanRootMap: {[key: string]: Watchman} = {};
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await Promise.all(
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plugins.map(async (plugin) => {
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const watchmanRoot = path.resolve(plugin.dir, '..');
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if (!watchmanRootMap[watchmanRoot]) {
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watchmanRootMap[watchmanRoot] = new Watchman(watchmanRoot);
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await watchmanRootMap[watchmanRoot].initialize();
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}
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}),
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);
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// Start watching plugins using the initialized watchmans
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await Promise.all(
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plugins.map(async (plugin) => {
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const watchmanRoot = path.resolve(plugin.dir, '..');
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const watchman = watchmanRootMap[watchmanRoot];
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await watchman.startWatchFiles(
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path.relative(watchmanRoot, plugin.dir),
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() => onPluginChanged(plugin),
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{
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excludes: ['**/__tests__/**/*', '**/node_modules/**/*', '**/.*'],
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},
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);
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}),
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);
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}
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