0675dd924d
Reviewed By: passy Differential Revision: D17863711 fbshipit-source-id: 259dc77826fb803ff1b88c88529d7f679d3b74d8
93 lines
2.5 KiB
JavaScript
93 lines
2.5 KiB
JavaScript
/**
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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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const os = require('os');
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const fs = require('fs');
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const path = require('path');
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const promisify = require('util').promisify;
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const {spawn} = require('child_process');
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const xdg = require('xdg-basedir');
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const mkdirp = require('mkdirp');
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const isProduction = () =>
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!/node_modules[\\/]electron[\\/]/.test(process.execPath);
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const isLauncherInstalled = () => {
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if (os.type() == 'Darwin') {
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const receipt = 'com.facebook.flipper.launcher';
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const plistLocation = '/Applications/Flipper.app/Contents/Info.plist';
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return (
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fs.existsSync(plistLocation) &&
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fs.readFileSync(plistLocation).indexOf(receipt) > 0
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);
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}
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return false;
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};
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const startLauncher = argv => {
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const args = [];
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if (argv.file) {
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args.push('--file', argv.file);
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}
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if (argv.url) {
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args.push('--url', argv.url);
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}
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if (os.type() == 'Darwin') {
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spawn('open', ['/Applications/Flipper.app', '--args'].concat(args));
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}
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};
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const checkIsCycle = async () => {
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const dir = path.join(xdg.cache, 'flipper');
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const filePath = path.join(dir, 'last-launcher-run');
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// This isn't monotonically increasing, so there's a change we get time drift
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// between the checks, but the worst case here is that we do two roundtrips
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// before this check works.
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const rightNow = Date.now();
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let backThen;
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try {
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backThen = parseInt(await promisify(fs.readFile)(filePath), 10);
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} catch (e) {
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backThen = 0;
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}
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const delta = rightNow - backThen;
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await promisify(mkdirp)(dir);
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await promisify(fs.writeFile)(filePath, rightNow);
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// If the last startup was less than 5s ago, something's not okay.
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return Math.abs(delta) < 5000;
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};
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/**
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* Runs the launcher if required and returns a boolean based on whether
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* it has. You should shut down this instance of the app in that case.
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*/
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module.exports = async function delegateToLauncher(argv) {
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if (argv.launcher && isProduction() && isLauncherInstalled()) {
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if (await checkIsCycle()) {
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console.error(
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'Launcher cycle detected. Not delegating even though I usually would.',
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);
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return false;
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}
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console.warn('Delegating to Flipper Launcher ...');
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console.warn(
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`You can disable this behavior by passing '--no-launcher' at startup.`,
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);
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startLauncher(argv);
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return true;
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}
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return false;
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};
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