decaffeinate: rename app/coffee dir to app/js

app/js/LockManager.js

@@ -0,0 +1,56 @@
+/* eslint-disable
+    handle-callback-err,
+    no-unused-vars,
+*/
+// TODO: This file was created by bulk-decaffeinate.
+// Fix any style issues and re-enable lint.
+/*
+ * decaffeinate suggestions:
+ * DS101: Remove unnecessary use of Array.from
+ * DS102: Remove unnecessary code created because of implicit returns
+ * DS207: Consider shorter variations of null checks
+ * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
+ */
+let LockManager;
+const Settings = require('settings-sharelatex');
+const logger = require("logger-sharelatex");
+const Lockfile = require('lockfile'); // from https://github.com/npm/lockfile
+const Errors = require("./Errors");
+const fs = require("fs");
+const Path = require("path");
+module.exports = (LockManager = {
+	LOCK_TEST_INTERVAL: 1000, // 50ms between each test of the lock
+	MAX_LOCK_WAIT_TIME: 15000, // 10s maximum time to spend trying to get the lock
+	LOCK_STALE: 5*60*1000, // 5 mins time until lock auto expires
+
+	runWithLock(path, runner, callback) {
+		if (callback == null) { callback = function(error) {}; }
+		const lockOpts = {
+			wait: this.MAX_LOCK_WAIT_TIME,
+			pollPeriod: this.LOCK_TEST_INTERVAL,
+			stale: this.LOCK_STALE
+		};
+		return Lockfile.lock(path, lockOpts, function(error) {
+			if ((error != null ? error.code : undefined) === 'EEXIST') {
+				return callback(new Errors.AlreadyCompilingError("compile in progress"));
+			} else if (error != null) {
+				return fs.lstat(path, (statLockErr, statLock)=>
+					fs.lstat(Path.dirname(path), (statDirErr, statDir)=>
+						fs.readdir(Path.dirname(path), function(readdirErr, readdirDir){
+							logger.err({error, path, statLock, statLockErr, statDir, statDirErr, readdirErr, readdirDir}, "unable to get lock");
+							return callback(error);
+						})
+					)
+				);
+			} else {
+				return runner((error1, ...args) =>
+					Lockfile.unlock(path, function(error2) {
+						error = error1 || error2;
+						if (error != null) { return callback(error); }
+						return callback(null, ...Array.from(args));
+					})
+				);
+			}
+		});
+	}
+});