Settings = require('settings-sharelatex') logger = require "logger-sharelatex" Lockfile = require('lockfile') # from https://github.com/npm/lockfile Errors = require "./Errors" fs = require("fs") 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 = ((releaseLock = (error) ->) ->), callback = ((error) ->)) -> lockOpts = wait: @MAX_LOCK_WAIT_TIME pollPeriod: @LOCK_TEST_INTERVAL stale: @LOCK_STALE Lockfile.lock path, lockOpts, (error) -> if error?.code is 'EEXIST' return callback new Errors.AlreadyCompilingError("compile in progress") else if error? fs.lstat path, (statLockErr, statLock)-> fs.lstat Path.dirname(path), (statDirErr, statDir)-> fs.readdir Path.dirname(path), (readdirErr, readdirDir)-> logger.err error:error, path:path, statLock:statLock, statLockErr:statLockErr, statDir:statDir, statDirErr: statDirErr, readdirErr:readdirErr, readdirDir:readdirDir, "unable to get lock" return callback(error) else runner (error1, args...) -> Lockfile.unlock path, (error2) -> error = error1 or error2 return callback(error) if error? callback(null, args...)