Файловый менеджер - Редактировать - /usr/lib/node_modules/npm/lib/utils/locker.js
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var crypto = require('crypto') var resolve = require('path').resolve var lockfile = require('lockfile') var log = require('npmlog') var npm = require('../npm.js') var correctMkdir = require('../utils/correct-mkdir.js') var installLocks = {} function lockFileName (base, name) { var c = name.replace(/[^a-zA-Z0-9]+/g, '-').replace(/^-+|-+$/g, '') var p = resolve(base, name) var h = crypto.createHash('sha1').update(p).digest('hex') var l = resolve(npm.cache, '_locks') return resolve(l, c.substr(0, 24) + '-' + h.substr(0, 16) + '.lock') } function lock (base, name, cb) { var lockDir = resolve(npm.cache, '_locks') correctMkdir(lockDir, function (er) { if (er) return cb(er) var opts = { stale: npm.config.get('cache-lock-stale'), retries: npm.config.get('cache-lock-retries'), wait: npm.config.get('cache-lock-wait') } var lf = lockFileName(base, name) lockfile.lock(lf, opts, function (er) { if (er) log.warn('locking', lf, 'failed', er) if (!er) { log.verbose('lock', 'using', lf, 'for', resolve(base, name)) installLocks[lf] = true } cb(er) }) }) } function unlock (base, name, cb) { var lf = lockFileName(base, name) var locked = installLocks[lf] if (locked === false) { return process.nextTick(cb) } else if (locked === true) { lockfile.unlock(lf, function (er) { if (er) { log.warn('unlocking', lf, 'failed', er) } else { installLocks[lf] = false log.verbose('unlock', 'done using', lf, 'for', resolve(base, name)) } cb(er) }) } else { var notLocked = new Error( 'Attempt to unlock ' + resolve(base, name) + ", which hasn't been locked" ) notLocked.code = 'ENOTLOCKED' throw notLocked } } module.exports = { lock: lock, unlock: unlock }
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