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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 | 2x 8x 8x 8x 8x 4x 4x 4x 4x 8x 8x 8x 8x 5x 4x 3x 3x 7x 7x 6x 6x 7x 7x 7x 7x 7x 5x 4x 4x 2x 7x 2x 2x 7x 12x 7x 7x 12x 10x 8x 8x 6x 6x 8x 8x 6x 8x 7x 11x 12x 11x 6x 6x 10x 9x 7x 3x 10x 10x 8x 7x 9x 9x 6x 5x 3x 3x | /* @flow */ import * as locker from 'lockfile'; import * as fs from 'fs'; import path from 'path'; import type {Callback} from '@verdaccio/types'; import type {LockOptions} from '@verdaccio/file-locking'; // locks a file by creating a lock file const lockFile = function(name: string, callback: Callback) { const statDir = (name) => { return new Promise((resolve, reject) => { // test to see if the directory exists const dirPath = path.dirname(name); fs.stat(dirPath, function(err, stats) { Iif (err) { return reject(err); } else Iif (!stats.isDirectory()) { return resolve(new Error(`${path.dirname(name)} is not a directory`)); } else { return resolve(null); } }); }); }; const statfile = (name) => { return new Promise((resolve, reject) => { // test to see if the directory exists fs.stat(name, function(err, stats) { if (err) { return reject(err); } else Iif (!stats.isFile()) { return resolve(new Error(`${path.dirname(name)} is not a file`)); } else { return resolve(null); } }); }); }; const lockfile = (name) => { return new Promise((resolve) => { const lockOpts = { // time (ms) to wait when checking for stale locks wait: 1000, // how often (ms) to re-check stale locks pollPeriod: 100, // locks are considered stale after 5 minutes stale: 5 * 60 * 1000, // number of times to attempt to create a lock retries: 100, // time (ms) between tries retryWait: 100, }; const lockFileName = `${name}.lock`; locker.lock(lockFileName, lockOpts, () => { resolve(); }); }); }; Promise.resolve().then(() => { return statDir(name); }).then(() => { return statfile(name); }).then(() => { return lockfile(name); }).then(() => { callback(null); }).catch((err) => { callback(err); }); }; // unlocks file by removing existing lock file const unlockFile= function(name: string, next: Callback) { const lockFileName = `${name}.lock`; locker.unlock(lockFileName, function() { return next(null); }); }; /** * Reads a local file, which involves * optionally taking a lock * reading the file contents * optionally parsing JSON contents * @param {*} name * @param {*} options * @param {*} callback */ function readFile(name: string, options: LockOptions = {}, callback: any = () => {}) { if (typeof options === 'function') { callback = options; options = {}; } options.lock = options.lock || false; options.parse = options.parse || false; const lock = function(options) { return new Promise((resolve, reject) => { if (!options.lock) { return resolve(null); } lockFile(name, function(err) { Iif (err) { return reject(err); } return resolve(null); }); }); }; const read = function() { return new Promise((resolve, reject) => { fs.readFile(name, 'utf8', function(err, contents) { if (err) { return reject(err); } resolve(contents); }); }); }; const parseJSON = function(contents) { return new Promise((resolve, reject) => { if (!options.parse) { return resolve(contents); } try { contents = JSON.parse(contents); return resolve(contents); } catch (err) { return reject(err); } }); }; Promise.resolve().then(()=> { return lock(options); }).then(() => { return read(); }).then((content) => { return parseJSON(content); }).then((result) => { callback(null, result); }, (err) => { callback(err); }); } export {lockFile, unlockFile, readFile}; |