tra-analysis/website/node_modules/npm/lib/install/exists.js
2019-01-06 13:14:45 -06:00

28 lines
775 B
JavaScript

'use strict'
var fs = require('fs')
var inflight = require('inflight')
var accessError = require('./access-error.js')
var isFsAccessAvailable = require('./is-fs-access-available.js')
if (isFsAccessAvailable) {
module.exports = fsAccessImplementation
} else {
module.exports = fsStatImplementation
}
// exposed only for testing purposes
module.exports.fsAccessImplementation = fsAccessImplementation
module.exports.fsStatImplementation = fsStatImplementation
function fsAccessImplementation (dir, done) {
done = inflight('exists:' + dir, done)
if (!done) return
fs.access(dir, fs.F_OK, done)
}
function fsStatImplementation (dir, done) {
done = inflight('exists:' + dir, done)
if (!done) return
fs.stat(dir, function (er) { done(accessError(dir, er)) })
}