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|
| var Promise = require('any-promise')
| var fs
| try {
| fs = require('graceful-fs')
| } catch(err) {
| fs = require('fs')
| }
|
| var api = [
| 'appendFile',
| 'chmod',
| 'chown',
| 'close',
| 'fchmod',
| 'fchown',
| 'fdatasync',
| 'fstat',
| 'fsync',
| 'ftruncate',
| 'futimes',
| 'lchown',
| 'link',
| 'lstat',
| 'mkdir',
| 'open',
| 'read',
| 'readFile',
| 'readdir',
| 'readlink',
| 'realpath',
| 'rename',
| 'rmdir',
| 'stat',
| 'symlink',
| 'truncate',
| 'unlink',
| 'utimes',
| 'write',
| 'writeFile'
| ]
|
| typeof fs.access === 'function' && api.push('access')
| typeof fs.copyFile === 'function' && api.push('copyFile')
| typeof fs.mkdtemp === 'function' && api.push('mkdtemp')
|
| require('thenify-all').withCallback(fs, exports, api)
|
| exports.exists = function (filename, callback) {
| // callback
| if (typeof callback === 'function') {
| return fs.stat(filename, function (err) {
| callback(null, !err);
| })
| }
| // or promise
| return new Promise(function (resolve) {
| fs.stat(filename, function (err) {
| resolve(!err)
| })
| })
| }
|
|
