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