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36 lines
893 B
36 lines
893 B
var fs = require('fs')
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, crypto = require('crypto')
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, path = require('path')
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, childProcess = require('child_process')
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;
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/**
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* Check if a directory exists and create it on the fly if it is not the case
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* cb is optional, signature: err
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*/
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function ensureDirectoryExists (dir, cb) {
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var callback = cb || function () {}
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;
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childProcess.exec('mkdir -p ' + dir, function (err) { return callback(err); });
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}
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/**
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* Return a random alphanumerical string of length len
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* There is a very small probability for the length to be less than len
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* (il the base64 conversion yields to many pluses and slashes) but
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* that's not an issue here
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*/
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function uid (len) {
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return crypto.randomBytes(Math.ceil(len * 5 / 4))
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.toString('base64')
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.replace(/[+\/]/g, '')
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.slice(0, len);
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}
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module.exports.ensureDirectoryExists = ensureDirectoryExists;
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module.exports.uid = uid;
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