Files
factorio-clusterio/lib/hash.js
T
Hornwitser 13a069a798 Reimplement hashFile locally
Replace the 10 MB of dependencies that is hash-files with a homebrew
Promise based implementation of hashFile that uses crypto and fs.  This
somehow also ends up being the same amount of code as the one using
hash-files.
2019-08-07 10:18:14 +02:00

23 lines
569 B
JavaScript

const crypto = require('crypto');
const fs = require('fs');
/**
* Returns a promise that resolves to the SHA1 hash of the file given by path
*/
exports.hashFile = function(path) {
return new Promise(function(resolve, reject) {
let hasher = crypto.createHash('sha1')
hasher.setEncoding('hex')
hasher.on('finish', function() {
resolve(hasher.read());
});
let stream = fs.createReadStream(path);
stream.on('error', function(error) {
// the docs doesn't say anything about what's passed on error
reject(error);
});
stream.pipe(hasher);
});
}