overleaf/services/project-history/app/js/HashManager.js
Alf Eaton ee85d948e2 Avoid duplicating a math-closing dollar sign (#11227)
GitOrigin-RevId: ef2ef77e26df59d1af3df6dc664e284d3c70102d
2023-01-16 08:41:42 +00:00

63 lines
1.7 KiB
JavaScript

/* eslint-disable
no-undef,
no-unused-vars,
*/
// TODO: This file was created by bulk-decaffeinate.
// Fix any style issues and re-enable lint.
/*
* decaffeinate suggestions:
* DS102: Remove unnecessary code created because of implicit returns
* DS207: Consider shorter variations of null checks
* Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
*/
import fs from 'fs'
import crypto from 'crypto'
import _ from 'lodash'
import logger from '@overleaf/logger'
import OError from '@overleaf/o-error'
export function _getBlobHashFromString(string) {
const byteLength = Buffer.byteLength(string)
const hash = crypto.createHash('sha1')
hash.setEncoding('hex')
hash.update('blob ' + byteLength + '\x00')
hash.update(string, 'utf8')
hash.end()
return hash.read()
}
export function _getBlobHash(fsPath, _callback) {
if (_callback == null) {
_callback = function () {}
}
const callback = _.once(_callback)
return fs.stat(fsPath, function (err, stats) {
if (err != null) {
OError.tag(err, 'failed to stat file in _getBlobHash', { fsPath })
return callback(err)
}
const byteLength = stats.size
const hash = crypto.createHash('sha1')
hash.setEncoding('hex')
hash.update('blob ' + byteLength + '\x00')
const stream = fs.createReadStream(fsPath)
stream.on('error', function (err) {
return callback(
OError.tag(err, 'error streaming file from disk', {
fsPath,
byteLength,
})
)
})
stream.on('end', function () {
hash.end()
return callback(null, hash.read(), byteLength)
})
return stream.pipe(hash)
})
}