34 lines
922 B
JavaScript
34 lines
922 B
JavaScript
/*
|
|
MIT License http://www.opensource.org/licenses/mit-license.php
|
|
Author Alexander Akait @alexander-akait
|
|
*/
|
|
|
|
"use strict";
|
|
|
|
const createHash = require("./createHash");
|
|
|
|
/**
|
|
* @param {string | Buffer} content content
|
|
* @param {string} file file
|
|
* @returns {string} generated debug id
|
|
*/
|
|
module.exports = (content, file) => {
|
|
// We need a uuid which is 128 bits so we need 2x 64 bit hashes.
|
|
// The first 64 bits is a hash of the source.
|
|
const sourceHash = createHash("xxhash64").update(content).digest("hex");
|
|
// The next 64 bits is a hash of the filename and sourceHash
|
|
const hash128 = `${sourceHash}${createHash("xxhash64")
|
|
.update(file)
|
|
.update(sourceHash)
|
|
.digest("hex")}`;
|
|
|
|
return [
|
|
hash128.slice(0, 8),
|
|
hash128.slice(8, 12),
|
|
`4${hash128.slice(12, 15)}`,
|
|
((Number.parseInt(hash128.slice(15, 16), 16) & 3) | 8).toString(16) +
|
|
hash128.slice(17, 20),
|
|
hash128.slice(20, 32)
|
|
].join("-");
|
|
};
|