50 lines
1.7 KiB
JavaScript
50 lines
1.7 KiB
JavaScript
const fs = require("fs");
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const path = require("path");
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const sriToolbox = require("sri-toolbox");
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const version = process.argv[2];
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function read(file, encoding) {
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return new Promise((resolve, reject) =>
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fs.readFile(file, encoding, (err, body) =>
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err ? reject(err) : resolve(body)));
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}
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function write(file, data) {
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return new Promise((resolve, reject) =>
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fs.writeFile(file, data, (err) =>
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err ? reject(err) : resolve()));
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}
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Promise.all(process.argv.slice(3).map(file =>
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read(file, "utf8")
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.then(body => {
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// 1 - url prefix: "http…/KaTeX/
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// 2 - opening quote: "
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// 3 - preserved suffix: /katex.min.js" integrity="…"
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// 4 - file name: katex.min.js
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// 5 - integrity opening quote: "
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// 6 - old hash: sha384-…
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// 7 - integrity hash algorithm: sha384
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const re = /((["'])https?:\/\/cdnjs.cloudflare.com\/ajax\/libs\/KaTeX\/)[^\/"']+(\/([^"']+)\2(?:\s+integrity=(["'])(([^-]+)-[^"']+)\5)?)/g;
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const hashes = {};
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body = body.replace(re, (m, pre, oq1, post, file, oq2, old, algo) => {
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if (old) {
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hashes[old] = { file, algo };
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}
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return pre + version + post;
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});
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return Promise.all(Object.keys(hashes).map(hash =>
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read(path.join("dist", hashes[hash].file), null)
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.then(data => {
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body = body.replace(hash, sriToolbox.generate({
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algorithms: [hashes[hash].algo],
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}, data));
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})
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)).then(() => write(file, body));
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})
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)).then(() => process.exit(0), err => {
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console.error(err.stack);
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process.exit(1);
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});
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