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1ee97e1657
After https://github.com/elastic/kibana/pull/146212 it feels like the babel-register cache is getting invalidated more frequently for some reason. The current version of the cache only stores a single cache entry for each file path, which shouldn't be too big of a problem but with these changes several versions of a file will be cached. The performance seems about equal, but because the cache contains multiple versions of a single file we should spend less time transpiling files when switching branches often. --------- Co-authored-by: kibanamachine <42973632+kibanamachine@users.noreply.github.com>
77 lines
2.5 KiB
JavaScript
77 lines
2.5 KiB
JavaScript
/*
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* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
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* or more contributor license agreements. Licensed under the Elastic License
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* 2.0 and the Server Side Public License, v 1; you may not use this file except
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* in compliance with, at your election, the Elastic License 2.0 or the Server
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* Side Public License, v 1.
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*/
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const Fs = require('fs');
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const Path = require('path');
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const Crypto = require('crypto');
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const babel = require('@babel/core');
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const peggy = require('@kbn/peggy');
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const { REPO_ROOT, UPSTREAM_BRANCH } = require('@kbn/repo-info');
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const { getBabelOptions } = require('@kbn/babel-transform');
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/**
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* @babel/register uses a JSON encoded copy of the config + babel.version
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* as the cache key for files, so we do something similar but we don't need
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* a unique cache key for every file as our config isn't different for
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* different files (by design). Instead we determine a unique prefix and
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* automatically prepend all paths with the prefix to create cache keys
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*/
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function determineCachePrefix() {
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const json = JSON.stringify({
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babelVersion: babel.version,
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peggyVersion: peggy.version,
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// get a config for a fake js, ts, and tsx file to make sure we
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// capture conditional config portions based on the file extension
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js: babel.loadOptions(getBabelOptions(Path.resolve('foo.js'))),
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ts: babel.loadOptions(getBabelOptions(Path.resolve('foo.ts'))),
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tsx: babel.loadOptions(getBabelOptions(Path.resolve('foo.tsx'))),
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});
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return Crypto.createHash('sha256').update(json).digest('hex').slice(0, 10);
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}
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function lmdbAvailable() {
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try {
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require('lmdb');
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return true;
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} catch (error) {
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return false;
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}
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}
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/**
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* @returns {import('./types').Cache}
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*/
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function getCache() {
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const log = process.env.DEBUG_BABEL_REGISTER_CACHE
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? Fs.createWriteStream('babel_register_cache.log', { flags: 'a' })
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: undefined;
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if (process.env.DISABLE_BABEL_REGISTER_CACHE) {
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log?.end('lmdb cache is disabled\n');
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return new (require('./no_cache_cache').NoCacheCache)();
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}
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if (lmdbAvailable()) {
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log?.write('lmdb is available, using lmdb cache\n');
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return new (require('./lmdb_cache').LmdbCache)({
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dir: Path.resolve(REPO_ROOT, 'data/babel_register_cache', UPSTREAM_BRANCH),
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prefix: determineCachePrefix(),
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log,
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});
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}
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log?.end('lmdb is unavailable, disabling cache\n');
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console.error('unable to load LMDB in this env, disabling babel/register cache');
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return new (require('./no_cache_cache').NoCacheCache)();
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}
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module.exports = {
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getCache,
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};
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