Intlayer

import { writeFile } from 'node:fs/promises'; // import { createHash } from 'node:crypto'; // import { createReadStream } from 'node:fs'; // import type { Readable } from 'node:stream'; // const hashFile = async (path: string) => { // const h = createHash('sha256'); // const rs = createReadStream(path); // rs.on('data', (chunk) => h.update(chunk)); // await new Promise<void>((res, rej) => { // rs.on('end', () => res()); // rs.on('error', rej); // }); // return h.digest('hex'); // }; // const isReadableStream = (value: unknown): value is Readable => // !!value && // typeof value === 'object' && // typeof (value as any).pipe === 'function'; export const writeFileIfChanged = async ( path: string, dataOrStream: string, { encoding = 'utf8' }: { encoding?: BufferEncoding } = {} ): Promise<boolean> => { // Disabled because it's too slow. Build time increases from 3s to 7s. await writeFile(path, dataOrStream, { encoding }); // 1) write new content to temporary file (stream-safe) // const tmp = `${path}.tmp`; // if (isReadableStream(dataOrStream)) { // await pipeline(dataOrStream, createWriteStream(tmp)); // } else { // // dataOrStream = string | Buffer // const buf = Buffer.isBuffer(dataOrStream) // ? dataOrStream // : Buffer.from(dataOrStream, encoding); // await writeFile(tmp, buf); // } // 2) if old file exists, compare hashes (streaming) // let same = false; // try { // const [oldHash, newHash] = await Promise.all([ // hashFile(path), // hashFile(tmp), // ]); // same = oldHash === newHash; // } catch { // // old file missing -> will replace // } // if (same) { // await rm(tmp); // return false; // no change // } // 3) atomic replacement // On Unix, rename is atomic. On Windows, if file exists, we can delete it first. // try { // await rename(tmp, path); // } catch { // try { // await rm(path); // } catch {} // await rename(tmp, path); // } return true; // changed };