Intlayer

import { readFileSync } from 'node:fs'; import { copyFile, mkdir } from 'node:fs/promises'; import { dirname, join } from 'node:path'; import { fileURLToPath } from 'node:url'; import fg from 'fast-glob'; const DEFAULT_PATTERNS = 'src/**/*.{md,mdx,txt,json}'; const DEFAULT_SRC_BASE_DIR = 'src'; const DEFAULT_ASSETS_DIRNAME_IN_DIST = 'assets'; const DEFAULT_COPY_IN = 'all'; const VIRTUAL_ID = 'utils:asset'; const RESOLVED_ID = '\0utils:asset'; /** * A tsdown/rolldown-compatible plugin that: * - exposes a virtual module "utils:asset" * - copies asset files into dist/assets * @param {Object} opts - Plugin options * @param {string | string[]} [opts.patterns] - Glob(s) to copy from your source tree. * @param {string} [opts.srcBaseDir='src'] - Source root to strip when placing in dist/assets. For most repos this is 'src'. * @param {string} [opts.assetsDirnameInDist='assets'] - Where to put copied files inside dist. * @param {'esm'|'cjs'|'all'} [opts.copyIn='all'] - If you build multiple formats, you can choose to copy only on one of them to avoid redundant work. */ export const AssetPlugin = (opts = {}) => { const patterns = Array.isArray(opts.patterns) ? opts.patterns : [opts.patterns ?? DEFAULT_PATTERNS]; const srcBaseDir = opts.srcBaseDir ?? DEFAULT_SRC_BASE_DIR; const assetsDirnameInDist = opts.assetsDirnameInDist ?? DEFAULT_ASSETS_DIRNAME_IN_DIST; const copyIn = opts.copyIn ?? DEFAULT_COPY_IN; const dir = dirname(fileURLToPath(import.meta.url)); // plugins/assetPlugin.mjs (only the virtualSource content changed) const virtualSource = readFileSync( join(dir, 'asset-plugin-virtual-source.mjs'), 'utf-8' ); return { name: 'asset-plugin', // Make sure the virtual id is resolved resolveId(id) { if (id === VIRTUAL_ID) return RESOLVED_ID; return null; }, // Provide the virtual module source load(id) { if (id === RESOLVED_ID) return virtualSource; return null; }, async writeBundle(outputOptions) { // Determine whether we should copy for this output // tsdown passes Rollup-style outputOptions; we infer format from it. const fmt = (outputOptions?.format ?? '').toLowerCase(); if (copyIn !== 'all' && fmt && copyIn !== fmt) return; const outDir = outputOptions?.dir; if (!outDir) return; const distAssetsRoot = join(outDir, '..', assetsDirnameInDist); const cwd = process.cwd(); const entries = await fg(patterns, { cwd, dot: false }); await Promise.all( entries.map(async (rel) => { // keep path relative to srcBaseDir const normalized = rel.replaceAll('\\', '/'); const stripped = normalized.startsWith(`${srcBaseDir}/`) ? normalized.slice(srcBaseDir.length + 1) : normalized; const fromAbs = join(cwd, rel); const toAbs = join(distAssetsRoot, stripped); await mkdir(dirname(toAbs), { recursive: true }); await copyFile(fromAbs, toAbs); }) ); }, }; };