#!/usr/bin/env node
// Compile .design-sync/tailwind-entry.css → .design-sync/compiled.css.
//
// The repo only depends on @tailwindcss/postcss (Next drives it through
// postcss.config.mjs), not @tailwindcss/cli — so this runs the same plugin
// directly rather than adding a devDependency just for the sync.
//
// Re-run before every package-build.mjs: Tailwind generates utilities by
// scanning sources, and newly authored .design-sync/previews/*.tsx introduce
// classes that aren't in the previous compile.
//
//   node .design-sync/build-css.mjs

import { readFileSync, writeFileSync } from 'node:fs';
import { dirname, resolve } from 'node:path';
import { fileURLToPath } from 'node:url';
import postcss from 'postcss';
import tailwind from '@tailwindcss/postcss';

const HERE = dirname(fileURLToPath(import.meta.url));
const from = resolve(HERE, 'tailwind-entry.css');
const to = resolve(HERE, 'compiled.css');

const result = await postcss([tailwind()]).process(readFileSync(from, 'utf8'), { from, to });
for (const w of result.warnings()) console.error(`! ${w.toString()}`);
writeFileSync(to, result.css);
console.error(`css: ${(result.css.length / 1024).toFixed(0)} KB → ${to}`);