build-package.mjs

import { cp, mkdir, mkdtemp, readdir, readFile, rm, writeFile } from 'node:fs/promises';
import { spawnSync } from 'node:child_process';
import { createRequire } from 'node:module';
import { tmpdir } from 'node:os';
import path from 'node:path';

const root = process.cwd();
const pkg = JSON.parse(await readFile(path.join(root, 'package.json'), 'utf8'));
if (pkg.name === '@allmaps/slides') {
  const { bundleSlides } = await import('./bundle-slides.mjs');
  await bundleSlides(root);
} else {
  const require = createRequire(path.join(root, 'package.json'));
  const ts = require('typescript');
  const dist = path.join(root, 'dist');
  await rm(dist, { recursive: true, force: true });
  await mkdir(dist, { recursive: true });
  async function compile(directory) {
    for (const entry of await readdir(directory, { withFileTypes: true })) {
      const filename = path.join(directory, entry.name);
      if (entry.isDirectory()) { await compile(filename); continue; }
      if (!/\.(ts|js)$/.test(filename) || filename.endsWith('.d.ts')) continue;
      const relative = path.relative(path.join(root, 'src'), filename).replace(/\.ts$/, '.js');
      const destination = path.join(dist, relative);
      const { outputText } = ts.transpileModule(await readFile(filename, 'utf8'), {
        fileName: filename,
        compilerOptions: { target: ts.ScriptTarget.ES2023, module: ts.ModuleKind.ESNext, rewriteRelativeImportExtensions: true, verbatimModuleSyntax: true },
      });
      await mkdir(path.dirname(destination), { recursive: true });
      await writeFile(destination, outputText);
    }
  }
  await compile(path.join(root, 'src'));
  const declarations = await mkdtemp(path.join(tmpdir(), 'slides-declarations-'));
  try {
    // Workspace source exports are checked together; publish only this package's declarations.
    const result = spawnSync(process.execPath, [require.resolve('typescript/bin/tsc'), '-p', 'tsconfig.json', '--declaration', '--emitDeclarationOnly', '--rewriteRelativeImportExtensions', '--rootDir', '../..', '--outDir', declarations], { cwd: root, stdio: 'inherit' });
    if (result.status !== 0) throw new Error(`Declaration generation failed: ${root}`);
    await cp(path.join(declarations, 'packages', path.basename(root), 'src'), dist, { recursive: true });
  } finally { await rm(declarations, { recursive: true, force: true }); }
  console.log(`Built ${pkg.name}: JavaScript and declarations.`);
}