update build system

build.js

+#!/usr/bin/env node
+/* build.js - node build.js [all|cjs|esm|types|clean] */
+const fs = require('fs');
+const path = require('path');
+const { builtinModules } = require('module');
+
+const DIST_DIR = 'dist';
+
+/* ------------------------- utils ------------------------- */
+function readJSONSafe(file, fallback = {}) {
+  try {
+    const p = path.resolve(process.cwd(), file);
+    const txt = fs.readFileSync(p, 'utf8');
+    return JSON.parse(txt);
+  } catch {
+    return fallback;
+  }
+}
+function uniq(arr) { return Array.from(new Set(arr)); }
+function ensureDir(p) { fs.mkdirSync(p, { recursive: true }); }
+function rimraf(p) { if (fs.existsSync(p)) fs.rmSync(p, { recursive: true, force: true }); }
+
+function depsAsExternal(pkg) {
+  const dep = Object.keys(pkg.dependencies || {});
+  const peer = Object.keys(pkg.peerDependencies || {});
+  const names = uniq([...dep, ...peer]);
+  // 覆盖子路径导入（lodash/fp、react/jsx-runtime）
+  return uniq(names.flatMap((n) => [n, `${n}/*`]));
+}
+function nodeBuiltinsExternal() {
+  // 既包含 'fs' 也包含 'node:fs' 形式
+  return uniq([...builtinModules, ...builtinModules.map((m) => `node:${m}`)]);
+}
+async function loadEsbuild() {
+  try { return require('esbuild'); }
+  catch { const mod = await import('esbuild'); return mod.build ? mod : mod.default; }
+}
+function tsconfigPath() { return fs.existsSync('tsconfig.json') ? 'tsconfig.json' : undefined; }
+function entryPointsFromPkg(/*pkg*/) { return ['index.ts']; }
+
+/* ------------------------- esbuild builds ------------------------- */
+async function buildOne(format, options) {
+  const esbuild = await loadEsbuild();
+  const { external, tsconfig, entryPoints } = options;
+  const isCjs = format === 'cjs';
+  const outfile = path.join(DIST_DIR, isCjs ? 'index.cjs' : 'index.mjs');
+
+  ensureDir(path.dirname(outfile));
+  console.log(`[build] ${format} -> ${outfile}`);
+
+  await esbuild.build({
+    entryPoints,
+    outfile,
+    bundle: true,
+    sourcemap: true,
+    format, // 'cjs' | 'esm'
+    platform: isCjs ? 'node' : 'neutral',
+    target: isCjs ? 'es2021' : 'esnext',
+    external, // deps + peerDeps + node builtins (含 node:*)
+    logLevel: 'info',
+    ...(tsconfig ? { tsconfig } : {}),
+  });
+}
+
+/* ------------------------- types via TypeScript API ------------------------- */
+function buildTypesAPI(outDir = DIST_DIR) {
+  let ts;
+  try { ts = require('typescript'); }
+  catch {
+    console.error('[types] Missing dependency: typescript');
+    process.exit(1);
+  }
+
+  const cfgPath = ts.findConfigFile('./', ts.sys.fileExists, 'tsconfig.json');
+
+  let fileNames, options;
+  if (cfgPath) {
+    // 读取 tsconfig.json
+    const { config } = ts.readConfigFile(cfgPath, ts.sys.readFile);
+    const parsed = ts.parseJsonConfigFileContent(config, ts.sys, path.dirname(cfgPath));
+    fileNames = parsed.fileNames;
+    options = parsed.options;
+  } else {
+    // 没有 tsconfig 的降级：仅用 index.ts
+    console.warn('[types] tsconfig.json not found; fallback to index.ts with basic options.');
+    fileNames = ['index.ts'].filter((f) => fs.existsSync(f));
+    options = {
+      moduleResolution: 99, // NodeNext（避免引入 enum 名字，用常量值）
+      target: 99,          // ESNext
+      skipLibCheck: true,
+      strict: true,
+    };
+  }
+
+  // 强制仅输出声明
+  options.declaration = true;
+  options.emitDeclarationOnly = true;
+  options.outDir = outDir;
+  // 为了不受 sourceMap/emit 等其它设置影响
+  options.noEmitOnError = false;
+
+  console.log('[types] Generating .d.ts ...');
+  const program = ts.createProgram(fileNames, options);
+  const pre = ts.getPreEmitDiagnostics(program);
+  const emitResult = program.emit();
+  const diagnostics = pre.concat(emitResult.diagnostics);
+
+  if (diagnostics.length) {
+    const formatHost = {
+      getCanonicalFileName: (p) => p,
+      getCurrentDirectory: ts.sys.getCurrentDirectory,
+      getNewLine: () => ts.sys.newLine,
+    };
+    const message = ts.formatDiagnosticsWithColorAndContext(diagnostics, formatHost);
+    console.error(message);
+    if (emitResult.emitSkipped) {
+      throw new Error('[types] Type generation failed.');
+    }
+  }
+  console.log('[types] Declarations generated.');
+}
+
+/* ------------------------- main dispatcher ------------------------- */
+(async function main() {
+  const sub = (process.argv[2] || 'all').toLowerCase(); // all | cjs | esm | types | clean
+
+  const pkg = readJSONSafe('package.json');
+  const externalFromPkg = depsAsExternal(pkg);
+  // 统一 external：依赖 + peer + Node 内置（含 node:*）
+  const external = uniq([...externalFromPkg, ...nodeBuiltinsExternal()]);
+  const tscPath = tsconfigPath();
+  const entryPoints = entryPointsFromPkg(pkg);
+
+  switch (sub) {
+    case 'clean': {
+      console.log('[clean] remove dist/');
+      rimraf(DIST_DIR);
+      break;
+    }
+    case 'cjs': {
+      await buildOne('cjs', { external, tsconfig: tscPath, entryPoints });
+      break;
+    }
+    case 'esm': {
+      await buildOne('esm', { external, tsconfig: tscPath, entryPoints });
+      break;
+    }
+    case 'types': {
+      ensureDir(DIST_DIR);
+      buildTypesAPI(DIST_DIR);
+      break;
+    }
+    case 'all':
+    default: {
+      console.log('[clean] remove dist/');
+      rimraf(DIST_DIR);
+      await buildOne('cjs', { external, tsconfig: tscPath, entryPoints });
+      await buildOne('esm', { external, tsconfig: tscPath, entryPoints });
+      buildTypesAPI(DIST_DIR);
+      console.log('[build] Done.');
+      break;
+    }
+  }
+})().catch((err) => {
+  console.error('[build] Failed:', err);
+  process.exit(1);
+});

package.json

@@ -14,10 +14,11 @@
   },
   "scripts": {
     "lint": "eslint --fix .",
-    "compile:cjs": "esbuild index.ts --outfile=dist/index.cjs --bundle --sourcemap --platform=node --target=es2019 --external:*",
-    "compile:esm": "esbuild index.ts --outfile=dist/index.mjs --bundle --sourcemap --platform=neutral --target=esnext --external:*",
-    "compile:types": "tsc --emitDeclarationOnly --declaration",
-    "build": "rimraf dist && npm run compile:cjs && npm run compile:esm && npm run compile:types",
+    "build": "node build.js",
+    "build:cjs": "node build.js cjs",
+    "build:esm": "node build.js esm",
+    "build:types": "node build.js types",
+    "clean": "node build.js clean",
     "test": "jest --passWithNoTests",
     "start": "node dist/index.js"
   },