Add script to auto-generate package exports field

Author: teneplaysofficial

package.json

@@ -69,6 +69,7 @@
     "format:check": "prettier --check .",
     "prepare": "husky",
     "docs": "typedoc",
+    "gen:exports": "node scripts/gen-exports.js",
     "gen:indexes": "node scripts/gen-indexes.js"
   },
   "devDependencies": {

scripts/gen-exports.js

@@ -0,0 +1,47 @@
+import { join, resolve } from 'path';
+import { readdirSync, readFileSync, statSync, writeFileSync } from 'fs';
+
+const cwd = process.cwd();
+
+const DIST_DIR = resolve(cwd, 'dist');
+const packageJson = resolve(cwd, 'package.json');
+
+function getExportsEntries() {
+  const entries = {};
+  const dirs = readdirSync(DIST_DIR);
+  for (const index in dirs) {
+    const path = join(DIST_DIR, dirs[index]);
+    const name = dirs[index];
+    const exportPath = `./${name}`;
+    if (statSync(path).isDirectory()) {
+      entries[exportPath] = {
+        import: `./dist/${name}/index.js`,
+        require: `./dist/${name}/index.cjs`,
+        types: `./dist/${name}/index.d.ts`,
+      };
+    }
+  }
+  return entries;
+}
+
+function generateExportsField() {
+  const exportsField = {
+    '.': {
+      import: './dist/index.js',
+      require: './dist/index.cjs',
+      types: './dist/index.d.ts',
+    },
+    ...getExportsEntries(),
+  };
+
+  return exportsField;
+}
+
+(() => {
+  console.log('Generating "exports" field for package.json...');
+  const pkg = JSON.parse(readFileSync(packageJson, 'utf8'));
+  pkg.exports = generateExportsField();
+  console.log("Writing 'exports' field to package.json...");
+  writeFileSync(packageJson, JSON.stringify(pkg, null, 2) + '\n', 'utf8');
+  console.log('"exports" field generated successfully!');
+})();