Generate defauly exports names based on the default export.

Author: Hyperkid123

scripts/generate-typings.js

@@ -19,17 +19,52 @@ async function generateIndexTypes(from, to) {
   const files = glob
     .sync(`${from}/*/`)
     .filter((name) => !name.includes('/tests/'))
-    .map((path) =>
-      path
-        .replace(/\/$/, '')
-        .split('/')
-        .pop()
-    );
-  const content = `${files.map(
-    (file) => `export { default as ${kebabToCamel(file.split('/').shift())} } from './${file.split('.').shift()}';
+    .map((path) => path.replace(/\/$/, '').split('/').pop());
+  const content = `${files.map((file) => {
+    let module;
+    let exportName;
+    const moduleSource = `${from}/${file.split('.').shift()}/${file}.js`.replace('//', '/');
+    try {
+      module = require(`${to}/${file.split('.').shift()}`);
+    } catch (error) {
+      console.log('Unable to find module: ', moduleSource);
+      module = {};
+      exportName = kebabToCamel(file.split('/').shift());
+    }
+
+    let fileSource;
+    /**
+     * Transform default module name to build index.d.ts export name
+     */
+    if (module.default) {
+      try {
+        fileSource = fse.readFileSync(moduleSource, { encoding: 'utf-8' });
+      } catch (error) {
+        console.error(`Unable to read file ${moduleSource}`);
+        exportName = kebabToCamel(file.split('/').shift());
+      }
+
+      let name = fileSource.match(/export default *[a-zA-Z\d;]+\n/gm);
+      if (name !== null) {
+        name = name.pop().replace('export default', '').replace(/\n/, '').replace(';', '').trim();
+      } else {
+        name = kebabToCamel(file.split('/').shift());
+      }
+
+      exportName = name;
+      if (!name) {
+        throw new Error(`module name missing!: ${file}\n`);
+      }
+    }
+
+    if (!exportName) {
+      exportName = kebabToCamel(file.split('/').shift());
+    }
+
+    return `export { default as ${exportName} } from './${file.split('.').shift()}';
 export * from './${file.split('.').shift()}';
-`
-  )}`.replace(/,/g, '');
+`;
+  })}`.replace(/,/g, '');
   return Promise.all([fse.writeFile(path.resolve(to, 'index.d.ts'), content)]);
 }