feat: Added ts-import support to fetch & transpile Typescript

someimportantcompany · Mar 18, 2024 · bdb1580 · bdb1580
1 parent 008c02e
commit bdb1580
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Showing 4 changed files with 2,603 additions and 58 deletions.
diff --git a/.gitignore b/.gitignore
@@ -1,3 +1,4 @@
 .nyc_output/
+.ts-import-cache/
 coverage/
 node_modules/
diff --git a/lib/handlers.mjs b/lib/handlers.mjs
@@ -1,9 +1,12 @@
 import createDebug from 'debug';
 import fs from 'fs';
 import path from 'path';
+import { fileURLToPath } from 'url';
+import { load as tsImport } from 'ts-import';
 
 import { assert } from './utils.mjs';
 
+const cacheDir = path.join(path.dirname(fileURLToPath(import.meta.url)), '../.ts-import-cache');
 const debug = createDebug('aws-lambda-rie-http');
 
 /**
@@ -35,7 +38,9 @@ export async function getHandler(handlerName) {
   debug(filePath);
   assert(filePath, new Error(`File not found: ${fileName}.(js|cjs|mjs|ts)`));
 
-  const handler = await import(filePath);
+  const handler = filePath.endsWith('.ts')
+    ? await tsImport(filePath, { mode: 'transpile', transpileOptions: { cache: { dir: cacheDir } } })
+    : await import(filePath);
 
   if (handler && handler.default && typeof handler.default[handlerFnName] === 'function') {
     // module.exports.handler = function handler() {}