From a3fad0351f4c2c3d20b1edeaa339969f9e0a56ea Mon Sep 17 00:00:00 2001
From: Lam Wei Li <peteriman@mail.com>
Date: Mon, 4 Jul 2022 00:25:30 +0800
Subject: [PATCH] fix: load CJS appenders for ESM packages

---
 lib/appenders/index.js | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/lib/appenders/index.js b/lib/appenders/index.js
index 3e26c127..2b4b47e1 100644
--- a/lib/appenders/index.js
+++ b/lib/appenders/index.js
@@ -22,10 +22,18 @@ coreAppenders.set('tcp', require('./tcp'));
 const appenders = new Map();
 
 const tryLoading = (modulePath, config) => {
-  debug('Loading module from ', modulePath);
+  let resolvedPath;
+  try {
+    const modulePathCJS = modulePath + '.cjs';
+    resolvedPath = require.resolve(modulePathCJS);
+    debug('Loading module from ', modulePathCJS);
+  } catch (e) {
+    resolvedPath = modulePath;
+    debug('Loading module from ', modulePath);
+  }
   try {
     // eslint-disable-next-line global-require, import/no-dynamic-require
-    return require(modulePath);
+    return require(resolvedPath);
   } catch (e) {
     // if the module was found, and we still got an error, then raise it
     configuration.throwExceptionIf(