From a9f361c73aa1b103dc50a73a88e5f9c9d73faf7f Mon Sep 17 00:00:00 2001
From: DongYoung Kim <dongyoung.kim@voyagerx.com>
Date: Wed, 24 Apr 2024 02:37:29 +0900
Subject: [PATCH 1/2] Add preLoadModules option to import modules on main
 thread

---
 src/ServerlessOffline.js     | 18 ++++++++++++++++++
 src/config/commandOptions.js |  4 ++++
 src/config/defaultOptions.js |  1 +
 3 files changed, 23 insertions(+)

diff --git a/src/ServerlessOffline.js b/src/ServerlessOffline.js
index 7d3f4ea32..6812dfb0d 100644
--- a/src/ServerlessOffline.js
+++ b/src/ServerlessOffline.js
@@ -63,6 +63,8 @@ export default class ServerlessOffline {
   async start() {
     this.#mergeOptions()
 
+    this.#preLoadModules()
+
     const {
       albEvents,
       httpEvents,
@@ -417,6 +419,18 @@ export default class ServerlessOffline {
     }
   }
 
+  #preLoadModules() {
+    const { preLoadModules } = this.#options
+    const modules = preLoadModules.split(",")
+    modules.forEach((module) => {
+      try {
+        import(module)
+      } catch (err) {
+        log.error(`Error importing module ${module}: ${err}`)
+      }
+    })
+  }
+
   // TODO FIXME
   // TEMP quick fix to expose for testing, look for better solution
   internals() {
@@ -440,6 +454,10 @@ export default class ServerlessOffline {
       mergeOptions: () => {
         this.#mergeOptions()
       },
+
+      preLoadModules: () => {
+        this.#preLoadModules()
+      },
     }
   }
 }
diff --git a/src/config/commandOptions.js b/src/config/commandOptions.js
index 9de897155..ec445f80f 100644
--- a/src/config/commandOptions.js
+++ b/src/config/commandOptions.js
@@ -135,4 +135,8 @@ export default {
     type: "string",
     usage: "Websocket port to listen on. Default: 3001.",
   },
+  preLoadModules: {
+    type: "string",
+    usage: "A comma separated list of modules to preload on the main thread",
+  },
 }
diff --git a/src/config/defaultOptions.js b/src/config/defaultOptions.js
index 9159204c6..5d6c31c6f 100644
--- a/src/config/defaultOptions.js
+++ b/src/config/defaultOptions.js
@@ -28,4 +28,5 @@ export default {
   webSocketHardTimeout: 7200,
   webSocketIdleTimeout: 600,
   websocketPort: 3001,
+  preLoadModules: '',
 }

From 707fa6bc2dcae7fa1be5d31a4ab2b89f93ef91b8 Mon Sep 17 00:00:00 2001
From: DongYoung Kim <dongyoung.kim@voyagerx.com>
Date: Mon, 19 Aug 2024 23:17:06 +0900
Subject: [PATCH 2/2] Add README document

---
 README.md | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/README.md b/README.md
index 78a202a59..1246d300e 100644
--- a/README.md
+++ b/README.md
@@ -239,6 +239,11 @@ Default: 600 (10 minutes)
 WebSocket port to listen on.<br />
 Default: 3001
 
+#### preLoadModules
+
+Pre-load specified modules in the main thread to avoid crashes when importing in worker threads. Provide module names as a comma-separated list (e.g., "sharp,canvas").<br />
+Default: ''
+
 Any of the CLI options can be added to your `serverless.yml`. For example:
 
 ```yml