How do I install sharp on my AWS Lambda via the CDK with a custom install command?

I have an error message asking me to install a specific version of sharp for my AWS lambda function: npm install --platform=linux --arch=x64 sharp.

Whilst I can do this locally, I believe the CDK just runs npm i sharp, which causes issues.

Current CDK definition:

this.sharpUser = new NodejsFunction(this, `sharpUser-${context.environment}`, {
  runtime: Runtime.NODEJS_18_X,
  handler: "handler",
  entry: join(__dirname, "./sharpUser.ts"),
  bundling: {
    nodeModules: ["sharp", "@aws-sdk/client-s3"],
    externalModules: ["aws-sdk"],
  },
});

Error:

  Something went wrong installing the \"sharp\" module
  
  Cannot find module '../build/Release/sharp-linux-x64.node'
  Require stack:
  - /var/task/node_modules/sharp/lib/sharp.js
  - /var/task/node_modules/sharp/lib/constructor.js
  - /var/task/node_modules/sharp/lib/index.js
  - /var/task/index.js
  - /var/runtime/index.mjs
  
  Possible solutions:
  - Install with verbose logging and look for errors: \"npm install --ignore-scripts=false --foreground-scripts --verbose sharp\"
  - Install for the current linux-x64 runtime: \"npm install --platform=linux --arch=x64 sharp\"
  - Consult the installation documentation: https://sharp.pixelplumbing.com/install",

this is how i got it working:

my cdk config for my nodejs function as follow:

 bundling: {
      nodeModules: ["sharp"],
      forceDockerBundling: true, // force docker bundling for sharp
 },
memorySize: 2048,
timeout: Duration.minutes(2)

then i went into my src folder , where the lambda code is stored. Initialized a new project using npm:

npm init -y
npm install sharp

then import sharp lib as normal and use it:

import sharp from "sharp";

if using typescript you may need set this ts config file "esModuleInterop": true

not the cleanest solution, but it worked for me

if not u can look up image-resizer-service by AWS and use that.