Netlify function graphql typescript build errors

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1

started with basic function typescript sample. Then when I add import for "apollo-server-lambda’ I get warnings when run build.

*WARNING in ../node_modules/subscriptions-transport-ws/node_modules/ws/lib/buffer-util.js*
*Module not found: Error: Can't resolve 'bufferutil'*
*WARNING in ../node_modules/subscriptions-transport-ws/node_modules/ws/lib/validation.js*
*Module not found: Error: Can't resolve 'utf-8-validate*

package.json:
....
  "scripts": {
    "build": "netlify-lambda build src",
    "ts-check": "tsc --noEmit --lib ES2015 ./src/*.ts"
  },

.babelrc:
{
  "presets": [
    "@babel/preset-typescript",
    [
      "@babel/preset-env",
      {
        "targets": {
          "node": true
        }
      }
    ]
  ]
}
2

what does the dependencies section for your package.json look like?

3

Something I’d like to add is that, you’ve chosen just a src folder for the lambda build?
netlify-lambda is to build your functions, see here: GitHub - netlify/netlify-lambda: Helps building and serving lambda functions locally and in CI environments you’ve got this as your only build command so it feels like you’re attempting to use it to build your site?

4

FYI -
I had the same issue and fixed it by adding this to webpack:

const nodeExternals = require('webpack-node-externals');
Then add externals: nodeExternals(), to the webpack config.

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