Function works on local test bench but wont deploy

Question

I have a classifier.mjs file that runs fine locally but wont deploy

It will deploy if I remove the @xenova/transformer import but I cant work out why - any ideas?

import { app } from '@azure/functions';
import path from 'path';

import { pipeline, env } from '@xenova/transformers';

env.allowLocalModels = true;
env.allowRemoteModels = false;
env.localModelPath = path.join(process.cwd(),"/src/functions/models");

app.http('classifyTicket', {
    methods: ['GET', 'POST'],
    authLevel: 'anonymous',
    handler: async (request, context) => {
        context.log(`Http function processed request for url "${request.url}"`);

        const classifier = await pipeline("text-classification", "/ICTBertClassifier");
        
        const name = request.query.get('name') || await request.text() || 'world';

        context.log(name)

        const classifiedText = await classifier(name);

        return { body: JSON.stringify(classifiedText) };

    }
});

Answer 1

Hi Joseff,

You need to add that dependencies to package.json in order to include that library.

{
  "type": "module",
  "main": "index.mjs",
  "dependencies": {
    "@xenova/transformers": "^1.0.0"  // Ensure you have the correct version
  }
}

References:

• https://learn.microsoft.com/en-us/azure/azure-functions/functions-reference-node?tabs=javascript%2Cwindows%2Cazure-cli&pivots=nodejs-model-v4
• https://techcommunity.microsoft.com/t5/apps-on-azure-blog/run-node-js-14-in-azure-functions/ba-p/2195063
• https://learn.microsoft.com/en-us/answers/questions/1333087/how-can-i-get-my-azure-function-app-to-support-ecm

If the information helped address your question, please Accept the answer.

Luis

Answer 2

To install npm package, you can use below command in the root of your function project. -d option will save the package to the package.json file.

You can also go to the function app's deployment tab to view more details of the error during the deployment. the function app actually does the build on the server side.

npm install @xenova/transformers -d

Answer 3

Thanks for the info - the issue ended up being related to the function being a linux function and me developing it in windows.

Set up WSL so I could build it in linux and all seems ok now