Auto-Detect "index.cjs" files as primary for node functions

[hossam-nasr]

What problem would the feature you're requesting solve? Please describe.

This issue is implemented in #8205

In the JavaScript world, there are two ways to import/export modules: CommonJS (default for node) and ES Modules (default for JavaScript).

The default for Azure Functions is to support exported functions in the CommonJS format, as follows:

module.exports = async function (context, req) {
    context.log('JavaScript HTTP trigger function processed a request.');
    context.res = { 
        status: 200
    };
};

We also now support ES Modules in preview, as follows:

export const httpTrigger = async function (context, req) {
    context.log('JavaScript HTTP trigger function processed a request.');
    context.res = {
        status: 200
    };
};

Currently, the only way we support ESM is if the file ends with the .mjs extension. However, we also want to respect the type property of package.json files, as described in this issue in the node worker. To fully support this, we need to support .cjs extension files as well, as described here.

This issue on the host side is to automatically detect index.cjs files as the scriptFile for node functions, in addition to the existing index.js and index.mjs.

Describe the solution you'd like

The Host automatically detects index.cjs files as the scriptFile for node functions, if index.js and index.mjs are not present. Implementation in #8205

[hossam-nasr]

Closing this issue, addressed here: #8205