Attempting to upgrade from mdx 1.6.22 to 2.1.2 throwing error: cannot find module estree-walker.

[ajaypillay]

Hi, I've been attempting to ugprade this Meteor package Meteor-mdx from MDX 1.6.22 to MDX 2.1.2.

My current package.js file is as such:

var packages = ["ecmascript", "isobuild:compiler-plugin@1.0.0"]

Package.describe({
	name: "foo",
	version: "0.0.5",
	summary: "Compiler plugin that supports MDX files in Meteor",
	git: "https://github.com/Apollinaire/meteor-mdx",
	documentation: "README.md"
})

Package.registerBuildPlugin({
	name: "compile-mdx",
	use: ["ecmascript", "babel-runtime", "babel-compiler", "caching-compiler"],
	sources: ["compiler.js", "plugin.js"],
	npmDependencies: {
          /* "estree-walker": "3.0.0", */ // Tried adding this in but it didn't change anything
          "@babel/runtime": "7.18.9",
          "@mdx-js/mdx": "2.1.2"
	}
})

Package.onUse(function use(api) {
	api.versionsFrom("1.3.2.4")
	api.use(packages, ["server", "client"])
})

And in my compiler.js file, including any line like import mdx from "@mdx-js/mdx" results in:

=> Errors prevented startup:                  
   
   While loading plugin `compile-mdx` from package `foo`:
   internal/modules/cjs/loader.js:902:15: Cannot find module '/home/.../myProject/packages/foo/.npm/plugin/compile-mdx/node_modules/estree-walker'

I tried manually including estree-walker as shown above but it resulted in the same error.

How should I go about troubleshooting this?

[ChristianMurphy]

meteor-mdx doesn't support MDX 2 yet.
It is calling APIs which don't exist in version 2 https://github.com/Apollinaire/meteor-mdx/blob/0cee4c6ecc664c8a0341fee0cb1dff324b4fa14f/compiler.js#L70 (version 2 API https://mdxjs.com/packages/mdx/)

The dependency issue is just one side effect of it not being designed for version 2.
This would be something to take up with the author(s) of the integration
https://github.com/Apollinaire/meteor-mdx/issues

[ChristianMurphy]

There may also be a deeper issue with meteor not supporting ESM yet (see: meteor/meteor#11727, meteor/meteor#11631, and meteor/meteor#10906)
Which is something the Meteor team may be able to answer questions around and resolve.

[ajaypillay]

Oh yes, I'm aware of the need to update mdx.sync to await compile(), which is part of what I was intending to upgrade. I'll need to look into the ESM bit, thanks.