How to set as external all node modules in rollup?

Question

I want to have all modules imported from node_modules as external. What is the configuration for this?

I tried without success :

import path from "path";
import glob from "glob";
import multiEntry from "rollup-plugin-multi-entry";

export default {
    entry: "src/**/*.js",
    format: "cjs",
    plugins: [
        multiEntry()
    ],
    external: glob.sync("node_modules/**/*.js").map(file => path.resolve(file)),
    dest: "dist/bundle.js"
}];

or

import multiEntry from "rollup-plugin-multi-entry";

export default {
    entry: "src/**/*.js",
    format: "cjs",
    plugins: [
        multiEntry()
    ],
    external: id => id.indexOf("node_modules") !== -1,
    dest: "dist/bundle.js"
}];

Answer 1

You can accomplish that using package.json dependencies field:

const pkg = require('./package.json');

export default {
    // ...
    external : Object.keys(pkg.dependencies),
    // ...
}