Doesn't seem to like vm2 b/c of a library 'contextify'

[aubelsb2]

Perhaps this is a problem with VM2 and the way it manages dependencies (however a bit of digging seems to suggest that contextify.js is now internal to node.js?)

Eitherway with this setup:
package.json

{
  "name": "esbuildvm2",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "vm2": "^3.9.2",
    "esbuild": "^0.8.0"
  },
  "dependencies": {
  },
  "scripts": {
    "build": "esbuild --bundle --outfile=./bundle.js --target=es2020 --platform=node --minify --loader:.ts=ts ./main.ts"
  }
}

tsconfig.json

{
  "compilerOptions": {
    "strict": true,
    "module": "commonjs",
    "lib": ["es2017", "es7", "es6"],
    "target": "es6",
    "sourceMap": true,
    "declaration": true,
    "outDir": "dist",
    "esModuleInterop": true
  },
  "include": ["**/*.ts"],
  "exclude": [
    "**/*.test.ts",
    "**/*.tests.ts",
    "node_modules",
    "dist"
  ]
}

main.ts

import {VM} from 'vm2';

const vm = new VM({
    timeout: 1000,
    sandbox: {}
});
let number = vm.run("1337"); // returns 1337
console.log(number);

I get these results when I try build / run it:

C:\Users\arran_w\WebstormProjects\esbuildvm2>npm run build

> [email protected] build C:\Users\arran_w\WebstormProjects\esbuildvm2
> esbuild --bundle --outfile=./bundle.js --target=es2020 --platform=node --minify --loader:.ts=ts ./main.ts

node_modules/vm2/lib/main.js:638:102: warning: Indirect calls to "require" will not be bundled (surround with a try/catch to silence this warning)
    const _internal = CACHE.contextifyScript.runInContext(_context, DEFAULT_RUN_OPTIONS).call(_context, require, HOST);
                                                                                                        ~~~~~~~
node_modules/vm2/lib/main.js:1226:1: warning: Indirect calls to "require" will not be bundled (surround with a try/catch to silence this warning)
  require,
  ~~~~~~~
2 warnings

C:\Users\arran_w\WebstormProjects\esbuildvm2>node bundle.js
internal/fs/utils.js:230
    throw err;
    ^

Error: ENOENT: no such file or directory, open 'C:\Users\arran_w\WebstormProjects\esbuildvm2/contextify.js'
←[90m    at Object.openSync (fs.js:462:3)←[39m
←[90m    at Object.readFileSync (fs.js:364:35)←[39m
    at _ (C:\Users\arran_w\WebstormProjects\esbuildvm2\bundle.js:1:901)
    at C:\Users\arran_w\WebstormProjects\esbuildvm2\bundle.js:1:1072
    at C:\Users\arran_w\WebstormProjects\esbuildvm2\bundle.js:1:233
    at C:\Users\arran_w\WebstormProjects\esbuildvm2\bundle.js:6:1590
    at C:\Users\arran_w\WebstormProjects\esbuildvm2\bundle.js:1:233
    at Object.<anonymous> (C:\Users\arran_w\WebstormProjects\esbuildvm2\bundle.js:6:1606)
←[90m    at Module._compile (internal/modules/cjs/loader.js:1147:30)←[39m
←[90m    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1167:10)←[39m {
  errno: ←[33m-4058←[39m,
  syscall: ←[32m'open'←[39m,
  code: ←[32m'ENOENT'←[39m,
  path: ←[32m'C:\\Users\\arran_w\\WebstormProjects\\esbuildvm2/contextify.js'←[39m
}

C:\Users\arran_w\WebstormProjects\esbuildvm2>

[evanw]

It looks like this library is kind of incompatible with bundling. It loads content from the file system at run-time using fs.readFileSync() and that content won't be a part of the bundle.

If it's not too much trouble, I believe you can get this to work by manually copying the file node_modules/vm2/lib/contextify.js next to the bundled output file that esbuild generates. This should be enough to get vm2 to work since it looks for __dirname + '/contextify.js' at run-time.

[evanw]

I'm assuming this is answered because of the 👍. Closing.

[aubelsb2]

Actually that was to thanks for the comment I hadn't tested it until now.. Turns out I also needed sandbox.js. I guess this isn't something which will change any time soon?

But thanks I can confirm now that the work around worked.