Error: Cannot find module 'babel-runtime/regenerator'

[aadityabhatia]

Installed koa-access by running npm install @uswitch/koa-access. Adding require('@uswitch/koa-access') to my code results in the following error:

Error: Cannot find module 'babel-runtime/regenerator'

node_modules/@uswitch/koa-access/build/koa-access.js references babel-runtime/regenerator but babel-runtime is not a dependency. Possibly the build process is broken.

Running on node v12.16.2 with npm v6.14.4.

[annez]

Hi there @aadityabhatia this is probably an oversight due to the way we have used these packages historically. Do you mind showing us your build process for this?

We'll take a look as to how we can remove that dependency and transpile something appropriate.

[aadityabhatia]

I did not build the package. I installed it from npm and used require to reference it from my code. The following is the simplest way to reproduce the issue.

$ npm i koa @uswitch/koa-access
+ koa@2.11.0                                                                   
+ @uswitch/koa-access@2.4.5                                         
added 44 packages from 24 contributors and audited 58 packages in 2.369s
found 0 vulnerabilities                               

$ echo "require('@uswitch/koa-access');" > server.js

$ node server.js 
internal/modules/cjs/loader.js:983
  throw err;
  ^

Error: Cannot find module 'babel-runtime/regenerator'
Require stack:
- /tmp/tmp.xO0KjUPcu6/node_modules/@uswitch/koa-access/build/koa-access.js
- /tmp/tmp.xO0KjUPcu6/server.js
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:980:15)
    at Function.Module._load (internal/modules/cjs/loader.js:862:27)
    at Module.require (internal/modules/cjs/loader.js:1042:19)
    at require (internal/modules/cjs/helpers.js:77:18)
    at Object.<anonymous> (/tmp/tmp.xO0KjUPcu6/node_modules/@uswitch/koa-access/build/koa-access.js:8:20)
    at Module._compile (internal/modules/cjs/loader.js:1156:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1176:10)
    at Module.load (internal/modules/cjs/loader.js:1000:32)
    at Function.Module._load (internal/modules/cjs/loader.js:899:14)
    at Module.require (internal/modules/cjs/loader.js:1042:19) {
  code: 'MODULE_NOT_FOUND',
  requireStack: [
    '/tmp/tmp.xO0KjUPcu6/node_modules/@uswitch/koa-access/build/koa-access.js',
    '/tmp/tmp.xO0KjUPcu6/server.js'
  ]
}