Plugins file fails on lodash import after upgrade to 7.1.0

[kubijo]

Current behavior

When I upgrade my cypress instance from 6.8.0 to 7.1.0 I get an error where cypress thinks that my plugins file has invalid syntax, but the root cause is that it can't import lodash that I use for deep merge of default & our settings.

This used to work fine & I've tried to mitigate this by creating a custom importer akin to this: https://stackoverflow.com/questions/62298396/making-a-dependencys-dependencies-available-with-yarn-2/64242991#64242991 …alas it didn't help

I do have lodash installed in the root "workspace".

**Message:** The plugins file is missing or invalid.

Your `pluginsFile` is set to `…/web-ui/cypress/plugins/index.ts`, but either the file is missing, it contains a syntax error, or threw an error when required. The `pluginsFile` must be a `.js`, `.ts`, or `.coffee` file.

Or you might have renamed the extension of your `pluginsFile`. If that's the case, restart the test runner.

Please fix this, or set `pluginsFile` to `false` if a plugins file is not necessary for your project.

**Details:** Error: Cannot find module 'lodash'
Require stack:
- …/web-ui/cypress/plugins/index.ts
- /home/…/.cache/Cypress/7.1.0/Cypress/resources/app/packages/server/lib/plugins/child/run_plugins.js
- /home/…/.cache/Cypress/7.1.0/Cypress/resources/app/packages/server/lib/plugins/child/index.js
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:887:15)
    at Module._load (internal/modules/cjs/loader.js:732:27)
    at Function.f._load (electron/js2c/asar_bundle.js:5:12684)
    at Module.require (internal/modules/cjs/loader.js:959:19)
    at require (internal/modules/cjs/helpers.js:88:18)
    at Object.<anonymous> (/opt/dev/…/pool/web-ui/cypress/plugins/index.ts:8:19)
    at Module._compile (internal/modules/cjs/loader.js:1078:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1108:10)
    at Module.load (internal/modules/cjs/loader.js:935:32)
    at Module._load (internal/modules/cjs/loader.js:776:14)
    at Function.f._load (electron/js2c/asar_bundle.js:5:12684)
    at Module.require (internal/modules/cjs/loader.js:959:19)
    at require (internal/modules/cjs/helpers.js:88:18)
    at runPlugins (/home/…/.cache/Cypress/7.1.0/Cypress/resources/app/packages/server/lib/plugins/child/run_plugins.js:175:15)
    at Object.<anonymous> (/home/…/.cache/Cypress/7.1.0/Cypress/resources/app/packages/server/lib/plugins/child/index.js:8:25)
    at Module._compile (internal/modules/cjs/loader.js:1078:30)

**Stack trace:**

Error: The plugins file is missing or invalid.

Your pluginsFile is set to …/web-ui/cypress/plugins/index.ts, but either the file is missing, it contains a syntax error, or threw an error when required. The pluginsFile must be a .js, .ts, or .coffee file.

Or you might have renamed the extension of your pluginsFile. If that's the case, restart the test runner.

Please fix this, or set pluginsFile to false if a plugins file is not necessary for your project.
at Object.get (/home/…/.cache/Cypress/7.1.0/Cypress/resources/app/packages/server/lib/errors.js:988:15)
at EventEmitter. (/home/…/.cache/Cypress/7.1.0/Cypress/resources/app/packages/server/lib/plugins/index.js:154:21)
at EventEmitter.emit (events.js:315:20)
at ChildProcess. (/home/…/.cache/Cypress/7.1.0/Cypress/resources/app/packages/server/lib/plugins/util.js:19:22)
at ChildProcess.emit (events.js:315:20)
at emit (internal/child_process.js:903:12)
at processTicksAndRejections (internal/process/task_queues.js:81:21)

### Test code to reproduce
I've tried to reproduce this in the `cypress-test-tiny`, but wasn't able to… if you can point me in some direction I'll provide what's needed

### Versions
- Operating System: Ubuntu 20.10
- Cypress: 7.1.0
- Yarn: 2.4.0-git.20210226.hash-97663a9d with P'n'P enabled & workspaces setup
- Typescript: 4.2.3

[lmiller1990]

Did anything else change other than upgrading cypress? Could you try 6.9 and other version to try isolating the specific version that breaks things?

[kubijo]

No, just this ... I remember trying 7.0, and it was doing this as well, but I'll try now again

[kubijo]

6.9.1 is OK, 7.0.0 has the reported problem plus it starts very slowly, and it reports some new issues to STDOUT

libva error: vaGetDriverNameByIndex() failed with unknown libva error, driver_name = (null)
(node:192669) Warning: Accessing non-existent property 'padLevels' of module exports inside circular dependency
(Use `Cypress --trace-warnings ...` to show where the warning was created)

[jennifer-shehane]

@kubijo We'll need a reproducible example in order to look into this. If you can isolate this and provide a repo. There is likely something more involved than just importing lodash, since you mention using workspaces.

[lmiller1990]

Good to know 6.9.1 -> 7.0.0 is the "breaking point". Happy to take a look once we have a little more info to go on as mentioned above!

PS: the slow startup issue is under investigation. 👍 Cypress will be nice and fast again soon.

[titenis]

having same problem after upgrading to 7 with webpack preprocessor or any other require in plugins file
Error: Cannot find module '@cypress/webpack-preprocessor'
latest 6 version works fine. Only thing that looks like changed is

The bundled Node.js version was upgraded from 12.18.3 to 14.16.0. This could change the behavior of code within the pluginsFile when using the bundled Node.js version of Cypress.

[lmiller1990]

I tried importing lodash in a simple app using Cypress 7 and both node.js 12 and node.js 14 but I had no problems: https://github.com/lmiller1990/cypress-react-template/blob/18355f7093250eee85e5f021785baffb62643b62/cypress/plugins/index.js#L3-L7

Will need a reproduction repo to debug this further.

[brandonchinn178]

I have a repro, it seems to break between Cypress 6.9.1 -> 7.0.0 using Yarn 2, possibly related to #8008.

mkdir foo
cd foo
yarn set version berry
yarn init
yarn add -D cypress lodash

// have cypress initialize file structure
yarn cypress open

echo 'const _ = require("lodash")' >> cypress/plugins/index.js

// succeeds
yarn node cypress/plugins/index.js

// fails
yarn cypress open

[brandonchinn178]

I'm printing out

console.log(module)
console.log(process)

in plugins/index.js and comparing the output between Cypress 6.9.1 and Cypress 7. One thing that stands out is that process.versions for Cypress 6.9.1 contains pnp: '3', while Cypress 7 does not have pnp at all.

The pnp key seems to get added by yarn (docs)

$ yarn node -e 'console.log(process.versions.pnp)'
3

$ node -e 'console.log(process.versions.pnp)'   

Is it possible that Cypress 7 changed it such that process.versions is reset?

[lmiller1990]

I had a poke around but I don't see any place that would be changed. It sounds like you might be onto something, though. We can continue exploring this. Are you able to reproduce this in a simple project that you could share (using yarn and the pnp feature, maybe?)

[brandonchinn178]

The repro is three comments up: #16111 (comment)

[lmiller1990]

I missed that, sorry.

I created a new project using yarn 2, installed lodash, yarn cypress open:

Seems okay 🤔

Maybe I missed something?

[brandonchinn178]

hm you ran yarn cypress open? whats the output of yarn --version? and while we're at it, what's node --version?