plugin generator fails when using certain syntax in flat confg eslint.config.js

[philipjfulcher]

Current Behavior

When defining variables outside config in a flat config eslint.config.js, the @nx/plugin:plugin generator fails.

Expected Behavior

When defining variables outside config in a flat config eslint.config.js, the @nx/plugin:plugin generator succeeds.

GitHub Repo

https://github.com/philipjfulcher/eslint-flat-config-repro

Steps to Reproduce

1. Clone https://github.com/philipjfulcher/eslint-flat-config-repro and install packages
2. Run npx nx g plugin my-plugin -d and observe that it succeeds.
3. Checkout branch flat-config where flat config migration has been run.
4. Run npx nx g plugin my-plugin -d and observe that it succeeds.
5. Checkout branch plugin-generator where eslint.config.js has been changed to introduce a variable.
6. Run npx nx g plugin my-plugin -d and observe that it fails with InvalidSymbol in JSON error.

Nx Report

NX   Report complete - copy this into the issue template

Node   : 20.11.1
OS     : darwin-arm64
npm    : 10.2.4

nx                 : 18.2.4
@nx/js             : 18.2.4
@nx/jest           : 18.2.4
@nx/linter         : 18.2.4
@nx/eslint         : 18.2.4
@nx/workspace      : 18.2.4
@nx/angular        : 18.2.4
@nx/devkit         : 18.2.4
@nx/eslint-plugin  : 18.2.4
@nx/plugin         : 18.2.4
@nrwl/tao          : 18.2.4
@nx/web            : 18.2.4
@nx/webpack        : 18.2.4
typescript         : 5.4.5

Failure Logs

NX   InvalidSymbol in JSON at 10:11

   8 |           "enforceBuildableLibDependency":  true,
   9 |           "allow":  [],
> 10 |           depConstraints
     |           ^^^^^^^^^^^^^^
  11 |         },
  12 |       ],
  13 |     },

Package Manager Version

No response

Operating System

• macOS
• Linux
• Windows
• Other (Please specify)

Additional Information

The problem is not isolated to just the shorthand assignment syntax. Changing it to depConstraints: depConstraints has the same problem.

Other generators may have this problem if they also interact with the eslint.config.js file, but I haven't had a chance to check any other.