Use Cypress plugins with synpress?

[cs-balazs]

Is it possible to use Cypress plugins?
I defined these in cypress.json:

{
  "supportFile": "cypress/support/index.js",
  "pluginsFile": "cypress/plugins/index.js",
}

But the plugins only seem to be loaded when using synpress open not with synpress run.
I would like to use cypress-file-upload and custom commands.

I also can't see any plugin-related folders is the example project structure in the README.

[maxhoheiser]

I think currently the issue is that synpress is not loading the cypress index.js, since I can also not define commands there, therefor plugins defined there are also not taken into consideration, my workaround is to use a forked version of synpress currently and modify the synpress index.js to my needs

[cs-balazs]

I think currently the issue is that synpress is not loading the cypress index.js, since I can also not define commands there, therefor plugins defined there are also not taken into consideration, my workaround is to use a forked version of synpress currently and modify the synpress index.js to my needs

Thanks for the response! I ended up doing the following as a workaround:
Plugins file (cypress/plugins/index.js in my case):

import synpressPlugins from "@synthetixio/synpress/plugins"

module.exports = (on, config) => {
  synpressPlugins(on, config)
}

Support file (cypress/support/index.js in my case):

import "./commands"
import "@synthetixio/synpress/support"

I'm passing this option to synpress run: --config supportFile='cypress/support/index.js',pluginsFile='cypress/plugins/index.js'.
Commands defined in cypress/support/commands.js do get loaded this way. I'm guessing plugins like cypress-file-upload also work, but couldn't test it yet.

[maxhoheiser]

Nice workaround!
I tried something similar too, but instead of directly passing it into the synpress run, I specified the supportFile in my synpress.json configuration file like so:

{
...
  "supportFile": "support/index.js"
}

And I pass the config file to the synpress run like so: synpress run -cf synpress.js - but that is not working 🤔

[cs-balazs]

That's how I also tried originally. For some reason this way the commands only seemed to load with synpress open.
I just tried cypress-file-upload with the workaround I posted, and it also works, however, I also needed to pass fixturesFolder='cypress/fixtures' in my synpress run command, as that one also seems to be ignored when defined in the config file.

The whole command looks like this:
synpress run --configFile cypress.json --config supportFile='cypress/support/index.js',pluginsFile='cypress/plugins/index.js',fixturesFolder='cypress/fixtures' -b chromium

Closing the issue, since my original problem has been resolved.