Remove mention of Heroku CI support

[Pro777]

Heroku's cedar-14 stack is now EOL.

The heroku buildpack required for Cypress to function is not compatible with newer stacks, so can references to compatibility with Heroku CI be removed?

[flotwig]

Hey @Pro777, yeah, I tried updating the stack to heroku-18 in #325 and it fails with this error:

-----> Xvfb Google Chrome app detected
 !     The Google Chrome Xvfb buildpack is only supported on Cedar-14.
 !     For newer stacks you must instead use Google Chrome Buildpack,
 !     which runs Chrome in headless mode without Xvfb.
 !     For more details use:
 !     https://devcenter.heroku.com/articles/heroku-ci#known-issues

I don't think that Heroku CI should be removed, as cedar-14 still "works", but it is very old and definitely needs to be updated. I see @bahmutov has run in to this before: #214

I don't see why xvfb wouldn't work in heroku-18, so I think if the buildpack was updated to work with heroku-18, this could be fixed.

---

Or, cypress-io/cypress#832 would make Cypress compatible with Chrome Headless, and no xvfb would be needed.

[bahmutov]

Well, cedar-14 is mostly failing with SIGILL like #385 so it would be nice to fully support headless Cypress (right now we can do headless browser mode, but not Cypress itself, right @flotwig)

[flotwig]

correct @bahmutov, Electron still needs a display manager to run, so we still need xvfb-run just for Electron... once we remove Electron from cypress's core, it will not need xvfb for headless mode

[bahmutov]

I will disable our CI Heroku project, because it just keeps failing, breaking our status checks, but I will keep this issue open, because once we remove Electron we should enable it back

[erwanriou]

Ok interesting, I was fighting with heroku and not understunding why i had this SIGILL Error since i was folowing all the steps. I had the project detected in cypress dashboard (but no info about it). So this is due to this deprecated build of chrome.

So @bahmutov do we have a roadmap of when electron will be removed?

[jennifer-shehane]

You can follow the issue about removing Electron from Cypress core here: cypress-io/cypress#3899

[Pro777]

Cedar-14 stack EOL has been delayed until November 2, 2020 due to COVID-19.

[savannahp]

I am currently writing a bunch of cypress test right now and we use Heroku CLI, will this not work if we want to make it part of the pipeline?

[bahmutov]

Unfortunately because of Heroku limitations I don't think Cypress can run on it unless we make it fully headless so it does not need xvfb. I would suggest trying another CI that could even be triggered after Heroku finishes the deploy

[xyNNN]

I would like to use cypress on the heroku ci. Is there no other way to make it work?

[sec0ndhand]

I'm sorry this issue got re-opened, but it looks like there is some hope with this issue/pr