Elastic Beanstalk Rails 7 app doesn't compile application.scss

Question

I've prepared a Rails 7 app in Elastic Beanstalk, on the Ruby 3.2 running on 64bit Amazon Linux 2023/4.0.12 platform, arm64 processor. To use SCSS instead of CSS, I've changed the application.css file to application.scss. Precompiling assets in production mode in my local environment works just fine RAILS_ENV=production bundle exec rails assets:precompile, but when I deploy, EB doesn't compile the application.scss at all. EB seems to run the task in a different way using rake, it ignores the sass compiler, and doesn't produce a stylesheet at all. The command in question is this one:

/bin/su webapp -c bundle exec rake assets:precompile

Is there some configuration I need to change in EB? Do I need to get it to run rails assets:precompile instead?

```
/bin/su webapp -c bundle exec rake assets:precompile
```

Is there some configuration I need to change in EB? Do I need to get it to run `rails assets:precompile` instead?

Rajat_G · Answer

Hello there,

Hope you are doing well.

==========

From your response I’ve understood that Elastic Beanstalk is not able to compile ‘application.scss’. You have tried using ‘rails assets:precompile’ in your local environment and it works fine. But when you deploy using Beanstalk it is failing.

I tried to create a sample Beanstalk ruby application and found that Beanstalk runs the below command during deployment :

--------------------------------------------------------------------------------------------------------------------

/bin/su webapp -c bundle exec /opt/elasticbeanstalk/config/private/checkforraketask.rb assets:precompile

--------------------------------------------------------------------------------------------------------------------

Here I would like to tell you that you can skip this by setting the ‘RAILS_SKIP_ASSET_COMPILATION’ [1] to true. Then you can try compiling using ebextensions [2] or hooks [3] depending on the use case. You can specify your own command ‘rails assets:precompile’. You can go through this Instance deployment workflow [4] doc to understand how the deployment process works in Beanstalk.

If it is still failing then we would have to look at your environment logs [5] to investigate this issue further. Thus, currently due to the limited information available, I would suggest you to reach out to AWS Elastic Beanstalk Support team with a case efficient troubleshooting. Please share your logs, environment name, Application name, region when you create a case. We’ll be more than happy to assist you with this case.

I sincerely hope that you find the above information useful.

Have a safe and good day ahead.

====

References:

[1] https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/create_deploy_Ruby.container.html
[2] https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/customize-containers-ec2.html
[3] https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/platforms-linux-extend.hooks.html
[4] https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/platforms-linux-extend.workflow.html
[5] https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/using-features.logging.html

Elastic Beanstalk Rails 7 app doesn't compile application.scss

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