/bin/rails assets:precompile" did not complete successfully: exit code: 1 randomly fails

[eddygarcas]

Hi,

I saw there was a similar issue in the past regarding this error when precompiling assets. It was suggested that it was a Ruby issue and recommended to wait until Ruby 3.3.1 is released.

In my case, this issue is still happening with the following setup:

Ruby 3.3.1
Kamal 1.7.0
Rails 7.1.3

When running kamal deploy -d staging, I eventually get the following error:

------
kamal-backoffice-service.dockerfile:45
--------------------
  43 |     #    SECRET_KEY_BASE_DUMMY=1 RAILS_MASTER_KEY=$RAILS_MASTER_KEY ./bin/rails assets:precompile
  44 |     
  45 | >>> RUN SECRET_KEY_BASE_DUMMY=1 ./bin/rails assets:precompile
  46 |     
  47 |     # Final stage for app image
--------------------
ERROR: failed to solve: process "/bin/sh -c SECRET_KEY_BASE_DUMMY=1 ./bin/rails assets:precompile" did not complete successfully: exit code: 1

When I run the docker-compose, the whole process works, but running kamal deploy fails. I've also tried to pass the RAILS_MASTER_KEY as an argument into the build process, but it keeps failing:

# Set up a secret mount and precompile assets
RUN --mount=type=secret,id=RAILS_MASTER_KEY \
    RAILS_MASTER_KEY=$(cat /run/secrets/RAILS_MASTER_KEY) && \
    SECRET_KEY_BASE_DUMMY=1 RAILS_MASTER_KEY=$RAILS_MASTER_KEY ./bin/rails assets:precompile

Is anyone else facing the same situation?

[oandalib]

I was attempting to access credentials like so Rails.application.credentials.gmail.username, whereas I should've been accessing it as Rails.application.credentials.dig(:gmail, :username). Making this change solved the issue for me.