Slug Compilation on Heroku ENV -> STAGING fails

[exocode]

Hi there,
I got this error when I try to deploy on STAGING environment

rake aborted! Must supply cloud_name in tag or in configuration (in /tmp/build_963b09e2-9363-4e08-b60f-56f44f98464d/app/assets/stylesheets/application.scss)

ENV Variables:

CLOUDINARY_API_KEY:      123456789
CLOUDINARY_API_SECRET:   abcdefghijklmnopqrsuvwxyz
CLOUDINARY_CLOUD_NAME:   abc123456789
CLOUDINARY_URL:          cloudinary://123456789:abcdefghijklmnopqrsuvwxyz@abc123456789
RACK_ENV:                staging
RAILS_ENV:               staging

My cloudinary.yml looks like this:

development:
  cloud_name: <%= ENV['CLOUDINARY_CLOUD_NAME'] %>
  api_key: <%= ENV['CLOUDINARY_API_KEY'] %>
  api_secret: <%= ENV['CLOUDINARY_API_SECRET'] %>
  enhance_image_tag: true
  static_image_support: false    
production:
  cloud_name: <%= ENV['CLOUDINARY_CLOUD_NAME'] %>
  api_key: <%= ENV['CLOUDINARY_API_KEY'] %>
  api_secret: <%= ENV['CLOUDINARY_API_SECRET'] %>
  enhance_image_tag: true
  static_image_support: true
staging:
  <<: *production
test:
  cloud_name: <%= ENV['CLOUDINARY_CLOUD_NAME'] %>
  api_key: <%= ENV['CLOUDINARY_API_KEY'] %>
  api_secret: <%= ENV['CLOUDINARY_API_SECRET'] %>
  enhance_image_tag: true
  static_image_support: false

How can I resolve that?

many, many thanks

[TalLevAmi]

The environment is not available in Heroku during asset pre-compilation see https://devcenter.heroku.com/articles/rails-asset-pipeline#assets-precompile-failures and the discussion here #21
Hard coding your cloud_name in cloudinary.yml should solve the issue. Alternatively, you can try to use https://devcenter.heroku.com/articles/labs-user-env-compile though it is considered experimental.