Why Heroku don't use the good manifest.yml
问题 I use Rails 3.2.2 on Heroku with CDN (CloudFront) to host assets. I try the Heroku tutorial (https://devcenter.heroku.com/articles/cdn-asset-host-rails31) with asset_sync gem. There is no problem with the assets:precompile, all my assets are hosted on my S3 bucket. -->heroku run bundle exec rake assets:precompile Running bundle exec rake assets:precompile attached to terminal... up, run.1 AssetSync: using default configuration from built-in initializer AssetSync: Syncing. Using: Manifest /app