In ActiveRecord 4.1+, DATABASE_URL support is baked in. The database.yml file is created as Ruby code that dynamically creates its output by parsing the DATABASE_URL environment variable. If a database.yml file exists, it will be replaced with ActiveRecord 4.1. Before ActiveRecord 4.1, which Rails 4.1+ uses, a database.yml file is created. When an application is deployed, the build phase configures the underlying Rack or Rails application to use the provisioned database if a config directory and a RAILS_ENV or RACK_ENV environment variable exist. The following two process types are always made available: rake: bundle exec rake GEM_PATH is set to the bundler gem vendor directory. GEM_PATH => vendor/bundle/#/bin:/usr/local/bin:/usr/bin:/bin.The following environment variables are set: For more information on why we only support a specific set of bundler versions, see this article about your Bundler version. Applications without BUNDLED WITH in their Gemfile.lock default to bundler: 1.17.3įor more information on available settings, see Bundler configuration.Applications specifying Bundler 1.x in their Gemfile.lock receive bundler: 1.17.3.Applications specifying Bundler 2.x in their Gemfile.lock receive bundler: 2.3.25.If you have a BUNDLED WITH in your Gemfile.lock, then you receive a different version of Bundler: For application dependency resolution and management, bundler is installed based on the contents of your Gemfile.lock. The following libraries are used by the platform for managing and running Ruby applications and can’t be specified.
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