1006 lines
29 KiB
Markdown
1006 lines
29 KiB
Markdown
# Guidelines for implementing Enterprise Edition features
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- **Write the code and the tests.**: As with any code, EE features should have
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good test coverage to prevent regressions.
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- **Write documentation.**: Add documentation to the `doc/` directory. Describe
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the feature and include screenshots, if applicable.
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- **Submit a MR to the `www-gitlab-com` project.**: Add the new feature to the
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[EE features list](https://about.gitlab.com/features/).
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## Act as CE when unlicensed
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Since the implementation of [GitLab CE features to work with unlicensed EE instance][ee-as-ce]
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GitLab Enterprise Edition should work like GitLab Community Edition
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when no license is active. So EE features always should be guarded by
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`project.feature_available?` or `group.feature_available?` (or
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`License.feature_available?` if it is a system-wide feature).
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CE specs should remain untouched as much as possible and extra specs
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should be added for EE. Licensed features can be stubbed using the
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spec helper `stub_licensed_features` in `EE::LicenseHelpers`.
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You can force GitLab to act as CE by either deleting the `ee/` directory or by
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setting the [`FOSS_ONLY` environment variable](https://gitlab.com/gitlab-org/gitlab/blob/master/config/helpers/is_ee_env.js)
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to something that evaluates as `true`. The same works for running tests
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(for example `FOSS_ONLY=1 yarn jest`).
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[ee-as-ce]: https://gitlab.com/gitlab-org/gitlab/issues/2500
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## Separation of EE code
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All EE code should be put inside the `ee/` top-level directory. The
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rest of the code should be as close to the CE files as possible.
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### EE-only features
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If the feature being developed is not present in any form in CE, we don't
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need to put the code under the `EE` namespace. For example, an EE model could
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go into: `ee/app/models/awesome.rb` using `Awesome` as the class name. This
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is applied not only to models. Here's a list of other examples:
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- `ee/app/controllers/foos_controller.rb`
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- `ee/app/finders/foos_finder.rb`
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- `ee/app/helpers/foos_helper.rb`
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- `ee/app/mailers/foos_mailer.rb`
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- `ee/app/models/foo.rb`
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- `ee/app/policies/foo_policy.rb`
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- `ee/app/serializers/foo_entity.rb`
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- `ee/app/serializers/foo_serializer.rb`
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- `ee/app/services/foo/create_service.rb`
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- `ee/app/validators/foo_attr_validator.rb`
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- `ee/app/workers/foo_worker.rb`
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- `ee/app/views/foo.html.haml`
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- `ee/app/views/foo/_bar.html.haml`
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This works because for every path that is present in CE's eager-load/auto-load
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paths, we add the same `ee/`-prepended path in [`config/application.rb`].
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This also applies to views.
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[`config/application.rb`]: https://gitlab.com/gitlab-org/gitlab/blob/925d3d4ebc7a2c72964ce97623ae41b8af12538d/config/application.rb#L42-52
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### EE features based on CE features
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For features that build on existing CE features, write a module in the `EE`
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namespace and inject it in the CE class, on the last line of the file that the
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class resides in. This makes conflicts less likely to happen during CE to EE
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merges because only one line is added to the CE class - the line that injects
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the module. For example, to prepend a module into the `User` class you would use
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the following approach:
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```ruby
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class User < ActiveRecord::Base
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# ... lots of code here ...
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end
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User.prepend_if_ee('EE::User')
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```
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Do not use methods such as `prepend`, `extend`, and `include`. Instead, use
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`prepend_if_ee`, `extend_if_ee`, or `include_if_ee`. These methods take a
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_String_ containing the full module name as the argument, not the module itself.
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Since the module would require an `EE` namespace, the file should also be
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put in an `ee/` sub-directory. For example, we want to extend the user model
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in EE, so we have a module called `::EE::User` put inside
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`ee/app/models/ee/user.rb`.
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This is also not just applied to models. Here's a list of other examples:
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- `ee/app/controllers/ee/foos_controller.rb`
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- `ee/app/finders/ee/foos_finder.rb`
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- `ee/app/helpers/ee/foos_helper.rb`
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- `ee/app/mailers/ee/foos_mailer.rb`
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- `ee/app/models/ee/foo.rb`
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- `ee/app/policies/ee/foo_policy.rb`
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- `ee/app/serializers/ee/foo_entity.rb`
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- `ee/app/serializers/ee/foo_serializer.rb`
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- `ee/app/services/ee/foo/create_service.rb`
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- `ee/app/validators/ee/foo_attr_validator.rb`
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- `ee/app/workers/ee/foo_worker.rb`
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#### Overriding CE methods
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To override a method present in the CE codebase, use `prepend`. It
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lets you override a method in a class with a method from a module, while
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still having access the class's implementation with `super`.
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There are a few gotchas with it:
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- you should always [`extend ::Gitlab::Utils::Override`](utilities.md#override) and use `override` to
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guard the "overrider" method to ensure that if the method gets renamed in
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CE, the EE override won't be silently forgotten.
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- when the "overrider" would add a line in the middle of the CE
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implementation, you should refactor the CE method and split it in
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smaller methods. Or create a "hook" method that is empty in CE,
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and with the EE-specific implementation in EE.
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- when the original implementation contains a guard clause (e.g.
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`return unless condition`), we cannot easily extend the behaviour by
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overriding the method, because we can't know when the overridden method
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(i.e. calling `super` in the overriding method) would want to stop early.
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In this case, we shouldn't just override it, but update the original method
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to make it call the other method we want to extend, like a [template method
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pattern](https://en.wikipedia.org/wiki/Template_method_pattern).
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For example, given this base:
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```ruby
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class Base
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def execute
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return unless enabled?
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# ...
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# ...
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end
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end
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```
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Instead of just overriding `Base#execute`, we should update it and extract
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the behaviour into another method:
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```ruby
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class Base
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def execute
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return unless enabled?
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do_something
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end
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private
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def do_something
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# ...
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# ...
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end
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end
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```
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Then we're free to override that `do_something` without worrying about the
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guards:
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```ruby
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module EE::Base
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extend ::Gitlab::Utils::Override
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override :do_something
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def do_something
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# Follow the above pattern to call super and extend it
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end
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end
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```
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This would require updating CE first, or make sure this is back ported to CE.
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When prepending, place them in the `ee/` specific sub-directory, and
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wrap class or module in `module EE` to avoid naming conflicts.
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For example to override the CE implementation of
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`ApplicationController#after_sign_out_path_for`:
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```ruby
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def after_sign_out_path_for(resource)
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current_application_settings.after_sign_out_path.presence || new_user_session_path
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end
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```
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Instead of modifying the method in place, you should add `prepend` to
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the existing file:
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```ruby
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class ApplicationController < ActionController::Base
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# ...
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def after_sign_out_path_for(resource)
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current_application_settings.after_sign_out_path.presence || new_user_session_path
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end
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# ...
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end
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ApplicationController.prepend_if_ee('EE::ApplicationController')
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```
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And create a new file in the `ee/` sub-directory with the altered
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implementation:
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```ruby
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module EE
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module ApplicationController
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extend ::Gitlab::Utils::Override
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override :after_sign_out_path_for
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def after_sign_out_path_for(resource)
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if Gitlab::Geo.secondary?
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Gitlab::Geo.primary_node.oauth_logout_url(@geo_logout_state)
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else
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super
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end
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end
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end
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end
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```
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##### Overriding CE class methods
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The same applies to class methods, except we want to use
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`ActiveSupport::Concern` and put `extend ::Gitlab::Utils::Override`
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within the block of `class_methods`. Here's an example:
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```ruby
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module EE
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module Groups
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module GroupMembersController
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extend ActiveSupport::Concern
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class_methods do
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extend ::Gitlab::Utils::Override
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override :admin_not_required_endpoints
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def admin_not_required_endpoints
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super.concat(%i[update override])
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end
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end
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end
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end
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end
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```
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#### Use self-descriptive wrapper methods
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When it's not possible/logical to modify the implementation of a method, then
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wrap it in a self-descriptive method and use that method.
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For example, in GitLab-FOSS, the only user created by the system is `User.ghost`
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but in EE there are several types of bot-users that aren't really users. It would
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be incorrect to override the implementation of `User#ghost?`, so instead we add
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a method `#internal?` to `app/models/user.rb`. The implementation will be:
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```ruby
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def internal?
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ghost?
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end
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```
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In EE, the implementation `ee/app/models/ee/users.rb` would be:
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```ruby
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override :internal?
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def internal?
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super || bot?
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end
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```
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### Code in `config/routes`
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When we add `draw :admin` in `config/routes.rb`, the application will try to
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load the file located in `config/routes/admin.rb`, and also try to load the
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file located in `ee/config/routes/admin.rb`.
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In EE, it should at least load one file, at most two files. If it cannot find
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any files, an error will be raised. In CE, since we don't know if there will
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be an EE route, it will not raise any errors even if it cannot find anything.
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This means if we want to extend a particular CE route file, just add the same
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file located in `ee/config/routes`. If we want to add an EE only route, we
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could still put `draw :ee_only` in both CE and EE, and add
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`ee/config/routes/ee_only.rb` in EE, similar to `render_if_exists`.
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### Code in `app/controllers/`
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In controllers, the most common type of conflict is with `before_action` that
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has a list of actions in CE but EE adds some actions to that list.
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The same problem often occurs for `params.require` / `params.permit` calls.
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**Mitigations**
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Separate CE and EE actions/keywords. For instance for `params.require` in
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`ProjectsController`:
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```ruby
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def project_params
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params.require(:project).permit(project_params_attributes)
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end
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# Always returns an array of symbols, created however best fits the use case.
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# It _should_ be sorted alphabetically.
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def project_params_attributes
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%i[
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description
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name
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path
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]
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end
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```
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In the `EE::ProjectsController` module:
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```ruby
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def project_params_attributes
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super + project_params_attributes_ee
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end
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def project_params_attributes_ee
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%i[
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approvals_before_merge
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approver_group_ids
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approver_ids
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...
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]
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end
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```
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### Code in `app/models/`
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EE-specific models should `extend EE::Model`.
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For example, if EE has a specific `Tanuki` model, you would
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place it in `ee/app/models/ee/tanuki.rb`.
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### Code in `app/views/`
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It's a very frequent problem that EE is adding some specific view code in a CE
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view. For instance the approval code in the project's settings page.
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**Mitigations**
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Blocks of code that are EE-specific should be moved to partials. This
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avoids conflicts with big chunks of HAML code that are not fun to
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resolve when you add the indentation to the equation.
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EE-specific views should be placed in `ee/app/views/`, using extra
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sub-directories if appropriate.
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### Code in `lib/gitlab/background_migration/`
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When you create EE-only background migrations, you have to plan for users that
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downgrade GitLab EE to CE. In other words, every EE-only migration has to be present in
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CE code but with no implementation, instead you need to extend it on EE side.
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GitLab CE:
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```ruby
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# lib/gitlab/background_migration/prune_orphaned_geo_events.rb
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module Gitlab
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module BackgroundMigration
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class PruneOrphanedGeoEvents
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def perform(table_name)
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end
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end
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end
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end
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Gitlab::BackgroundMigration::PruneOrphanedGeoEvents.prepend_if_ee('EE::Gitlab::BackgroundMigration::PruneOrphanedGeoEvents')
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```
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GitLab EE:
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```ruby
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# ee/lib/ee/gitlab/background_migration/prune_orphaned_geo_events.rb
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module EE
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module Gitlab
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module BackgroundMigration
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module PruneOrphanedGeoEvents
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extend ::Gitlab::Utils::Override
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override :perform
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def perform(table_name = EVENT_TABLES.first)
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return if ::Gitlab::Database.read_only?
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deleted_rows = prune_orphaned_rows(table_name)
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table_name = next_table(table_name) if deleted_rows.zero?
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::BackgroundMigrationWorker.perform_in(RESCHEDULE_DELAY, self.class.name.demodulize, table_name) if table_name
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end
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end
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end
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end
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end
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```
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#### Using `render_if_exists`
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Instead of using regular `render`, we should use `render_if_exists`, which
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will not render anything if it cannot find the specific partial. We use this
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so that we could put `render_if_exists` in CE, keeping code the same between
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CE and EE.
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The advantages of this:
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- Very clear hints about where we're extending EE views while reading CE code.
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The disadvantage of this:
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- If we have typos in the partial name, it would be silently ignored.
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##### Caveats
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The `render_if_exists` view path argument must be relative to `app/views/` and `ee/app/views`.
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Resolving an EE template path that is relative to the CE view path will not work.
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```haml
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- # app/views/projects/index.html.haml
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= render_if_exists 'button' # Will not render `ee/app/views/projects/_button` and will quietly fail
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= render_if_exists 'projects/button' # Will render `ee/app/views/projects/_button`
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```
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#### Using `render_ce`
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For `render` and `render_if_exists`, they search for the EE partial first,
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and then CE partial. They would only render a particular partial, not all
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partials with the same name. We could take the advantage of this, so that
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the same partial path (e.g. `shared/issuable/form/default_templates`) could
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be referring to the CE partial in CE (i.e.
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`app/views/shared/issuable/form/_default_templates.html.haml`), while EE
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partial in EE (i.e.
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`ee/app/views/shared/issuable/form/_default_templates.html.haml`). This way,
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we could show different things between CE and EE.
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However sometimes we would also want to reuse the CE partial in EE partial
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because we might just want to add something to the existing CE partial. We
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could workaround this by adding another partial with a different name, but it
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would be tedious to do so.
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In this case, we could as well just use `render_ce` which would ignore any EE
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partials. One example would be
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`ee/app/views/shared/issuable/form/_default_templates.html.haml`:
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``` haml
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- if @project.feature_available?(:issuable_default_templates)
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= render_ce 'shared/issuable/form/default_templates'
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- elsif show_promotions?
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= render 'shared/promotions/promote_issue_templates'
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```
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In the above example, we can't use
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`render 'shared/issuable/form/default_templates'` because it would find the
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same EE partial, causing infinite recursion. Instead, we could use `render_ce`
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so it ignores any partials in `ee/` and then it would render the CE partial
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(i.e. `app/views/shared/issuable/form/_default_templates.html.haml`)
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for the same path (i.e. `shared/issuable/form/default_templates`). This way
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we could easily wrap around the CE partial.
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### Code in `lib/`
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Place EE-specific logic in the top-level `EE` module namespace. Namespace the
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class beneath the `EE` module just as you would normally.
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For example, if CE has LDAP classes in `lib/gitlab/ldap/` then you would place
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EE-specific LDAP classes in `ee/lib/ee/gitlab/ldap`.
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### Code in `lib/api/`
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It can be very tricky to extend EE features by a single line of `prepend_if_ee`,
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and for each different [Grape](https://github.com/ruby-grape/grape) feature, we
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might need different strategies to extend it. To apply different strategies
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easily, we would use `extend ActiveSupport::Concern` in the EE module.
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Put the EE module files following
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[EE features based on CE features](#ee-features-based-on-ce-features).
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#### EE API routes
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For EE API routes, we put them in a `prepended` block:
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```ruby
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module EE
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module API
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module MergeRequests
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extend ActiveSupport::Concern
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prepended do
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params do
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requires :id, type: String, desc: 'The ID of a project'
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end
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resource :projects, requirements: ::API::API::NAMESPACE_OR_PROJECT_REQUIREMENTS do
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# ...
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end
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end
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end
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end
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end
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```
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Note that due to namespace differences, we need to use the full qualifier for some
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constants.
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#### EE params
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We can define `params` and utilize `use` in another `params` definition to
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include params defined in EE. However, we need to define the "interface" first
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in CE in order for EE to override it. We don't have to do this in other places
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due to `prepend_if_ee`, but Grape is complex internally and we couldn't easily
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do that, so we'll follow regular object-oriented practices that we define the
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interface first here.
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|
|
For example, suppose we have a few more optional params for EE. We can move the
|
|
params out of the `Grape::API` class to a helper module, so we can inject it
|
|
before it would be used in the class.
|
|
|
|
```ruby
|
|
module API
|
|
class Projects < Grape::API
|
|
helpers Helpers::ProjectsHelpers
|
|
end
|
|
end
|
|
```
|
|
|
|
Given this CE API `params`:
|
|
|
|
```ruby
|
|
module API
|
|
module Helpers
|
|
module ProjectsHelpers
|
|
extend ActiveSupport::Concern
|
|
extend Grape::API::Helpers
|
|
|
|
params :optional_project_params_ce do
|
|
# CE specific params go here...
|
|
end
|
|
|
|
params :optional_project_params_ee do
|
|
end
|
|
|
|
params :optional_project_params do
|
|
use :optional_project_params_ce
|
|
use :optional_project_params_ee
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
API::Helpers::ProjectsHelpers.prepend_if_ee('EE::API::Helpers::ProjectsHelpers')
|
|
```
|
|
|
|
We could override it in EE module:
|
|
|
|
```ruby
|
|
module EE
|
|
module API
|
|
module Helpers
|
|
module ProjectsHelpers
|
|
extend ActiveSupport::Concern
|
|
|
|
prepended do
|
|
params :optional_project_params_ee do
|
|
# EE specific params go here...
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|
|
```
|
|
|
|
#### EE helpers
|
|
|
|
To make it easy for an EE module to override the CE helpers, we need to define
|
|
those helpers we want to extend first. Try to do that immediately after the
|
|
class definition to make it easy and clear:
|
|
|
|
```ruby
|
|
module API
|
|
class JobArtifacts < Grape::API
|
|
# EE::API::JobArtifacts would override the following helpers
|
|
helpers do
|
|
def authorize_download_artifacts!
|
|
authorize_read_builds!
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
API::JobArtifacts.prepend_if_ee('EE::API::JobArtifacts')
|
|
```
|
|
|
|
And then we can follow regular object-oriented practices to override it:
|
|
|
|
```ruby
|
|
module EE
|
|
module API
|
|
module JobArtifacts
|
|
extend ActiveSupport::Concern
|
|
|
|
prepended do
|
|
helpers do
|
|
def authorize_download_artifacts!
|
|
super
|
|
check_cross_project_pipelines_feature!
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|
|
```
|
|
|
|
#### EE-specific behaviour
|
|
|
|
Sometimes we need EE-specific behaviour in some of the APIs. Normally we could
|
|
use EE methods to override CE methods, however API routes are not methods and
|
|
therefore can't be simply overridden. We need to extract them into a standalone
|
|
method, or introduce some "hooks" where we could inject behavior in the CE
|
|
route. Something like this:
|
|
|
|
```ruby
|
|
module API
|
|
class MergeRequests < Grape::API
|
|
helpers do
|
|
# EE::API::MergeRequests would override the following helpers
|
|
def update_merge_request_ee(merge_request)
|
|
end
|
|
end
|
|
|
|
put ':id/merge_requests/:merge_request_iid/merge' do
|
|
merge_request = find_project_merge_request(params[:merge_request_iid])
|
|
|
|
# ...
|
|
|
|
update_merge_request_ee(merge_request)
|
|
|
|
# ...
|
|
end
|
|
end
|
|
end
|
|
|
|
API::MergeRequests.prepend_if_ee('EE::API::MergeRequests')
|
|
```
|
|
|
|
Note that `update_merge_request_ee` doesn't do anything in CE, but
|
|
then we could override it in EE:
|
|
|
|
```ruby
|
|
module EE
|
|
module API
|
|
module MergeRequests
|
|
extend ActiveSupport::Concern
|
|
|
|
prepended do
|
|
helpers do
|
|
def update_merge_request_ee(merge_request)
|
|
# ...
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|
|
```
|
|
|
|
#### EE `route_setting`
|
|
|
|
It's very hard to extend this in an EE module, and this is simply storing
|
|
some meta-data for a particular route. Given that, we could simply leave the
|
|
EE `route_setting` in CE as it won't hurt and we are just not going to use
|
|
those meta-data in CE.
|
|
|
|
We could revisit this policy when we're using `route_setting` more and whether
|
|
or not we really need to extend it from EE. For now we're not using it much.
|
|
|
|
#### Utilizing class methods for setting up EE-specific data
|
|
|
|
Sometimes we need to use different arguments for a particular API route, and we
|
|
can't easily extend it with an EE module because Grape has different context in
|
|
different blocks. In order to overcome this, we need to move the data to a class
|
|
method that resides in a separate module or class. This allows us to extend that
|
|
module or class before its data is used, without having to place a
|
|
`prepend_if_ee` in the middle of CE code.
|
|
|
|
For example, in one place we need to pass an extra argument to
|
|
`at_least_one_of` so that the API could consider an EE-only argument as the
|
|
least argument. We would approach this as follows:
|
|
|
|
```ruby
|
|
# api/merge_requests/parameters.rb
|
|
module API
|
|
class MergeRequests < Grape::API
|
|
module Parameters
|
|
def self.update_params_at_least_one_of
|
|
%i[
|
|
assignee_id
|
|
description
|
|
]
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
API::MergeRequests::Parameters.prepend_if_ee('EE::API::MergeRequests::Parameters')
|
|
|
|
# api/merge_requests.rb
|
|
module API
|
|
class MergeRequests < Grape::API
|
|
params do
|
|
at_least_one_of(*Parameters.update_params_at_least_one_of)
|
|
end
|
|
end
|
|
end
|
|
```
|
|
|
|
And then we could easily extend that argument in the EE class method:
|
|
|
|
```ruby
|
|
module EE
|
|
module API
|
|
module MergeRequests
|
|
module Parameters
|
|
extend ActiveSupport::Concern
|
|
|
|
class_methods do
|
|
extend ::Gitlab::Utils::Override
|
|
|
|
override :update_params_at_least_one_of
|
|
def update_params_at_least_one_of
|
|
super.push(*%i[
|
|
squash
|
|
])
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|
|
```
|
|
|
|
It could be annoying if we need this for a lot of routes, but it might be the
|
|
simplest solution right now.
|
|
|
|
This approach can also be used when models define validations that depend on
|
|
class methods. For example:
|
|
|
|
```ruby
|
|
# app/models/identity.rb
|
|
class Identity < ActiveRecord::Base
|
|
def self.uniqueness_scope
|
|
[:provider]
|
|
end
|
|
|
|
prepend_if_ee('EE::Identity')
|
|
|
|
validates :extern_uid,
|
|
allow_blank: true,
|
|
uniqueness: { scope: uniqueness_scope, case_sensitive: false }
|
|
end
|
|
|
|
# ee/app/models/ee/identity.rb
|
|
module EE
|
|
module Identity
|
|
extend ActiveSupport::Concern
|
|
|
|
class_methods do
|
|
extend ::Gitlab::Utils::Override
|
|
|
|
def uniqueness_scope
|
|
[*super, :saml_provider_id]
|
|
end
|
|
end
|
|
end
|
|
end
|
|
```
|
|
|
|
Instead of taking this approach, we would refactor our code into the following:
|
|
|
|
```ruby
|
|
# ee/app/models/ee/identity/uniqueness_scopes.rb
|
|
module EE
|
|
module Identity
|
|
module UniquenessScopes
|
|
extend ActiveSupport::Concern
|
|
|
|
class_methods do
|
|
extend ::Gitlab::Utils::Override
|
|
|
|
def uniqueness_scope
|
|
[*super, :saml_provider_id]
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
# app/models/identity/uniqueness_scopes.rb
|
|
class Identity < ActiveRecord::Base
|
|
module UniquenessScopes
|
|
def self.uniqueness_scope
|
|
[:provider]
|
|
end
|
|
end
|
|
end
|
|
|
|
Identity::UniquenessScopes.prepend_if_ee('EE::Identity::UniquenessScopes')
|
|
|
|
# app/models/identity.rb
|
|
class Identity < ActiveRecord::Base
|
|
validates :extern_uid,
|
|
allow_blank: true,
|
|
uniqueness: { scope: Identity::UniquenessScopes.scopes, case_sensitive: false }
|
|
end
|
|
```
|
|
|
|
### Code in `spec/`
|
|
|
|
When you're testing EE-only features, avoid adding examples to the
|
|
existing CE specs. Also do not change existing CE examples, since they
|
|
should remain working as-is when EE is running without a license.
|
|
|
|
Instead place EE specs in the `ee/spec` folder.
|
|
|
|
### Code in `spec/factories`
|
|
|
|
Use `FactoryBot.modify` to extend factories already defined in CE.
|
|
|
|
Note that you cannot define new factories (even nested ones) inside the `FactoryBot.modify` block. You can do so in a
|
|
separate `FactoryBot.define` block as shown in the example below:
|
|
|
|
```ruby
|
|
# ee/spec/factories/notes.rb
|
|
FactoryBot.modify do
|
|
factory :note do
|
|
trait :on_epic do
|
|
noteable { create(:epic) }
|
|
project nil
|
|
end
|
|
end
|
|
end
|
|
|
|
FactoryBot.define do
|
|
factory :note_on_epic, parent: :note, traits: [:on_epic]
|
|
end
|
|
```
|
|
|
|
## JavaScript code in `assets/javascripts/`
|
|
|
|
To separate EE-specific JS-files we should also move the files into an `ee` folder.
|
|
|
|
For example there can be an
|
|
`app/assets/javascripts/protected_branches/protected_branches_bundle.js` and an
|
|
EE counterpart
|
|
`ee/app/assets/javascripts/protected_branches/protected_branches_bundle.js`.
|
|
The corresponding import statement would then look like this:
|
|
|
|
```javascript
|
|
// app/assets/javascripts/protected_branches/protected_branches_bundle.js
|
|
import bundle from '~/protected_branches/protected_branches_bundle.js';
|
|
|
|
// ee/app/assets/javascripts/protected_branches/protected_branches_bundle.js
|
|
// (only works in EE)
|
|
import bundle from 'ee/protected_branches/protected_branches_bundle.js';
|
|
|
|
// in CE: app/assets/javascripts/protected_branches/protected_branches_bundle.js
|
|
// in EE: ee/app/assets/javascripts/protected_branches/protected_branches_bundle.js
|
|
import bundle from 'ee_else_ce/protected_branches/protected_branches_bundle.js';
|
|
```
|
|
|
|
See the frontend guide [performance section](fe_guide/performance.md) for
|
|
information on managing page-specific JavaScript within EE.
|
|
|
|
## Vue code in `assets/javascript`
|
|
|
|
### script tag
|
|
|
|
#### Child Component only used in EE
|
|
|
|
To separate Vue template differences we should [async import the components](https://vuejs.org/v2/guide/components-dynamic-async.html#Async-Components).
|
|
|
|
Doing this allows for us to load the correct component in EE while in CE
|
|
we can load a empty component that renders nothing. This code **should**
|
|
exist in the CE repository as well as the EE repository.
|
|
|
|
```html
|
|
<script>
|
|
export default {
|
|
components: {
|
|
EEComponent: () => import('ee_component/components/test.vue'),
|
|
},
|
|
};
|
|
</script>
|
|
|
|
<template>
|
|
<div>
|
|
<ee-component />
|
|
</div>
|
|
</template>
|
|
```
|
|
|
|
#### For JS code that is EE only, like props, computed properties, methods, etc, we will keep the current approach
|
|
|
|
- Since we [can't async load a mixin](https://github.com/vuejs/vue-loader/issues/418#issuecomment-254032223) we will use the [`ee_else_ce`](../development/ee_features.md#javascript-code-in-assetsjavascripts) alias we already have for webpack.
|
|
- This means all the EE specific props, computed properties, methods, etc that are EE only should be in a mixin in the `ee/` folder and we need to create a CE counterpart of the mixin
|
|
|
|
##### Example
|
|
|
|
```javascript
|
|
import mixin from 'ee_else_ce/path/mixin';
|
|
|
|
{
|
|
mixins: [mixin]
|
|
}
|
|
```
|
|
|
|
- Computed Properties/methods and getters only used in the child import still need a counterpart in CE
|
|
|
|
- For store modules, we will need a CE counterpart too.
|
|
- You can see an MR with an example [here](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/9762)
|
|
|
|
#### `template` tag
|
|
|
|
- **EE Child components**
|
|
- Since we are using the async loading to check which component to load, we'd still use the component's name, check [this example](#child-component-only-used-in-ee).
|
|
|
|
- **EE extra HTML**
|
|
- For the templates that have extra HTML in EE we should move it into a new component and use the `ee_else_ce` dynamic import
|
|
|
|
### Non Vue Files
|
|
|
|
For regular JS files, the approach is similar.
|
|
|
|
1. We will keep using the [`ee_else_ce`](../development/ee_features.md#javascript-code-in-assetsjavascripts) helper, this means that EE only code should be inside the `ee/` folder.
|
|
1. An EE file should be created with the EE only code, and it should extend the CE counterpart.
|
|
1. For code inside functions that can't be extended, the code should be moved into a new file and we should use `ee_else_ce` helper:
|
|
|
|
#### Example
|
|
|
|
```javascript
|
|
import eeCode from 'ee_else_ce/ee_code';
|
|
|
|
function test() {
|
|
const test = 'a';
|
|
|
|
eeCode();
|
|
|
|
return test;
|
|
}
|
|
```
|
|
|
|
## SCSS code in `assets/stylesheets`
|
|
|
|
If a component you're adding styles for is limited to EE, it is better to have a
|
|
separate SCSS file in an appropriate directory within `app/assets/stylesheets`.
|
|
|
|
In some cases, this is not entirely possible or creating dedicated SCSS file is an overkill,
|
|
e.g. a text style of some component is different for EE. In such cases,
|
|
styles are usually kept in stylesheet that is common for both CE and EE, and it is wise
|
|
to isolate such ruleset from rest of CE rules (along with adding comment describing the same)
|
|
to avoid conflicts during CE to EE merge.
|
|
|
|
### Bad
|
|
|
|
```scss
|
|
.section-body {
|
|
.section-title {
|
|
background: $gl-header-color;
|
|
}
|
|
|
|
&.ee-section-body {
|
|
.section-title {
|
|
background: $gl-header-color-cyan;
|
|
}
|
|
}
|
|
}
|
|
```
|
|
|
|
### Good
|
|
|
|
```scss
|
|
.section-body {
|
|
.section-title {
|
|
background: $gl-header-color;
|
|
}
|
|
}
|
|
|
|
// EE-specific start
|
|
.section-body.ee-section-body {
|
|
.section-title {
|
|
background: $gl-header-color-cyan;
|
|
}
|
|
}
|
|
// EE-specific end
|
|
```
|
|
|
|
## GitLab-svgs
|
|
|
|
Conflicts in `app/assets/images/icons.json` or `app/assets/images/icons.svg` can
|
|
be resolved simply by regenerating those assets with
|
|
[`yarn run svg`](https://gitlab.com/gitlab-org/gitlab-svgs).
|