2019-07-18 23:04:09 -04:00
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# Developing against interacting components or features
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It's not uncommon that a single code change can reflect and interact with multiple parts of GitLab
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codebase. Furthermore, an existing feature might have an underlying integration or behavior that
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might go unnoticed even by reviewers and maintainers.
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The goal of this section is to briefly list interacting pieces to think about
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when making _backend_ changes that might involve multiple features or [components](architecture.md#components).
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## Uploads
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2020-04-15 11:09:17 -04:00
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GitLab supports uploads to [object storage](https://docs.gitlab.com/charts/advanced/external-object-storage/). That means every feature and
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2020-04-21 11:21:10 -04:00
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change that affects uploads should also be tested against [object storage](https://docs.gitlab.com/charts/advanced/external-object-storage/),
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2019-07-18 23:04:09 -04:00
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which is _not_ enabled by default in [GDK](https://gitlab.com/gitlab-org/gitlab-development-kit).
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When working on a related feature, make sure to enable and test it
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2019-10-11 02:06:27 -04:00
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against [MinIO](https://gitlab.com/gitlab-org/gitlab-development-kit/blob/master/doc/howto/object_storage.md).
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2019-07-18 23:04:09 -04:00
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See also [File Storage in GitLab](file_storage.md).
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## Merge requests
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### Forks
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GitLab supports a great amount of features for [merge requests](../user/project/merge_requests/index.md). One
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of them is the ability to create merge requests from and to [forks](../gitlab-basics/fork-project.md),
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which should also be highly considered and tested upon development phase.
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