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---
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date: "2019-04-15T17:29:00+08:00"
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title: "Migrations Interfaces"
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slug: "migrations-interfaces"
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weight: 30
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2020-12-09 07:47:06 +01:00
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toc: false
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draft: false
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menu:
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sidebar:
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parent: "developers"
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name: "Migrations Interfaces"
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weight: 55
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identifier: "migrations-interfaces"
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---
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# Migration Features
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Complete migrations were introduced in Gitea 1.9.0. It defines two interfaces to support migrating
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repository data from other Git host platforms to Gitea or, in the future, migrating Gitea data to other
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Git host platforms.
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Currently, migrations from GitHub, GitLab, and other Gitea instances are implemented.
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2021-11-17 08:17:37 +01:00
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First of all, Gitea defines some standard objects in packages [modules/migration](https://github.com/go-gitea/gitea/tree/main/modules/migration).
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They are `Repository`, `Milestone`, `Release`, `ReleaseAsset`, `Label`, `Issue`, `Comment`, `PullRequest`, `Reaction`, `Review`, `ReviewComment`.
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## Downloader Interfaces
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To migrate from a new Git host platform, there are two steps to be updated.
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- You should implement a `Downloader` which will be used to get repository information.
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- You should implement a `DownloaderFactory` which will be used to detect if the URL matches and create the above `Downloader`.
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- You'll need to register the `DownloaderFactory` via `RegisterDownloaderFactory` on `init()`.
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2021-11-17 08:17:37 +01:00
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You can find these interfaces in [downloader.go](https://github.com/go-gitea/gitea/blob/main/modules/migration/downloader.go).
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## Uploader Interface
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Currently, only a `GiteaLocalUploader` is implemented, so we only save downloaded
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data via this `Uploader` to the local Gitea instance. Other uploaders are not supported at this time.
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2021-11-17 08:17:37 +01:00
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You can find these interfaces in [uploader.go](https://github.com/go-gitea/gitea/blob/main/modules/migration/uploader.go).
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