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722a7c902d
In investigating #7947 it has become clear that the storage component of go-git repositories needs closing. This PR adds this Close function and adds the Close functions as necessary. In TransferOwnership the ctx.Repo.GitRepo is closed if it is open to help prevent the risk of multiple open files. Fixes #7947
75 lines
2.3 KiB
Markdown
75 lines
2.3 KiB
Markdown
---
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date: "2019-04-15T17:29:00+08:00"
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title: "Advanced: Migrations Interfaces"
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slug: "migrations-interfaces"
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weight: 30
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toc: true
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draft: false
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menu:
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sidebar:
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parent: "advanced"
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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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The new migration features were introduced in Gitea 1.9.0. It defines two interfaces to support migrating
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repositories data from other git host platforms to gitea or, in the future migrating gitea data to other
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git host platforms. Currently, only the migrations from github via APIv3 to Gitea is implemented.
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First of all, Gitea defines some standard objects in packages `modules/migrations/base`. They are
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`Repository`, `Milestone`, `Release`, `Label`, `Issue`, `Comment`, `PullRequest`.
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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 get all kinds of repository informations.
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- You should implement a `DownloaderFactory` which is used to detect if the URL matches and
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create a Downloader.
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- You'll need to register the `DownloaderFactory` via `RegisterDownloaderFactory` on init.
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```Go
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type Downloader interface {
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GetRepoInfo() (*Repository, error)
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GetTopics() ([]string, error)
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GetMilestones() ([]*Milestone, error)
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GetReleases() ([]*Release, error)
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GetLabels() ([]*Label, error)
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GetIssues(start, limit int) ([]*Issue, error)
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GetComments(issueNumber int64) ([]*Comment, error)
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GetPullRequests(start, limit int) ([]*PullRequest, error)
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}
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```
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```Go
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type DownloaderFactory interface {
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Match(opts MigrateOptions) (bool, error)
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New(opts MigrateOptions) (Downloader, error)
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}
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```
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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` on the local Gitea instance. Other uploaders are not supported
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and will be implemented in future.
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```Go
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// Uploader uploads all the informations
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type Uploader interface {
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CreateRepo(repo *Repository, includeWiki bool) error
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CreateMilestone(milestone *Milestone) error
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CreateRelease(release *Release) error
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CreateLabel(label *Label) error
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CreateIssue(issue *Issue) error
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CreateComment(issueNumber int64, comment *Comment) error
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CreatePullRequest(pr *PullRequest) error
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Rollback() error
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Close()
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}
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```
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