gitea/docs/content/doc/advanced/migrations.en-us.md

date	title	slug	weight	toc	draft	menu
2019-04-15T17:29:00+08:00	Advanced: Migrations Interfaces	migrations-interfaces	30	true	false	sidebar parent name weight identifier advanced Migrations Interfaces 55 migrations-interfaces

Migration Features

The new migration features were introduced in Gitea 1.9.0. It defines two interfaces to support migrating
repositories data from other git host platforms to gitea or, in the future migrating gitea data to other
git host platforms. Currently, only the migrations from github via APIv3 to Gitea is implemented.

First of all, Gitea defines some standard objects in packages modules/migrations/base. They are
Repository, Milestone, Release, Label, Issue, Comment, PullRequest.

Downloader Interfaces

To migrate from a new git host platform, there are two steps to be updated.

• You should implement a Downloader which will get all kinds of repository informations.
• You should implement a DownloaderFactory which is used to detect if the URL matches and
  create a Downloader.
• You'll need to register the DownloaderFactory via RegisterDownloaderFactory on init.

type Downloader interface {
	GetRepoInfo() (*Repository, error)
	GetTopics() ([]string, error)
	GetMilestones() ([]*Milestone, error)
	GetReleases() ([]*Release, error)
	GetLabels() ([]*Label, error)
	GetIssues(start, limit int) ([]*Issue, error)
	GetComments(issueNumber int64) ([]*Comment, error)
	GetPullRequests(start, limit int) ([]*PullRequest, error)
}

type DownloaderFactory interface {
	Match(opts MigrateOptions) (bool, error)
	New(opts MigrateOptions) (Downloader, error)
}

Uploader Interface

Currently, only a GiteaLocalUploader is implemented, so we only save downloaded
data via this Uploader on the local Gitea instance. Other uploaders are not supported
and will be implemented in future.

// Uploader uploads all the informations
type Uploader interface {
	CreateRepo(repo *Repository, includeWiki bool) error
	CreateMilestone(milestone *Milestone) error
	CreateRelease(release *Release) error
	CreateLabel(label *Label) error
	CreateIssue(issue *Issue) error
	CreateComment(issueNumber int64, comment *Comment) error
	CreatePullRequest(pr *PullRequest) error
	Rollback() error
}