Improve migrations to support migrating milestones/labels/issues/comments/pullrequests (#6290)

* add migrations

* fix package dependency

* fix lints

* implements migrations except pull requests

* add releases

* migrating releases

* fix bug

* fix lint

* fix migrate releases

* fix tests

* add rollback

* pull request migtations

* fix import

* fix go module vendor

* add tests for upload to gitea

* more migrate options

* fix swagger-check

* fix misspell

* add options on migration UI

* fix log error

* improve UI options on migrating

* add support for username password when migrating from github

* fix tests

* remove comments and fix migrate limitation

* improve error handles

* migrate API will also support migrate milestones/labels/issues/pulls/releases

* fix tests and remove unused codes

* add DownloaderFactory and docs about how to create a new Downloader

* fix misspell

* fix migration docs

* Add hints about migrate options on migration page

* fix tests

vendor/github.com/google/go-github/v24/github/interactions_repos.go

@@ -0,0 +1,80 @@
+// Copyright 2018 The go-github AUTHORS. All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package github
+
+import (
+	"context"
+	"fmt"
+)
+
+// GetRestrictionsForRepo fetches the interaction restrictions for a repository.
+//
+// GitHub API docs: https://developer.github.com/v3/interactions/repos/#get-interaction-restrictions-for-a-repository
+func (s *InteractionsService) GetRestrictionsForRepo(ctx context.Context, owner, repo string) (*InteractionRestriction, *Response, error) {
+	u := fmt.Sprintf("repos/%v/%v/interaction-limits", owner, repo)
+	req, err := s.client.NewRequest("GET", u, nil)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	// TODO: remove custom Accept header when this API fully launches.
+	req.Header.Set("Accept", mediaTypeInteractionRestrictionsPreview)
+
+	repositoryInteractions := new(InteractionRestriction)
+
+	resp, err := s.client.Do(ctx, req, repositoryInteractions)
+	if err != nil {
+		return nil, resp, err
+	}
+
+	return repositoryInteractions, resp, nil
+}
+
+// UpdateRestrictionsForRepo adds or updates the interaction restrictions for a repository.
+//
+// limit specifies the group of GitHub users who can comment, open issues, or create pull requests
+// for the given repository.
+// Possible values are: "existing_users", "contributors_only", "collaborators_only".
+//
+// GitHub API docs: https://developer.github.com/v3/interactions/repos/#add-or-update-interaction-restrictions-for-a-repository
+func (s *InteractionsService) UpdateRestrictionsForRepo(ctx context.Context, owner, repo, limit string) (*InteractionRestriction, *Response, error) {
+	u := fmt.Sprintf("repos/%v/%v/interaction-limits", owner, repo)
+
+	interaction := &InteractionRestriction{Limit: String(limit)}
+
+	req, err := s.client.NewRequest("PUT", u, interaction)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	// TODO: remove custom Accept header when this API fully launches.
+	req.Header.Set("Accept", mediaTypeInteractionRestrictionsPreview)
+
+	repositoryInteractions := new(InteractionRestriction)
+
+	resp, err := s.client.Do(ctx, req, repositoryInteractions)
+	if err != nil {
+		return nil, resp, err
+	}
+
+	return repositoryInteractions, resp, nil
+}
+
+// RemoveRestrictionsFromRepo removes the interaction restrictions for a repository.
+//
+// GitHub API docs: https://developer.github.com/v3/interactions/repos/#remove-interaction-restrictions-for-a-repository
+func (s *InteractionsService) RemoveRestrictionsFromRepo(ctx context.Context, owner, repo string) (*Response, error) {
+	u := fmt.Sprintf("repos/%v/%v/interaction-limits", owner, repo)
+	req, err := s.client.NewRequest("DELETE", u, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	// TODO: remove custom Accept header when this API fully launches.
+	req.Header.Set("Accept", mediaTypeInteractionRestrictionsPreview)
+
+	return s.client.Do(ctx, req, nil)
+}