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/repos_keys.go

@@ -0,0 +1,111 @@
+// Copyright 2013 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"
+)
+
+// The Key type is defined in users_keys.go
+
+// ListKeys lists the deploy keys for a repository.
+//
+// GitHub API docs: https://developer.github.com/v3/repos/keys/#list
+func (s *RepositoriesService) ListKeys(ctx context.Context, owner string, repo string, opt *ListOptions) ([]*Key, *Response, error) {
+	u := fmt.Sprintf("repos/%v/%v/keys", owner, repo)
+	u, err := addOptions(u, opt)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	req, err := s.client.NewRequest("GET", u, nil)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	var keys []*Key
+	resp, err := s.client.Do(ctx, req, &keys)
+	if err != nil {
+		return nil, resp, err
+	}
+
+	return keys, resp, nil
+}
+
+// GetKey fetches a single deploy key.
+//
+// GitHub API docs: https://developer.github.com/v3/repos/keys/#get
+func (s *RepositoriesService) GetKey(ctx context.Context, owner string, repo string, id int64) (*Key, *Response, error) {
+	u := fmt.Sprintf("repos/%v/%v/keys/%v", owner, repo, id)
+
+	req, err := s.client.NewRequest("GET", u, nil)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	key := new(Key)
+	resp, err := s.client.Do(ctx, req, key)
+	if err != nil {
+		return nil, resp, err
+	}
+
+	return key, resp, nil
+}
+
+// CreateKey adds a deploy key for a repository.
+//
+// GitHub API docs: https://developer.github.com/v3/repos/keys/#create
+func (s *RepositoriesService) CreateKey(ctx context.Context, owner string, repo string, key *Key) (*Key, *Response, error) {
+	u := fmt.Sprintf("repos/%v/%v/keys", owner, repo)
+
+	req, err := s.client.NewRequest("POST", u, key)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	k := new(Key)
+	resp, err := s.client.Do(ctx, req, k)
+	if err != nil {
+		return nil, resp, err
+	}
+
+	return k, resp, nil
+}
+
+// EditKey edits a deploy key.
+//
+// GitHub API docs: https://developer.github.com/v3/repos/keys/#edit
+func (s *RepositoriesService) EditKey(ctx context.Context, owner string, repo string, id int64, key *Key) (*Key, *Response, error) {
+	u := fmt.Sprintf("repos/%v/%v/keys/%v", owner, repo, id)
+
+	req, err := s.client.NewRequest("PATCH", u, key)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	k := new(Key)
+	resp, err := s.client.Do(ctx, req, k)
+	if err != nil {
+		return nil, resp, err
+	}
+
+	return k, resp, nil
+}
+
+// DeleteKey deletes a deploy key.
+//
+// GitHub API docs: https://developer.github.com/v3/repos/keys/#delete
+func (s *RepositoriesService) DeleteKey(ctx context.Context, owner string, repo string, id int64) (*Response, error) {
+	u := fmt.Sprintf("repos/%v/%v/keys/%v", owner, repo, id)
+
+	req, err := s.client.NewRequest("DELETE", u, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	return s.client.Do(ctx, req, nil)
+}