Dump github/gitlab/gitea repository data to a local directory and restore to gitea (#12244)

* Dump github/gitlab repository data to a local directory

* Fix lint

* Adjust directory structure

* Allow migration special units

* Allow migration ignore release assets

* Fix lint

* Add restore repository

* stage the changes

* Merge

* Fix lint

* Update the interface

* Add some restore methods

* Finish restore

* Add comments

* Fix restore

* Add a token flag

* Fix bug

* Fix test

* Fix test

* Fix bug

* Fix bug

* Fix lint

* Fix restore

* refactor downloader

* fmt

* Fix bug isEnd detection on getIssues

* Refactor maxPerPage

* Remove unused codes

* Remove unused codes

* Fix bug

* Fix restore

* Fix dump

* Uploader should not depend downloader

* use release attachment name but not id

* Fix restore bug

* Fix lint

* Fix restore bug

* Add a method of DownloadFunc for base.Release to make uploader not depend on downloader

* fix Release yml marshal

* Fix trace information

* Fix bug when dump & restore

* Save relative path on yml file

* Fix bug

* Use relative path

* Update docs

* Use git service string but not int

* Recognize clone addr to service type

modules/migrations/base/pullrequest.go

@@ -13,11 +13,11 @@ import (
 // PullRequest defines a standard pull request information
 type PullRequest struct {
 	Number         int64
-	OriginalNumber int64
+	OriginalNumber int64 `yaml:"original_number"`
 	Title          string
-	PosterName     string
-	PosterID       int64
-	PosterEmail    string
+	PosterName     string `yaml:"poster_name"`
+	PosterID       int64  `yaml:"poster_id"`
+	PosterEmail    string `yaml:"poster_email"`
 	Content        string
 	Milestone      string
 	State          string
@@ -25,14 +25,14 @@ type PullRequest struct {
 	Updated        time.Time
 	Closed         *time.Time
 	Labels         []*Label
-	PatchURL       string
+	PatchURL       string `yaml:"patch_url"`
 	Merged         bool
-	MergedTime     *time.Time
-	MergeCommitSHA string
+	MergedTime     *time.Time `yaml:"merged_time"`
+	MergeCommitSHA string     `yaml:"merge_commit_sha"`
 	Head           PullRequestBranch
 	Base           PullRequestBranch
 	Assignees      []string
-	IsLocked       bool
+	IsLocked       bool `yaml:"is_locked"`
 	Reactions      []*Reaction
 }
 
@@ -43,11 +43,11 @@ func (p *PullRequest) IsForkPullRequest() bool {
 
 // PullRequestBranch represents a pull request branch
 type PullRequestBranch struct {
-	CloneURL  string
+	CloneURL  string `yaml:"clone_url"`
 	Ref       string
 	SHA       string
-	RepoName  string
-	OwnerName string
+	RepoName  string `yaml:"repo_name"`
+	OwnerName string `yaml:"owner_name"`
 }
 
 // RepoPath returns pull request repo path