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

1 files changed, 18 insertions, 15 deletions

diff --git a/models/repo.go b/models/repo.go
index 936ad2ae37..e8af9aa2db 100644
--- a/models/repo.go
+++ b/models/repo.go
@@ -896,6 +896,7 @@ type MigrateRepoOptions struct {
 	IsPrivate   bool
 	IsMirror    bool
 	RemoteAddr  string
+	Wiki        bool // include wiki repository
 }
 
 /*
@@ -917,7 +918,7 @@ func wikiRemoteURL(remote string) string {
 	return ""
 }
 
-// MigrateRepository migrates a existing repository from other project hosting.
+// MigrateRepository migrates an existing repository from other project hosting.
 func MigrateRepository(doer, u *User, opts MigrateRepoOptions) (*Repository, error) {
 	repo, err := CreateRepository(doer, u, CreateRepoOptions{
 		Name:        opts.Name,
@@ -930,7 +931,6 @@ func MigrateRepository(doer, u *User, opts MigrateRepoOptions) (*Repository, err
 	}
 
 	repoPath := RepoPath(u.Name, opts.Name)
-	wikiPath := WikiPath(u.Name, opts.Name)
 
 	if u.IsOrganization() {
 		t, err := u.GetOwnerTeam()
@@ -956,22 +956,25 @@ func MigrateRepository(doer, u *User, opts MigrateRepoOptions) (*Repository, err
 		return repo, fmt.Errorf("Clone: %v", err)
 	}
 
-	wikiRemotePath := wikiRemoteURL(opts.RemoteAddr)
-	if len(wikiRemotePath) > 0 {
-		if err := os.RemoveAll(wikiPath); err != nil {
-			return repo, fmt.Errorf("Failed to remove %s: %v", wikiPath, err)
-		}
-
-		if err = git.Clone(wikiRemotePath, wikiPath, git.CloneRepoOptions{
-			Mirror:  true,
-			Quiet:   true,
-			Timeout: migrateTimeout,
-			Branch:  "master",
-		}); err != nil {
-			log.Warn("Clone wiki: %v", err)
+	if opts.Wiki {
+		wikiPath := WikiPath(u.Name, opts.Name)
+		wikiRemotePath := wikiRemoteURL(opts.RemoteAddr)
+		if len(wikiRemotePath) > 0 {
 			if err := os.RemoveAll(wikiPath); err != nil {
 				return repo, fmt.Errorf("Failed to remove %s: %v", wikiPath, err)
 			}
+
+			if err = git.Clone(wikiRemotePath, wikiPath, git.CloneRepoOptions{
+				Mirror:  true,
+				Quiet:   true,
+				Timeout: migrateTimeout,
+				Branch:  "master",
+			}); err != nil {
+				log.Warn("Clone wiki: %v", err)
+				if err := os.RemoveAll(wikiPath); err != nil {
+					return repo, fmt.Errorf("Failed to remove %s: %v", wikiPath, err)
+				}
+			}
 		}
 	}