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preserve users if restoring a repository on the same Gitea instance (g…
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…o-gitea#18604)

When calling DumpRepository and RestoreRepository on the same Gitea
instance, the users are preserved: all labels, issues etc. belong to
the external user who is, in this particular case, the local user.

Dead code verifying g.gitServiceType.Name() == "" (i.e. plain git) is
removed. The function is never called because the plain git downloader
does not migrate anything that is associated to a user, by definition.

Errors returned by GetUserIDByExternalUserID are no longer ignored.

The userMap is used when the external user is not kown, which is the
most common case. It was only used when the external user exists
which happens less often and, as a result, every occurence of an
unknown external user required a SQL query.

Signed-off-by: Loïc Dachary <[email protected]>

Co-authored-by: Loïc Dachary <[email protected]>
Co-authored-by: Lunny Xiao <[email protected]>
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@singuliere @lunny
3 people authored and Stelios Malathouras committed Mar 28, 2022
1 parent b5fc96a commit d80cd2e
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Showing 4 changed files with 125 additions and 26 deletions.
1 change: 1 addition & 0 deletions integrations/dump_restore_test.go
View file
Original file line number Diff line number Diff line change
Expand Up @@ -129,6 +129,7 @@ func TestDumpRestore(t *testing.T) {
assert.EqualValues(t, before[i].Created, after[i].Created)
assert.EqualValues(t, before[i].Updated, after[i].Updated)
assert.EqualValues(t, before[i].Labels, after[i].Labels)
assert.EqualValues(t, before[i].Reactions, after[i].Reactions)
}
}
})
Expand Down
13 changes: 13 additions & 0 deletions models/user/user.go
View file
Original file line number Diff line number Diff line change
Expand Up @@ -1025,6 +1025,19 @@ func GetUserNamesByIDs(ids []int64) ([]string, error) {
return unames, err
}

// GetUserNameByID returns username for the id
func GetUserNameByID(ctx context.Context, id int64) (string, error) {
var name string
has, err := db.GetEngine(db.DefaultContext).Table("user").Where("id = ?", id).Cols("name").Get(&name)
if err != nil {
return "", err
}
if has {
return name, nil
}
return "", nil
}

// GetUserIDsByNames returns a slice of ids corresponds to names.
func GetUserIDsByNames(names []string, ignoreNonExistent bool) ([]int64, error) {
ids := make([]int64, 0, len(names))
Expand Down
75 changes: 53 additions & 22 deletions services/migrations/gitea_uploader.go
View file
Original file line number Diff line number Diff line change
Expand Up @@ -46,6 +46,7 @@ type GiteaLocalUploader struct {
issues map[int64]*models.Issue
gitRepo *git.Repository
prHeadCache map[string]struct{}
sameApp bool
userMap map[int64]int64 // external user id mapping to user id
prCache map[int64]*models.PullRequest
gitServiceType structs.GitServiceType
Expand Down Expand Up @@ -128,6 +129,7 @@ func (g *GiteaLocalUploader) CreateRepo(repo *base.Repository, opts base.Migrate
MirrorInterval: opts.MirrorInterval,
}, NewMigrationHTTPTransport())

g.sameApp = strings.HasPrefix(repo.OriginalURL, setting.AppURL)
g.repo = r
if err != nil {
return err
Expand Down Expand Up @@ -256,7 +258,7 @@ func (g *GiteaLocalUploader) CreateReleases(releases ...*base.Release) error {
CreatedUnix: timeutil.TimeStamp(release.Created.Unix()),
}

if err := g.remapExternalUser(release, &rel); err != nil {
if err := g.remapUser(release, &rel); err != nil {
return err
}

Expand Down Expand Up @@ -373,7 +375,7 @@ func (g *GiteaLocalUploader) CreateIssues(issues ...*base.Issue) error {
UpdatedUnix: timeutil.TimeStamp(issue.Updated.Unix()),
}

if err := g.remapExternalUser(issue, &is); err != nil {
if err := g.remapUser(issue, &is); err != nil {
return err
}

Expand All @@ -386,7 +388,7 @@ func (g *GiteaLocalUploader) CreateIssues(issues ...*base.Issue) error {
Type: reaction.Content,
CreatedUnix: timeutil.TimeStampNow(),
}
if err := g.remapExternalUser(reaction, &res); err != nil {
if err := g.remapUser(reaction, &res); err != nil {
return err
}
is.Reactions = append(is.Reactions, &res)
Expand Down Expand Up @@ -437,7 +439,7 @@ func (g *GiteaLocalUploader) CreateComments(comments ...*base.Comment) error {
UpdatedUnix: timeutil.TimeStamp(comment.Updated.Unix()),
}

if err := g.remapExternalUser(comment, &cm); err != nil {
if err := g.remapUser(comment, &cm); err != nil {
return err
}

Expand All @@ -447,7 +449,7 @@ func (g *GiteaLocalUploader) CreateComments(comments ...*base.Comment) error {
Type: reaction.Content,
CreatedUnix: timeutil.TimeStampNow(),
}
if err := g.remapExternalUser(reaction, &res); err != nil {
if err := g.remapUser(reaction, &res); err != nil {
return err
}
cm.Reactions = append(cm.Reactions, &res)
Expand All @@ -471,7 +473,7 @@ func (g *GiteaLocalUploader) CreatePullRequests(prs ...*base.PullRequest) error
return err
}

if err := g.remapExternalUser(pr, gpr.Issue); err != nil {
if err := g.remapUser(pr, gpr.Issue); err != nil {
return err
}

Expand Down Expand Up @@ -626,7 +628,7 @@ func (g *GiteaLocalUploader) newPullRequest(pr *base.PullRequest) (*models.PullR
UpdatedUnix: timeutil.TimeStamp(pr.Updated.Unix()),
}

if err := g.remapExternalUser(pr, &issue); err != nil {
if err := g.remapUser(pr, &issue); err != nil {
return nil, err
}

Expand All @@ -636,7 +638,7 @@ func (g *GiteaLocalUploader) newPullRequest(pr *base.PullRequest) (*models.PullR
Type: reaction.Content,
CreatedUnix: timeutil.TimeStampNow(),
}
if err := g.remapExternalUser(reaction, &res); err != nil {
if err := g.remapUser(reaction, &res); err != nil {
return nil, err
}
issue.Reactions = append(issue.Reactions, &res)
Expand Down Expand Up @@ -710,7 +712,7 @@ func (g *GiteaLocalUploader) CreateReviews(reviews ...*base.Review) error {
UpdatedUnix: timeutil.TimeStamp(review.CreatedAt.Unix()),
}

if err := g.remapExternalUser(review, &cm); err != nil {
if err := g.remapUser(review, &cm); err != nil {
return err
}

Expand Down Expand Up @@ -773,7 +775,7 @@ func (g *GiteaLocalUploader) CreateReviews(reviews ...*base.Review) error {
UpdatedUnix: timeutil.TimeStamp(comment.UpdatedAt.Unix()),
}

if err := g.remapExternalUser(review, &c); err != nil {
if err := g.remapUser(review, &c); err != nil {
return err
}

Expand Down Expand Up @@ -816,23 +818,52 @@ func (g *GiteaLocalUploader) Finish() error {
return repo_model.UpdateRepositoryCols(g.repo, "status")
}

func (g *GiteaLocalUploader) remapExternalUser(source user_model.ExternalUserMigrated, target user_model.ExternalUserRemappable) (err error) {
func (g *GiteaLocalUploader) remapUser(source user_model.ExternalUserMigrated, target user_model.ExternalUserRemappable) error {
var userid int64
var err error
if g.sameApp {
userid, err = g.remapLocalUser(source, target)
} else {
userid, err = g.remapExternalUser(source, target)
}

if err != nil {
return err
}

if userid > 0 {
return target.RemapExternalUser("", 0, userid)
}
return target.RemapExternalUser(source.GetExternalName(), source.GetExternalID(), g.doer.ID)
}

func (g *GiteaLocalUploader) remapLocalUser(source user_model.ExternalUserMigrated, target user_model.ExternalUserRemappable) (int64, error) {
userid, ok := g.userMap[source.GetExternalID()]
tp := g.gitServiceType.Name()
if !ok && tp != "" {
userid, err = user_model.GetUserIDByExternalUserID(tp, fmt.Sprintf("%d", source.GetExternalID()))
if !ok {
name, err := user_model.GetUserNameByID(g.ctx, source.GetExternalID())
if err != nil {
log.Error("GetUserIDByExternalUserID: %v", err)
return 0, err
}
if userid > 0 {
g.userMap[source.GetExternalID()] = userid
// let's not reuse an ID when the user was deleted or has a different user name
if name != source.GetExternalName() {
userid = 0
} else {
userid = source.GetExternalID()
}
g.userMap[source.GetExternalID()] = userid
}
return userid, nil
}

if userid > 0 {
err = target.RemapExternalUser("", 0, userid)
} else {
err = target.RemapExternalUser(source.GetExternalName(), source.GetExternalID(), g.doer.ID)
func (g *GiteaLocalUploader) remapExternalUser(source user_model.ExternalUserMigrated, target user_model.ExternalUserRemappable) (userid int64, err error) {
userid, ok := g.userMap[source.GetExternalID()]
if !ok {
userid, err = user_model.GetUserIDByExternalUserID(g.gitServiceType.Name(), fmt.Sprintf("%d", source.GetExternalID()))
if err != nil {
log.Error("GetUserIDByExternalUserID: %v", err)
return 0, err
}
g.userMap[source.GetExternalID()] = userid
}
return
return userid, nil
}
62 changes: 58 additions & 4 deletions services/migrations/gitea_uploader_test.go
View file
Original file line number Diff line number Diff line change
Expand Up @@ -117,16 +117,68 @@ func TestGiteaUploadRepo(t *testing.T) {
assert.Len(t, pulls[0].Issue.Comments, 2)
}

func TestGiteaUploadRemapLocalUser(t *testing.T) {
unittest.PrepareTestEnv(t)
doer := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 1}).(*user_model.User)
user := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 2}).(*user_model.User)

repoName := "migrated"
uploader := NewGiteaLocalUploader(context.Background(), doer, doer.Name, repoName)
// call remapLocalUser
uploader.sameApp = true

externalID := int64(1234567)
externalName := "username"
source := base.Release{
PublisherID: externalID,
PublisherName: externalName,
}

//
// The externalID does not match any existing user, everything
// belongs to the doer
//
target := models.Release{}
uploader.userMap = make(map[int64]int64)
err := uploader.remapUser(&source, &target)
assert.NoError(t, err)
assert.EqualValues(t, doer.ID, target.GetUserID())

//
// The externalID matches a known user but the name does not match,
// everything belongs to the doer
//
source.PublisherID = user.ID
target = models.Release{}
uploader.userMap = make(map[int64]int64)
err = uploader.remapUser(&source, &target)
assert.NoError(t, err)
assert.EqualValues(t, doer.ID, target.GetUserID())

//
// The externalID and externalName match an existing user, everything
// belongs to the existing user
//
source.PublisherName = user.Name
target = models.Release{}
uploader.userMap = make(map[int64]int64)
err = uploader.remapUser(&source, &target)
assert.NoError(t, err)
assert.EqualValues(t, user.ID, target.GetUserID())
}

func TestGiteaUploadRemapExternalUser(t *testing.T) {
unittest.PrepareTestEnv(t)
doer := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 1}).(*user_model.User)

repoName := "migrated"
uploader := NewGiteaLocalUploader(context.Background(), doer, doer.Name, repoName)
uploader.gitServiceType = structs.GiteaService
// call remapExternalUser
uploader.sameApp = false

externalID := int64(1234567)
externalName := "url.or.something"
externalName := "username"
source := base.Release{
PublisherID: externalID,
PublisherName: externalName,
Expand All @@ -136,8 +188,9 @@ func TestGiteaUploadRemapExternalUser(t *testing.T) {
// When there is no user linked to the external ID, the migrated data is authored
// by the doer
//
uploader.userMap = make(map[int64]int64)
target := models.Release{}
err := uploader.remapExternalUser(&source, &target)
err := uploader.remapUser(&source, &target)
assert.NoError(t, err)
assert.EqualValues(t, doer.ID, target.GetUserID())

Expand All @@ -158,8 +211,9 @@ func TestGiteaUploadRemapExternalUser(t *testing.T) {
// When a user is linked to the external ID, it becomes the author of
// the migrated data
//
uploader.userMap = make(map[int64]int64)
target = models.Release{}
err = uploader.remapExternalUser(&source, &target)
err = uploader.remapUser(&source, &target)
assert.NoError(t, err)
assert.EqualValues(t, target.GetUserID(), linkedUser.ID)
assert.EqualValues(t, linkedUser.ID, target.GetUserID())
}

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