Allow detect whether it's in a database transaction for a context.Context (#21756)

Fix #19513

This PR introduce a new db method `InTransaction(context.Context)`,
and also builtin check on `db.TxContext` and `db.WithTx`.
There is also a new method `db.AutoTx` has been introduced but could be used by other PRs.

`WithTx` will always open a new transaction, if a transaction exist in context, return an error.
`AutoTx` will try to open a new transaction if no transaction exist in context.
That means it will always enter a transaction if there is no error.

Co-authored-by: delvh <dev.lh@web.de>
Co-authored-by: 6543 <6543@obermui.de>

models/repo/collaboration.go

@@ -138,7 +138,7 @@ func ChangeCollaborationAccessModeCtx(ctx context.Context, repo *Repository, uid
 
 // ChangeCollaborationAccessMode sets new access mode for the collaboration.
 func ChangeCollaborationAccessMode(repo *Repository, uid int64, mode perm.AccessMode) error {
-	ctx, committer, err := db.TxContext()
+	ctx, committer, err := db.TxContext(db.DefaultContext)
 	if err != nil {
 		return err
 	}

models/repo/language_stats.go

@@ -110,7 +110,7 @@ func GetTopLanguageStats(repo *Repository, limit int) (LanguageStatList, error)
 
 // UpdateLanguageStats updates the language statistics for repository
 func UpdateLanguageStats(repo *Repository, commitID string, stats map[string]int64) error {
-	ctx, committer, err := db.TxContext()
+	ctx, committer, err := db.TxContext(db.DefaultContext)
 	if err != nil {
 		return err
 	}
@@ -182,7 +182,7 @@ func UpdateLanguageStats(repo *Repository, commitID string, stats map[string]int
 
 // CopyLanguageStat Copy originalRepo language stat information to destRepo (use for forked repo)
 func CopyLanguageStat(originalRepo, destRepo *Repository) error {
-	ctx, committer, err := db.TxContext()
+	ctx, committer, err := db.TxContext(db.DefaultContext)
 	if err != nil {
 		return err
 	}

models/repo/repo_unit.go

@@ -241,7 +241,7 @@ func UpdateRepoUnit(unit *RepoUnit) error {
 
 // UpdateRepositoryUnits updates a repository's units
 func UpdateRepositoryUnits(repo *Repository, units []RepoUnit, deleteUnitTypes []unit.Type) (err error) {
-	ctx, committer, err := db.TxContext()
+	ctx, committer, err := db.TxContext(db.DefaultContext)
 	if err != nil {
 		return err
 	}

models/repo/star.go

@@ -26,7 +26,7 @@ func init() {
 
 // StarRepo or unstar repository.
 func StarRepo(userID, repoID int64, star bool) error {
-	ctx, committer, err := db.TxContext()
+	ctx, committer, err := db.TxContext(db.DefaultContext)
 	if err != nil {
 		return err
 	}

models/repo/topic.go

@@ -231,7 +231,7 @@ func GetRepoTopicByName(ctx context.Context, repoID int64, topicName string) (*T
 
 // AddTopic adds a topic name to a repository (if it does not already have it)
 func AddTopic(repoID int64, topicName string) (*Topic, error) {
-	ctx, committer, err := db.TxContext()
+	ctx, committer, err := db.TxContext(db.DefaultContext)
 	if err != nil {
 		return nil, err
 	}
@@ -293,7 +293,7 @@ func SaveTopics(repoID int64, topicNames ...string) error {
 		return err
 	}
 
-	ctx, committer, err := db.TxContext()
+	ctx, committer, err := db.TxContext(db.DefaultContext)
 	if err != nil {
 		return err
 	}

models/repo/update.go

@@ -21,7 +21,7 @@ func UpdateRepositoryOwnerNames(ownerID int64, ownerName string) error {
 	if ownerID == 0 {
 		return nil
 	}
-	ctx, committer, err := db.TxContext()
+	ctx, committer, err := db.TxContext(db.DefaultContext)
 	if err != nil {
 		return err
 	}
@@ -172,7 +172,7 @@ func ChangeRepositoryName(doer *user_model.User, repo *Repository, newRepoName s
 		}
 	}
 
-	ctx, committer, err := db.TxContext()
+	ctx, committer, err := db.TxContext(db.DefaultContext)
 	if err != nil {
 		return err
 	}

models/repo/upload.go

@@ -121,7 +121,7 @@ func DeleteUploads(uploads ...*Upload) (err error) {
 		return nil
 	}
 
-	ctx, committer, err := db.TxContext()
+	ctx, committer, err := db.TxContext(db.DefaultContext)
 	if err != nil {
 		return err
 	}