Sync branches to DB immediately when handle git hook calling (gitea#29493)

Unlike other async processing in the queue, we should sync branches to
the DB immediately when handling git hook calling. If it fails, users
can see the error message in the output of the git command.

It can avoid potential inconsistency issues, and help #29494.

---------

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

routers/private/hook_post_receive.go

@@ -8,9 +8,11 @@ import (
 	"net/http"
 	"strconv"
 
+	git_model "code.gitea.io/gitea/models/git"
 	issues_model "code.gitea.io/gitea/models/issues"
 	repo_model "code.gitea.io/gitea/models/repo"
 	"code.gitea.io/gitea/modules/git"
+	"code.gitea.io/gitea/modules/gitrepo"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/private"
 	repo_module "code.gitea.io/gitea/modules/repository"
@@ -27,6 +29,7 @@ func HookPostReceive(ctx *gitea_context.PrivateContext) {
 
 	// We don't rely on RepoAssignment here because:
 	// a) we don't need the git repo in this function
+	//    OUT OF DATE: we do need the git repo to sync the branch to the db now.
 	// b) our update function will likely change the repository in the db so we will need to refresh it
 	// c) we don't always need the repo
 
@@ -34,7 +37,11 @@ func HookPostReceive(ctx *gitea_context.PrivateContext) {
 	repoName := ctx.Params(":repo")
 
 	// defer getting the repository at this point - as we should only retrieve it if we're going to call update
-	var repo *repo_model.Repository
+	var (
+		repo    *repo_model.Repository
+		gitRepo *git.Repository
+	)
+	defer gitRepo.Close() // it's safe to call Close on a nil pointer
 
 	updates := make([]*repo_module.PushUpdateOptions, 0, len(opts.OldCommitIDs))
 	wasEmpty := false
@@ -87,6 +94,63 @@ func HookPostReceive(ctx *gitea_context.PrivateContext) {
 			})
 			return
 		}
+
+		branchesToSync := make([]*repo_module.PushUpdateOptions, 0, len(updates))
+		for _, update := range updates {
+			if !update.RefFullName.IsBranch() {
+				continue
+			}
+			if repo == nil {
+				repo = loadRepository(ctx, ownerName, repoName)
+				if ctx.Written() {
+					return
+				}
+				wasEmpty = repo.IsEmpty
+			}
+
+			if update.IsDelRef() {
+				if err := git_model.AddDeletedBranch(ctx, repo.ID, update.RefFullName.BranchName(), update.PusherID); err != nil {
+					log.Error("Failed to add deleted branch: %s/%s Error: %v", ownerName, repoName, err)
+					ctx.JSON(http.StatusInternalServerError, private.HookPostReceiveResult{
+						Err: fmt.Sprintf("Failed to add deleted branch: %s/%s Error: %v", ownerName, repoName, err),
+					})
+					return
+				}
+			} else {
+				branchesToSync = append(branchesToSync, update)
+			}
+		}
+		if len(branchesToSync) > 0 {
+			if gitRepo == nil {
+				var err error
+				gitRepo, err = gitrepo.OpenRepository(ctx, repo)
+				if err != nil {
+					log.Error("Failed to open repository: %s/%s Error: %v", ownerName, repoName, err)
+					ctx.JSON(http.StatusInternalServerError, private.HookPostReceiveResult{
+						Err: fmt.Sprintf("Failed to open repository: %s/%s Error: %v", ownerName, repoName, err),
+					})
+					return
+				}
+			}
+
+			var (
+				branchNames = make([]string, 0, len(branchesToSync))
+				commitIDs   = make([]string, 0, len(branchesToSync))
+			)
+			for _, update := range branchesToSync {
+				branchNames = append(branchNames, update.RefFullName.BranchName())
+				commitIDs = append(commitIDs, update.NewCommitID)
+			}
+
+			if err := repo_service.SyncBranchesToDB(ctx, repo.ID, opts.UserID, branchNames, commitIDs, func(commitID string) (*git.Commit, error) {
+				return gitRepo.GetCommit(commitID)
+			}); err != nil {
+				ctx.JSON(http.StatusInternalServerError, private.HookPostReceiveResult{
+					Err: fmt.Sprintf("Failed to sync branch to DB in repository: %s/%s Error: %v", ownerName, repoName, err),
+				})
+				return
+			}
+		}
 	}
 
 	// Handle Push Options