Sync branches into databases (#22743)

Related #14180
Related #25233 
Related #22639
Close #19786
Related #12763 

This PR will change all the branches retrieve method from reading git
data to read database to reduce git read operations.

- [x] Sync git branches information into database when push git data
- [x] Create a new table `Branch`, merge some columns of `DeletedBranch`
into `Branch` table and drop the table `DeletedBranch`.
- [x] Read `Branch` table when visit `code` -> `branch` page
- [x] Read `Branch` table when list branch names in `code` page dropdown
- [x] Read `Branch` table when list git ref compare page
- [x] Provide a button in admin page to manually sync all branches.
- [x] Sync branches if repository is not empty but database branches are
empty when visiting pages with branches list
- [x] Use `commit_time desc` as the default FindBranch order by to keep
consistent as before and deleted branches will be always at the end.

---------

Co-authored-by: Jason Song <i@wolfogre.com>

3 files changed, 5 insertions, 6 deletions

diff --git a/services/pull/pull.go b/services/pull/pull.go
index f44e690ab7..0f562b9ee3 100644
--- a/services/pull/pull.go
+++ b/services/pull/pull.go
@@ -170,7 +170,7 @@ func ChangeTargetBranch(ctx context.Context, pr *issues_model.PullRequest, doer
 		return err
 	}
 	if branchesEqual {
-		return models.ErrBranchesEqual{
+		return git_model.ErrBranchesEqual{
 			HeadBranchName: pr.HeadBranch,
 			BaseBranchName: targetBranch,
 		}
@@ -338,7 +338,7 @@ func AddTestPullRequestTask(doer *user_model.User, repoID int64, branch string,
 		for _, pr := range prs {
 			divergence, err := GetDiverging(ctx, pr)
 			if err != nil {
-				if models.IsErrBranchDoesNotExist(err) && !git.IsBranchExist(ctx, pr.HeadRepo.RepoPath(), pr.HeadBranch) {
+				if git_model.IsErrBranchNotExist(err) && !git.IsBranchExist(ctx, pr.HeadRepo.RepoPath(), pr.HeadBranch) {
 					log.Warn("Cannot test PR %s/%d: head_branch %s no longer exists", pr.BaseRepo.Name, pr.IssueID, pr.HeadBranch)
 				} else {
 					log.Error("GetDiverging: %v", err)
diff --git a/services/pull/temp_repo.go b/services/pull/temp_repo.go
index 1464707806..db32940e38 100644
--- a/services/pull/temp_repo.go
+++ b/services/pull/temp_repo.go
@@ -11,7 +11,7 @@ import (
 	"path/filepath"
 	"strings"
 
-	"code.gitea.io/gitea/models"
+	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"
@@ -181,7 +181,7 @@ func createTemporaryRepoForPR(ctx context.Context, pr *issues_model.PullRequest)
 		Run(prCtx.RunOpts()); err != nil {
 		cancel()
 		if !git.IsBranchExist(ctx, pr.HeadRepo.RepoPath(), pr.HeadBranch) {
-			return nil, nil, models.ErrBranchDoesNotExist{
+			return nil, nil, git_model.ErrBranchNotExist{
 				BranchName: pr.HeadBranch,
 			}
 		}
diff --git a/services/pull/update.go b/services/pull/update.go
index b977dbdba9..bc8c4a25e5 100644
--- a/services/pull/update.go
+++ b/services/pull/update.go
@@ -7,7 +7,6 @@ import (
 	"context"
 	"fmt"
 
-	"code.gitea.io/gitea/models"
 	git_model "code.gitea.io/gitea/models/git"
 	issues_model "code.gitea.io/gitea/models/issues"
 	access_model "code.gitea.io/gitea/models/perm/access"
@@ -168,7 +167,7 @@ func GetDiverging(ctx context.Context, pr *issues_model.PullRequest) (*git.Diver
 	log.Trace("GetDiverging[%-v]: compare commits", pr)
 	prCtx, cancel, err := createTemporaryRepoForPR(ctx, pr)
 	if err != nil {
-		if !models.IsErrBranchDoesNotExist(err) {
+		if !git_model.IsErrBranchNotExist(err) {
 			log.Error("CreateTemporaryRepoForPR %-v: %v", pr, err)
 		}
 		return nil, err