Fix migration order v1.3 (#3157)

* FIx migration order

* Fix migration function file names to match version

* Fix typo

* Add note about ignored errors

* Fix typo, remove wrong comment

models/migrations/v40.go

@@ -6,50 +6,52 @@ package migrations
 
 import (
 	"fmt"
-	"time"
 
+	"code.gitea.io/git"
+	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/log"
-	"code.gitea.io/gitea/modules/setting"
 
 	"github.com/go-xorm/xorm"
 )
 
-func migrateProtectedBranchStruct(x *xorm.Engine) error {
-	type ProtectedBranch struct {
-		ID          int64  `xorm:"pk autoincr"`
-		RepoID      int64  `xorm:"UNIQUE(s)"`
-		BranchName  string `xorm:"UNIQUE(s)"`
-		CanPush     bool
-		Created     time.Time `xorm:"-"`
-		CreatedUnix int64
-		Updated     time.Time `xorm:"-"`
-		UpdatedUnix int64
+// ReleaseV39 describes the added field for Release
+type ReleaseV39 struct {
+	IsTag bool `xorm:"NOT NULL DEFAULT false"`
+}
+
+// TableName will be invoked by XORM to customrize the table name
+func (*ReleaseV39) TableName() string {
+	return "release"
+}
+
+func releaseAddColumnIsTagAndSyncTags(x *xorm.Engine) error {
+	if err := x.Sync2(new(ReleaseV39)); err != nil {
+		return fmt.Errorf("Sync2: %v", err)
 	}
 
-	var pbs []ProtectedBranch
-	err := x.Find(&pbs)
-	if err != nil {
-		return err
-	}
+	// For the sake of SQLite3, we can't use x.Iterate here.
+	offset := 0
+	pageSize := 20
+	for {
+		repos := make([]*models.Repository, 0, pageSize)
+		if err := x.Table("repository").Asc("id").Limit(pageSize, offset).Find(&repos); err != nil {
+			return fmt.Errorf("select repos [offset: %d]: %v", offset, err)
+		}
+		for _, repo := range repos {
+			gitRepo, err := git.OpenRepository(repo.RepoPath())
+			if err != nil {
+				log.Warn("OpenRepository: %v", err)
+				continue
+			}
 
-	for _, pb := range pbs {
-		if pb.CanPush {
-			if _, err = x.ID(pb.ID).Delete(new(ProtectedBranch)); err != nil {
-				return err
+			if err = models.SyncReleasesWithTags(repo, gitRepo); err != nil {
+				log.Warn("SyncReleasesWithTags: %v", err)
 			}
 		}
-	}
-
-	switch {
-	case setting.UseSQLite3:
-		log.Warn("Unable to drop columns in SQLite")
-	case setting.UseMySQL, setting.UsePostgreSQL, setting.UseMSSQL, setting.UseTiDB:
-		if _, err := x.Exec("ALTER TABLE protected_branch DROP COLUMN can_push"); err != nil {
-			return fmt.Errorf("DROP COLUMN can_push: %v", err)
+		if len(repos) < pageSize {
+			break
 		}
-	default:
-		log.Fatal(4, "Unrecognized DB")
+		offset += pageSize
 	}
-
 	return nil
 }