Split migrations folder (#21549)

There are too many files in `models/migrations` folder so that I split
them into sub folders.

models/migrations/v1_9/v82.go

@@ -0,0 +1,134 @@
+// Copyright 2019 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package v1_9 // nolint
+
+import (
+	"fmt"
+	"path/filepath"
+	"strings"
+
+	"code.gitea.io/gitea/modules/git"
+	"code.gitea.io/gitea/modules/setting"
+
+	"xorm.io/xorm"
+)
+
+func FixReleaseSha1OnReleaseTable(x *xorm.Engine) error {
+	type Release struct {
+		ID      int64
+		RepoID  int64
+		Sha1    string
+		TagName string
+	}
+
+	type Repository struct {
+		ID      int64
+		OwnerID int64
+		Name    string
+	}
+
+	type User struct {
+		ID   int64
+		Name string
+	}
+
+	// UserPath returns the path absolute path of user repositories.
+	UserPath := func(userName string) string {
+		return filepath.Join(setting.RepoRootPath, strings.ToLower(userName))
+	}
+
+	// RepoPath returns repository path by given user and repository name.
+	RepoPath := func(userName, repoName string) string {
+		return filepath.Join(UserPath(userName), strings.ToLower(repoName)+".git")
+	}
+
+	// Update release sha1
+	const batchSize = 100
+	sess := x.NewSession()
+	defer sess.Close()
+
+	var (
+		err          error
+		count        int
+		gitRepoCache = make(map[int64]*git.Repository)
+		repoCache    = make(map[int64]*Repository)
+		userCache    = make(map[int64]*User)
+	)
+
+	if err = sess.Begin(); err != nil {
+		return err
+	}
+
+	for start := 0; ; start += batchSize {
+		releases := make([]*Release, 0, batchSize)
+		if err = sess.Limit(batchSize, start).Asc("id").Where("is_tag=?", false).Find(&releases); err != nil {
+			return err
+		}
+		if len(releases) == 0 {
+			break
+		}
+
+		for _, release := range releases {
+			gitRepo, ok := gitRepoCache[release.RepoID]
+			if !ok {
+				repo, ok := repoCache[release.RepoID]
+				if !ok {
+					repo = new(Repository)
+					has, err := sess.ID(release.RepoID).Get(repo)
+					if err != nil {
+						return err
+					} else if !has {
+						return fmt.Errorf("Repository %d is not exist", release.RepoID)
+					}
+
+					repoCache[release.RepoID] = repo
+				}
+
+				user, ok := userCache[repo.OwnerID]
+				if !ok {
+					user = new(User)
+					has, err := sess.ID(repo.OwnerID).Get(user)
+					if err != nil {
+						return err
+					} else if !has {
+						return fmt.Errorf("User %d is not exist", repo.OwnerID)
+					}
+
+					userCache[repo.OwnerID] = user
+				}
+
+				gitRepo, err = git.OpenRepository(git.DefaultContext, RepoPath(user.Name, repo.Name))
+				if err != nil {
+					return err
+				}
+				defer gitRepo.Close()
+				gitRepoCache[release.RepoID] = gitRepo
+			}
+
+			release.Sha1, err = gitRepo.GetTagCommitID(release.TagName)
+			if err != nil && !git.IsErrNotExist(err) {
+				return err
+			}
+
+			if err == nil {
+				if _, err = sess.ID(release.ID).Cols("sha1").Update(release); err != nil {
+					return err
+				}
+			}
+
+			count++
+			if count >= 1000 {
+				if err = sess.Commit(); err != nil {
+					return err
+				}
+				if err = sess.Begin(); err != nil {
+					return err
+				}
+				count = 0
+			}
+		}
+	}
+	return sess.Commit()
+}