Some refactor for repo path (#36251)

- Use `gitrepo.IsRepositoryExist` instead of `util.IsExit` or
`util.IsDir`
- Use `gitrepo.OpenRepository` instead of `git.OpenRepository`
- Use `gitrepo.DeleteRepository` instead of `util.RemoveAll`
- Use `gitrepo.RenameRepository` instead of `util.Rename`

routers/web/user/setting/adopt.go

@@ -4,12 +4,9 @@
 package setting
 
 import (
-	"path/filepath"
-
 	repo_model "code.gitea.io/gitea/models/repo"
-	user_model "code.gitea.io/gitea/models/user"
+	"code.gitea.io/gitea/modules/gitrepo"
 	"code.gitea.io/gitea/modules/setting"
-	"code.gitea.io/gitea/modules/util"
 	"code.gitea.io/gitea/services/context"
 	repo_service "code.gitea.io/gitea/services/repository"
 )
@@ -27,7 +24,6 @@ func AdoptOrDeleteRepository(ctx *context.Context) {
 	action := ctx.FormString("action")
 
 	ctxUser := ctx.Doer
-	root := user_model.UserPath(ctxUser.LowerName)
 
 	// check not a repo
 	has, err := repo_model.IsRepositoryModelExist(ctx, ctxUser, dir)
@@ -36,12 +32,12 @@ func AdoptOrDeleteRepository(ctx *context.Context) {
 		return
 	}
 
-	isDir, err := util.IsDir(filepath.Join(root, dir+".git"))
+	exist, err := gitrepo.IsRepositoryExist(ctx, repo_model.StorageRepo(repo_model.RelativePath(ctxUser.Name, dir)))
 	if err != nil {
 		ctx.ServerError("IsDir", err)
 		return
 	}
-	if has || !isDir {
+	if has || !exist {
 		// Fallthrough to failure mode
 	} else if action == "adopt" && allowAdopt {
 		if _, err := repo_service.AdoptRepository(ctx, ctxUser, ctxUser, repo_service.CreateRepoOptions{