Split lfs size from repository size (#22900)

releated to #21820

- Split `Size` in repository table as two new colunms, one is `GitSize`
for git size, the other is `LFSSize` for lfs data. still store full size
in `Size` colunm.
- Show full size on ui, but show each of them by a `title`;  example:

![image](https://user-images.githubusercontent.com/25342410/218636251-e200f085-d7e7-4a25-9ff1-b586a63e07a9.png)

- Return full size in api response.

---------

Signed-off-by: a1012112796 <1012112796@qq.com>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: DmitryFrolovTri <23313323+DmitryFrolovTri@users.noreply.github.com>
Co-authored-by: Giteabot <teabot@gitea.io>

models/migrations/migrations.go

@@ -507,6 +507,8 @@ var migrations = []Migration{
 	NewMigration("Add variable table", v1_21.CreateVariableTable),
 	// v262 -> v263
 	NewMigration("Add TriggerEvent to action_run table", v1_21.AddTriggerEventToActionRun),
+	// v263 -> v264
+	NewMigration("Add git_size and lfs_size columns to repository table", v1_21.AddGitSizeAndLFSSizeToRepositoryTable),
 }
 
 // GetCurrentDBVersion returns the current db version

models/migrations/v1_21/v263.go

@@ -0,0 +1,41 @@
+// Copyright 2023 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package v1_21 //nolint
+
+import (
+	"fmt"
+
+	"xorm.io/xorm"
+)
+
+// AddGitSizeAndLFSSizeToRepositoryTable: add GitSize and LFSSize columns to Repository
+func AddGitSizeAndLFSSizeToRepositoryTable(x *xorm.Engine) error {
+	type Repository struct {
+		GitSize int64 `xorm:"NOT NULL DEFAULT 0"`
+		LFSSize int64 `xorm:"NOT NULL DEFAULT 0"`
+	}
+
+	sess := x.NewSession()
+	defer sess.Close()
+
+	if err := sess.Begin(); err != nil {
+		return err
+	}
+
+	if err := sess.Sync2(new(Repository)); err != nil {
+		return fmt.Errorf("Sync2: %w", err)
+	}
+
+	_, err := sess.Exec(`UPDATE repository SET lfs_size=(SELECT SUM(size) FROM lfs_meta_object WHERE lfs_meta_object.repository_id=repository.ID) WHERE EXISTS (SELECT 1 FROM lfs_meta_object WHERE lfs_meta_object.repository_id=repository.ID)`)
+	if err != nil {
+		return err
+	}
+
+	_, err = sess.Exec(`UPDATE repository SET git_size = size - lfs_size`)
+	if err != nil {
+		return err
+	}
+
+	return sess.Commit()
+}