forked from oniony/TMSU
-
Notifications
You must be signed in to change notification settings - Fork 0
/
storage.go
101 lines (77 loc) · 2.13 KB
/
storage.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
// Copyright 2011-2018 Paul Ruane.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package storage
import (
"fmt"
"github.com/oniony/TMSU/common/log"
"github.com/oniony/TMSU/storage/database"
"path/filepath"
)
type Storage struct {
db *database.Database
DbPath string
RootPath string
}
func CreateAt(path string) error {
return database.CreateAt(path)
}
func OpenAt(path string) (*Storage, error) {
db, err := database.OpenAt(path)
if err != nil {
return nil, err
}
rootPath, err := determineRootPath(path)
if err != nil {
return nil, err
}
log.Infof(2, "files are stored relative to root path '%v'", rootPath)
return &Storage{db, path, rootPath}, nil
}
func (storage *Storage) Begin() (*Tx, error) {
tx, err := storage.db.Begin()
if err != nil {
return nil, err
}
return &Tx{tx}, nil
}
func (storage *Storage) Close() error {
if storage.db == nil {
return nil
}
err := storage.db.Close()
if err != nil {
return fmt.Errorf("could not close database: %v", err)
}
storage.db = nil
return nil
}
type Tx struct {
tx *database.Tx
}
func (tx *Tx) Commit() error {
return tx.tx.Commit()
}
func (tx *Tx) Rollback() error {
return tx.tx.Rollback()
}
// unexported
func determineRootPath(dbPath string) (string, error) {
absDbPath, err := filepath.Abs(dbPath)
if err != nil {
return "", AbsolutePathResolutionError{dbPath, err}
}
absDbDirPath := filepath.Dir(absDbPath)
if filepath.Base(absDbDirPath) == ".tmsu" {
return filepath.Dir(absDbDirPath), nil
}
return string(filepath.Separator), nil //TODO Windows
}