mirror of
https://github.com/octoleo/syncthing.git
synced 2024-11-19 03:25:16 +00:00
84 lines
2.3 KiB
Go
84 lines
2.3 KiB
Go
// Copyright (C) 2014 The Syncthing Authors.
|
|
//
|
|
// This Source Code Form is subject to the terms of the Mozilla Public
|
|
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
|
|
// You can obtain one at https://mozilla.org/MPL/2.0/.
|
|
|
|
// Package versioner implements common interfaces for file versioning and a
|
|
// simple default versioning scheme.
|
|
package versioner
|
|
|
|
import (
|
|
"context"
|
|
"errors"
|
|
"fmt"
|
|
"time"
|
|
|
|
"github.com/syncthing/syncthing/lib/config"
|
|
)
|
|
|
|
type Versioner interface {
|
|
Archive(filePath string) error
|
|
GetVersions() (map[string][]FileVersion, error)
|
|
Restore(filePath string, versionTime time.Time) error
|
|
Clean(context.Context) error
|
|
}
|
|
|
|
type FileVersion struct {
|
|
VersionTime time.Time `json:"versionTime"`
|
|
ModTime time.Time `json:"modTime"`
|
|
Size int64 `json:"size"`
|
|
}
|
|
|
|
type factory func(cfg config.FolderConfiguration) Versioner
|
|
|
|
var factories = make(map[string]factory)
|
|
|
|
var ErrRestorationNotSupported = errors.New("version restoration not supported with the current versioner")
|
|
|
|
const (
|
|
TimeFormat = "20060102-150405"
|
|
timeGlob = "[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]-[0-9][0-9][0-9][0-9][0-9][0-9]" // glob pattern matching TimeFormat
|
|
)
|
|
|
|
func New(cfg config.FolderConfiguration) (Versioner, error) {
|
|
fac, ok := factories[cfg.Versioning.Type]
|
|
if !ok {
|
|
return nil, fmt.Errorf("requested versioning type %q does not exist", cfg.Type)
|
|
}
|
|
|
|
return &versionerWithErrorContext{
|
|
Versioner: fac(cfg),
|
|
vtype: cfg.Versioning.Type,
|
|
}, nil
|
|
}
|
|
|
|
type versionerWithErrorContext struct {
|
|
Versioner
|
|
vtype string
|
|
}
|
|
|
|
func (v *versionerWithErrorContext) wrapError(err error, op string) error {
|
|
if err != nil {
|
|
return fmt.Errorf("%s versioner: %v: %w", v.vtype, op, err)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (v *versionerWithErrorContext) Archive(filePath string) error {
|
|
return v.wrapError(v.Versioner.Archive(filePath), "archive")
|
|
}
|
|
|
|
func (v *versionerWithErrorContext) GetVersions() (map[string][]FileVersion, error) {
|
|
versions, err := v.Versioner.GetVersions()
|
|
return versions, v.wrapError(err, "get versions")
|
|
}
|
|
|
|
func (v *versionerWithErrorContext) Restore(filePath string, versionTime time.Time) error {
|
|
return v.wrapError(v.Versioner.Restore(filePath, versionTime), "restore")
|
|
}
|
|
|
|
func (v *versionerWithErrorContext) Clean(ctx context.Context) error {
|
|
return v.wrapError(v.Versioner.Clean(ctx), "clean")
|
|
}
|