mirror of
https://github.com/octoleo/restic.git
synced 2024-12-27 04:32:40 +00:00
126 lines
3.2 KiB
Go
126 lines
3.2 KiB
Go
package migrations
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"os"
|
|
"path/filepath"
|
|
|
|
"github.com/restic/restic/internal/backend"
|
|
"github.com/restic/restic/internal/restic"
|
|
)
|
|
|
|
func init() {
|
|
register(&UpgradeRepoV2{})
|
|
}
|
|
|
|
type UpgradeRepoV2Error struct {
|
|
UploadNewConfigError error
|
|
ReuploadOldConfigError error
|
|
|
|
BackupFilePath string
|
|
}
|
|
|
|
func (err *UpgradeRepoV2Error) Error() string {
|
|
if err.ReuploadOldConfigError != nil {
|
|
return fmt.Sprintf("error uploading config (%v), re-uploading old config filed failed as well (%v), but there is a backup of the config file in %v", err.UploadNewConfigError, err.ReuploadOldConfigError, err.BackupFilePath)
|
|
}
|
|
|
|
return fmt.Sprintf("error uploading config (%v), re-uploaded old config was successful, there is a backup of the config file in %v", err.UploadNewConfigError, err.BackupFilePath)
|
|
}
|
|
|
|
func (err *UpgradeRepoV2Error) Unwrap() error {
|
|
// consider the original upload error as the primary cause
|
|
return err.UploadNewConfigError
|
|
}
|
|
|
|
type UpgradeRepoV2 struct{}
|
|
|
|
func (*UpgradeRepoV2) Name() string {
|
|
return "upgrade_repo_v2"
|
|
}
|
|
|
|
func (*UpgradeRepoV2) Desc() string {
|
|
return "upgrade a repository to version 2"
|
|
}
|
|
|
|
func (*UpgradeRepoV2) Check(_ context.Context, repo restic.Repository) (bool, string, error) {
|
|
isV1 := repo.Config().Version == 1
|
|
reason := ""
|
|
if !isV1 {
|
|
reason = fmt.Sprintf("repository is already upgraded to version %v", repo.Config().Version)
|
|
}
|
|
return isV1, reason, nil
|
|
}
|
|
|
|
func (*UpgradeRepoV2) RepoCheck() bool {
|
|
return true
|
|
}
|
|
func (*UpgradeRepoV2) upgrade(ctx context.Context, repo restic.Repository) error {
|
|
h := backend.Handle{Type: backend.ConfigFile}
|
|
|
|
if !repo.Backend().HasAtomicReplace() {
|
|
// remove the original file for backends which do not support atomic overwriting
|
|
err := repo.Backend().Remove(ctx, h)
|
|
if err != nil {
|
|
return fmt.Errorf("remove config failed: %w", err)
|
|
}
|
|
}
|
|
|
|
// upgrade config
|
|
cfg := repo.Config()
|
|
cfg.Version = 2
|
|
|
|
err := restic.SaveConfig(ctx, repo, cfg)
|
|
if err != nil {
|
|
return fmt.Errorf("save new config file failed: %w", err)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (m *UpgradeRepoV2) Apply(ctx context.Context, repo restic.Repository) error {
|
|
tempdir, err := os.MkdirTemp("", "restic-migrate-upgrade-repo-v2-")
|
|
if err != nil {
|
|
return fmt.Errorf("create temp dir failed: %w", err)
|
|
}
|
|
|
|
h := backend.Handle{Type: restic.ConfigFile}
|
|
|
|
// read raw config file and save it to a temp dir, just in case
|
|
rawConfigFile, err := repo.LoadRaw(ctx, restic.ConfigFile, restic.ID{})
|
|
if err != nil {
|
|
return fmt.Errorf("load config file failed: %w", err)
|
|
}
|
|
|
|
backupFileName := filepath.Join(tempdir, "config")
|
|
err = os.WriteFile(backupFileName, rawConfigFile, 0600)
|
|
if err != nil {
|
|
return fmt.Errorf("write config file backup to %v failed: %w", tempdir, err)
|
|
}
|
|
|
|
// run the upgrade
|
|
err = m.upgrade(ctx, repo)
|
|
if err != nil {
|
|
|
|
// build an error we can return to the caller
|
|
repoError := &UpgradeRepoV2Error{
|
|
UploadNewConfigError: err,
|
|
BackupFilePath: backupFileName,
|
|
}
|
|
|
|
// try contingency methods, reupload the original file
|
|
_ = repo.Backend().Remove(ctx, h)
|
|
err = repo.Backend().Save(ctx, h, backend.NewByteReader(rawConfigFile, nil))
|
|
if err != nil {
|
|
repoError.ReuploadOldConfigError = err
|
|
}
|
|
|
|
return repoError
|
|
}
|
|
|
|
_ = os.Remove(backupFileName)
|
|
_ = os.Remove(tempdir)
|
|
return nil
|
|
}
|