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migration.go
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migration.go
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package mg10
import (
"context"
"fmt"
"path"
"github.com/ipfs/fs-repo-migrations/ipfs-10-to-11/_vendor/github.com/ipfs/go-blockservice"
"github.com/ipfs/fs-repo-migrations/ipfs-10-to-11/_vendor/github.com/ipfs/go-datastore"
"github.com/ipfs/fs-repo-migrations/ipfs-10-to-11/_vendor/github.com/ipfs/go-filestore"
"github.com/ipfs/fs-repo-migrations/ipfs-10-to-11/_vendor/github.com/ipfs/go-ipfs-blockstore"
"github.com/ipfs/fs-repo-migrations/ipfs-10-to-11/_vendor/github.com/ipfs/go-ipfs-exchange-offline"
"github.com/ipfs/fs-repo-migrations/ipfs-10-to-11/_vendor/github.com/ipfs/go-ipfs-pinner/pinconv"
"github.com/ipfs/fs-repo-migrations/ipfs-10-to-11/_vendor/github.com/ipfs/go-ipfs/plugin/loader"
"github.com/ipfs/fs-repo-migrations/ipfs-10-to-11/_vendor/github.com/ipfs/go-ipfs/repo"
"github.com/ipfs/fs-repo-migrations/ipfs-10-to-11/_vendor/github.com/ipfs/go-ipfs/repo/fsrepo"
"github.com/ipfs/fs-repo-migrations/ipfs-10-to-11/_vendor/github.com/ipfs/go-ipld-format"
"github.com/ipfs/fs-repo-migrations/ipfs-10-to-11/_vendor/github.com/ipfs/go-merkledag"
migrate "github.com/ipfs/fs-repo-migrations/go-migrate"
mfsr "github.com/ipfs/fs-repo-migrations/mfsr"
log "github.com/ipfs/fs-repo-migrations/stump"
)
type Migration struct{}
func (m Migration) Versions() string {
return "10-to-11"
}
func (m Migration) Reversible() bool {
return true
}
func (m Migration) Apply(opts migrate.Options) error {
log.Verbose = opts.Verbose
log.Log("applying %s repo migration", m.Versions())
err := setupPlugins(opts.Path)
if err != nil {
log.Error("failed to setup plugins", err.Error())
return err
}
// Set to previous version to avoid "needs migration" error. This is safe
// for this migration since repo has not changed.
fsrepo.RepoVersion = 10
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
if !fsrepo.IsInitialized(opts.Path) {
return fmt.Errorf("ipfs repo %q not initialized", opts.Path)
}
log.VLog(" - opening datastore at %q", opts.Path)
r, err := fsrepo.Open(opts.Path)
if err != nil {
return fmt.Errorf("cannot open datastore: %v", err)
}
defer r.Close()
if err = transferPins(ctx, r); err != nil {
log.Error("failed to transfer pins:", err.Error())
return err
}
err = mfsr.RepoPath(opts.Path).WriteVersion("11")
if err != nil {
log.Error("failed to update version file to 11")
return err
}
log.Log("updated version file")
return nil
}
func (m Migration) Revert(opts migrate.Options) error {
log.Verbose = opts.Verbose
log.Log("reverting migration")
err := setupPlugins(opts.Path)
if err != nil {
log.Error("failed to setup plugins", err.Error())
return err
}
if !fsrepo.IsInitialized(opts.Path) {
return fmt.Errorf("ipfs repo %q not initialized", opts.Path)
}
log.VLog(" - opening datastore at %q", opts.Path)
r, err := fsrepo.Open(opts.Path)
if err != nil {
return fmt.Errorf("cannot open datastore: %v", err)
}
defer r.Close()
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
if err = revertPins(ctx, r); err != nil {
return err
}
err = mfsr.RepoPath(opts.Path).WriteVersion("10")
if err != nil {
log.Error("failed to update version file to 10")
return err
}
log.Log("updated version file")
return nil
}
type syncDagService struct {
format.DAGService
syncFn func() error
}
func (s *syncDagService) Sync() error {
return s.syncFn()
}
type batchWrap struct {
datastore.Datastore
}
func (d *batchWrap) Batch() (datastore.Batch, error) {
return datastore.NewBasicBatch(d), nil
}
func setupPlugins(externalPluginsPath string) error {
// Load any external plugins if available on externalPluginsPath
plugins, err := loader.NewPluginLoader(path.Join(externalPluginsPath, "plugins"))
if err != nil {
return fmt.Errorf("error loading plugins: %s", err)
}
// Load preloaded and external plugins
if err := plugins.Initialize(); err != nil {
return fmt.Errorf("error initializing plugins: %s", err)
}
if err := plugins.Inject(); err != nil {
return fmt.Errorf("error initializing plugins: %s", err)
}
return nil
}
func makeStore(r repo.Repo) (datastore.Datastore, format.DAGService, format.DAGService, error) {
dstr := r.Datastore()
dstore := &batchWrap{dstr}
bstore := blockstore.NewBlockstore(dstr)
bserv := blockservice.New(bstore, offline.Exchange(bstore))
dserv := merkledag.NewDAGService(bserv)
internalDag := merkledag.NewDAGService(bserv)
syncFn := func() error {
err := dstore.Sync(blockstore.BlockPrefix)
if err != nil {
return fmt.Errorf("cannot sync blockstore: %v", err)
}
err = dstore.Sync(filestore.FilestorePrefix)
if err != nil {
return fmt.Errorf("cannot sync filestore: %v", err)
}
return nil
}
syncDs := &syncDagService{dserv, syncFn}
syncInternalDag := &syncDagService{internalDag, syncFn}
return dstore, syncDs, syncInternalDag, nil
}
func transferPins(ctx context.Context, r repo.Repo) error {
log.Log("> Upgrading pinning to use datastore")
dstore, dserv, internalDag, err := makeStore(r)
if err != nil {
return err
}
log.Log(" - importing from ipld pinner")
_, toDSCount, err := pinconv.ConvertPinsFromIPLDToDS(ctx, dstore, dserv, internalDag)
if err != nil {
log.Error("failed to convert ipld pin data into datastore")
return err
}
log.Log(" - converted %d pins from ipld storage into datastore", toDSCount)
return nil
}
func revertPins(ctx context.Context, r repo.Repo) error {
log.Log("> Reverting pinning to use ipld storage")
dstore, dserv, internalDag, err := makeStore(r)
if err != nil {
return err
}
_, toIPLDCount, err := pinconv.ConvertPinsFromDSToIPLD(ctx, dstore, dserv, internalDag)
if err != nil {
log.Error("failed to conver pin data from datastore to ipld pinner")
return err
}
log.Log("converted %d pins from datastore to ipld storage", toIPLDCount)
return nil
}