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import-car.go
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import-car.go
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package main
import (
"context"
"encoding/hex"
"fmt"
"io"
"os"
block "github.com/ipfs/go-block-format"
"github.com/ipfs/go-cid"
"github.com/ipld/go-car"
"github.com/urfave/cli/v2"
"golang.org/x/xerrors"
"github.com/filecoin-project/lotus/node/repo"
)
var importCarCmd = &cli.Command{
Name: "import-car",
Description: "Import a car file into node chain blockstore",
Action: func(cctx *cli.Context) error {
r, err := repo.NewFS(cctx.String("repo"))
if err != nil {
return xerrors.Errorf("opening fs repo: %w", err)
}
ctx := context.TODO()
exists, err := r.Exists()
if err != nil {
return err
}
if !exists {
return xerrors.Errorf("lotus repo doesn't exist")
}
lr, err := r.Lock(repo.FullNode)
if err != nil {
return err
}
defer lr.Close() //nolint:errcheck
cf := cctx.Args().Get(0)
f, err := os.OpenFile(cf, os.O_RDONLY, 0664)
if err != nil {
return xerrors.Errorf("opening the car file: %w", err)
}
bs, err := lr.Blockstore(ctx, repo.UniversalBlockstore)
if err != nil {
return err
}
defer func() {
if c, ok := bs.(io.Closer); ok {
if err := c.Close(); err != nil {
log.Warnf("failed to close blockstore: %s", err)
}
}
}()
cr, err := car.NewCarReader(f)
if err != nil {
return err
}
for {
blk, err := cr.Next()
switch err {
case io.EOF:
if err := f.Close(); err != nil {
return err
}
fmt.Println()
return nil
default:
if err := f.Close(); err != nil {
return err
}
fmt.Println()
return err
case nil:
fmt.Printf("\r%s", blk.Cid())
if err := bs.Put(context.Background(), blk); err != nil {
if err := f.Close(); err != nil {
return err
}
return xerrors.Errorf("put %s: %w", blk.Cid(), err)
}
}
}
},
}
var importObjectCmd = &cli.Command{
Name: "import-obj",
Usage: "import a raw ipld object into your datastore",
Action: func(cctx *cli.Context) error {
r, err := repo.NewFS(cctx.String("repo"))
if err != nil {
return xerrors.Errorf("opening fs repo: %w", err)
}
ctx := context.TODO()
exists, err := r.Exists()
if err != nil {
return err
}
if !exists {
return xerrors.Errorf("lotus repo doesn't exist")
}
lr, err := r.Lock(repo.FullNode)
if err != nil {
return err
}
defer lr.Close() //nolint:errcheck
bs, err := lr.Blockstore(ctx, repo.UniversalBlockstore)
if err != nil {
return fmt.Errorf("failed to open blockstore: %w", err)
}
defer func() {
if c, ok := bs.(io.Closer); ok {
if err := c.Close(); err != nil {
log.Warnf("failed to close blockstore: %s", err)
}
}
}()
c, err := cid.Decode(cctx.Args().Get(0))
if err != nil {
return err
}
data, err := hex.DecodeString(cctx.Args().Get(1))
if err != nil {
return err
}
blk, err := block.NewBlockWithCid(data, c)
if err != nil {
return err
}
if err := bs.Put(context.Background(), blk); err != nil {
return err
}
return nil
},
}