cmd/swarm: support exporting, importing chunk db (#14868)

1 files changed, 116 insertions, 0 deletions

diff --git a/cmd/swarm/db.go b/cmd/swarm/db.go
new file mode 100644
index 000000000..dfd2d069b
--- /dev/null
+++ b/cmd/swarm/db.go
@@ -0,0 +1,116 @@
+// Copyright 2017 The go-ethereum Authors
+// This file is part of go-ethereum.
+//
+// go-ethereum 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.
+//
+// go-ethereum 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 go-ethereum. If not, see <http://www.gnu.org/licenses/>.
+
+package main
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+
+	"github.com/ethereum/go-ethereum/cmd/utils"
+	"github.com/ethereum/go-ethereum/log"
+	"github.com/ethereum/go-ethereum/swarm/storage"
+	"gopkg.in/urfave/cli.v1"
+)
+
+func dbExport(ctx *cli.Context) {
+	args := ctx.Args()
+	if len(args) != 2 {
+		utils.Fatalf("invalid arguments, please specify both <chunkdb> (path to a local chunk database) and <file> (path to write the tar archive to, - for stdout)")
+	}
+
+	store, err := openDbStore(args[0])
+	if err != nil {
+		utils.Fatalf("error opening local chunk database: %s", err)
+	}
+	defer store.Close()
+
+	var out io.Writer
+	if args[1] == "-" {
+		out = os.Stdout
+	} else {
+		f, err := os.Create(args[1])
+		if err != nil {
+			utils.Fatalf("error opening output file: %s", err)
+		}
+		defer f.Close()
+		out = f
+	}
+
+	count, err := store.Export(out)
+	if err != nil {
+		utils.Fatalf("error exporting local chunk database: %s", err)
+	}
+
+	log.Info(fmt.Sprintf("successfully exported %d chunks", count))
+}
+
+func dbImport(ctx *cli.Context) {
+	args := ctx.Args()
+	if len(args) != 2 {
+		utils.Fatalf("invalid arguments, please specify both <chunkdb> (path to a local chunk database) and <file> (path to read the tar archive from, - for stdin)")
+	}
+
+	store, err := openDbStore(args[0])
+	if err != nil {
+		utils.Fatalf("error opening local chunk database: %s", err)
+	}
+	defer store.Close()
+
+	var in io.Reader
+	if args[1] == "-" {
+		in = os.Stdin
+	} else {
+		f, err := os.Open(args[1])
+		if err != nil {
+			utils.Fatalf("error opening input file: %s", err)
+		}
+		defer f.Close()
+		in = f
+	}
+
+	count, err := store.Import(in)
+	if err != nil {
+		utils.Fatalf("error importing local chunk database: %s", err)
+	}
+
+	log.Info(fmt.Sprintf("successfully imported %d chunks", count))
+}
+
+func dbClean(ctx *cli.Context) {
+	args := ctx.Args()
+	if len(args) != 1 {
+		utils.Fatalf("invalid arguments, please specify <chunkdb> (path to a local chunk database)")
+	}
+
+	store, err := openDbStore(args[0])
+	if err != nil {
+		utils.Fatalf("error opening local chunk database: %s", err)
+	}
+	defer store.Close()
+
+	store.Cleanup()
+}
+
+func openDbStore(path string) (*storage.DbStore, error) {
+	if _, err := os.Stat(filepath.Join(path, "CURRENT")); err != nil {
+		return nil, fmt.Errorf("invalid chunkdb path: %s", err)
+	}
+	hash := storage.MakeHashFunc("SHA3")
+	return storage.NewDbStore(path, hash, 10000000, 0)
+}