cmd/swarm: hashes command (#19008)

cmd/swarm/explore.go

@@ -0,0 +1,59 @@
+// Copyright 2019 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/>.
+
+// Command bzzhash computes a swarm tree hash.
+package main
+
+import (
+	"context"
+	"fmt"
+	"os"
+
+	"github.com/ethereum/go-ethereum/cmd/utils"
+	"github.com/ethereum/go-ethereum/swarm/storage"
+	"gopkg.in/urfave/cli.v1"
+)
+
+var hashesCommand = cli.Command{
+	Action:             hashes,
+	CustomHelpTemplate: helpTemplate,
+	Name:               "hashes",
+	Usage:              "print all hashes of a file to STDOUT",
+	ArgsUsage:          "<file>",
+	Description:        "Prints all hashes of a file to STDOUT",
+}
+
+func hashes(ctx *cli.Context) {
+	args := ctx.Args()
+	if len(args) < 1 {
+		utils.Fatalf("Usage: swarm hashes <file name>")
+	}
+	f, err := os.Open(args[0])
+	if err != nil {
+		utils.Fatalf("Error opening file " + args[1])
+	}
+	defer f.Close()
+
+	fileStore := storage.NewFileStore(&storage.FakeChunkStore{}, storage.NewFileStoreParams())
+	refs, err := fileStore.GetAllReferences(context.TODO(), f, false)
+	if err != nil {
+		utils.Fatalf("%v\n", err)
+	} else {
+		for _, r := range refs {
+			fmt.Println(r.String())
+		}
+	}
+}