github.com/niluplatform/go-nilu@v1.7.4-0.20200912082737-a0cb0776d52c/cmd/swarm/db.go (about)

     1  // Copyright 2017 The go-ethereum Authors
     2  // This file is part of go-ethereum.
     3  //
     4  // go-ethereum is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // go-ethereum is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU General Public License
    15  // along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package main
    18  
    19  import (
    20  	"fmt"
    21  	"io"
    22  	"os"
    23  	"path/filepath"
    24  
    25  	"github.com/NiluPlatform/go-nilu/cmd/utils"
    26  	"github.com/NiluPlatform/go-nilu/log"
    27  	"github.com/NiluPlatform/go-nilu/swarm/storage"
    28  	"gopkg.in/urfave/cli.v1"
    29  )
    30  
    31  func dbExport(ctx *cli.Context) {
    32  	args := ctx.Args()
    33  	if len(args) != 2 {
    34  		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)")
    35  	}
    36  
    37  	store, err := openDbStore(args[0])
    38  	if err != nil {
    39  		utils.Fatalf("error opening local chunk database: %s", err)
    40  	}
    41  	defer store.Close()
    42  
    43  	var out io.Writer
    44  	if args[1] == "-" {
    45  		out = os.Stdout
    46  	} else {
    47  		f, err := os.Create(args[1])
    48  		if err != nil {
    49  			utils.Fatalf("error opening output file: %s", err)
    50  		}
    51  		defer f.Close()
    52  		out = f
    53  	}
    54  
    55  	count, err := store.Export(out)
    56  	if err != nil {
    57  		utils.Fatalf("error exporting local chunk database: %s", err)
    58  	}
    59  
    60  	log.Info(fmt.Sprintf("successfully exported %d chunks", count))
    61  }
    62  
    63  func dbImport(ctx *cli.Context) {
    64  	args := ctx.Args()
    65  	if len(args) != 2 {
    66  		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)")
    67  	}
    68  
    69  	store, err := openDbStore(args[0])
    70  	if err != nil {
    71  		utils.Fatalf("error opening local chunk database: %s", err)
    72  	}
    73  	defer store.Close()
    74  
    75  	var in io.Reader
    76  	if args[1] == "-" {
    77  		in = os.Stdin
    78  	} else {
    79  		f, err := os.Open(args[1])
    80  		if err != nil {
    81  			utils.Fatalf("error opening input file: %s", err)
    82  		}
    83  		defer f.Close()
    84  		in = f
    85  	}
    86  
    87  	count, err := store.Import(in)
    88  	if err != nil {
    89  		utils.Fatalf("error importing local chunk database: %s", err)
    90  	}
    91  
    92  	log.Info(fmt.Sprintf("successfully imported %d chunks", count))
    93  }
    94  
    95  func dbClean(ctx *cli.Context) {
    96  	args := ctx.Args()
    97  	if len(args) != 1 {
    98  		utils.Fatalf("invalid arguments, please specify <chunkdb> (path to a local chunk database)")
    99  	}
   100  
   101  	store, err := openDbStore(args[0])
   102  	if err != nil {
   103  		utils.Fatalf("error opening local chunk database: %s", err)
   104  	}
   105  	defer store.Close()
   106  
   107  	store.Cleanup()
   108  }
   109  
   110  func openDbStore(path string) (*storage.DbStore, error) {
   111  	if _, err := os.Stat(filepath.Join(path, "CURRENT")); err != nil {
   112  		return nil, fmt.Errorf("invalid chunkdb path: %s", err)
   113  	}
   114  	hash := storage.MakeHashFunc("SHA3")
   115  	return storage.NewDbStore(path, hash, 10000000, 0)
   116  }