cmd/geth, eth/downloader: remove copydb command (ethereum#22501)

* cmd/geth: remove copydb command

* eth/downloader: remove fakepeer

cmd/geth/chaincmd.go

@@ -28,14 +28,10 @@ import (
 	"github.com/ethereum/go-ethereum/cmd/utils"
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core"
-	"github.com/ethereum/go-ethereum/core/rawdb"
 	"github.com/ethereum/go-ethereum/core/state"
 	"github.com/ethereum/go-ethereum/core/types"
-	"github.com/ethereum/go-ethereum/eth/downloader"
-	"github.com/ethereum/go-ethereum/event"
 	"github.com/ethereum/go-ethereum/log"
 	"github.com/ethereum/go-ethereum/metrics"
-	"github.com/ethereum/go-ethereum/trie"
 	"gopkg.in/urfave/cli.v1"
 )
 
@@ -150,27 +146,6 @@ be gzipped.`,
 		Category: "BLOCKCHAIN COMMANDS",
 		Description: `
 The export-preimages command export hash preimages to an RLP encoded stream`,
-	}
-	copydbCommand = cli.Command{
-		Action:    utils.MigrateFlags(copyDb),
-		Name:      "copydb",
-		Usage:     "Create a local chain from a target chaindata folder",
-		ArgsUsage: "<sourceChaindataDir>",
-		Flags: []cli.Flag{
-			utils.DataDirFlag,
-			utils.CacheFlag,
-			utils.SyncModeFlag,
-			utils.FakePoWFlag,
-			utils.MainnetFlag,
-			utils.RopstenFlag,
-			utils.RinkebyFlag,
-			utils.TxLookupLimitFlag,
-			utils.GoerliFlag,
-			utils.YoloV3Flag,
-		},
-		Category: "BLOCKCHAIN COMMANDS",
-		Description: `
-The first argument must be the directory containing the blockchain to download from`,
 	}
 	dumpCommand = cli.Command{
 		Action:    utils.MigrateFlags(dump),
@@ -394,62 +369,6 @@ func exportPreimages(ctx *cli.Context) error {
 	return nil
 }
 
-func copyDb(ctx *cli.Context) error {
-	// Ensure we have a source chain directory to copy
-	if len(ctx.Args()) < 1 {
-		utils.Fatalf("Source chaindata directory path argument missing")
-	}
-	if len(ctx.Args()) < 2 {
-		utils.Fatalf("Source ancient chain directory path argument missing")
-	}
-	// Initialize a new chain for the running node to sync into
-	stack, _ := makeConfigNode(ctx)
-	defer stack.Close()
-
-	chain, chainDb := utils.MakeChain(ctx, stack, false)
-	syncMode := *utils.GlobalTextMarshaler(ctx, utils.SyncModeFlag.Name).(*downloader.SyncMode)
-
-	var syncBloom *trie.SyncBloom
-	if syncMode == downloader.FastSync {
-		syncBloom = trie.NewSyncBloom(uint64(ctx.GlobalInt(utils.CacheFlag.Name)/2), chainDb)
-	}
-	dl := downloader.New(0, chainDb, syncBloom, new(event.TypeMux), chain, nil, nil)
-
-	// Create a source peer to satisfy downloader requests from
-	db, err := rawdb.NewLevelDBDatabaseWithFreezer(ctx.Args().First(), ctx.GlobalInt(utils.CacheFlag.Name)/2, 256, ctx.Args().Get(1), "")
-	if err != nil {
-		return err
-	}
-	hc, err := core.NewHeaderChain(db, chain.Config(), chain.Engine(), func() bool { return false })
-	if err != nil {
-		return err
-	}
-	peer := downloader.NewFakePeer("local", db, hc, dl)
-	if err = dl.RegisterPeer("local", 63, peer); err != nil {
-		return err
-	}
-	// Synchronise with the simulated peer
-	start := time.Now()
-
-	currentHeader := hc.CurrentHeader()
-	if err = dl.Synchronise("local", currentHeader.Hash(), hc.GetTd(currentHeader.Hash(), currentHeader.Number.Uint64()), syncMode); err != nil {
-		return err
-	}
-	for dl.Synchronising() {
-		time.Sleep(10 * time.Millisecond)
-	}
-	fmt.Printf("Database copy done in %v\n", time.Since(start))
-
-	// Compact the entire database to remove any sync overhead
-	start = time.Now()
-	fmt.Println("Compacting entire database...")
-	if err = db.Compact(nil, nil); err != nil {
-		utils.Fatalf("Compaction failed: %v", err)
-	}
-	fmt.Printf("Compaction done in %v.\n\n", time.Since(start))
-	return nil
-}
-
 func dump(ctx *cli.Context) error {
 	stack, _ := makeConfigNode(ctx)
 	defer stack.Close()

cmd/geth/main.go

@@ -212,7 +212,6 @@ func init() {
 		exportCommand,
 		importPreimagesCommand,
 		exportPreimagesCommand,
-		copydbCommand,
 		removedbCommand,
 		dumpCommand,
 		dumpGenesisCommand,