371dfdd76a
This was driving me insane when building with -a -v and it slowed down the process dramatically. ok davec
117 lines
3.5 KiB
Go
117 lines
3.5 KiB
Go
// Copyright (c) 2013 Conformal Systems LLC.
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// Use of this source code is governed by an ISC
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// license that can be found in the LICENSE file.
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package main
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import (
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"fmt"
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"github.com/conformal/btcdb"
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_ "github.com/conformal/btcdb/ldb"
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"github.com/conformal/btcutil"
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"github.com/conformal/btcwire"
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"github.com/conformal/go-flags"
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"os"
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"path/filepath"
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)
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const (
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minCandidates = 1
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maxCandidates = 20
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defaultNumCandidates = 5
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defaultDbType = "leveldb"
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)
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var (
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btcdHomeDir = btcutil.AppDataDir("btcd", false)
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defaultDataDir = filepath.Join(btcdHomeDir, "data")
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knownDbTypes = btcdb.SupportedDBs()
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activeNetwork = btcwire.MainNet
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)
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// config defines the configuration options for findcheckpoint.
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//
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// See loadConfig for details on the configuration load process.
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type config struct {
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DataDir string `short:"b" long:"datadir" description:"Location of the btcd data directory"`
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DbType string `long:"dbtype" description:"Database backend to use for the Block Chain"`
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TestNet3 bool `long:"testnet" description:"Use the test network"`
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NumCandidates int `short:"n" long:"numcandidates" description:"Max num of checkpoint candidates to show {1-20}"`
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UseGoOutput bool `short:"g" long:"gooutput" description:"Display the candidates using Go syntax that is ready to insert into the btcchain checkpoint list"`
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}
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// validDbType returns whether or not dbType is a supported database type.
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func validDbType(dbType string) bool {
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for _, knownType := range knownDbTypes {
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if dbType == knownType {
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return true
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}
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}
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return false
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}
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// netName returns a human-readable name for the passed bitcoin network.
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func netName(btcnet btcwire.BitcoinNet) string {
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net := "mainnet"
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if btcnet == btcwire.TestNet3 {
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net = "testnet"
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}
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return net
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}
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// loadConfig initializes and parses the config using command line options.
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func loadConfig() (*config, []string, error) {
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// Default config.
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cfg := config{
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DataDir: defaultDataDir,
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DbType: defaultDbType,
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NumCandidates: defaultNumCandidates,
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}
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// Parse command line options.
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parser := flags.NewParser(&cfg, flags.Default)
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remainingArgs, err := parser.Parse()
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if err != nil {
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if e, ok := err.(*flags.Error); !ok || e.Type != flags.ErrHelp {
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parser.WriteHelp(os.Stderr)
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}
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return nil, nil, err
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}
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// Choose the active network based on the flags.
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if cfg.TestNet3 {
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activeNetwork = btcwire.TestNet3
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}
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// Validate database type.
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if !validDbType(cfg.DbType) {
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str := "%s: The specified database type [%v] is invalid -- " +
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"supported types %v"
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err := fmt.Errorf(str, "loadConfig", cfg.DbType, knownDbTypes)
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fmt.Fprintln(os.Stderr, err)
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parser.WriteHelp(os.Stderr)
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return nil, nil, err
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}
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// Append the network type to the data directory so it is "namespaced"
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// per network. In addition to the block database, there are other
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// pieces of data that are saved to disk such as address manager state.
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// All data is specific to a network, so namespacing the data directory
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// means each individual piece of serialized data does not have to
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// worry about changing names per network and such.
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cfg.DataDir = filepath.Join(cfg.DataDir, netName(activeNetwork))
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// Validate the number of candidates.
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if cfg.NumCandidates < minCandidates || cfg.NumCandidates > maxCandidates {
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str := "%s: The specified number of candidates is out of " +
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"range -- parsed [%v]"
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err = fmt.Errorf(str, "loadConfig", cfg.NumCandidates)
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fmt.Fprintln(os.Stderr, err)
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parser.WriteHelp(os.Stderr)
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return nil, nil, err
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}
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return &cfg, remainingArgs, nil
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}
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