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package main
import (
"fmt"
"os"
"path/filepath"
"strings"
"sync"
"github.com/jessevdk/go-flags"
"github.com/lightninglabs/loop"
"github.com/lightningnetwork/lnd/build"
"github.com/lightningnetwork/lnd/lntypes"
)
const (
defaultConfTarget = int32(6)
)
var (
defaultConfigFilename = "loopd.conf"
swaps = make(map[lntypes.Hash]loop.SwapInfo)
subscribers = make(map[int]chan<- interface{})
nextSubscriberID int
swapsLock sync.Mutex
)
func main() {
err := start()
if err != nil {
fmt.Println(err)
}
}
func start() error {
config := defaultConfig
// Parse command line flags.
parser := flags.NewParser(&config, flags.Default)
parser.SubcommandsOptional = true
_, err := parser.Parse()
if e, ok := err.(*flags.Error); ok && e.Type == flags.ErrHelp {
return nil
}
if err != nil {
return err
}
// Parse ini file.
loopDir := filepath.Join(loopDirBase, config.Network)
if err := os.MkdirAll(loopDir, os.ModePerm); err != nil {
return err
}
configFile := filepath.Join(loopDir, defaultConfigFilename)
if err := flags.IniParse(configFile, &config); err != nil {
// If it's a parsing related error, then we'll return
// immediately, otherwise we can proceed as possibly the config
// file doesn't exist which is OK.
if _, ok := err.(*flags.IniError); ok {
return err
}
}
// Parse command line flags again to restore flags overwritten by ini
// parse.
_, err = parser.Parse()
if err != nil {
return err
}
// Show the version and exit if the version flag was specified.
appName := filepath.Base(os.Args[0])
appName = strings.TrimSuffix(appName, filepath.Ext(appName))
if config.ShowVersion {
fmt.Println(appName, "version", loop.Version())
os.Exit(0)
}
// Special show command to list supported subsystems and exit.
if config.DebugLevel == "show" {
fmt.Printf("Supported subsystems: %v\n",
logWriter.SupportedSubsystems())
os.Exit(0)
}
// Append the network type to the log directory so it is
// "namespaced" per network in the same fashion as the data directory.
config.LogDir = filepath.Join(config.LogDir, config.Network)
// Initialize logging at the default logging level.
err = logWriter.InitLogRotator(
filepath.Join(config.LogDir, defaultLogFilename),
config.MaxLogFileSize, config.MaxLogFiles,
)
if err != nil {
return err
}
err = build.ParseAndSetDebugLevels(config.DebugLevel, logWriter)
if err != nil {
return err
}
// Print the version before executing either primary directive.
log.Infof("Version: %v", loop.Version())
// Execute command.
if parser.Active == nil {
return daemon(&config)
}
if parser.Active.Name == "view" {
return view(&config)
}
return fmt.Errorf("unimplemented command %v", parser.Active.Name)
}