refactor cli and gui wrapper code. Details:

- all cli functions shared between ethereum and ethereal abstracted to utils/ cmd.go (should be ethcommon or shared or sth)
- simplify main() now readable stepwise
- rename main wrapper files to main.go
- rename commmand line args definition file from config.go to flags.go
- rename Do -> Start to parallel option names
- register interrupt for rpc server stop
- fix interrupt stopping js repl and ethereum
- register interrupt for mining stop
- custom config file option from command line
- debug option from command line
- loglevel option from command line
- changed ethutil.Config API
- default datadir and default config file set together with other flag defaults in wrappers
- default assetpath set together with other command line flags defaults in gui wrapper (not in ethutil.Config or ui/ui_lib)
- options precedence: default < config file < environment variables < command line

4 files changed, 104 insertions, 201 deletions

diff --git a/ethereum/cmd.go b/ethereum/cmd.go
new file mode 100644
index 000000000..0e9c2be8c
--- /dev/null
+++ b/ethereum/cmd.go
@@ -0,0 +1,33 @@
+package main
+
+import (
+  "github.com/ethereum/eth-go"
+  "github.com/ethereum/go-ethereum/utils"
+  "os"
+  "io/ioutil"
+)
+
+func InitJsConsole(ethereum *eth.Ethereum) {
+  repl := NewJSRepl(ethereum)
+  go repl.Start()
+  utils.RegisterInterrupt(func(os.Signal) {
+    repl.Stop()
+    ethereum.Stop()
+  })
+}
+
+func ExecJsFile (ethereum *eth.Ethereum, InputFile string) {
+  file, err := os.Open(InputFile)
+  if err != nil {
+    logger.Fatalln(err)
+  }
+  content, err := ioutil.ReadAll(file)
+  if err != nil {
+    logger.Fatalln(err)
+  }
+  re := NewJSRE(ethereum)
+  utils.RegisterInterrupt(func(os.Signal) {
+    re.Stop()
+  })
+  re.Run(string(content))
+}
diff --git a/ethereum/ethereum.go b/ethereum/ethereum.go
deleted file mode 100644
index 8812e0a60..000000000
--- a/ethereum/ethereum.go
+++ /dev/null
@@ -1,193 +0,0 @@
-package main
-
-import (
-	"fmt"
-	"github.com/ethereum/eth-go"
-	"github.com/ethereum/eth-go/ethutil"
-	"github.com/ethereum/go-ethereum/utils"
-	"github.com/rakyll/globalconf"
-	"io/ioutil"
-	"log"
-	"os"
-	"os/signal"
-	"path"
-	"runtime"
-	"strings"
-)
-
-const Debug = true
-
-func RegisterInterrupt(cb func(os.Signal)) {
-	go func() {
-		// Buffered chan of one is enough
-		c := make(chan os.Signal, 1)
-		// Notify about interrupts for now
-		signal.Notify(c, os.Interrupt)
-
-		for sig := range c {
-			cb(sig)
-		}
-	}()
-}
-
-func confirm(message string) bool {
-	fmt.Println(message, "Are you sure? (y/n)")
-	var r string
-	fmt.Scanln(&r)
-	for ; ; fmt.Scanln(&r) {
-		if r == "n" || r == "y" {
-			break
-		} else {
-			fmt.Printf("Yes or no?", r)
-		}
-	}
-	return r == "y"
-}
-
-func main() {
-	Init()
-
-	runtime.GOMAXPROCS(runtime.NumCPU())
-
-	// set logger
-	var logSys *log.Logger
-	flags := log.LstdFlags
-
-	var lt ethutil.LoggerType
-	if StartJsConsole || len(InputFile) > 0 {
-		lt = ethutil.LogFile
-	} else {
-		lt = ethutil.LogFile | ethutil.LogStd
-	}
-
-	g, err := globalconf.NewWithOptions(&globalconf.Options{
-		Filename: path.Join(ethutil.ApplicationFolder(Datadir), "conf.ini"),
-	})
-	if err != nil {
-		fmt.Println(err)
-	} else {
-		g.ParseAll()
-	}
-	ethutil.ReadConfig(Datadir, lt, g, Identifier)
-
-	logger := ethutil.Config.Log
-
-	if LogFile != "" {
-		logfile, err := os.OpenFile(LogFile, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
-		if err != nil {
-			panic(fmt.Sprintf("error opening log file '%s': %v", LogFile, err))
-		}
-		defer logfile.Close()
-		log.SetOutput(logfile)
-		logSys = log.New(logfile, "", flags)
-		logger.AddLogSystem(logSys)
-	} else {
-		logSys = log.New(os.Stdout, "", flags)
-	}
-
-	// Instantiated a eth stack
-	ethereum, err := eth.New(eth.CapDefault, UseUPnP)
-	if err != nil {
-		log.Println("eth start err:", err)
-		return
-	}
-	ethereum.Port = OutboundPort
-
-	// bookkeeping tasks
-	switch {
-	case GenAddr:
-		if NonInteractive || confirm("This action overwrites your old private key.") {
-			utils.CreateKeyPair(true)
-		}
-		os.Exit(0)
-	case len(ImportKey) > 0:
-		if NonInteractive || confirm("This action overwrites your old private key.") {
-			mnemonic := strings.Split(ImportKey, " ")
-			if len(mnemonic) == 24 {
-				logSys.Println("Got mnemonic key, importing.")
-				key := ethutil.MnemonicDecode(mnemonic)
-				utils.ImportPrivateKey(key)
-			} else if len(mnemonic) == 1 {
-				logSys.Println("Got hex key, importing.")
-				utils.ImportPrivateKey(ImportKey)
-			} else {
-				logSys.Println("Did not recognise format, exiting.")
-			}
-		}
-		os.Exit(0)
-	case ExportKey:
-		keyPair := ethutil.GetKeyRing().Get(0)
-		fmt.Printf(`
-Generating new address and keypair.
-Please keep your keys somewhere save.
-
-++++++++++++++++ KeyRing +++++++++++++++++++
-addr: %x
-prvk: %x
-pubk: %x
-++++++++++++++++++++++++++++++++++++++++++++
-save these words so you can restore your account later: %s
-`, keyPair.Address(), keyPair.PrivateKey, keyPair.PublicKey)
-
-		os.Exit(0)
-	case ShowGenesis:
-		logSys.Println(ethereum.BlockChain().Genesis())
-		os.Exit(0)
-	default:
-		// Creates a keypair if non exists
-		utils.CreateKeyPair(false)
-	}
-
-	// client
-	logger.Infoln(fmt.Sprintf("Starting Ethereum v%s", ethutil.Config.Ver))
-
-	// Set the max peers
-	ethereum.MaxPeers = MaxPeer
-
-	// Set Mining status
-	ethereum.Mining = StartMining
-
-	if StartMining {
-		utils.DoMining(ethereum)
-	}
-
-	if StartJsConsole {
-		repl := NewJSRepl(ethereum)
-
-		go repl.Start()
-
-		RegisterInterrupt(func(os.Signal) {
-			repl.Stop()
-		})
-	} else if len(InputFile) > 0 {
-		file, err := os.Open(InputFile)
-		if err != nil {
-			ethutil.Config.Log.Fatal(err)
-		}
-
-		content, err := ioutil.ReadAll(file)
-		if err != nil {
-			ethutil.Config.Log.Fatal(err)
-		}
-
-		re := NewJSRE(ethereum)
-		RegisterInterrupt(func(os.Signal) {
-			re.Stop()
-		})
-		re.Run(string(content))
-	}
-
-	if StartRpc {
-		utils.DoRpc(ethereum, RpcPort)
-	}
-
-	RegisterInterrupt(func(sig os.Signal) {
-		fmt.Printf("Shutting down (%v) ... \n", sig)
-		ethereum.Stop()
-	})
-
-	ethereum.Start(UseSeed)
-
-	// Wait for shutdown
-	ethereum.WaitForShutdown()
-}
diff --git a/ethereum/config.go b/ethereum/flags.go
index a80b47a8e..513d93a6d 100644
--- a/ethereum/config.go
+++ b/ethereum/flags.go
@@ -4,10 +4,12 @@ import (
 	"flag"
 	"fmt"
 	"os"
+  "os/user"
+  "path"
+  "github.com/ethereum/eth-go/ethlog"
 )
 
 var Identifier string
-var StartMining bool
 var StartRpc bool
 var RpcPort int
 var UseUPnP bool
@@ -19,16 +21,28 @@ var GenAddr bool
 var UseSeed bool
 var ImportKey string
 var ExportKey bool
-var LogFile string
 var NonInteractive bool
+var Datadir string
+var LogFile string
+var ConfigFile string
+var DebugFile string
+var LogLevel int
+
+// flags specific to cli client
+var StartMining bool
 var StartJsConsole bool
 var InputFile string
 
-var Datadir string
+func defaultDataDir() string {
+  usr, _ := user.Current()
+  return path.Join(usr.HomeDir, ".ethereum")
+}
+
+var defaultConfigFile = path.Join(defaultDataDir(), "conf.ini")
 
 func Init() {
 	flag.Usage = func() {
-		fmt.Fprintf(os.Stderr, "%s [options] [filename]:\n", os.Args[0])
+		fmt.Fprintf(os.Stderr, "%s [options] [filename]:\noptions precedence: default < config file < environment variables < command line", os.Args[0])
 		flag.PrintDefaults()
 	}
 
@@ -38,17 +52,19 @@ func Init() {
 	flag.IntVar(&MaxPeer, "maxpeer", 10, "maximum desired peers")
 	flag.IntVar(&RpcPort, "rpcport", 8080, "port to start json-rpc server on")
 	flag.BoolVar(&StartRpc, "rpc", false, "start rpc server")
-	flag.BoolVar(&StartJsConsole, "js", false, "exp")
-
-	flag.BoolVar(&StartMining, "mine", false, "start dagger mining")
 	flag.BoolVar(&NonInteractive, "y", false, "non-interactive mode (say yes to confirmations)")
 	flag.BoolVar(&UseSeed, "seed", true, "seed peers")
 	flag.BoolVar(&GenAddr, "genaddr", false, "create a new priv/pub key")
 	flag.BoolVar(&ExportKey, "export", false, "export private key")
 	flag.StringVar(&LogFile, "logfile", "", "log file (defaults to standard output)")
 	flag.StringVar(&ImportKey, "import", "", "imports the given private key (hex)")
+	flag.StringVar(&Datadir, "datadir", defaultDataDir(), "specifies the datadir to use")
+	flag.StringVar(&ConfigFile, "conf", defaultConfigFile, "config file")
+	flag.StringVar(&DebugFile, "debug", "", "debug file (no debugging if not set)")
+	flag.IntVar(&LogLevel, "loglevel", int(ethlog.InfoLevel), "loglevel: 0-4: silent,error,warn,info,debug)")
 
-	flag.StringVar(&Datadir, "datadir", ".ethereum", "specifies the datadir to use. Takes precedence over config file.")
+	flag.BoolVar(&StartMining, "mine", false, "start dagger mining")
+	flag.BoolVar(&StartJsConsole, "js", false, "launches javascript console")
 
 	flag.Parse()
 
diff --git a/ethereum/main.go b/ethereum/main.go
new file mode 100644
index 000000000..bbbaf5541
--- /dev/null
+++ b/ethereum/main.go
@@ -0,0 +1,47 @@
+package main
+
+import (
+	"github.com/ethereum/go-ethereum/utils"
+	"github.com/ethereum/eth-go/ethlog"
+	"runtime"
+)
+
+var logger = ethlog.NewLogger("CLI")
+
+func main() {
+	runtime.GOMAXPROCS(runtime.NumCPU())
+
+	// precedence: code-internal flag default < config file < environment variables < command line
+	Init() // parsing command line
+	utils.InitConfig(ConfigFile, Datadir, Identifier, "ETH")
+
+	utils.InitDataDir(Datadir)
+
+	utils.InitLogging(Datadir, LogFile, LogLevel, DebugFile)
+
+	ethereum := utils.NewEthereum(UseUPnP, OutboundPort, MaxPeer)
+
+	// create, import, export keys
+  utils.KeyTasks(GenAddr, ImportKey, ExportKey, NonInteractive)
+
+  if ShowGenesis {
+    utils.ShowGenesis(ethereum)
+  }
+
+	if StartMining {
+		utils.StartMining(ethereum)
+	}
+
+	// better reworked as cases
+	if StartJsConsole {
+		InitJsConsole(ethereum)
+	} else if len(InputFile) > 0 {
+		ExecJsFile(ethereum, InputFile)
+	}
+
+	if StartRpc {
+		utils.StartRpc(ethereum, RpcPort)
+	}
+
+	utils.StartEthereum(ethereum, UseSeed)
+}