Add file logger support (#269)

cmd/statusd/main.go

@@ -7,7 +7,6 @@ import (
 	"runtime"
 
 	"github.com/status-im/status-go/geth/api"
-	"github.com/status-im/status-go/geth/log"
 	"github.com/status-im/status-go/geth/params"
 	"gopkg.in/urfave/cli.v1"
 )
@@ -87,7 +86,14 @@ var (
 	LogLevelFlag = cli.StringFlag{
 		Name:  "log",
 		Usage: `Log level, one of: "ERROR", "WARN", "INFO", "DEBUG", and "TRACE"`,
-		Value: "INFO",
+		Value: "",
+	}
+
+	// LogFileFlag defines a log filename
+	LogFileFlag = cli.StringFlag{
+		Name:  "logfile",
+		Usage: `Path to the log file`,
+		Value: "",
 	}
 )
 
@@ -107,6 +113,7 @@ func init() {
 		DataDirFlag,
 		NetworkIDFlag,
 		LogLevelFlag,
+		LogFileFlag,
 	}
 	app.Before = func(ctx *cli.Context) error {
 		runtime.GOMAXPROCS(runtime.NumCPU())
@@ -151,10 +158,11 @@ func makeNodeConfig(ctx *cli.Context) (*params.NodeConfig, error) {
 
 	nodeConfig.NodeKeyFile = ctx.GlobalString(NodeKeyFileFlag.Name)
 
-	if logLevel := ctx.GlobalString(LogLevelFlag.Name); len(logLevel) > 0 {
-		nodeConfig.LogEnabled = true
+	if logLevel := ctx.GlobalString(LogLevelFlag.Name); logLevel != "" {
 		nodeConfig.LogLevel = logLevel
-		log.SetLevel(logLevel)
+	}
+	if logFile := ctx.GlobalString(LogFileFlag.Name); logFile != "" {
+		nodeConfig.LogFile = logFile
 	}
 
 	return nodeConfig, nil

cmd/statusd/utils.go

@@ -33,7 +33,6 @@ var nodeConfigJSON = `{
 	"DataDir": "` + TestDataDir + `",
 	"HTTPPort": ` + strconv.Itoa(TestConfig.Node.HTTPPort) + `,
 	"WSPort": ` + strconv.Itoa(TestConfig.Node.WSPort) + `,
-	"LogEnabled": true,
 	"LogLevel": "INFO"
 }`
 

geth/api/api_test.go

@@ -43,7 +43,6 @@ func (s *APITestSuite) TestCHTUpdate() {
 	configJSON := `{
 		"NetworkId": ` + strconv.Itoa(params.RopstenNetworkID) + `,
 		"DataDir": "` + tmpDir + `",
-		"LogEnabled": true,
 		"LogLevel": "INFO",
 		"RPCEnabled": true
 	}`

geth/log/log.go

@@ -2,16 +2,28 @@ package log
 
 import (
 	"fmt"
+	"os"
 	"strings"
 
 	"github.com/ethereum/go-ethereum/log"
 )
 
-// logger is package scope instance of log.Logger
-var logger = log.New("geth", "StatusIM")
+// Logger is a wrapper around log.Logger.
+type Logger struct {
+	log.Logger
+	Level   log.Lvl
+	Handler log.Handler
+}
+
+// logger is package scope instance of Logger
+var logger = Logger{
+	Logger:  log.New("geth", "StatusIM"),
+	Level:   log.LvlError,
+	Handler: log.StreamHandler(os.Stdout, log.TerminalFormat(true)),
+}
 
 func init() {
-	SetLevel("INFO")
+	setHandler(logger.Level, logger.Handler)
 }
 
 // SetLevel inits status and ethereum-go logging packages,
@@ -20,17 +32,36 @@ func init() {
 // Our log levels are in form "DEBUG|ERROR|WARN|etc", while
 // ethereum-go expects names in lower case: "debug|error|warn|etc".
 func SetLevel(level string) {
-	lvl, err := log.LvlFromString(strings.ToLower(level))
-	if err != nil {
-		fmt.Printf("Incorrect log level: %s, using defaults\n", level)
-		lvl = log.LvlInfo
-	}
+	lvl := levelFromString(level)
 
-	setHandler(lvl, log.StdoutHandler)
+	logger.Level = lvl
+	setHandler(lvl, logger.Handler)
 }
 
-// setHandler is a init helper that allows (re)initialization
-// with different handler. Useful for testing.
+// SetLogFile configures logger to write output into file.
+// This call preserves current logging level.
+func SetLogFile(filename string) error {
+	handler, err := log.FileHandler(filename, log.TerminalFormat(false))
+	if err != nil {
+		return err
+	}
+
+	logger.Handler = handler
+	setHandler(logger.Level, handler)
+	return nil
+}
+
+func levelFromString(level string) log.Lvl {
+	lvl, err := log.LvlFromString(strings.ToLower(level))
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Incorrect log level: %s, using defaults\n", level)
+		lvl = log.LvlInfo
+	}
+	return lvl
+}
+
+// setHandler is a helper that allows log (re)initialization
+// with different level and handler. Useful for testing.
 func setHandler(lvl log.Lvl, handler log.Handler) {
 	h := log.LvlFilterHandler(lvl, handler)
 	logger.SetHandler(h)

geth/log/log_test.go

@@ -2,9 +2,11 @@ package log
 
 import (
 	"bytes"
+	"io/ioutil"
 	"testing"
 
 	"github.com/ethereum/go-ethereum/log"
+	"github.com/stretchr/testify/require"
 )
 
 const (
@@ -44,8 +46,28 @@ func TestLogLevels(t *testing.T) {
 		Warn(warn)
 		Error(err)
 
-		if buf.String() != test.out {
-			t.Errorf("Expecting log output to be '%s', got '%s'", test.out, buf.String())
-		}
+		require.Equal(t, test.out, buf.String())
 	}
 }
+
+func TestLogFile(t *testing.T) {
+	file, err := ioutil.TempFile("", "statusim_log_test")
+	require.NoError(t, err)
+
+	defer file.Close()
+
+	// setup log
+	SetLevel("INFO")
+	SetLogFile(file.Name())
+
+	// test log output to file
+	Info(info)
+	Debug(debug)
+
+	data, err := ioutil.ReadAll(file)
+	require.NoError(t, err)
+
+	got := string(data)
+	require.Contains(t, got, info)
+	require.NotContains(t, got, debug)
+}

geth/node/manager.go

@@ -70,6 +70,8 @@ func (m *NodeManager) startNode(config *params.NodeConfig) (<-chan struct{}, err
 		return nil, ErrNodeExists
 	}
 
+	m.initLog(config)
+
 	ethNode, err := MakeNode(config)
 	if err != nil {
 		return nil, err
@@ -580,3 +582,16 @@ func (m *NodeManager) RPCServer() (*rpc.Server, error) {
 
 	return m.rpcServer, nil
 }
+
+// initLog initializes global logger parameters based on
+// provided node configurations.
+func (m *NodeManager) initLog(config *params.NodeConfig) {
+	log.SetLevel(config.LogLevel)
+
+	if config.LogFile != "" {
+		err := log.SetLogFile(config.LogFile)
+		if err != nil {
+			fmt.Println("Failed to open log file, using stdout")
+		}
+	}
+}

geth/params/config.go

@@ -287,9 +287,6 @@ type NodeConfig struct {
 	// handshake phase, counted separately for inbound and outbound connections.
 	MaxPendingPeers int
 
-	// LogToFile specified whether logs should be saved into file
-	LogEnabled bool
-
 	// LogFile is filename where exposed logs get written to
 	LogFile string
 

geth/params/defaults.go

@@ -52,10 +52,10 @@ const (
 	DatabaseCache = 16
 
 	// LogFile defines where to write logs to
-	LogFile = "geth.log"
+	LogFile = ""
 
 	// LogLevel defines the minimum log level to report
-	LogLevel = "INFO"
+	LogLevel = "ERROR"
 
 	// LogLevelSuccinct defines the log level when only errors are reported.
 	// Useful when the default INFO level becomes too verbose.

geth/params/testdata/config.mainnet.json

@@ -18,9 +18,8 @@
     "TLSEnabled": false,
     "MaxPeers": 25,
     "MaxPendingPeers": 0,
-    "LogEnabled": false,
-    "LogFile": "geth.log",
-    "LogLevel": "INFO",
+    "LogFile": "",
+    "LogLevel": "ERROR",
     "LogToStderr": true,
     "UpstreamConfig": {
         "Enabled": false,

geth/params/testdata/config.rinkeby.json

@@ -18,9 +18,8 @@
     "TLSEnabled": false,
     "MaxPeers": 25,
     "MaxPendingPeers": 0,
-    "LogEnabled": false,
-    "LogFile": "geth.log",
-    "LogLevel": "INFO",
+    "LogFile": "",
+    "LogLevel": "ERROR",
     "LogToStderr": true,
     "UpstreamConfig": {
         "Enabled": false,

geth/params/testdata/config.ropsten.json

@@ -18,9 +18,8 @@
     "TLSEnabled": false,
     "MaxPeers": 25,
     "MaxPendingPeers": 0,
-    "LogEnabled": false,
-    "LogFile": "geth.log",
-    "LogLevel": "INFO",
+    "LogFile": "",
+    "LogLevel": "ERROR",
     "LogToStderr": true,
     "UpstreamConfig": {
         "Enabled": false,

geth/testing/testing.go

@@ -11,7 +11,6 @@ import (
 
 	gethcommon "github.com/ethereum/go-ethereum/common"
 	"github.com/status-im/status-go/geth/common"
-	"github.com/status-im/status-go/geth/log"
 	"github.com/status-im/status-go/geth/params"
 	assertions "github.com/stretchr/testify/require"
 	"github.com/stretchr/testify/suite"
@@ -54,8 +53,6 @@ func init() {
 	if err != nil {
 		panic(err)
 	}
-
-	log.SetLevel("ERROR")
 }
 
 // BaseTestSuite defines a base tests suit which others suites can embedded to
@@ -131,8 +128,7 @@ func MakeTestNodeConfig(networkID int) (*params.NodeConfig, error) {
 		"DataDir": "` + filepath.Join(TestDataDir, TestNetworkNames[networkID]) + `",
 		"HTTPPort": ` + strconv.Itoa(TestConfig.Node.HTTPPort) + `,
 		"WSPort": ` + strconv.Itoa(TestConfig.Node.WSPort) + `,
-		"LogEnabled": true,
-		"LogLevel": "ERROR"
+		"LogLevel": "INFO"
 	}`
 	nodeConfig, err := params.LoadNodeConfig(configJSON)
 	if err != nil {