all: disable log message colors outside of geth

Also tweak behaviour so colors are only enabled when stderr is a terminal.

cmd/bootnode/main.go

@@ -50,7 +50,7 @@ func main() {
 	)
 	flag.Parse()
 
-	glogger := log.NewGlogHandler(log.StreamHandler(os.Stderr, log.TerminalFormat()))
+	glogger := log.NewGlogHandler(log.StreamHandler(os.Stderr, log.TerminalFormat(false)))
 	glogger.Verbosity(log.Lvl(*verbosity))
 	glogger.Vmodule(*vmodule)
 	log.Root().SetHandler(glogger)

cmd/evm/main.go

@@ -112,7 +112,7 @@ func init() {
 }
 
 func run(ctx *cli.Context) error {
-	glogger := log.NewGlogHandler(log.StreamHandler(os.Stderr, log.TerminalFormat()))
+	glogger := log.NewGlogHandler(log.StreamHandler(os.Stderr, log.TerminalFormat(false)))
 	glogger.Verbosity(log.Lvl(ctx.GlobalInt(VerbosityFlag.Name)))
 	log.Root().SetHandler(glogger)
 

cmd/wnode/main.go

@@ -152,7 +152,7 @@ func echo() {
 }
 
 func initialize() {
-	log.Root().SetHandler(log.LvlFilterHandler(log.Lvl(*argVerbosity), log.StreamHandler(os.Stderr, log.TerminalFormat())))
+	log.Root().SetHandler(log.LvlFilterHandler(log.Lvl(*argVerbosity), log.StreamHandler(os.Stderr, log.TerminalFormat(false))))
 
 	done = make(chan struct{})
 	var peers []*discover.Node

eth/protocol_test.go

@@ -30,7 +30,7 @@ import (
 )
 
 func init() {
-	// log.Root().SetHandler(log.LvlFilterHandler(log.LvlTrace, log.StreamHandler(os.Stderr, log.TerminalFormat())))
+	// log.Root().SetHandler(log.LvlFilterHandler(log.LvlTrace, log.StreamHandler(os.Stderr, log.TerminalFormat(false))))
 }
 
 var testAccount, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")

internal/debug/flags.go

@@ -18,12 +18,15 @@ package debug
 
 import (
 	"fmt"
+	"io"
 	"net/http"
 	_ "net/http/pprof"
 	"os"
 	"runtime"
 
 	"github.com/ethereum/go-ethereum/log"
+	"github.com/ethereum/go-ethereum/log/term"
+	colorable "github.com/mattn/go-colorable"
 	"gopkg.in/urfave/cli.v1"
 )
 
@@ -87,16 +90,22 @@ var Flags = []cli.Flag{
 	memprofilerateFlag, blockprofilerateFlag, cpuprofileFlag, traceFlag,
 }
 
-// glogger is the glog handler used by Geth, allowing the debug APIs to modify
-// verbosity levels, vmodules and backtrace locations.
-var glogger = log.NewGlogHandler(log.StreamHandler(os.Stderr, log.TerminalFormat()))
+var glogger *log.GlogHandler
+
+func init() {
+	usecolor := term.IsTty(os.Stderr.Fd()) && os.Getenv("TERM") != "dumb"
+	output := io.Writer(os.Stderr)
+	if usecolor {
+		output = colorable.NewColorableStderr()
+	}
+	glogger = log.NewGlogHandler(log.StreamHandler(output, log.TerminalFormat(usecolor)))
+}
 
 // Setup initializes profiling and logging based on the CLI flags.
 // It should be called as early as possible in the program.
 func Setup(ctx *cli.Context) error {
 	// logging
 	log.PrintOrigins(ctx.GlobalBool(debugFlag.Name))
-
 	glogger.Verbosity(log.Lvl(ctx.GlobalInt(verbosityFlag.Name)))
 	glogger.Vmodule(ctx.GlobalString(vmoduleFlag.Name))
 	glogger.BacktraceAt(ctx.GlobalString(backtraceAtFlag.Name))

log/format.go

@@ -69,22 +69,24 @@ func (f formatFunc) Format(r *Record) []byte {
 //
 //     [May 16 20:58:45] [DBUG] remove route ns=haproxy addr=127.0.0.1:50002
 //
-func TerminalFormat() Format {
+func TerminalFormat(usecolor bool) Format {
 	return FormatFunc(func(r *Record) []byte {
 		var color = 0
-		switch r.Lvl {
-		case LvlCrit:
-			color = 35
-		case LvlError:
-			color = 31
-		case LvlWarn:
-			color = 33
-		case LvlInfo:
-			color = 32
-		case LvlDebug:
-			color = 36
-		case LvlTrace:
-			color = 34
+		if usecolor {
+			switch r.Lvl {
+			case LvlCrit:
+				color = 35
+			case LvlError:
+				color = 31
+			case LvlWarn:
+				color = 33
+			case LvlInfo:
+				color = 32
+			case LvlDebug:
+				color = 36
+			case LvlTrace:
+				color = 34
+			}
 		}
 
 		b := &bytes.Buffer{}

mobile/init.go

@@ -27,7 +27,7 @@ import (
 
 func init() {
 	// Initialize the logger
-	log.Root().SetHandler(log.LvlFilterHandler(log.LvlInfo, log.StreamHandler(os.Stderr, log.TerminalFormat())))
+	log.Root().SetHandler(log.LvlFilterHandler(log.LvlInfo, log.StreamHandler(os.Stderr, log.TerminalFormat(false))))
 
 	// Initialize the goroutine count
 	runtime.GOMAXPROCS(runtime.NumCPU())

mobile/logger.go

@@ -24,5 +24,5 @@ import (
 
 // SetVerbosity sets the global verbosity level (between 0 and 6 - see logger/verbosity.go).
 func SetVerbosity(level int) {
-	log.Root().SetHandler(log.LvlFilterHandler(log.Lvl(level), log.StreamHandler(os.Stderr, log.TerminalFormat())))
+	log.Root().SetHandler(log.LvlFilterHandler(log.Lvl(level), log.StreamHandler(os.Stderr, log.TerminalFormat(false))))
 }

p2p/server_test.go

@@ -31,7 +31,7 @@ import (
 )
 
 func init() {
-	// log.Root().SetHandler(log.LvlFilterHandler(log.LvlError, log.StreamHandler(os.Stderr, log.TerminalFormat())))
+	// log.Root().SetHandler(log.LvlFilterHandler(log.LvlError, log.StreamHandler(os.Stderr, log.TerminalFormat(false))))
 }
 
 type testTransport struct {

swarm/network/syncdb_test.go

@@ -31,7 +31,7 @@ import (
 )
 
 func init() {
-	log.Root().SetHandler(log.LvlFilterHandler(log.LvlCrit, log.StreamHandler(os.Stderr, log.TerminalFormat())))
+	log.Root().SetHandler(log.LvlFilterHandler(log.LvlCrit, log.StreamHandler(os.Stderr, log.TerminalFormat(false))))
 }
 
 type testSyncDb struct {

tests/util.go

@@ -41,7 +41,7 @@ var (
 )
 
 func init() {
-	log.Root().SetHandler(log.LvlFilterHandler(log.LvlCrit, log.StreamHandler(os.Stderr, log.TerminalFormat())))
+	log.Root().SetHandler(log.LvlFilterHandler(log.LvlCrit, log.StreamHandler(os.Stderr, log.TerminalFormat(false))))
 	if os.Getenv("JITVM") == "true" {
 		ForceJit = true
 		EnableJit = true