Remove unused components

- remove graceful context
- remove logger component

Signed-off-by: Evgeniy Kulikov <kim@nspcc.ru>

cmd/gate/app-graceful.go

@@ -1,24 +0,0 @@
-package main
-
-import (
-	"context"
-	"os"
-	"os/signal"
-	"syscall"
-
-	"go.uber.org/zap"
-)
-
-// newGracefulContext returns graceful context
-func newGracefulContext(l *zap.Logger) context.Context {
-	ctx, cancel := context.WithCancel(context.Background())
-	go func() {
-		ch := make(chan os.Signal, 1)
-		signal.Notify(ch, syscall.SIGINT, syscall.SIGTERM, syscall.SIGHUP)
-		sig := <-ch
-		l.Info("received signal",
-			zap.String("signal", sig.String()))
-		cancel()
-	}()
-	return ctx
-}

cmd/gate/app-logger.go

@@ -1,142 +0,0 @@
-package main
-
-import (
-	"strings"
-
-	"github.com/spf13/viper"
-	"go.uber.org/zap"
-	"go.uber.org/zap/zapcore"
-	"google.golang.org/grpc/grpclog"
-)
-
-type (
-	zapLogger struct {
-		zapcore.Core
-		log *zap.SugaredLogger
-	}
-
-	logger interface {
-		grpclog.LoggerV2
-		Println(v ...interface{})
-	}
-)
-
-const (
-	formatJSON    = "json"
-	formatConsole = "console"
-
-	defaultSamplingInitial    = 100
-	defaultSamplingThereafter = 100
-)
-
-func gRPCLogger(l *zap.Logger) logger {
-	log := l.WithOptions(
-		// skip gRPCLog + zapLogger in caller
-		zap.AddCallerSkip(2))
-	return &zapLogger{
-		Core: log.Core(),
-		log:  log.Sugar(),
-	}
-}
-
-func safeLevel(lvl string) zap.AtomicLevel {
-	switch strings.ToLower(lvl) {
-	case "debug":
-		return zap.NewAtomicLevelAt(zap.DebugLevel)
-	case "warn":
-		return zap.NewAtomicLevelAt(zap.WarnLevel)
-	case "error":
-		return zap.NewAtomicLevelAt(zap.ErrorLevel)
-	case "fatal":
-		return zap.NewAtomicLevelAt(zap.FatalLevel)
-	case "panic":
-		return zap.NewAtomicLevelAt(zap.PanicLevel)
-	default:
-		return zap.NewAtomicLevelAt(zap.InfoLevel)
-	}
-}
-
-func newLogger(v *viper.Viper) *zap.Logger {
-	c := zap.NewProductionConfig()
-
-	c.OutputPaths = []string{"stdout"}
-	c.ErrorOutputPaths = []string{"stdout"}
-
-	if v.IsSet("logger.sampling") {
-		c.Sampling = &zap.SamplingConfig{
-			Initial:    defaultSamplingInitial,
-			Thereafter: defaultSamplingThereafter,
-		}
-
-		if val := v.GetInt(cfgLoggerSamplingInitial); val > 0 {
-			c.Sampling.Initial = val
-		}
-
-		if val := v.GetInt(cfgLoggerSamplingThereafter); val > 0 {
-			c.Sampling.Thereafter = val
-		}
-	}
-
-	// logger level
-	c.Level = safeLevel(v.GetString(cfgLoggerLevel))
-	traceLvl := safeLevel(v.GetString(cfgLoggerTraceLevel))
-
-	// logger format
-	switch f := v.GetString(cfgLoggerFormat); strings.ToLower(f) {
-	case formatConsole:
-		c.Encoding = formatConsole
-	default:
-		c.Encoding = formatJSON
-	}
-
-	// logger time
-	c.EncoderConfig.EncodeTime = zapcore.ISO8601TimeEncoder
-
-	l, err := c.Build(
-		// enable trace only for current log-level
-		zap.AddStacktrace(traceLvl))
-	if err != nil {
-		panic(err)
-	}
-
-	if v.GetBool(cfgLoggerNoDisclaimer) {
-		return l
-	}
-
-	name := v.GetString(cfgApplicationName)
-	version := v.GetString(cfgApplicationVersion)
-
-	return l.With(
-		zap.String("app_name", name),
-		zap.String("app_version", version))
-}
-
-func (z *zapLogger) Info(args ...interface{}) { z.log.Info(args...) }
-
-func (z *zapLogger) Infoln(args ...interface{}) { z.log.Info(args...) }
-
-func (z *zapLogger) Infof(format string, args ...interface{}) { z.log.Infof(format, args...) }
-
-func (z *zapLogger) Println(args ...interface{}) { z.log.Info(args...) }
-
-func (z *zapLogger) Printf(format string, args ...interface{}) { z.log.Infof(format, args...) }
-
-func (z *zapLogger) Warning(args ...interface{}) { z.log.Warn(args...) }
-
-func (z *zapLogger) Warningln(args ...interface{}) { z.log.Warn(args...) }
-
-func (z *zapLogger) Warningf(format string, args ...interface{}) { z.log.Warnf(format, args...) }
-
-func (z *zapLogger) Error(args ...interface{}) { z.log.Error(args...) }
-
-func (z *zapLogger) Errorln(args ...interface{}) { z.log.Error(args...) }
-
-func (z *zapLogger) Errorf(format string, args ...interface{}) { z.log.Errorf(format, args...) }
-
-func (z *zapLogger) Fatal(args ...interface{}) { z.log.Fatal(args...) }
-
-func (z *zapLogger) Fatalln(args ...interface{}) { z.log.Fatal(args...) }
-
-func (z *zapLogger) Fatalf(format string, args ...interface{}) { z.Fatalf(format, args...) }
-
-func (z *zapLogger) V(int) bool { return z.Enabled(zapcore.DebugLevel) }