log: removal of log-to flags

cmd/tunnel/options.go

@@ -23,7 +23,7 @@ Commands:
 
 Examples:
 	tunnel start www ssh
-	tunnel -config config.yaml -log stdout -log-level 2 start ssh
+	tunnel -config config.yaml -log-level 2 start ssh
 	tunnel start-all
 
 config.yaml:
@@ -56,7 +56,6 @@ func init() {
 
 type options struct {
 	config   string
-	logTo    string
 	logLevel int
 	version  bool
 	command  string
@@ -65,14 +64,12 @@ type options struct {
 
 func parseArgs() (*options, error) {
 	config := flag.String("config", "tunnel.yml", "Path to tunnel configuration file")
-	logTo := flag.String("log", "stdout", "Write log messages to this file, file name or 'stdout', 'stderr', 'none'")
 	logLevel := flag.Int("log-level", 1, "Level of messages to log, 0-3")
 	version := flag.Bool("version", false, "Prints tunnel version")
 	flag.Parse()
 
 	opts := &options{
 		config:   *config,
-		logTo:    *logTo,
 		logLevel: *logLevel,
 		version:  *version,
 		command:  flag.Arg(0),

cmd/tunnel/tunnel.go

@@ -34,10 +34,7 @@ func main() {
 		return
 	}
 
-	logger, err := log.NewLogger(opts.logTo, opts.logLevel)
-	if err != nil {
-		fatal("failed to init logger: %s", err)
-	}
+	logger := log.NewFilterLogger(log.NewStdLogger(), opts.logLevel)
 
 	// read configuration file
 	config, err := loadClientConfigFromFile(opts.config)

cmd/tunneld/options.go

@@ -44,7 +44,6 @@ type options struct {
 	tlsKey     string
 	rootCA     string
 	clients    string
-	logTo      string
 	logLevel   int
 	version    bool
 }
@@ -57,7 +56,6 @@ func parseArgs() *options {
 	tlsKey := flag.String("tlsKey", "server.key", "Path to a TLS key file")
 	rootCA := flag.String("rootCA", "", "Path to the trusted certificate chian used for client certificate authentication, if empty do not authenticate clients")
 	clients := flag.String("clients", "", "Comma-separated list of tunnel client ids, if empty accept all clients")
-	logTo := flag.String("log", "stdout", "Write log messages to this file, file name or 'stdout', 'stderr', 'none'")
 	logLevel := flag.Int("log-level", 1, "Level of messages to log, 0-3")
 	version := flag.Bool("version", false, "Prints tunneld version")
 	flag.Parse()
@@ -70,7 +68,6 @@ func parseArgs() *options {
 		tlsKey:     *tlsKey,
 		rootCA:     *rootCA,
 		clients:    *clients,
-		logTo:      *logTo,
 		logLevel:   *logLevel,
 		version:    *version,
 	}

cmd/tunneld/tunneld.go

@@ -28,10 +28,7 @@ func main() {
 		return
 	}
 
-	logger, err := log.NewLogger(opts.logTo, opts.logLevel)
-	if err != nil {
-		fatal("failed to init logger: %s", err)
-	}
+	logger := log.NewFilterLogger(log.NewStdLogger(), opts.logLevel)
 
 	tlsconf, err := tlsConfig(opts)
 	if err != nil {

log/log.go

@@ -4,12 +4,6 @@
 
 package log
 
-import (
-	"io"
-	"log"
-	"os"
-)
-
 // Logger is the fundamental interface for all log operations. Log creates a
 // log event from keyvals, a variadic sequence of alternating keys and values.
 // Implementations must be safe for concurrent use by multiple goroutines. In
@@ -18,30 +12,3 @@ import (
 type Logger interface {
 	Log(keyvals ...interface{}) error
 }
-
-// NewLogger returns logfmt based logger, printing messages up to log level
-// logLevel.
-func NewLogger(to string, level int) (Logger, error) {
-	var w io.Writer
-
-	switch to {
-	case "none":
-		return NewNopLogger(), nil
-	case "stdout":
-		w = os.Stdout
-	case "stderr":
-		w = os.Stderr
-	default:
-		f, err := os.Create(to)
-		if err != nil {
-			return nil, err
-		}
-		w = f
-	}
-
-	log.SetOutput(w)
-
-	l := NewStdLogger()
-	l = NewFilterLogger(l, level)
-	return l, nil
-}