suport for ocs

ocs/pkg/command/root.go

@@ -63,6 +63,7 @@ func NewLogger(cfg *config.Config) log.Logger {
 		log.Level(cfg.Log.Level),
 		log.Pretty(cfg.Log.Pretty),
 		log.Color(cfg.Log.Color),
+		log.File(cfg.Log.File),
 	)
 }
 
@@ -121,6 +122,7 @@ func NewSutureService(cfg *ociscfg.Config) suture.Service {
 	if cfg.Mode == 0 {
 		cfg.OCS.Supervised = true
 	}
+	cfg.OCS.Log.File = cfg.Log.File
 	return SutureService{
 		cfg: cfg.OCS,
 	}

ocs/pkg/config/config.go

@@ -7,6 +7,7 @@ type Log struct {
 	Level  string
 	Pretty bool
 	Color  bool
+	File   string
 }
 
 // Debug defines the available debug configuration.

ocs/pkg/flagset/flagset.go

@@ -22,6 +22,12 @@ func HealthWithConfig(cfg *config.Config) []cli.Flag {
 // ServerWithConfig applies cfg to the root flagset
 func ServerWithConfig(cfg *config.Config) []cli.Flag {
 	return []cli.Flag{
+		&cli.StringFlag{
+			Name:        "log-file",
+			Usage:       "Enable log to file",
+			EnvVars:     []string{"OCS_LOG_FILE", "OCIS_LOG_FILE"},
+			Destination: &cfg.Log.File,
+		},
 		&cli.StringFlag{
 			Name:        "log-level",
 			Usage:       "Set logging level",