add config-file flag to ocis, propagate log config to graph & graph-explorer

ocis/pkg/command/root.go

@@ -46,14 +46,6 @@ func Execute() error {
 		)
 	}
 
-	//r := registry.GetRegistry()
-
-	//opts := micro.Options{
-	//	Registry: r,
-	//}
-
-	//runtime.AddMicroPlatform(app, opts)
-
 	cli.HelpFlag = &cli.BoolFlag{
 		Name:  "help,h",
 		Usage: "Show the help",

ocis/pkg/flagset/flagset.go

@@ -8,6 +8,12 @@ import (
 // RootWithConfig applies cfg to the root flagset
 func RootWithConfig(cfg *config.Config) []cli.Flag {
 	return []cli.Flag{
+		&cli.StringFlag{
+			Name:        "config-file",
+			Usage:       "Load config file from a non standard location.",
+			EnvVars:     []string{"OCIS_CONFIG_FILE"},
+			Destination: &cfg.File,
+		},
 		&cli.StringFlag{
 			Name:        "ocis-log-level",
 			Value:       "info",