config from env and log to file

cmd/cli/main.go

@@ -64,6 +64,10 @@ func setupDI() cli.BeforeFunc {
 		}
 
 		cfgpath := cmd.String("config")
+		if cfgpath == "" {
+			return errors.New("no config path provided")
+		}
+
 		debugLevel := cmd.Bool("verbose")
 		jsonFormat := cmd.Bool("json")
 
@@ -96,9 +100,12 @@ func setupCLI() *cli.Command {
 		Version:     fmt.Sprintf("%s (%s) %s", rooteway.Version(), rooteway.Commit(), rooteway.BuildTime()),
 		Flags: []cli.Flag{
 			&cli.StringFlag{
-				Name:      "config",
-				Usage:     "path to config in TOML format",
-				Value:     "config.toml",
+				Name:  "config",
+				Usage: "path to config in TOML format",
+				Value: "config.toml",
+				Sources: cli.NewValueSourceChain(
+					cli.EnvVar("EWAY_CONFIG"),
+				),
 				TakesFile: true,
 			},
 			&cli.BoolFlag{