fix: running --shell without arguments

Author: boukeversteegh

lib/dockerized.go

@@ -151,7 +151,12 @@ func main() {
 
 		runOptions.Environment = append(runOptions.Environment, "PS1="+ps1)
 		runOptions.Entrypoint = []string{"/bin/sh"}
-		runOptions.Command = []string{"-c", fmt.Sprintf("%s; %s \"%s\"", cmdPrintWelcome, cmdLaunchShell, strings.Join(commandArgs, "\" \""))}
+
+		if len(commandArgs) > 0 {
+			runOptions.Command = []string{"-c", fmt.Sprintf("%s; %s \"%s\"", cmdPrintWelcome, cmdLaunchShell, strings.Join(commandArgs, "\" \""))}
+		} else {
+			runOptions.Command = []string{"-c", fmt.Sprintf("%s; %s", cmdPrintWelcome, cmdLaunchShell)}
+		}
 	}
 
 	if !contains(project.ServiceNames(), commandName) {