# How to run REPL in command-line Racket with another language?
**URL:** https://racket.discourse.group/t/how-to-run-repl-in-command-line-racket-with-another-language/1848
**Category:** Questions & Answers
**Created:** [March 30, 2023, 6:41pm UTC](https://racket.discourse.group/t/how-to-run-repl-in-command-line-racket-with-another-language/1848 "2023-03-30T18:41:00Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@Kalimehtar](https://racket.discourse.group/u/Kalimehtar)
#### Post date: [March 30, 2023, 6:41pm UTC](https://racket.discourse.group/t/how-to-run-repl-in-command-line-racket-with-another-language/1848/1 "2023-03-30T18:41:00Z")
In DrRacket I can simply set #lang basic-demo-3, then in REPL say
```scheme
> let x = 5
> print x
5
```
In command line I tried
```scheme
racket -I basic-demo-3
```
but it doesn't work.
```scheme
$ racket -I basic-demo-3
Welcome to Racket v8.7 [cs].
> let x = 5
; let: undefined;
; cannot reference an identifier before its definition
; in module: top-level
; [,bt for context]
> ; x: undefined;
; cannot reference an identifier before its definition
; in module: top-level
; [,bt for context]
> ; =: undefined;
; cannot reference an identifier before its definition
; in module: top-level
; [,bt for context]
> 5
>
```
---
### Author:  [@sorawee](https://racket.discourse.group/u/sorawee)
#### Post date: [March 30, 2023, 7:55pm UTC](https://racket.discourse.group/t/how-to-run-repl-in-command-line-racket-with-another-language/1848/2 "2023-03-30T19:55:40Z")
My understanding is that using a non sexp reader in the command-line REPL is a relatively new feature ([https://docs.racket-lang.org/reference/interaction-info.html](https://docs.racket-lang.org/reference/interaction-info.html), added in Racket 8.3). So far, Rhombus ([https://github.com/racket/rhombus-prototype/blob/master/rhombus/private/runtime-config.rkt](https://github.com/racket/rhombus-prototype/blob/master/rhombus/private/runtime-config.rkt)) seems to be the only language that uses this feature.
Chance is that this basic-demo-3 doesn't support the command-line REPL.
Note that DrRacket REPL has the capability to support a non sexp reader if the language cooperates. So you might want to try that.
---
### Author:  [@Kalimehtar](https://racket.discourse.group/u/Kalimehtar)
#### Post date: [March 31, 2023, 3:38am UTC](https://racket.discourse.group/t/how-to-run-repl-in-command-line-racket-with-another-language/1848/3 "2023-03-31T03:38:08Z")
But it supports: [Beautiful Racket: Closing the loop: basic](https://beautifulracket.com/basic-3/the-repl.html#a_aEkiA)
>
> Note that DrRacket REPL has the capability to support a non sexp reader if the language cooperates. So you might want to try that.
The same code works in DrRacket, but I cannot use DrRacket in text mode.
---
### Author:  [@Kalimehtar](https://racket.discourse.group/u/Kalimehtar)
#### Post date: [April 15, 2023, 10:21am UTC](https://racket.discourse.group/t/how-to-run-repl-in-command-line-racket-with-another-language/1848/4 "2023-04-15T10:21:36Z")
> So far, Rhombus
Could you show, how to user Rhombus in text-mode Racket?
---
### Author:  [@samth](https://racket.discourse.group/u/samth)
#### Post date: [April 17, 2023, 2:10pm UTC](https://racket.discourse.group/t/how-to-run-repl-in-command-line-racket-with-another-language/1848/5 "2023-04-17T14:10:32Z")
You can run `racket -I rhombus` after installing the `rhombus-prototype` package.
---
### Author:  [@Kalimehtar](https://racket.discourse.group/u/Kalimehtar)
#### Post date: [August 26, 2023, 7:01pm UTC](https://racket.discourse.group/t/how-to-run-repl-in-command-line-racket-with-another-language/1848/6 "2023-08-26T19:01:04Z")
I have found. One need to write `configure-expand` submodule for console Racket.
>
---
### Author:  [@wurmli](https://racket.discourse.group/u/wurmli)
#### Post date: [August 27, 2023, 3:21am UTC](https://racket.discourse.group/t/how-to-run-repl-in-command-line-racket-with-another-language/1848/7 "2023-08-27T03:21:56Z")
If you want to use the "basic" language from Beautiful Racket in the command-line REPL, you need to require "setup.rkt" and "elements.rkt" and provide the bindings of "elements.rkt" as well as #%top-interaction #%app #%top #%datum to the expander macro "b-module-begin" in "expander.rkt". If you change the xrepl to use readline, you can enter basic expressions in the REPL, have them be evaluated and use REPL-history. Coloring doesn't work.
```scheme
; "expander.rkt"
#lang br/quicklang
(require "struct.rkt" "run.rkt" "elements.rkt" "setup.rkt")
(provide (rename-out [b-module-begin #%module-begin])
(all-from-out "elements.rkt"))
(define-macro (b-module-begin (b-program LINE ...))
(with-pattern
([((b-line NUM STMT ...) ...) #'(LINE ...)]
[(LINE-FUNC ...) (prefix-id "line-" #'(NUM ...))]
[(VAR-ID ...) (find-property 'b-id #'(LINE ...))]
[(IMPORT-NAME ...)
(find-property 'b-import-name #'(LINE ...))]
[(EXPORT-NAME ...)
(find-property 'b-export-name #'(LINE ...))]
[((SHELL-ID SHELL-IDX) ...)
(make-shell-ids-and-idxs caller-stx)]
[(UNIQUE-ID ...)
(unique-ids
(syntax->list #'(VAR-ID ... SHELL-ID ...)))])
#'(#%module-begin
(module configure-runtime br
(require basic/setup)
(do-setup!))
;;;;;;;;;;;;;;;;; this is added! ;;;;;;;;;;;;;;;;;;;;;;;
(require
"setup.rkt"
"elements.rkt")
(provide
(all-from-out "elements.rkt")
#%top-interaction #%app #%top #%datum)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(require IMPORT-NAME) ...
(provide EXPORT-NAME ...)
(define UNIQUE-ID 0) ...
(let ([clargs (current-command-line-arguments)])
(set! SHELL-ID (get-clarg clargs SHELL-IDX)) ...)
LINE ...
(define line-table
(apply hasheqv (append (list NUM LINE-FUNC) ...)))
(parameterize
([current-output-port (basic-output-port)])
(void (run line-table))))))
(define (get-clarg clargs idx)
(if (<= (vector-length clargs) idx)
0
(let ([val (vector-ref clargs idx)])
(or (string->number val) val))))
(begin-for-syntax
(require racket/list)
(define (unique-ids stxs)
(remove-duplicates stxs #:key syntax->datum))
(define (find-property which line-stxs)
(unique-ids
(for/list ([stx (in-list (stx-flatten line-stxs))]
#:when (syntax-property stx which))
stx)))
(define (make-shell-ids-and-idxs ctxt)
(define arg-count 10)
(for/list ([idx (in-range arg-count)])
(list (suffix-id #'arg idx #:context ctxt) idx))))
```
```scheme
wurmli@cirrus7:~$ racket -I basic/sample
Welcome to Racket v8.10 [cs].
1
2
3
> div(7,6)
1.1666666666666667
> let z = 99
> z
99
>
```
---
### Author:  [@sorawee](https://racket.discourse.group/u/sorawee)
#### Post date: [August 27, 2023, 3:40am UTC](https://racket.discourse.group/t/how-to-run-repl-in-command-line-racket-with-another-language/1848/8 "2023-08-27T03:40:30Z")
Nice catch! I was wrong about this. I see now that `current-interaction-info` is really about “syntax coloring and indentation support” in the REPL, but the REPL functionality doesn’t require it. Using `configure-runtime` suffices.