Extremely basic mode

.dir-locals.el

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+((nil . ((geiser-default-implementation . lips)
+         (geiser-active-implementations . (lips)))))

README.org

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+#+title: geiser-lips
+
+Geiser support for [[https://lips.js.org/][LIPS scheme]].
+
+Currently requires a local NodeJS install of LIPS: ~npm install -g lips@beta~.
+
+This doesn't actually support any useful geiser feature currently, it's just enough to work with LIPS text files.

geiser-lips.el

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+;;; geiser-lips.el --- Interop between geiser and LIPS -*- lexical-binding: t -*-
+
+;; This file is not part of GNU Emacs
+
+;; This program is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+
+;;; Commentary:
+
+;;; Code:
+
+(require 'geiser-eval)
+(require 'geiser)
+
+(defgroup geiser-lips nil
+  "Customisations for geiser-lips."
+  :group 'geiser)
+
+(defcustom geiser-lips-binary "lips"
+  "The path to the Lips interpreter binary."
+  :type 'string)
+
+(defcustom geiser-lips-args '()
+  "Arguments to pass to the Lips interpreter."
+  :type '(list string))
+
+(defun geiser-lips--parameters ()
+  "Return all args for the Lips interpreter."
+  geiser-lips-args)
+
+(defun geiser-lips--exit-cmd ()
+  "Return the exit command."
+  "(exit)")
+
+(defun geiser-lips--startup (remote)
+  "Startup function, potentially for REMOTE."
+  #t)
+
+(defconst geiser-lips--prompt-rx "^")
+
+(defconst geiser-lips--unsupported-procs
+  '("macroexpand" "completions" "module-completions" "find-file" "symbol-location"
+    "module-location" "symbol-documentation" "module-exports" "autodoc" "callers"
+    "callees" "generic-methods")
+  "All currently unsupported procedures.")
+
+(defun geiser-lips--geiser-proc (proc &rest args)
+  "Send a string to the REPL to execute PROC with ARGS."
+  (let ((format (mapconcat #'identity args " ")))
+    (format "(eval '(geiser:%s %s))" proc args)))
+
+(define-geiser-implementation lips
+			      (binary geiser-lips-binary)
+			      (arglist geiser-lips--parameters)
+			      (exit-command geiser-lips--exit-cmd)
+			      (repl-startup geiser-lips--startup)
+			      (prompt-regexp geiser-lips--prompt-rx)
+			      (unsupported-procedures geiser-lips--unsupported-procs)
+			      (marshall-procedure geiser-lips--geiser-proc))
+
+(provide 'geiser-lips)
+
+;;; geiser-lips.el ends here