From e69994959bbf2132cca1439e3a46bfdd4d151413 Mon Sep 17 00:00:00 2001
From: mathieu2em <math.per@hotmail.com>
Date: Thu, 4 Jul 2019 13:34:40 -0400
Subject: WIP gambit support first draft

---
 elisp/geiser-gambit.el          | 318 ++++++++++++++++++++++++++++++++++++++++
 elisp/geiser-impl.el            |   2 +-
 scheme/gambit/geiser/gambit.scm |   4 +
 3 files changed, 323 insertions(+), 1 deletion(-)
 create mode 100644 elisp/geiser-gambit.el
 create mode 100644 scheme/gambit/geiser/gambit.scm

diff --git a/elisp/geiser-gambit.el b/elisp/geiser-gambit.el
new file mode 100644
index 0000000..cee1e03
--- /dev/null
+++ b/elisp/geiser-gambit.el
@@ -0,0 +1,318 @@
+;; geiser-gambit.el -- gambit's implementation of the geiser protocols
+
+;; Copyright (C) 2014, 2015, 2019 Daniel Leslie
+
+;; Based on geiser-guile.el by Jose Antonio Ortega Ruiz
+
+;; This program is free software; you can redistribute it and/or
+;; modify it under the terms of the Modified BSD License. You should
+;; have received a copy of the license along with this program. If
+;; not, see <http://www.xfree86.org/3.3.6/COPYRIGHT2.html#5>.
+
+;; Start date: Sun Mar 08, 2009 23:03
+
+;; Gambit in geiser, thank you to Chris Blom for the start he did few years ago
+;; https://github.com/ChrisBlom
+
+(require 'geiser-connection)
+(require 'geiser-syntax)
+(require 'geiser-custom)
+(require 'geiser-base)
+(require 'geiser-eval)
+(require 'geiser-edit)
+(require 'geiser-log)
+(require 'geiser)
+
+(require 'compile)
+(require 'info-look)
+
+(eval-when-compile (require 'cl))
+
+(defconst geiser-gambit-builtin-keywords
+  '("##debug-repl"))
+
+;;; Customization
+
+(defgroup geiser-gambit nil
+  "Customization for Geiser's Gambit flavour."
+  :group 'geiser)
+
+;; define the interpretor for geiser.
+;; the geiser-costum--defcustom is a macro that will
+;; call a declaration into the documentation of the
+;; structure of the methode and then define the method
+;; with a defcustom: define a variable that represents an option users might want to set
+(geiser-custom--defcustom geiser-gambit-binary
+  (cond ((eq system-type 'windows-nt) '("gsi.exe")) ;; not sure if the -:c is ok here
+        ((eq system-type 'darwin) "gsi")
+        (t "gsi"))
+  "Name to use to call the gambit executable when starting a REPL."
+  :type '(choice string (repeat string))
+  :group 'geiser-gambit)
+
+(geiser-custom--defcustom geiser-gambit-load-path nil
+  "A list of paths to be added to gambit's load path when it's
+started."
+  :type '(repeat file)
+  :group 'geiser-gambit)
+
+(geiser-custom--defcustom geiser-gambit-compile-geiser-p t
+  "Non-nil means that the Geiser runtime will be compiled on load."
+  :type 'boolean
+  :group 'geiser-gambit)
+
+(geiser-custom--defcustom geiser-gambit-init-file "~/.gambit-geiser"
+  "Initialization file with user code for the Gambit REPL.
+If all you want is to load ~/.gambit, set
+`geiser-gambit-load-init-file-p' instead."
+  :type 'string
+  :group 'geiser-gambit)
+
+(geiser-custom--defcustom geiser-gambit-load-init-file-p nil
+  "Whether to load ~/.gambit when starting Gambit.
+Note that, due to peculiarities in the way Gambit loads its init
+file, using `geiser-gambit-init-file' is not equivalent to setting
+this variable to t."
+  :type 'boolean
+  :group 'geiser-gambit)
+
+(geiser-custom--defcustom geiser-gambit-extra-keywords nil
+  "Extra keywords highlighted in gambit scheme buffers."
+  :type '(repeat string)
+  :group 'geiser-gambit)
+
+(geiser-custom--defcustom geiser-gambit-case-sensitive-p t
+  "Non-nil means keyword highlighting is case-sensitive."
+  :type 'boolean
+  :group 'geiser-gambit)
+
+
+
+;; TODO path for debugger and debugging functions
+
+
+;;; REPL support:
+
+(defun geiser-gambit--binary ()
+  (if (listp geiser-gambit-binary)
+      (car geiser-gambit-binary)
+    geiser-gambit-binary))
+
+;;(defun geiser-gambit--parameters ()
+;;  "Return a list with all parameters needed to start Gambit.
+;;This function uses `geiser-gambit-init-file' if it exists."
+;;;;  (let ((init-file (and (stringp geiser-gambit-init-file)
+;;;;                        (expand-file-name geiser-gambit-init-file)))
+;;;;        (n-flags (and (not geiser-gambit-load-init-file-p) '("-n"))))
+;;;;  `(,@(and (listp geiser-gambit-binary) (cdr geiser-gambit-binary))
+;;;;    ,@n-flags "-include-path" ,(expand-file-name "gambit/" geiser-scheme-dir)
+;;;;    ,@(apply 'append (mapcar (lambda (p) (list "-include-path" p))
+;;;;                             geiser-gambit-load-path))
+;;;;    ,@(and init-file (file-readable-p init-file) (list init-file)))))
+;;  `("-I" ,(expand-file-name "gambit/geiser/" geiser-scheme-dir)))
+
+(defun geiser-gambit--parameters () '("-:d-")) ;; uses -:d to pipe to stdin and stdout
+
+(defconst geiser-gambit--prompt-regexp "[0-9]*> ")
+
+;;; Evaluation support:
+(defun geiser-gambit--geiser-procedure (proc &rest args)
+  (let ((fmt
+         (case proc
+           ((eval compile)
+            (let ((form (mapconcat 'identity (cdr args) " ")))
+              (format ",geiser-eval %s %s" (or (car args) "#f") form)))
+           ((load-file compile-file)
+            (format ",geiser-load-file %s" (car args)))
+           ((no-values)
+            ",geiser-no-values")
+           (t
+            (let ((form (mapconcat 'identity args " ")))
+              (format "(geiser-%s %s)" proc form))))))
+    ;;(message fmt)
+    fmt))
+
+(defconst geiser-gambit--module-re
+  "( *module +\\(([^)]+)\\|[^ ]+\\)\\|( *define-library +\\(([^)]+)\\|[^ ]+\\)")
+
+(defun geiser-gambit--module-cmd (module fmt &optional def)
+  (when module
+    (let* ((module (geiser-gambit--get-module module))
+           (module (cond ((or (null module) (eq module :f)) def)
+                         (t (format "%s" module)))))
+      (and module (format fmt module)))))
+
+(defun geiser-gambit--get-module (&optional module)
+  (cond ((null module)
+         (save-excursion
+           (geiser-syntax--pop-to-top)
+           (if (or (re-search-backward geiser-gambit--module-re nil t)
+                   (looking-at geiser-gambit--library-re)
+                   (re-search-forward geiser-gambit--module-re nil t))
+               (geiser-gambit--get-module (match-string-no-properties 1))
+             :f)))
+        ((listp module) module)
+        ((stringp module)
+         (condition-case nil
+             (car (geiser-syntax--read-from-string module))
+           (error :f)))
+        (t :f)))
+
+(defun geiser-gambit--import-command (module)
+  (geiser-gambit--module-cmd module ",use %s"))
+
+(defun geiser-gambit--enter-command (module)
+  (geiser-gambit--module-cmd module ",m %s" module))
+
+(defun geiser-gambit--exit-command () ",q")
+
+(defun geiser-gambit--symbol-begin (module)
+  (save-excursion (skip-syntax-backward "^-()>") (point)))
+
+(defun geiser-gambit--version (binary)
+  (car (process-lines binary "-c" "(display (version))")))
+
+(defun connect-to-gambit ()
+  "Start a gambit REPL connected to a remote process."
+  (interactive)
+  (geiser-connect 'gambit))
+
+;; error display
+
+;;; Error display
+
+(defun geiser-gambit--display-error (module key msg)
+  (newline)
+  (when (stringp msg)
+    (save-excursion (insert msg))
+    (geiser-edit--buttonize-files))
+  (and (not key) msg (not (zerop (length msg)))))
+
+;;; Trying to ascertain whether a buffer is Gambit Scheme:
+
+(defconst geiser-gambit--guess-re
+  (regexp-opt (append '("gsi" "gambit") geiser-gambit-builtin-keywords)))
+
+(defun geiser-gambit--guess ()
+  (save-excursion
+    (goto-char (point-min))
+    (re-search-forward geiser-gambit--guess-re nil t)))
+
+(defun geiser-gambit--external-help (id module)
+  "Loads gambit doc into a buffer"
+  (browse-url (format "http://api.call-cc.org/cdoc?q=%s&query-name=Look+up" id)))
+
+;;; Keywords and syntax
+
+(defun geiser-gambit--keywords ()
+  `((,(format "[[(]%s\\>" (regexp-opt geiser-gambit-builtin-keywords 1)) . 1)))
+
+(geiser-syntax--scheme-indent
+ (receive 2)
+ (match 1)
+ (match-lambda 0)
+ (match-lambda* 0)
+ (match-let scheme-let-indent)
+ (match-let* 1)
+ (match-letrec 1)
+ (declare 0)
+ (cond-expand 0)
+ (let-values scheme-let-indent)
+ (let*-values scheme-let-indent)
+ (letrec-values 1)
+ (letrec* 1)
+ (parameterize scheme-let-indent)
+ (let-location 1)
+ (foreign-lambda 2)
+ (foreign-lambda* 2)
+ (foreign-primitive 2)
+ (foreign-safe-lambda 2)
+ (foreign-safe-lambda* 2)
+ (set! 1)
+ (let-optionals* 2)
+ (let-optionals 2)
+ (condition-case 1)
+ (fluid-let 1)
+ (and-let* 1)
+ (assume 1)
+ (cut 1)
+ (cute 1)
+ (when 1)
+ (unless 1)
+ (dotimes 1)
+ (compiler-typecase 1)
+ (ecase 1)
+ (use 0)
+ (require-extension 0)
+ (import 0)
+ (handle-exceptions 2)
+ (regex-case 1)
+ (define-inline 1)
+ (define-constant 1)
+ (define-syntax-rule 1)
+ (define-record-type 1)
+ (define-values 1)
+ (define-record 1)
+ (define-specialization 1)
+ (define-type 1)
+ (with-input-from-pipe 1)
+ (select 1)
+ (functor 3)
+ (define-interface 1)
+ (module 2))
+
+;;; REPL startup
+
+(defconst geiser-gambit-minimum-version "v4.7.3")
+
+(defun geiser-gambit--version (binary)
+  (shell-command-to-string (format "%s -e \"(display (##system-version-string))\""
+                                   binary)))
+
+(defun connect-to-gambit ()
+  "Start a Gambit REPL connected to a remote process."
+  (interactive)
+  (geiser-connect 'gambit))
+
+(defun geiser-gambit--startup (remote)
+  (compilation-setup t)
+  (let ((geiser-log-verbose-p t)
+        (geiser-gambit-load-file (expand-file-name "gambit/geiser/emacs.scm" geiser-scheme-dir)))
+    (if geiser-gambit-compile-geiser-p
+      (geiser-eval--send/wait (format "(use utils)(compile-file \"%s\")(import geiser)"
+                                      geiser-gambit-load-file))
+      (geiser-eval--send/wait (format "(load \"%s\")"
+                                      geiser-gambit-load-file)))))
+
+;;; Implementation definition:
+
+(define-geiser-implementation gambit
+  (unsupported-procedures '(callers callees generic-methods))
+  (binary geiser-gambit--binary)
+  (arglist geiser-gambit--parameters)
+  (version-command geiser-gambit--version)
+  (minimum-version geiser-gambit-minimum-version)
+  (repl-startup geiser-gambit--startup)
+  (prompt-regexp geiser-gambit--prompt-regexp)
+  (debugger-prompt-regexp nil)
+  (enter-debugger nil)
+  (marshall-procedure geiser-gambit--geiser-procedure)
+  (find-module geiser-gambit--get-module)
+  (enter-command geiser-gambit--enter-command)
+  (exit-command geiser-gambit--exit-command)
+  (import-command geiser-gambit--import-command)
+  (find-symbol-begin geiser-gambit--symbol-begin)
+  (display-error geiser-gambit--display-error)
+  (external-help geiser-gambit--external-help)
+  (check-buffer geiser-gambit--guess)
+  (keywords geiser-gambit--keywords)
+  (case-sensitive geiser-gambit-case-sensitive-p))
+
+(geiser-impl--add-to-alist 'regexp "\\.scm$" 'gambit t)
+(geiser-impl--add-to-alist 'regexp "\\.release-info$" 'gambit t)
+(geiser-impl--add-to-alist 'regexp "\\.meta$" 'gambit t)
+(geiser-impl--add-to-alist 'regexp "\\.setup$" 'gambit t)
+
+(provide 'geiser-gambit)
+
+
diff --git a/elisp/geiser-impl.el b/elisp/geiser-impl.el
index c14db42..0455772 100644
--- a/elisp/geiser-impl.el
+++ b/elisp/geiser-impl.el
@@ -29,7 +29,7 @@
   :group 'geiser-implementation)
 
 (geiser-custom--defcustom geiser-active-implementations
-    '(guile racket chicken chez mit chibi)
+    '(guile racket chicken chez mit chibi gambit)
   "List of active installed Scheme implementations."
   :type '(repeat symbol)
   :group 'geiser-implementation)
diff --git a/scheme/gambit/geiser/gambit.scm b/scheme/gambit/geiser/gambit.scm
new file mode 100644
index 0000000..805fe31
--- /dev/null
+++ b/scheme/gambit/geiser/gambit.scm
@@ -0,0 +1,4 @@
+;; TODO implement functions required by geiser
+
+(display "loaded gambit.scm\n")
+
-- 
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