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+;;; geiser-chez.el -- Chez Scheme's implementation of the geiser protocols
+
+;; 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>.
+
+
+;;; Code:
+
+(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-lib))
+
+
+;;; Customization:
+
+(defgroup geiser-chez nil
+ "Customization for Geiser's Chez Scheme flavour."
+ :group 'geiser)
+
+(geiser-custom--defcustom geiser-chez-binary
+ "scheme"
+ "Name to use to call the Chez Scheme executable when starting a REPL."
+ :type '(choice string (repeat string))
+ :group 'geiser-chez)
+
+(geiser-custom--defcustom geiser-chez-init-file "~/.chez-geiser"
+ "Initialization file with user code for the Chez REPL."
+ :type 'string
+ :group 'geiser-chez)
+
+(geiser-custom--defcustom geiser-chez-extra-command-line-parameters '()
+ "Additional parameters to supply to the Chez binary."
+ :type '(repeat string)
+ :group 'geiser-chez)
+
+
+;;; REPL support:
+
+(defun geiser-chez--binary ()
+ (if (listp geiser-chez-binary)
+ (car geiser-chez-binary)
+ geiser-chez-binary))
+
+(defun geiser-chez--parameters ()
+ "Return a list with all parameters needed to start Chez Scheme.
+This function uses `geiser-chez-init-file' if it exists."
+ (let ((init-file (and (stringp geiser-chez-init-file)
+ (expand-file-name geiser-chez-init-file))))
+ `(,@(and init-file (file-readable-p init-file) (list init-file))
+ ,(expand-file-name "chez/geiser/geiser.ss" geiser-scheme-dir)
+ ,@geiser-chez-extra-command-line-parameters)))
+
+(defconst geiser-chez--prompt-regexp "> ")
+
+
+;;; Evaluation support:
+
+(defun geiser-chez--geiser-procedure (proc &rest args)
+ (cl-case proc
+ ((eval compile)
+ (let ((form (mapconcat 'identity (cdr args) " "))
+ (module (cond ((string-equal "'()" (car args))
+ "'()")
+ ((and (car args))
+ (concat "'" (car args)))
+ (t
+ "#f"))))
+ (format "(geiser:eval %s '%s)" module 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)))))
+
+(defun geiser-chez--get-module (&optional module)
+ (cond ((null module)
+ :f)
+ ((listp module) module)
+ ((stringp module)
+ (condition-case nil
+ (car (geiser-syntax--read-from-string module))
+ (error :f)))
+ (t :f)))
+
+(defun geiser-chez--symbol-begin (module)
+ (if module
+ (max (save-excursion (beginning-of-line) (point))
+ (save-excursion (skip-syntax-backward "^(>") (1- (point))))
+ (save-excursion (skip-syntax-backward "^'-()>") (point))))
+
+(defun geiser-chez--import-command (module)
+ (format "(import %s)" module))
+
+(defun geiser-chez--exit-command () "(exit 0)")
+;;
+;; ;;; REPL startup
+
+(defconst geiser-chez-minimum-version "9.4")
+
+(defun geiser-chez--version (binary)
+ (car (process-lines binary "--version")))
+
+(defun geiser-chez--startup (remote)
+ (let ((geiser-log-verbose-p t))
+ (compilation-setup t)
+ (geiser-eval--send/wait "(begin (import (geiser)) (write `((result ) (output . \"\"))) (newline))")))
+
+(defun geiser-chez--display-error (module key msg)
+ (when (stringp msg)
+ (save-excursion (insert msg))
+ (geiser-edit--buttonize-files))
+ (and (or (eq key 'chez-error-message)
+ (not key))
+ (not (zerop (length msg)))
+ msg))
+
+;;; Implementation definition:
+
+(define-geiser-implementation chez
+ (binary geiser-chez--binary)
+ (arglist geiser-chez--parameters)
+ (version-command geiser-chez--version)
+ (minimum-version geiser-chez-minimum-version)
+ (repl-startup geiser-chez--startup)
+ (prompt-regexp geiser-chez--prompt-regexp)
+ (debugger-prompt-regexp nil) ;; geiser-chez--debugger-prompt-regexp
+ ;; (enter-debugger geiser-chez--enter-debugger)
+ (marshall-procedure geiser-chez--geiser-procedure)
+ (find-module geiser-chez--get-module)
+ ;; (enter-command geiser-chez--enter-command)
+ (exit-command geiser-chez--exit-command)
+ (import-command geiser-chez--import-command)
+ (find-symbol-begin geiser-chez--symbol-begin)
+ (display-error geiser-chez--display-error)
+ ;; (external-help geiser-chez--manual-look-up)
+ ;; (check-buffer geiser-chez--guess)
+ ;; (keywords geiser-chez--keywords)
+ ;; (case-sensitive geiser-chez-case-sensitive-p)
+ )
+
+(geiser-impl--add-to-alist 'regexp "\\.ss$" 'chez t)
+(geiser-impl--add-to-alist 'regexp "\\.def$" 'chez t)
+
+(provide 'geiser-chez)