From 708205e21031dd016172523ef15e9aeda4417412 Mon Sep 17 00:00:00 2001
From: Jose Antonio Ortega Ruiz <jao@gnu.org>
Date: Wed, 4 Mar 2009 02:07:41 +0100
Subject: New geiser-reload command. New geiser command.

---
 README                |  2 ++
 elisp/geiser-debug.el |  1 -
 elisp/geiser-mode.el  | 11 +++++++++
 elisp/geiser-repl.el  | 18 +++++++++++++--
 elisp/geiser.el       | 64 +++++++++++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 93 insertions(+), 3 deletions(-)

diff --git a/README b/README
index 0300dfa..98ddf77 100644
--- a/README
+++ b/README
@@ -13,6 +13,8 @@
     In particular, customize `geiser-repl-guile-binary' (in
     geiser-repl), which should point to a guile-vm executable.
 
+  - To start a REPL, M-x geiser.
+
 * Quick key reference
 
 *** In Scheme buffers:
diff --git a/elisp/geiser-debug.el b/elisp/geiser-debug.el
index 0bc3f85..35b81ca 100644
--- a/elisp/geiser-debug.el
+++ b/elisp/geiser-debug.el
@@ -25,7 +25,6 @@
 
 ;;; Code:
 
-(require 'geiser-repl)
 (require 'geiser-eval)
 (require 'geiser-popup)
 (require 'geiser-base)
diff --git a/elisp/geiser-mode.el b/elisp/geiser-mode.el
index 6a3df40..855f071 100644
--- a/elisp/geiser-mode.el
+++ b/elisp/geiser-mode.el
@@ -192,6 +192,17 @@ interacting with the Geiser REPL is at your disposal.
 (geiser-mode--triple-chord ?x ?r 'geiser-expand-region)
 (geiser-mode--triple-chord ?x ?x 'geiser-expand-definition)
 
+
+;;; Reload support:
+
+(defun geiser-mode--buffers ()
+  (let ((buffers))
+    (dolist (buffer (buffer-list))
+      (when (buffer-live-p buffer)
+        (set-buffer buffer)
+        (when geiser-mode (push buffer buffers))))
+    buffers))
+
 
 (provide 'geiser-mode)
 ;;; geiser-mode.el ends here
diff --git a/elisp/geiser-repl.el b/elisp/geiser-repl.el
index c542a66..304b0d4 100644
--- a/elisp/geiser-repl.el
+++ b/elisp/geiser-repl.el
@@ -158,9 +158,13 @@ REPL buffer."
 ;;; Interface: starting and interacting with geiser REPL:
 
 (defalias 'switch-to-guile 'run-guile)
-(defalias 'switch-to-geiser-repl 'run-guile)
 
-(defun run-guile (&optional arg)
+(defun run-guile ()
+  "Run Geiser using Guile."
+  (interactive)
+  (geiser 'guile))
+
+(defun geiser (&optional implementation)
   "Show the geiser-repl buffer, starting the process if needed."
   (interactive)
   (let ((buf (process-buffer (geiser-repl--process t)))
@@ -223,6 +227,16 @@ REPL buffer."
 (define-key geiser-repl-mode-map "\M-." 'geiser-edit-symbol-at-point)
 (define-key geiser-repl-mode-map "\M-," 'geiser-edit-pop-edit-symbol-stack)
 
+
+;;; Unload:
+
+(defun geiser-repl--live-p ()
+  (buffer-live-p geiser-repl--buffer))
+
+(defun geiser-repl-unload-function ()
+  (when (geiser-repl--live-p)
+    (kill-buffer geiser-repl--buffer))
+  t)
 
 
 (provide 'geiser-repl)
diff --git a/elisp/geiser.el b/elisp/geiser.el
index 3bdc218..ea41779 100644
--- a/elisp/geiser.el
+++ b/elisp/geiser.el
@@ -45,6 +45,9 @@
 
 ;;; Autoloads:
 
+(autoload 'geiser "geiser-repl.el"
+  "Start a Geiser REPL, or switch to a running one." t)
+
 (autoload 'run-guile "geiser-repl.el"
   "Start a Geiser Guile REPL, or switch to a running one." t)
 
@@ -69,6 +72,67 @@
 (defun geiser-setup ()
   (geiser-setup-scheme-mode))
 
+
+;;; Reload:
+
+(defmacro geiser--features-list ()
+  (quote '(
+           geiser-mode
+           geiser-repl
+           geiser-doc
+           geiser-edit
+           geiser-completion
+           geiser-autodoc
+           geiser-compile
+           geiser-debug
+           geiser-eval
+           geiser-connection
+           geiser-syntax
+           geiser-log
+           geiser-custom
+           geiser-base
+           geiser-popup
+           )))
+
+(defun geiser-unload-function ()
+  (dolist (feature (geiser--features-list))
+    (when (featurep feature) (unload-feature feature t)))
+  t)
+
+(defun geiser-unload ()
+  (interactive)
+  (when (featurep 'geiser) (unload-feature 'geiser)))
+
+(defun geiser-reload (&optional arg)
+  "Reload Geiser.
+With prefix arg, prompts for the DIRECTORY in which Geiser should be
+loaded."
+  (interactive "P")
+  (let* ((dir (or (and arg (read-directory-name "New Geiser root dir: "
+                                                geiser-root-dir
+                                                geiser-root-dir
+                                                t
+                                                geiser-root-dir))
+                  geiser-root-dir))
+         (geiser-main-file (expand-file-name "elisp/geiser.el" dir))
+         (repl (and (featurep 'geiser-repl) (geiser-repl--live-p)))
+         (buffers (and (featurep 'geiser-mode) (geiser-mode--buffers))))
+    (unless (file-exists-p geiser-main-file)
+      (error "%s does not contain Geiser!" dir))
+    (remove geiser-elisp-dir load-path)
+    (geiser-unload)
+    (load-file geiser-main-file)
+    (geiser-setup)
+    (when repl
+      (load-library "geiser-repl")
+      (geiser 'repl))
+    (when buffers
+      (load-library "geiser-mode")
+      (dolist (b buffers)
+        (set-buffer b)
+        (geiser-mode 1)))
+    (message "Geiser reloaded!")))
+
 
 (provide 'geiser)
 ;;; geiser.el ends here
-- 
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