Racket: geiser-add-to-load-path implemented

And we take the chance to lightly document the existence of this
new command in the user manual.

4 files changed, 20 insertions, 5 deletions

diff --git a/doc/cheat.texi b/doc/cheat.texi
index d222a13..bdcd2aa 100644
--- a/doc/cheat.texi
+++ b/doc/cheat.texi
@@ -36,6 +36,9 @@ third key not modified by @key{Control}; e.g.,
 @item C-c C-e C-m
 @tab @code{geiser-edit-module}
 @tab Ask for a module and open its file
+@item C-c C-e C-l
+@tab @code{geiser-add-to-load-path}
+@tab Ask for a directory and add to Scheme load path
 @item C-c C-e C-[
 @tab @code{geiser-squarify}
 @tab Toggle between () and [] for current form
@@ -133,6 +136,9 @@ third key not modified by @key{Control}; e.g.,
 @item M-`, C-.
 @tab @code{geiser-completion--complete-module}
 @tab Complete module name at point
+@item C-c C-r
+@tab @code{geiser-add-to-load-path}
+@tab Ask for a directory and add to Scheme load path
 @item M-p, M-n
 @tab (comint commands)
 @tab Prompt history, matching current prefix
diff --git a/scheme/racket/geiser/eval.rkt b/scheme/racket/geiser/eval.rkt
index f1f3f51..a59e275 100644
--- a/scheme/racket/geiser/eval.rkt
+++ b/scheme/racket/geiser/eval.rkt
@@ -1,6 +1,6 @@
 ;;; eval.rkt -- evaluation
 
-;; Copyright (C) 2009, 2010 Jose Antonio Ortega Ruiz
+;; Copyright (C) 2009, 2010, 2011 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
@@ -14,6 +14,7 @@
 (provide eval-in
          load-file
          macroexpand
+         add-to-load-path
          make-repl-reader)
 
 
@@ -65,6 +66,15 @@
       (lambda ()
         (pretty-print (syntax->datum ((if all expand expand-once) form)))))))
 
+(define (add-to-load-path p)
+  (when (string? p)
+    (let ([p (string->path p)]
+          [cps (current-library-collection-paths)])
+      (unless (member p cps)
+        (current-library-collection-paths
+         (cons p cps)))))
+  #t)
+
 (define (make-repl-reader reader)
   (lambda ()
     (last-namespace (current-namespace))
diff --git a/scheme/racket/geiser/main.rkt b/scheme/racket/geiser/main.rkt
index c759089..b1db6fb 100644
--- a/scheme/racket/geiser/main.rkt
+++ b/scheme/racket/geiser/main.rkt
@@ -1,6 +1,6 @@
 ;;; main.rkt -- exported interface for emacs
 
-;; Copyright (C) 2010 Jose Antonio Ortega Ruiz
+;; Copyright (C) 2010, 2011 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
@@ -44,7 +44,7 @@
   (load-file file))
 
 (define geiser:compile-file geiser:load-file)
-
+(define geiser:add-to-load-path add-to-load-path)
 (define geiser:autodoc autodoc)
 (define geiser:help get-help)
 (define geiser:completions symbol-completions)
@@ -55,5 +55,3 @@
 (define geiser:macroexpand macroexpand)
 (define geiser:symbol-documentation symbol-documentation)
 (define (geiser:no-values) (values))
-
-;;; main.rkt ends here
diff --git a/scheme/racket/geiser/user.rkt b/scheme/racket/geiser/user.rkt
index 69a5df7..3ef978b 100644
--- a/scheme/racket/geiser/user.rkt
+++ b/scheme/racket/geiser/user.rkt
@@ -73,6 +73,7 @@
          [(enter) (enter! (read) #'cmd)]
          [(geiser-eval) (geiser-eval)]
          [(geiser-no-values) (datum->syntax #f (void))]
+         [(add-to-load-path) (add-to-load-path (read))]
          [else form])]
       [_ form])))