From 8cb76f1c5887d51fb96750f6dd97b8381f783fe6 Mon Sep 17 00:00:00 2001
From: Jose Antonio Ortega Ruiz <jao@gnu.org>
Date: Mon, 2 Mar 2009 03:13:59 +0100
Subject: Breakdown of schemeland into neat submodules.

---
 geiser/modules.scm | 102 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 102 insertions(+)
 create mode 100644 geiser/modules.scm

(limited to 'geiser/modules.scm')

diff --git a/geiser/modules.scm b/geiser/modules.scm
new file mode 100644
index 0000000..13a1cdd
--- /dev/null
+++ b/geiser/modules.scm
@@ -0,0 +1,102 @@
+;; modules.scm -- module metadata
+
+;; Copyright (C) 2009 Jose Antonio Ortega Ruiz
+
+;; Author: Jose Antonio Ortega Ruiz <jao@gnu.org>
+;; Start date: Mon Mar 02, 2009 02:00
+
+;; This file 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 file 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 <http://www.gnu.org/licenses/>.
+
+;;; Comentary:
+
+;; Utilities for accessing metadata about modules.
+
+;;; Code:
+
+(define-module (geiser modules)
+  #:export (symbol-module
+            module-filename
+            all-modules
+            module-children
+            module-location)
+  #:use-module (geiser utils)
+  #:use-module (ice-9 regex)
+  #:use-module (ice-9 session)
+  #:use-module (srfi srfi-1))
+
+(define (symbol-module sym)
+  (and sym
+       (call/cc
+        (lambda (k)
+          (apropos-fold (lambda (module name var init)
+                          (if (eq? name sym) (k (module-name module)) init))
+                        #f
+                        (regexp-quote (symbol->string sym))
+                        (apropos-fold-accessible (current-module)))))))
+
+(define (module-location name)
+  (make-location (module-filename name) #f))
+
+(define module-filename (@@ (ice-9 session) module-filename))
+
+(define (all-modules)
+  (let ((roots ((@@ (ice-9 session) root-modules))))
+    (sort! (map (lambda (m)
+                  (format "~A" (module-name m)))
+                (fold (lambda (m all)
+                        (append (all-child-modules m) all))
+                      roots
+                      roots))
+           string<?)))
+
+(define (module-children mod-name)
+  (let* ((elts (hash-fold classify-module-object
+                          (list '() '() '())
+                          (module-obarray (maybe-module-interface mod-name))))
+         (elts (map sort-symbols! elts)))
+    (list (cons 'modules (map (lambda (m) `(,@mod-name ,m)) (car elts)))
+          (cons 'procs (cadr elts))
+          (cons 'vars (caddr elts)))))
+
+(define (maybe-module-interface mod-name)
+  (catch #t
+    (lambda () (resolve-interface mod-name))
+    (lambda args (resolve-module mod-name))))
+
+(define (child-modules mod)
+  (delq mod ((@@ (ice-9 session) submodules) mod)))
+
+(define (all-child-modules mod)
+  (let ((children (child-modules mod)))
+    (fold (lambda (m all)
+            (append (all-child-modules m) all))
+          children children)))
+
+(define (classify-module-object name var elts)
+  (let ((obj (and (variable-bound? var)
+                  (variable-ref var))))
+    (cond ((not obj) elts)
+          ((and (module? obj) (eq? (module-kind obj) 'directory))
+           (list (cons name (car elts))
+                 (cadr elts)
+                 (caddr elts)))
+          ((or (procedure? obj) (program? obj) (macro? obj))
+           (list (car elts)
+                 (cons name (cadr elts))
+                 (caddr elts)))
+          (else (list (car elts)
+                      (cadr elts)
+                      (cons name (caddr elts)))))))
+
+;;; modules.scm ends here
-- 
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