From f531c3e0f5afda77ada497d3932ea10502e22bdb Mon Sep 17 00:00:00 2001
From: Jose Antonio Ortega Ruiz <jao@gnu.org>
Date: Sun, 21 Nov 2010 16:12:41 +0100
Subject: Racket: showing submodules in module help

---
 scheme/racket/geiser/autodoc.rkt     |  5 ++-
 scheme/racket/geiser/completions.rkt |  2 -
 scheme/racket/geiser/modules.rkt     | 71 ++++++++++++++++++++++++++++--------
 scheme/racket/geiser/startup.rkt     | 23 ++++++++++++
 scheme/racket/geiser/user.rkt        |  4 +-
 5 files changed, 83 insertions(+), 22 deletions(-)
 create mode 100644 scheme/racket/geiser/startup.rkt

(limited to 'scheme/racket/geiser')

diff --git a/scheme/racket/geiser/autodoc.rkt b/scheme/racket/geiser/autodoc.rkt
index e9c6a07..54cac24 100644
--- a/scheme/racket/geiser/autodoc.rkt
+++ b/scheme/racket/geiser/autodoc.rkt
@@ -229,5 +229,6 @@
                 (module-compiled-exports
                  (get-module-code (resolve-module-path mod #f)))])
     (let ([syn (map contracted (extract-ids syn))]
-          [reg (extract-ids reg)])
-      `((syntax ,@syn) ,@(classify-ids reg)))))
+          [reg (extract-ids reg)]
+          [subm (map list (or (submodules mod) '()))])
+      `((syntax ,@syn) ,@(classify-ids reg) (modules ,@subm)))))
diff --git a/scheme/racket/geiser/completions.rkt b/scheme/racket/geiser/completions.rkt
index 4cbc09f..0ed18d1 100644
--- a/scheme/racket/geiser/completions.rkt
+++ b/scheme/racket/geiser/completions.rkt
@@ -27,5 +27,3 @@
 
 (define (module-completions prefix)
   (filter-prefix prefix (module-list) #f))
-
-;;; completions.rkt ends here
diff --git a/scheme/racket/geiser/modules.rkt b/scheme/racket/geiser/modules.rkt
index 8e85570..02fd460 100644
--- a/scheme/racket/geiser/modules.rkt
+++ b/scheme/racket/geiser/modules.rkt
@@ -18,7 +18,8 @@
          namespace->module-path-name
          module-path-name->name
          module-spec->path-name
-         module-list)
+         module-list
+         submodules)
 
 (require srfi/13 geiser/enter)
 
@@ -71,8 +72,8 @@
                 [lens (map prefix-len cpaths)]
                 [real-path (substring path (apply max lens))])
            (if (absolute-path? real-path)
-               (call-with-values (lambda () (split-path path))
-                 (lambda (_ basename __) (path->string basename)))
+               (let-values ([(_ base __) (split-path path)])
+                 (path->string base))
                (regexp-replace "\\.[^./]*$" real-path "")))]
         ;; [(eq? path '#%kernel) "(kernel)"]
         [(string? path) path]
@@ -98,37 +99,75 @@
                 [len (- (string-length path) (bytes-length ext) 1)])
            (substring path 0 len)))))
 
-(define (visit-module-path path kind acc)
+(define main-rkt (build-path "main.rkt"))
+(define main-ss (build-path "main.ss"))
+
+(define ((visit-module-path reg?) path kind acc)
   (define (register e p)
-    (register-path (string->symbol e) (build-path (current-directory) p))
-    (cons e acc))
-  (define (find-main ext)
-    (let ([m (build-path path (string-append "main." ext))])
-      (and (file-exists? m) m)))
+    (when reg?
+      (register-path (string->symbol e) (build-path (current-directory) p)))
+    (values (cons e acc) reg?))
+  (define (get-main path main)
+    (and (file-exists? main) (build-path path main)))
+  (define (find-main path)
+    (parameterize ([current-directory path])
+      (or (get-main path main-rkt) (get-main path main-ss))))
   (case kind
     [(file) (let ([entry (path->entry path)])
               (if (not entry) acc (register entry path)))]
     [(dir) (cond [(skippable-dir? path) (values acc #f)]
-                 [(or (find-main "rkt") (find-main "ss")) =>
-                  (curry register (path->string path))]
-                 [else acc])]
+                 [(find-main path) => (curry register (path->string path))]
+                 [else (values acc reg?)])]
     [else acc]))
 
-(define (find-modules path acc)
+(define ((find-modules reg?) path acc)
   (if (directory-exists? path)
       (parameterize ([current-directory path])
-        (fold-files visit-module-path acc))
+        (fold-files (visit-module-path reg?) acc))
       acc))
 
+(define (take-while pred lst)
+  (let loop ([lst lst] [acc '()])
+    (cond [(null? lst) (reverse acc)]
+          [(pred (car lst)) (loop (cdr lst) (cons (car lst) acc))]
+          [else (reverse acc)])))
+
+(define (submodules mod)
+  (let* ([mod-name (if (symbol? mod) mod (get-mod mod))]
+         [mod-str (and (symbol? mod-name) (symbol->string mod-name))])
+    (if mod-str
+        (let ([ms (member mod-str (module-list))])
+          (and ms
+               (take-while (lambda (m) (string-prefix? mod-str m))
+                           (cdr ms))))
+        (find-submodules mod))))
+
+(define (find-submodules path)
+  (and (path-string? path)
+       (let-values ([(dir base ign) (split-path path)])
+         (and (or (equal? base main-rkt)
+                  (equal? base main-ss))
+              (map (lambda (m) (path->string (build-path dir m)))
+                   (remove "main" ((find-modules #f) dir '())))))))
+
 (define (known-modules)
-  (sort (foldl find-modules '() (current-library-collection-paths)) string<?))
+  (sort (foldl (find-modules #t)
+               '()
+               (current-library-collection-paths))
+        string<?))
 
 (define registered (make-hash))
+(define registered-paths (make-hash))
+
+(define (get-path mod)
+  (hash-ref registered mod #f))
 
-(define (get-path mod) (hash-ref registered mod #f))
+(define (get-mod path)
+  (hash-ref registered-paths path #f))
 
 (define (register-path mod path)
   (hash-set! registered mod path)
+  (hash-set! registered-paths path mod)
   path)
 
 (define module-cache #f)
diff --git a/scheme/racket/geiser/startup.rkt b/scheme/racket/geiser/startup.rkt
new file mode 100644
index 0000000..6af06da
--- /dev/null
+++ b/scheme/racket/geiser/startup.rkt
@@ -0,0 +1,23 @@
+;;; startup.rkt -- entry point
+
+;; Copyright (C) 2009, 2010 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: Sat Apr 25, 2009 22:36
+
+;;; Code:
+
+(require version/utils)
+(unless (version<=? "5.0" (version))
+  (error 'geiser
+         "Racket version 5.0 or better required (found ~a)"
+         (version)))
+
+(require errortrace)
+(require geiser/user)
+
+(init-geiser-repl)
diff --git a/scheme/racket/geiser/user.rkt b/scheme/racket/geiser/user.rkt
index 4dc13e4..70defd4 100644
--- a/scheme/racket/geiser/user.rkt
+++ b/scheme/racket/geiser/user.rkt
@@ -16,7 +16,7 @@
 (require (for-syntax racket/base)
          mzlib/thread
          racket/tcp
-         geiser/main
+         geiser
          geiser/enter
          geiser/eval
          geiser/modules)
@@ -38,7 +38,7 @@
 (define geiser-loader (module-loader orig-loader))
 
 (define (geiser-eval)
-  (define geiser-main (module->namespace 'geiser/main))
+  (define geiser-main (module->namespace 'geiser))
   (let* ([mod (read)]
          [lang (read)]
          [form (read)])
-- 
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