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;;; List --- List scripts that can be invoked by guild -*- coding: iso-8859-1 -*-
;;;; Copyright (C) 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
;;;;
;;;; This library is free software; you can redistribute it and/or
;;;; modify it under the terms of the GNU Lesser General Public
;;;; License as published by the Free Software Foundation; either
;;;; version 3 of the License, or (at your option) any later version.
;;;;
;;;; This library 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
;;;; Lesser General Public License for more details.
;;;;
;;;; You should have received a copy of the GNU Lesser General Public
;;;; License along with this library; if not, write to the Free
;;;; Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;;;; Boston, MA 02110-1301 USA
;;; Commentary:
;; Usage: list
;;
;; List scripts that can be invoked by guild.
;;; Code:
(define-module (scripts list)
#:use-module (srfi srfi-1)
#:export (list-scripts))
(define %include-in-guild-list #f)
(define %summary "An alias for \"help\".")
(define (directory-files dir)
(if (and (file-exists? dir) (file-is-directory? dir))
(let ((dir-stream (opendir dir)))
(let loop ((new (readdir dir-stream))
(acc '()))
(if (eof-object? new)
(begin
(closedir dir-stream)
acc)
(loop (readdir dir-stream)
(if (or (string=? "." new) ; ignore
(string=? ".." new)) ; ignore
acc
(cons new acc))))))
'()))
(define (strip-extensions path)
(or-map (lambda (ext)
(and
(string-suffix? ext path)
;; We really can't be adding e.g. ChangeLog-2008 to the set
;; of runnable scripts, just because "" is a valid
;; extension, by default. So hack around that here.
(not (string-null? ext))
(substring path 0
(- (string-length path) (string-length ext)))))
(append %load-compiled-extensions %load-extensions)))
(define (unique l)
(cond ((null? l) l)
((null? (cdr l)) l)
((equal? (car l) (cadr l)) (unique (cdr l)))
(else (cons (car l) (unique (cdr l))))))
(define (find-submodules head)
(let ((shead (map symbol->string head)))
(unique
(sort
(append-map (lambda (path)
(fold (lambda (x rest)
(let ((stripped (strip-extensions x)))
(if stripped (cons stripped rest) rest)))
'()
(directory-files
(fold (lambda (x y) (in-vicinity y x)) path shead))))
%load-path)
string<?))))
(define (list-scripts . args)
(for-each (lambda (x)
;; would be nice to show a summary.
(format #t "~A\n" x))
(find-submodules '(scripts))))
(define (main . args)
(apply (@@ (scripts help) main) args))
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