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guile/meta/guile-tools.in
Andy Wingo 92a70bcf29 fix guile-tools getopt
* meta/guile-tools.in (getopt): Define a local version of getopt that
  stops parsing options when it sees a non-option.
2011-01-27 18:18:14 +01:00

198 lines
6.8 KiB
Scheme
Executable file

#!/bin/sh
# -*- scheme -*-
exec guile $GUILE_FLAGS -e '(@@ (guile-tools) main)' -s "$0" "$@"
!#
;;;; guile-tools --- running scripts bundled with Guile
;;;; Andy Wingo <wingo@pobox.com> --- April 2009
;;;;
;;;; Copyright (C) 2009, 2010, 2011 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
(define-module (guile-tools)
#:use-module ((srfi srfi-1) #:select (fold append-map))
#:autoload (ice-9 format) (format))
;; Hack to provide scripts with the bug-report address.
(module-define! the-scm-module
'%guile-bug-report-address
"@PACKAGE_BUGREPORT@")
(define *option-grammar*
'((help (single-char #\h))
(version (single-char #\v))))
(define (display-help)
(display "\
Usage: guile-tools --version
guile-tools --help
guile-tools PROGRAM [ARGS]
If PROGRAM is \"list\" or omitted, display available scripts, otherwise
PROGRAM is run with ARGS.
"))
(define (display-version)
(format #t "guile-tools (GNU Guile ~A) ~A
Copyright (C) 2010 Free Software Foundation, Inc.
License LGPLv3+: GNU LGPL version 3 or later <http://gnu.org/licenses/lgpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
" (version) (effective-version)))
(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)
(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)
(for-each (lambda (x)
;; would be nice to show a summary.
(format #t "~A\n" x))
(find-submodules '(scripts))))
(define (find-script s)
(resolve-module (list 'scripts (string->symbol s)) #:ensure #f))
(define (getopt args grammar)
(define (fail)
(format (current-error-port)
"Try `guile-tools --help' for more information.~%")
(exit 1))
(define (unrecognized-arg arg)
(format (current-error-port)
"guile-tools: unrecognized option: `~a'~%" arg)
(fail))
(define (unexpected-value sym val)
(format (current-error-port)
"guile-tools: option `--~a' does not take an argument (given ~s)~%"
sym val)
(fail))
(define (single-char-table grammar)
(cond
((null? grammar) '())
((assq 'single-char (cdar grammar))
=> (lambda (form)
(acons (cadr form) (car grammar)
(single-char-table (cdr grammar)))))
(else
(single-char-table (cdr grammar)))))
(let ((single (single-char-table grammar)))
(let lp ((args (cdr args)) (options '()))
(cond
((or (null? args) (equal? (car args) "-"))
(values (reverse options) args))
((equal? (car args) "--")
(values (reverse options) (cdr args)))
((string-prefix? "--" (car args))
(let* ((str (car args))
(eq (string-index str #\= 2))
(sym (string->symbol
(substring str 2 (or eq (string-length str)))))
(val (and eq (substring str (1+ eq))))
(spec (assq sym grammar)))
(cond
((not spec)
(unrecognized-arg (substring str 0 (or eq (string-length str)))))
(val
;; no values for now
(unexpected-value sym val))
((assq-ref (cdr spec) 'value)
(error "options with values not supported right now"))
(else
(lp (cdr args) (acons sym #f options))))))
((string-prefix? "-" (car args))
(let lp* ((chars (cdr (string->list (car args)))) (options options))
(if (null? chars)
(lp (cdr args) options)
(let ((spec (assv-ref single (car chars))))
(cond
((not spec)
(unrecognized-arg (string #\- (car chars))))
((assq-ref (cdr spec) 'value)
(error "options with values not supported right now"))
(else
(lp* (cdr chars) (acons (car spec) #f options))))))))
(else (values (reverse options) args))))))
(define (main args)
(setlocale LC_ALL "")
(call-with-values (lambda () (getopt args *option-grammar*))
(lambda (options args)
(cond
((assq 'help options)
(display-help)
(exit 0))
((assq 'version options)
(display-version)
(exit 0))
((or (equal? args '())
(equal? args '("list")))
(list-scripts))
((find-script (car args))
=> (lambda (mod)
(exit (apply (module-ref mod 'main) (cdr args)))))
(else
(format (current-error-port)
"guile-tools: unknown script ~s~%" (car args))
(format (current-error-port)
"Try `guile-tools --help' for more information.~%")
(exit 1))))))