3 ;;; Option parser, standard issue
5 ;;; (c) 2005 Straylight/Edgeware
8 ;;;----- Licensing notice ---------------------------------------------------
10 ;;; This file is part of the Sensible Object Design, an object system for C.
12 ;;; SOD is free software; you can redistribute it and/or modify
13 ;;; it under the terms of the GNU General Public License as published by
14 ;;; the Free Software Foundation; either version 2 of the License, or
15 ;;; (at your option) any later version.
17 ;;; SOD is distributed in the hope that it will be useful,
18 ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
19 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 ;;; GNU General Public License for more details.
22 ;;; You should have received a copy of the GNU General Public License
23 ;;; along with SOD; if not, write to the Free Software Foundation,
24 ;;; Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
26 (cl:defpackage #:optparse
27 (:use #:common-lisp #:sod-utilities))
29 (cl:in-package #:optparse)
31 ;;;--------------------------------------------------------------------------
32 ;;; Program environment things.
35 (defun exit (&optional (code 0) &key abrupt)
36 "End program, returning CODE to the caller."
37 (declare (type (unsigned-byte 32) code))
38 #.(car '(#+sbcl (sb-ext:exit :code code :abort abrupt)
40 (unix::void-syscall ("_exit" c-call:int) code)
42 #+clisp (funcall (if abrupt #'ext:quit #'ext:exit) code)
45 (format *error-output*
46 "~&Exiting unsuccessfully with code ~D.~%" code))))
49 (export '(*program-name* *command-line*))
50 (defvar *program-name* "<unknown>"
51 "Program name, as retrieved from the command line.")
52 (defvar *command-line* nil
53 "A list of command-line arguments, including the program name.")
55 (export 'set-command-line-arguments)
56 (defun set-command-line-arguments ()
57 "Retrieve command-line arguments.
59 Set `*command-line*' and `*program-name*'."
62 (let ((uiop-package (find-package :uiop))
63 (cll-package (find-package :cl-launch)))
64 (cons (or (and uiop-package
65 (funcall (intern "ARGV0" uiop-package)))
67 (some (intern "GETENV" cll-package)
68 (list "__CL_ARGV0" "CL_LAUNCH_FILE")))
69 #+sbcl (car sb-ext:*posix-argv*)
70 #+cmu (car ext:*command-line-strings*)
71 #+clisp (aref (ext:argv) 0)
75 (funcall (intern "COMMAND-LINE-ARGUMENTS"
78 (symbol-value (intern "*ARGUMENTS*" cll-package)))
79 (t #.(or (car '(#+sbcl (cdr sb-ext:*posix-argv*)
80 #+cmu (cdr ext:*command-line-strings*)
81 #+clisp (coerce (subseq (ext:argv) 8)
83 #+ecl (loop for i from 1
85 collect (ext:argv i))))
86 (error "Unsupported Lisp."))))))
88 *program-name* (pathname-name (car *command-line*))))
90 ;;;--------------------------------------------------------------------------
91 ;;; Fancy conditionals.
93 (eval-when (:compile-toplevel :load-toplevel :execute)
94 (defun do-case2-like (kind vform clauses)
95 "Helper function for `case2' and `ecase2'."
96 (with-gensyms (scrutinee argument)
97 `(multiple-value-bind (,scrutinee ,argument) ,vform
98 (declare (ignorable ,argument))
100 ,@(mapcar (lambda (clause)
102 (cases (&optional varx vary) &rest forms)
106 (list `(let ((,(or vary varx) ,argument)
108 `((,varx ,scrutinee))))
113 (defmacro case2 (vform &body clauses)
114 "Switch based on the first value of a form, capturing the second value.
116 VFORM is a form which evaluates to two values, SCRUTINEE and ARGUMENT.
117 The CLAUSES have the form (CASES ([[SCRUVAR] ARGVAR]) FORMS...), where a
118 standard `case' clause has the form (CASES FORMS...). The `case2' form
119 evaluates the VFORM, and compares the SCRUTINEE to the various CASES, in
120 order, just like `case'. If there is a match, then the corresponding
121 FORMs are evaluated with ARGVAR bound to the ARGUMENT and SCRUVAR bound to
122 the SCRUTINEE (where specified). Note the bizarre defaulting behaviour:
123 ARGVAR is less optional than SCRUVAR."
124 (do-case2-like 'case vform clauses))
126 (defmacro ecase2 (vform &body clauses)
127 "Like `case2', but signals an error if no clause matches the SCRUTINEE."
128 (do-case2-like 'ecase vform clauses))
130 ;;;--------------------------------------------------------------------------
131 ;;; Standard error-reporting functions.
134 (defun moan (msg &rest args)
135 "Report an error message in the usual way."
136 (format *error-output* "~&~A: ~?~%" *program-name* msg args))
139 (defun die (&rest args)
140 "Report an error message and exit."
144 ;;;--------------------------------------------------------------------------
145 ;;; The main option parser.
148 (defvar *options* nil
149 "The default list of command-line options.")
151 (export '(option optionp make-option
152 opt-short-name opt-long-name opt-tag opt-negated-tag
153 opt-arg-name opt-arg-optional-p opt-documentation))
160 (print-unreadable-object (o s :type t)
161 (format s "~@[-~C, ~]~@[--~A~]~
162 ~*~@[~2:*~:[=~A~;[=~A]~]~]~
166 (opt-arg-optional-p o)
168 (opt-documentation o)))))
169 (:constructor %make-option)
170 (:constructor make-option
171 (long-name short-name
173 &key (tag (intern (string-upcase long-name) :keyword))
176 doc (documentation doc))))
177 "Describes a command-line option. Slots:
179 LONG-NAME The option's long name. If this is null, the `option' is
180 just a banner to be printed in the program's help text.
182 TAG The value to be returned if this option is encountered. If
183 this is a function, instead, the function is called with the
184 option's argument or nil.
186 NEGATED-TAG As for TAG, but used if the negated form of the option is
187 found. If this is nil (the default), the option cannot be
190 SHORT-NAME The option's short name. This must be a single character, or
191 nil if the option has no short name.
193 ARG-NAME The name of the option's argument, a string. If this is nil,
194 the option doesn't accept an argument. The name is shown in
198 If non-nil, the option's argument is optional. This is
199 ignored unless ARG-NAME is non-null.
202 The help text for this option. It is automatically line-
203 wrapped. If nil, the option is omitted from the help
206 Usually, one won't use make-option, but use the option macro instead."
207 (long-name nil :type (or null string))
209 (negated-tag nil :type t)
210 (short-name nil :type (or null character))
211 (arg-name nil :type (or null string))
212 (arg-optional-p nil :type t)
213 (documentation nil :type (or null string)))
215 (export '(option-parser option-parser-p make-option-parser
216 op-options op-non-option op-long-only-p op-numeric-p
217 op-negated-numeric-p op-negated-p))
218 (defstruct (option-parser
220 (:constructor make-option-parser
221 (&key ((:args argstmp) (cdr *command-line*))
224 ((:numericp numeric-p))
227 &aux (args (cons nil argstmp))
229 (negated-p (or negated-numeric-p
230 (some #'opt-negated-tag
232 "An option parser object. Slots:
234 ARGS The arguments to be parsed. Usually this will be
237 OPTIONS List of option structures describing the acceptable options.
239 NON-OPTION Behaviour when encountering a non-option argument. The
240 default is :skip. Allowable values are:
241 :skip -- pretend that it appeared after the option
242 arguments; this is the default behaviour of GNU getopt
243 :stop -- stop parsing options, leaving the remaining
244 command line unparsed
245 :return -- return :non-option and the argument word
247 NUMERIC-P Non-nil tag (as for options) if numeric options (e.g., -43)
248 are to be allowed. The default is nil. (Anomaly: the
249 keyword for this argument is :numericp.)
252 Non-nil tag (as for options) if numeric options (e.g., -43)
253 can be negated. This is not the same thing as a negative
256 LONG-ONLY-P A misnomer inherited from GNU getopt. Whether to allow
257 long options to begin with a single dash. Short options are
258 still allowed, and may be cuddled as usual. The default is
260 (args nil :type list)
261 (options nil :type list)
262 (non-option :skip :type (or function (member :skip :stop :return)))
263 (next nil :type list)
264 (short-opt nil :type (or null string))
265 (short-opt-index 0 :type fixnum)
266 (short-opt-neg-p nil :type t)
267 (long-only-p nil :type t)
268 (numeric-p nil :type t)
269 (negated-numeric-p nil :type t)
270 (negated-p nil :type t))
272 (export 'option-parse-error)
273 (define-condition option-parse-error (error simple-condition)
276 "Indicates an error found while parsing options.
278 Probably not that useful."))
280 (defun option-parse-error (msg &rest args)
281 "Signal an option-parse-error with the given message and arguments."
282 (error (make-condition 'option-parse-error
284 :format-arguments args)))
286 (export 'option-parse-remainder)
287 (defun option-parse-remainder (op)
288 "Returns the unparsed remainder of the command line."
291 (export 'option-parse-return)
292 (defun option-parse-return (tag &optional argument)
293 "Force a return from `option-parse-next' with TAG and ARGUMENT.
295 This should only be called from an option handler."
296 (throw 'option-parse-return (values tag argument)))
298 (export 'option-parse-next)
299 (defun option-parse-next (op)
300 "Parse and handle the next option from the command-line.
302 This is the main option-parsing function. OP is an option-parser object,
303 initialized appropriately. Returns two values, OPT and ARG: OPT is the
304 tag of the next option read, and ARG is the argument attached to it, or
305 nil if there was no argument. If there are no more options, returns nil
306 twice. Options whose TAG is a function aren't returned; instead, the tag
307 function is called, with the option argument (or nil) as the only
308 argument. It is safe for tag functions to throw out of
309 `option-parse-next', if they desparately need to. (This is the only way
310 to actually get `option-parse-next' to return a function value, should
311 that be what you want. See `option-parse-return' for a way of doing
314 While `option-parse-next' is running, there is a restart `skip-option'
315 which moves on to the next option. Error handlers should use this to
316 resume after parsing errors."
317 (labels ((ret (opt &optional arg)
318 (return-from option-parse-next (values opt arg)))
320 (setf (op-next op) nil)
328 (setf (op-next op) (cdr (op-next op))))
330 (setf (cdr (op-next op)) (cddr (op-next op))))
332 (prog1 (peek-arg) (eat-arg)))
334 (process-option (o name negp &key arg argfunc)
335 (cond ((not (opt-arg-name o))
338 "Option `~A' does not accept arguments"
342 (setf arg (funcall argfunc)))
343 ((opt-arg-optional-p o))
345 (setf arg (get-arg)))
347 (option-parse-error "Option `~A' requires an argument"
349 (let ((how (if negp (opt-negated-tag o) (opt-tag o))))
354 (process-long-option (arg start negp)
355 (when (and (not negp)
357 (> (length arg) (+ start 3))
359 :start1 start :end1 (+ start 3)))
363 (eqpos (position #\= arg :start start))
364 (len (or eqpos (length arg)))
365 (optname (subseq arg 0 len))
366 (len-2 (- len start)))
367 (dolist (o (op-options op))
368 (cond ((or (not (stringp (opt-long-name o)))
369 (and negp (not (opt-negated-tag o)))
370 (< (length (opt-long-name o)) len-2)
371 (string/= optname (opt-long-name o)
372 :start1 start :end2 len-2)))
373 ((= (length (opt-long-name o)) len-2)
374 (setf matches (list o))
378 (cond ((null matches)
379 (option-parse-error "Unknown option `~A'" optname))
382 #.(concatenate 'string
383 "Ambiguous long option `~A' -- "
387 (mapcar #'opt-long-name matches))))
388 (process-option (car matches)
392 (subseq arg (1+ eqpos)))))))
394 (catch 'option-parse-return
396 (with-simple-restart (skip-option "Skip this bogus option.")
399 ;; We're embroiled in short options: handle them.
401 (if (>= (op-short-opt-index op) (length (op-short-opt op)))
402 (setf (op-short-opt op) nil)
403 (let* ((str (op-short-opt op))
404 (i (op-short-opt-index op))
406 (negp (op-short-opt-neg-p op))
407 (name (format nil "~C~A" (if negp #\+ #\-) ch))
408 (o (find ch (op-options op) :key #'opt-short-name)))
410 (setf (op-short-opt-index op) i)
412 (and negp (not (opt-negated-tag o))))
413 (option-parse-error "Unknown option `~A'" name))
418 (and (< i (length str))
422 (setf (op-short-opt op)
425 ;; End of the list. Say we've finished.
429 ;; Process the next option.
431 (let ((arg (peek-arg)))
434 ;; Non-option. Decide what to do.
435 ((or (<= (length arg) 1)
436 (and (char/= (char arg 0) #\-)
437 (or (char/= (char arg 0) #\+)
438 (not (op-negated-p op)))))
439 (case (op-non-option op)
443 (ret :non-option arg))
445 (funcall (op-non-option op) arg))))
447 ;; Double-hyphen. Stop right now.
452 ;; Numbers. Check these before long options, since `--43'
453 ;; is not a long option.
454 ((and (op-numeric-p op)
455 (or (char= (char arg 0) #\-)
456 (op-negated-numeric-p op))
457 (or (and (digit-char-p (char arg 1))
458 (every #'digit-char-p (subseq arg 2)))
459 (and (or (char= (char arg 1) #\-)
460 (char= (char arg 1) #\+))
462 (digit-char-p (char arg 2))
463 (every #'digit-char-p (subseq arg 3)))))
465 (let ((negp (char= (char arg 0) #\+))
466 (num (parse-integer arg :start 1)))
467 (when (and negp (eq (op-negated-numeric-p op) :-))
471 (op-negated-numeric-p op)
475 (ret (if negp :negated-numeric :numeric) num)))))
477 ;; Long option. Find the matching option-spec and process
479 ((and (char= (char arg 0) #\-)
480 (char= (char arg 1) #\-))
482 (process-long-option arg 2 nil))
484 ;; Short options. All that's left.
487 (let ((negp (char= (char arg 0) #\+))
489 (cond ((and (op-long-only-p op)
490 (not (member ch (op-options op)
491 :key #'opt-short-name)))
492 (process-long-option arg 1 negp))
494 (setf (op-short-opt op) arg
495 (op-short-opt-index op) 1
496 (op-short-opt-neg-p op) negp))))))))))))))
498 (export 'option-parse-try)
499 (defmacro option-parse-try (&body body)
500 "Report errors encountered while parsing options, and try to continue.
502 Also establishes a restart `stop-parsing'. Returns t if parsing completed
503 successfully, or nil if errors occurred."
504 (with-gensyms (retcode)
512 (dolist (rn '(skip-option stop-parsing))
513 (let ((r (find-restart rn)))
514 (when r (invoke-restart r)))))))
517 :report "Give up parsing options."
518 (setf ,retcode nil)))
521 (export 'with-unix-error-reporting)
522 (defmacro with-unix-error-reporting ((&key) &body body)
523 "Evaluate BODY with errors reported in the standard Unix fashion."
527 (simple-condition (,cond)
529 (simple-condition-format-control ,cond)
530 (simple-condition-format-arguments ,cond)))
534 ;;;--------------------------------------------------------------------------
535 ;;; Standard option handlers.
537 (export 'defopthandler)
538 (defmacro defopthandler (name (var &optional (arg (gensym)))
541 "Define an option handler function NAME.
543 Option handlers update a generalized variable, which may be referred to as
544 VAR in the BODY, based on some parameters (the ARGS) and the value of an
545 option-argument named ARG."
546 (let ((func (intern (format nil "OPTHANDLER/~:@(~A~)" name))))
547 (multiple-value-bind (docs decls body) (parse-body body)
549 (setf (get ',name 'opthandler) ',func)
550 (defun ,func (,var ,arg ,@args)
552 (declare (ignorable ,arg))
554 (block ,name ,@body)))
557 (defun parse-c-integer (string &key radix (start 0) end)
558 "Parse (a substring of) STRING according to the standard C rules.
560 Well, almost: the 0 and 0x prefixes are accepted, but so too are
561 0o (Haskell) and 0b (original); also RADIX_DIGITS is accepted, for any
562 radix between 2 and 36. Prefixes are only accepted if RADIX is nil.
563 Returns two values: the integer parsed (or nil if there wasn't enough for
564 a sensible parse), and the index following the characters of the integer."
565 (unless end (setf end (length string)))
566 (labels ((simple (i r goodp sgn)
570 (digit-char-p (char string i) r))
571 (parse-integer string
576 (values (if a (* sgn a) (and goodp 0)) i)))
579 (cond (r (simple i r nil sgn))
580 ((>= i end) (values nil i))
581 ((and (char= (char string i) #\0)
583 (case (char string (1+ i))
584 (#\x (simple (+ i 2) 16 nil sgn))
585 (#\o (simple (+ i 2) 8 nil sgn))
586 (#\b (simple (+ i 2) 2 nil sgn))
587 (t (simple (1+ i) 8 t sgn))))
592 (cond ((not r) (values nil i))
594 (char= (char string i) #\_)
596 (simple (1+ i) r nil sgn))
598 (values (* r sgn) i))))))))
600 (cond ((>= start end) (values nil start))
601 ((char= (char string start) #\-)
602 (get-radix (1+ start) radix -1))
603 ((char= (char string start) #\+)
604 (get-radix (1+ start) radix +1))
606 (get-radix start radix +1)))))
608 (export 'invoke-option-handler)
609 (defun invoke-option-handler (handler loc arg args)
610 "Call HANDLER, giving it LOC to update, the option-argument ARG, and the
612 (apply (if (functionp handler) handler
613 (fdefinition (get handler 'opthandler)))
616 ;;;--------------------------------------------------------------------------
617 ;;; Built-in option handlers.
620 (defopthandler set (var) (&optional (value t))
621 "Sets VAR to VALUE; defaults to t."
625 (defopthandler clear (var) (&optional (value nil))
626 "Sets VAR to VALUE; defaults to nil."
630 (defopthandler inc (var) (&optional max (step 1))
631 "Increments VAR by STEP (defaults to 1), but not greater than MAX (default
632 nil for no maximum). No errors are signalled."
634 (when (and max (>= var max))
638 (defopthandler dec (var) (&optional min (step 1))
639 "Decrements VAR by STEP (defaults to 1), but not less than MIN (default nil
640 for no maximum). No errors are signalled."
642 (when (and min (<= var min))
646 (defopthandler read (var arg) ()
647 "Stores in VAR the Lisp object found by reading the ARG.
649 Evaluation is forbidden while reading ARG. If there is an error during
650 reading, an error of type option-parse-error is signalled."
652 (let ((*read-eval* nil))
653 (multiple-value-bind (x end) (read-from-string arg t)
654 (unless (>= end (length arg))
655 (option-parse-error "Junk at end of argument `~A'" arg))
658 (option-parse-error (format nil "~A" cond)))))
661 (defopthandler int (var arg) (&key radix min max)
662 "Stores in VAR the integer read from the ARG.
664 Integers are parsed according to C rules, which is normal in Unix; the
665 RADIX may be nil to allow radix prefixes, or an integer between 2 and 36.
666 An option-parse-error is signalled if the ARG is not a valid integer, or
667 if it is not between MIN and MAX (either of which may be nil if no lower
668 resp. upper bound is wanted)."
669 (multiple-value-bind (v end) (parse-c-integer arg :radix radix)
670 (unless (and v (>= end (length arg)))
671 (option-parse-error "Bad integer `~A'" arg))
672 (when (or (and min (< v min))
675 #.(concatenate 'string
676 "Integer ~A out of range "
677 "(must have ~@[~D <= ~]x~@[ <= ~D~])")
682 (defopthandler string (var arg) ()
683 "Stores ARG in VAR, just as it is."
687 (defopthandler keyword (var arg) (&optional (valid t))
688 "Converts ARG into a keyword.
690 If VALID is t, then any ARG string is acceptable: the argument is
691 uppercased and interned in the keyword package. If VALID is a list, then
692 we ensure that ARG matches one of the elements of the list; unambigious
693 abbreviations are allowed."
696 (setf var (intern (string-upcase arg) :keyword)))
699 (guess (string-upcase arg))
702 (let* ((kn (symbol-name k))
704 (cond ((string= kn guess)
705 (setf matches (list k))
708 (string= guess kn :end2 len))
712 (option-parse-error #.(concatenate 'string
713 "Argument `~A' invalid: "
717 ((null (cdr matches))
718 (setf var (car matches)))
720 (option-parse-error #.(concatenate 'string
721 "Argument `~A' ambiguous: "
727 (defopthandler list (var arg) (&optional handler &rest handler-args)
728 "Collect ARGs in a list at VAR.
730 ARGs are translated by the HANDLER first, if specified. If not, it's as
731 if you asked for `string'."
733 (invoke-option-handler handler (locf arg) arg handler-args))
734 (setf var (nconc var (list arg))))
736 ;;;--------------------------------------------------------------------------
737 ;;; Option descriptions.
739 (export 'defoptmacro)
740 (defmacro defoptmacro (name args &body body)
741 "Defines an option macro NAME.
743 Option macros should produce a list of expressions producing one option
745 (multiple-value-bind (docs decls body) (parse-body body)
747 (setf (get ',name 'optmacro) (lambda ,args
749 (block ,name ,@body)))
752 (export 'parse-option-form)
753 (eval-when (:compile-toplevel :load-toplevel :execute)
754 (defun parse-option-form (form)
755 "Does the heavy lifting for parsing an option form.
757 See the docstring for the `option' macro for details of the syntax."
759 (cond ((stringp form) form)
760 ((null (cdr form)) (car form))
761 (t `(format nil ,@form))))
765 (stringp (car form))))))
766 (cond ((stringp form)
767 `(%make-option :documentation ,form))
769 (error "option form must be string or list"))
770 ((and (docp (car form)) (null (cdr form)))
771 `(%make-option :documentation ,(doc (car form))))
773 (let (long-name short-name
774 arg-name arg-optional-p
778 (cond ((and (or (not tag) (not negated-tag))
781 (member (car f) '(lambda function)))))
785 ((and (not long-name)
789 (setf long-name (if (stringp f) f
790 (format nil "~(~A~)" f))))
791 ((and (not short-name)
797 ((and (consp f) (symbolp (car f)))
799 (:short-name (setf short-name (cadr f)))
800 (:long-name (setf long-name (cadr f)))
801 (:tag (setf tag (cadr f)))
802 (:negated-tag (setf negated-tag (cadr f)))
803 (:arg (setf arg-name (cadr f)))
804 (:opt-arg (setf arg-name (cadr f))
805 (setf arg-optional-p t))
806 (:doc (setf doc (doc (cdr f))))
807 (t (let ((handler (get (car f) 'opthandler)))
809 (error "No handler `~S' defined." (car f)))
810 (let* ((var (cadr f))
812 (thunk `#'(lambda (,arg)
813 (,handler (locf ,var)
817 (setf negated-tag thunk)
818 (setf tag thunk)))))))
820 (error "Unexpected thing ~S in option form." f))))
821 `(make-option ,long-name ,short-name ,arg-name
822 ,@(and arg-optional-p `(:arg-optional-p t))
823 ,@(and tag `(:tag ,tag))
824 ,@(and negated-tag `(:negated-tag ,negated-tag))
825 ,@(and doc `(:documentation ,doc)))))))))
828 (defmacro options (&rest optlist)
829 "More convenient way of initializing options. The OPTLIST is a list of
830 OPTFORMS. Each OPTFORM is one of the following:
832 STRING A banner to print.
834 SYMBOL or (SYMBOL STUFF...)
835 If SYMBOL is an optform macro, the result of invoking it.
837 (...) A full option-form. See below.
839 Full option-forms are a list of the following kinds of items.
847 Set the appropriate slot of the option to the given value.
848 The argument is evaluated.
850 (:doc FORMAT-CONTROL ARGUMENTS...)
851 As for (:doc (format nil FORMAT-CONTROL ARGUMENTS...)).
853 KEYWORD, (function ...), (lambda ...)
854 If no TAG is set yet, then as a TAG; otherwise as the
857 STRING (or SYMBOL or RATIONAL)
858 If no LONG-NAME seen yet, then the LONG-NAME. For symbols
859 and rationals, the item is converted to a string and squashed
862 CHARACTER If no SHORT-NAME, then the SHORT-NAME.
864 STRING or (STRING STUFF...)
865 If no DOCUMENTATION set yet, then the DOCUMENTATION string,
866 as for (:doc STRING STUFF...)
869 Set the ARG-NAME, and also set ARG-OPTIONAL-P.
871 (HANDLER VAR ARGS...)
872 If no TAG is set yet, attach the HANDLER to this option,
873 giving it ARGS. Otherwise, set the NEGATED-TAG."
875 `(list ,@(mapcan (lambda (form)
878 (cond ((symbolp form) (values form nil))
879 ((and (consp form) (symbolp (car form)))
880 (values (car form) (cdr form)))
881 (t (values nil nil)))
882 (let ((macro (and sym (get sym 'optmacro))))
885 (list (parse-option-form form))))))
888 ;;;--------------------------------------------------------------------------
889 ;;; Support stuff for help and usage messages.
891 (defun print-text (string
893 (stream *standard-output*)
897 "Prints STRING to a pretty-printed STREAM, breaking it at whitespace and
898 newlines in the obvious way. Stuff between square brackets is not broken:
899 this makes usage messages work better."
904 (write-string string stream :start start :end i)
906 (unless end (setf end (length string)))
911 (let ((ch (char string i)))
912 (cond ((char= ch #\newline)
915 (pprint-newline :mandatory stream))
916 ((whitespace-char-p ch)
922 (pprint-newline :fill stream))
926 (#\] (when (plusp nest) (decf nest))))))
929 (export 'simple-usage)
930 (defun simple-usage (opts &optional mandatory-args)
931 "Build a simple usage list from a list of options, and (optionally)
932 mandatory argument names."
933 (let (short-simple long-simple short-arg long-arg)
935 (cond ((not (and (opt-documentation o)
937 ((and (opt-short-name o) (opt-arg-name o))
940 (push o short-simple))
944 (push o long-simple))))
946 (nconc (and short-simple
947 (list (format nil "[-~{~C~}]"
948 (sort (mapcar #'opt-short-name short-simple)
952 (format nil "[--~A]" (opt-long-name o)))
953 (sort long-simple #'string< :key #'opt-long-name)))
956 (format nil "~:[[-~C ~A]~;[-~C[~A]]~]"
957 (opt-arg-optional-p o)
960 (sort short-arg #'char-lessp
961 :key #'opt-short-name)))
964 (format nil "~:[[--~A ~A]~;[--~A[=~A]]~]"
965 (opt-arg-optional-p o)
968 (sort long-arg #'string-lessp
969 :key #'opt-long-name)))
970 (if (listp mandatory-args)
972 (list mandatory-args))))))
975 (defun show-usage (prog usage &optional (stream *standard-output*))
976 "Basic usage-showing function.
978 PROG is the program name, probably from `*program-name*'. USAGE is a list
979 of possible usages of the program, each of which is a list of items to be
980 supplied by the user. In simple cases, a single string is sufficient."
981 (pprint-logical-block (stream nil :prefix "Usage: ")
982 (dolist (u (if (listp usage) usage (list usage)))
983 (pprint-logical-block (stream nil
984 :prefix (concatenate 'string prog " "))
985 (format stream "~{~A~^ ~:_~}" (if (listp u) u (list u))))))
988 (defun show-options-help (opts &optional (stream *standard-output*))
989 "Write help for OPTS to the STREAM.
991 This is the core of the `show-help' function."
994 (let ((doc (opt-documentation o)))
996 ((not (opt-long-name o))
1000 (pprint-logical-block (stream nil)
1001 (print-text doc stream))
1005 (pprint-logical-block (stream nil :prefix " ")
1006 (format stream "~:[ ~;-~:*~C,~] --~A"
1009 (when (opt-arg-name o)
1010 (format stream "~:[=~A~;[=~A]~]"
1011 (opt-arg-optional-p o)
1013 (write-string " " stream)
1014 (pprint-tab :line 30 1 stream)
1015 (pprint-indent :block 30 stream)
1016 (print-text doc stream))
1017 (terpri stream)))))))
1020 (defun show-help (prog ver usage opts &optional (stream *standard-output*))
1021 "Basic help-showing function.
1023 PROG is the program name, probably from `*program-name*'. VER is the
1024 program's version number. USAGE is a list of the possible usages of the
1025 program, each of which may be a list of items to be supplied. OPTS is the
1026 list of supported options, as provided to the options parser. STREAM is
1027 the stream to write on."
1028 (format stream "~A, version ~A~2%" prog ver)
1029 (show-usage prog usage stream)
1031 (show-options-help opts stream))
1033 (export 'sanity-check-option-list)
1034 (defun sanity-check-option-list (opts)
1035 "Check the option list OPTS for basic sanity. Reused short and long option
1036 names are diagnosed. Maybe other problems will be reported later.
1037 Returns a list of warning strings."
1038 (let ((problems nil)
1039 (longs (make-hash-table :test #'equal))
1040 (shorts (make-hash-table)))
1041 (flet ((problem (msg &rest args)
1042 (push (apply #'format nil msg args) problems)))
1044 (push o (gethash (opt-long-name o) longs))
1045 (push o (gethash (opt-short-name o) shorts)))
1046 (maphash (lambda (k v)
1047 (when (and k (cdr v))
1048 (problem "Long name `--~A' reused in ~S" k v)))
1050 (maphash (lambda (k v)
1051 (when (and k (cdr v))
1052 (problem "Short name `-~C' reused in ~S" k v)))
1056 ;;;--------------------------------------------------------------------------
1057 ;;; Full program descriptions.
1059 (export '(*help* *version* *usage*))
1060 (defvar *help* nil "Help text describing the program.")
1061 (defvar *version* "<unreleased>" "The program's version number.")
1062 (defvar *usage* nil "A usage summary string")
1065 (defun do-usage (&optional (stream *standard-output*))
1066 (show-usage *program-name* *usage* stream))
1070 (do-usage *error-output*)
1073 (defun opt-help (arg)
1074 (declare (ignore arg))
1075 (show-help *program-name* *version* *usage* *options*)
1077 (string (terpri) (write-string *help*))
1079 ((or function symbol) (terpri) (funcall *help*)))
1082 (defun opt-version (arg)
1083 (declare (ignore arg))
1084 (format t "~A, version ~A~%" *program-name* *version*)
1086 (defun opt-usage (arg)
1087 (declare (ignore arg))
1091 (export 'help-options)
1092 (defoptmacro help-options (&key (short-help #\h)
1095 "Inserts a standard help options collection in an options list."
1096 (flet ((shortform (char)
1097 (and char (list char))))
1101 (,@(shortform short-help) "help" #'opt-help
1102 "Show this help message.")
1103 (,@(shortform short-version) "version" #'opt-version
1104 ("Show ~A's version number." *program-name*))
1105 (,@(shortform short-usage) "usage" #'opt-usage
1106 ("Show a very brief usage summary for ~A." *program-name*))))))
1108 (export 'define-program)
1109 (defun define-program (&key
1110 (program-name nil progp)
1112 (version nil versionp)
1114 (full-usage nil fullp)
1115 (options nil optsp))
1116 "Sets up all the required things a program needs to have to parse options
1117 and respond to them properly."
1118 (when progp (setf *program-name* program-name))
1119 (when helpp (setf *help* help))
1120 (when versionp (setf *version* version))
1121 (when optsp (setf *options* options))
1122 (cond ((and usagep fullp) (error "conflicting options"))
1123 (usagep (setf *usage* (simple-usage *options* usage)))
1124 (fullp (setf *usage* full-usage))))
1126 (export 'do-options)
1127 (defmacro do-options ((&key (parser '(make-option-parser)))
1129 "Handy all-in-one options parser macro.
1131 PARSER defaults to a new options parser using the preset default options
1132 structure. The CLAUSES are `case2'-like clauses to match options, and
1133 must be exhaustive. If there is a clause (nil (REST) FORMS...) then the
1134 FORMS are evaluated after parsing is done with REST bound to the remaining
1135 command-line arguments."
1139 (,(if (find t clauses :key #'car) 'case2 'ecase2)
1140 (option-parse-next ,parser)
1142 ,@(remove-if #'null clauses :key #'car)))
1143 ,@(let ((tail (find nil clauses :key #'car)))
1145 (destructuring-bind ((&optional arg) &rest forms) (cdr tail)
1147 (list `(let ((,arg (option-parse-remainder ,parser)))
1151 ;;;----- That's all, folks --------------------------------------------------