Commit | Line | Data |
---|---|---|
861345b4 | 1 | ;;; -*-lisp-*- |
2 | ;;; | |
3 | ;;; $Id$ | |
4 | ;;; | |
5 | ;;; Option parser, standard issue | |
6 | ;;; | |
7 | ;;; (c) 2005 Straylight/Edgeware | |
8 | ;;; | |
9 | ||
10 | ;;;----- Licensing notice --------------------------------------------------- | |
11 | ;;; | |
12 | ;;; This program 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. | |
16 | ;;; | |
17 | ;;; This program 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. | |
21 | ;;; | |
22 | ;;; You should have received a copy of the GNU General Public License | |
23 | ;;; along with this program; if not, write to the Free Software Foundation, | |
24 | ;;; Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
25 | ||
02866e07 MW |
26 | ;;;-------------------------------------------------------------------------- |
27 | ;;; Packages. | |
28 | ||
0b3651e5 | 29 | (defpackage #:optparse |
861345b4 | 30 | (:use #:common-lisp #:mdw.base #:mdw.sys-base #:mdw.str) |
31 | (:export #:exit #:*program-name* #:*command-line-strings* | |
32 | #:moan #:die | |
33 | #:option #:optionp #:make-option | |
34 | #:opt-short-name #:opt-long-name #:opt-tag #:opt-negated-tag | |
35 | #:opt-arg-name #:opt-arg-optional-p #:opt-documentation | |
36 | #:option-parser #:make-option-parser #:option-parser-p | |
37 | #:op-options #:op-non-option #:op-long-only-p #:op-numeric-p | |
38 | #:op-negated-numeric-p #:op-negated-p | |
39 | #:option-parse-error | |
40 | #:option-parse-remainder #:option-parse-next #:option-parse-try | |
41 | #:with-unix-error-reporting | |
42 | #:defopthandler #:invoke-option-handler | |
43 | #:set #:clear #:inc #:dec #:read #:int #:string | |
44 | #:keyword #:list | |
45 | #:parse-option-form #:options | |
46 | #:simple-usage #:show-usage #:show-version #:show-help | |
5fa07b7a MW |
47 | #:sanity-check-option-list |
48 | #:*help* #:*version* #:*usage* #:*options* | |
49 | #:do-options #:help-opts #:define-program #:do-usage #:die-usage)) | |
861345b4 | 50 | |
0b3651e5 | 51 | (in-package #:optparse) |
861345b4 | 52 | |
02866e07 | 53 | ;;;-------------------------------------------------------------------------- |
861345b4 | 54 | ;;; Standard error-reporting functions. |
55 | ||
56 | (defun moan (msg &rest args) | |
57 | "Report an error message in the usual way." | |
58 | (format *error-output* "~&~A: ~?~%" *program-name* msg args)) | |
5fa07b7a | 59 | |
861345b4 | 60 | (defun die (&rest args) |
61 | "Report an error message and exit." | |
62 | (apply #'moan args) | |
63 | (exit 1)) | |
64 | ||
02866e07 | 65 | ;;;-------------------------------------------------------------------------- |
861345b4 | 66 | ;;; The main option parser. |
67 | ||
5fa07b7a MW |
68 | (defvar *options*) |
69 | ||
861345b4 | 70 | (defstruct (option (:predicate optionp) |
71 | (:conc-name opt-) | |
72 | (:print-function | |
73 | (lambda (o s k) | |
74 | (declare (ignore k)) | |
75 | (format s | |
76 | "#<option~@[ -~C,~]~@[ --~A~]~:[~2*~;~:[=~A~;[=~A]~]~]~@[ ~S~]>" | |
77 | (opt-short-name o) | |
78 | (opt-long-name o) | |
79 | (opt-arg-name o) | |
80 | (opt-arg-optional-p o) | |
81 | (opt-arg-name o) | |
82 | (opt-documentation o)))) | |
83 | (:constructor %make-option) | |
84 | (:constructor make-option | |
85 | (long-name | |
86 | short-name | |
87 | &optional | |
88 | arg-name | |
89 | &key | |
90 | (tag (intern (string-upcase long-name) | |
91 | :keyword)) | |
92 | negated-tag | |
93 | arg-optional-p | |
94 | doc | |
95 | (documentation doc)))) | |
96 | "Describes a command-line option. Slots: | |
97 | ||
98 | LONG-NAME The option's long name. If this is null, the `option' is | |
99 | just a banner to be printed in the program's help text. | |
100 | ||
101 | TAG The value to be returned if this option is encountered. If | |
102 | this is a function, instead, the function is called with the | |
103 | option's argument or nil. | |
104 | ||
105 | NEGATED-TAG As for TAG, but used if the negated form of the option is | |
106 | found. If this is nil (the default), the option cannot be | |
107 | negated. | |
108 | ||
109 | SHORT-NAME The option's short name. This must be a single character, or | |
110 | nil if the option has no short name. | |
111 | ||
112 | ARG-NAME The name of the option's argument, a string. If this is nil, | |
113 | the option doesn't accept an argument. The name is shown in | |
114 | the help text. | |
115 | ||
116 | ARG-OPTIONAL-P If non-nil, the option's argument is optional. This is | |
117 | ignored unless ARG-NAME is non-null. | |
118 | ||
119 | DOCUMENTATION The help text for this option. It is automatically | |
120 | line-wrapped. If nil, the option is omitted from the help | |
121 | text. | |
122 | ||
123 | Usually, one won't use make-option, but use the option macro instead." | |
124 | (long-name nil :type (or null string)) | |
125 | (tag nil :type t) | |
126 | (negated-tag nil :type t) | |
127 | (short-name nil :type (or null character)) | |
128 | (arg-name nil :type (or null string)) | |
129 | (arg-optional-p nil :type t) | |
130 | (documentation nil :type (or null string))) | |
131 | ||
132 | (defstruct (option-parser (:conc-name op-) | |
133 | (:constructor make-option-parser | |
5fa07b7a MW |
134 | (&key |
135 | ((:args argstmp) | |
136 | (cdr *command-line-strings*)) | |
137 | (options *options*) | |
861345b4 | 138 | (non-option :skip) |
139 | ((:numericp numeric-p)) | |
140 | negated-numeric-p | |
141 | long-only-p | |
142 | &aux | |
143 | (args (cons nil argstmp)) | |
144 | (next args) | |
145 | (negated-p (or negated-numeric-p | |
146 | (some | |
147 | #'opt-negated-tag | |
148 | options)))))) | |
149 | "An option parser object. Slots: | |
150 | ||
151 | ARGS The arguments to be parsed. Usually this will be | |
152 | *command-line-strings*. | |
153 | ||
154 | OPTIONS List of option structures describing the acceptable options. | |
155 | ||
156 | NON-OPTION Behaviour when encountering a non-option argument. The | |
157 | default is :skip. Allowable values are: | |
158 | :skip -- pretend that it appeared after the option | |
159 | arguments; this is the default behaviour of GNU getopt | |
160 | :stop -- stop parsing options, leaving the remaining | |
161 | command line unparsed | |
162 | :return -- return :non-option and the argument word | |
163 | ||
164 | NUMERIC-P Non-nil tag (as for options) if numeric options (e.g., -43) | |
165 | are to be allowed. The default is nil. (Anomaly: the | |
166 | keyword for this argument is :numericp.) | |
167 | ||
168 | NEGATED-NUMERIC-P | |
169 | Non-nil tag (as for options) if numeric options (e.g., -43) | |
170 | can be negated. This is not the same thing as a negative | |
171 | numeric option! | |
172 | ||
173 | LONG-ONLY-P A misnomer inherited from GNU getopt. Whether to allow | |
174 | long options to begin with a single dash. Short options are | |
175 | still allowed, and may be cuddled as usual. The default is | |
176 | nil." | |
177 | (args nil :type list) | |
178 | (options nil :type list) | |
179 | (non-option :skip :type (or function (member :skip :stop :return))) | |
180 | (next nil :type list) | |
181 | (short-opt nil :type (or null string)) | |
182 | (short-opt-index 0 :type fixnum) | |
183 | (short-opt-neg-p nil :type t) | |
184 | (long-only-p nil :type t) | |
185 | (numeric-p nil :type t) | |
186 | (negated-numeric-p nil :type t) | |
187 | (negated-p nil :type t)) | |
188 | ||
189 | (define-condition option-parse-error (error simple-condition) | |
190 | () | |
191 | (:documentation "Indicates an error found while parsing options. Probably | |
192 | not that useful.")) | |
193 | ||
194 | (defun option-parse-error (msg &rest args) | |
195 | "Signal an option-parse-error with the given message and arguments." | |
196 | (error (make-condition 'option-parse-error | |
197 | :format-control msg | |
198 | :format-arguments args))) | |
199 | ||
200 | (defun option-parse-remainder (op) | |
201 | "Returns the unparsed remainder of the command line." | |
202 | (cdr (op-args op))) | |
203 | ||
204 | (defun option-parse-next (op) | |
205 | "The main option-parsing function. OP is an option-parser object, | |
206 | initialized appropriately. Returns two values, OPT and ARG: OPT is the tag | |
207 | of the next option read, and ARG is the argument attached to it, or nil if | |
208 | there was no argument. If there are no more options, returns nil twice. | |
209 | Options whose TAG is a function aren't returned; instead, the tag function is | |
210 | called, with the option argument (or nil) as the only argument. It is safe | |
211 | for tag functions to throw out of option-parse-next, if they desparately need | |
212 | to. (This is the only way to actually get option-parse-next to return a | |
213 | function value, should that be what you want.) | |
214 | ||
215 | While option-parse-next is running, there is a restart `skip-option' which | |
216 | moves on to the next option. Error handlers should use this to resume after | |
217 | parsing errors." | |
218 | (loop | |
219 | (labels ((ret (opt &optional arg) | |
220 | (return-from option-parse-next (values opt arg))) | |
221 | (finished () | |
222 | (setf (op-next op) nil) | |
223 | (ret nil nil)) | |
224 | (peek-arg () | |
225 | (cadr (op-next op))) | |
226 | (more-args-p () | |
227 | (and (op-next op) | |
228 | (cdr (op-next op)))) | |
229 | (skip-arg () | |
230 | (setf (op-next op) (cdr (op-next op)))) | |
231 | (eat-arg () | |
232 | (setf (cdr (op-next op)) (cddr (op-next op)))) | |
233 | (get-arg () | |
234 | (prog1 (peek-arg) (eat-arg))) | |
235 | (process-option (o name negp &key arg argfunc) | |
236 | (cond ((not (opt-arg-name o)) | |
237 | (when arg | |
238 | (option-parse-error | |
239 | "Option `~A' does not accept arguments" | |
240 | name))) | |
241 | (arg) | |
242 | (argfunc | |
243 | (setf arg (funcall argfunc))) | |
244 | ((opt-arg-optional-p o)) | |
245 | ((more-args-p) | |
246 | (setf arg (get-arg))) | |
247 | (t | |
248 | (option-parse-error "Option `~A' requires an argument" | |
249 | name))) | |
250 | (let ((how (if negp (opt-negated-tag o) (opt-tag o)))) | |
251 | (if (functionp how) | |
252 | (funcall how arg) | |
253 | (ret how arg)))) | |
254 | (process-long-option (arg start negp) | |
255 | (when (and (not negp) | |
256 | (op-negated-p op) | |
257 | (> (length arg) (+ start 3)) | |
258 | (string= arg "no-" | |
259 | :start1 start :end1 (+ start 3))) | |
260 | (incf start 3) | |
261 | (setf negp t)) | |
262 | (let* ((matches nil) | |
263 | (eqpos (position #\= arg :start start)) | |
264 | (len (or eqpos (length arg))) | |
265 | (optname (subseq arg 0 len)) | |
266 | (len-2 (- len start))) | |
267 | (dolist (o (op-options op)) | |
268 | (cond ((or (not (stringp (opt-long-name o))) | |
269 | (and negp (not (opt-negated-tag o))) | |
270 | (< (length (opt-long-name o)) len-2) | |
271 | (string/= optname (opt-long-name o) | |
272 | :start1 start :end2 len-2))) | |
273 | ((= (length (opt-long-name o)) len-2) | |
274 | (setf matches (list o)) | |
275 | (return)) | |
276 | (t | |
277 | (push o matches)))) | |
278 | (cond ((null matches) | |
279 | (option-parse-error "Unknown option `~A'" optname)) | |
280 | ((cdr matches) | |
281 | (option-parse-error | |
282 | "~ | |
283 | Ambiguous long option `~A' -- could be any of:~{~% --~A~}" | |
284 | optname | |
285 | (mapcar #'opt-long-name matches)))) | |
286 | (process-option (car matches) | |
287 | optname | |
288 | negp | |
289 | :arg (and eqpos | |
290 | (subseq arg (1+ eqpos))))))) | |
291 | (with-simple-restart (skip-option "Skip this bogus option.") | |
292 | (cond | |
293 | ;; | |
294 | ;; We're embroiled in short options: handle them. | |
295 | ((op-short-opt op) | |
296 | (if (>= (op-short-opt-index op) (length (op-short-opt op))) | |
297 | (setf (op-short-opt op) nil) | |
298 | (let* ((str (op-short-opt op)) | |
299 | (i (op-short-opt-index op)) | |
300 | (ch (char str i)) | |
301 | (negp (op-short-opt-neg-p op)) | |
302 | (name (format nil "~C~A" (if negp #\+ #\-) ch)) | |
303 | (o (find ch (op-options op) :key #'opt-short-name))) | |
304 | (incf i) | |
305 | (setf (op-short-opt-index op) i) | |
306 | (when (or (not o) | |
307 | (and negp (not (opt-negated-tag o)))) | |
308 | (option-parse-error "Unknown option `~A'" name)) | |
309 | (process-option o | |
310 | name | |
311 | negp | |
312 | :argfunc | |
313 | (and (< i (length str)) | |
314 | (lambda () | |
315 | (prog1 | |
316 | (subseq str i) | |
317 | (setf (op-short-opt op) | |
318 | nil)))))))) | |
319 | ;; | |
320 | ;; End of the list. Say we've finished. | |
321 | ((not (more-args-p)) | |
322 | (finished)) | |
323 | ;; | |
324 | ;; Process the next option. | |
325 | (t | |
326 | (let ((arg (peek-arg))) | |
327 | (cond | |
328 | ;; | |
329 | ;; Non-option. Decide what to do. | |
330 | ((or (<= (length arg) 1) | |
331 | (and (char/= (char arg 0) #\-) | |
332 | (or (char/= (char arg 0) #\+) | |
333 | (not (op-negated-p op))))) | |
334 | (case (op-non-option op) | |
335 | (:skip (skip-arg)) | |
336 | (:stop (finished)) | |
337 | (:return (eat-arg) | |
338 | (ret :non-option arg)) | |
339 | (t (eat-arg) | |
340 | (funcall (op-non-option op) arg)))) | |
341 | ;; | |
342 | ;; Double-hyphen. Stop right now. | |
343 | ((string= arg "--") | |
344 | (eat-arg) | |
345 | (finished)) | |
346 | ;; | |
347 | ;; Numbers. Check these before long options, since `--43' is | |
348 | ;; not a long option. | |
349 | ((and (op-numeric-p op) | |
350 | (or (char= (char arg 0) #\-) | |
351 | (op-negated-numeric-p op)) | |
352 | (or (and (digit-char-p (char arg 1)) | |
353 | (every #'digit-char-p (subseq arg 2))) | |
354 | (and (or (char= (char arg 1) #\-) | |
355 | (char= (char arg 1) #\+)) | |
356 | (>= (length arg) 3) | |
357 | (digit-char-p (char arg 2)) | |
358 | (every #'digit-char-p (subseq arg 3))))) | |
359 | (eat-arg) | |
360 | (let ((negp (char= (char arg 0) #\+)) | |
361 | (num (parse-integer arg :start 1))) | |
362 | (when (and negp (eq (op-negated-numeric-p op) :-)) | |
363 | (setf num (- num)) | |
364 | (setf negp nil)) | |
365 | (let ((how (if negp | |
366 | (op-negated-numeric-p op) | |
367 | (op-numeric-p op)))) | |
368 | (if (functionp how) | |
369 | (funcall how num) | |
370 | (ret (if negp :negated-numeric :numeric) num))))) | |
371 | ;; | |
372 | ;; Long option. Find the matching option-spec and process | |
373 | ;; it. | |
374 | ((and (char= (char arg 0) #\-) | |
375 | (char= (char arg 1) #\-)) | |
376 | (eat-arg) | |
377 | (process-long-option arg 2 nil)) | |
378 | ;; | |
379 | ;; Short options. All that's left. | |
380 | (t | |
381 | (eat-arg) | |
382 | (let ((negp (char= (char arg 0) #\+)) | |
383 | (ch (char arg 1))) | |
384 | (cond ((and (op-long-only-p op) | |
385 | (not (member ch (op-options op) | |
386 | :key #'opt-short-name))) | |
387 | (process-long-option arg 1 negp)) | |
388 | (t | |
389 | (setf (op-short-opt op) arg | |
390 | (op-short-opt-index op) 1 | |
391 | (op-short-opt-neg-p op) negp))))))))))))) | |
392 | ||
393 | (defmacro option-parse-try (&body body) | |
394 | "Report errors encountered while parsing options, and continue struggling | |
395 | along. Also establishes a restart `stop-parsing'. Returns t if parsing | |
396 | completed successfully, or nil if errors occurred." | |
397 | (with-gensyms (retcode) | |
398 | `(let ((,retcode t)) | |
399 | (restart-case | |
400 | (handler-bind | |
401 | ((option-parse-error | |
402 | (lambda (cond) | |
403 | (setf ,retcode nil) | |
404 | (moan "~A" cond) | |
405 | (dolist (rn '(skip-option stop-parsing)) | |
406 | (let ((r (find-restart rn))) | |
407 | (when r (invoke-restart r))))))) | |
408 | ,@body) | |
409 | (stop-parsing () | |
410 | :report "Give up parsing options." | |
411 | (setf ,retcode nil))) | |
412 | ,retcode))) | |
413 | ||
414 | (defmacro with-unix-error-reporting ((&key) &body body) | |
415 | "Evaluate BODY with errors reported in the standard Unix fashion." | |
416 | (with-gensyms (cond) | |
417 | `(handler-case | |
418 | (progn ,@body) | |
419 | (simple-condition (,cond) | |
5fa07b7a MW |
420 | (apply #'die |
421 | (simple-condition-format-control ,cond) | |
422 | (simple-condition-format-arguments ,cond))) | |
861345b4 | 423 | (error (,cond) |
424 | (die "~A" ,cond))))) | |
425 | ||
02866e07 | 426 | ;;;-------------------------------------------------------------------------- |
861345b4 | 427 | ;;; Standard option handlers. |
428 | ||
429 | (defmacro defopthandler (name (var &optional (arg (gensym))) | |
430 | (&rest args) | |
431 | &body body) | |
432 | "Define an option handler function NAME. Option handlers update a | |
433 | generalized variable, which may be referred to as VAR in the BODY, based on | |
434 | some parameters (the ARGS) and the value of an option-argument named ARG." | |
435 | (let ((func (intern (format nil "OPTHANDLER/~:@(~A~)" name)))) | |
436 | `(progn | |
437 | (setf (get ',name 'opthandler) ',func) | |
438 | (defun ,func (,var ,arg ,@args) | |
439 | (with-locatives ,var | |
440 | (declare (ignorable ,arg)) | |
441 | ,@body)) | |
5fa07b7a | 442 | ',name))) |
861345b4 | 443 | |
444 | (defun parse-c-integer (string &key radix (start 0) end) | |
445 | "Parse STRING, or at least the parts of it between START and END, according | |
446 | to the standard C rules. Well, almost: the 0 and 0x prefixes are accepted, | |
447 | but so too are 0o (Haskell) and 0b (original); also RADIX_DIGITS is accepted, | |
448 | for any radix between 2 and 36. Prefixes are only accepted if RADIX is nil. | |
449 | Returns two values: the integer parsed (or nil if there wasn't enough for a | |
450 | sensible parse), and the index following the characters of the integer." | |
451 | (unless end (setf end (length string))) | |
202c91a3 MW |
452 | (labels ((simple (i r goodp sgn) |
453 | (multiple-value-bind | |
454 | (a i) | |
455 | (if (and (< i end) | |
456 | (digit-char-p (char string i) r)) | |
457 | (parse-integer string | |
458 | :start i :end end | |
459 | :radix r | |
460 | :junk-allowed t) | |
461 | (values nil i)) | |
462 | (values (if a (* sgn a) (and goodp 0)) i))) | |
861345b4 | 463 | (get-radix (i r sgn) |
202c91a3 | 464 | (cond (r (simple i r nil sgn)) |
861345b4 | 465 | ((>= i end) (values nil i)) |
466 | ((and (char= (char string i) #\0) | |
467 | (>= (- end i) 2)) | |
468 | (case (char string (1+ i)) | |
202c91a3 MW |
469 | (#\x (simple (+ i 2) 16 nil sgn)) |
470 | (#\o (simple (+ i 2) 8 nil sgn)) | |
471 | (#\b (simple (+ i 2) 2 nil sgn)) | |
472 | (t (simple (1+ i) 8 t sgn)))) | |
861345b4 | 473 | (t |
474 | (multiple-value-bind | |
202c91a3 MW |
475 | (r i) |
476 | (simple i 10 nil +1) | |
861345b4 | 477 | (cond ((not r) (values nil i)) |
478 | ((and (< i end) | |
479 | (char= (char string i) #\_) | |
480 | (<= 2 r 36)) | |
202c91a3 | 481 | (simple (1+ i) r nil sgn)) |
861345b4 | 482 | (t |
483 | (values (* r sgn) i)))))))) | |
484 | (cond ((>= start end) (values nil start)) | |
485 | ((char= (char string start) #\-) | |
486 | (get-radix (1+ start) radix -1)) | |
487 | ((char= (char string start) #\+) | |
488 | (get-radix (1+ start) radix +1)) | |
489 | (t | |
490 | (get-radix start radix +1))))) | |
491 | ||
492 | (defun invoke-option-handler (handler loc arg args) | |
493 | "Call the HANDLER function, giving it LOC to update, the option-argument | |
494 | ARG, and the remaining ARGS." | |
495 | (apply (if (functionp handler) handler | |
496 | (fdefinition (get handler 'opthandler))) | |
497 | loc | |
498 | arg | |
499 | args)) | |
500 | ||
5fa07b7a MW |
501 | ;;;-------------------------------------------------------------------------- |
502 | ;;; Built-in option handlers. | |
503 | ||
861345b4 | 504 | (defopthandler set (var) (&optional (value t)) |
505 | "Sets VAR to VALUE; defaults to t." | |
506 | (setf var value)) | |
5fa07b7a | 507 | |
861345b4 | 508 | (defopthandler clear (var) (&optional (value nil)) |
509 | "Sets VAR to VALUE; defaults to nil." | |
510 | (setf var value)) | |
5fa07b7a | 511 | |
861345b4 | 512 | (defopthandler inc (var) (&optional max (step 1)) |
513 | "Increments VAR by STEP (defaults to 1), but not greater than MAX (default | |
514 | nil for no maximum). No errors are signalled." | |
515 | (incf var step) | |
516 | (when (>= var max) | |
517 | (setf var max))) | |
5fa07b7a | 518 | |
861345b4 | 519 | (defopthandler dec (var) (&optional min (step 1)) |
520 | "Decrements VAR by STEP (defaults to 1), but not less than MIN (default nil | |
521 | for no maximum). No errors are signalled." | |
522 | (decf var step) | |
523 | (when (<= var min) | |
524 | (setf var min))) | |
5fa07b7a | 525 | |
861345b4 | 526 | (defopthandler read (var arg) () |
527 | "Stores in VAR the Lisp object found by reading the ARG. Evaluation is | |
528 | forbidden while reading ARG. If there is an error during reading, an error | |
529 | of type option-parse-error is signalled." | |
530 | (handler-case | |
531 | (let ((*read-eval* nil)) | |
532 | (multiple-value-bind (x end) (read-from-string arg t) | |
533 | (unless (>= end (length arg)) | |
534 | (option-parse-error "Junk at end of argument `~A'" arg)) | |
535 | (setf var x))) | |
536 | (error (cond) | |
537 | (option-parse-error (format nil "~A" cond))))) | |
5fa07b7a | 538 | |
861345b4 | 539 | (defopthandler int (var arg) (&key radix min max) |
540 | "Stores in VAR the integer read from the ARG. Integers are parsed | |
541 | according to C rules, which is normal in Unix; the RADIX may be nil to allow | |
542 | radix prefixes, or an integer between 2 and 36. An option-parse-error is | |
543 | signalled if the ARG is not a valid integer, or if it is not between MIN and | |
544 | MAX (either of which may be nil if no lower resp. upper bound is wanted)." | |
545 | (multiple-value-bind (v end) (parse-c-integer arg :radix radix) | |
546 | (unless (and v (>= end (length arg))) | |
547 | (option-parse-error "Bad integer `~A'" arg)) | |
548 | (when (or (and min (< v min)) | |
549 | (and max (> v max))) | |
550 | (option-parse-error | |
551 | "Integer ~A out of range (must have ~@[~D <= ~]x~@[ <= ~D~])" | |
552 | arg min max)) | |
553 | (setf var v))) | |
5fa07b7a | 554 | |
861345b4 | 555 | (defopthandler string (var arg) () |
556 | "Stores ARG in VAR, just as it is." | |
557 | (setf var arg)) | |
5fa07b7a | 558 | |
861345b4 | 559 | (defopthandler keyword (var arg) (&rest valid) |
560 | (if (null valid) | |
561 | (setf var (intern (string-upcase arg) :keyword)) | |
562 | (let ((matches nil) | |
563 | (guess (string-upcase arg)) | |
564 | (len (length arg))) | |
565 | (dolist (k valid) | |
566 | (let* ((kn (symbol-name k)) | |
567 | (klen (length kn))) | |
568 | (cond ((string= kn guess) | |
569 | (setf matches (list k)) | |
570 | (return)) | |
571 | ((and (< len klen) | |
572 | (string= guess kn :end2 len)) | |
573 | (push k matches))))) | |
574 | (case (length matches) | |
575 | (0 (option-parse-error "Argument `~A' invalid: must be one of:~ | |
576 | ~{~%~8T~(~A~)~}" | |
577 | arg valid)) | |
578 | (1 (setf var (car matches))) | |
579 | (t (option-parse-error "Argument `~A' ambiguous: may be any of:~ | |
580 | ~{~%~8T~(~A~)~}" | |
581 | arg matches)))))) | |
5fa07b7a | 582 | |
861345b4 | 583 | (defopthandler list (var arg) (&optional handler &rest handler-args) |
584 | "Collect ARGs in a list at VAR. ARGs are translated by the HANDLER first, | |
585 | if specified. If not, it's as if you asked for `string'." | |
586 | (when handler | |
587 | (invoke-option-handler handler (locf arg) arg handler-args)) | |
588 | (setf var (nconc var (list arg)))) | |
589 | ||
5fa07b7a MW |
590 | ;;;-------------------------------------------------------------------------- |
591 | ;;; Option descriptions. | |
592 | ||
593 | (defmacro defoptmacro (name args &body body) | |
594 | "Defines an option macro NAME. Option macros should produce a list of | |
595 | expressions producing one option structure each." | |
596 | `(progn | |
597 | (setf (get ',name 'optmacro) (lambda ,args ,@body)) | |
598 | ',name)) | |
599 | ||
861345b4 | 600 | (compile-time-defun parse-option-form (form) |
601 | "Does the heavy lifting for parsing an option form. See the docstring for | |
602 | the `option' macro for details of the syntax." | |
603 | (flet ((doc (form) | |
604 | (cond ((stringp form) form) | |
605 | ((null (cdr form)) (car form)) | |
606 | (t `(format nil ,@form)))) | |
607 | (docp (form) | |
608 | (or (stringp form) | |
609 | (and (consp form) | |
610 | (stringp (car form)))))) | |
5fa07b7a MW |
611 | (cond ((stringp form) |
612 | `(%make-option :documentation ,form)) | |
613 | ((not (listp form)) | |
614 | (error "option form must be string or list")) | |
615 | ((and (docp (car form)) (null (cdr form))) | |
616 | `(%make-option :documentation ,(doc (car form)))) | |
617 | (t | |
618 | (let (long-name short-name | |
619 | arg-name arg-optional-p | |
620 | tag negated-tag | |
621 | doc) | |
622 | (dolist (f form) | |
623 | (cond ((and (or (not tag) (not negated-tag)) | |
624 | (or (keywordp f) | |
625 | (and (consp f) | |
626 | (member (car f) '(lambda function))))) | |
627 | (if tag | |
628 | (setf negated-tag f) | |
629 | (setf tag f))) | |
630 | ((and (not long-name) | |
631 | (or (rationalp f) | |
632 | (symbolp f) | |
633 | (stringp f))) | |
634 | (setf long-name (if (stringp f) f | |
635 | (format nil "~(~A~)" f)))) | |
636 | ((and (not short-name) | |
637 | (characterp f)) | |
638 | (setf short-name f)) | |
639 | ((and (not doc) | |
640 | (docp f)) | |
641 | (setf doc (doc f))) | |
642 | ((and (consp f) (symbolp (car f))) | |
643 | (case (car f) | |
644 | (:arg (setf arg-name (cadr f))) | |
645 | (:opt-arg (setf arg-name (cadr f)) | |
646 | (setf arg-optional-p t)) | |
647 | (:doc (setf doc (doc (cdr f)))) | |
648 | (t (let ((handler (get (car f) 'opthandler))) | |
649 | (unless handler | |
650 | (error "No handler `~S' defined." (car f))) | |
651 | (let* ((var (cadr f)) | |
652 | (arg (gensym)) | |
653 | (thunk `#'(lambda (,arg) | |
654 | (,handler (locf ,var) | |
655 | ,arg | |
656 | ,@(cddr f))))) | |
657 | (if tag | |
658 | (setf negated-tag thunk) | |
659 | (setf tag thunk))))))) | |
660 | (t | |
661 | (error "Unexpected thing ~S in option form." f)))) | |
662 | `(make-option ,long-name ,short-name ,arg-name | |
663 | ,@(and arg-optional-p `(:arg-optional-p t)) | |
664 | ,@(and tag `(:tag ,tag)) | |
665 | ,@(and negated-tag `(:negated-tag ,negated-tag)) | |
666 | ,@(and doc `(:documentation ,doc)))))))) | |
861345b4 | 667 | |
668 | (defmacro options (&rest optlist) | |
669 | "More convenient way of initializing options. The OPTLIST is a list of | |
5fa07b7a MW |
670 | OPTFORMS. Each OPTFORM is one of the following: |
671 | ||
672 | STRING | |
673 | A banner to print. | |
674 | ||
675 | SYMBOL or (SYMBOL STUFF...) | |
676 | If SYMBOL is an optform macro, the result of invoking it. | |
677 | ||
678 | (...) | |
679 | A full option-form. See below. | |
680 | ||
681 | Full option-forms are as follows. | |
861345b4 | 682 | |
683 | KEYWORD or FUNCTION | |
684 | If no TAG is set yet, then as a TAG; otherwise as the NEGATED-TAG. | |
685 | ||
686 | STRING (or SYMBOL or RATIONAL) | |
687 | If no LONG-NAME seen yet, then the LONG-NAME. For symbols and rationals, | |
688 | the item is converted to a string and squashed to lower-case. | |
689 | ||
690 | CHARACTER | |
691 | The SHORT-NAME. | |
692 | ||
693 | STRING or (STRING STUFF...) | |
5fa07b7a MW |
694 | If no DOCUMENTATION set yet, then the DOCUMENTATION string, as for |
695 | (:DOC STRING STUFF...) | |
696 | ||
697 | (:DOC STRING STUFF...) | |
698 | The DOCUMENATION string. With no STUFF, STRING is used as is; otherwise | |
699 | the documentation string is computed by (format nil STRING STUFF...). | |
861345b4 | 700 | |
701 | (:ARG NAME) | |
702 | Set the ARG-NAME. | |
703 | ||
704 | (:OPT-ARG NAME) | |
705 | Set the ARG-NAME, and also set ARG-OPTIONAL-P. | |
706 | ||
707 | (HANDLER VAR ARGS...) | |
708 | If no TAG is set yet, attach the HANDLER to this option, giving it ARGS. | |
709 | Otherwise, set the NEGATED-TAG." | |
5fa07b7a MW |
710 | `(list ,@(mapcan (lambda (form) |
711 | (multiple-value-bind | |
712 | (sym args) | |
713 | (cond ((symbolp form) (values form nil)) | |
714 | ((and (consp form) (symbolp (car form))) | |
715 | (values (car form) (cdr form))) | |
716 | (t (values nil nil))) | |
717 | (let ((macro (and sym (get sym 'optmacro)))) | |
718 | (if macro | |
719 | (apply macro args) | |
720 | (list (parse-option-form form)))))) | |
861345b4 | 721 | optlist))) |
722 | ||
02866e07 | 723 | ;;;-------------------------------------------------------------------------- |
5fa07b7a | 724 | ;;; Support stuff for help and usage messages. |
861345b4 | 725 | |
726 | (defun print-text (string | |
727 | &optional | |
728 | (stream *standard-output*) | |
729 | &key | |
730 | (start 0) | |
731 | (end nil)) | |
732 | "Prints STRING to a pretty-printed STREAM, breaking it at whitespace and | |
733 | newlines in the obvious way. Stuff between square brackets is not broken: | |
734 | this makes usage messages work better." | |
735 | (let ((i start) | |
736 | (nest 0) | |
737 | (splitp nil)) | |
738 | (flet ((emit () | |
739 | (write-string string stream :start start :end i) | |
740 | (setf start i))) | |
741 | (unless end | |
742 | (setf end (length string))) | |
743 | (loop | |
744 | (unless (< i end) | |
745 | (emit) | |
746 | (return)) | |
747 | (let ((ch (char string i))) | |
748 | (cond ((char= ch #\newline) | |
749 | (emit) | |
750 | (incf start) | |
751 | (pprint-newline :mandatory stream)) | |
752 | ((whitespace-char-p ch) | |
753 | (when (zerop nest) | |
754 | (setf splitp t))) | |
755 | (t | |
756 | (when splitp | |
757 | (emit) | |
758 | (pprint-newline :fill stream)) | |
759 | (setf splitp nil) | |
760 | (case ch | |
761 | (#\[ (incf nest)) | |
762 | (#\] (when (plusp nest) (decf nest)))))) | |
763 | (incf i)))))) | |
764 | ||
765 | (defun simple-usage (opts &optional mandatory-args) | |
766 | "Build a simple usage list from a list of options, and (optionally) | |
767 | mandatory argument names." | |
768 | (let (short-simple long-simple short-arg long-arg) | |
769 | (dolist (o opts) | |
770 | (cond ((not (and (opt-documentation o) | |
771 | (opt-long-name o)))) | |
772 | ((and (opt-short-name o) (opt-arg-name o)) | |
773 | (push o short-arg)) | |
774 | ((opt-short-name o) | |
775 | (push o short-simple)) | |
776 | ((opt-arg-name o) | |
777 | (push o long-arg)) | |
778 | (t | |
779 | (push o long-simple)))) | |
780 | (list | |
781 | (nconc (and short-simple | |
782 | (list (format nil "[-~{~C~}]" | |
783 | (sort (mapcar #'opt-short-name short-simple) | |
784 | #'char<)))) | |
785 | (and long-simple | |
786 | (mapcar (lambda (o) | |
787 | (format nil "[--~A]" (opt-long-name o))) | |
788 | (sort long-simple #'string< :key #'opt-long-name))) | |
789 | (and short-arg | |
790 | (mapcar (lambda (o) | |
791 | (format nil "~:[[-~C ~A]~;[-~C[~A]]~]" | |
792 | (opt-arg-optional-p o) | |
793 | (opt-short-name o) | |
794 | (opt-arg-name o))) | |
795 | (sort short-arg #'char-lessp | |
796 | :key #'opt-short-name))) | |
797 | (and long-arg | |
798 | (mapcar (lambda (o) | |
799 | (format nil "~:[[--~A ~A]~;[--~A[=~A]]~]" | |
800 | (opt-arg-optional-p o) | |
801 | (opt-long-name o) | |
802 | (opt-arg-name o))) | |
803 | (sort long-arg #'string-lessp | |
804 | :key #'opt-long-name))) | |
805 | (listify mandatory-args))))) | |
806 | ||
807 | (defun show-usage (prog usage &optional (stream *standard-output*)) | |
5fa07b7a | 808 | "Basic usage-showing function. PROG is the program name, probably from |
861345b4 | 809 | *command-line-strings*. USAGE is a list of possible usages of the program, |
810 | each of which is a list of items to be supplied by the user. In simple | |
811 | cases, a single string is sufficient." | |
812 | (pprint-logical-block (stream nil :prefix "Usage: ") | |
813 | (dolist (u (listify usage)) | |
814 | (pprint-logical-block (stream nil :prefix (format nil "~A " prog)) | |
815 | (format stream "~{~A ~:_~}" (listify u))) | |
816 | (pprint-newline :mandatory stream)))) | |
817 | ||
818 | (defun show-help (prog ver usage opts &optional (stream *standard-output*)) | |
819 | "Basic help-showing function. PROG is the program name, probably from | |
820 | *command-line-strings*. VER is the program's version number. USAGE is a | |
821 | list of the possible usages of the program, each of which may be a list of | |
822 | items to be supplied. OPTS is the list of supported options, as provided to | |
823 | the options parser. STREAM is the stream to write on." | |
824 | (format stream "~A, version ~A~2%" prog ver) | |
825 | (show-usage prog usage stream) | |
826 | (terpri stream) | |
827 | (let (newlinep) | |
828 | (dolist (o opts) | |
829 | (let ((doc (opt-documentation o))) | |
830 | (cond ((not o)) | |
831 | ((not (opt-long-name o)) | |
832 | (when newlinep | |
833 | (terpri stream) | |
834 | (setf newlinep nil)) | |
835 | (pprint-logical-block (stream nil) | |
836 | (print-text doc stream)) | |
837 | (terpri stream)) | |
838 | (t | |
839 | (setf newlinep t) | |
840 | (pprint-logical-block (stream nil :prefix " ") | |
841 | (pprint-indent :block 30 stream) | |
842 | (format stream "~:[ ~;-~:*~C,~] --~A" | |
843 | (opt-short-name o) | |
844 | (opt-long-name o)) | |
845 | (when (opt-arg-name o) | |
846 | (format stream "~:[=~A~;[=~A]~]" | |
847 | (opt-arg-optional-p o) | |
848 | (opt-arg-name o))) | |
849 | (write-string " " stream) | |
850 | (pprint-tab :line 30 1 stream) | |
851 | (print-text doc stream)) | |
852 | (terpri stream))))))) | |
853 | ||
854 | (defun sanity-check-option-list (opts) | |
855 | "Check the option list OPTS for basic sanity. Reused short and long option | |
856 | names are diagnosed. Maybe other problems will be reported later. Returns a | |
857 | list of warning strings." | |
858 | (let ((problems nil) | |
859 | (longs (make-hash-table :test #'equal)) | |
860 | (shorts (make-hash-table))) | |
861 | (flet ((problem (msg &rest args) | |
862 | (push (apply #'format nil msg args) problems))) | |
863 | (dolist (o opts) | |
864 | (push o (gethash (opt-long-name o) longs)) | |
865 | (push o (gethash (opt-short-name o) shorts))) | |
866 | (maphash (lambda (k v) | |
867 | (when (and k (cdr v)) | |
868 | (problem "Long name `--~A' reused in ~S" k v))) | |
869 | longs) | |
870 | (maphash (lambda (k v) | |
871 | (when (and k (cdr v)) | |
872 | (problem "Short name `-~C' reused in ~S" k v))) | |
873 | shorts) | |
874 | problems))) | |
875 | ||
5fa07b7a MW |
876 | ;;;-------------------------------------------------------------------------- |
877 | ;;; Full program descriptions. | |
878 | ||
879 | (defvar *help*) | |
880 | (defvar *version*) | |
881 | (defvar *usage*) | |
882 | ||
883 | (defun opt-help (arg) | |
884 | (declare (ignore arg)) | |
885 | (show-help *program-name* *version* *usage* *options*) | |
886 | (typecase *help* | |
887 | (string (terpri) (write-string *help*)) | |
888 | ((or function symbol) (terpri) (funcall *help*))) | |
889 | (format t "~&") | |
890 | (exit 0)) | |
891 | ||
892 | (defun opt-version (arg) | |
893 | (declare (ignore arg)) | |
894 | (format t "~A, version ~A~%" *program-name* *version*) | |
895 | (exit 0)) | |
896 | ||
897 | (defun do-usage (&optional (stream *standard-output*)) | |
898 | (show-usage *program-name* *usage* stream)) | |
899 | ||
900 | (defun die-usage () | |
901 | (do-usage *error-output*) | |
902 | (exit 1)) | |
903 | ||
904 | (defun opt-usage (arg) | |
905 | (declare (ignore arg)) | |
906 | (do-usage) | |
907 | (exit 0)) | |
908 | ||
909 | (defoptmacro help-opts (&key (short-help #\h) | |
910 | (short-version #\v) | |
911 | (short-usage #\u)) | |
912 | (mapcar #'parse-option-form | |
913 | `("Help options" | |
914 | (,@(and short-help (list short-help)) | |
915 | "help" | |
916 | #'opt-help | |
917 | "Show this help message.") | |
918 | (,@(and short-version (list short-version)) | |
919 | "version" | |
920 | #'opt-version | |
921 | ("Show ~A's version number." *program-name*)) | |
922 | (,@(and short-usage (list short-usage)) | |
923 | "usage" | |
924 | #'opt-usage | |
925 | ("Show a very brief usage summary for ~A." *program-name*))))) | |
926 | ||
927 | (defun define-program (&key | |
928 | program-name | |
929 | help | |
930 | version | |
931 | usage full-usage | |
932 | options) | |
933 | "Sets up all the required things a program needs to have to parse options | |
934 | and respond to them properly." | |
935 | (when program-name (setf *program-name* program-name)) | |
936 | (when help (setf *help* help)) | |
937 | (when version (setf *version* version)) | |
938 | (when options (setf *options* options)) | |
939 | (cond ((and usage full-usage) (error "conflicting options")) | |
940 | (usage (setf *usage* (simple-usage *options* usage))) | |
941 | (full-usage (setf *usage* full-usage)))) | |
942 | ||
943 | (defmacro do-options ((&key (parser '(make-option-parser))) &body clauses) | |
560e1186 MW |
944 | (with-gensyms (tparser) |
945 | `(let ((,tparser ,parser)) | |
946 | (loop | |
947 | (,(if (find t clauses :key #'car) 'case2 'ecase2) | |
948 | (option-parse-next ,tparser) | |
949 | ((nil) () (return)) | |
950 | ,@(remove-if #'null clauses :key #'car))) | |
951 | ,@(let ((tail (find nil clauses :key #'car))) | |
952 | (and tail | |
953 | (destructuring-bind ((&optional arg) &rest forms) (cdr tail) | |
954 | (if arg | |
955 | (list `(let ((,arg (option-parse-remainder ,tparser))) | |
956 | ,@forms)) | |
957 | forms))))))) | |
5fa07b7a | 958 | |
861345b4 | 959 | ;;;----- That's all, folks -------------------------------------------------- |