package.lisp 29.3 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
;;;; ---------------------------------------------------------------------------
;;;; Handle ASDF package upgrade, including implementation-dependent magic.
;;
;; See https://bugs.launchpad.net/asdf/+bug/485687
;;
;; CAUTION: we must handle the first few packages specially for hot-upgrade.
;; asdf/package will be frozen as of 2.27
;; to forever export the same exact symbols.
;; Any other symbol must be import-from'ed
;; and reexported in a different package
;; (alternatively the package may be dropped & replaced by one with a new name).

(defpackage :asdf/package
  (:use :common-lisp)
  (:export
16
   #:find-package* #:find-symbol* #:symbol-call #:intern* #:unintern* #:make-symbol*
17 18
   #:symbol-shadowing-p #:rehome-symbol
   #:delete-package* #:package-names #:packages-from-names
19
   #:reify-symbol #:unreify-symbol
20
   #:package-definition-form #:ensure-package #:define-package))
21 22 23 24 25 26

(in-package :asdf/package)

;;;; General purpose package utilities

(eval-when (:load-toplevel :compile-toplevel :execute)
27 28 29 30 31 32 33
  (defun find-package* (package-designator &optional (error t))
    (let ((package (find-package package-designator)))
      (cond
        (package package)
        (error (error "No package named ~S" (string package-designator)))
        (t nil))))
  (defun find-symbol* (name package-designator &optional (error t))
34 35 36 37 38 39
    "Find a symbol in a package of given string'ified NAME;
unless CL:FIND-SYMBOL, work well with 'modern' case sensitive syntax
by letting you supply a symbol or keyword for the name;
also works well when the package is not present.
If optional ERROR argument is NIL, return NIL instead of an error
when the symbol is not found."
40 41
    (block nil
      (let ((package (find-package* package-designator error)))
42
        (when package ;; package error handled by find-package* already
43 44 45 46 47
          (multiple-value-bind (symbol status) (find-symbol (string name) package)
            (cond
              (status (return (values symbol status)))
              (error (error "There is no symbol ~S in package ~S" name (package-name package))))))
        (values nil nil))))
48 49 50 51 52
  (defun symbol-call (package name &rest args)
    "Call a function associated with symbol of given name in given package,
with given ARGS. Useful when the call is read before the package is loaded,
or when loading the package is optional."
    (apply (find-symbol* name package) args))
53
  (defun intern* (name package-designator &optional (error t))
54
    (intern (string name) (find-package* package-designator error)))
55 56 57 58
  (defun make-symbol* (name)
    (etypecase name
      (string (make-symbol name))
      (symbol (copy-symbol name))))
59 60 61 62 63 64 65 66 67 68 69
  (defun unintern* (name package-designator &optional (error t))
    (block nil
      (let ((package (find-package* package-designator error)))
        (when package
          (multiple-value-bind (symbol status) (find-symbol* name package error)
            (cond
              (status (unintern symbol package)
                      (return (values symbol status)))
              (error (error "symbol ~A not present in package ~A"
                            (string symbol) (package-name package))))))
        (values nil nil))))
70
  (defun symbol-shadowing-p (symbol package)
Francois-Rene Rideau's avatar
Francois-Rene Rideau committed
71
    (and (member symbol (package-shadowing-symbols package)) t))
72 73 74 75
  (defun home-package-p (symbol package)
    (eq (symbol-package symbol) (find-package* package))))

(eval-when (:load-toplevel :compile-toplevel :execute)
Francois-Rene Rideau's avatar
Francois-Rene Rideau committed
76 77 78
  (defun symbol-package-name (symbol)
    (let ((package (symbol-package symbol)))
      (and package (package-name package))))
79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104
  (defun standard-common-lisp-symbol-p (symbol)
    (multiple-value-bind (sym status) (find-symbol* symbol :common-lisp nil)
      (and (eq sym symbol) (eq status :external))))
  (defun reify-package (package &optional package-context)
    (if (eq package package-context) t
        (etypecase package
          (null nil)
          ((eql (find-package :cl)) :cl)
          (package (package-name package)))))
  (defun unreify-package (package &optional package-context)
    (etypecase package
      (null nil)
      ((eql t) package-context)
      ((or symbol string) (find-package package))))
  (defun reify-symbol (symbol &optional package-context)
    (etypecase symbol
      ((or keyword (satisfies standard-common-lisp-symbol-p)) symbol)
      (symbol (vector (symbol-name symbol)
                      (reify-package (symbol-package symbol) package-context)))))
  (defun unreify-symbol (symbol &optional package-context)
    (etypecase symbol
      (symbol symbol)
      ((simple-vector 2)
       (let* ((symbol-name (svref symbol 0))
              (package-foo (svref symbol 1))
              (package (unreify-package package-foo package-context)))
105 106
         (if package (intern* symbol-name package)
             (make-symbol* symbol-name)))))))
Francois-Rene Rideau's avatar
Francois-Rene Rideau committed
107 108

(eval-when (:load-toplevel :compile-toplevel :execute)
109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137
  #+(or clisp clozure)
  (defun get-setf-function-symbol (symbol)
    #+clisp (let ((sym (get symbol 'system::setf-function)))
              (if sym (values sym :setf-function)
                  (let ((sym (get symbol 'system::setf-expander)))
                    (if sym (values sym :setf-expander)
                        (values nil nil)))))
    #+clozure (gethash symbol ccl::%setf-function-names%))
  #+(or clisp clozure)
  (defun set-setf-function-symbol (new-setf-symbol symbol &optional kind)
    #+clisp (assert (member kind '(:setf-function :setf-expander)))
    #+clozure (assert (eq kind t))
    #+clisp
    (cond
      ((null new-setf-symbol)
       (remprop symbol 'system::setf-function)
       (remprop symbol 'system::setf-expander))
      ((eq kind :setf-function)
       (setf (get symbol 'system::setf-function) new-setf-symbol))
      ((eq kind :setf-expander)
       (setf (get symbol 'system::setf-expander) new-setf-symbol)))
    #+clozure
    (progn
      (gethash symbol ccl::%setf-function-names%) new-setf-symbol
      (gethash new-setf-symbol ccl::%setf-function-name-inverses%) symbol))
  #+(or clisp clozure)
  (defun create-setf-function-symbol (symbol)
    #+clisp (system::setf-symbol symbol)
    #+clozure (ccl::construct-setf-function-name symbol))
Francois-Rene Rideau's avatar
Francois-Rene Rideau committed
138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164
  (defun set-dummy-symbol (symbol reason other-symbol)
    (setf (get symbol 'dummy-symbol) (cons reason other-symbol)))
  (defun make-dummy-symbol (symbol)
    (let ((dummy (copy-symbol symbol)))
      (set-dummy-symbol dummy 'replacing symbol)
      (set-dummy-symbol symbol 'replaced-by dummy)
      dummy))
  (defun dummy-symbol (symbol)
    (get symbol 'dummy-symbol))
  (defun get-dummy-symbol (symbol)
    (let ((existing (dummy-symbol symbol)))
      (if existing (values (cdr existing) (car existing))
          (make-dummy-symbol symbol))))
  (defun nuke-symbol-in-package (symbol package-designator)
    (let ((package (find-package* package-designator))
          (name (symbol-name symbol)))
      (multiple-value-bind (sym stat) (find-symbol name package)
        (when (and (member stat '(:internal :external)) (eq symbol sym))
          (if (symbol-shadowing-p symbol package)
              (shadowing-import (get-dummy-symbol symbol) package)
              (unintern symbol package))))))
  (defun nuke-symbol (symbol &optional (packages (list-all-packages)))
    #+(or clisp clozure)
    (multiple-value-bind (setf-symbol kind)
        (get-setf-function-symbol symbol)
      (when kind (nuke-symbol setf-symbol)))
    (loop :for p :in packages :do (nuke-symbol-in-package symbol p)))
165 166 167 168 169 170 171 172 173 174 175 176 177 178 179
  (defun rehome-symbol (symbol package-designator)
    "Changes the home package of a symbol, also leaving it present in its old home if any"
    (let* ((name (symbol-name symbol))
           (package (find-package* package-designator))
           (old-package (symbol-package symbol))
           (old-status (and old-package (nth-value 1 (find-symbol name old-package))))
           (shadowing (and old-package (symbol-shadowing-p symbol old-package) (make-symbol name))))
      (multiple-value-bind (overwritten-symbol overwritten-symbol-status) (find-symbol name package)
        (unless (eq package old-package)
          (let ((overwritten-symbol-shadowing-p
                  (and overwritten-symbol-status
                       (symbol-shadowing-p overwritten-symbol package))))
            (when old-package
              (if shadowing
                  (shadowing-import shadowing old-package))
Francois-Rene Rideau's avatar
Francois-Rene Rideau committed
180
              (unintern symbol old-package))
181 182 183 184 185 186 187 188 189 190
            (cond
              (overwritten-symbol-shadowing-p
               (shadowing-import symbol package))
              (t
               (when overwritten-symbol-status
                 (unintern overwritten-symbol package))
               (import symbol package)))
            (if shadowing
                (shadowing-import symbol old-package)
                (import symbol old-package))
191 192 193 194 195 196 197 198 199
            #+(or clisp clozure)
            (multiple-value-bind (setf-symbol kind)
                (get-setf-function-symbol symbol)
              (when kind
                (let* ((setf-function (fdefinition setf-symbol))
                       (new-setf-symbol (create-setf-function-symbol symbol)))
                  (setf (fdefinition new-setf-symbol) setf-function)
                  (set-setf-function-symbol symbol new-setf-symbol kind))))
            #+(or clisp clozure)
200
            (multiple-value-bind (overwritten-setf foundp)
201
                (get-setf-function-symbol overwritten-symbol)
202 203 204 205 206 207 208
              (when foundp
                (unintern overwritten-setf)))
            (when (eq old-status :external)
              (export symbol old-package))
            (when (eq overwritten-symbol-status :external)
              (export symbol package))))
        (values overwritten-symbol overwritten-symbol-status))))
209 210 211
  (defun ensure-package-unused (package)
    (loop :for p :in (package-used-by-list package) :do
      (unuse-package package p)))
Francois-Rene Rideau's avatar
Francois-Rene Rideau committed
212
  (defun delete-package* (package &optional nuke)
213 214
    (let ((p (find-package package)))
      (when p
Francois-Rene Rideau's avatar
Francois-Rene Rideau committed
215
        (when nuke (do-symbols (s p) (when (eq p (symbol-package s)) (nuke-symbol s))))
216 217
        (ensure-package-unused p)
        (delete-package package))))
Francois-Rene Rideau's avatar
Francois-Rene Rideau committed
218 219 220 221 222 223 224 225
  (defun fresh-package-name (&optional (prefix :%TO-BE-DELETED)
                               (index (random most-positive-fixnum)))
    (loop :for i :from index
          :for n = (format nil "~A-~D" prefix i)
          :thereis (and (not (find-package n)) n)))
  (defun rename-package-away (p)
    (rename-package
     p (fresh-package-name (format nil "__~A__" (package-name p)) 0)))
226 227
  (defun package-names (package)
    (cons (package-name package) (package-nicknames package)))
228 229 230 231 232 233 234
  (defun packages-from-names (names)
    (remove-duplicates (remove nil (mapcar #'find-package names)) :from-end t)))


;;; Communicable representation of symbol and package information

(eval-when (:load-toplevel :compile-toplevel :execute)
235
  (defun package-definition-form (package-designator &key internp (nicknamesp t) (error t))
236 237 238 239 240 241 242 243 244
    (let* ((package (find-package* package-designator error))
           (name (package-name package))
           (nicknames (package-nicknames package))
           (use (mapcar #'package-name (package-use-list package)))
           (shadow ())
           (shadowing-import (make-hash-table :test 'equal))
           (import (make-hash-table :test 'equal))
           (export ())
           (intern ()))
245
      (when package
246 247 248 249 250 251 252 253 254 255 256 257
        (loop :for sym :being :the :symbols :in package
              :for status = (nth-value 1 (find-symbol* sym package)) :do
                (ecase status
                  ((nil :inherited))
                  ((:internal :external)
                   (let* ((name (symbol-name sym))
                          (external (eq status :external))
                          (home (symbol-package sym))
                          (home-name (package-name home))
                          (imported (not (eq home package)))
                          (shadowing (symbol-shadowing-p sym package)))
                     (cond
258
                       ((and shadowing imported)
259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278
                        (push name (gethash home-name shadowing-import)))
                       (shadowing
                        (push name shadow))
                       (imported
                        (push name (gethash home-name import))))
                     (cond
                       (external
                        (push name export))
                       (imported)
                       (t (push name intern)))))))
        (labels ((sort-names (names)
                   (sort names #'string<))
                 (table-keys (table)
                   (loop :for k :being :the :hash-keys :of table :collect k))
                 (when-relevant (key value)
                   (when value (list (cons key value))))
                 (import-options (key table)
                   (loop :for i :in (sort-names (table-keys table))
                         :collect `(,key ,i ,@(sort-names (gethash i table))))))
          `(defpackage ,name
279
             ,@(when-relevant :nicknames (and nicknamesp (sort-names nicknames)))
280 281 282 283 284 285
             (:use ,@(sort-names use))
             ,@(when-relevant :shadow (sort-names shadow))
             ,@(import-options :shadowing-import-from shadowing-import)
             ,@(import-options :import-from import)
             ,@(when-relevant :export (sort-names export))
             ,@(when-relevant :intern (and internp (sort-names intern)))))))))
286

287 288 289

;;; ensure-package, define-package

290
(eval-when (:load-toplevel :compile-toplevel :execute)
291 292
  (defvar *all-package-happiness* '())
  (defvar *all-package-fishiness* (list t))
293
  (defvar *package-fishiness* '())
294
  (defun flush-fishy ()
295
    (when *package-fishiness*
296 297 298
      (if (null (rest *package-fishiness*))
          (push (first *package-fishiness*) *all-package-happiness*)
          (push (nreverse *package-fishiness*) *all-package-fishiness*))
299
      (setf *package-fishiness* nil)))
300
  (defun record-fishy (info)
301
    (push info *package-fishiness*))
302
  (macrolet ((when-fishy (&body body)
303
               `(when *all-package-fishiness* ,@body))
304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332
             (fishy (&rest info)
               `(when-fishy (record-fishy (list ,@info)))))
    (defun ensure-package (name &key
                                  nicknames documentation use
                                  shadow shadowing-import-from
                                  import-from export intern
                                  recycle mix reexport
                                  unintern)
      (let* ((name (string name))
             (nicknames (mapcar #'string nicknames))
             (names (cons name nicknames))
             (previous (packages-from-names names))
             (discarded (cdr previous))
             (to-delete ())
             (package (or (first previous) (make-package name :nicknames nicknames)))
             (recycle (packages-from-names recycle))
             (use (mapcar 'find-package* use))
             (mix (mapcar 'find-package* mix))
             (reexport (mapcar 'find-package* reexport))
             (shadow (mapcar 'string shadow))
             (export (mapcar 'string export))
             (intern (mapcar 'string intern))
             (unintern (mapcar 'string unintern))
             (shadowed (make-hash-table :test 'equal)) ; string to bool
             (imported (make-hash-table :test 'equal)) ; string to bool
             (exported (make-hash-table :test 'equal)) ; string to bool
             ;; string to list home package and use package:
             (inherited (make-hash-table :test 'equal)))
        (when-fishy (record-fishy name))
Francois-Rene Rideau's avatar
Francois-Rene Rideau committed
333
        (labels
334 335
            ((ensure-shadowing-import (name p)
               (let ((import (find-symbol* name p)))
Francois-Rene Rideau's avatar
Francois-Rene Rideau committed
336 337 338 339 340 341 342 343 344 345
                 (multiple-value-bind (existing status) (find-symbol name package)
                   (cond
                     ((gethash name shadowed)
                      (unless (eq import existing)
                        (error "Conflicting shadowings for ~A" name)))
                     (t
                      (setf (gethash name shadowed) t)
                      (setf (gethash name imported) t)
                      (unless (or (null status)
                                  (and (member status '(:internal :external))
346
                                       (eq existing import)
Francois-Rene Rideau's avatar
Francois-Rene Rideau committed
347 348
                                       (symbol-shadowing-p existing package)))
                        (fishy :shadowing-import
349
                               name (package-name p) (symbol-package-name import)
Francois-Rene Rideau's avatar
Francois-Rene Rideau committed
350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370
                               (and status (symbol-package-name existing)) status))
                      (shadowing-import import package))))))
             (ensure-import (sym p)
               (let* ((name (string sym))
                      (import (find-symbol* name p)))
                 (multiple-value-bind (existing status) (find-symbol name package)
                   (cond
                     ((gethash name imported)
                      (unless (eq import existing)
                        (error "Can't import ~S from both ~S and ~S"
                               name (package-name (symbol-package existing)) (package-name p))))
                     ((gethash name shadowed)
                      (error "Can't both shadow ~S and import it from ~S" name (package-name p)))
                     (t
                      (setf (gethash name imported) t)
                      (unless (and status (eq import existing))
                        (when status
                          (unintern* existing package)
                          (fishy :import name (package-name p) (symbol-package-name import)
                                 (and status (symbol-package-name existing)) status))
                        (import import package)))))))
371 372 373 374 375 376
             (ensure-mix (name symbol p)
               (unless (gethash name shadowed)
                 (multiple-value-bind (existing status) (find-symbol name package)
                   (let* ((sp (symbol-package symbol))
                          (im (gethash name imported))
                          (in (gethash name inherited)))
Francois-Rene Rideau's avatar
Francois-Rene Rideau committed
377
                     (cond
378 379 380 381 382
                       ((or (null status)
                            (and status (eq symbol existing))
                            (and in (eq sp (first in))))
                        (ensure-inherited name symbol p t))
                       (in
Francois-Rene Rideau's avatar
Francois-Rene Rideau committed
383
                        (remhash name inherited)
384 385 386 387
                        (ensure-shadowing-import name (second in)))
                       (im
                         (error "Imported symbol ~S conflicts with inherited symbol ~S in ~S"
                                existing symbol (package-name package)))
Francois-Rene Rideau's avatar
Francois-Rene Rideau committed
388
                       (t
389 390
                        (ensure-inherited name symbol p t)))))))
             (ensure-inherited (name symbol p mix)
Francois-Rene Rideau's avatar
Francois-Rene Rideau committed
391 392
               (multiple-value-bind (existing status) (find-symbol name package)
                 (let* ((sp (symbol-package symbol))
393
                        (in (gethash name inherited))
Francois-Rene Rideau's avatar
Francois-Rene Rideau committed
394
                        (xp (and status (symbol-package existing))))
395
                   (cond
Francois-Rene Rideau's avatar
Francois-Rene Rideau committed
396
                     ((gethash name shadowed))
397 398 399 400 401 402
                     (in
                      (unless (equal sp (first in))
                        (if mix
                            (ensure-shadowing-import name (second in))
                            (error "Can't inherit ~S from ~S, it is inherited from ~S"
                                   name (package-name sp) (package-name (first in))))))
Francois-Rene Rideau's avatar
Francois-Rene Rideau committed
403 404 405 406
                     ((gethash name imported)
                      (unless (eq symbol existing)
                        (error "Can't inherit ~S from ~S, it is imported from ~S"
                               name (package-name sp) (package-name xp))))
407
                     (t
Francois-Rene Rideau's avatar
Francois-Rene Rideau committed
408
                      (setf (gethash name inherited) (list sp p))
409
                      (when (and status (not (eq sp xp)))
410 411 412 413 414
                        (let ((shadowing (symbol-shadowing-p existing package)))
                          (fishy :inherited name (package-name p) (package-name sp)
                                 (package-name xp))
                          (if shadowing (ensure-shadowing-import name p)
                              (unintern* existing package)))))))))
Francois-Rene Rideau's avatar
Francois-Rene Rideau committed
415 416 417 418 419 420 421
             (recycle-symbol (name)
               (let (recycled foundp)
                 (dolist (r recycle (values recycled foundp))
                   (multiple-value-bind (symbol status) (find-symbol name r)
                     (when (and status (home-package-p symbol r))
                       (cond
                         (foundp
422 423
                          ;; (nuke-symbol symbol)) -- even simple variable names like O or C will do that.
                          (fishy :recycled-duplicate name (package-name foundp) (package-name r)))
Francois-Rene Rideau's avatar
Francois-Rene Rideau committed
424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442
                         (t
                          (setf recycled symbol foundp r))))))))
             (symbol-recycled-p (sym)
               (member (symbol-package sym) recycle))
             (ensure-symbol (name &optional intern)
               (unless (or (gethash name shadowed)
                           (gethash name imported)
                           (gethash name inherited))
                 (multiple-value-bind (existing status)
                     (find-symbol name package)
                   (multiple-value-bind (recycled previous) (recycle-symbol name)
                     (cond
                       ((and status (eq existing recycled) (eq previous package)))
                       (previous
                        (rehome-symbol recycled package))
                       ((and status (eq package (symbol-package existing))))
                       (t
                        (when status
                          (unintern existing)
443 444 445
                          (fishy :ensure-symbol name
                                 (reify-package (symbol-package existing) package)
                                 status intern))
Francois-Rene Rideau's avatar
Francois-Rene Rideau committed
446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479
                        (when intern
                          (intern* name package))))))))
             (ensure-export (name p)
               (multiple-value-bind (symbol status) (find-symbol* name p)
                 (unless (eq status :external)
                   (ensure-exported name symbol p))))
             (ensure-exported (name sym p)
               (dolist (u (package-used-by-list p))
                 (ensure-exported-to-user name sym u))
               (export sym p))
             (ensure-exported-to-user (name sym u)
               (multiple-value-bind (usym ustat) (find-symbol name u)
                 (unless (and ustat (eq sym usym))
                   (let ((accessible
                           (when ustat
                             (let ((shadowing (symbol-shadowing-p usym u))
                                   (recycled (symbol-recycled-p usym)))
                               (unless (and shadowing (not recycled))
                                 (if (or (eq ustat :inherited) shadowing)
                                     (shadowing-import sym u)
                                     (unintern usym u))
                                 (fishy :ensure-export name (symbol-package-name sym)
                                        (package-name u)
                                        (and ustat (symbol-package-name usym)) ustat shadowing)
                                 t)))))
                     (when (and accessible (eq ustat :external))
                       (ensure-exported name sym u)))))))
          #-gcl (setf (documentation package t) documentation) #+gcl documentation
          (loop :for p :in (set-difference (package-use-list package) (append mix use))
                :do (unuse-package p package) (fishy :use (package-names p)))
          (loop :for p :in discarded
                :for n = (remove-if #'(lambda (x) (member x names :test 'equal))
                                    (package-names p))
                :do (fishy :nickname (package-names p))
480 481 482
                    (cond (n (rename-package p (first n) (rest n)))
                          (t (rename-package-away p)
                             (push p to-delete))))
Francois-Rene Rideau's avatar
Francois-Rene Rideau committed
483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518
          (rename-package package name nicknames)
          (dolist (name unintern)
            (multiple-value-bind (existing status) (find-symbol name package)
              (when status
                (unless (eq status :inherited)
                  (unintern* name package nil))
                (fishy :unintern name (symbol-package-name existing) status))))
          (dolist (name export)
            (setf (gethash name exported) t))
          (dolist (p reexport)
            (do-external-symbols (sym p)
              (setf (gethash (string sym) exported) t)))
          (do-external-symbols (sym package)
            (let ((name (symbol-name sym)))
              (unless (gethash name exported)
                (fishy :over-exported name (symbol-package-name sym))
                (unexport sym package))))
          (dolist (name shadow)
            (setf (gethash name shadowed) t)
            (multiple-value-bind (existing status) (find-symbol name package)
              (multiple-value-bind (recycled previous) (recycle-symbol name)
                (let ((shadowing (and status (symbol-shadowing-p existing package))))
                  (cond
                    ((eq previous package))
                    (previous
                     (fishy :shadow-recycled name (package-name previous)
                            (and status (symbol-package-name existing)) status shadowing)
                     (rehome-symbol recycled package))
                    ((or (member status '(nil :inherited))
                         (home-package-p existing package)))
                    (t
                     (let ((dummy (make-symbol name)))
                       (fishy :shadow-imported name (symbol-package-name existing) status shadowing)
                       (shadowing-import dummy package)
                       (import dummy package)))))))
            (shadow name package))
519 520 521
          (loop :for (p . syms) :in shadowing-import-from
                :for pp = (find-package* p) :do
                  (dolist (sym syms) (ensure-shadowing-import (string sym) pp)))
Francois-Rene Rideau's avatar
Francois-Rene Rideau committed
522
          (dolist (p mix)
523
            (do-external-symbols (sym p) (ensure-mix (symbol-name sym) sym p)))
Francois-Rene Rideau's avatar
Francois-Rene Rideau committed
524 525 526
          (loop :for (p . syms) :in import-from :do
            (dolist (sym syms) (ensure-import sym p)))
          (dolist (p (append use mix))
527
            (do-external-symbols (sym p) (ensure-inherited (string sym) sym p nil))
Francois-Rene Rideau's avatar
Francois-Rene Rideau committed
528 529 530 531 532 533 534 535 536
            (use-package p package))
          (loop :for name :being :the :hash-keys :of exported :do
            (ensure-symbol (string name) t)
            (ensure-export name package))
          (dolist (name intern)
            (ensure-symbol (string name) t))
          (do-symbols (sym package)
            (ensure-symbol (symbol-name sym)))
          (map () 'delete-package* to-delete)
537
          (flush-fishy)
Francois-Rene Rideau's avatar
Francois-Rene Rideau committed
538
          package)))))
539 540

(eval-when (:load-toplevel :compile-toplevel :execute)
541
  (defun parse-define-package-form (package clauses)
542 543
    (loop
      :with use-p = nil :with recycle-p = nil
544
      :with documentation = nil
545
      :for (kw . args) :in clauses
546
      :when (eq kw :nicknames) :append args :into nicknames :else
Francois-Rene Rideau's avatar
Francois-Rene Rideau committed
547 548 549 550 551
        :when (eq kw :documentation)
          :do (cond
                (documentation (error "define-package: can't define documentation twice"))
                ((or (atom args) (cdr args)) (error "define-package: bad documentation"))
                (t (setf documentation (car args)))) :else
552
      :when (eq kw :use) :append args :into use :and :do (setf use-p t) :else
Francois-Rene Rideau's avatar
Francois-Rene Rideau committed
553 554 555 556 557 558 559 560 561 562
        :when (eq kw :shadow) :append args :into shadow :else
          :when (eq kw :shadowing-import-from) :collect args :into shadowing-import-from :else
            :when (eq kw :import-from) :collect args :into import-from :else
              :when (eq kw :export) :append args :into export :else
                :when (eq kw :intern) :append args :into intern :else
                  :when (eq kw :recycle) :append args :into recycle :and :do (setf recycle-p t) :else
                    :when (eq kw :mix) :append args :into mix :else
                      :when (eq kw :reexport) :append args :into reexport :else
                        :when (eq kw :unintern) :append args :into unintern :else
                          :do (error "unrecognized define-package keyword ~S" kw)
563 564
      :finally (return `(,package
                         :nicknames ,nicknames :documentation ,documentation
565 566 567 568
                         :use ,(if use-p use '(:common-lisp))
                         :shadow ,shadow :shadowing-import-from ,shadowing-import-from
                         :import-from ,import-from :export ,export :intern ,intern
                         :recycle ,(if recycle-p recycle (cons package nicknames))
569
                         :mix ,mix :reexport ,reexport :unintern ,unintern)))))
570 571 572

(defmacro define-package (package &rest clauses)
  `(eval-when (:compile-toplevel :load-toplevel :execute)
573
     #+(or ecl gcl) (defpackage ,package (:use))
574 575
     #+clisp (macrolet ((foo ()
                          (apply 'ensure-package ',(parse-define-package-form package clauses))
576
                          (package-definition-form ',package :nicknamesp nil)))
577
               (foo))
578
     (apply 'ensure-package ',(parse-define-package-form package clauses))))
579

580 581 582 583 584 585 586

;;; Final tricks to keep various implementations happier
(eval-when (:load-toplevel :compile-toplevel :execute)
  #+allegro
  (setf excl::*autoload-package-name-alist*
        (remove "asdf" excl::*autoload-package-name-alist*
                :test 'equalp :key 'car)) ; We need that BEFORE any mention of package ASDF.
Francois-Rene Rideau's avatar
Francois-Rene Rideau committed
587
  (unless (member :asdf2.27 *features*)
588
    #+(or clisp xcl)
589 590 591 592
    (progn
      (when (find-package :asdf)
        (delete-package* :asdf t))
      (make-package :asdf :use ()))))