lisp/dgnushack.el

   1 ;;; dgnushack.el --- a hack to set the load path for byte-compiling
   2 ;; Copyright (C) 1994-2013 Free Software Foundation, Inc.
   3
   4 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
   5 ;; Version: 4.19
   6 ;; Keywords: news, path
   7
   8 ;; This file is part of GNU Emacs.
   9
  10 ;; GNU Emacs is free software; you can redistribute it and/or modify
  11 ;; it under the terms of the GNU General Public License as published by
  12 ;; the Free Software Foundation; either version 3, or (at your option)
  13 ;; any later version.
  14
  15 ;; GNU Emacs is distributed in the hope that it will be useful,
  16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;; GNU General Public License for more details.
  19
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  22
  23 ;;; Commentary:
  24
  25 ;;; Code:
  26
  27 (defvar dgnushack-default-load-path (copy-sequence load-path))
  28
  29 (defalias 'facep 'ignore)
  30
  31 (require 'cl)
  32 (require 'iswitchb)
  33
  34 (condition-case nil
  35     (require 'org-entities)
  36   (error nil))
  37
  38 (defvar srcdir (or (getenv "srcdir") "."))
  39 (defvar loaddir (and load-file-name (file-name-directory load-file-name)))
  40
  41 (defun my-getenv (str)
  42   (let ((val (getenv str)))
  43     (if (equal val "no") nil val)))
  44
  45 (if (my-getenv "lispdir")
  46     (push (my-getenv "lispdir") load-path))
  47
  48 (push (or (my-getenv "URLDIR") (expand-file-name "../../url/lisp/" loaddir))
  49       load-path)
  50
  51 (push (or (my-getenv "W3DIR") (expand-file-name "../../w3/lisp/" loaddir))
  52       load-path)
  53
  54 ;(push "/usr/share/emacs/site-lisp" load-path)
  55
  56 ;; If we are building w3 in a different directory than the source
  57 ;; directory, we must read *.el from source directory and write *.elc
  58 ;; into the building directory.  For that, we define this function
  59 ;; before loading bytecomp.  Bytecomp doesn't overwrite this function.
  60 (defun byte-compile-dest-file (filename)
  61   "Convert an Emacs Lisp source file name to a compiled file name.
  62  In addition, remove directory name part from FILENAME."
  63   (setq filename (byte-compiler-base-file-name filename))
  64   (setq filename (file-name-sans-versions filename))
  65   (setq filename (file-name-nondirectory filename))
  66   (if (eq system-type 'windows-nt)
  67       (setq filename (downcase filename)))
  68   (cond ((eq system-type 'vax-vms)
  69          (concat (substring filename 0 (string-match ";" filename)) "c"))
  70         ((string-match emacs-lisp-file-regexp filename)
  71          (concat (substring filename 0 (match-beginning 0)) ".elc"))
  72         (t (concat filename ".elc"))))
  73
  74 (require 'bytecomp)
  75 ;; To avoid having defsubsts and inlines happen.
  76 ;(if (featurep 'xemacs)
  77 ;    (require 'byte-optimize)
  78 ;  (require 'byte-opt))
  79 ;(defun byte-optimize-inline-handler (form)
  80 ;  "byte-optimize-handler for the `inline' special-form."
  81 ;  (cons 'progn (cdr form)))
  82 ;(defalias 'byte-compile-file-form-defsubst 'byte-compile-file-form-defun)
  83
  84 ;; Work around for an incompatibility (XEmacs 21.4 vs. 21.5), see the
  85 ;; following threads:
  86 ;;
  87 ;; http://thread.gmane.org/gmane.emacs.gnus.general/56414
  88 ;; Subject: attachment problems found but not fixed
  89 ;;
  90 ;; http://thread.gmane.org/gmane.emacs.gnus.general/56459
  91 ;; Subject: Splitting mail -- XEmacs 21.4 vs 21.5
  92 ;;
  93 ;; http://thread.gmane.org/gmane.emacs.xemacs.beta/20519
  94 ;; Subject: XEmacs 21.5 and Gnus fancy splitting.
  95 ;;
  96 ;; Should be fixed in XEmacs (March 2007).
  97 ;; http://thread.gmane.org/gmane.emacs.xemacs.patches/8124
  98 ;; When should we remove this workaround?
  99 ;;
 100 (when (and (featurep 'xemacs)
 101            (let ((table (copy-syntax-table emacs-lisp-mode-syntax-table)))
 102              (modify-syntax-entry ?= " " table)
 103              (with-temp-buffer
 104                (with-syntax-table table
 105                  (insert "foo=bar")
 106                  (goto-char (point-min))
 107                  (forward-sexp 1)
 108                  (eolp)))))
 109   ;; The original `with-syntax-table' uses `copy-syntax-table' which
 110   ;; doesn't seem to copy modified syntax entries in old XEmacs 21.5.
 111   (defmacro with-syntax-table (syntab &rest body)
 112     "Evaluate BODY with the SYNTAB as the current syntax table."
 113     `(let ((stab (syntax-table)))
 114        (unwind-protect
 115            (progn
 116              ;;(set-syntax-table (copy-syntax-table ,syntab))
 117              (set-syntax-table ,syntab)
 118              ,@body)
 119          (set-syntax-table stab)))))
 120
 121 (push srcdir load-path)
 122 (push loaddir load-path)
 123 (load (expand-file-name "lpath.el" loaddir) nil t)
 124
 125 (defalias 'device-sound-enabled-p 'ignore)
 126 (defalias 'play-sound-file 'ignore)
 127 (defalias 'efs-re-read-dir 'ignore)
 128 (defalias 'ange-ftp-re-read-dir 'ignore)
 129 (defalias 'define-mail-user-agent 'ignore)
 130 (defalias 'debbugs-gnu-summary-mode 'ignore)
 131 (defvar debbugs-gnu-bug-number nil)
 132
 133 (eval-and-compile
 134   (unless (featurep 'xemacs)
 135     (defalias 'get-popup-menu-response 'ignore)
 136     (defalias 'event-object 'ignore)
 137     (autoload 'iswitchb-read-buffer "iswitchb")
 138     (autoload 'netrc-credentials "netrc")
 139     (defalias 'x-defined-colors 'ignore)
 140     (defalias 'read-color 'ignore)))
 141
 142 (eval-and-compile
 143   (when (featurep 'xemacs)
 144     (defvar window-point-insertion-type nil)
 145     (unless (fboundp 'defadvice)
 146       (autoload 'defadvice "advice" nil nil 'macro))
 147     (unless (boundp 'help-echo-owns-message)
 148       (defvar help-echo-owns-message))
 149     (unless (boundp 'gnus-registry-enabled)
 150       (defvar gnus-registry-enabled nil))
 151     (unless (boundp 'mail-dont-reply-to-names)
 152       (defvar mail-dont-reply-to-names nil))
 153     (unless (fboundp 'url-retrieve-synchronously)
 154       (defalias 'url-retrieve-synchronously 'url-retrieve))
 155     (unless (fboundp 'url-queue-retrieve)
 156       (defun url-queue-retrieve (url callback &optional cbargs silent
 157                                      inhibit-cookies)
 158         (url-retrieve url callback cbargs)))
 159     (autoload 'Info-directory "info" nil t)
 160     (autoload 'Info-index "info" nil t)
 161     (autoload 'Info-index-next "info" nil t)
 162     (autoload 'Info-menu "info" nil t)
 163     (autoload 'ad-add-advice "advice")
 164     (unless (and (emacs-version>= 21 5)
 165                  (not (featurep 'sxemacs)))
 166       ;; calendar/auto-autoloads.el provides it.
 167       (autoload 'add-to-invisibility-spec "dummy"))
 168     (autoload 'annotations-at "annotations")
 169     (autoload 'apropos "apropos" nil t)
 170     (autoload 'apropos-command "apropos" nil t)
 171     (autoload 'bbdb-complete-name "bbdb-com" nil t)
 172     (autoload 'browse-url "browse-url" nil t)
 173     (autoload 'browse-url-of-file "browse-url" nil t)
 174     (autoload 'c-mode "cc-mode" nil t)
 175     (autoload 'customize-apropos "cus-edit" nil t)
 176     (autoload 'customize-group "cus-edit" nil t)
 177     (autoload 'customize-save-variable "cus-edit" nil t)
 178     (autoload 'customize-set-variable "cus-edit" nil t)
 179     (autoload 'customize-variable "cus-edit" nil t)
 180     (autoload 'debug "debug" nil t)
 181     (autoload 'sha1 "sha1")
 182     (if (featurep 'mule)
 183         (unless (locate-library "mule-ccl")
 184           (autoload 'define-ccl-program "ccl" nil nil 'macro))
 185       (defalias 'define-ccl-program 'ignore))
 186     (autoload 'delete-annotation "annotations")
 187     (autoload 'dolist "cl-macs" nil nil 'macro)
 188     (autoload 'enriched-decode "enriched")
 189     (autoload 'eudc-expand-inline "eudc" nil t)
 190     (autoload 'executable-find "executable")
 191     (autoload 'font-lock-fontify-buffer "font-lock" nil t)
 192     (when (and (emacs-version>= 21 5)
 193                (not (featurep 'sxemacs)))
 194       (autoload 'get-display-table "disp-table")
 195       (autoload 'put-display-table "disp-table"))
 196     (autoload 'info "info" nil t)
 197     (autoload 'mail-extract-address-components "mail-extr")
 198     (autoload 'mail-fetch-field "mail-utils")
 199     (autoload 'make-annotation "annotations")
 200     (autoload 'make-display-table "disp-table")
 201     (autoload 'pp "pp")
 202     (autoload 'ps-despool "ps-print" nil t)
 203     (autoload 'ps-spool-buffer "ps-print" nil t)
 204     (autoload 'ps-spool-buffer-with-faces "ps-print" nil t)
 205     (autoload 'read-passwd "passwd")
 206     (autoload 'regexp-opt "regexp-opt")
 207     (autoload 'reporter-submit-bug-report "reporter")
 208     (if (condition-case nil
 209             (progn
 210               (require 'rot13)
 211               (not (fboundp 'rot13-string)))
 212           (error nil))
 213         (defmacro rot13-string (string)
 214           "Return ROT13 encryption of STRING."
 215           `(let ((string ,string))
 216              (with-temp-buffer
 217                (insert string)
 218                (translate-region (point-min) (point-max) ,rot13-display-table)
 219                (buffer-string)))))
 220     (if (and (emacs-version>= 21 5)
 221              (not (featurep 'sxemacs)))
 222         (autoload 'setenv "process" nil t)
 223       (autoload 'setenv "env" nil t))
 224     (autoload 'sgml-mode "psgml" nil t)
 225     (autoload 'smtpmail-send-it "smtpmail")
 226     (autoload 'sort-numeric-fields "sort" nil t)
 227     (autoload 'sort-subr "sort")
 228     (autoload 'thing-at-point "thingatpt")
 229     (autoload 'toggle-truncate-lines "view-less" nil t)
 230     (autoload 'trace-function-background "trace" nil t)
 231     (autoload 'unmorse-region "morse" nil t)
 232     (autoload 'w3-do-setup "w3")
 233     (autoload 'w3-prepare-buffer "w3-display")
 234     (autoload 'w3-region "w3-display" nil t)
 235     (defalias 'frame-char-height 'frame-height)
 236     (defalias 'frame-char-width 'frame-width)
 237     (defalias 'frame-parameter 'frame-property)
 238     (defalias 'make-overlay 'ignore)
 239     (defalias 'overlay-end 'ignore)
 240     (defalias 'overlay-get 'ignore)
 241     (defalias 'overlay-put 'ignore)
 242     (defalias 'overlay-start 'ignore)
 243     (defalias 'overlays-in 'ignore)
 244     (defalias 'replace-dehighlight 'ignore)
 245     (defalias 'replace-highlight 'ignore)
 246     (defalias 'gnutls-available-p 'ignore)
 247     (defvar timer-list nil)
 248     (defvar scroll-margin 0)
 249     (defalias 'w3-coding-system-for-mime-charset 'ignore)))
 250
 251 (defun dgnushack-emacs-compile-defcustom-p ()
 252   "Return non-nil if Emacs byte compiles `defcustom' forms.
 253 Those Emacsen will warn against undefined variables and functions used
 254 in `defcustom' forms."
 255   (let ((outbuf (with-temp-buffer
 256                   (insert "(defcustom foo (1+ (random)) \"\" :group 'emacs)\n")
 257                   (byte-compile-from-buffer (current-buffer) "foo.el"))))
 258     (when outbuf
 259       (prog1
 260           (with-current-buffer outbuf
 261             (goto-char (point-min))
 262             (search-forward " 'foo '(byte-code " nil t))
 263         (kill-buffer outbuf)))))
 264
 265 (when (and (featurep 'xemacs)
 266            (dgnushack-emacs-compile-defcustom-p))
 267   (maybe-fbind '(defined-colors face-attribute))
 268   (maybe-bind '(idna-program installation-directory)))
 269
 270 (when (featurep 'xemacs)
 271   (defadvice byte-optimize-apply (before use-mapcan (form) activate)
 272     "Replace (apply 'nconc (mapcar ...)) with (mapcan ...)."
 273     (let ((last (nth (1- (length form)) form)))
 274       (when (and (eq last (third form))
 275                  (consp last)
 276                  (eq 'mapcar (car last))
 277                  (equal (nth 1 form) ''nconc))
 278         (setq form (cons 'mapcan (cdr last)))))))
 279
 280 (defun dgnushack-compile-verbosely ()
 281   "Call dgnushack-compile with warnings ENABLED.  If you are compiling
 282 patches to gnus, you should consider modifying make.bat to call
 283 dgnushack-compile-verbosely.  All other users should continue to use
 284 dgnushack-compile."
 285   (dgnushack-compile t))
 286
 287 (defun dgnushack-compile-error-on-warn ()
 288   "Call dgnushack-compile with minimal warnings, but with error-on-warn ENABLED.
 289 This means that every warning will be reported as an error."
 290   (unless (dgnushack-compile nil t)
 291     (error "Error during byte compilation (warnings were reported as errors!).")))
 292
 293 (defun dgnushack-compile (&optional warn error-on-warn)
 294   ;;(setq byte-compile-dynamic t)
 295   (unless warn
 296     (setq byte-compile-warnings
 297           '(free-vars unresolved callargs redefine suspicious)))
 298   (let ((files (directory-files srcdir nil "^[^=].*\\.el$"))
 299         (compilesuccess t)
 300         ;;(byte-compile-generate-call-tree t)
 301         file elc)
 302     ;; Avoid barfing (from gnus-xmas) because the etc directory is not yet
 303     ;; installed.
 304     (when (featurep 'xemacs)
 305       (setq gnus-xmas-glyph-directory "dummy"))
 306     (dolist (file '(".dir-locals.el" "dgnushack.el" "lpath.el"))
 307       (setq files (delete file files)))
 308     (when (featurep 'base64)
 309       (setq files (delete "base64.el" files)))
 310     (condition-case code
 311         (require 'w3-parse)
 312       (error
 313        (message "No w3: %s %s" (cadr code) (or (locate-library "w3-parse") ""))
 314        (dolist (file '("webmail.el" "nnwfm.el"))
 315          (setq files (delete file files)))))
 316     (condition-case code
 317         ;; Under XEmacs 21.4 this loads easy-mmode.elc that provides
 318         ;; the Emacs functions `propertize' and `replace-regexp-in-string'.
 319         (require 'mh-e)
 320       (error
 321        (message "No mh-e: %s %s" (cadr code) (or (locate-library "mh-e") ""))
 322        (setq files (delete "gnus-mh.el" files))))
 323     (condition-case code
 324         (require 'xml)
 325       (error
 326        (message "No xml: %s %s" (cadr code) (or (locate-library "xml") ""))
 327        (setq files (delete "nnrss.el" files))))
 328     (dolist (file
 329              (if (featurep 'xemacs)
 330                  '("md5.el")
 331                '("gnus-xmas.el" "messagexmas.el" "nnheaderxm.el")))
 332       (setq files (delete file files)))
 333     (unless (and (fboundp 'libxml-parse-html-region)
 334                  ;; lpath.el binds it.
 335                  (not (eq (symbol-function 'libxml-parse-html-region)
 336                           'ignore)))
 337       (dolist (file '("color.el" "shr-color.el" "shr.el"))
 338         (setq files (delete file files))))
 339     (unless (locate-library "epg")
 340       (setq files (delete "plstore.el" files)))
 341
 342     (dolist (file files)
 343       (setq file (expand-file-name file srcdir))
 344       (when (and (file-exists-p
 345                   (setq elc (concat (file-name-nondirectory file) "c")))
 346                  (file-newer-than-file-p file elc))
 347         (delete-file elc)))
 348
 349     (while (setq file (pop files))
 350       (setq file (expand-file-name file srcdir))
 351       (when (or (not (file-exists-p
 352                       (setq elc (concat (file-name-nondirectory file) "c"))))
 353                 (file-newer-than-file-p file elc))
 354         (if error-on-warn
 355             (let ((byte-compile-error-on-warn t))
 356               (unless (ignore-errors
 357                         (byte-compile-file file))
 358                 (setq compilesuccess nil)))
 359           (ignore-errors
 360             (byte-compile-file file)))))
 361     compilesuccess))
 362
 363 (defun dgnushack-recompile ()
 364   (require 'gnus)
 365   (byte-recompile-directory "." 0))
 366
 367 (defvar dgnushack-gnus-load-file
 368   (if (featurep 'xemacs)
 369       (expand-file-name "auto-autoloads.el")
 370     (expand-file-name "gnus-load.el")))
 371
 372 (defvar dgnushack-cus-load-file
 373   (if (featurep 'xemacs)
 374       (expand-file-name "custom-load.el")
 375     (expand-file-name "cus-load.el")))
 376
 377 (defun dgnushack-make-cus-load ()
 378   (load "cus-dep")
 379   (let ((cusload-base-file dgnushack-cus-load-file))
 380     (defadvice directory-files (after exclude-dir-locals activate)
 381       "Exclude .dir-locals.el file."
 382       (dolist (file ad-return-value)
 383         (if (string-match "\\(?:\\`\\|/\\)\\.dir-locals\\.el\\'" file)
 384             (setq ad-return-value (delete file ad-return-value)))))
 385     (unwind-protect
 386         (if (fboundp 'custom-make-dependencies)
 387             (custom-make-dependencies)
 388           (Custom-make-dependencies))
 389       (ad-unadvise 'directory-files))
 390     (when (featurep 'xemacs)
 391       (message "Compiling %s..." dgnushack-cus-load-file)
 392       (byte-compile-file dgnushack-cus-load-file))))
 393
 394 (defun dgnushack-make-auto-load ()
 395   (require 'autoload)
 396   (let ((generated-autoload-file dgnushack-gnus-load-file)
 397         (make-backup-files nil)
 398         (autoload-package-name "gnus"))
 399     (if (featurep 'xemacs)
 400         (if (file-exists-p generated-autoload-file)
 401             (delete-file generated-autoload-file))
 402       (with-temp-file generated-autoload-file
 403         (insert ?\014)))
 404     (defadvice directory-files (after exclude-dir-locals activate)
 405       "Exclude .dir-locals.el file."
 406       (dolist (file ad-return-value)
 407         (if (string-match "\\(?:\\`\\|/\\)\\.dir-locals\\.el\\'" file)
 408             (setq ad-return-value (delete file ad-return-value)))))
 409     (unwind-protect
 410         (batch-update-autoloads)
 411       (ad-unadvise 'directory-files))))
 412
 413 (defun dgnushack-make-load ()
 414   (unless (featurep 'xemacs)
 415     (message "Generating %s..." dgnushack-gnus-load-file)
 416     (with-temp-file dgnushack-gnus-load-file
 417       (insert-file-contents dgnushack-cus-load-file)
 418       (delete-file dgnushack-cus-load-file)
 419       (goto-char (point-min))
 420       (search-forward ";;; Code:")
 421       (forward-line)
 422       (delete-region (point-min) (point))
 423       (insert "\
 424 ;;; gnus-load.el --- automatically extracted custom dependencies and autoload
 425 ;;
 426 ;;; Code:
 427 ")
 428       (goto-char (point-max))
 429       (if (search-backward "custom-versions-load-alist" nil t)
 430           (forward-line -1)
 431         (forward-line -1)
 432         (while (eq (char-after) ?\;)
 433           (forward-line -1))
 434         (forward-line))
 435       (delete-region (point) (point-max))
 436       (insert "\n")
 437       ;; smiley-* are duplicated. Remove them all.
 438       (let ((point (point)))
 439         (insert-file-contents dgnushack-gnus-load-file)
 440         (goto-char point)
 441         (while (search-forward "smiley-" nil t)
 442           (beginning-of-line)
 443           (if (looking-at "(autoload ")
 444               (delete-region (point) (progn (forward-sexp) (point)))
 445             (forward-line))))
 446       ;;
 447       (goto-char (point-max))
 448       (when (search-backward "\n(provide " nil t)
 449         (forward-line -1)
 450         (delete-region (point) (point-max)))
 451       (insert "\
 452
 453 \(provide 'gnus-load)
 454
 455 ;;; Local Variables:
 456 ;;; version-control: never
 457 ;;; no-byte-compile: t
 458 ;;; no-update-autoloads: t
 459 ;;; End:
 460 ;;; gnus-load.el ends here
 461 ")
 462       ))
 463   (message "Compiling %s..." dgnushack-gnus-load-file)
 464   (byte-compile-file dgnushack-gnus-load-file)
 465   (when (featurep 'xemacs)
 466     (message "Creating dummy gnus-load.el...")
 467     (with-temp-file (expand-file-name "gnus-load.el")
 468       (insert "\
 469
 470 \(provide 'gnus-load)
 471
 472 ;;; Local Variables:
 473 ;;; version-control: never
 474 ;;; no-byte-compile: t
 475 ;;; no-update-autoloads: t
 476 ;;; End:
 477 ;;; gnus-load.el ends here"))))
 478
 479 (defun dgnushack-find-lisp-shadows (&optional lispdir)
 480   "Return a list of directories in which other Gnus installations exist.
 481 This function looks for the other Gnus installations which will shadow
 482 the new Gnus Lisp modules which have been installed in LISPDIR, using
 483 the default `load-path'.  The return value will make sense only when
 484 LISPDIR is existent and is listed in the default `load-path'.  Assume
 485 LISPDIR will be prepended to `load-path' by a user if the default
 486 `load-path' does not contain it."
 487   (unless lispdir
 488     (setq lispdir (getenv "lispdir")))
 489   (when (and lispdir (file-directory-p lispdir))
 490     (setq lispdir (file-truename (directory-file-name lispdir)))
 491     (let ((indices '("gnus.elc" "gnus.el" "gnus.el.bz2" "gnus.el.gz"
 492                      "message.elc" "message.el" "message.el.bz2"
 493                      "message.el.gz"))
 494           (path (delq nil (mapcar
 495                            (lambda (p)
 496                              (condition-case nil
 497                                  (when (and p (file-directory-p p))
 498                                    (file-truename (directory-file-name p)))
 499                                (error nil)))
 500                            dgnushack-default-load-path)))
 501           rest elcs)
 502       (while path
 503         (setq rest (cons (car path) rest)
 504               path (delete (car rest) (cdr path))))
 505       (setq path (nreverse (cdr (member lispdir rest)))
 506             rest nil)
 507       (while path
 508         (setq elcs indices)
 509         (while elcs
 510           (when (file-exists-p (expand-file-name (pop elcs) (car path)))
 511             (setq rest (cons (car path) rest)
 512                   elcs nil)))
 513         (setq path (cdr path)))
 514       (prog1
 515           (setq path (nreverse rest))
 516         (when path
 517           (let (print-level print-length)
 518             (princ (concat "\n\
 519 WARNING: The other Gnus installation" (if (cdr path) "s have" " has") "\
 520  been detected in:\n\n  " (mapconcat 'identity path "\n  ") "\n\n\
 521 You will need to modify the run-time `load-path', remove them manually,
 522 or remove them using `make remove-installed-shadows'.\n\n"))))))))
 523
 524 (defun dgnushack-remove-lisp-shadows (&optional lispdir)
 525   "Remove the other Gnus installations which shadow the recent one."
 526   (let ((path (with-temp-buffer
 527                 (let ((standard-output (current-buffer)))
 528                   (dgnushack-find-lisp-shadows lispdir))))
 529         elcs files shadows file)
 530     (when path
 531       (unless (setq elcs (directory-files srcdir nil "\\.elc\\'"))
 532         (error "You should build .elc files first."))
 533       (setq files
 534             (apply
 535              'append
 536              (mapcar
 537               (lambda (el)
 538                 (list (concat el "c") el (concat el ".bz2") (concat el ".gz")))
 539               (append
 540                (list (file-name-nondirectory dgnushack-gnus-load-file)
 541                      (file-name-nondirectory dgnushack-cus-load-file))
 542                (mapcar (lambda (elc) (substring elc 0 -1)) elcs)))))
 543       (while path
 544         (setq shadows files)
 545         (while shadows
 546           (setq file (expand-file-name (pop shadows) (car path)))
 547           (when (file-exists-p file)
 548             (princ (concat "  Removing " file "..."))
 549             (condition-case nil
 550                 (progn
 551                   (delete-file file)
 552                   (princ "done\n"))
 553               (error (princ "failed\n")))))
 554         (setq path (cdr path))))))
 555
 556 (unless (fboundp 'with-demoted-errors)
 557   (defmacro with-demoted-errors (&rest body)
 558     "Run BODY and demote any errors to simple messages.
 559 If `debug-on-error' is non-nil, run BODY without catching its errors.
 560 This is to be used around code which is not expected to signal an error
 561 but which should be robust in the unexpected case that an error is signaled."
 562     (declare (debug t) (indent 0))
 563     (let ((err (make-symbol "err")))
 564       `(condition-case ,err
 565            (progn ,@body)
 566          (error (message "Error: %S" ,err) nil)))))
 567
 568 ;; XEmacs's `define-obsolete-variable-alias' takes only two arguments:
 569 ;; (define-obsolete-variable-alias OLDVAR NEWVAR)
 570 (condition-case nil
 571     (progn
 572       (defvar dgnushack-obsolete-name nil)
 573       (defvar dgnushack-current-name nil)
 574       (unwind-protect
 575           (define-obsolete-variable-alias
 576             'dgnushack-obsolete-name 'dgnushack-current-name "0")
 577         (makunbound 'dgnushack-obsolete-name)
 578         (makunbound 'dgnushack-current-name)))
 579   (wrong-number-of-arguments
 580    (defadvice define-obsolete-variable-alias (around ignore-rest-args
 581                                                      (oldvar newvar &rest args)
 582                                                      activate)
 583      "Ignore arguments other than the 1st and the 2nd ones."
 584      ad-do-it)
 585    (put 'define-obsolete-variable-alias 'byte-optimizer
 586         (lambda (form)
 587           (setcdr (nthcdr 2 form) nil)
 588           form))))
 589
 590 ;;; dgnushack.el ends here