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   1 ;;; package-admin.el --- Installation and Maintenance of SXEmacs packages
   2
   3 ;; Copyright (C) 1997 by Free Software Foundation, Inc.
   4 ;; Copyright (C) 2003, 2004 Steve Youngs.
   5
   6 ;; Author: SL Baur <steve@xemacs.org>
   7 ;; Keywords: internal
   8
   9 ;; This file is part of SXEmacs.
  10
  11 ;; SXEmacs is free software: you can redistribute it and/or modify
  12 ;; it under the terms of the GNU General Public License as published by
  13 ;; the Free Software Foundation, either version 3 of the License, or
  14 ;; (at your option) any later version.
  15
  16 ;; SXEmacs is distributed in the hope that it will be useful,
  17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 ;; GNU General Public License for more details.
  20
  21 ;; You should have received a copy of the GNU General Public License
  22 ;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23
  24 ;;; Synched up with: Not in FSF
  25
  26 ;;; Commentary:
  27
  28 ;; First pass at lisp front end to package maintenance.
  29
  30 ;;; Code:
  31
  32 (require 'config)
  33
  34 (defvar package-admin-sxemacs (concat invocation-directory invocation-name)
  35   "Location of SXEmacs binary to use.")
  36
  37 (defvar package-admin-temp-buffer "*Package Output*"
  38   "Temporary buffer where output of backend commands is saved.")
  39
  40 (defvar package-admin-install-function 'package-admin-default-install-function
  41   "The function to call to install a package.
  42 Three args are passed: FILENAME PKG-DIR BUFFER
  43 Install package FILENAME into directory PKG-DIR, with any messages output
  44 to buffer BUFFER.")
  45
  46 (defvar package-admin-error-messages '(
  47                                        "No space left on device"
  48                                        "No such file or directory"
  49                                        "Filename too long"
  50                                        "Read-only file system"
  51                                        "File too large"
  52                                        "Too many open files"
  53                                        "Not enough space"
  54                                        "Permission denied"
  55                                        "Input/output error"
  56                                        "Out of memory"
  57                                        "Unable to create directory"
  58                                        "Directory checksum error"
  59                                        "Cannot exclusively open file"
  60                                        "corrupted file"
  61                                        "incomplete .* tree"
  62                                        "Bad table"
  63                                        "corrupt input"
  64                                        "invalid compressed data"
  65                                        "too many leaves in Huffman tree"
  66                                        "not a valid zip file"
  67                                        "first entry not deflated or stored"
  68                                        "encrypted file --"
  69                                        "unexpected end of file"
  70                                        )
  71   "Regular expressions of possible error messages.
  72 After each package extraction, the `package-admin-temp-buffer' buffer is
  73 scanned for these messages.  An error code is returned if one of these are
  74 found.
  75
  76 This is awful, but it exists because error return codes aren't reliable
  77 under MS Windows.")
  78
  79 (defvar package-admin-tar-filename-regexps
  80   '(
  81     ;; GNU tar:
  82     ;; drwxrwxr-x john/doe 123 1997-02-18 15:48 pathname
  83     "\\S-+\\s-+[-a-z0-9_/]+\\s-+[0-9]+\\s-+[-0-9]+\\s-+[0-9:]+\\s-+\\(\\S-.*\\)"
  84     ;; HP-UX & SunOS tar:
  85     ;; rwxrwxr-x 501/501    123 Feb 18 15:46 1997 pathname
  86     ;; Solaris tar (phooey!):
  87     ;; rwxrwxr-x501/501    123 Feb 18 15:46 1997 pathname
  88     ;; AIX tar:
  89     ;; -rw-r--r-- 147 1019   32919 Mar 26 12:00:09 1992 pathname
  90     "\\S-+\\s-*[-a-z0-9_]+[/ ][-a-z0-9_]+\\s-+[0-9]+\\s-+[a-z][a-z][a-z]\\s-+[0-9]+\\s-+[0-9:]+\\s-+[0-9]+\\s-+\\(\\S-.*\\)"
  91
  92     ;; djtar:
  93     ;; drwx Aug 31 02:01:41 1998       123 pathname
  94     "\\S-+\\s-+[a-z][a-z][a-z]\\s-+[0-9]+\\s-+[0-9:]+\\s-+[0-9]+\\s-+[0-9]+\\s-+\\(\\S-.*\\)"
  95
  96     )
  97   "List of regexps to use to search for tar filenames.
  98 Note that \"\\(\" and \"\\)\" must be used to delimit the pathname (as
  99 match #1).  Don't put \"^\" to match the beginning of the line; this
 100 is already implicit, as `looking-at' is used.  Filenames can,
 101 unfortunately, contain spaces, so be careful in constructing any
 102 regexps.")
 103
 104 (defvar package-install-hook nil
 105   "*List of hook functions to be called when a new package is successfully
 106 installed. The hook function is passed two arguments: the package name, and
 107 the install directory.")
 108
 109 (defvar package-delete-hook nil
 110   "*List of hook functions to be called when a package is deleted. The
 111 hook is called *before* the package is deleted. The hook function is passed
 112 two arguments: the package name, and the install directory.")
 113
 114 (defun package-admin-default-install-function (filename pkg-dir buffer)
 115   "Default function to install a package.
 116 Install package FILENAME into directory PKG-DIR, with any messages output
 117 to BUFFER."
 118   (let* ((pkg-dir (file-name-as-directory pkg-dir))
 119          (default-directory pkg-dir)
 120          (filename (expand-file-name filename)))
 121     (unless (file-directory-p pkg-dir)
 122       (make-directory pkg-dir t))
 123     ;; Don't assume GNU tar.
 124     (if (shell-command (concat "gunzip -c " filename " | tar xvf -") buffer)
 125         0
 126       1)))
 127
 128 ;; A few things needed by the following 2 functions.
 129 (eval-when-compile
 130   (require 'packages)
 131   (autoload 'package-get-info "package-get")
 132   (autoload 'paths-decode-directory-path "find-paths")
 133   (defvar package-get-install-to-user-init-directory))
 134
 135 (defun package-admin-find-top-directory (type &optional user-dir)
 136   "Return the top level directory for a package.
 137
 138 Argument TYPE is a symbol that determines the type of package we're
 139 trying to find a directory for.
 140
 141 Optional Argument USER-DIR if non-nil use directories off
 142 `user-init-directory'.  This overrides everything except
 143 \"EMACSPACKAGEPATH\".
 144
 145 This function honours the environment variable \"EMACSPACKAGEPATH\"
 146 and returns directories found there as a priority.  If that variable
 147 doesn't exist and USER-DIR is nil, check in the normal places.
 148
 149 If we still can't find a suitable directory, return nil.
 150
 151 Possible values for TYPE are:
 152
 153     sxemacs == For \"sxemacs\" packages that go in '/sxemacs-packages/'
 154     std     == For \"standard\" packages that go in '/xemacs-packages/'
 155     mule    == For \"mule\" packages that go in '/mule-packages/'
 156     site    == For \"unsupported\" packages that go in '/site-packages/'
 157
 158 "
 159   (let* ((env-value (getenv "EMACSPACKAGEPATH"))
 160          top-dir)
 161     ;; First, check the environment var.
 162     (if env-value
 163         (let ((path-list (paths-decode-directory-path env-value 'drop-empties)))
 164           (cond ((eq type 'site)
 165                  (while path-list
 166                    (if (equal (file-name-nondirectory
 167                                (directory-file-name (car path-list)))
 168                               "site-packages")
 169                        (setq top-dir (car path-list)))
 170                    (setq path-list (cdr path-list))))
 171                 ((eq type 'sxemacs)
 172                  (while path-list
 173                    (if (equal (file-name-nondirectory
 174                                (directory-file-name (car path-list)))
 175                               "sxemacs-packages")
 176                        (setq top-dir (car path-list)))
 177                    (setq path-list (cdr path-list))))
 178                 ((eq type 'std)
 179                  (while path-list
 180                    (if (equal (file-name-nondirectory
 181                                (directory-file-name (car path-list)))
 182                               "xemacs-packages")
 183                        (setq top-dir (car path-list)))
 184                    (setq path-list (cdr path-list))))
 185                 ((eq type 'mule)
 186                  (while path-list
 187                    (if (equal (file-name-nondirectory
 188                                (directory-file-name (car path-list)))
 189                               "mule-packages")
 190                        (setq top-dir (car path-list)))
 191                    (setq path-list (cdr path-list)))))))
 192     ;; Wasn't in the environment, try `user-init-directory' if
 193     ;; USER-DIR is non-nil.
 194     (if (and user-dir
 195              (not top-dir))
 196         (cond ((eq type 'site)
 197                (setq top-dir (file-name-as-directory
 198                               (expand-file-name "site-packages" user-init-directory))))
 199               ((eq type 'sxemacs)
 200                (setq top-dir (file-name-as-directory
 201                               (expand-file-name "sxemacs-packages" user-init-directory))))
 202               ((eq type 'std)
 203                (setq top-dir (file-name-as-directory
 204                               (expand-file-name "xemacs-packages" user-init-directory))))
 205               ((eq type 'mule)
 206                (setq top-dir (file-name-as-directory
 207                               (expand-file-name "mule-packages" user-init-directory))))))
 208     ;; Finally check the normal places
 209     (if (not top-dir)
 210         (let ((path-list (nth 1 (packages-find-packages
 211                                  emacs-roots
 212                                  (packages-compute-package-locations user-init-directory)))))
 213           (cond ((eq type 'site)
 214                  (while path-list
 215                    (if (equal (file-name-nondirectory
 216                                (directory-file-name (car path-list)))
 217                               "site-packages")
 218                        (setq top-dir (car path-list)))
 219                    (setq path-list (cdr path-list))))
 220                 ((eq type 'sxemacs)
 221                  (while path-list
 222                    (if (equal (file-name-nondirectory
 223                                (directory-file-name (car path-list)))
 224                               "sxemacs-packages")
 225                        (setq top-dir (car path-list)))
 226                    (setq path-list (cdr path-list))))
 227                 ((eq type 'std)
 228                  (while path-list
 229                    (if (equal (file-name-nondirectory
 230                                (directory-file-name (car path-list)))
 231                               "xemacs-packages")
 232                        (setq top-dir (car path-list)))
 233                    (setq path-list (cdr path-list))))
 234                 ((eq type 'mule)
 235                  (while path-list
 236                    (if (equal (file-name-nondirectory
 237                                (directory-file-name (car path-list)))
 238                               "mule-packages")
 239                        (setq top-dir (car path-list)))
 240                    (setq path-list (cdr path-list)))))))
 241     ;; Now return either the directory or nil.
 242     top-dir))
 243
 244 (defun package-admin-get-install-dir (package &optional pkg-dir)
 245   "Find a suitable installation directory for a package.
 246
 247 Argument PACKAGE is the package to find a installation directory for.
 248 Optional Argument PKG-DIR, if non-nil is a directory to use for
 249 installation.
 250
 251 If PKG-DIR is non-nil and writable, return that.  Otherwise check to
 252 see if the PACKAGE is already installed and return that location, if
 253 it is writable.  Finally, fall back to the `user-init-directory' if
 254 all else fails.  As a side effect of installing packages under
 255 `user-init-directory' these packages become part of `early-packages'."
 256   ;; If pkg-dir specified, return that if writable.
 257   (if (and pkg-dir
 258            (file-writable-p (directory-file-name pkg-dir)))
 259       pkg-dir
 260     ;; If the user want her packages under ~/.sxemacs/, do so.
 261     (let ((type (package-get-info package 'category)))
 262       (if package-get-install-to-user-init-directory
 263           (progn
 264             (cond ((equal type "site")
 265                    (setq pkg-dir (package-admin-find-top-directory 'site 'user-dir)))
 266                   ((equal type "sxemacs")
 267                    (setq pkg-dir (package-admin-find-top-directory 'sxemacs 'user-dir)))
 268                   ((equal type "standard")
 269                    (setq pkg-dir (package-admin-find-top-directory 'std 'user-dir)))
 270                   ((equal type "mule")
 271                    (setq pkg-dir (package-admin-find-top-directory 'mule 'user-dir))))
 272             pkg-dir)
 273         ;; Maybe the package has been installed before, if so, return
 274         ;; that directory.
 275         (let ((package-feature (intern-soft (concat
 276                                              (symbol-name package) "-autoloads")))
 277               autoload-dir)
 278           (when (and (not (eq package 'unknown))
 279                      (featurep package-feature)
 280                      (setq autoload-dir (feature-file package-feature))
 281                      (setq autoload-dir (file-name-directory autoload-dir))
 282                      (member autoload-dir (append early-package-load-path late-package-load-path)))
 283             ;; Find the corresponding entry in late-package
 284             (setq pkg-dir
 285                   (car-safe (member-if (lambda (h)
 286                                          (string-match (concat "^" (regexp-quote h))
 287                                                        autoload-dir))
 288                                        (append (cdr early-packages) late-packages)))))
 289           (if (and pkg-dir
 290                    (file-writable-p (directory-file-name pkg-dir)))
 291               pkg-dir
 292             ;; OK, the package hasn't been previously installed so we need
 293             ;; to guess where it should go.
 294             (cond ((equal type "site")
 295                    (setq pkg-dir (package-admin-find-top-directory 'site)))
 296                   ((equal type "sxemacs")
 297                    (setq pkg-dir (package-admin-find-top-directory 'sxemacs)))
 298                   ((equal type "standard")
 299                    (setq pkg-dir (package-admin-find-top-directory 'std)))
 300                   ((equal type "mule")
 301                    (setq pkg-dir (package-admin-find-top-directory 'mule)))
 302                   (t
 303                    (error 'invalid-operation
 304                           "Invalid package type")))
 305             (if (and pkg-dir
 306                      (file-writable-p (directory-file-name pkg-dir)))
 307                 pkg-dir
 308               ;; Oh no!  Either we still haven't found a suitable
 309               ;; directory, or we can't write to the one we did find.
 310               ;; Drop back to the `user-init-directory'.
 311               (if (y-or-n-p (format "Directory isn't writable, use %s instead? "
 312                                     user-init-directory))
 313                   (progn
 314                     (cond ((equal type "site")
 315                            (setq pkg-dir (package-admin-find-top-directory 'site 'user-dir)))
 316                           ((equal type "sxemacs")
 317                            (setq pkg-dir (package-admin-find-top-directory 'sxemacs 'user-dir)))
 318                           ((equal type "standard")
 319                            (setq pkg-dir (package-admin-find-top-directory 'std 'user-dir)))
 320                           ((equal type "mule")
 321                            (setq pkg-dir (package-admin-find-top-directory 'mule 'user-dir)))
 322                           (t
 323                            (error 'invalid-operation
 324                                   "Invalid package type")))
 325                     ;; Turn on `package-get-install-to-user-init-directory'
 326                     ;; so we don't get asked for each package we try to
 327                     ;; install in this session.
 328                     (setq package-get-install-to-user-init-directory t)
 329                     pkg-dir)
 330                 ;; If we get to here SXEmacs can't make up its mind and
 331                 ;; neither can the user, nothing left to do except barf. :-(
 332                 (error 'search-failed
 333                        (format
 334                         "Can't find suitable installation directory for package: %s"
 335                         package))))))))))
 336
 337 (defun package-admin-get-manifest-file (pkg-topdir package)
 338   "Return the name of the MANIFEST file for package PACKAGE.
 339 Note that PACKAGE is a symbol, and not a string."
 340   (let ((dir (file-name-as-directory
 341               (expand-file-name "pkginfo" pkg-topdir))))
 342     (expand-file-name (concat "MANIFEST." (symbol-name package)) dir)))
 343
 344 (defun package-admin-check-manifest (pkg-outbuf pkg-topdir)
 345   "Check for a MANIFEST.<package> file in the package distribution.
 346 If it doesn't exist, create and write one.
 347 PKG-OUTBUF is the buffer that holds the output from `tar', and PKG-TOPDIR
 348 is the top-level directory under which the package was installed."
 349   (let ((manifest-buf " *pkg-manifest*")
 350         (old-case-fold-search case-fold-search)
 351         regexp package-name pathname regexps)
 352     (unwind-protect
 353         (save-excursion                         ;; Probably redundant.
 354           (set-buffer (get-buffer pkg-outbuf))  ;; Probably already the current buffer.
 355           (goto-char (point-min))
 356
 357           ;; Make filenames case-insensitive, if necessary
 358           (if (eq system-type 'windows-nt)
 359               (setq case-fold-search t))
 360
 361           (setq regexp (concat "\\bpkginfo"
 362                                (char-to-string directory-sep-char)
 363                                "MANIFEST\\...*"))
 364
 365           ;; Look for the manifest.
 366           (if (not (re-search-forward regexp nil t))
 367               (progn
 368                 ;; We didn't find a manifest.  Make one.
 369
 370                 ;; Yuk.  We weren't passed the package name, and so we have
 371                 ;; to dig for it.  Look for it as the subdirectory name below
 372                 ;; "lisp", or "man".
 373                 ;; Here, we don't use a single regexp because we want to search
 374                 ;; the directories for a package name in a particular order.
 375                 (if (catch 'done
 376                       (let ((dirs '("lisp" "man"))
 377                             rexp)
 378                         (while dirs
 379                           (setq rexp (concat "\\b" (car dirs)
 380                                              "[\\/]\\([^\\/]+\\)[\//]"))
 381                           (if (re-search-forward rexp nil t)
 382                               (throw 'done t))
 383                           (setq dirs (cdr dirs)))))
 384                     (progn
 385                       (setq package-name (buffer-substring (match-beginning 1)
 386                                                            (match-end 1)))
 387
 388                       ;; Get and erase the manifest buffer
 389                       (setq manifest-buf (get-buffer-create manifest-buf))
 390                       (buffer-disable-undo manifest-buf)
 391                       (erase-buffer manifest-buf)
 392
 393                       ;; Now, scan through the output buffer, looking for
 394                       ;; file and directory names.
 395                       (goto-char (point-min))
 396                       ;; for each line ...
 397                       (while (< (point) (point-max))
 398                         (beginning-of-line)
 399                         (setq pathname nil)
 400
 401                         ;; scan through the regexps, looking for a pathname
 402                         (if (catch 'found-path
 403                               (setq regexps package-admin-tar-filename-regexps)
 404                               (while regexps
 405                                 (if (looking-at (car regexps))
 406                                     (progn
 407                                       (setq pathname
 408                                             (buffer-substring
 409                                              (match-beginning 1)
 410                                              (match-end 1)))
 411                                       (throw 'found-path t)))
 412                                 (setq regexps (cdr regexps))))
 413                             (progn
 414                               ;; found a pathname -- add it to the manifest
 415                               ;; buffer
 416                               (save-excursion
 417                                 (set-buffer manifest-buf)
 418                                 (goto-char (point-max))
 419                                 (insert pathname "\n"))))
 420                         (forward-line 1))
 421
 422                       ;; Processed all lines.
 423                       ;; Now, create the file, pkginfo/MANIFEST.<pkgname>
 424
 425                       ;; We use `expand-file-name' instead of `concat',
 426                       ;; for portability.
 427                       (setq pathname (expand-file-name "pkginfo"
 428                                                        pkg-topdir))
 429                       ;; Create pkginfo, if necessary
 430                       (if (not (file-directory-p pathname))
 431                           (make-directory pathname))
 432                       (setq pathname (expand-file-name
 433                                       (concat "MANIFEST." package-name)
 434                                       pathname))
 435                       (save-excursion
 436                         (set-buffer manifest-buf)
 437                         ;; Put the files in sorted order
 438                         (if-fboundp 'sort-lines
 439                             (sort-lines nil (point-min) (point-max))
 440                           (warn "`xemacs-base' not installed, MANIFEST.%s not sorted"
 441                                 package-name))
 442                         ;; Write the file.
 443                         ;; Note that using `write-region' *BYPASSES* any check
 444                         ;; to see if SXEmacs is currently editing/visiting the
 445                         ;; file.
 446                         (write-region (point-min) (point-max) pathname))
 447                       (kill-buffer manifest-buf))))))
 448       ;; Restore old case-fold-search status
 449       (setq case-fold-search old-case-fold-search))))
 450
 451 ;;;###autoload
 452 (defun package-admin-add-binary-package (file &optional pkg-dir)
 453   "Install a pre-bytecompiled XEmacs package into package hierarchy."
 454   (interactive "fPackage tarball: ")
 455   (let ((buf (get-buffer-create package-admin-temp-buffer))
 456         (status 1)
 457         start err-list)
 458     (setq pkg-dir (package-admin-get-install-dir 'unknown pkg-dir))
 459     ;; Ensure that the current directory doesn't change
 460     (save-excursion
 461       (set-buffer buf)
 462       ;; This is not really needed
 463       (setq default-directory (file-name-as-directory pkg-dir))
 464       (setq case-fold-search t)
 465       (buffer-disable-undo)
 466       (goto-char (setq start (point-max)))
 467       (if (= 0 (setq status (funcall package-admin-install-function
 468                                      file pkg-dir buf)))
 469           (progn
 470             ;; First, check for errors.
 471             ;; We can't necessarily rely upon process error codes.
 472             (catch 'done
 473               (goto-char start)
 474               (setq err-list package-admin-error-messages)
 475               (while err-list
 476                 (if (re-search-forward (car err-list) nil t)
 477                     (progn
 478                       (setq status 1)
 479                       (throw 'done nil)))
 480                 (setq err-list (cdr err-list))))
 481             ;; Make sure that the MANIFEST file exists
 482             (package-admin-check-manifest buf pkg-dir))))
 483     status))
 484
 485 (defun package-admin-rmtree (directory)
 486   "Delete a directory and all of its contents, recursively.
 487 This is a feeble attempt at making a portable rmdir."
 488   (setq directory (file-name-as-directory directory))
 489   (let ((files (directory-files directory nil nil nil t))
 490         (dirs (directory-files directory nil nil nil 'dirs)))
 491     (while dirs
 492       (if (not (member (car dirs) '("." "..")))
 493           (let ((dir (expand-file-name (car dirs) directory)))
 494             (condition-case err
 495                 (if (file-symlink-p dir) ;; just in case, handle symlinks
 496                     (delete-file dir)
 497                   (package-admin-rmtree dir))
 498               (file-error
 499                (message "%s: %s: \"%s\"" (nth 1 err) (nth 2 err) (nth 3 err)))))
 500         (setq dirs (cdr dirs))))
 501     (while files
 502       (condition-case err
 503           (delete-file (expand-file-name (car files) directory))
 504         (file-error
 505          (message "%s: %s: \"%s\"" (nth 1 err) (nth 2 err) (nth 3 err))))
 506       (setq files (cdr files)))
 507     (condition-case err
 508         (delete-directory directory)
 509       (file-error
 510        (message "%s: %s: \"%s\"" (nth 1 err) (nth 2 err) (nth 3 err))))))
 511
 512 (defun package-admin-get-lispdir  (pkg-topdir package)
 513   (let (package-lispdir)
 514     (if (and (setq package-lispdir (expand-file-name "lisp" pkg-topdir))
 515              (setq package-lispdir (expand-file-name (symbol-name package)
 516                                                      package-lispdir))
 517              (file-accessible-directory-p package-lispdir))
 518         package-lispdir)))
 519
 520 (defun package-admin-delete-binary-package (package pkg-topdir)
 521   "Delete a binary installation of PACKAGE below directory PKG-TOPDIR.
 522 PACKAGE is a symbol, not a string."
 523   (let (manifest-file package-lispdir dirs file)
 524     (setq pkg-topdir (package-admin-get-install-dir package pkg-topdir))
 525     (setq manifest-file (package-admin-get-manifest-file pkg-topdir package))
 526     (run-hook-with-args 'package-delete-hook package pkg-topdir)
 527     (if (file-exists-p manifest-file)
 528         (progn
 529           ;; The manifest file exists!  Use it to delete the old distribution.
 530           (message "Removing old files for package \"%s\" ..." package)
 531           (sit-for 0)
 532           (with-temp-buffer
 533             (buffer-disable-undo)
 534             (erase-buffer)
 535             (insert-file-contents manifest-file)
 536             (goto-char (point-min))
 537
 538             ;; For each entry in the MANIFEST ...
 539             (while (< (point) (point-max))
 540               (beginning-of-line)
 541               (setq file (expand-file-name (buffer-substring
 542                                             (point)
 543                                             (point-at-eol))
 544                                            pkg-topdir))
 545               (if (file-directory-p file)
 546                   ;; Keep a record of each directory
 547                   (setq dirs (cons file dirs))
 548                   ;; Delete each file.
 549                   ;; Make sure that the file is writable.
 550                   ;; (This is important under MS Windows.)
 551                   ;; I do not know why it important under MS Windows but
 552                   ;;    1. It bombs out when the file does not exist. This can be condition-cased
 553                   ;;    2. If I removed the write permissions, I do not want SXEmacs to just ignore them.
 554                   ;;       If it wants to, SXEmacs may ask, but that is about all
 555                   ;; (set-file-modes file 438) ;; 438 -> #o666
 556                   ;; Note, user might have removed the file!
 557                 (condition-case ()
 558                     (delete-file file)
 559                   (error nil)))         ;; We may want to turn the error into a Warning?
 560               (forward-line 1))
 561
 562             ;; Delete empty directories.
 563             (if dirs
 564                 (progn
 565                   (mapc
 566                    (lambda (dir)
 567                      (condition-case ()
 568                          (delete-directory dir)))
 569                    dirs)))
 570           ;; Delete the MANIFEST file
 571           ;; (set-file-modes manifest-file 438) ;; 438 -> #o666
 572           ;; Note. Packages can have MANIFEST in MANIFEST.
 573           (condition-case ()
 574               (delete-file manifest-file)
 575             (error nil)) ;; Do warning?
 576           (message "Removing old files for package \"%s\" ... done" package)))
 577       ;; The manifest file doesn't exist.  Fallback to just deleting the
 578       ;; package-specific lisp directory, if it exists.
 579       ;;
 580       ;; Delete old lisp directory, if any
 581       ;; Gads, this is ugly.  However, we're not supposed to use `concat'
 582       ;; in the name of portability.
 583       (setq package-lispdir (package-admin-get-lispdir pkg-topdir package))
 584       (when package-lispdir
 585         (message "Removing old lisp directory \"%s\" ..." package-lispdir)
 586         (sit-for 0)
 587         (package-admin-rmtree package-lispdir)
 588         (message "Removing old lisp directory \"%s\" ... done" package-lispdir)))
 589     ;; Delete the package from the database of installed packages.
 590     (package-delete-name package)))
 591
 592 (provide 'package-admin)
 593
 594 ;;; package-admin.el ends here