Mercurial > hg > xemacs-beta
annotate lisp/loadhist.el @ 4547:ab9e8f0fb295
Check absolute source file names against DOC with #'file-newer-than-file-p.
2008-12-30 Aidan Kehoe <kehoea@parhasard.net>
* make-docfile.el:
Use absolute source file names when checking if DOC is out of
date, don't use relative paths that may not be related to the
current directory.
| author | Aidan Kehoe <kehoea@parhasard.net> |
|---|---|
| date | Tue, 30 Dec 2008 16:09:59 +0000 |
| parents | 7e01763ea656 |
| children | e29fcfd8df5f |
| rev | line source |
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| 428 | 1 ;;; loadhist.el --- lisp functions for working with feature groups |
| 2 | |
| 3 ;; Copyright (C) 1995 Free Software Foundation, Inc. | |
| 4 | |
| 5 ;; Author: Eric S. Raymond <esr@snark.thyrsus.com> | |
| 6 ;; Version: 1.0 | |
| 7 ;; Keywords: internal, dumped | |
| 8 | |
| 9 ;; This file is part of XEmacs. | |
| 10 | |
| 11 ;; XEmacs is free software; you can redistribute it and/or modify it | |
| 12 ;; under the terms of the GNU General Public License as published by | |
| 13 ;; the Free Software Foundation; either version 2, or (at your option) | |
| 14 ;; any later version. | |
| 15 | |
| 16 ;; XEmacs is distributed in the hope that it will be useful, but | |
| 17 ;; WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 19 ;; General Public License for more details. | |
| 20 | |
| 21 ;; You should have received a copy of the GNU General Public License | |
| 22 ;; along with XEmacs; see the file COPYING. If not, write to the Free | |
| 23 ;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
| 24 ;; 02111-1307, USA. | |
| 25 | |
| 26 ;;; Synched up with: FSF 20.2. | |
| 27 | |
|
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28 ;; #### Sync this file! |
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29 |
| 428 | 30 ;;; Commentary: |
| 31 | |
| 32 ;; This file is dumped with XEmacs. | |
| 33 | |
| 34 ;; These functions exploit the load-history system variable. | |
| 35 ;; Entry points include `unload-feature', `symbol-file', and `feature-file'. | |
| 36 | |
| 37 ;;; Code: | |
| 38 | |
| 39 ;; load-history is a list of entries that look like this: | |
| 40 ;; ("outline" outline-regexp ... (require . wid-edit) ... (provide . outline) ...) | |
| 41 | |
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42 ;; XEmacs; this function is in subr.el in GNU, and does not deal with |
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43 ;; built-in symbols. |
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44 (defun* symbol-file (sym &optional type) |
| 428 | 45 "Return the input source from which SYM was loaded. |
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46 This is a file name, or nil if the source was a buffer with no associated file. |
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47 |
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48 If TYPE is nil or omitted, any kind of definition is acceptable. |
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49 If TYPE is `defun', then function, subr, special form or macro definitions |
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50 are acceptable. |
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51 If TYPE is `defvar', then variable definitions are acceptable. |
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52 |
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53 `defface' specifies a face definition only, and for the moment, it won't |
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54 return faces created with `make-face' or `copy-face', just those created |
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55 with `defface' and `custom-declare-face'." |
| 428 | 56 (interactive "SFind source file for symbol: ") ; XEmacs |
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57 (let (built-in-file autoload-cons symbol-details) |
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58 (cond ((and (eq 'autoload |
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59 (car-safe |
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60 (setq autoload-cons |
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61 (and (fboundp sym) (symbol-function sym))))) |
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62 (or (and (or (null type) (eq 'defvar type)) |
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63 (eq (fifth autoload-cons) 'keymap)) |
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64 (and (or (null type) (eq 'defun type)) |
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65 (memq (fifth autoload-cons) '(nil macro))))) |
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66 (return-from symbol-file (locate-library (second autoload-cons)))) |
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67 ((eq 'defvar type) |
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68 ;; Load history entries corresponding to variables are just |
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69 ;; symbols. |
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70 (dolist (entry load-history) |
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71 (when (memq sym (cdr entry)) |
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72 (return-from symbol-file (car entry))))) |
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73 ((not (null type)) |
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74 ;; Non-variables have the type stored as the car of the entry. |
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75 (dolist (entry load-history) |
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76 (when (and (setq symbol-details (rassq sym (cdr entry))) |
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77 (eq type (car symbol-details))) |
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78 (return-from symbol-file (car entry))))) |
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79 (t |
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80 ;; If TYPE hasn't been specified, we need to check both for |
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81 ;; variables and other symbols. |
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82 (dolist (entry load-history) |
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83 (when (or (memq sym (cdr entry)) |
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84 (rassq sym (cdr entry))) |
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85 (return-from symbol-file (car entry)))))) |
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86 (when (setq built-in-file (built-in-symbol-file sym type)) |
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87 (if (equal built-in-file (file-truename built-in-file)) |
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88 ;; Probably a full path name: |
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89 built-in-file |
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90 ;; This is a bit heuristic, but shouldn't realistically be a |
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91 ;; problem: |
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92 (if (string-match "\.elc?$" built-in-file) |
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93 (concat lisp-directory built-in-file) |
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94 (concat source-directory "/src/" built-in-file)))))) |
| 428 | 95 |
| 96 (defun feature-symbols (feature) | |
| 97 "Return the file and list of symbols associated with a given FEATURE." | |
| 98 (let ((pair `(provide . ,feature))) | |
| 99 (dolist (entry load-history) | |
| 100 (when (member pair (cdr entry)) | |
| 101 (return entry))))) | |
| 102 | |
| 103 (defun feature-file (feature) | |
| 104 "Return the file name from which a given FEATURE was loaded. | |
| 105 Actually, return the load argument, if any; this is sometimes the name of a | |
| 106 Lisp file without an extension. If the feature came from an eval-buffer on | |
| 107 a buffer with no associated file, or an eval-region, return nil." | |
| 108 (unless (featurep feature) | |
| 109 (error "%s is not a currently loaded feature" (symbol-name feature))) | |
| 110 (car (feature-symbols feature))) | |
| 111 | |
| 112 (defun file-symbols (file) | |
| 113 "Return the file and list of symbols associated with FILE. | |
| 114 The file name in the returned list is the string used to load the file, | |
| 115 and may not be the same string as FILE, but it will be equivalent." | |
| 116 (or (assoc file load-history) | |
| 117 (assoc (file-name-sans-extension file) load-history) | |
| 118 (assoc (concat file ".el") load-history) | |
| 119 (assoc (concat file ".elc") load-history))) | |
| 120 | |
| 121 (defun file-provides (file) | |
| 122 "Return the list of features provided by FILE." | |
| 123 (let ((provides nil)) | |
| 124 (dolist (x (cdr (file-symbols file))) | |
| 125 (when (eq (car-safe x) 'provide) | |
| 126 (push (cdr x) provides))) | |
| 127 provides)) | |
| 128 | |
| 129 (defun file-requires (file) | |
| 130 "Return the list of features required by FILE." | |
| 131 (let ((requires nil)) | |
| 132 (dolist (x (cdr (file-symbols file))) | |
| 133 (when (eq (car-safe x) 'require) | |
| 134 (push (cdr x) requires))) | |
| 135 requires)) | |
| 136 | |
| 137 (defun file-dependents (file) | |
| 138 "Return the list of loaded libraries that depend on FILE. | |
| 139 This can include FILE itself." | |
| 140 (let ((provides (file-provides file)) | |
| 141 (dependents nil)) | |
| 142 (dolist (entry load-history) | |
| 143 (dolist (x (cdr entry)) | |
| 144 (when (and (eq (car-safe x) 'require) | |
| 145 (memq (cdr-safe x) provides)) | |
| 146 (push (car entry) dependents)))) | |
| 147 dependents)) | |
| 148 | |
| 149 ;; FSFmacs | |
| 150 ;(defun read-feature (prompt) | |
| 151 ; "Read a feature name \(string\) from the minibuffer, | |
| 152 ;prompting with PROMPT and completing from `features', and | |
| 153 ;return the feature \(symbol\)." | |
| 154 ; (intern (completing-read prompt | |
| 155 ; (mapcar #'(lambda (feature) | |
| 156 ; (list (symbol-name feature))) | |
| 157 ; features) | |
| 158 ; nil t))) | |
| 159 | |
| 160 ;; ;;;###autoload | |
| 161 (defun unload-feature (feature &optional force) | |
| 162 "Unload the library that provided FEATURE, restoring all its autoloads. | |
| 163 If the feature is required by any other loaded code, and optional FORCE | |
| 164 is nil, raise an error." | |
| 165 (interactive "SFeature: ") | |
| 166 (unless (featurep feature) | |
| 167 (error "%s is not a currently loaded feature" (symbol-name feature))) | |
| 168 (when (not force) | |
| 169 (let* ((file (feature-file feature)) | |
| 170 (dependents (delete file (copy-sequence (file-dependents file))))) | |
| 171 (when dependents | |
| 172 (error "Loaded libraries %s depend on %s" | |
| 173 (prin1-to-string dependents) file)))) | |
| 442 | 174 (let* ((flist (feature-symbols feature)) |
| 996 | 175 (file (car flist)) |
| 176 (unloading-module nil)) | |
| 442 | 177 (flet ((reset-aload (x) |
| 178 (let ((aload (get x 'autoload))) | |
| 179 (if aload (fset x (cons 'autoload aload)))))) | |
| 428 | 180 (mapcar |
| 181 #'(lambda (x) | |
| 182 (cond ((stringp x) nil) | |
| 183 ((consp x) | |
| 184 ;; Remove any feature names that this file provided. | |
| 185 (if (eq (car x) 'provide) | |
| 996 | 186 (setq features (delq (cdr x) features)) |
| 187 (if (eq (car x) 'module) | |
| 188 (setq unloading-module t)))) | |
| 442 | 189 ((and (boundp x) |
| 190 (fboundp x)) | |
| 191 (makunbound x) | |
| 192 (fmakunbound x) | |
| 193 (reset-aload x)) | |
| 194 ((boundp x) | |
| 195 (makunbound x)) | |
| 428 | 196 ((fboundp x) |
| 197 (fmakunbound x) | |
| 442 | 198 (reset-aload x)))) |
| 199 (cdr flist))) | |
| 428 | 200 ;; Delete the load-history element for this file. |
| 201 (let ((elt (assoc file load-history))) | |
| 996 | 202 (setq load-history (delq elt load-history))) |
| 203 ;; If it is a module, really unload it. | |
| 204 (if unloading-module | |
| 1111 | 205 (declare-fboundp (unload-module (symbol-name feature)))))) |
| 428 | 206 |
| 207 (provide 'loadhist) | |
| 208 | |
| 209 ;;; loadhist.el ends here |