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428
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1 ;;; files.el --- file input and output commands for XEmacs.
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2
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3 ;; Copyright (C) 1985-1987, 1992-1995, 1997 Free Software Foundation, Inc.
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4 ;; Copyright (C) 1995 Sun Microsystems.
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771
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5 ;; Copyright (C) 2001, 2002 Ben Wing.
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428
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6
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7 ;; Maintainer: XEmacs Development Team
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8 ;; Keywords: extensions, dumped
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9
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10 ;; This file is part of XEmacs.
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11
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12 ;; XEmacs is free software; you can redistribute it and/or modify it
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13 ;; under the terms of the GNU General Public License as published by
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14 ;; the Free Software Foundation; either version 2, or (at your option)
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15 ;; any later version.
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16
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17 ;; XEmacs is distributed in the hope that it will be useful, but
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18 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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20 ;; General Public License for more details.
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21
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22 ;; You should have received a copy of the GNU General Public License
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23 ;; along with XEmacs; see the file COPYING. If not, write to the Free
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24 ;; Software Foundation, Inc. 59 Temple Place - Suite 330, Boston, MA
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25 ;; 02111-1307, USA.
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26
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27 ;;; Synched up with: FSF 20.3 (but diverging)
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28 ;;; Warning: Merging this file is tough. Beware.
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29
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30 ;;; Commentary:
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31
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32 ;; This file is dumped with XEmacs.
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33
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34 ;; Defines most of XEmacs's file- and directory-handling functions,
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35 ;; including basic file visiting, backup generation, link handling,
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36 ;; ITS-id version control, load- and write-hook handling, and the like.
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37
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38 ;;; Code:
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39
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40 ;; XEmacs: Avoid compilation warnings.
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41 (defvar coding-system-for-read)
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42 (defvar buffer-file-coding-system)
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43
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44 (defgroup files nil
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45 "Support editing files."
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46 :group 'emacs)
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47
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48 (defgroup backup nil
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49 "Backups of edited data files."
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50 :group 'files)
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51
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52 (defgroup find-file nil
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53 "Finding and editing files."
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54 :group 'files)
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55
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56
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57 ;; XEmacs: In buffer.c
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58 ;(defconst delete-auto-save-files t
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59 ; "*Non-nil means delete auto-save file when a buffer is saved or killed.")
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60
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61 ;; FSF has automount-dir-prefix. Our directory-abbrev-alist is more general.
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62 ;; note: tmp_mnt bogosity conversion is established in paths.el.
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63 (defcustom directory-abbrev-alist nil
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64 "*Alist of abbreviations for file directories.
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65 A list of elements of the form (FROM . TO), each meaning to replace
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66 FROM with TO when it appears in a directory name.
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67 This replacement is done when setting up the default directory of a
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68 newly visited file. *Every* FROM string should start with \\\\` or ^.
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69
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70 Use this feature when you have directories which you normally refer to
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71 via absolute symbolic links or to eliminate automounter mount points
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72 from the beginning of your filenames. Make TO the name of the link,
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73 and FROM the name it is linked to."
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74 :type '(repeat (cons :format "%v"
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75 :value ("\\`" . "")
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76 (regexp :tag "From")
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77 (regexp :tag "To")))
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78 :group 'find-file)
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79
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80 (defcustom make-backup-files t
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81 "*Non-nil means make a backup of a file the first time it is saved.
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82 This can be done by renaming the file or by copying.
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83
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84 Renaming means that XEmacs renames the existing file so that it is a
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85 backup file, then writes the buffer into a new file. Any other names
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86 that the old file had will now refer to the backup file. The new file
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87 is owned by you and its group is defaulted.
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88
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89 Copying means that XEmacs copies the existing file into the backup
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90 file, then writes the buffer on top of the existing file. Any other
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91 names that the old file had will now refer to the new (edited) file.
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92 The file's owner and group are unchanged.
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93
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94 The choice of renaming or copying is controlled by the variables
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95 `backup-by-copying', `backup-by-copying-when-linked' and
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96 `backup-by-copying-when-mismatch'. See also `backup-inhibited'."
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97 :type 'boolean
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98 :group 'backup)
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99
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100 ;; Do this so that local variables based on the file name
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101 ;; are not overridden by the major mode.
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102 (defvar backup-inhibited nil
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103 "Non-nil means don't make a backup, regardless of the other parameters.
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104 This variable is intended for use by making it local to a buffer.
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105 But it is local only if you make it local.")
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106 (put 'backup-inhibited 'permanent-local t)
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107
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108 (defcustom backup-by-copying nil
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109 "*Non-nil means always use copying to create backup files.
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110 See documentation of variable `make-backup-files'."
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111 :type 'boolean
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112 :group 'backup)
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113
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114 (defcustom backup-by-copying-when-linked nil
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115 "*Non-nil means use copying to create backups for files with multiple names.
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116 This causes the alternate names to refer to the latest version as edited.
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117 This variable is relevant only if `backup-by-copying' is nil."
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118 :type 'boolean
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119 :group 'backup)
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120
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121 (defcustom backup-by-copying-when-mismatch nil
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122 "*Non-nil means create backups by copying if this preserves owner or group.
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123 Renaming may still be used (subject to control of other variables)
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124 when it would not result in changing the owner or group of the file;
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125 that is, for files which are owned by you and whose group matches
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126 the default for a new file created there by you.
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127 This variable is relevant only if `backup-by-copying' is nil."
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128 :type 'boolean
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129 :group 'backup)
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130
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131 (defvar backup-enable-predicate
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132 #'(lambda (name)
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133 (not (or (null name)
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134 (string-match "^/tmp/" name)
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135 (let ((tmpdir (temp-directory)))
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136 (and tmpdir
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137 (string-match (concat "\\`" (regexp-quote tmpdir) "/")
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138 tmpdir))))))
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139 "Predicate that looks at a file name and decides whether to make backups.
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140 Called with an absolute file name as argument, it returns t to enable backup.")
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141
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142 (defcustom buffer-offer-save nil
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143 "*Non-nil in a buffer means offer to save the buffer on exit
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144 even if the buffer is not visiting a file.
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145 Automatically local in all buffers."
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146 :type 'boolean
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147 :group 'find-file)
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148 (make-variable-buffer-local 'buffer-offer-save)
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149
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150 ;; FSF uses normal defconst
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151 (defvaralias 'find-file-visit-truename 'find-file-use-truenames)
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152 (defvaralias 'find-file-existing-other-name 'find-file-compare-truenames)
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153
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154 (defcustom revert-without-query nil
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155 "*Specify which files should be reverted without query.
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156 The value is a list of regular expressions.
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157 If the file name matches one of these regular expressions,
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158 then `revert-buffer' reverts the file without querying
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159 if the file has changed on disk and you have not edited the buffer."
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160 :type '(repeat (regexp ""))
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161 :group 'find-file)
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162
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163 (defvar buffer-file-number nil
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164 "The device number and file number of the file visited in the current buffer.
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165 The value is a list of the form (FILENUM DEVNUM).
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166 This pair of numbers uniquely identifies the file.
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167 If the buffer is visiting a new file, the value is nil.")
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168 (make-variable-buffer-local 'buffer-file-number)
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169 (put 'buffer-file-number 'permanent-local t)
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170
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171 (defvar buffer-file-numbers-unique (not (memq system-type '(windows-nt)))
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172 "Non-nil means that buffer-file-number uniquely identifies files.")
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173
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174 (defcustom file-precious-flag nil
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175 "*Non-nil means protect against I/O errors while saving files.
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176 Some modes set this non-nil in particular buffers.
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177
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178 This feature works by writing the new contents into a temporary file
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179 and then renaming the temporary file to replace the original.
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180 In this way, any I/O error in writing leaves the original untouched,
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181 and there is never any instant where the file is nonexistent.
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182
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183 Note that this feature forces backups to be made by copying.
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184 Yet, at the same time, saving a precious file
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185 breaks any hard links between it and other files."
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186 :type 'boolean
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187 :group 'backup)
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188
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189 (defcustom version-control nil
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190 "*Control use of version numbers for backup files.
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191 t means make numeric backup versions unconditionally.
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192 nil means make them for files that have some already.
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193 `never' means do not make them."
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194 :type 'boolean
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195 :group 'backup
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196 :group 'vc)
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197
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198 ;; This is now defined in efs.
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199 ;(defvar dired-kept-versions 2
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200 ; "*When cleaning directory, number of versions to keep.")
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201
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202 (defcustom delete-old-versions nil
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203 "*If t, delete excess backup versions silently.
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204 If nil, ask confirmation. Any other value prevents any trimming."
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205 :type '(choice (const :tag "Delete" t)
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206 (const :tag "Ask" nil)
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207 (sexp :tag "Leave" :format "%t\n" other))
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208 :group 'backup)
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209
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210 (defcustom kept-old-versions 2
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211 "*Number of oldest versions to keep when a new numbered backup is made."
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212 :type 'integer
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213 :group 'backup)
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214
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215 (defcustom kept-new-versions 2
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216 "*Number of newest versions to keep when a new numbered backup is made.
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217 Includes the new backup. Must be > 0"
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218 :type 'integer
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219 :group 'backup)
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220
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221 (defcustom require-final-newline nil
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222 "*Value of t says silently ensure a file ends in a newline when it is saved.
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223 Non-nil but not t says ask user whether to add a newline when there isn't one.
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224 nil means don't add newlines."
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225 :type '(choice (const :tag "Off" nil)
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226 (const :tag "Add" t)
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227 (sexp :tag "Ask" :format "%t\n" ask))
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228 :group 'editing-basics)
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229
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230 (defcustom auto-save-default t
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231 "*Non-nil says by default do auto-saving of every file-visiting buffer."
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232 :type 'boolean
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233 :group 'auto-save)
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234
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235 (defcustom auto-save-visited-file-name nil
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236 "*Non-nil says auto-save a buffer in the file it is visiting, when practical.
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237 Normally auto-save files are written under other names."
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238 :type 'boolean
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239 :group 'auto-save)
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240
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241 (defcustom save-abbrevs nil
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242 "*Non-nil means save word abbrevs too when files are saved.
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243 Loading an abbrev file sets this to t."
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244 :type 'boolean
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245 :group 'abbrev)
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246
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247 (defcustom find-file-run-dired t
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248 "*Non-nil says run dired if `find-file' is given the name of a directory."
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249 :type 'boolean
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250 :group 'find-file)
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251
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252 ;;;It is not useful to make this a local variable.
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253 ;;;(put 'find-file-not-found-hooks 'permanent-local t)
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254 (defvar find-file-not-found-hooks nil
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255 "List of functions to be called for `find-file' on nonexistent file.
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256 These functions are called as soon as the error is detected.
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257 `buffer-file-name' is already set up.
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258 The functions are called in the order given until one of them returns non-nil.")
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259
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260 ;;;It is not useful to make this a local variable.
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261 ;;;(put 'find-file-hooks 'permanent-local t)
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262 (defvar find-file-hooks nil
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263 "List of functions to be called after a buffer is loaded from a file.
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264 The buffer's local variables (if any) will have been processed before the
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265 functions are called.")
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266
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267 (defvar write-file-hooks nil
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268 "List of functions to be called before writing out a buffer to a file.
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269 If one of them returns non-nil, the file is considered already written
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270 and the rest are not called.
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271 These hooks are considered to pertain to the visited file.
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272 So this list is cleared if you change the visited file name.
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273 See also `write-contents-hooks' and `continue-save-buffer'.")
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274 ;;; However, in case someone does make it local...
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275 (put 'write-file-hooks 'permanent-local t)
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276
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277 (defvar local-write-file-hooks nil
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278 "Just like `write-file-hooks', except intended for per-buffer use.
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279 The functions in this list are called before the ones in
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280 `write-file-hooks'.
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281
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282 This variable is meant to be used for hooks that have to do with a
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283 particular visited file. Therefore, it is a permanent local, so that
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284 changing the major mode does not clear it. However, calling
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285 `set-visited-file-name' does clear it.")
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286 (make-variable-buffer-local 'local-write-file-hooks)
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287 (put 'local-write-file-hooks 'permanent-local t)
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288
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289
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290 ;; #### think about this (added by Sun).
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291 (put 'after-set-visited-file-name-hooks 'permanent-local t)
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292 (defvar after-set-visited-file-name-hooks nil
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293 "List of functions to be called after \\[set-visited-file-name]
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294 or during \\[write-file].
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444
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295 You can use this hook to restore local values of `write-file-hooks',
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296 `after-save-hook', and `revert-buffer-function', which pertain
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297 to a specific file and therefore are normally killed by a rename.
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444
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298 Put hooks pertaining to the buffer contents on `write-contents-hooks'
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299 and `revert-buffer-insert-file-contents-function'.")
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428
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300
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301 (defvar write-contents-hooks nil
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302 "List of functions to be called before writing out a buffer to a file.
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303 If one of them returns non-nil, the file is considered already written
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304 and the rest are not called.
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305 These hooks are considered to pertain to the buffer's contents,
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306 not to the particular visited file; thus, `set-visited-file-name' does
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307 not clear this variable, but changing the major mode does clear it.
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308 See also `write-file-hooks' and `continue-save-buffer'.")
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309
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310 ;; XEmacs addition
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311 ;; Energize needed this to hook into save-buffer at a lower level; we need
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312 ;; to provide a new output method, but don't want to have to duplicate all
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313 ;; of the backup file and file modes logic.that does not occur if one uses
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314 ;; a write-file-hook which returns non-nil.
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315 (put 'write-file-data-hooks 'permanent-local t)
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316 (defvar write-file-data-hooks nil
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317 "List of functions to be called to put the bytes on disk.
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318 These functions receive the name of the file to write to as argument.
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319 The default behavior is to call
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320 (write-region (point-min) (point-max) filename nil t)
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321 If one of them returns non-nil, the file is considered already written
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322 and the rest are not called.
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323 These hooks are considered to pertain to the visited file.
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324 So this list is cleared if you change the visited file name.
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325 See also `write-file-hooks'.")
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326
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327 (defcustom enable-local-variables t
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328 "*Control use of local-variables lists in files you visit.
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329 The value can be t, nil or something else.
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330 A value of t means local-variables lists are obeyed;
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331 nil means they are ignored; anything else means query.
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332
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333 The command \\[normal-mode] always obeys local-variables lists
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334 and ignores this variable."
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335 :type '(choice (const :tag "Obey" t)
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336 (const :tag "Ignore" nil)
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337 (sexp :tag "Query" :format "%t\n" other))
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338 :group 'find-file)
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339
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340 (defcustom enable-local-eval 'maybe
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341 "*Control processing of the \"variable\" `eval' in a file's local variables.
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342 The value can be t, nil or something else.
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343 A value of t means obey `eval' variables;
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344 nil means ignore them; anything else means query.
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345
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346 The command \\[normal-mode] always obeys local-variables lists
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347 and ignores this variable."
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348 :type '(choice (const :tag "Obey" t)
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349 (const :tag "Ignore" nil)
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350 (sexp :tag "Query" :format "%t\n" other))
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351 :group 'find-file)
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352
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353 ;; Avoid losing in versions where CLASH_DETECTION is disabled.
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354 (or (fboundp 'lock-buffer)
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355 (defalias 'lock-buffer 'ignore))
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356 (or (fboundp 'unlock-buffer)
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357 (defalias 'unlock-buffer 'ignore))
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358
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359 ;;FSFmacs bastardized ange-ftp cruft
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360 ;; This hook function provides support for ange-ftp host name
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361 ;; completion. It runs the usual ange-ftp hook, but only for
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362 ;; completion operations. Having this here avoids the need
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363 ;; to load ange-ftp when it's not really in use.
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364 ;(defun ange-ftp-completion-hook-function (op &rest args)
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365 ; (if (memq op '(file-name-completion file-name-all-completions))
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366 ; (apply 'ange-ftp-hook-function op args)
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367 ; (let ((inhibit-file-name-handlers
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368 ; (cons 'ange-ftp-completion-hook-function
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369 ; (and (eq inhibit-file-name-operation op)
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370 ; inhibit-file-name-handlers)))
|
|
|
371 ; (inhibit-file-name-operation op))
|
|
|
372 ; (apply op args))
|
|
|
373
|
|
|
374 (defun convert-standard-filename (filename)
|
|
464
|
375 "Convert a standard file's name to something suitable for the current OS."
|
|
|
376 (if (eq system-type 'windows-nt)
|
|
|
377 (let ((name (copy-sequence filename))
|
|
|
378 (start 0))
|
|
|
379 ;; leave ':' if part of drive specifier
|
|
|
380 (if (eq (aref name 1) ?:)
|
|
|
381 (setq start 2))
|
|
|
382 ;; destructively replace invalid filename characters with !
|
|
|
383 (while (string-match "[?*:<>|\"\000-\037]" name start)
|
|
|
384 (aset name (match-beginning 0) ?!)
|
|
|
385 (setq start (match-end 0)))
|
|
|
386 ;; FSF: [convert directory separators to Windows format ...]
|
|
|
387 ;; unneeded in XEmacs.
|
|
|
388 name)
|
|
|
389 filename))
|
|
|
390
|
|
428
|
391
|
|
|
392 (defun pwd ()
|
|
|
393 "Show the current default directory."
|
|
|
394 (interactive nil)
|
|
|
395 (message "Directory %s" default-directory))
|
|
|
396
|
|
|
397 (defvar cd-path nil
|
|
|
398 "Value of the CDPATH environment variable, as a list.
|
|
|
399 Not actually set up until the first time you use it.")
|
|
|
400
|
|
|
401 (defvar cdpath-previous nil
|
|
|
402 "Prior value of the CDPATH environment variable.")
|
|
|
403
|
|
|
404 (defun parse-colon-path (cd-path)
|
|
|
405 "Explode a colon-separated search path into a list of directory names.
|
|
|
406
|
|
|
407 If you think you want to use this, you probably don't. This function
|
|
|
408 is provided for backward compatibility. A more robust implementation
|
|
|
409 of the same functionality is available as `split-path', which see."
|
|
|
410 (and cd-path
|
|
|
411 (let (cd-list (cd-start 0) cd-colon)
|
|
|
412 (setq cd-path (concat cd-path path-separator))
|
|
|
413 (while (setq cd-colon (string-match path-separator cd-path cd-start))
|
|
|
414 (setq cd-list
|
|
|
415 (nconc cd-list
|
|
|
416 (list (if (= cd-start cd-colon)
|
|
|
417 nil
|
|
|
418 (substitute-in-file-name
|
|
|
419 (file-name-as-directory
|
|
|
420 (substring cd-path cd-start cd-colon)))))))
|
|
|
421 (setq cd-start (+ cd-colon 1)))
|
|
|
422 cd-list)))
|
|
|
423
|
|
|
424 (defun cd-absolute (dir)
|
|
|
425 "Change current directory to given absolute file name DIR."
|
|
|
426 ;; Put the name into directory syntax now,
|
|
|
427 ;; because otherwise expand-file-name may give some bad results.
|
|
|
428 (setq dir (file-name-as-directory dir))
|
|
|
429 ;; XEmacs change: stig@hackvan.com
|
|
|
430 (if find-file-use-truenames
|
|
|
431 (setq dir (file-truename dir)))
|
|
|
432 (setq dir (abbreviate-file-name (expand-file-name dir)))
|
|
|
433 (cond ((not (file-directory-p dir))
|
|
|
434 (error "%s is not a directory" dir))
|
|
|
435 ;; this breaks ange-ftp, which doesn't (can't?) overload `file-executable-p'.
|
|
|
436 ;;((not (file-executable-p dir))
|
|
|
437 ;; (error "Cannot cd to %s: Permission denied" dir))
|
|
|
438 (t
|
|
|
439 (setq default-directory dir))))
|
|
|
440
|
|
|
441 (defun cd (dir)
|
|
|
442 "Make DIR become the current buffer's default directory.
|
|
|
443 If your environment includes a `CDPATH' variable, try each one of that
|
|
|
444 colon-separated list of directories when resolving a relative directory name."
|
|
|
445 (interactive
|
|
|
446 ;; XEmacs change? (read-file-name => read-directory-name)
|
|
|
447 (list (read-directory-name "Change default directory: "
|
|
|
448 default-directory default-directory
|
|
|
449 (and (member cd-path '(nil ("./")))
|
|
|
450 (null (getenv "CDPATH"))))))
|
|
|
451 (if (file-name-absolute-p dir)
|
|
|
452 (cd-absolute (expand-file-name dir))
|
|
|
453 ;; XEmacs
|
|
|
454 (unless (and cd-path (equal (getenv "CDPATH") cdpath-previous))
|
|
|
455 ;;#### Unix-specific
|
|
|
456 (let ((trypath (parse-colon-path
|
|
|
457 (setq cdpath-previous (getenv "CDPATH")))))
|
|
|
458 (setq cd-path (or trypath (list "./")))))
|
|
|
459 (or (catch 'found
|
|
|
460 (mapcar #'(lambda (x)
|
|
|
461 (let ((f (expand-file-name (concat x dir))))
|
|
|
462 (if (file-directory-p f)
|
|
|
463 (progn
|
|
|
464 (cd-absolute f)
|
|
|
465 (throw 'found t)))))
|
|
|
466 cd-path)
|
|
|
467 nil)
|
|
|
468 ;; jwz: give a better error message to those of us with the
|
|
|
469 ;; good taste not to use a kludge like $CDPATH.
|
|
|
470 (if (equal cd-path '("./"))
|
|
|
471 (error "No such directory: %s" (expand-file-name dir))
|
|
|
472 (error "Directory not found in $CDPATH: %s" dir)))))
|
|
|
473
|
|
|
474 (defun load-file (file)
|
|
|
475 "Load the Lisp file named FILE."
|
|
|
476 (interactive "fLoad file: ")
|
|
|
477 (load (expand-file-name file) nil nil t))
|
|
|
478
|
|
|
479 ; We now dump utils/lib-complete.el which has improved versions of this.
|
|
|
480 ;(defun load-library (library)
|
|
|
481 ; "Load the library named LIBRARY.
|
|
|
482 ;This is an interface to the function `load'."
|
|
|
483 ; (interactive "sLoad library: ")
|
|
|
484 ; (load library))
|
|
|
485 ;
|
|
|
486 ;(defun find-library (library)
|
|
|
487 ; "Find the library of Lisp code named LIBRARY.
|
|
|
488 ;This searches `load-path' for a file named either \"LIBRARY\" or \"LIBRARY.el\"."
|
|
|
489 ; (interactive "sFind library file: ")
|
|
|
490 ; (let ((f (locate-file library load-path ":.el:")))
|
|
|
491 ; (if f
|
|
|
492 ; (find-file f)
|
|
|
493 ; (error "Couldn't locate library %s" library))))
|
|
|
494
|
|
|
495 (defun file-local-copy (file &optional buffer)
|
|
|
496 "Copy the file FILE into a temporary file on this machine.
|
|
|
497 Returns the name of the local copy, or nil, if FILE is directly
|
|
|
498 accessible."
|
|
|
499 (let ((handler (find-file-name-handler file 'file-local-copy)))
|
|
|
500 (if handler
|
|
|
501 (funcall handler 'file-local-copy file)
|
|
|
502 nil)))
|
|
|
503
|
|
|
504 ;; XEmacs change block
|
|
|
505 ; We have this in C and use the realpath() system call.
|
|
|
506
|
|
|
507 ;(defun file-truename (filename &optional counter prev-dirs)
|
|
|
508 ; [... lots of code snipped ...]
|
|
|
509 ; filename))
|
|
|
510
|
|
|
511 ;; XEmacs addition. Called from `insert-file-contents-internal'
|
|
|
512 ;; at the appropriate time.
|
|
|
513 (defun compute-buffer-file-truename (&optional buffer)
|
|
|
514 "Recompute BUFFER's value of `buffer-file-truename'
|
|
|
515 based on the current value of `buffer-file-name'.
|
|
|
516 BUFFER defaults to the current buffer if unspecified."
|
|
|
517 (save-excursion
|
|
|
518 (set-buffer (or buffer (current-buffer)))
|
|
|
519 (cond ((null buffer-file-name)
|
|
|
520 (setq buffer-file-truename nil))
|
|
|
521 ((setq buffer-file-truename (file-truename buffer-file-name))
|
|
|
522 ;; it exists, we're done.
|
|
|
523 nil)
|
|
|
524 (t
|
|
|
525 ;; the file doesn't exist, but maybe the directory does.
|
|
|
526 (let* ((dir (file-name-directory buffer-file-name))
|
|
|
527 (truedir (file-truename dir)))
|
|
|
528 (if truedir (setq dir truedir))
|
|
|
529 (setq buffer-file-truename
|
|
|
530 (expand-file-name (file-name-nondirectory buffer-file-name)
|
|
|
531 dir)))))
|
|
|
532 (if (and find-file-use-truenames buffer-file-truename)
|
|
|
533 (setq buffer-file-name (abbreviate-file-name buffer-file-truename)
|
|
|
534 default-directory (file-name-directory buffer-file-name)))
|
|
|
535 buffer-file-truename))
|
|
|
536 ;; End XEmacs change block
|
|
|
537
|
|
|
538 (defun file-chase-links (filename)
|
|
|
539 "Chase links in FILENAME until a name that is not a link.
|
|
|
540 Does not examine containing directories for links,
|
|
|
541 unlike `file-truename'."
|
|
|
542 (let (tem (count 100) (newname filename))
|
|
|
543 (while (setq tem (file-symlink-p newname))
|
|
|
544 (save-match-data
|
|
|
545 (if (= count 0)
|
|
|
546 (error "Apparent cycle of symbolic links for %s" filename))
|
|
|
547 ;; In the context of a link, `//' doesn't mean what XEmacs thinks.
|
|
|
548 (while (string-match "//+" tem)
|
|
|
549 (setq tem (concat (substring tem 0 (1+ (match-beginning 0)))
|
|
|
550 (substring tem (match-end 0)))))
|
|
|
551 ;; Handle `..' by hand, since it needs to work in the
|
|
|
552 ;; target of any directory symlink.
|
|
|
553 ;; This code is not quite complete; it does not handle
|
|
|
554 ;; embedded .. in some cases such as ./../foo and foo/bar/../../../lose.
|
|
|
555 (while (string-match "\\`\\.\\./" tem) ;#### Unix specific
|
|
|
556 (setq tem (substring tem 3))
|
|
|
557 (setq newname (file-name-as-directory
|
|
|
558 ;; Do the .. by hand.
|
|
|
559 (directory-file-name
|
|
|
560 (file-name-directory
|
|
|
561 ;; Chase links in the default dir of the symlink.
|
|
|
562 (file-chase-links
|
|
|
563 (directory-file-name
|
|
|
564 (file-name-directory newname))))))))
|
|
|
565 (setq newname (expand-file-name tem (file-name-directory newname)))
|
|
|
566 (setq count (1- count))))
|
|
|
567 newname))
|
|
|
568
|
|
|
569 (defun switch-to-other-buffer (arg)
|
|
|
570 "Switch to the previous buffer. With a numeric arg, n, switch to the nth
|
|
|
571 most recent buffer. With an arg of 0, buries the current buffer at the
|
|
|
572 bottom of the buffer stack."
|
|
|
573 (interactive "p")
|
|
|
574 (if (eq arg 0)
|
|
|
575 (bury-buffer (current-buffer)))
|
|
|
576 (switch-to-buffer
|
|
|
577 (if (<= arg 1) (other-buffer (current-buffer))
|
|
|
578 (nth (1+ arg) (buffer-list)))))
|
|
|
579
|
|
|
580 (defun switch-to-buffer-other-window (buffer)
|
|
|
581 "Select buffer BUFFER in another window."
|
|
|
582 (interactive "BSwitch to buffer in other window: ")
|
|
|
583 (let ((pop-up-windows t))
|
|
|
584 ;; XEmacs: this used to have (selected-frame) as the third argument,
|
|
|
585 ;; but this is obnoxious. If the user wants the buffer in a
|
|
|
586 ;; different frame, then it should be this way.
|
|
|
587
|
|
|
588 ;; Change documented above undone --mrb
|
|
|
589 (pop-to-buffer buffer t (selected-frame))))
|
|
|
590
|
|
|
591 (defun switch-to-buffer-other-frame (buffer)
|
|
|
592 "Switch to buffer BUFFER in a newly-created frame."
|
|
|
593 (interactive "BSwitch to buffer in other frame: ")
|
|
|
594 (let* ((name (get-frame-name-for-buffer buffer))
|
|
|
595 (frame (make-frame (if name
|
|
|
596 (list (cons 'name (symbol-name name)))))))
|
|
|
597 (pop-to-buffer buffer t frame)
|
|
|
598 (make-frame-visible frame)
|
|
|
599 buffer))
|
|
|
600
|
|
771
|
601 (defun switch-to-next-buffer (&optional n)
|
|
|
602 "Switch to the next-most-recent buffer.
|
|
|
603 This essentially rotates the buffer list forward.
|
|
|
604 N (interactively, the prefix arg) specifies how many times to rotate
|
|
|
605 forward, and defaults to 1. Buffers whose name begins with a space
|
|
|
606 \(i.e. \"invisible\" buffers) are ignored."
|
|
|
607 ;; Here is a different interactive spec. Look up the function
|
|
|
608 ;; `interactive' (i.e. `C-h f interactive') to understand how this
|
|
|
609 ;; all works.
|
|
|
610 (interactive "p")
|
|
|
611 (dotimes (n (or n 1))
|
|
|
612 (loop
|
|
|
613 do (bury-buffer (car (buffer-list)))
|
|
|
614 while (funcall buffers-tab-omit-function (car (buffer-list))))
|
|
|
615 (switch-to-buffer (car (buffer-list)))))
|
|
|
616
|
|
|
617 (defun switch-to-previous-buffer (&optional n)
|
|
|
618 "Switch to the previously most-recent buffer.
|
|
|
619 This essentially rotates the buffer list backward.
|
|
|
620 N (interactively, the prefix arg) specifies how many times to rotate
|
|
|
621 backward, and defaults to 1. Buffers whose name begins with a space
|
|
|
622 \(i.e. \"invisible\" buffers) are ignored."
|
|
|
623 (interactive "p")
|
|
|
624 (dotimes (n (or n 1))
|
|
|
625 (loop
|
|
|
626 do (switch-to-buffer (car (last (buffer-list))))
|
|
|
627 while (funcall buffers-tab-omit-function (car (buffer-list))))))
|
|
|
628
|
|
|
629 (defun switch-to-next-buffer-in-group (&optional n)
|
|
|
630 "Switch to the next-most-recent buffer in the current group.
|
|
|
631 This essentially rotates the buffer list forward.
|
|
|
632 N (interactively, the prefix arg) specifies how many times to rotate
|
|
|
633 forward, and defaults to 1. Buffers whose name begins with a space
|
|
|
634 \(i.e. \"invisible\" buffers) are ignored."
|
|
|
635 (interactive "p")
|
|
|
636 (dotimes (n (or n 1))
|
|
|
637 (let ((curbuf (car (buffer-list))))
|
|
|
638 (loop
|
|
|
639 do (bury-buffer (car (buffer-list)))
|
|
|
640 while (or (funcall buffers-tab-omit-function (car (buffer-list)))
|
|
|
641 (not (funcall buffers-tab-selection-function
|
|
|
642 curbuf (car (buffer-list)))))))
|
|
|
643 (switch-to-buffer (car (buffer-list)))))
|
|
|
644
|
|
|
645 (defun switch-to-previous-buffer-in-group (&optional n)
|
|
|
646 "Switch to the previously most-recent buffer in the current group.
|
|
|
647 This essentially rotates the buffer list backward.
|
|
|
648 N (interactively, the prefix arg) specifies how many times to rotate
|
|
|
649 backward, and defaults to 1. Buffers whose name begins with a space
|
|
|
650 \(i.e. \"invisible\" buffers) are ignored."
|
|
|
651 (interactive "p")
|
|
|
652 (dotimes (n (or n 1))
|
|
|
653 (let ((curbuf (car (buffer-list))))
|
|
|
654 (loop
|
|
|
655 do (switch-to-buffer (car (last (buffer-list))))
|
|
|
656 while (or (funcall buffers-tab-omit-function (car (buffer-list)))
|
|
|
657 (not (funcall buffers-tab-selection-function
|
|
|
658 curbuf (car (buffer-list)))))))))
|
|
|
659
|
|
428
|
660 (defun find-file (filename &optional codesys)
|
|
|
661 "Edit file FILENAME.
|
|
771
|
662 Switch to a buffer visiting file FILENAME, creating one if none already
|
|
|
663 exists. Optional second argument specifies the coding system to use when
|
|
|
664 decoding the file. Interactively, with a prefix argument, you will be
|
|
|
665 prompted for the coding system.
|
|
|
666
|
|
|
667 If you do not explicitly specify a coding system, the coding system
|
|
|
668 is determined as follows:
|
|
|
669
|
|
|
670 1. `coding-system-for-read', if non-nil. (This is used by Lisp programs to
|
|
|
671 temporarily set an overriding coding system and should almost never
|
|
|
672 apply here in `find-file'.)
|
|
|
673 2. The result of `insert-file-contents-pre-hook', if non-nil. (This is a
|
|
|
674 complex interface for handling special cases.)
|
|
|
675 3. The matching value for this filename from `file-coding-system-alist',
|
|
|
676 if any. (This lets you specify the coding system to be used for
|
|
|
677 files with particular extensions, names, etc.)
|
|
|
678 4. `buffer-file-coding-system-for-read', if non-nil. (This is the global
|
|
|
679 default -- normally `undecided', so the built-in auto-detection
|
|
|
680 mechanism can do its thing.)
|
|
|
681 5. The coding system 'raw-text.
|
|
|
682
|
|
|
683 See `insert-file-contents' for more details about how the process of
|
|
|
684 determining the coding system works."
|
|
428
|
685 (interactive "FFind file: \nZCoding system: ")
|
|
|
686 (if codesys
|
|
|
687 (let ((coding-system-for-read
|
|
|
688 (get-coding-system codesys)))
|
|
|
689 (switch-to-buffer (find-file-noselect filename)))
|
|
|
690 (switch-to-buffer (find-file-noselect filename))))
|
|
|
691
|
|
|
692 (defun find-file-other-window (filename &optional codesys)
|
|
|
693 "Edit file FILENAME, in another window.
|
|
771
|
694 May create a new window, or reuse an existing one. See the function
|
|
|
695 `display-buffer'. Optional second argument specifies the coding system to
|
|
|
696 use when decoding the file. Interactively, with a prefix argument, you
|
|
|
697 will be prompted for the coding system."
|
|
428
|
698 (interactive "FFind file in other window: \nZCoding system: ")
|
|
|
699 (if codesys
|
|
|
700 (let ((coding-system-for-read
|
|
|
701 (get-coding-system codesys)))
|
|
|
702 (switch-to-buffer-other-window (find-file-noselect filename)))
|
|
|
703 (switch-to-buffer-other-window (find-file-noselect filename))))
|
|
|
704
|
|
|
705 (defun find-file-other-frame (filename &optional codesys)
|
|
|
706 "Edit file FILENAME, in a newly-created frame.
|
|
771
|
707 Optional second argument specifies the coding system to use when decoding
|
|
|
708 the file. Interactively, with a prefix argument, you will be prompted for
|
|
|
709 the coding system."
|
|
428
|
710 (interactive "FFind file in other frame: \nZCoding system: ")
|
|
|
711 (if codesys
|
|
|
712 (let ((coding-system-for-read
|
|
|
713 (get-coding-system codesys)))
|
|
|
714 (switch-to-buffer-other-frame (find-file-noselect filename)))
|
|
|
715 (switch-to-buffer-other-frame (find-file-noselect filename))))
|
|
|
716
|
|
|
717 (defun find-file-read-only (filename &optional codesys)
|
|
|
718 "Edit file FILENAME but don't allow changes.
|
|
|
719 Like \\[find-file] but marks buffer as read-only.
|
|
|
720 Use \\[toggle-read-only] to permit editing.
|
|
771
|
721 Optional second argument specifies the coding system to use when decoding
|
|
|
722 the file. Interactively, with a prefix argument, you will be prompted for
|
|
|
723 the coding system."
|
|
428
|
724 (interactive "fFind file read-only: \nZCoding system: ")
|
|
|
725 (if codesys
|
|
|
726 (let ((coding-system-for-read
|
|
|
727 (get-coding-system codesys)))
|
|
|
728 (find-file filename))
|
|
|
729 (find-file filename))
|
|
|
730 (setq buffer-read-only t)
|
|
|
731 (current-buffer))
|
|
|
732
|
|
|
733 (defun find-file-read-only-other-window (filename &optional codesys)
|
|
|
734 "Edit file FILENAME in another window but don't allow changes.
|
|
|
735 Like \\[find-file-other-window] but marks buffer as read-only.
|
|
|
736 Use \\[toggle-read-only] to permit editing.
|
|
771
|
737 Optional second argument specifies the coding system to use when decoding
|
|
|
738 the file. Interactively, with a prefix argument, you will be prompted for
|
|
|
739 the coding system."
|
|
428
|
740 (interactive "fFind file read-only other window: \nZCoding system: ")
|
|
|
741 (if codesys
|
|
|
742 (let ((coding-system-for-read
|
|
|
743 (get-coding-system codesys)))
|
|
|
744 (find-file-other-window filename))
|
|
|
745 (find-file-other-window filename))
|
|
|
746 (setq buffer-read-only t)
|
|
|
747 (current-buffer))
|
|
|
748
|
|
|
749 (defun find-file-read-only-other-frame (filename &optional codesys)
|
|
|
750 "Edit file FILENAME in another frame but don't allow changes.
|
|
|
751 Like \\[find-file-other-frame] but marks buffer as read-only.
|
|
|
752 Use \\[toggle-read-only] to permit editing.
|
|
771
|
753 Optional second argument specifies the coding system to use when decoding
|
|
|
754 the file. Interactively, with a prefix argument, you will be prompted for
|
|
|
755 the coding system."
|
|
428
|
756 (interactive "fFind file read-only other frame: \nZCoding system: ")
|
|
|
757 (if codesys
|
|
|
758 (let ((coding-system-for-read
|
|
|
759 (get-coding-system codesys)))
|
|
|
760 (find-file-other-frame filename))
|
|
|
761 (find-file-other-frame filename))
|
|
|
762 (setq buffer-read-only t)
|
|
|
763 (current-buffer))
|
|
|
764
|
|
|
765 (defun find-alternate-file-other-window (filename &optional codesys)
|
|
|
766 "Find file FILENAME as a replacement for the file in the next window.
|
|
771
|
767 This command does not select that window. Optional second argument
|
|
|
768 specifies the coding system to use when decoding the file. Interactively,
|
|
428
|
769 with a prefix argument, you will be prompted for the coding system."
|
|
|
770 (interactive
|
|
|
771 (save-selected-window
|
|
|
772 (other-window 1)
|
|
|
773 (let ((file buffer-file-name)
|
|
|
774 (file-name nil)
|
|
|
775 (file-dir nil))
|
|
|
776 (and file
|
|
|
777 (setq file-name (file-name-nondirectory file)
|
|
|
778 file-dir (file-name-directory file)))
|
|
|
779 (list (read-file-name
|
|
|
780 "Find alternate file: " file-dir nil nil file-name)
|
|
771
|
781 (if current-prefix-arg (read-coding-system "Coding-system: "))))))
|
|
428
|
782 (if (one-window-p)
|
|
|
783 (find-file-other-window filename)
|
|
|
784 (save-selected-window
|
|
|
785 (other-window 1)
|
|
|
786 (find-alternate-file filename codesys))))
|
|
|
787
|
|
|
788 (defun find-alternate-file (filename &optional codesys)
|
|
|
789 "Find file FILENAME, select its buffer, kill previous buffer.
|
|
|
790 If the current buffer now contains an empty file that you just visited
|
|
771
|
791 \(presumably by mistake), use this command to visit the file you really
|
|
|
792 want. Optional second argument specifies the coding system to use when
|
|
|
793 decoding the file. Interactively, with a prefix argument, you will be
|
|
|
794 prompted for the coding system."
|
|
428
|
795 (interactive
|
|
|
796 (let ((file buffer-file-name)
|
|
|
797 (file-name nil)
|
|
|
798 (file-dir nil))
|
|
|
799 (and file
|
|
|
800 (setq file-name (file-name-nondirectory file)
|
|
|
801 file-dir (file-name-directory file)))
|
|
|
802 (list (read-file-name
|
|
|
803 "Find alternate file: " file-dir nil nil file-name)
|
|
771
|
804 (if current-prefix-arg (read-coding-system "Coding-system: ")))))
|
|
428
|
805 (and (buffer-modified-p) (buffer-file-name)
|
|
|
806 ;; (not buffer-read-only)
|
|
|
807 (not (yes-or-no-p (format
|
|
|
808 "Buffer %s is modified; kill anyway? "
|
|
|
809 (buffer-name))))
|
|
|
810 (error "Aborted"))
|
|
|
811 (let ((obuf (current-buffer))
|
|
|
812 (ofile buffer-file-name)
|
|
|
813 (onum buffer-file-number)
|
|
|
814 (otrue buffer-file-truename)
|
|
|
815 (oname (buffer-name)))
|
|
|
816 (if (get-buffer " **lose**")
|
|
|
817 (kill-buffer " **lose**"))
|
|
|
818 (rename-buffer " **lose**")
|
|
|
819 (setq buffer-file-name nil)
|
|
|
820 (setq buffer-file-number nil)
|
|
|
821 (setq buffer-file-truename nil)
|
|
|
822 (unwind-protect
|
|
|
823 (progn
|
|
|
824 (unlock-buffer)
|
|
|
825 (if codesys
|
|
|
826 (let ((coding-system-for-read
|
|
|
827 (get-coding-system codesys)))
|
|
|
828 (find-file filename))
|
|
|
829 (find-file filename)))
|
|
|
830 (cond ((eq obuf (current-buffer))
|
|
|
831 (setq buffer-file-name ofile)
|
|
|
832 (setq buffer-file-number onum)
|
|
|
833 (setq buffer-file-truename otrue)
|
|
|
834 (lock-buffer)
|
|
|
835 (rename-buffer oname))))
|
|
|
836 (or (eq (current-buffer) obuf)
|
|
|
837 (kill-buffer obuf))))
|
|
|
838
|
|
|
839 (defun create-file-buffer (filename)
|
|
|
840 "Create a suitably named buffer for visiting FILENAME, and return it.
|
|
|
841 FILENAME (sans directory) is used unchanged if that name is free;
|
|
|
842 otherwise a string <2> or <3> or ... is appended to get an unused name."
|
|
|
843 (let ((handler (find-file-name-handler filename 'create-file-buffer)))
|
|
|
844 (if handler
|
|
|
845 (funcall handler 'create-file-buffer filename)
|
|
|
846 (let ((lastname (file-name-nondirectory filename)))
|
|
|
847 (if (string= lastname "")
|
|
|
848 (setq lastname filename))
|
|
|
849 (generate-new-buffer lastname)))))
|
|
|
850
|
|
|
851 (defun generate-new-buffer (name)
|
|
|
852 "Create and return a buffer with a name based on NAME.
|
|
|
853 Choose the buffer's name using `generate-new-buffer-name'."
|
|
|
854 (get-buffer-create (generate-new-buffer-name name)))
|
|
|
855
|
|
|
856 (defvar abbreviated-home-dir nil
|
|
|
857 "The user's homedir abbreviated according to `directory-abbrev-alist'.")
|
|
|
858
|
|
|
859 (defun abbreviate-file-name (filename &optional hack-homedir)
|
|
|
860 "Return a version of FILENAME shortened using `directory-abbrev-alist'.
|
|
|
861 See documentation of variable `directory-abbrev-alist' for more information.
|
|
|
862 If optional argument HACK-HOMEDIR is non-nil, then this also substitutes
|
|
|
863 \"~\" for the user's home directory."
|
|
|
864 (let ((handler (find-file-name-handler filename 'abbreviate-file-name)))
|
|
|
865 (if handler
|
|
|
866 (funcall handler 'abbreviate-file-name filename hack-homedir)
|
|
|
867 ;; Get rid of the prefixes added by the automounter.
|
|
|
868 ;;(if (and (string-match automount-dir-prefix filename)
|
|
|
869 ;; (file-exists-p (file-name-directory
|
|
|
870 ;; (substring filename (1- (match-end 0))))))
|
|
|
871 ;; (setq filename (substring filename (1- (match-end 0)))))
|
|
|
872 (let ((tail directory-abbrev-alist))
|
|
|
873 ;; If any elt of directory-abbrev-alist matches this name,
|
|
|
874 ;; abbreviate accordingly.
|
|
|
875 (while tail
|
|
|
876 (when (string-match (car (car tail)) filename)
|
|
|
877 (setq filename
|
|
|
878 (concat (cdr (car tail)) (substring filename (match-end 0)))))
|
|
|
879 (setq tail (cdr tail))))
|
|
|
880 (when hack-homedir
|
|
|
881 ;; Compute and save the abbreviated homedir name.
|
|
440
|
882 ;; We defer computing this until the first time it's needed,
|
|
|
883 ;; to give time for directory-abbrev-alist to be set properly.
|
|
|
884 ;; We include the separator at the end, to avoid spurious
|
|
|
885 ;; matches such as `/usr/foobar' when the home dir is
|
|
|
886 ;; `/usr/foo'.
|
|
428
|
887 (or abbreviated-home-dir
|
|
|
888 (setq abbreviated-home-dir
|
|
|
889 (let ((abbreviated-home-dir "$foo"))
|
|
440
|
890 (concat "\\`"
|
|
|
891 (regexp-quote
|
|
|
892 (abbreviate-file-name (expand-file-name "~")))
|
|
|
893 "\\("
|
|
|
894 (regexp-quote (string directory-sep-char))
|
|
|
895 "\\|\\'\\)"))))
|
|
428
|
896 ;; If FILENAME starts with the abbreviated homedir,
|
|
|
897 ;; make it start with `~' instead.
|
|
|
898 (if (and (string-match abbreviated-home-dir filename)
|
|
|
899 ;; If the home dir is just /, don't change it.
|
|
440
|
900 (not (and (= (match-end 0) 1)
|
|
|
901 (= (aref filename 0) directory-sep-char)))
|
|
|
902 (not (and (eq system-type 'windows-nt)
|
|
428
|
903 (save-match-data
|
|
440
|
904 (string-match (concat "\\`[a-zA-Z]:"
|
|
|
905 (regexp-quote
|
|
|
906 (string directory-sep-char))
|
|
|
907 "\\'")
|
|
|
908 filename)))))
|
|
428
|
909 (setq filename
|
|
|
910 (concat "~"
|
|
440
|
911 (match-string 1 filename)
|
|
428
|
912 (substring filename (match-end 0))))))
|
|
|
913 filename)))
|
|
|
914
|
|
|
915 (defcustom find-file-not-true-dirname-list nil
|
|
|
916 "*List of logical names for which visiting shouldn't save the true dirname."
|
|
|
917 :type '(repeat (string :tag "Name"))
|
|
|
918 :group 'find-file)
|
|
|
919
|
|
|
920 ;; This function is needed by FSF vc.el. I hope somebody can make it
|
|
|
921 ;; work for XEmacs. -sb.
|
|
|
922 ;; #### In what way does it not work? --hniksic
|
|
|
923 (defun find-buffer-visiting (filename)
|
|
|
924 "Return the buffer visiting file FILENAME (a string).
|
|
|
925 This is like `get-file-buffer', except that it checks for any buffer
|
|
|
926 visiting the same file, possibly under a different name.
|
|
|
927 If there is no such live buffer, return nil."
|
|
|
928 (let ((buf (get-file-buffer filename))
|
|
|
929 (truename (abbreviate-file-name (file-truename filename))))
|
|
|
930 (or buf
|
|
|
931 (let ((list (buffer-list)) found)
|
|
|
932 (while (and (not found) list)
|
|
|
933 (save-excursion
|
|
|
934 (set-buffer (car list))
|
|
|
935 (if (and buffer-file-name
|
|
|
936 (string= buffer-file-truename truename))
|
|
|
937 (setq found (car list))))
|
|
|
938 (setq list (cdr list)))
|
|
|
939 found)
|
|
|
940 (let ((number (nthcdr 10 (file-attributes truename)))
|
|
|
941 (list (buffer-list)) found)
|
|
|
942 (and buffer-file-numbers-unique
|
|
|
943 number
|
|
|
944 (while (and (not found) list)
|
|
|
945 (save-excursion
|
|
|
946 (set-buffer (car list))
|
|
|
947 (if (and buffer-file-number
|
|
|
948 (equal buffer-file-number number)
|
|
|
949 ;; Verify this buffer's file number
|
|
|
950 ;; still belongs to its file.
|
|
|
951 (file-exists-p buffer-file-name)
|
|
|
952 (equal (nthcdr 10 (file-attributes buffer-file-name))
|
|
|
953 number))
|
|
|
954 (setq found (car list))))
|
|
|
955 (setq list (cdr list))))
|
|
|
956 found))))
|
|
|
957
|
|
444
|
958 (defun insert-file-contents-literally (filename &optional visit start end replace)
|
|
428
|
959 "Like `insert-file-contents', q.v., but only reads in the file.
|
|
|
960 A buffer may be modified in several ways after reading into the buffer due
|
|
442
|
961 to advanced Emacs features, such as format decoding, character code
|
|
444
|
962 conversion, find-file-hooks, automatic uncompression, etc.
|
|
442
|
963
|
|
428
|
964 This function ensures that none of these modifications will take place."
|
|
442
|
965 (let ((wrap-func (find-file-name-handler filename
|
|
|
966 'insert-file-contents-literally)))
|
|
444
|
967 (if wrap-func
|
|
442
|
968 (funcall wrap-func 'insert-file-contents-literally filename
|
|
444
|
969 visit start end replace)
|
|
442
|
970 (let ((file-name-handler-alist nil)
|
|
|
971 (format-alist nil)
|
|
|
972 (after-insert-file-functions nil)
|
|
|
973 (coding-system-for-read 'binary)
|
|
|
974 (coding-system-for-write 'binary)
|
|
|
975 (find-buffer-file-type-function
|
|
|
976 (if (fboundp 'find-buffer-file-type)
|
|
|
977 (symbol-function 'find-buffer-file-type)
|
|
|
978 nil)))
|
|
|
979 (unwind-protect
|
|
|
980 (progn
|
|
|
981 (fset 'find-buffer-file-type (lambda (filename) t))
|
|
444
|
982 (insert-file-contents filename visit start end replace))
|
|
442
|
983 (if find-buffer-file-type-function
|
|
|
984 (fset 'find-buffer-file-type find-buffer-file-type-function)
|
|
|
985 (fmakunbound 'find-buffer-file-type)))))))
|
|
428
|
986
|
|
|
987 (defun find-file-noselect (filename &optional nowarn rawfile)
|
|
|
988 "Read file FILENAME into a buffer and return the buffer.
|
|
|
989 If a buffer exists visiting FILENAME, return that one, but
|
|
|
990 verify that the file has not changed since visited or saved.
|
|
|
991 The buffer is not selected, just returned to the caller.
|
|
|
992 If NOWARN is non-nil, warning messages will be suppressed.
|
|
|
993 If RAWFILE is non-nil, the file is read literally."
|
|
|
994 (setq filename (abbreviate-file-name (expand-file-name filename)))
|
|
|
995 (if (file-directory-p filename)
|
|
|
996 (if (and (fboundp 'dired-noselect) find-file-run-dired)
|
|
526
|
997 (declare-fboundp
|
|
|
998 (dired-noselect (if find-file-use-truenames
|
|
|
999 (abbreviate-file-name (file-truename filename))
|
|
|
1000 filename)))
|
|
428
|
1001 (error "%s is a directory" filename))
|
|
|
1002 (let* ((buf (get-file-buffer filename))
|
|
|
1003 (truename (abbreviate-file-name (file-truename filename)))
|
|
|
1004 (number (nthcdr 10 (file-attributes truename)))
|
|
|
1005 ; ;; Find any buffer for a file which has same truename.
|
|
|
1006 ; (other (and (not buf) (find-buffer-visiting filename)))
|
|
|
1007 (error nil))
|
|
|
1008
|
|
|
1009 ; ;; Let user know if there is a buffer with the same truename.
|
|
|
1010 ; (if (and (not buf) same-truename (not nowarn))
|
|
|
1011 ; (message "%s and %s are the same file (%s)"
|
|
|
1012 ; filename (buffer-file-name same-truename)
|
|
|
1013 ; truename)
|
|
|
1014 ; (if (and (not buf) same-number (not nowarn))
|
|
|
1015 ; (message "%s and %s are the same file"
|
|
|
1016 ; filename (buffer-file-name same-number))))
|
|
|
1017 ; ;; Optionally also find that buffer.
|
|
|
1018 ; (if (or find-file-existing-other-name find-file-visit-truename)
|
|
|
1019 ; (setq buf (or same-truename same-number)))
|
|
|
1020
|
|
|
1021 (when (and buf
|
|
|
1022 (or find-file-compare-truenames find-file-use-truenames)
|
|
|
1023 (not nowarn))
|
|
|
1024 (save-excursion
|
|
|
1025 (set-buffer buf)
|
|
|
1026 (if (not (string-equal buffer-file-name filename))
|
|
|
1027 (message "%s and %s are the same file (%s)"
|
|
|
1028 filename buffer-file-name
|
|
|
1029 buffer-file-truename))))
|
|
|
1030
|
|
|
1031 (if buf
|
|
|
1032 (or nowarn
|
|
|
1033 (verify-visited-file-modtime buf)
|
|
|
1034 (cond ((not (file-exists-p filename))
|
|
|
1035 (error "File %s no longer exists!" filename))
|
|
|
1036 ;; Certain files should be reverted automatically
|
|
|
1037 ;; if they have changed on disk and not in the buffer.
|
|
|
1038 ((and (not (buffer-modified-p buf))
|
|
|
1039 (dolist (rx revert-without-query nil)
|
|
|
1040 (when (string-match rx filename)
|
|
|
1041 (return t))))
|
|
|
1042 (with-current-buffer buf
|
|
|
1043 (message "Reverting file %s..." filename)
|
|
|
1044 (revert-buffer t t)
|
|
|
1045 (message "Reverting file %s... done" filename)))
|
|
|
1046 ((yes-or-no-p
|
|
|
1047 (if (string= (file-name-nondirectory filename)
|
|
|
1048 (buffer-name buf))
|
|
|
1049 (format
|
|
|
1050 (if (buffer-modified-p buf)
|
|
|
1051 (gettext "File %s changed on disk. Discard your edits? ")
|
|
|
1052 (gettext "File %s changed on disk. Reread from disk? "))
|
|
|
1053 (file-name-nondirectory filename))
|
|
|
1054 (format
|
|
|
1055 (if (buffer-modified-p buf)
|
|
|
1056 (gettext "File %s changed on disk. Discard your edits in %s? ")
|
|
|
1057 (gettext "File %s changed on disk. Reread from disk into %s? "))
|
|
|
1058 (file-name-nondirectory filename)
|
|
|
1059 (buffer-name buf))))
|
|
|
1060 (with-current-buffer buf
|
|
|
1061 (revert-buffer t t)))))
|
|
|
1062 ;; Else: we must create a new buffer for filename
|
|
|
1063 (save-excursion
|
|
|
1064 ;;; The truename stuff makes this obsolete.
|
|
|
1065 ;;; (let* ((link-name (car (file-attributes filename)))
|
|
|
1066 ;;; (linked-buf (and (stringp link-name)
|
|
|
1067 ;;; (get-file-buffer link-name))))
|
|
|
1068 ;;; (if (bufferp linked-buf)
|
|
|
1069 ;;; (message "Symbolic link to file in buffer %s"
|
|
|
1070 ;;; (buffer-name linked-buf))))
|
|
|
1071 (setq buf (create-file-buffer filename))
|
|
|
1072 ;; Catch various signals, such as QUIT, and kill the buffer
|
|
|
1073 ;; in that case.
|
|
|
1074 (condition-case data
|
|
|
1075 (progn
|
|
|
1076 (set-buffer-major-mode buf)
|
|
|
1077 (set-buffer buf)
|
|
|
1078 (erase-buffer)
|
|
|
1079 (condition-case ()
|
|
|
1080 (if rawfile
|
|
|
1081 (insert-file-contents-literally filename t)
|
|
|
1082 (insert-file-contents filename t))
|
|
|
1083 (file-error
|
|
|
1084 (when (and (file-exists-p filename)
|
|
|
1085 (not (file-readable-p filename)))
|
|
|
1086 (signal 'file-error (list "File is not readable" filename)))
|
|
|
1087 (if rawfile
|
|
|
1088 ;; Unconditionally set error
|
|
|
1089 (setq error t)
|
|
|
1090 (or
|
|
|
1091 ;; Run find-file-not-found-hooks until one returns non-nil.
|
|
|
1092 (run-hook-with-args-until-success 'find-file-not-found-hooks)
|
|
|
1093 ;; If they fail too, set error.
|
|
|
1094 (setq error t)))))
|
|
|
1095 ;; Find the file's truename, and maybe use that as visited name.
|
|
|
1096 ;; automatically computed in XEmacs, unless jka-compr was used!
|
|
|
1097 (unless buffer-file-truename
|
|
|
1098 (setq buffer-file-truename truename))
|
|
|
1099 (setq buffer-file-number number)
|
|
|
1100 (and find-file-use-truenames
|
|
|
1101 ;; This should be in C. Put pathname
|
|
|
1102 ;; abbreviations that have been explicitly
|
|
|
1103 ;; requested back into the pathname. Most
|
|
|
1104 ;; importantly, strip out automounter /tmp_mnt
|
|
|
1105 ;; directories so that auto-save will work
|
|
|
1106 (setq buffer-file-name (abbreviate-file-name buffer-file-name)))
|
|
|
1107 ;; Set buffer's default directory to that of the file.
|
|
|
1108 (setq default-directory (file-name-directory buffer-file-name))
|
|
|
1109 ;; Turn off backup files for certain file names. Since
|
|
|
1110 ;; this is a permanent local, the major mode won't eliminate it.
|
|
|
1111 (and (not (funcall backup-enable-predicate buffer-file-name))
|
|
|
1112 (progn
|
|
|
1113 (make-local-variable 'backup-inhibited)
|
|
|
1114 (setq backup-inhibited t)))
|
|
|
1115 (if rawfile
|
|
|
1116 ;; #### FSF 20.3 sets buffer-file-coding-system to
|
|
|
1117 ;; `no-conversion' here. Should we copy? It also
|
|
|
1118 ;; makes `find-file-literally' a local variable
|
|
|
1119 ;; and sets it to t.
|
|
|
1120 nil
|
|
|
1121 (after-find-file error (not nowarn))
|
|
|
1122 (setq buf (current-buffer))))
|
|
|
1123 (t
|
|
|
1124 (kill-buffer buf)
|
|
442
|
1125 (signal (car data) (cdr data))))
|
|
|
1126 ))
|
|
428
|
1127 buf)))
|
|
|
1128
|
|
|
1129 ;; FSF has `insert-file-literally' and `find-file-literally' here.
|
|
|
1130
|
|
|
1131 (defvar after-find-file-from-revert-buffer nil)
|
|
|
1132
|
|
|
1133 (defun after-find-file (&optional error warn noauto
|
|
|
1134 after-find-file-from-revert-buffer
|
|
|
1135 nomodes)
|
|
|
1136 "Called after finding a file and by the default revert function.
|
|
|
1137 Sets buffer mode, parses local variables.
|
|
|
1138 Optional args ERROR, WARN, and NOAUTO: ERROR non-nil means there was an
|
|
|
1139 error in reading the file. WARN non-nil means warn if there
|
|
|
1140 exists an auto-save file more recent than the visited file.
|
|
|
1141 NOAUTO means don't mess with auto-save mode.
|
|
|
1142 Fourth arg AFTER-FIND-FILE-FROM-REVERT-BUFFER non-nil
|
|
|
1143 means this call was from `revert-buffer'.
|
|
|
1144 Fifth arg NOMODES non-nil means don't alter the file's modes.
|
|
|
1145 Finishes by calling the functions in `find-file-hooks'."
|
|
|
1146 (setq buffer-read-only (not (file-writable-p buffer-file-name)))
|
|
|
1147 (if noninteractive
|
|
|
1148 nil
|
|
|
1149 (let* (not-serious
|
|
|
1150 (msg
|
|
|
1151 (cond ((and error (file-attributes buffer-file-name))
|
|
|
1152 (setq buffer-read-only t)
|
|
|
1153 (gettext "File exists, but cannot be read."))
|
|
|
1154 ((not buffer-read-only)
|
|
|
1155 (if (and warn
|
|
|
1156 (file-newer-than-file-p (make-auto-save-file-name)
|
|
|
1157 buffer-file-name))
|
|
|
1158 (format "%s has auto save data; consider M-x recover-file"
|
|
|
1159 (file-name-nondirectory buffer-file-name))
|
|
|
1160 (setq not-serious t)
|
|
|
1161 (if error (gettext "(New file)") nil)))
|
|
|
1162 ((not error)
|
|
|
1163 (setq not-serious t)
|
|
|
1164 (gettext "Note: file is write protected"))
|
|
|
1165 ((file-attributes (directory-file-name default-directory))
|
|
|
1166 (gettext "File not found and directory write-protected"))
|
|
|
1167 ((file-exists-p (file-name-directory buffer-file-name))
|
|
|
1168 (setq buffer-read-only nil))
|
|
|
1169 (t
|
|
|
1170 ;; If the directory the buffer is in doesn't exist,
|
|
|
1171 ;; offer to create it. It's better to do this now
|
|
|
1172 ;; than when we save the buffer, because we want
|
|
|
1173 ;; autosaving to work.
|
|
|
1174 (setq buffer-read-only nil)
|
|
|
1175 ;; XEmacs
|
|
|
1176 (or (file-exists-p (file-name-directory buffer-file-name))
|
|
|
1177 (condition-case nil
|
|
|
1178 (if (yes-or-no-p
|
|
|
1179 (format
|
|
|
1180 "\
|
|
|
1181 The directory containing %s does not exist. Create? "
|
|
|
1182 (abbreviate-file-name buffer-file-name)))
|
|
|
1183 (make-directory (file-name-directory
|
|
|
1184 buffer-file-name)
|
|
|
1185 t))
|
|
|
1186 (quit
|
|
|
1187 (kill-buffer (current-buffer))
|
|
|
1188 (signal 'quit nil))))
|
|
|
1189 nil))))
|
|
|
1190 (if msg
|
|
|
1191 (progn
|
|
|
1192 (message "%s" msg)
|
|
|
1193 (or not-serious (sit-for 1 t)))))
|
|
|
1194 (if (and auto-save-default (not noauto))
|
|
|
1195 (auto-save-mode t)))
|
|
|
1196 (unless nomodes
|
|
|
1197 (normal-mode t)
|
|
|
1198 (run-hooks 'find-file-hooks)))
|
|
|
1199
|
|
|
1200 (defun normal-mode (&optional find-file)
|
|
|
1201 "Choose the major mode for this buffer automatically.
|
|
|
1202 Also sets up any specified local variables of the file.
|
|
|
1203 Uses the visited file name, the -*- line, and the local variables spec.
|
|
|
1204
|
|
|
1205 This function is called automatically from `find-file'. In that case,
|
|
|
1206 we may set up specified local variables depending on the value of
|
|
|
1207 `enable-local-variables': if it is t, we do; if it is nil, we don't;
|
|
|
1208 otherwise, we query. `enable-local-variables' is ignored if you
|
|
|
1209 run `normal-mode' explicitly."
|
|
|
1210 (interactive)
|
|
|
1211 (or find-file (funcall (or default-major-mode 'fundamental-mode)))
|
|
793
|
1212 (and (with-trapping-errors
|
|
|
1213 :operation "File mode specification"
|
|
|
1214 :class 'file-mode-spec
|
|
|
1215 :error-form nil
|
|
|
1216 (set-auto-mode)
|
|
|
1217 t)
|
|
|
1218 (with-trapping-errors
|
|
|
1219 :operation "File local-variables"
|
|
|
1220 :class 'local-variables
|
|
|
1221 :error-form nil
|
|
|
1222 (hack-local-variables (not find-file)))))
|
|
428
|
1223
|
|
|
1224 ;; #### This variable sucks in the package model. There should be a
|
|
|
1225 ;; way for new packages to add their entries to auto-mode-alist in a
|
|
|
1226 ;; clean way. Per Abrahamsen suggested splitting auto-mode-alist to
|
|
|
1227 ;; several distinct variables such as, in order of precedence,
|
|
|
1228 ;; `user-auto-mode-alist' for users, `package-auto-mode-alist' for
|
|
|
1229 ;; packages and `auto-mode-alist' (which might also be called
|
|
|
1230 ;; `default-auto-mode-alist') for default stuff, such as some of the
|
|
|
1231 ;; entries below.
|
|
|
1232
|
|
|
1233 (defvar auto-mode-alist
|
|
|
1234 '(("\\.te?xt\\'" . text-mode)
|
|
|
1235 ("\\.[chi]\\'" . c-mode)
|
|
|
1236 ("\\.el\\'" . emacs-lisp-mode)
|
|
|
1237 ("\\.\\(?:[CH]\\|cc\\|hh\\)\\'" . c++-mode)
|
|
|
1238 ("\\.[ch]\\(pp\\|xx\\|\\+\\+\\)\\'" . c++-mode)
|
|
|
1239 ("\\.java\\'" . java-mode)
|
|
|
1240 ("\\.idl\\'" . idl-mode)
|
|
|
1241 ("\\.f\\(?:or\\)?\\'" . fortran-mode)
|
|
|
1242 ("\\.F\\(?:OR\\)?\\'" . fortran-mode)
|
|
|
1243 ("\\.[fF]90\\'" . f90-mode)
|
|
|
1244 ;;; Less common extensions come here
|
|
|
1245 ;;; so more common ones above are found faster.
|
|
|
1246 ("\\.\\([pP][Llm]\\|al\\)\\'" . perl-mode)
|
|
|
1247 ("\\.py\\'" . python-mode)
|
|
|
1248 ("\\.texi\\(?:nfo\\)?\\'" . texinfo-mode)
|
|
|
1249 ("\\.ad[abs]\\'" . ada-mode)
|
|
|
1250 ("\\.c?l\\(?:i?sp\\)?\\'" . lisp-mode)
|
|
|
1251 ("\\.p\\(?:as\\)?\\'" . pascal-mode)
|
|
|
1252 ("\\.ltx\\'" . latex-mode)
|
|
|
1253 ("\\.[sS]\\'" . asm-mode)
|
|
|
1254 ("[Cc]hange.?[Ll]og?\\(?:.[0-9]+\\)?\\'" . change-log-mode)
|
|
|
1255 ("\\$CHANGE_LOG\\$\\.TXT" . change-log-mode)
|
|
|
1256 ("\\.scm?\\(?:\\.[0-9]*\\)?\\'" . scheme-mode)
|
|
|
1257 ("\\.e\\'" . eiffel-mode)
|
|
|
1258 ("\\.mss\\'" . scribe-mode)
|
|
|
1259 ("\\.m\\(?:[mes]\\|an\\)\\'" . nroff-mode)
|
|
|
1260 ("\\.icn\\'" . icon-mode)
|
|
|
1261 ("\\.\\(?:[ckz]?sh\\|shar\\)\\'" . sh-mode)
|
|
444
|
1262 ("\\.[Pp][Rr][Oo]\\'" . idlwave-mode)
|
|
792
|
1263 ("\\.si\\(v\\|eve\\)\\'" . sieve-mode)
|
|
428
|
1264 ;; #### Unix-specific!
|
|
|
1265 ("/\\.\\(?:bash_\\|z\\)?\\(profile\\|login\\|logout\\)\\'" . sh-mode)
|
|
|
1266 ("/\\.\\(?:[ckz]sh\\|bash\\|tcsh\\|es\\|xinit\\|startx\\)rc\\'" . sh-mode)
|
|
|
1267 ("/\\.\\(?:[kz]shenv\\|xsession\\)\\'" . sh-mode)
|
|
442
|
1268 ("\\.m?spec$" .sh-mode)
|
|
428
|
1269 ;; The following come after the ChangeLog pattern for the sake of
|
|
|
1270 ;; ChangeLog.1, etc. and after the .scm.[0-9] pattern too.
|
|
688
|
1271 ("\\.[123456789]\\'" . nroff-mode)
|
|
428
|
1272 ("\\.[tT]e[xX]\\'" . tex-mode)
|
|
|
1273 ("\\.\\(?:sty\\|cls\\|bbl\\)\\'" . latex-mode)
|
|
|
1274 ("\\.bib\\'" . bibtex-mode)
|
|
|
1275 ("\\.article\\'" . text-mode)
|
|
|
1276 ("\\.letter\\'" . text-mode)
|
|
|
1277 ("\\.\\(?:tcl\\|exp\\)\\'" . tcl-mode)
|
|
|
1278 ("\\.wrl\\'" . vrml-mode)
|
|
|
1279 ("\\.awk\\'" . awk-mode)
|
|
|
1280 ("\\.prolog\\'" . prolog-mode)
|
|
|
1281 ("\\.\\(?:arc\\|zip\\|lzh\\|zoo\\)\\'" . archive-mode)
|
|
|
1282 ;; Mailer puts message to be edited in /tmp/Re.... or Message
|
|
|
1283 ;; #### Unix-specific!
|
|
|
1284 ("\\`/tmp/Re" . text-mode)
|
|
|
1285 ("/Message[0-9]*\\'" . text-mode)
|
|
|
1286 ("/drafts/[0-9]+\\'" . mh-letter-mode)
|
|
|
1287 ;; some news reader is reported to use this
|
|
|
1288 ("^/tmp/fol/" . text-mode)
|
|
|
1289 ("\\.y\\'" . c-mode)
|
|
|
1290 ("\\.lex\\'" . c-mode)
|
|
|
1291 ("\\.m\\'" . objc-mode)
|
|
|
1292 ("\\.oak\\'" . scheme-mode)
|
|
442
|
1293 ("\\.[sj]?html?\\'" . html-mode)
|
|
|
1294 ("\\.jsp\\'" . html-mode)
|
|
|
1295 ("\\.xml\\'" . xml-mode)
|
|
428
|
1296 ("\\.\\(?:sgml?\\|dtd\\)\\'" . sgml-mode)
|
|
|
1297 ("\\.c?ps\\'" . postscript-mode)
|
|
|
1298 ;; .emacs following a directory delimiter in either Unix or
|
|
|
1299 ;; Windows syntax.
|
|
|
1300 ("[/\\][._].*emacs\\'" . emacs-lisp-mode)
|
|
|
1301 ("\\.m4\\'" . autoconf-mode)
|
|
663
|
1302 ("configure\\.\\(in\\|ac\\)\\'" . autoconf-mode)
|
|
428
|
1303 ("\\.ml\\'" . lisp-mode)
|
|
442
|
1304 ("\\.ma?ke?\\'" . makefile-mode)
|
|
774
|
1305 ("\\(GNU\\)?[Mm]akefile\\(\\.\\|\\'\\)" . makefile-mode)
|
|
|
1306 ("[./\\]X\\(defaults\\|environment\\|resources\\|modmap\\)\\'" . xrdb-mode)
|
|
428
|
1307 ;; #### The following three are Unix-specific (but do we care?)
|
|
|
1308 ("/app-defaults/" . xrdb-mode)
|
|
|
1309 ("\\.[^/]*wm2?\\(?:rc\\)?\\'" . winmgr-mode)
|
|
|
1310 ("\\.\\(?:jpe?g\\|JPE?G\\|png\\|PNG\\|gif\\|GIF\\|tiff?\\|TIFF?\\)\\'" . image-mode)
|
|
|
1311 )
|
|
|
1312 "Alist of filename patterns vs. corresponding major mode functions.
|
|
|
1313 Each element looks like (REGEXP . FUNCTION) or (REGEXP FUNCTION NON-NIL).
|
|
|
1314 \(NON-NIL stands for anything that is not nil; the value does not matter.)
|
|
|
1315 Visiting a file whose name matches REGEXP specifies FUNCTION as the
|
|
|
1316 mode function to use. FUNCTION will be called, unless it is nil.
|
|
|
1317
|
|
|
1318 If the element has the form (REGEXP FUNCTION NON-NIL), then after
|
|
|
1319 calling FUNCTION (if it's not nil), we delete the suffix that matched
|
|
|
1320 REGEXP and search the list again for another match.")
|
|
|
1321
|
|
|
1322 (defvar interpreter-mode-alist
|
|
|
1323 '(("^#!.*csh" . sh-mode)
|
|
|
1324 ("^#!.*\\b\\(scope\\|wish\\|tcl\\|tclsh\\|expect\\)" . tcl-mode)
|
|
|
1325 ("^#!.*sh\\b" . sh-mode)
|
|
|
1326 ("perl" . perl-mode)
|
|
|
1327 ("python" . python-mode)
|
|
|
1328 ("awk\\b" . awk-mode)
|
|
|
1329 ("rexx" . rexx-mode)
|
|
|
1330 ("scm\\|guile" . scheme-mode)
|
|
|
1331 ("emacs" . emacs-lisp-mode)
|
|
|
1332 ("make" . makefile-mode)
|
|
|
1333 ("^:" . sh-mode))
|
|
|
1334 "Alist mapping interpreter names to major modes.
|
|
|
1335 This alist is used to guess the major mode of a file based on the
|
|
|
1336 contents of the first line. This line often contains something like:
|
|
|
1337 #!/bin/sh
|
|
|
1338 but may contain something more imaginative like
|
|
|
1339 #! /bin/env python
|
|
|
1340 or
|
|
|
1341 eval 'exec perl -w -S $0 ${1+\"$@\"}'.
|
|
|
1342
|
|
|
1343 Each alist element looks like (INTERPRETER . MODE).
|
|
|
1344 The car of each element is a regular expression which is compared
|
|
|
1345 with the name of the interpreter specified in the first line.
|
|
|
1346 If it matches, mode MODE is selected.")
|
|
|
1347
|
|
|
1348 (defvar binary-file-regexps
|
|
444
|
1349 '("\\.\\(?:bz2\\|elc\\|g\\(if\\|z\\)\\|jp\\(eg\\|g\\)\\|png\\|t\\(ar\\|gz\\|iff\\)\\|[Zo]\\)\\'")
|
|
428
|
1350 "List of regexps of filenames containing binary (non-text) data.")
|
|
|
1351
|
|
|
1352 ; (eval-when-compile
|
|
|
1353 ; (require 'regexp-opt)
|
|
|
1354 ; (list
|
|
|
1355 ; (format "\\.\\(?:%s\\)\\'"
|
|
|
1356 ; (regexp-opt
|
|
|
1357 ; '("tar"
|
|
|
1358 ; "tgz"
|
|
|
1359 ; "gz"
|
|
|
1360 ; "bz2"
|
|
|
1361 ; "Z"
|
|
|
1362 ; "o"
|
|
|
1363 ; "elc"
|
|
|
1364 ; "png"
|
|
|
1365 ; "gif"
|
|
|
1366 ; "tiff"
|
|
|
1367 ; "jpg"
|
|
|
1368 ; "jpeg"))))))
|
|
444
|
1369
|
|
428
|
1370 (defvar inhibit-first-line-modes-regexps
|
|
444
|
1371 binary-file-regexps
|
|
428
|
1372 "List of regexps; if one matches a file name, don't look for `-*-'.")
|
|
|
1373
|
|
|
1374 (defvar inhibit-first-line-modes-suffixes nil
|
|
|
1375 "List of regexps for what to ignore, for `inhibit-first-line-modes-regexps'.
|
|
|
1376 When checking `inhibit-first-line-modes-regexps', we first discard
|
|
|
1377 from the end of the file name anything that matches one of these regexps.")
|
|
|
1378
|
|
|
1379 (defvar user-init-file
|
|
|
1380 nil ; set by command-line
|
|
|
1381 "File name including directory of user's initialization file.")
|
|
|
1382
|
|
|
1383 (defun set-auto-mode (&optional just-from-file-name)
|
|
|
1384 "Select major mode appropriate for current buffer.
|
|
|
1385 This checks for a -*- mode tag in the buffer's text,
|
|
|
1386 compares the filename against the entries in `auto-mode-alist',
|
|
|
1387 or checks the interpreter that runs this file against
|
|
|
1388 `interpreter-mode-alist'.
|
|
|
1389
|
|
|
1390 It does not check for the `mode:' local variable in the
|
|
|
1391 Local Variables section of the file; for that, use `hack-local-variables'.
|
|
|
1392
|
|
|
1393 If `enable-local-variables' is nil, this function does not check for a
|
|
|
1394 -*- mode tag.
|
|
|
1395
|
|
|
1396 If the optional argument JUST-FROM-FILE-NAME is non-nil,
|
|
|
1397 then we do not set anything but the major mode,
|
|
|
1398 and we don't even do that unless it would come from the file name."
|
|
|
1399 (save-excursion
|
|
|
1400 ;; Look for -*-MODENAME-*- or -*- ... mode: MODENAME; ... -*-
|
|
|
1401 ;; Do this by calling the hack-local-variables helper to avoid redundancy.
|
|
|
1402 ;; We bind enable-local-variables to nil this time because we're going to
|
|
|
1403 ;; call hack-local-variables-prop-line again later, "for real." Note that
|
|
|
1404 ;; this temporary binding does not prevent hack-local-variables-prop-line
|
|
|
1405 ;; from setting the major mode.
|
|
|
1406 (or (and enable-local-variables
|
|
|
1407 (let ((enable-local-variables nil))
|
|
|
1408 (hack-local-variables-prop-line nil))
|
|
|
1409 )
|
|
|
1410 ;; It's not in the -*- line, so check the auto-mode-alist, unless
|
|
|
1411 ;; this buffer isn't associated with a file.
|
|
|
1412 (null buffer-file-name)
|
|
|
1413 (let ((name (file-name-sans-versions buffer-file-name))
|
|
|
1414 (keep-going t))
|
|
|
1415 (while keep-going
|
|
|
1416 (setq keep-going nil)
|
|
|
1417 (let ((alist auto-mode-alist)
|
|
|
1418 (mode nil))
|
|
440
|
1419
|
|
428
|
1420 ;; Find first matching alist entry.
|
|
440
|
1421
|
|
|
1422 ;; #### This is incorrect. In NT, case sensitivity is a volume
|
|
|
1423 ;; property. For instance, NFS mounts *are* case sensitive.
|
|
|
1424 ;; Need internal function (file-name-case-sensitive f), F
|
|
|
1425 ;; being file or directory name. - kkm
|
|
428
|
1426 (let ((case-fold-search
|
|
440
|
1427 (eq system-type 'windows-nt)))
|
|
428
|
1428 (while (and (not mode) alist)
|
|
|
1429 (if (string-match (car (car alist)) name)
|
|
|
1430 (if (and (consp (cdr (car alist)))
|
|
|
1431 (nth 2 (car alist)))
|
|
|
1432 (progn
|
|
|
1433 (setq mode (car (cdr (car alist)))
|
|
|
1434 name (substring name 0 (match-beginning 0))
|
|
|
1435 keep-going t))
|
|
|
1436 (setq mode (cdr (car alist))
|
|
|
1437 keep-going nil)))
|
|
|
1438 (setq alist (cdr alist))))
|
|
|
1439 (unless just-from-file-name
|
|
|
1440 ;; If we can't deduce a mode from the file name,
|
|
|
1441 ;; look for an interpreter specified in the first line.
|
|
|
1442 (if (and (null mode)
|
|
|
1443 (save-excursion ; XEmacs
|
|
|
1444 (goto-char (point-min))
|
|
|
1445 (looking-at "#!")))
|
|
|
1446 (let ((firstline
|
|
|
1447 (buffer-substring
|
|
|
1448 (point-min)
|
|
|
1449 (save-excursion
|
|
|
1450 (goto-char (point-min)) (end-of-line) (point)))))
|
|
|
1451 (setq alist interpreter-mode-alist)
|
|
|
1452 (while alist
|
|
|
1453 (if (string-match (car (car alist)) firstline)
|
|
|
1454 (progn
|
|
|
1455 (setq mode (cdr (car alist)))
|
|
|
1456 (setq alist nil))
|
|
|
1457 (setq alist (cdr alist)))))))
|
|
|
1458 (if mode
|
|
|
1459 (if (not (fboundp mode))
|
|
|
1460 (let ((name (package-get-package-provider mode)))
|
|
|
1461 (if name
|
|
|
1462 (message "Mode %s is not installed. Download package %s" mode name)
|
|
|
1463 (message "Mode %s either doesn't exist or is not a known package" mode))
|
|
|
1464 (sit-for 2)
|
|
|
1465 (error "%s" mode))
|
|
|
1466 (unless (and just-from-file-name
|
|
|
1467 (or
|
|
|
1468 ;; Don't reinvoke major mode.
|
|
|
1469 (eq mode major-mode)
|
|
|
1470 ;; Don't lose on minor modes.
|
|
|
1471 (assq mode minor-mode-alist)))
|
|
|
1472 (funcall mode))))))))))
|
|
|
1473
|
|
|
1474 (defvar hack-local-variables-hook nil
|
|
|
1475 "Normal hook run after processing a file's local variables specs.
|
|
|
1476 Major modes can use this to examine user-specified local variables
|
|
|
1477 in order to initialize other data structure based on them.
|
|
|
1478
|
|
|
1479 This hook runs even if there were no local variables or if their
|
|
|
1480 evaluation was suppressed. See also `enable-local-variables' and
|
|
|
1481 `enable-local-eval'.")
|
|
|
1482
|
|
|
1483 (defun hack-local-variables (&optional force)
|
|
|
1484 "Parse, and bind or evaluate as appropriate, any local variables
|
|
|
1485 for current buffer."
|
|
|
1486 ;; Don't look for -*- if this file name matches any
|
|
|
1487 ;; of the regexps in inhibit-first-line-modes-regexps.
|
|
|
1488 (if (or (null buffer-file-name) ; don't lose if buffer has no file!
|
|
|
1489 (not (let ((temp inhibit-first-line-modes-regexps)
|
|
|
1490 (name (if buffer-file-name
|
|
|
1491 (file-name-sans-versions buffer-file-name)
|
|
|
1492 (buffer-name))))
|
|
|
1493 (while (let ((sufs inhibit-first-line-modes-suffixes))
|
|
|
1494 (while (and sufs (not
|
|
|
1495 (string-match (car sufs) name)))
|
|
|
1496 (setq sufs (cdr sufs)))
|
|
|
1497 sufs)
|
|
|
1498 (setq name (substring name 0 (match-beginning 0))))
|
|
|
1499 (while (and temp
|
|
|
1500 (not (string-match (car temp) name)))
|
|
|
1501 (setq temp (cdr temp))
|
|
|
1502 temp))))
|
|
|
1503 (progn
|
|
|
1504 ;; Look for variables in the -*- line.
|
|
|
1505 (hack-local-variables-prop-line force)
|
|
|
1506 ;; Look for "Local variables:" block in last page.
|
|
|
1507 (hack-local-variables-last-page force)))
|
|
|
1508 (run-hooks 'hack-local-variables-hook))
|
|
|
1509
|
|
|
1510 ;;; Local variables may be specified in the last page of the file (within 3k
|
|
|
1511 ;;; from the end of the file and after the last ^L) in the form
|
|
|
1512 ;;;
|
|
|
1513 ;;; Local variables:
|
|
|
1514 ;;; variable-name: variable-value
|
|
|
1515 ;;; end:
|
|
|
1516 ;;;
|
|
|
1517 ;;; The lines may begin with a common prefix, like ";;; " in the above
|
|
|
1518 ;;; example. They may also have a common suffix (" */" for example). In
|
|
|
1519 ;;; this form, the local variable "mode" can be used to change the major
|
|
|
1520 ;;; mode, and the local variable "eval" can be used to evaluate an arbitrary
|
|
|
1521 ;;; form.
|
|
|
1522 ;;;
|
|
|
1523 ;;; Local variables may also be specified in the first line of the file.
|
|
|
1524 ;;; Embedded in this line are a pair of "-*-" sequences. What lies between
|
|
|
1525 ;;; them are variable-name/variable-value pairs, like:
|
|
|
1526 ;;;
|
|
|
1527 ;;; -*- mode: emacs-lisp -*-
|
|
|
1528 ;;; or -*- mode: postscript; version-control: never -*-
|
|
|
1529 ;;; or -*- tags-file-name: "/foo/bar/TAGS" -*-
|
|
|
1530 ;;;
|
|
|
1531 ;;; The local variable "eval" is not used with this form. For hysterical
|
|
|
1532 ;;; reasons, the syntax "-*- modename -*-" is allowed as well.
|
|
|
1533 ;;;
|
|
|
1534
|
|
|
1535 (defun hack-local-variables-p (modeline)
|
|
|
1536 (or (eq enable-local-variables t)
|
|
|
1537 (and enable-local-variables
|
|
|
1538 (save-window-excursion
|
|
|
1539 (condition-case nil
|
|
|
1540 (switch-to-buffer (current-buffer))
|
|
|
1541 (error
|
|
|
1542 ;; If we fail to switch in the selected window,
|
|
|
1543 ;; it is probably a minibuffer.
|
|
|
1544 ;; So try another window.
|
|
|
1545 (condition-case nil
|
|
|
1546 (switch-to-buffer-other-window (current-buffer))
|
|
|
1547 (error
|
|
|
1548 (switch-to-buffer-other-frame (current-buffer))))))
|
|
|
1549 (or modeline (save-excursion
|
|
|
1550 (beginning-of-line)
|
|
|
1551 (set-window-start (selected-window) (point))))
|
|
|
1552 (y-or-n-p (format
|
|
|
1553 "Set local variables as specified %s of %s? "
|
|
|
1554 (if modeline "in -*- line" "at end")
|
|
|
1555 (if buffer-file-name
|
|
|
1556 (file-name-nondirectory buffer-file-name)
|
|
|
1557 (concat "buffer " (buffer-name)))))))))
|
|
|
1558
|
|
|
1559 (defun hack-local-variables-last-page (&optional force)
|
|
|
1560 ;; Set local variables set in the "Local Variables:" block of the last page.
|
|
|
1561 (save-excursion
|
|
|
1562 (goto-char (point-max))
|
|
|
1563 (search-backward "\n\^L" (max (- (point-max) 3000) (point-min)) 'move)
|
|
|
1564 (if (let ((case-fold-search t))
|
|
|
1565 (and (search-forward "Local Variables:" nil t)
|
|
|
1566 (or force
|
|
|
1567 (hack-local-variables-p nil))))
|
|
|
1568 (let ((continue t)
|
|
444
|
1569 prefix prefixlen suffix start
|
|
428
|
1570 (enable-local-eval enable-local-eval))
|
|
|
1571 ;; The prefix is what comes before "local variables:" in its line.
|
|
|
1572 ;; The suffix is what comes after "local variables:" in its line.
|
|
|
1573 (skip-chars-forward " \t")
|
|
|
1574 (or (eolp)
|
|
|
1575 (setq suffix (buffer-substring (point)
|
|
|
1576 (progn (end-of-line) (point)))))
|
|
|
1577 (goto-char (match-beginning 0))
|
|
|
1578 (or (bolp)
|
|
|
1579 (setq prefix
|
|
|
1580 (buffer-substring (point)
|
|
|
1581 (progn (beginning-of-line) (point)))))
|
|
|
1582 (if prefix (setq prefixlen (length prefix)
|
|
|
1583 prefix (regexp-quote prefix)))
|
|
|
1584 (if suffix (setq suffix (concat (regexp-quote suffix) "$")))
|
|
|
1585 (while continue
|
|
|
1586 ;; Look at next local variable spec.
|
|
|
1587 (if selective-display (re-search-forward "[\n\C-m]")
|
|
|
1588 (forward-line 1))
|
|
|
1589 ;; Skip the prefix, if any.
|
|
|
1590 (if prefix
|
|
|
1591 (if (looking-at prefix)
|
|
|
1592 (forward-char prefixlen)
|
|
|
1593 (error "Local variables entry is missing the prefix")))
|
|
|
1594 ;; Find the variable name; strip whitespace.
|
|
|
1595 (skip-chars-forward " \t")
|
|
444
|
1596 (setq start (point))
|
|
428
|
1597 (skip-chars-forward "^:\n")
|
|
|
1598 (if (eolp) (error "Missing colon in local variables entry"))
|
|
|
1599 (skip-chars-backward " \t")
|
|
444
|
1600 (let* ((str (buffer-substring start (point)))
|
|
428
|
1601 (var (read str))
|
|
|
1602 val)
|
|
|
1603 ;; Setting variable named "end" means end of list.
|
|
|
1604 (if (string-equal (downcase str) "end")
|
|
|
1605 (setq continue nil)
|
|
|
1606 ;; Otherwise read the variable value.
|
|
|
1607 (skip-chars-forward "^:")
|
|
|
1608 (forward-char 1)
|
|
|
1609 (setq val (read (current-buffer)))
|
|
|
1610 (skip-chars-backward "\n")
|
|
|
1611 (skip-chars-forward " \t")
|
|
|
1612 (or (if suffix (looking-at suffix) (eolp))
|
|
|
1613 (error "Local variables entry is terminated incorrectly"))
|
|
|
1614 ;; Set the variable. "Variables" mode and eval are funny.
|
|
|
1615 (hack-one-local-variable var val))))))))
|
|
|
1616
|
|
|
1617 ;; jwz - New Version 20.1/19.15
|
|
|
1618 (defun hack-local-variables-prop-line (&optional force)
|
|
|
1619 ;; Set local variables specified in the -*- line.
|
|
|
1620 ;; Returns t if mode was set.
|
|
|
1621 (let ((result nil))
|
|
|
1622 (save-excursion
|
|
|
1623 (goto-char (point-min))
|
|
|
1624 (skip-chars-forward " \t\n\r")
|
|
|
1625 (let ((end (save-excursion
|
|
|
1626 ;; If the file begins with "#!"
|
|
|
1627 ;; (un*x exec interpreter magic), look
|
|
|
1628 ;; for mode frobs in the first two
|
|
|
1629 ;; lines. You cannot necessarily
|
|
|
1630 ;; put them in the first line of
|
|
|
1631 ;; such a file without screwing up
|
|
|
1632 ;; the interpreter invocation.
|
|
|
1633 (end-of-line (and (looking-at "^#!") 2))
|
|
|
1634 (point))))
|
|
|
1635 ;; Parse the -*- line into the `result' alist.
|
|
|
1636 (cond ((not (search-forward "-*-" end t))
|
|
|
1637 ;; doesn't have one.
|
|
|
1638 (setq force t))
|
|
442
|
1639 ((looking-at "[ \t]*\\([^ \t\n\r:;]+?\\)\\([ \t]*-\\*-\\)")
|
|
428
|
1640 ;; Antiquated form: "-*- ModeName -*-".
|
|
|
1641 (setq result
|
|
|
1642 (list (cons 'mode
|
|
|
1643 (intern (buffer-substring
|
|
|
1644 (match-beginning 1)
|
|
|
1645 (match-end 1)))))
|
|
|
1646 ))
|
|
|
1647 (t
|
|
|
1648 ;; Usual form: '-*-' [ <variable> ':' <value> ';' ]* '-*-'
|
|
|
1649 ;; (last ";" is optional).
|
|
|
1650 (save-excursion
|
|
|
1651 (if (search-forward "-*-" end t)
|
|
|
1652 (setq end (- (point) 3))
|
|
|
1653 (error "-*- not terminated before end of line")))
|
|
|
1654 (while (< (point) end)
|
|
|
1655 (or (looking-at "[ \t]*\\([^ \t\n:]+\\)[ \t]*:[ \t]*")
|
|
|
1656 (error "malformed -*- line"))
|
|
|
1657 (goto-char (match-end 0))
|
|
|
1658 ;; There used to be a downcase here,
|
|
|
1659 ;; but the manual didn't say so,
|
|
|
1660 ;; and people want to set var names that aren't all lc.
|
|
|
1661 (let ((key (intern (buffer-substring
|
|
|
1662 (match-beginning 1)
|
|
|
1663 (match-end 1))))
|
|
|
1664 (val (save-restriction
|
|
|
1665 (narrow-to-region (point) end)
|
|
|
1666 (read (current-buffer)))))
|
|
|
1667 ;; Case sensitivity! Icepicks in my forehead!
|
|
|
1668 (if (equal (downcase (symbol-name key)) "mode")
|
|
|
1669 (setq key 'mode))
|
|
|
1670 (setq result (cons (cons key val) result))
|
|
|
1671 (skip-chars-forward " \t;")))
|
|
|
1672 (setq result (nreverse result))))))
|
|
|
1673
|
|
|
1674 (let ((set-any-p (or force
|
|
|
1675 ;; It's OK to force null specifications.
|
|
|
1676 (null result)
|
|
|
1677 ;; It's OK to force mode-only specifications.
|
|
|
1678 (let ((remaining result)
|
|
|
1679 (mode-specs-only t))
|
|
|
1680 (while remaining
|
|
|
1681 (if (eq (car (car remaining)) 'mode)
|
|
|
1682 (setq remaining (cdr remaining))
|
|
|
1683 ;; Otherwise, we have a real local.
|
|
|
1684 (setq mode-specs-only nil
|
|
|
1685 remaining nil))
|
|
|
1686 )
|
|
|
1687 mode-specs-only)
|
|
|
1688 ;; Otherwise, check.
|
|
|
1689 (hack-local-variables-p t)))
|
|
|
1690 (mode-p nil))
|
|
|
1691 (while result
|
|
|
1692 (let ((key (car (car result)))
|
|
|
1693 (val (cdr (car result))))
|
|
|
1694 (cond ((eq key 'mode)
|
|
|
1695 (setq mode-p t)
|
|
|
1696 (let ((mode (intern (concat (downcase (symbol-name val))
|
|
|
1697 "-mode"))))
|
|
|
1698 ;; Without this guard, `normal-mode' would potentially run
|
|
|
1699 ;; the major mode function twice: once via `set-auto-mode'
|
|
|
1700 ;; and once via `hack-local-variables'.
|
|
|
1701 (if (not (eq mode major-mode))
|
|
|
1702 (funcall mode))
|
|
|
1703 ))
|
|
|
1704 (set-any-p
|
|
|
1705 (hack-one-local-variable key val))
|
|
|
1706 (t
|
|
|
1707 nil)))
|
|
|
1708 (setq result (cdr result)))
|
|
|
1709 mode-p)))
|
|
|
1710
|
|
|
1711 (defconst ignored-local-variables
|
|
|
1712 (list 'enable-local-eval)
|
|
|
1713 "Variables to be ignored in a file's local variable spec.")
|
|
|
1714
|
|
|
1715 ;; Get confirmation before setting these variables as locals in a file.
|
|
|
1716 (put 'debugger 'risky-local-variable t)
|
|
|
1717 (put 'enable-local-eval 'risky-local-variable t)
|
|
|
1718 (put 'ignored-local-variables 'risky-local-variable t)
|
|
|
1719 (put 'eval 'risky-local-variable t)
|
|
|
1720 (put 'file-name-handler-alist 'risky-local-variable t)
|
|
|
1721 (put 'minor-mode-map-alist 'risky-local-variable t)
|
|
|
1722 (put 'after-load-alist 'risky-local-variable t)
|
|
|
1723 (put 'buffer-file-name 'risky-local-variable t)
|
|
|
1724 (put 'buffer-auto-save-file-name 'risky-local-variable t)
|
|
|
1725 (put 'buffer-file-truename 'risky-local-variable t)
|
|
|
1726 (put 'exec-path 'risky-local-variable t)
|
|
|
1727 (put 'load-path 'risky-local-variable t)
|
|
|
1728 (put 'exec-directory 'risky-local-variable t)
|
|
|
1729 (put 'process-environment 'risky-local-variable t)
|
|
|
1730 ;; Don't wait for outline.el to be loaded, for the sake of outline-minor-mode.
|
|
|
1731 (put 'outline-level 'risky-local-variable t)
|
|
|
1732 (put 'rmail-output-file-alist 'risky-local-variable t)
|
|
|
1733
|
|
|
1734 ;; This one is safe because the user gets to check it before it is used.
|
|
|
1735 (put 'compile-command 'safe-local-variable t)
|
|
|
1736
|
|
|
1737 ;(defun hack-one-local-variable-quotep (exp)
|
|
|
1738 ; (and (consp exp) (eq (car exp) 'quote) (consp (cdr exp))))
|
|
|
1739
|
|
|
1740 ;; "Set" one variable in a local variables spec.
|
|
|
1741 ;; A few variable names are treated specially.
|
|
|
1742 (defun hack-one-local-variable (var val)
|
|
|
1743 (cond ((eq var 'mode)
|
|
|
1744 (funcall (intern (concat (downcase (symbol-name val))
|
|
|
1745 "-mode"))))
|
|
|
1746 ((memq var ignored-local-variables)
|
|
|
1747 nil)
|
|
|
1748 ;; "Setting" eval means either eval it or do nothing.
|
|
|
1749 ;; Likewise for setting hook variables.
|
|
|
1750 ((or (get var 'risky-local-variable)
|
|
|
1751 (and
|
|
|
1752 (string-match "-hooks?$\\|-functions?$\\|-forms?$\\|-program$\\|-command$"
|
|
|
1753 (symbol-name var))
|
|
|
1754 (not (get var 'safe-local-variable))))
|
|
|
1755 ; ;; Permit evaling a put of a harmless property
|
|
|
1756 ; ;; if the args do nothing tricky.
|
|
|
1757 ; (if (or (and (eq var 'eval)
|
|
|
1758 ; (consp val)
|
|
|
1759 ; (eq (car val) 'put)
|
|
|
1760 ; (hack-one-local-variable-quotep (nth 1 val))
|
|
|
1761 ; (hack-one-local-variable-quotep (nth 2 val))
|
|
|
1762 ; ;; Only allow safe values of lisp-indent-hook;
|
|
|
1763 ; ;; not functions.
|
|
|
1764 ; (or (numberp (nth 3 val))
|
|
|
1765 ; (equal (nth 3 val) ''defun))
|
|
|
1766 ; (memq (nth 1 (nth 2 val))
|
|
|
1767 ; '(lisp-indent-hook)))
|
|
|
1768 (if (and (not (zerop (user-uid)))
|
|
|
1769 (or (eq enable-local-eval t)
|
|
|
1770 (and enable-local-eval
|
|
|
1771 (save-window-excursion
|
|
|
1772 (switch-to-buffer (current-buffer))
|
|
|
1773 (save-excursion
|
|
|
1774 (beginning-of-line)
|
|
|
1775 (set-window-start (selected-window) (point)))
|
|
|
1776 (setq enable-local-eval
|
|
|
1777 (y-or-n-p (format "Process `eval' or hook local variables in file %s? "
|
|
|
1778 (file-name-nondirectory buffer-file-name))))))))
|
|
|
1779 (if (eq var 'eval)
|
|
|
1780 (save-excursion (eval val))
|
|
|
1781 (make-local-variable var)
|
|
|
1782 (set var val))
|
|
|
1783 (message "Ignoring `eval:' in file's local variables")))
|
|
|
1784 ;; Ordinary variable, really set it.
|
|
|
1785 (t (make-local-variable var)
|
|
|
1786 (set var val))))
|
|
502
|
1787
|
|
|
1788 (defun find-coding-system-magic-cookie-in-file (file)
|
|
|
1789 "Look for the coding-system magic cookie in FILE.
|
|
|
1790 The coding-system magic cookie is either the local variable specification
|
|
|
1791 -*- ... coding: ... -*- on the first line, or the exact string
|
|
|
1792 \";;;###coding system: \" somewhere within the first 3000 characters
|
|
|
1793 of the file. If found, the coding system name (as a string) is returned;
|
|
|
1794 otherwise nil is returned. Note that it is extremely unlikely that
|
|
|
1795 either such string would occur coincidentally as the result of encoding
|
|
|
1796 some characters in a non-ASCII charset, and that the spaces make it
|
|
|
1797 even less likely since the space character is not a valid octet in any
|
|
|
1798 ISO 2022 encoding of most non-ASCII charsets."
|
|
|
1799 (save-excursion
|
|
|
1800 (with-temp-buffer
|
|
|
1801 (let ((coding-system-for-read 'raw-text))
|
|
|
1802 (insert-file-contents file nil 1 3001))
|
|
|
1803 (goto-char (point-min))
|
|
|
1804 (or (and (looking-at
|
|
|
1805 "^[^\n]*-\\*-[^\n]*coding: \\([^ \t\n;]+\\)[^\n]*-\\*-")
|
|
|
1806 (buffer-substring (match-beginning 1) (match-end 1)))
|
|
|
1807 ;; (save-excursion
|
|
|
1808 ;; (let (start end)
|
|
|
1809 ;; (and (re-search-forward "^;+[ \t]*Local Variables:" nil t)
|
|
|
1810 ;; (setq start (match-end 0))
|
|
|
1811 ;; (re-search-forward "\n;+[ \t]*End:")
|
|
|
1812 ;; (setq end (match-beginning 0))
|
|
|
1813 ;; (save-restriction
|
|
|
1814 ;; (narrow-to-region start end)
|
|
|
1815 ;; (goto-char start)
|
|
|
1816 ;; (re-search-forward "^;;; coding: \\([^\n]+\\)$" nil t)
|
|
|
1817 ;; )
|
|
|
1818 ;; (let ((codesys
|
|
|
1819 ;; (intern (buffer-substring
|
|
|
1820 ;; (match-beginning 1)(match-end 1)))))
|
|
|
1821 ;; (if (find-coding-system codesys) codesys))
|
|
|
1822 ;; )))
|
|
|
1823 (let ((case-fold-search nil))
|
|
|
1824 (if (search-forward
|
|
|
1825 ";;;###coding system: " (+ (point-min) 3000) t)
|
|
|
1826 (let ((start (point))
|
|
|
1827 (end (progn
|
|
|
1828 (skip-chars-forward "^ \t\n\r")
|
|
|
1829 (point))))
|
|
|
1830 (if (> end start) (buffer-substring start end))
|
|
|
1831 )))
|
|
|
1832 ))))
|
|
428
|
1833
|
|
|
1834 (defcustom change-major-mode-with-file-name t
|
|
|
1835 "*Non-nil means \\[write-file] should set the major mode from the file name.
|
|
|
1836 However, the mode will not be changed if
|
|
|
1837 \(1) a local variables list or the `-*-' line specifies a major mode, or
|
|
|
1838 \(2) the current major mode is a \"special\" mode,
|
|
|
1839 \ not suitable for ordinary files, or
|
|
|
1840 \(3) the new file name does not particularly specify any mode."
|
|
|
1841 :type 'boolean
|
|
|
1842 :group 'editing-basics)
|
|
|
1843
|
|
|
1844 (defun set-visited-file-name (filename &optional no-query along-with-file)
|
|
|
1845 "Change name of file visited in current buffer to FILENAME.
|
|
|
1846 The next time the buffer is saved it will go in the newly specified file.
|
|
|
1847 nil or empty string as argument means make buffer not be visiting any file.
|
|
|
1848 Remember to delete the initial contents of the minibuffer
|
|
|
1849 if you wish to pass an empty string as the argument.
|
|
|
1850
|
|
|
1851 The optional second argument NO-QUERY, if non-nil, inhibits asking for
|
|
|
1852 confirmation in the case where another buffer is already visiting FILENAME.
|
|
|
1853
|
|
|
1854 The optional third argument ALONG-WITH-FILE, if non-nil, means that
|
|
|
1855 the old visited file has been renamed to the new name FILENAME."
|
|
|
1856 (interactive "FSet visited file name: ")
|
|
|
1857 (if (buffer-base-buffer)
|
|
|
1858 (error "An indirect buffer cannot visit a file"))
|
|
|
1859 (let (truename)
|
|
|
1860 (if filename
|
|
|
1861 (setq filename
|
|
|
1862 (if (string-equal filename "")
|
|
|
1863 nil
|
|
|
1864 (expand-file-name filename))))
|
|
|
1865 (if filename
|
|
|
1866 (progn
|
|
|
1867 (setq truename (file-truename filename))
|
|
|
1868 ;; #### Do we need to check if truename is non-nil?
|
|
|
1869 (if find-file-use-truenames
|
|
|
1870 (setq filename truename))))
|
|
|
1871 (let ((buffer (and filename (find-buffer-visiting filename))))
|
|
|
1872 (and buffer (not (eq buffer (current-buffer)))
|
|
|
1873 (not no-query)
|
|
|
1874 (not (y-or-n-p (message "A buffer is visiting %s; proceed? "
|
|
|
1875 filename)))
|
|
|
1876 (error "Aborted")))
|
|
|
1877 (or (equal filename buffer-file-name)
|
|
|
1878 (progn
|
|
|
1879 (and filename (lock-buffer filename))
|
|
|
1880 (unlock-buffer)))
|
|
|
1881 (setq buffer-file-name filename)
|
|
|
1882 (if filename ; make buffer name reflect filename.
|
|
|
1883 (let ((new-name (file-name-nondirectory buffer-file-name)))
|
|
|
1884 (if (string= new-name "")
|
|
|
1885 (error "Empty file name"))
|
|
|
1886 (setq default-directory (file-name-directory buffer-file-name))
|
|
|
1887 (or (string= new-name (buffer-name))
|
|
|
1888 (rename-buffer new-name t))))
|
|
|
1889 (setq buffer-backed-up nil)
|
|
|
1890 (or along-with-file
|
|
|
1891 (clear-visited-file-modtime))
|
|
|
1892 (compute-buffer-file-truename) ; insert-file-contents does this too.
|
|
|
1893 ; ;; Abbreviate the file names of the buffer.
|
|
|
1894 ; (if truename
|
|
|
1895 ; (progn
|
|
|
1896 ; (setq buffer-file-truename (abbreviate-file-name truename))
|
|
|
1897 ; (if find-file-visit-truename
|
|
|
1898 ; (setq buffer-file-name buffer-file-truename))))
|
|
|
1899 (setq buffer-file-number
|
|
|
1900 (if filename
|
|
|
1901 (nthcdr 10 (file-attributes buffer-file-name))
|
|
|
1902 nil)))
|
|
|
1903 ;; write-file-hooks is normally used for things like ftp-find-file
|
|
|
1904 ;; that visit things that are not local files as if they were files.
|
|
|
1905 ;; Changing to visit an ordinary local file instead should flush the hook.
|
|
|
1906 (kill-local-variable 'write-file-hooks)
|
|
|
1907 (kill-local-variable 'after-save-hook)
|
|
|
1908 (kill-local-variable 'local-write-file-hooks)
|
|
|
1909 (kill-local-variable 'write-file-data-hooks)
|
|
|
1910 (kill-local-variable 'revert-buffer-function)
|
|
|
1911 (kill-local-variable 'backup-inhibited)
|
|
|
1912 ;; If buffer was read-only because of version control,
|
|
|
1913 ;; that reason is gone now, so make it writable.
|
|
502
|
1914 (if-boundp 'vc-mode
|
|
|
1915 (progn
|
|
|
1916 (if vc-mode
|
|
|
1917 (setq buffer-read-only nil))
|
|
|
1918 (kill-local-variable 'vc-mode)))
|
|
428
|
1919 ;; Turn off backup files for certain file names.
|
|
|
1920 ;; Since this is a permanent local, the major mode won't eliminate it.
|
|
|
1921 (and buffer-file-name
|
|
|
1922 (not (funcall backup-enable-predicate buffer-file-name))
|
|
|
1923 (progn
|
|
|
1924 (make-local-variable 'backup-inhibited)
|
|
|
1925 (setq backup-inhibited t)))
|
|
|
1926 (let ((oauto buffer-auto-save-file-name))
|
|
|
1927 ;; If auto-save was not already on, turn it on if appropriate.
|
|
|
1928 (if (not buffer-auto-save-file-name)
|
|
|
1929 (and buffer-file-name auto-save-default
|
|
|
1930 (auto-save-mode t))
|
|
|
1931 ;; If auto save is on, start using a new name.
|
|
|
1932 ;; We deliberately don't rename or delete the old auto save
|
|
|
1933 ;; for the old visited file name. This is because perhaps
|
|
|
1934 ;; the user wants to save the new state and then compare with the
|
|
|
1935 ;; previous state from the auto save file.
|
|
|
1936 (setq buffer-auto-save-file-name
|
|
|
1937 (make-auto-save-file-name)))
|
|
|
1938 ;; Rename the old auto save file if any.
|
|
|
1939 (and oauto buffer-auto-save-file-name
|
|
|
1940 (file-exists-p oauto)
|
|
|
1941 (rename-file oauto buffer-auto-save-file-name t)))
|
|
|
1942 (if buffer-file-name
|
|
|
1943 (not along-with-file)
|
|
|
1944 (set-buffer-modified-p t))
|
|
|
1945 ;; Update the major mode, if the file name determines it.
|
|
|
1946 (condition-case nil
|
|
|
1947 ;; Don't change the mode if it is special.
|
|
|
1948 (or (not change-major-mode-with-file-name)
|
|
|
1949 (get major-mode 'mode-class)
|
|
|
1950 ;; Don't change the mode if the local variable list specifies it.
|
|
|
1951 (hack-local-variables t)
|
|
|
1952 (set-auto-mode t))
|
|
|
1953 (error nil))
|
|
|
1954 ;; #### ??
|
|
|
1955 (run-hooks 'after-set-visited-file-name-hooks))
|
|
|
1956
|
|
|
1957 (defun write-file (filename &optional confirm codesys)
|
|
|
1958 "Write current buffer into file FILENAME.
|
|
771
|
1959 Makes buffer visit that file, and marks it not modified. If the buffer is
|
|
|
1960 already visiting a file, you can specify a directory name as FILENAME, to
|
|
|
1961 write a file of the same old name in that directory.
|
|
|
1962
|
|
|
1963 If optional second arg CONFIRM is non-nil, ask for confirmation for
|
|
|
1964 overwriting an existing file.
|
|
|
1965
|
|
|
1966 Optional third argument specifies the coding system to use when encoding
|
|
|
1967 the file. Interactively, with a prefix argument, you will be prompted for
|
|
|
1968 the coding system."
|
|
428
|
1969 ;; (interactive "FWrite file: ")
|
|
|
1970 (interactive
|
|
|
1971 (list (if buffer-file-name
|
|
|
1972 (read-file-name "Write file: "
|
|
|
1973 nil nil nil nil)
|
|
|
1974 (read-file-name "Write file: "
|
|
|
1975 (cdr (assq 'default-directory
|
|
|
1976 (buffer-local-variables)))
|
|
|
1977 nil nil (buffer-name)))
|
|
|
1978 t
|
|
771
|
1979 (if current-prefix-arg (read-coding-system "Coding system: "))))
|
|
428
|
1980 (and (eq (current-buffer) mouse-grabbed-buffer)
|
|
|
1981 (error "Can't write minibuffer window"))
|
|
|
1982 (or (null filename) (string-equal filename "")
|
|
|
1983 (progn
|
|
|
1984 ;; If arg is just a directory,
|
|
|
1985 ;; use same file name, but in that directory.
|
|
|
1986 (if (and (file-directory-p filename) buffer-file-name)
|
|
|
1987 (setq filename (concat (file-name-as-directory filename)
|
|
|
1988 (file-name-nondirectory buffer-file-name))))
|
|
|
1989 (and confirm
|
|
|
1990 (file-exists-p filename)
|
|
|
1991 (or (y-or-n-p (format "File `%s' exists; overwrite? " filename))
|
|
|
1992 (error "Canceled")))
|
|
|
1993 (set-visited-file-name filename)))
|
|
|
1994 (set-buffer-modified-p t)
|
|
|
1995 (setq buffer-read-only nil)
|
|
|
1996 (if codesys
|
|
|
1997 (let ((buffer-file-coding-system (get-coding-system codesys)))
|
|
|
1998 (save-buffer))
|
|
|
1999 (save-buffer)))
|
|
|
2000
|
|
|
2001 (defun backup-buffer ()
|
|
|
2002 "Make a backup of the disk file visited by the current buffer, if appropriate.
|
|
|
2003 This is normally done before saving the buffer the first time.
|
|
|
2004 If the value is non-nil, it is the result of `file-modes' on the original file;
|
|
|
2005 this means that the caller, after saving the buffer, should change the modes
|
|
|
2006 of the new file to agree with the old modes."
|
|
|
2007 (if buffer-file-name
|
|
|
2008 (let ((handler (find-file-name-handler buffer-file-name 'backup-buffer)))
|
|
|
2009 (if handler
|
|
|
2010 (funcall handler 'backup-buffer)
|
|
|
2011 (if (and make-backup-files
|
|
|
2012 (not backup-inhibited)
|
|
|
2013 (not buffer-backed-up)
|
|
|
2014 (file-exists-p buffer-file-name)
|
|
|
2015 (memq (aref (elt (file-attributes buffer-file-name) 8) 0)
|
|
|
2016 '(?- ?l)))
|
|
|
2017 (let ((real-file-name buffer-file-name)
|
|
|
2018 backup-info backupname targets setmodes)
|
|
|
2019 ;; If specified name is a symbolic link, chase it to the target.
|
|
|
2020 ;; Thus we make the backups in the directory where the real file is.
|
|
|
2021 (setq real-file-name (file-chase-links real-file-name))
|
|
|
2022 (setq backup-info (find-backup-file-name real-file-name)
|
|
|
2023 backupname (car backup-info)
|
|
|
2024 targets (cdr backup-info))
|
|
|
2025 ;;; (if (file-directory-p buffer-file-name)
|
|
|
2026 ;;; (error "Cannot save buffer in directory %s" buffer-file-name))
|
|
|
2027 (if backup-info
|
|
|
2028 (condition-case ()
|
|
|
2029 (let ((delete-old-versions
|
|
|
2030 ;; If have old versions to maybe delete,
|
|
|
2031 ;; ask the user to confirm now, before doing anything.
|
|
440
|
2032 ;; But don't actually delete till later.
|
|
428
|
2033 (and targets
|
|
|
2034 (or (eq delete-old-versions t)
|
|
|
2035 (eq delete-old-versions nil))
|
|
|
2036 (or delete-old-versions
|
|
|
2037 (y-or-n-p (format "Delete excess backup versions of %s? "
|
|
|
2038 real-file-name))))))
|
|
|
2039 ;; Actually write the back up file.
|
|
|
2040 (condition-case ()
|
|
|
2041 (if (or file-precious-flag
|
|
|
2042 ; (file-symlink-p buffer-file-name)
|
|
|
2043 backup-by-copying
|
|
|
2044 (and backup-by-copying-when-linked
|
|
|
2045 (> (file-nlinks real-file-name) 1))
|
|
|
2046 (and backup-by-copying-when-mismatch
|
|
|
2047 (let ((attr (file-attributes real-file-name)))
|
|
|
2048 (or (nth 9 attr)
|
|
|
2049 (not (file-ownership-preserved-p real-file-name))))))
|
|
|
2050 (condition-case ()
|
|
|
2051 (copy-file real-file-name backupname t t)
|
|
|
2052 (file-error
|
|
|
2053 ;; If copying fails because file BACKUPNAME
|
|
|
2054 ;; is not writable, delete that file and try again.
|
|
|
2055 (if (and (file-exists-p backupname)
|
|
|
2056 (not (file-writable-p backupname)))
|
|
|
2057 (delete-file backupname))
|
|
|
2058 (copy-file real-file-name backupname t t)))
|
|
|
2059 ;; rename-file should delete old backup.
|
|
|
2060 (rename-file real-file-name backupname t)
|
|
|
2061 (setq setmodes (file-modes backupname)))
|
|
|
2062 (file-error
|
|
|
2063 ;; If trouble writing the backup, write it in ~.
|
|
464
|
2064 (setq backupname
|
|
|
2065 (expand-file-name
|
|
|
2066 (convert-standard-filename "~/%backup%~")))
|
|
793
|
2067 (lwarn 'file 'alert "Cannot write backup file; backing up in ~/%%backup%%~")
|
|
428
|
2068 (sleep-for 1)
|
|
|
2069 (condition-case ()
|
|
|
2070 (copy-file real-file-name backupname t t)
|
|
|
2071 (file-error
|
|
|
2072 ;; If copying fails because file BACKUPNAME
|
|
|
2073 ;; is not writable, delete that file and try again.
|
|
|
2074 (if (and (file-exists-p backupname)
|
|
|
2075 (not (file-writable-p backupname)))
|
|
|
2076 (delete-file backupname))
|
|
|
2077 (copy-file real-file-name backupname t t)))))
|
|
|
2078 (setq buffer-backed-up t)
|
|
|
2079 ;; Now delete the old versions, if desired.
|
|
|
2080 (if delete-old-versions
|
|
|
2081 (while targets
|
|
|
2082 (ignore-file-errors (delete-file (car targets)))
|
|
|
2083 (setq targets (cdr targets))))
|
|
|
2084 setmodes)
|
|
|
2085 (file-error nil)))))))))
|
|
|
2086
|
|
|
2087 (defun file-name-sans-versions (name &optional keep-backup-version)
|
|
|
2088 "Return FILENAME sans backup versions or strings.
|
|
|
2089 This is a separate procedure so your site-init or startup file can
|
|
|
2090 redefine it.
|
|
|
2091 If the optional argument KEEP-BACKUP-VERSION is non-nil,
|
|
|
2092 we do not remove backup version numbers, only true file version numbers."
|
|
|
2093 (let ((handler (find-file-name-handler name 'file-name-sans-versions)))
|
|
|
2094 (if handler
|
|
|
2095 (funcall handler 'file-name-sans-versions name keep-backup-version)
|
|
|
2096 (substring name 0
|
|
|
2097 (if keep-backup-version
|
|
|
2098 (length name)
|
|
|
2099 (or (string-match "\\.~[0-9.]+~\\'" name)
|
|
|
2100 ;; XEmacs - VC uses extensions like ".~tagname~" or ".~1.1.5.2~"
|
|
|
2101 (let ((pos (string-match "\\.~\\([^.~ \t]+\\|[0-9.]+\\)~\\'" name)))
|
|
|
2102 (and pos
|
|
|
2103 ;; #### - is this filesystem check too paranoid?
|
|
|
2104 (file-exists-p (substring name 0 pos))
|
|
|
2105 pos))
|
|
|
2106 (string-match "~\\'" name)
|
|
|
2107 (length name)))))))
|
|
|
2108
|
|
|
2109 (defun file-ownership-preserved-p (file)
|
|
|
2110 "Return t if deleting FILE and rewriting it would preserve the owner."
|
|
|
2111 (let ((handler (find-file-name-handler file 'file-ownership-preserved-p)))
|
|
|
2112 (if handler
|
|
|
2113 (funcall handler 'file-ownership-preserved-p file)
|
|
|
2114 (let ((attributes (file-attributes file)))
|
|
|
2115 ;; Return t if the file doesn't exist, since it's true that no
|
|
|
2116 ;; information would be lost by an (attempted) delete and create.
|
|
|
2117 (or (null attributes)
|
|
|
2118 (= (nth 2 attributes) (user-uid)))))))
|
|
|
2119
|
|
|
2120 (defun file-name-sans-extension (filename)
|
|
|
2121 "Return FILENAME sans final \"extension\".
|
|
|
2122 The extension, in a file name, is the part that follows the last `.'."
|
|
|
2123 (save-match-data
|
|
|
2124 (let ((file (file-name-sans-versions (file-name-nondirectory filename)))
|
|
|
2125 directory)
|
|
|
2126 (if (string-match "\\.[^.]*\\'" file)
|
|
|
2127 (if (setq directory (file-name-directory filename))
|
|
|
2128 (expand-file-name (substring file 0 (match-beginning 0))
|
|
|
2129 directory)
|
|
|
2130 (substring file 0 (match-beginning 0)))
|
|
|
2131 filename))))
|
|
|
2132
|
|
|
2133 (defun file-name-extension (filename &optional period)
|
|
|
2134 "Return FILENAME's final \"extension\".
|
|
|
2135 The extension, in a file name, is the part that follows the last `.'.
|
|
|
2136 Return nil for extensionless file names such as `foo'.
|
|
|
2137 Return the empty string for file names such as `foo.'.
|
|
|
2138
|
|
|
2139 If PERIOD is non-nil, then the returned value includes the period
|
|
|
2140 that delimits the extension, and if FILENAME has no extension,
|
|
|
2141 the value is \"\"."
|
|
|
2142 (save-match-data
|
|
|
2143 (let ((file (file-name-sans-versions (file-name-nondirectory filename))))
|
|
|
2144 (if (string-match "\\.[^.]*\\'" file)
|
|
|
2145 (substring file (+ (match-beginning 0) (if period 0 1)))
|
|
|
2146 (if period
|
|
|
2147 "")))))
|
|
|
2148
|
|
|
2149 (defun make-backup-file-name (file)
|
|
|
2150 "Create the non-numeric backup file name for FILE.
|
|
|
2151 This is a separate function so you can redefine it for customization."
|
|
464
|
2152 ;; FSF has code here for MS-DOS short filenames, not supported in XEmacs.
|
|
440
|
2153 (concat file "~"))
|
|
428
|
2154
|
|
|
2155 (defun backup-file-name-p (file)
|
|
|
2156 "Return non-nil if FILE is a backup file name (numeric or not).
|
|
|
2157 This is a separate function so you can redefine it for customization.
|
|
|
2158 You may need to redefine `file-name-sans-versions' as well."
|
|
440
|
2159 (string-match "~\\'" file))
|
|
428
|
2160
|
|
|
2161 ;; This is used in various files.
|
|
|
2162 ;; The usage of bv-length is not very clean,
|
|
|
2163 ;; but I can't see a good alternative,
|
|
|
2164 ;; so as of now I am leaving it alone.
|
|
|
2165 (defun backup-extract-version (fn)
|
|
|
2166 "Given the name of a numeric backup file, return the backup number.
|
|
|
2167 Uses the free variable `bv-length', whose value should be
|
|
|
2168 the index in the name where the version number begins."
|
|
|
2169 (declare (special bv-length))
|
|
|
2170 (if (and (string-match "[0-9]+~\\'" fn bv-length)
|
|
|
2171 (= (match-beginning 0) bv-length))
|
|
|
2172 (string-to-int (substring fn bv-length -1))
|
|
|
2173 0))
|
|
|
2174
|
|
|
2175 (defun find-backup-file-name (fn)
|
|
|
2176 "Find a file name for a backup file, and suggestions for deletions.
|
|
|
2177 Value is a list whose car is the name for the backup file
|
|
|
2178 and whose cdr is a list of old versions to consider deleting now.
|
|
|
2179 If the value is nil, don't make a backup."
|
|
464
|
2180 (declare (special bv-length))
|
|
428
|
2181 (let ((handler (find-file-name-handler fn 'find-backup-file-name)))
|
|
|
2182 ;; Run a handler for this function so that ange-ftp can refuse to do it.
|
|
|
2183 (if handler
|
|
|
2184 (funcall handler 'find-backup-file-name fn)
|
|
|
2185 (if (eq version-control 'never)
|
|
|
2186 (list (make-backup-file-name fn))
|
|
|
2187 (let* ((base-versions (concat (file-name-nondirectory fn) ".~"))
|
|
|
2188 ;; used by backup-extract-version:
|
|
|
2189 (bv-length (length base-versions))
|
|
|
2190 possibilities
|
|
|
2191 (versions nil)
|
|
|
2192 (high-water-mark 0)
|
|
|
2193 (deserve-versions-p nil)
|
|
|
2194 (number-to-delete 0))
|
|
|
2195 (condition-case ()
|
|
|
2196 (setq possibilities (file-name-all-completions
|
|
|
2197 base-versions
|
|
|
2198 (file-name-directory fn))
|
|
|
2199 versions (sort (mapcar
|
|
|
2200 #'backup-extract-version
|
|
|
2201 possibilities)
|
|
|
2202 '<)
|
|
|
2203 high-water-mark (apply #'max 0 versions)
|
|
|
2204 deserve-versions-p (or version-control
|
|
|
2205 (> high-water-mark 0))
|
|
|
2206 number-to-delete (- (length versions)
|
|
|
2207 kept-old-versions kept-new-versions -1))
|
|
|
2208 (file-error
|
|
|
2209 (setq possibilities nil)))
|
|
|
2210 (if (not deserve-versions-p)
|
|
|
2211 (list (make-backup-file-name fn))
|
|
|
2212 (cons (concat fn ".~" (int-to-string (1+ high-water-mark)) "~")
|
|
|
2213 (if (and (> number-to-delete 0)
|
|
|
2214 ;; Delete nothing if there is overflow
|
|
|
2215 ;; in the number of versions to keep.
|
|
|
2216 (>= (+ kept-new-versions kept-old-versions -1) 0))
|
|
|
2217 (mapcar #'(lambda (n)
|
|
|
2218 (concat fn ".~" (int-to-string n) "~"))
|
|
|
2219 (let ((v (nthcdr kept-old-versions versions)))
|
|
|
2220 (rplacd (nthcdr (1- number-to-delete) v) ())
|
|
|
2221 v))))))))))
|
|
|
2222
|
|
|
2223 (defun file-nlinks (filename)
|
|
|
2224 "Return number of names file FILENAME has."
|
|
|
2225 (car (cdr (file-attributes filename))))
|
|
|
2226
|
|
|
2227 (defun file-relative-name (filename &optional directory)
|
|
|
2228 "Convert FILENAME to be relative to DIRECTORY (default: default-directory).
|
|
|
2229 This function returns a relative file name which is equivalent to FILENAME
|
|
|
2230 when used with that default directory as the default.
|
|
442
|
2231 If this is impossible (which can happen on MS Windows when the file name
|
|
|
2232 and directory use different drive names) then it returns FILENAME."
|
|
428
|
2233 (save-match-data
|
|
|
2234 (let ((fname (expand-file-name filename)))
|
|
|
2235 (setq directory (file-name-as-directory
|
|
|
2236 (expand-file-name (or directory default-directory))))
|
|
|
2237 ;; On Microsoft OSes, if FILENAME and DIRECTORY have different
|
|
|
2238 ;; drive names, they can't be relative, so return the absolute name.
|
|
440
|
2239 (if (and (eq system-type 'windows-nt)
|
|
428
|
2240 (not (string-equal (substring fname 0 2)
|
|
|
2241 (substring directory 0 2))))
|
|
|
2242 filename
|
|
|
2243 (let ((ancestor ".")
|
|
|
2244 (fname-dir (file-name-as-directory fname)))
|
|
|
2245 (while (and (not (string-match (concat "^" (regexp-quote directory))
|
|
|
2246 fname-dir))
|
|
|
2247 (not (string-match (concat "^" (regexp-quote directory)) fname)))
|
|
|
2248 (setq directory (file-name-directory (substring directory 0 -1))
|
|
|
2249 ancestor (if (equal ancestor ".")
|
|
|
2250 ".."
|
|
|
2251 (concat "../" ancestor))))
|
|
|
2252 ;; Now ancestor is empty, or .., or ../.., etc.
|
|
|
2253 (if (string-match (concat "^" (regexp-quote directory)) fname)
|
|
|
2254 ;; We matched within FNAME's directory part.
|
|
|
2255 ;; Add the rest of FNAME onto ANCESTOR.
|
|
|
2256 (let ((rest (substring fname (match-end 0))))
|
|
|
2257 (if (and (equal ancestor ".")
|
|
|
2258 (not (equal rest "")))
|
|
|
2259 ;; But don't bother with ANCESTOR if it would give us `./'.
|
|
|
2260 rest
|
|
|
2261 (concat (file-name-as-directory ancestor) rest)))
|
|
|
2262 ;; We matched FNAME's directory equivalent.
|
|
|
2263 ancestor))))))
|
|
|
2264
|
|
|
2265 (defun save-buffer (&optional args)
|
|
|
2266 "Save current buffer in visited file if modified. Versions described below.
|
|
|
2267
|
|
|
2268 By default, makes the previous version into a backup file
|
|
|
2269 if previously requested or if this is the first save.
|
|
|
2270 With 1 or 3 \\[universal-argument]'s, marks this version
|
|
|
2271 to become a backup when the next save is done.
|
|
|
2272 With 2 or 3 \\[universal-argument]'s,
|
|
|
2273 unconditionally makes the previous version into a backup file.
|
|
|
2274 With argument of 0, never makes the previous version into a backup file.
|
|
|
2275
|
|
|
2276 If a file's name is FOO, the names of its numbered backup versions are
|
|
|
2277 FOO.~i~ for various integers i. A non-numbered backup file is called FOO~.
|
|
|
2278 Numeric backups (rather than FOO~) will be made if value of
|
|
|
2279 `version-control' is not the atom `never' and either there are already
|
|
|
2280 numeric versions of the file being backed up, or `version-control' is
|
|
|
2281 non-nil.
|
|
|
2282 We don't want excessive versions piling up, so there are variables
|
|
|
2283 `kept-old-versions', which tells XEmacs how many oldest versions to keep,
|
|
|
2284 and `kept-new-versions', which tells how many newest versions to keep.
|
|
|
2285 Defaults are 2 old versions and 2 new.
|
|
|
2286 `dired-kept-versions' controls dired's clean-directory (.) command.
|
|
|
2287 If `delete-old-versions' is nil, system will query user
|
|
|
2288 before trimming versions. Otherwise it does it silently."
|
|
|
2289 (interactive "_p")
|
|
|
2290 (let ((modp (buffer-modified-p))
|
|
|
2291 (large (> (buffer-size) 50000))
|
|
|
2292 (make-backup-files (or (and make-backup-files (not (eq args 0)))
|
|
|
2293 (memq args '(16 64)))))
|
|
|
2294 (and modp (memq args '(16 64)) (setq buffer-backed-up nil))
|
|
|
2295 (if (and modp large) (display-message
|
|
|
2296 'progress (format "Saving file %s..."
|
|
|
2297 (buffer-file-name))))
|
|
|
2298 (basic-save-buffer)
|
|
|
2299 (and modp (memq args '(4 64)) (setq buffer-backed-up nil))))
|
|
|
2300
|
|
|
2301 (defun delete-auto-save-file-if-necessary (&optional force)
|
|
|
2302 "Delete auto-save file for current buffer if `delete-auto-save-files' is t.
|
|
|
2303 Normally delete only if the file was written by this XEmacs
|
|
|
2304 since the last real save, but optional arg FORCE non-nil means delete anyway."
|
|
|
2305 (and buffer-auto-save-file-name delete-auto-save-files
|
|
|
2306 (not (string= buffer-file-name buffer-auto-save-file-name))
|
|
|
2307 (or force (recent-auto-save-p))
|
|
|
2308 (progn
|
|
|
2309 (ignore-file-errors (delete-file buffer-auto-save-file-name))
|
|
|
2310 (set-buffer-auto-saved))))
|
|
|
2311
|
|
|
2312 ;; XEmacs change (from Sun)
|
|
|
2313 ;; used to communicate with continue-save-buffer:
|
|
|
2314 (defvar continue-save-buffer-hooks-tail nil)
|
|
|
2315
|
|
|
2316 ;; Not in FSFmacs
|
|
|
2317 (defun basic-write-file-data (realname truename)
|
|
|
2318 ;; call the hooks until the bytes are put
|
|
|
2319 ;; call write-region as a last resort
|
|
|
2320 (let ((region-written nil)
|
|
|
2321 (hooks write-file-data-hooks))
|
|
|
2322 (while (and hooks (not region-written))
|
|
|
2323 (setq region-written (funcall (car hooks) realname)
|
|
|
2324 hooks (cdr hooks)))
|
|
|
2325 (if (not region-written)
|
|
|
2326 (write-region (point-min) (point-max) realname nil t truename))))
|
|
|
2327
|
|
|
2328 (put 'after-save-hook 'permanent-local t)
|
|
|
2329 (defvar after-save-hook nil
|
|
|
2330 "Normal hook that is run after a buffer is saved to its file.
|
|
|
2331 These hooks are considered to pertain to the visited file.
|
|
|
2332 So this list is cleared if you change the visited file name.")
|
|
|
2333
|
|
|
2334 (defun files-fetch-hook-value (hook)
|
|
|
2335 (let ((localval (symbol-value hook))
|
|
|
2336 (globalval (default-value hook)))
|
|
|
2337 (if (memq t localval)
|
|
|
2338 (setq localval (append (delq t localval) (delq t globalval))))
|
|
|
2339 localval))
|
|
|
2340
|
|
|
2341 (defun basic-save-buffer ()
|
|
|
2342 "Save the current buffer in its visited file, if it has been modified.
|
|
|
2343 After saving the buffer, run `after-save-hook'."
|
|
|
2344 (interactive)
|
|
|
2345 (save-excursion
|
|
|
2346 ;; In an indirect buffer, save its base buffer instead.
|
|
|
2347 (if (buffer-base-buffer)
|
|
|
2348 (set-buffer (buffer-base-buffer)))
|
|
|
2349 (if (buffer-modified-p)
|
|
|
2350 (let ((recent-save (recent-auto-save-p)))
|
|
|
2351 ;; If buffer has no file name, ask user for one.
|
|
|
2352 (or buffer-file-name
|
|
|
2353 (let ((filename
|
|
|
2354 (expand-file-name
|
|
|
2355 (read-file-name "File to save in: ") nil)))
|
|
|
2356 (and (file-exists-p filename)
|
|
|
2357 (or (y-or-n-p (format "File `%s' exists; overwrite? "
|
|
|
2358 filename))
|
|
|
2359 (error "Canceled")))
|
|
|
2360 (set-visited-file-name filename)))
|
|
|
2361 (or (verify-visited-file-modtime (current-buffer))
|
|
|
2362 (not (file-exists-p buffer-file-name))
|
|
|
2363 (yes-or-no-p
|
|
|
2364 (format "%s has changed since visited or saved. Save anyway? "
|
|
|
2365 (file-name-nondirectory buffer-file-name)))
|
|
|
2366 (error "Save not confirmed"))
|
|
|
2367 (save-restriction
|
|
|
2368 (widen)
|
|
434
|
2369
|
|
|
2370 ;; Add final newline if required. See `require-final-newline'.
|
|
|
2371 (when (and (not (eq (char-before (point-max)) ?\n)) ; common case
|
|
|
2372 (char-before (point-max)) ; empty buffer?
|
|
|
2373 (not (and (eq selective-display t)
|
|
|
2374 (eq (char-before (point-max)) ?\r)))
|
|
|
2375 (or (eq require-final-newline t)
|
|
|
2376 (and require-final-newline
|
|
|
2377 (y-or-n-p
|
|
|
2378 (format "Buffer %s does not end in newline. Add one? "
|
|
|
2379 (buffer-name))))))
|
|
|
2380 (save-excursion
|
|
|
2381 (goto-char (point-max))
|
|
|
2382 (insert ?\n)))
|
|
|
2383
|
|
444
|
2384 ;; Run the write-file-hooks until one returns non-nil.
|
|
428
|
2385 ;; Bind after-save-hook to nil while running the
|
|
|
2386 ;; write-file-hooks so that if this function is called
|
|
|
2387 ;; recursively (from inside a write-file-hook) the
|
|
|
2388 ;; after-hooks will only get run once (from the
|
|
|
2389 ;; outermost call).
|
|
|
2390 ;;
|
|
|
2391 ;; Ugh, have to duplicate logic of run-hook-with-args-until-success
|
|
|
2392 (let ((hooks (append (files-fetch-hook-value 'write-contents-hooks)
|
|
|
2393 (files-fetch-hook-value
|
|
|
2394 'local-write-file-hooks)
|
|
|
2395 (files-fetch-hook-value 'write-file-hooks)))
|
|
|
2396 (after-save-hook nil)
|
|
|
2397 (local-write-file-hooks nil)
|
|
|
2398 (write-contents-hooks nil)
|
|
|
2399 (write-file-hooks nil)
|
|
|
2400 done)
|
|
|
2401 (while (and hooks
|
|
|
2402 (let ((continue-save-buffer-hooks-tail hooks))
|
|
|
2403 (not (setq done (funcall (car hooks))))))
|
|
|
2404 (setq hooks (cdr hooks)))
|
|
|
2405 ;; If a hook returned t, file is already "written".
|
|
|
2406 ;; Otherwise, write it the usual way now.
|
|
|
2407 (if (not done)
|
|
|
2408 (basic-save-buffer-1)))
|
|
|
2409 ;; XEmacs: next two clauses (buffer-file-number setting and
|
|
|
2410 ;; set-file-modes) moved into basic-save-buffer-1.
|
|
|
2411 )
|
|
|
2412 ;; If the auto-save file was recent before this command,
|
|
|
2413 ;; delete it now.
|
|
|
2414 (delete-auto-save-file-if-necessary recent-save)
|
|
|
2415 ;; Support VC `implicit' locking.
|
|
502
|
2416 (if-fboundp 'vc-after-save
|
|
|
2417 (vc-after-save))
|
|
428
|
2418 (run-hooks 'after-save-hook))
|
|
|
2419 (display-message 'no-log "(No changes need to be saved)"))))
|
|
|
2420
|
|
|
2421 ;; This does the "real job" of writing a buffer into its visited file
|
|
|
2422 ;; and making a backup file. This is what is normally done
|
|
|
2423 ;; but inhibited if one of write-file-hooks returns non-nil.
|
|
|
2424 ;; It returns a value to store in setmodes.
|
|
|
2425 (defun basic-save-buffer-1 ()
|
|
|
2426 (let (setmodes tempsetmodes)
|
|
|
2427 (if (not (file-writable-p buffer-file-name))
|
|
|
2428 (let ((dir (file-name-directory buffer-file-name)))
|
|
|
2429 (if (not (file-directory-p dir))
|
|
|
2430 (error "%s is not a directory" dir)
|
|
|
2431 (if (not (file-exists-p buffer-file-name))
|
|
|
2432 (error "Directory %s write-protected" dir)
|
|
|
2433 (if (yes-or-no-p
|
|
|
2434 (format "File %s is write-protected; try to save anyway? "
|
|
|
2435 (file-name-nondirectory
|
|
|
2436 buffer-file-name)))
|
|
|
2437 (setq tempsetmodes t)
|
|
|
2438 (error
|
|
|
2439 "Attempt to save to a file which you aren't allowed to write"))))))
|
|
|
2440 (or buffer-backed-up
|
|
|
2441 (setq setmodes (backup-buffer)))
|
|
|
2442 (let ((dir (file-name-directory buffer-file-name)))
|
|
|
2443 (if (and file-precious-flag
|
|
|
2444 (file-writable-p dir))
|
|
|
2445 ;; If file is precious, write temp name, then rename it.
|
|
|
2446 ;; This requires write access to the containing dir,
|
|
|
2447 ;; which is why we don't try it if we don't have that access.
|
|
|
2448 (let ((realname buffer-file-name)
|
|
|
2449 tempname nogood i succeed
|
|
|
2450 (old-modtime (visited-file-modtime)))
|
|
|
2451 (setq i 0)
|
|
|
2452 (setq nogood t)
|
|
|
2453 ;; Find the temporary name to write under.
|
|
|
2454 (while nogood
|
|
|
2455 (setq tempname (format "%s#tmp#%d" dir i))
|
|
|
2456 (setq nogood (file-exists-p tempname))
|
|
|
2457 (setq i (1+ i)))
|
|
|
2458 (unwind-protect
|
|
|
2459 (progn (clear-visited-file-modtime)
|
|
|
2460 (write-region (point-min) (point-max)
|
|
|
2461 tempname nil realname
|
|
|
2462 buffer-file-truename)
|
|
|
2463 (setq succeed t))
|
|
|
2464 ;; If writing the temp file fails,
|
|
|
2465 ;; delete the temp file.
|
|
|
2466 (or succeed
|
|
|
2467 (progn
|
|
|
2468 (delete-file tempname)
|
|
|
2469 (set-visited-file-modtime old-modtime))))
|
|
|
2470 ;; Since we have created an entirely new file
|
|
|
2471 ;; and renamed it, make sure it gets the
|
|
|
2472 ;; right permission bits set.
|
|
|
2473 (setq setmodes (file-modes buffer-file-name))
|
|
|
2474 ;; We succeeded in writing the temp file,
|
|
|
2475 ;; so rename it.
|
|
|
2476 (rename-file tempname buffer-file-name t))
|
|
|
2477 ;; If file not writable, see if we can make it writable
|
|
|
2478 ;; temporarily while we write it.
|
|
|
2479 ;; But no need to do so if we have just backed it up
|
|
|
2480 ;; (setmodes is set) because that says we're superseding.
|
|
|
2481 (cond ((and tempsetmodes (not setmodes))
|
|
|
2482 ;; Change the mode back, after writing.
|
|
|
2483 (setq setmodes (file-modes buffer-file-name))
|
|
|
2484 (set-file-modes buffer-file-name 511)))
|
|
|
2485 (basic-write-file-data buffer-file-name buffer-file-truename)))
|
|
|
2486 (setq buffer-file-number
|
|
|
2487 (if buffer-file-name
|
|
|
2488 (nth 10 (file-attributes buffer-file-name))
|
|
|
2489 nil))
|
|
|
2490 (if setmodes
|
|
|
2491 (condition-case ()
|
|
|
2492 (set-file-modes buffer-file-name setmodes)
|
|
|
2493 (error nil)))))
|
|
|
2494
|
|
|
2495 ;; XEmacs change, from Sun
|
|
|
2496 (defun continue-save-buffer ()
|
|
|
2497 "Provide a clean way for a write-file-hook to wrap AROUND
|
|
|
2498 the execution of the remaining hooks and writing to disk.
|
|
|
2499 Do not call this function except from a functions
|
|
444
|
2500 on the `write-file-hooks' or `write-contents-hooks' list.
|
|
428
|
2501 A hook that calls this function must return non-nil,
|
|
444
|
2502 to signal completion to its caller. `continue-save-buffer'
|
|
428
|
2503 always returns non-nil."
|
|
|
2504 (let ((hooks (cdr (or continue-save-buffer-hooks-tail
|
|
|
2505 (error
|
|
|
2506 "continue-save-buffer called outside a write-file-hook!"))))
|
|
|
2507 (done nil))
|
|
|
2508 ;; Do something like this:
|
|
|
2509 ;; (let ((write-file-hooks hooks)) (basic-save-buffer))
|
|
|
2510 ;; First run the rest of the hooks.
|
|
|
2511 (while (and hooks
|
|
|
2512 (let ((continue-save-buffer-hooks-tail hooks))
|
|
|
2513 (not (setq done (funcall (car hooks))))))
|
|
|
2514 (setq hooks (cdr hooks)))
|
|
|
2515 ;;
|
|
|
2516 ;; If a hook returned t, file is already "written".
|
|
|
2517 (if (not done)
|
|
|
2518 (basic-save-buffer-1))
|
|
|
2519 'continue-save-buffer))
|
|
|
2520
|
|
|
2521 (defcustom save-some-buffers-query-display-buffer t
|
|
|
2522 "*Non-nil makes `\\[save-some-buffers]' switch to the buffer offered for saving."
|
|
|
2523 :type 'boolean
|
|
|
2524 :group 'editing-basics)
|
|
|
2525
|
|
|
2526 (defun save-some-buffers (&optional arg exiting)
|
|
|
2527 "Save some modified file-visiting buffers. Asks user about each one.
|
|
|
2528 Optional argument (the prefix) non-nil means save all with no questions.
|
|
|
2529 Optional second argument EXITING means ask about certain non-file buffers
|
|
|
2530 as well as about file buffers."
|
|
|
2531 (interactive "P")
|
|
|
2532 (save-excursion
|
|
|
2533 ;; `delete-other-windows' can bomb during autoloads generation, so
|
|
|
2534 ;; guard it well.
|
|
|
2535 (if (or noninteractive
|
|
|
2536 (eq (selected-window) (minibuffer-window))
|
|
|
2537 (not save-some-buffers-query-display-buffer))
|
|
|
2538 ;; If playing with windows is unsafe or undesired, just do the
|
|
|
2539 ;; usual drill.
|
|
|
2540 (save-some-buffers-1 arg exiting nil)
|
|
|
2541 ;; Else, protect the windows.
|
|
|
2542 (when (save-window-excursion
|
|
|
2543 (save-some-buffers-1 arg exiting t))
|
|
|
2544 ;; Force redisplay.
|
|
|
2545 (sit-for 0)))))
|
|
|
2546
|
|
|
2547 ;; XEmacs - do not use queried flag
|
|
|
2548 (defun save-some-buffers-1 (arg exiting switch-buffer)
|
|
|
2549 (let* ((switched nil)
|
|
612
|
2550 (last-buffer nil)
|
|
428
|
2551 (files-done
|
|
|
2552 (map-y-or-n-p
|
|
|
2553 (lambda (buffer)
|
|
612
|
2554 (prog1
|
|
|
2555 (and (buffer-modified-p buffer)
|
|
|
2556 (not (buffer-base-buffer buffer))
|
|
|
2557 ;; XEmacs addition:
|
|
|
2558 (not (symbol-value-in-buffer 'save-buffers-skip buffer))
|
|
|
2559 (or
|
|
|
2560 (buffer-file-name buffer)
|
|
|
2561 (and exiting
|
|
|
2562 (progn
|
|
|
2563 (set-buffer buffer)
|
|
|
2564 (and buffer-offer-save (> (buffer-size) 0)))))
|
|
|
2565 (if arg
|
|
|
2566 t
|
|
|
2567 ;; #### We should provide a per-buffer means to
|
|
|
2568 ;; disable the switching. For instance, you might
|
|
|
2569 ;; want to turn it off for buffers the contents of
|
|
|
2570 ;; which is meaningless to humans, such as
|
|
|
2571 ;; `.newsrc.eld'.
|
|
|
2572 (when (and switch-buffer
|
|
|
2573 ;; map-y-or-n-p is displaying help
|
|
|
2574 (not (eq last-buffer buffer)))
|
|
|
2575 (unless (one-window-p)
|
|
|
2576 (delete-other-windows))
|
|
|
2577 (setq switched t)
|
|
|
2578 ;; #### Consider using `display-buffer' here for 21.1!
|
|
|
2579 ;;(display-buffer buffer nil (selected-frame)))
|
|
|
2580 (switch-to-buffer buffer t))
|
|
|
2581 (if (buffer-file-name buffer)
|
|
|
2582 (format "Save file %s? "
|
|
|
2583 (buffer-file-name buffer))
|
|
|
2584 (format "Save buffer %s? "
|
|
|
2585 (buffer-name buffer)))))
|
|
|
2586 (setq last-buffer buffer)))
|
|
428
|
2587 (lambda (buffer)
|
|
|
2588 (set-buffer buffer)
|
|
|
2589 (condition-case ()
|
|
|
2590 (save-buffer)
|
|
|
2591 (error nil)))
|
|
|
2592 (buffer-list)
|
|
|
2593 '("buffer" "buffers" "save")
|
|
|
2594 ;;instead of this we just say "yes all", "no all", etc.
|
|
|
2595 ;;"save all the rest"
|
|
|
2596 ;;"save only this buffer" "save no more buffers")
|
|
|
2597 ;; this is rather bogus. --ben
|
|
|
2598 ;; (it makes the dialog box too big, and you get an error
|
|
|
2599 ;; "wrong type argument: framep, nil" when you hit q after
|
|
|
2600 ;; choosing the option from the dialog box)
|
|
|
2601
|
|
|
2602 ;; We should fix the dialog box rather than disabling
|
|
|
2603 ;; this! --hniksic
|
|
|
2604 (list (list ?\C-r (lambda (buf)
|
|
|
2605 ;; #### FSF has an EXIT-ACTION argument
|
|
|
2606 ;; to `view-buffer'.
|
|
|
2607 (view-buffer buf)
|
|
502
|
2608 (with-boundp 'view-exit-action
|
|
|
2609 (setq view-exit-action
|
|
|
2610 (lambda (ignore)
|
|
|
2611 (exit-recursive-edit))))
|
|
428
|
2612 (recursive-edit)
|
|
|
2613 ;; Return nil to ask about BUF again.
|
|
|
2614 nil)
|
|
442
|
2615 "%_Display Buffer"))))
|
|
428
|
2616 (abbrevs-done
|
|
|
2617 (and save-abbrevs abbrevs-changed
|
|
|
2618 (progn
|
|
|
2619 (if (or arg
|
|
|
2620 (y-or-n-p (format "Save abbrevs in %s? " abbrev-file-name)))
|
|
|
2621 (write-abbrev-file nil))
|
|
|
2622 ;; Don't keep bothering user if he says no.
|
|
|
2623 (setq abbrevs-changed nil)
|
|
|
2624 t))))
|
|
|
2625 (or (> files-done 0) abbrevs-done
|
|
|
2626 (display-message 'no-log "(No files need saving)"))
|
|
|
2627 switched))
|
|
|
2628
|
|
|
2629
|
|
|
2630 (defun not-modified (&optional arg)
|
|
|
2631 "Mark current buffer as unmodified, not needing to be saved.
|
|
|
2632 With prefix arg, mark buffer as modified, so \\[save-buffer] will save.
|
|
|
2633
|
|
|
2634 It is not a good idea to use this function in Lisp programs, because it
|
|
|
2635 prints a message in the minibuffer. Instead, use `set-buffer-modified-p'."
|
|
|
2636 (interactive "_P")
|
|
|
2637 (if arg ;; rewritten for I18N3 snarfing
|
|
|
2638 (display-message 'command "Modification-flag set")
|
|
|
2639 (display-message 'command "Modification-flag cleared"))
|
|
|
2640 (set-buffer-modified-p arg))
|
|
|
2641
|
|
|
2642 (defun toggle-read-only (&optional arg)
|
|
|
2643 "Toggle the current buffer's read-only status.
|
|
|
2644 With arg, set read-only iff arg is positive."
|
|
|
2645 (interactive "_P")
|
|
|
2646 (setq buffer-read-only
|
|
|
2647 (if (null arg)
|
|
|
2648 (not buffer-read-only)
|
|
|
2649 (> (prefix-numeric-value arg) 0)))
|
|
|
2650 ;; Force modeline redisplay
|
|
|
2651 (redraw-modeline))
|
|
|
2652
|
|
|
2653 (defun insert-file (filename &optional codesys)
|
|
|
2654 "Insert contents of file FILENAME into buffer after point.
|
|
|
2655 Set mark after the inserted text.
|
|
|
2656
|
|
771
|
2657 Optional second argument specifies the coding system to use when decoding
|
|
|
2658 the file. Interactively, with a prefix argument, you will be prompted for
|
|
|
2659 the coding system.
|
|
428
|
2660
|
|
771
|
2661 This function is meant for the user to run interactively. Don't call it
|
|
|
2662 from programs! Use `insert-file-contents' instead. \(Its calling sequence
|
|
|
2663 is different; see its documentation)."
|
|
428
|
2664 (interactive "*fInsert file: \nZCoding system: ")
|
|
|
2665 (if (file-directory-p filename)
|
|
|
2666 (signal 'file-error (list "Opening input file" "file is a directory"
|
|
|
2667 filename)))
|
|
|
2668 (let ((tem
|
|
|
2669 (if codesys
|
|
|
2670 (let ((coding-system-for-read
|
|
|
2671 (get-coding-system codesys)))
|
|
|
2672 (insert-file-contents filename))
|
|
|
2673 (insert-file-contents filename))))
|
|
|
2674 (push-mark (+ (point) (car (cdr tem))))))
|
|
|
2675
|
|
|
2676 (defun append-to-file (start end filename &optional codesys)
|
|
|
2677 "Append the contents of the region to the end of file FILENAME.
|
|
771
|
2678 When called from a function, expects three arguments, START, END and
|
|
|
2679 FILENAME. START and END are buffer positions saying what text to write.
|
|
|
2680 Optional fourth argument specifies the coding system to use when encoding
|
|
|
2681 the file. Interactively, with a prefix argument, you will be prompted for
|
|
|
2682 the coding system."
|
|
428
|
2683 (interactive "r\nFAppend to file: \nZCoding system: ")
|
|
|
2684 (if codesys
|
|
|
2685 (let ((buffer-file-coding-system (get-coding-system codesys)))
|
|
|
2686 (write-region start end filename t))
|
|
|
2687 (write-region start end filename t)))
|
|
|
2688
|
|
|
2689 (defun file-newest-backup (filename)
|
|
|
2690 "Return most recent backup file for FILENAME or nil if no backups exist."
|
|
|
2691 (let* ((filename (expand-file-name filename))
|
|
|
2692 (file (file-name-nondirectory filename))
|
|
|
2693 (dir (file-name-directory filename))
|
|
|
2694 (comp (file-name-all-completions file dir))
|
|
|
2695 newest)
|
|
|
2696 (while comp
|
|
|
2697 (setq file (concat dir (car comp))
|
|
|
2698 comp (cdr comp))
|
|
|
2699 (if (and (backup-file-name-p file)
|
|
|
2700 (or (null newest) (file-newer-than-file-p file newest)))
|
|
|
2701 (setq newest file)))
|
|
|
2702 newest))
|
|
|
2703
|
|
|
2704 (defun rename-uniquely ()
|
|
|
2705 "Rename current buffer to a similar name not already taken.
|
|
|
2706 This function is useful for creating multiple shell process buffers
|
|
|
2707 or multiple mail buffers, etc."
|
|
|
2708 (interactive)
|
|
|
2709 (save-match-data
|
|
|
2710 (let* ((base-name (if (and (string-match "<[0-9]+>\\'" (buffer-name))
|
|
|
2711 (not (and buffer-file-name
|
|
|
2712 (string= (buffer-name)
|
|
|
2713 (file-name-nondirectory
|
|
|
2714 buffer-file-name)))))
|
|
|
2715 ;; If the existing buffer name has a <NNN>,
|
|
|
2716 ;; which isn't part of the file name (if any),
|
|
|
2717 ;; then get rid of that.
|
|
|
2718 (substring (buffer-name) 0 (match-beginning 0))
|
|
|
2719 (buffer-name)))
|
|
|
2720 (new-buf (generate-new-buffer base-name))
|
|
|
2721 (name (buffer-name new-buf)))
|
|
|
2722 (kill-buffer new-buf)
|
|
|
2723 (rename-buffer name)
|
|
|
2724 (redraw-modeline))))
|
|
|
2725
|
|
|
2726 (defun make-directory-path (path)
|
|
|
2727 "Create all the directories along path that don't exist yet."
|
|
|
2728 (interactive "Fdirectory path to create: ")
|
|
|
2729 (make-directory path t))
|
|
|
2730
|
|
|
2731 (defun make-directory (dir &optional parents)
|
|
|
2732 "Create the directory DIR and any nonexistent parent dirs.
|
|
|
2733 Interactively, the default choice of directory to create
|
|
|
2734 is the current default directory for file names.
|
|
|
2735 That is useful when you have visited a file in a nonexistent directory.
|
|
|
2736
|
|
|
2737 Noninteractively, the second (optional) argument PARENTS says whether
|
|
|
2738 to create parent directories if they don't exist."
|
|
|
2739 (interactive (list (let ((current-prefix-arg current-prefix-arg))
|
|
|
2740 (read-directory-name "Create directory: "))
|
|
|
2741 current-prefix-arg))
|
|
|
2742 (let ((handler (find-file-name-handler dir 'make-directory)))
|
|
|
2743 (if handler
|
|
|
2744 (funcall handler 'make-directory dir parents)
|
|
|
2745 (if (not parents)
|
|
|
2746 (make-directory-internal dir)
|
|
|
2747 (let ((dir (directory-file-name (expand-file-name dir)))
|
|
|
2748 create-list)
|
|
|
2749 (while (not (file-exists-p dir))
|
|
|
2750 (setq create-list (cons dir create-list)
|
|
|
2751 dir (directory-file-name (file-name-directory dir))))
|
|
|
2752 (while create-list
|
|
|
2753 (make-directory-internal (car create-list))
|
|
|
2754 (setq create-list (cdr create-list))))))))
|
|
|
2755
|
|
|
2756 (put 'revert-buffer-function 'permanent-local t)
|
|
|
2757 (defvar revert-buffer-function nil
|
|
|
2758 "Function to use to revert this buffer, or nil to do the default.
|
|
|
2759 The function receives two arguments IGNORE-AUTO and NOCONFIRM,
|
|
|
2760 which are the arguments that `revert-buffer' received.")
|
|
|
2761
|
|
|
2762 (put 'revert-buffer-insert-file-contents-function 'permanent-local t)
|
|
|
2763 (defvar revert-buffer-insert-file-contents-function nil
|
|
|
2764 "Function to use to insert contents when reverting this buffer.
|
|
|
2765 Gets two args, first the nominal file name to use,
|
|
|
2766 and second, t if reading the auto-save file.")
|
|
|
2767
|
|
|
2768 (defvar before-revert-hook nil
|
|
|
2769 "Normal hook for `revert-buffer' to run before reverting.
|
|
|
2770 If `revert-buffer-function' is used to override the normal revert
|
|
|
2771 mechanism, this hook is not used.")
|
|
|
2772
|
|
|
2773 (defvar after-revert-hook nil
|
|
|
2774 "Normal hook for `revert-buffer' to run after reverting.
|
|
|
2775 Note that the hook value that it runs is the value that was in effect
|
|
|
2776 before reverting; that makes a difference if you have buffer-local
|
|
|
2777 hook functions.
|
|
|
2778
|
|
|
2779 If `revert-buffer-function' is used to override the normal revert
|
|
|
2780 mechanism, this hook is not used.")
|
|
|
2781
|
|
|
2782 (defvar revert-buffer-internal-hook nil
|
|
|
2783 "Don't use this.")
|
|
|
2784
|
|
|
2785 (defun revert-buffer (&optional ignore-auto noconfirm preserve-modes)
|
|
|
2786 "Replace the buffer text with the text of the visited file on disk.
|
|
|
2787 This undoes all changes since the file was visited or saved.
|
|
|
2788 With a prefix argument, offer to revert from latest auto-save file, if
|
|
|
2789 that is more recent than the visited file.
|
|
|
2790
|
|
|
2791 This command also works for special buffers that contain text which
|
|
|
2792 doesn't come from a file, but reflects some other data base instead:
|
|
|
2793 for example, Dired buffers and buffer-list buffers. In these cases,
|
|
|
2794 it reconstructs the buffer contents from the appropriate data base.
|
|
|
2795
|
|
|
2796 When called from Lisp, the first argument is IGNORE-AUTO; only offer
|
|
|
2797 to revert from the auto-save file when this is nil. Note that the
|
|
|
2798 sense of this argument is the reverse of the prefix argument, for the
|
|
|
2799 sake of backward compatibility. IGNORE-AUTO is optional, defaulting
|
|
|
2800 to nil.
|
|
|
2801
|
|
|
2802 Optional second argument NOCONFIRM means don't ask for confirmation at
|
|
|
2803 all.
|
|
|
2804
|
|
|
2805 Optional third argument PRESERVE-MODES non-nil means don't alter
|
|
|
2806 the files modes. Normally we reinitialize them using `normal-mode'.
|
|
|
2807
|
|
|
2808 If the value of `revert-buffer-function' is non-nil, it is called to
|
|
|
2809 do all the work for this command. Otherwise, the hooks
|
|
|
2810 `before-revert-hook' and `after-revert-hook' are run at the beginning
|
|
|
2811 and the end, and if `revert-buffer-insert-file-contents-function' is
|
|
|
2812 non-nil, it is called instead of rereading visited file contents."
|
|
|
2813
|
|
|
2814 ;; I admit it's odd to reverse the sense of the prefix argument, but
|
|
|
2815 ;; there is a lot of code out there which assumes that the first
|
|
|
2816 ;; argument should be t to avoid consulting the auto-save file, and
|
|
|
2817 ;; there's no straightforward way to encourage authors to notice a
|
|
|
2818 ;; reversal of the argument sense. So I'm just changing the user
|
|
|
2819 ;; interface, but leaving the programmatic interface the same.
|
|
|
2820 (interactive (list (not current-prefix-arg)))
|
|
|
2821 (if revert-buffer-function
|
|
|
2822 (funcall revert-buffer-function ignore-auto noconfirm)
|
|
|
2823 (let* ((opoint (point))
|
|
|
2824 (auto-save-p (and (not ignore-auto)
|
|
|
2825 (recent-auto-save-p)
|
|
|
2826 buffer-auto-save-file-name
|
|
|
2827 (file-readable-p buffer-auto-save-file-name)
|
|
|
2828 (y-or-n-p
|
|
|
2829 "Buffer has been auto-saved recently. Revert from auto-save file? ")))
|
|
|
2830 (file-name (if auto-save-p
|
|
|
2831 buffer-auto-save-file-name
|
|
|
2832 buffer-file-name)))
|
|
|
2833 (cond ((null file-name)
|
|
|
2834 (error "Buffer does not seem to be associated with any file"))
|
|
|
2835 ((or noconfirm
|
|
|
2836 (and (not (buffer-modified-p))
|
|
|
2837 (let (found)
|
|
|
2838 (dolist (rx revert-without-query found)
|
|
|
2839 (when (string-match rx file-name)
|
|
|
2840 (setq found t)))))
|
|
|
2841 (yes-or-no-p (format "Revert buffer from file %s? "
|
|
|
2842 file-name)))
|
|
|
2843 (run-hooks 'before-revert-hook)
|
|
|
2844 ;; If file was backed up but has changed since,
|
|
440
|
2845 ;; we should make another backup.
|
|
428
|
2846 (and (not auto-save-p)
|
|
|
2847 (not (verify-visited-file-modtime (current-buffer)))
|
|
|
2848 (setq buffer-backed-up nil))
|
|
|
2849 ;; Get rid of all undo records for this buffer.
|
|
|
2850 (or (eq buffer-undo-list t)
|
|
|
2851 (setq buffer-undo-list nil))
|
|
|
2852 ;; Effectively copy the after-revert-hook status,
|
|
|
2853 ;; since after-find-file will clobber it.
|
|
|
2854 (let ((global-hook (default-value 'after-revert-hook))
|
|
|
2855 (local-hook-p (local-variable-p 'after-revert-hook
|
|
|
2856 (current-buffer)))
|
|
|
2857 (local-hook (and (local-variable-p 'after-revert-hook
|
|
|
2858 (current-buffer))
|
|
|
2859 after-revert-hook)))
|
|
|
2860 (let (buffer-read-only
|
|
|
2861 ;; Don't make undo records for the reversion.
|
|
|
2862 (buffer-undo-list t))
|
|
|
2863 (if revert-buffer-insert-file-contents-function
|
|
|
2864 (funcall revert-buffer-insert-file-contents-function
|
|
|
2865 file-name auto-save-p)
|
|
|
2866 (if (not (file-exists-p file-name))
|
|
|
2867 (error "File %s no longer exists!" file-name))
|
|
|
2868 ;; Bind buffer-file-name to nil
|
|
|
2869 ;; so that we don't try to lock the file.
|
|
|
2870 (let ((buffer-file-name nil))
|
|
|
2871 (or auto-save-p
|
|
|
2872 (unlock-buffer)))
|
|
|
2873 (widen)
|
|
771
|
2874 ;; When reading in an autosave, it's encoded using
|
|
|
2875 ;; `escape-quoted', so we need to use it. (It is always
|
|
|
2876 ;; safe to specify `escape-quoted':
|
|
|
2877 ;;
|
|
|
2878 ;; 1. If file-coding but no Mule, `escape-quoted' is
|
|
|
2879 ;; aliased to `binary'.
|
|
|
2880 ;; 2. If no file-coding, all coding systems devolve into
|
|
|
2881 ;; `binary'.
|
|
|
2882 ;; 3. ASCII and ISO8859-1 are encoded the same in both
|
|
|
2883 ;; `binary' and `escape-quoted', so they will be
|
|
|
2884 ;; compatible for the most part.)
|
|
|
2885 ;;
|
|
|
2886 ;; Otherwise, use coding-system-for-read if explicitly
|
|
|
2887 ;; given (e.g. the "Revert Buffer with Specified
|
|
|
2888 ;; Encoding" menu entries), or use the coding system
|
|
|
2889 ;; that the file was loaded as.
|
|
|
2890 (let* ((coding-system-for-read
|
|
|
2891 (if auto-save-p 'escape-quoted
|
|
|
2892 (or coding-system-for-read
|
|
|
2893 buffer-file-coding-system-when-loaded)))
|
|
|
2894 ;; If the bfcs wasn't changed from its original
|
|
|
2895 ;; value (other than possible EOL change), then we
|
|
|
2896 ;; should update it for the new coding system.
|
|
|
2897 (should-update-bfcs
|
|
|
2898 (eq (coding-system-base
|
|
|
2899 buffer-file-coding-system-when-loaded)
|
|
|
2900 (coding-system-base
|
|
|
2901 buffer-file-coding-system)))
|
|
|
2902 (old-bfcs buffer-file-coding-system)
|
|
|
2903 ;; But if the EOL was changed, match it in the new
|
|
|
2904 ;; value of bfcs.
|
|
|
2905 (adjust-eol
|
|
|
2906 (and should-update-bfcs
|
|
|
2907 (not
|
|
|
2908 (eq (get-coding-system
|
|
|
2909 buffer-file-coding-system-when-loaded)
|
|
|
2910 (get-coding-system
|
|
|
2911 buffer-file-coding-system))))))
|
|
|
2912 (insert-file-contents file-name (not auto-save-p)
|
|
|
2913 nil nil t)
|
|
|
2914 (when should-update-bfcs
|
|
|
2915 (setq buffer-file-coding-system old-bfcs)
|
|
|
2916 (set-buffer-file-coding-system
|
|
|
2917 (if adjust-eol
|
|
|
2918 (coding-system-base
|
|
|
2919 buffer-file-coding-system-when-loaded)
|
|
|
2920 buffer-file-coding-system-when-loaded)
|
|
|
2921 (not adjust-eol))))))
|
|
428
|
2922 (goto-char (min opoint (point-max)))
|
|
|
2923 ;; Recompute the truename in case changes in symlinks
|
|
|
2924 ;; have changed the truename.
|
|
|
2925 ;XEmacs: already done by insert-file-contents
|
|
|
2926 ;;(setq buffer-file-truename
|
|
|
2927 ;;(abbreviate-file-name (file-truename buffer-file-name)))
|
|
|
2928 (after-find-file nil nil t t preserve-modes)
|
|
|
2929 ;; Run after-revert-hook as it was before we reverted.
|
|
|
2930 (setq-default revert-buffer-internal-hook global-hook)
|
|
|
2931 (if local-hook-p
|
|
|
2932 (progn
|
|
|
2933 (make-local-variable 'revert-buffer-internal-hook)
|
|
|
2934 (setq revert-buffer-internal-hook local-hook))
|
|
|
2935 (kill-local-variable 'revert-buffer-internal-hook))
|
|
|
2936 (run-hooks 'revert-buffer-internal-hook))
|
|
|
2937 t)))))
|
|
|
2938
|
|
|
2939 (defun recover-file (file)
|
|
|
2940 "Visit file FILE, but get contents from its last auto-save file."
|
|
|
2941 ;; Actually putting the file name in the minibuffer should be used
|
|
|
2942 ;; only rarely.
|
|
|
2943 ;; Not just because users often use the default.
|
|
|
2944 (interactive "FRecover file: ")
|
|
|
2945 (setq file (expand-file-name file))
|
|
|
2946 (let ((handler (or (find-file-name-handler file 'recover-file)
|
|
|
2947 (find-file-name-handler
|
|
|
2948 (let ((buffer-file-name file))
|
|
|
2949 (make-auto-save-file-name))
|
|
|
2950 'recover-file))))
|
|
|
2951 (if handler
|
|
|
2952 (funcall handler 'recover-file file)
|
|
464
|
2953 (if (auto-save-file-name-p (file-name-nondirectory file))
|
|
428
|
2954 (error "%s is an auto-save file" file))
|
|
|
2955 (let ((file-name (let ((buffer-file-name file))
|
|
|
2956 (make-auto-save-file-name))))
|
|
|
2957 (cond ((if (file-exists-p file)
|
|
|
2958 (not (file-newer-than-file-p file-name file))
|
|
|
2959 (not (file-exists-p file-name)))
|
|
|
2960 (error "Auto-save file %s not current" file-name))
|
|
|
2961 ((save-window-excursion
|
|
464
|
2962 ;; XEmacs change: use insert-directory instead of
|
|
|
2963 ;; calling ls directly.
|
|
|
2964 (with-output-to-temp-buffer "*Directory*"
|
|
|
2965 (buffer-disable-undo standard-output)
|
|
|
2966 (save-excursion
|
|
|
2967 (set-buffer "*Directory*")
|
|
|
2968 (setq default-directory (file-name-directory file))
|
|
|
2969 (insert-directory file
|
|
|
2970 (if (file-symlink-p file) "-lL" "-l"))
|
|
|
2971 (setq default-directory (file-name-directory file-name))
|
|
|
2972 (insert-directory file-name "-l")))
|
|
428
|
2973 (yes-or-no-p (format "Recover auto save file %s? " file-name)))
|
|
|
2974 (switch-to-buffer (find-file-noselect file t))
|
|
|
2975 (let ((buffer-read-only nil))
|
|
|
2976 (erase-buffer)
|
|
771
|
2977 (let ((coding-system-for-read 'escape-quoted))
|
|
|
2978 (insert-file-contents file-name nil)))
|
|
428
|
2979 (after-find-file nil nil t))
|
|
|
2980 (t (error "Recover-file cancelled.")))))))
|
|
|
2981
|
|
|
2982 (defun recover-session ()
|
|
|
2983 "Recover auto save files from a previous Emacs session.
|
|
|
2984 This command first displays a Dired buffer showing you the
|
|
|
2985 previous sessions that you could recover from.
|
|
|
2986 To choose one, move point to the proper line and then type C-c C-c.
|
|
|
2987 Then you'll be asked about a number of files to recover."
|
|
|
2988 (interactive)
|
|
|
2989 (unless (fboundp 'dired)
|
|
|
2990 (error "recover-session requires dired"))
|
|
|
2991 (if (null auto-save-list-file-prefix)
|
|
|
2992 (error
|
|
|
2993 "You set `auto-save-list-file-prefix' to disable making session files"))
|
|
776
|
2994 (declare-fboundp (dired (concat auto-save-list-file-prefix "*")))
|
|
428
|
2995 (goto-char (point-min))
|
|
|
2996 (or (looking-at "Move to the session you want to recover,")
|
|
|
2997 (let ((inhibit-read-only t))
|
|
|
2998 (insert "Move to the session you want to recover,\n"
|
|
|
2999 "then type C-c C-c to select it.\n\n"
|
|
|
3000 "You can also delete some of these files;\n"
|
|
|
3001 "type d on a line to mark that file for deletion.\n\n")))
|
|
|
3002 (use-local-map (let ((map (make-sparse-keymap)))
|
|
|
3003 (set-keymap-parents map (list (current-local-map)))
|
|
|
3004 map))
|
|
|
3005 (define-key (current-local-map) "\C-c\C-c" 'recover-session-finish))
|
|
|
3006
|
|
|
3007 (defun recover-session-finish ()
|
|
|
3008 "Choose one saved session to recover auto-save files from.
|
|
|
3009 This command is used in the special Dired buffer created by
|
|
|
3010 \\[recover-session]."
|
|
|
3011 (interactive)
|
|
|
3012 ;; Get the name of the session file to recover from.
|
|
526
|
3013 (let ((file (declare-fboundp (dired-get-filename)))
|
|
428
|
3014 files
|
|
|
3015 (buffer (get-buffer-create " *recover*")))
|
|
|
3016 ;; #### dired-do-flagged-delete in FSF.
|
|
|
3017 ;; This version is for ange-ftp
|
|
|
3018 ;;(dired-do-deletions t)
|
|
|
3019 ;; This version is for efs
|
|
526
|
3020 (declare-fboundp (dired-expunge-deletions))
|
|
428
|
3021 (unwind-protect
|
|
|
3022 (save-excursion
|
|
|
3023 ;; Read in the auto-save-list file.
|
|
|
3024 (set-buffer buffer)
|
|
|
3025 (erase-buffer)
|
|
771
|
3026 (let ((coding-system-for-read 'escape-quoted))
|
|
|
3027 (insert-file-contents file))
|
|
428
|
3028 ;; Loop thru the text of that file
|
|
|
3029 ;; and get out the names of the files to recover.
|
|
|
3030 (while (not (eobp))
|
|
|
3031 (let (thisfile autofile)
|
|
|
3032 (if (eolp)
|
|
|
3033 ;; This is a pair of lines for a non-file-visiting buffer.
|
|
|
3034 ;; Get the auto-save file name and manufacture
|
|
|
3035 ;; a "visited file name" from that.
|
|
|
3036 (progn
|
|
|
3037 (forward-line 1)
|
|
|
3038 (setq autofile
|
|
|
3039 (buffer-substring-no-properties
|
|
|
3040 (point)
|
|
|
3041 (save-excursion
|
|
|
3042 (end-of-line)
|
|
|
3043 (point))))
|
|
|
3044 (setq thisfile
|
|
|
3045 (expand-file-name
|
|
|
3046 (substring
|
|
|
3047 (file-name-nondirectory autofile)
|
|
|
3048 1 -1)
|
|
|
3049 (file-name-directory autofile)))
|
|
|
3050 (forward-line 1))
|
|
|
3051 ;; This pair of lines is a file-visiting
|
|
|
3052 ;; buffer. Use the visited file name.
|
|
|
3053 (progn
|
|
|
3054 (setq thisfile
|
|
|
3055 (buffer-substring-no-properties
|
|
|
3056 (point) (progn (end-of-line) (point))))
|
|
|
3057 (forward-line 1)
|
|
|
3058 (setq autofile
|
|
|
3059 (buffer-substring-no-properties
|
|
|
3060 (point) (progn (end-of-line) (point))))
|
|
|
3061 (forward-line 1)))
|
|
|
3062 ;; Ignore a file if its auto-save file does not exist now.
|
|
|
3063 (if (file-exists-p autofile)
|
|
|
3064 (setq files (cons thisfile files)))))
|
|
|
3065 (setq files (nreverse files))
|
|
|
3066 ;; The file contains a pair of line for each auto-saved buffer.
|
|
|
3067 ;; The first line of the pair contains the visited file name
|
|
|
3068 ;; or is empty if the buffer was not visiting a file.
|
|
|
3069 ;; The second line is the auto-save file name.
|
|
|
3070 (if files
|
|
|
3071 (map-y-or-n-p "Recover %s? "
|
|
|
3072 (lambda (file)
|
|
|
3073 (condition-case nil
|
|
|
3074 (save-excursion (recover-file file))
|
|
|
3075 (error
|
|
793
|
3076 (lwarn 'recover 'alert "Failed to recover `%s'" file))))
|
|
428
|
3077 files
|
|
|
3078 '("file" "files" "recover"))
|
|
|
3079 (message "No files can be recovered from this session now")))
|
|
|
3080 (kill-buffer buffer))))
|
|
|
3081
|
|
|
3082 (defun kill-some-buffers (&optional list)
|
|
|
3083 "For each buffer in LIST, ask whether to kill it.
|
|
|
3084 LIST defaults to all existing live buffers."
|
|
|
3085 (interactive)
|
|
|
3086 (if (null list)
|
|
|
3087 (setq list (buffer-list)))
|
|
|
3088 (while list
|
|
|
3089 (let* ((buffer (car list))
|
|
|
3090 (name (buffer-name buffer)))
|
|
|
3091 (and (not (string-equal name ""))
|
|
|
3092 (/= (aref name 0) ?\ )
|
|
|
3093 (yes-or-no-p
|
|
|
3094 (format
|
|
|
3095 (if (buffer-modified-p buffer)
|
|
|
3096 (gettext "Buffer %s HAS BEEN EDITED. Kill? ")
|
|
|
3097 (gettext "Buffer %s is unmodified. Kill? "))
|
|
|
3098 name))
|
|
|
3099 (kill-buffer buffer)))
|
|
|
3100 (setq list (cdr list))))
|
|
|
3101
|
|
|
3102 (defun auto-save-mode (arg)
|
|
|
3103 "Toggle auto-saving of contents of current buffer.
|
|
|
3104 With prefix argument ARG, turn auto-saving on if positive, else off."
|
|
|
3105 (interactive "P")
|
|
|
3106 (setq buffer-auto-save-file-name
|
|
|
3107 (and (if (null arg)
|
|
|
3108 (or (not buffer-auto-save-file-name)
|
|
|
3109 ;; If autosave is off because buffer has shrunk,
|
|
|
3110 ;; then toggling should turn it on.
|
|
|
3111 (< buffer-saved-size 0))
|
|
|
3112 (or (eq arg t) (listp arg) (and (integerp arg) (> arg 0))))
|
|
|
3113 (if (and buffer-file-name auto-save-visited-file-name
|
|
|
3114 (not buffer-read-only))
|
|
|
3115 buffer-file-name
|
|
|
3116 (make-auto-save-file-name))))
|
|
|
3117 ;; If -1 was stored here, to temporarily turn off saving,
|
|
|
3118 ;; turn it back on.
|
|
|
3119 (and (< buffer-saved-size 0)
|
|
|
3120 (setq buffer-saved-size 0))
|
|
|
3121 (if (interactive-p)
|
|
|
3122 (if buffer-auto-save-file-name ;; rewritten for I18N3 snarfing
|
|
|
3123 (display-message 'command "Auto-save on (in this buffer)")
|
|
|
3124 (display-message 'command "Auto-save off (in this buffer)")))
|
|
|
3125 buffer-auto-save-file-name)
|
|
|
3126
|
|
|
3127 (defun rename-auto-save-file ()
|
|
|
3128 "Adjust current buffer's auto save file name for current conditions.
|
|
|
3129 Also rename any existing auto save file, if it was made in this session."
|
|
|
3130 (let ((osave buffer-auto-save-file-name))
|
|
|
3131 (setq buffer-auto-save-file-name
|
|
|
3132 (make-auto-save-file-name))
|
|
|
3133 (if (and osave buffer-auto-save-file-name
|
|
|
3134 (not (string= buffer-auto-save-file-name buffer-file-name))
|
|
|
3135 (not (string= buffer-auto-save-file-name osave))
|
|
|
3136 (file-exists-p osave)
|
|
|
3137 (recent-auto-save-p))
|
|
|
3138 (rename-file osave buffer-auto-save-file-name t))))
|
|
|
3139
|
|
464
|
3140 ;; make-auto-save-file-name and auto-save-file-name-p are now only in
|
|
|
3141 ;; auto-save.el.
|
|
428
|
3142
|
|
|
3143
|
|
|
3144 (defun wildcard-to-regexp (wildcard)
|
|
|
3145 "Given a shell file name pattern WILDCARD, return an equivalent regexp.
|
|
|
3146 The generated regexp will match a filename iff the filename
|
|
|
3147 matches that wildcard according to shell rules. Only wildcards known
|
|
|
3148 by `sh' are supported."
|
|
|
3149 (let* ((i (string-match "[[.*+\\^$?]" wildcard))
|
|
|
3150 ;; Copy the initial run of non-special characters.
|
|
|
3151 (result (substring wildcard 0 i))
|
|
|
3152 (len (length wildcard)))
|
|
|
3153 ;; If no special characters, we're almost done.
|
|
|
3154 (if i
|
|
|
3155 (while (< i len)
|
|
|
3156 (let ((ch (aref wildcard i))
|
|
|
3157 j)
|
|
|
3158 (setq
|
|
|
3159 result
|
|
|
3160 (concat result
|
|
|
3161 (cond
|
|
|
3162 ((eq ch ?\[) ; [...] maps to regexp char class
|
|
|
3163 (progn
|
|
|
3164 (setq i (1+ i))
|
|
|
3165 (concat
|
|
|
3166 (cond
|
|
|
3167 ((eq (aref wildcard i) ?!) ; [!...] -> [^...]
|
|
|
3168 (progn
|
|
|
3169 (setq i (1+ i))
|
|
|
3170 (if (eq (aref wildcard i) ?\])
|
|
|
3171 (progn
|
|
|
3172 (setq i (1+ i))
|
|
|
3173 "[^]")
|
|
|
3174 "[^")))
|
|
|
3175 ((eq (aref wildcard i) ?^)
|
|
|
3176 ;; Found "[^". Insert a `\0' character
|
|
|
3177 ;; (which cannot happen in a filename)
|
|
|
3178 ;; into the character class, so that `^'
|
|
|
3179 ;; is not the first character after `[',
|
|
|
3180 ;; and thus non-special in a regexp.
|
|
|
3181 (progn
|
|
|
3182 (setq i (1+ i))
|
|
|
3183 "[\000^"))
|
|
|
3184 ((eq (aref wildcard i) ?\])
|
|
|
3185 ;; I don't think `]' can appear in a
|
|
|
3186 ;; character class in a wildcard, but
|
|
|
3187 ;; let's be general here.
|
|
|
3188 (progn
|
|
|
3189 (setq i (1+ i))
|
|
|
3190 "[]"))
|
|
|
3191 (t "["))
|
|
|
3192 (prog1 ; copy everything upto next `]'.
|
|
|
3193 (substring wildcard
|
|
|
3194 i
|
|
|
3195 (setq j (string-match
|
|
|
3196 "]" wildcard i)))
|
|
|
3197 (setq i (if j (1- j) (1- len)))))))
|
|
|
3198 ((eq ch ?.) "\\.")
|
|
|
3199 ((eq ch ?*) "[^\000]*")
|
|
|
3200 ((eq ch ?+) "\\+")
|
|
|
3201 ((eq ch ?^) "\\^")
|
|
|
3202 ((eq ch ?$) "\\$")
|
|
|
3203 ((eq ch ?\\) "\\\\") ; probably cannot happen...
|
|
|
3204 ((eq ch ??) "[^\000]")
|
|
|
3205 (t (char-to-string ch)))))
|
|
|
3206 (setq i (1+ i)))))
|
|
|
3207 ;; Shell wildcards should match the entire filename,
|
|
|
3208 ;; not its part. Make the regexp say so.
|
|
|
3209 (concat "\\`" result "\\'")))
|
|
|
3210
|
|
|
3211 (defcustom list-directory-brief-switches "-CF"
|
|
|
3212 "*Switches for list-directory to pass to `ls' for brief listing."
|
|
|
3213 :type 'string
|
|
|
3214 :group 'dired)
|
|
|
3215
|
|
|
3216 (defcustom list-directory-verbose-switches "-l"
|
|
|
3217 "*Switches for list-directory to pass to `ls' for verbose listing,"
|
|
|
3218 :type 'string
|
|
|
3219 :group 'dired)
|
|
|
3220
|
|
|
3221 (defun list-directory (dirname &optional verbose)
|
|
|
3222 "Display a list of files in or matching DIRNAME, a la `ls'.
|
|
|
3223 DIRNAME is globbed by the shell if necessary.
|
|
|
3224 Prefix arg (second arg if noninteractive) means supply -l switch to `ls'.
|
|
|
3225 Actions controlled by variables `list-directory-brief-switches'
|
|
|
3226 and `list-directory-verbose-switches'."
|
|
|
3227 (interactive (let ((pfx current-prefix-arg))
|
|
|
3228 (list (read-file-name (if pfx (gettext "List directory (verbose): ")
|
|
|
3229 (gettext "List directory (brief): "))
|
|
|
3230 nil default-directory nil)
|
|
|
3231 pfx)))
|
|
|
3232 (let ((switches (if verbose list-directory-verbose-switches
|
|
|
3233 list-directory-brief-switches)))
|
|
|
3234 (or dirname (setq dirname default-directory))
|
|
|
3235 (setq dirname (expand-file-name dirname))
|
|
|
3236 (with-output-to-temp-buffer "*Directory*"
|
|
|
3237 (buffer-disable-undo standard-output)
|
|
|
3238 (princ "Directory ")
|
|
|
3239 (princ dirname)
|
|
|
3240 (terpri)
|
|
|
3241 (save-excursion
|
|
|
3242 (set-buffer "*Directory*")
|
|
|
3243 (setq default-directory (file-name-directory dirname))
|
|
|
3244 (let ((wildcard (not (file-directory-p dirname))))
|
|
|
3245 (insert-directory dirname switches wildcard (not wildcard)))))))
|
|
|
3246
|
|
|
3247 (defvar insert-directory-program "ls"
|
|
|
3248 "Absolute or relative name of the `ls' program used by `insert-directory'.")
|
|
|
3249
|
|
|
3250 ;; insert-directory
|
|
|
3251 ;; - must insert _exactly_one_line_ describing FILE if WILDCARD and
|
|
|
3252 ;; FULL-DIRECTORY-P is nil.
|
|
|
3253 ;; The single line of output must display FILE's name as it was
|
|
|
3254 ;; given, namely, an absolute path name.
|
|
|
3255 ;; - must insert exactly one line for each file if WILDCARD or
|
|
|
3256 ;; FULL-DIRECTORY-P is t, plus one optional "total" line
|
|
|
3257 ;; before the file lines, plus optional text after the file lines.
|
|
|
3258 ;; Lines are delimited by "\n", so filenames containing "\n" are not
|
|
|
3259 ;; allowed.
|
|
|
3260 ;; File lines should display the basename.
|
|
|
3261 ;; - must be consistent with
|
|
|
3262 ;; - functions dired-move-to-filename, (these two define what a file line is)
|
|
|
3263 ;; dired-move-to-end-of-filename,
|
|
|
3264 ;; dired-between-files, (shortcut for (not (dired-move-to-filename)))
|
|
|
3265 ;; dired-insert-headerline
|
|
|
3266 ;; dired-after-subdir-garbage (defines what a "total" line is)
|
|
|
3267 ;; - variable dired-subdir-regexp
|
|
|
3268 (defun insert-directory (file switches &optional wildcard full-directory-p)
|
|
|
3269 "Insert directory listing for FILE, formatted according to SWITCHES.
|
|
|
3270 Leaves point after the inserted text.
|
|
|
3271 SWITCHES may be a string of options, or a list of strings.
|
|
|
3272 Optional third arg WILDCARD means treat FILE as shell wildcard.
|
|
|
3273 Optional fourth arg FULL-DIRECTORY-P means file is a directory and
|
|
|
3274 switches do not contain `d', so that a full listing is expected.
|
|
|
3275
|
|
|
3276 This works by running a directory listing program
|
|
|
3277 whose name is in the variable `insert-directory-program'.
|
|
|
3278 If WILDCARD, it also runs the shell specified by `shell-file-name'."
|
|
|
3279 ;; We need the directory in order to find the right handler.
|
|
|
3280 (let ((handler (find-file-name-handler (expand-file-name file)
|
|
|
3281 'insert-directory)))
|
|
|
3282 (if handler
|
|
|
3283 (funcall handler 'insert-directory file switches
|
|
|
3284 wildcard full-directory-p)
|
|
|
3285 (cond
|
|
464
|
3286 ;; [mswindows-insert-directory should be called
|
|
|
3287 ;; nt-insert-directory - kkm]. not true any more according to
|
|
|
3288 ;; my new naming scheme. --ben
|
|
428
|
3289 ((and (fboundp 'mswindows-insert-directory)
|
|
|
3290 (eq system-type 'windows-nt))
|
|
613
|
3291 (declare-fboundp (mswindows-insert-directory
|
|
|
3292 file switches wildcard full-directory-p)))
|
|
428
|
3293 (t
|
|
|
3294 (if wildcard
|
|
|
3295 ;; Run ls in the directory of the file pattern we asked for.
|
|
|
3296 (let ((default-directory
|
|
|
3297 (if (file-name-absolute-p file)
|
|
|
3298 (file-name-directory file)
|
|
|
3299 (file-name-directory (expand-file-name file))))
|
|
|
3300 (pattern (file-name-nondirectory file))
|
|
444
|
3301 (start 0))
|
|
428
|
3302 ;; Quote some characters that have special meanings in shells;
|
|
|
3303 ;; but don't quote the wildcards--we want them to be special.
|
|
|
3304 ;; We also currently don't quote the quoting characters
|
|
|
3305 ;; in case people want to use them explicitly to quote
|
|
|
3306 ;; wildcard characters.
|
|
|
3307 ;;#### Unix-specific
|
|
444
|
3308 (while (string-match "[ \t\n;<>&|()#$]" pattern start)
|
|
428
|
3309 (setq pattern
|
|
|
3310 (concat (substring pattern 0 (match-beginning 0))
|
|
|
3311 "\\"
|
|
|
3312 (substring pattern (match-beginning 0)))
|
|
444
|
3313 start (1+ (match-end 0))))
|
|
428
|
3314 (call-process shell-file-name nil t nil
|
|
|
3315 "-c" (concat "\\" ;; Disregard shell aliases!
|
|
|
3316 insert-directory-program
|
|
|
3317 " -d "
|
|
|
3318 (if (stringp switches)
|
|
|
3319 switches
|
|
|
3320 (mapconcat 'identity switches " "))
|
|
|
3321 " "
|
|
|
3322 pattern)))
|
|
|
3323 ;; SunOS 4.1.3, SVr4 and others need the "." to list the
|
|
|
3324 ;; directory if FILE is a symbolic link.
|
|
|
3325 (apply 'call-process
|
|
|
3326 insert-directory-program nil t nil
|
|
|
3327 (let (list)
|
|
|
3328 (if (listp switches)
|
|
|
3329 (setq list switches)
|
|
|
3330 (if (not (equal switches ""))
|
|
|
3331 (progn
|
|
|
3332 ;; Split the switches at any spaces
|
|
|
3333 ;; so we can pass separate options as separate args.
|
|
|
3334 (while (string-match " " switches)
|
|
|
3335 (setq list (cons (substring switches 0 (match-beginning 0))
|
|
|
3336 list)
|
|
|
3337 switches (substring switches (match-end 0))))
|
|
|
3338 (setq list (cons switches list)))))
|
|
|
3339 (append list
|
|
|
3340 (list
|
|
|
3341 (if full-directory-p
|
|
|
3342 (concat (file-name-as-directory file)
|
|
|
3343 ;;#### Unix-specific
|
|
|
3344 ".")
|
|
|
3345 file)))))))))))
|
|
|
3346
|
|
|
3347 (defvar kill-emacs-query-functions nil
|
|
|
3348 "Functions to call with no arguments to query about killing XEmacs.
|
|
|
3349 If any of these functions returns nil, killing Emacs is cancelled.
|
|
|
3350 `save-buffers-kill-emacs' (\\[save-buffers-kill-emacs]) calls these functions,
|
|
|
3351 but `kill-emacs', the low level primitive, does not.
|
|
|
3352 See also `kill-emacs-hook'.")
|
|
|
3353
|
|
|
3354 (defun save-buffers-kill-emacs (&optional arg)
|
|
|
3355 "Offer to save each buffer, then kill this XEmacs process.
|
|
|
3356 With prefix arg, silently save all file-visiting buffers, then kill."
|
|
|
3357 (interactive "P")
|
|
|
3358 (save-some-buffers arg t)
|
|
|
3359 (and (or (not (memq t (mapcar #'(lambda (buf) (and (buffer-file-name buf)
|
|
|
3360 (buffer-modified-p buf)))
|
|
|
3361 (buffer-list))))
|
|
|
3362 (yes-or-no-p "Modified buffers exist; exit anyway? "))
|
|
|
3363 (or (not (fboundp 'process-list))
|
|
|
3364 ;; process-list is not defined on VMS.
|
|
|
3365 (let ((processes (process-list))
|
|
|
3366 active)
|
|
|
3367 (while processes
|
|
|
3368 (and (memq (process-status (car processes)) '(run stop open))
|
|
|
3369 (let ((val (process-kill-without-query (car processes))))
|
|
|
3370 (process-kill-without-query (car processes) val)
|
|
|
3371 val)
|
|
|
3372 (setq active t))
|
|
|
3373 (setq processes (cdr processes)))
|
|
|
3374 (or
|
|
|
3375 (not active)
|
|
|
3376 (save-excursion
|
|
|
3377 (save-window-excursion
|
|
|
3378 (delete-other-windows)
|
|
|
3379 (list-processes)
|
|
|
3380 (yes-or-no-p
|
|
|
3381 "Active processes exist; kill them and exit anyway? "))))))
|
|
|
3382 ;; Query the user for other things, perhaps.
|
|
|
3383 (run-hook-with-args-until-failure 'kill-emacs-query-functions)
|
|
|
3384 (kill-emacs)))
|
|
|
3385
|
|
|
3386 (defun symlink-expand-file-name (filename)
|
|
|
3387 "If FILENAME is a symlink, return its non-symlink equivalent.
|
|
|
3388 Unlike `file-truename', this doesn't chase symlinks in directory
|
|
|
3389 components of the file or expand a relative pathname into an
|
|
|
3390 absolute one."
|
|
|
3391 (let ((count 20))
|
|
|
3392 (while (and (> count 0) (file-symlink-p filename))
|
|
|
3393 (setq filename (file-symlink-p filename)
|
|
|
3394 count (1- count)))
|
|
|
3395 (if (> count 0)
|
|
|
3396 filename
|
|
|
3397 (error "Apparently circular symlink path"))))
|
|
|
3398
|
|
|
3399 ;; Suggested by Michael Kifer <kifer@CS.SunySB.EDU>
|
|
|
3400 (defun file-remote-p (file-name)
|
|
|
3401 "Test whether FILE-NAME is looked for on a remote system."
|
|
776
|
3402 (cond ((not (declare-boundp allow-remote-paths)) nil)
|
|
502
|
3403 ((fboundp 'ange-ftp-ftp-path)
|
|
|
3404 (declare-fboundp (ange-ftp-ftp-path file-name)))
|
|
|
3405 ((fboundp 'efs-ftp-path)
|
|
|
3406 (declare-fboundp (efs-ftp-path file-name)))
|
|
428
|
3407 (t nil)))
|
|
|
3408
|
|
|
3409 ;; #### FSF has file-name-non-special here.
|
|
|
3410
|
|
|
3411 ;;; files.el ends here
|
