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1 ;;; shadowfile.el --- automatic file copying for Emacs 19
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2
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3 ;; Copyright (C) 1993, 1994 Free Software Foundation, Inc.
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4
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5 ;; Author: Boris Goldowsky <boris@gnu.ai.mit.edu>
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6 ;; Keywords: comm
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7
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8 ;; This file is part of XEmacs.
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9
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10 ;; XEmacs is free software; you can redistribute it and/or modify it
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11 ;; under the terms of the GNU General Public License as published by
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12 ;; the Free Software Foundation; either version 2, or (at your option)
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13 ;; any later version.
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14
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15 ;; XEmacs is distributed in the hope that it will be useful, but
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16 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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18 ;; General Public License for more details.
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19
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20 ;; You should have received a copy of the GNU General Public License
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21 ;; along with XEmacs; see the file COPYING. If not, write to the Free
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22 ;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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23 ;; 02111-1307, USA.
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24
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25 ;; LCD Archive Entry:
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26 ;; shadowfile|Boris Goldowsky|boris@gnu.ai.mit.edu|
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27 ;; Helps you keep identical copies of files in multiple places.|
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209
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28 ;; $Date: 1997/11/09 07:07:32 $ |$Revision: 1.3 $|~/misc/shadowfile.el.Z|
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29
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30 ;;; Synched up with: FSF 19.30.
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31
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32 ;; Commentary:
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33
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34 ;; This package helps you to keep identical copies of files in more than one
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35 ;; place - possibly on different machines. When you save a file, it checks
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36 ;; whether it is on the list of files with "shadows", and if so, it tries to
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37 ;; copy it when you exit emacs (or use the shadow-copy-files command).
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38
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39 ;; Installation & Use:
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40
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41 ;; Put (require 'shadowfile) in your .emacs; add clusters (if necessary)
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42 ;; and file groups with shadow-define-cluster,
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43 ;; shadow-define-literal-group, and shadow-define-regexp-group (see the
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44 ;; documentation for these functions for information on how and when to
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45 ;; use them). After doing this once, everything should be automatic.
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46
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47 ;; The lists of clusters and shadows are saved in a file called .shadows,
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48 ;; so that they can be remembered from one emacs session to another, even
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49 ;; (as much as possible) if the emacs session terminates abnormally. The
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50 ;; files needing to be copied are stored in .shadow_todo; if a file cannot
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51 ;; be copied for any reason, it will stay on the list to be tried again
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52 ;; next time. The .shadows file should itself have shadows on all your
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53 ;; accounts so that the information in it is consistent everywhere, but
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54 ;; .shadow_todo is local information and should have no shadows.
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55
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56 ;; If you do not want to copy a particular file, you can answer "no" and
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57 ;; be asked again next time you hit C-x 4 s or exit emacs. If you do not
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58 ;; want to be asked again, use shadow-cancel, and you will not be asked
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59 ;; until you change the file and save it again. If you do not want to
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60 ;; shadow that file ever again, you can edit it out of the .shadows
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61 ;; buffer. Anytime you edit the .shadows buffer, you must type M-x
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62 ;; shadow-read-files to load in the new information, or your changes will
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63 ;; be overwritten!
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64
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65 ;; Bugs & Warnings:
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66 ;;
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67 ;; - It is bad to have two emacses both running shadowfile at the same
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68 ;; time. It tries to detect this condition, but is not always successful.
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69 ;;
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70 ;; - You have to be careful not to edit a file in two locations
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71 ;; before shadowfile has had a chance to copy it; otherwise
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72 ;; "updating shadows" will overwrite one of the changed versions.
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73 ;;
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74 ;; - It ought to check modification times of both files to make sure
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75 ;; it is doing the right thing. This will have to wait until
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76 ;; file-newer-than-file-p works between machines.
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77 ;;
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78 ;; - It will not make directories for you, it just fails to copy files
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79 ;; that belong in non-existent directories.
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80 ;;
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81 ;; Please report any bugs to me (boris@gnu.ai.mit.edu). Also let me know
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82 ;; if you have suggestions or would like to be informed of updates.
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83
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84 ;;; Code:
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85
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86 (provide 'shadowfile)
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87 (require 'efs-auto)
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88
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209
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89 ;;; I don't think this is very cool... hope it works without the setting.
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90 (setq find-file-visit-truename t) ; makes life easier with symbolic links
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91
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92 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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93 ;;; Variables
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94 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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209
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95 (defgroup shadowfile nil
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96 "Keep identical copies of files in more than one place."
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97 :group 'files
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98 :prefix "shadow")
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99
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209
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100 (defcustom shadow-noquery nil
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101 "*If t, always copy shadow files without asking.
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102 If nil \(the default), always ask. If not nil and not t, ask only if there
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209
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103 is no buffer currently visiting the file."
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104 :type 'boolean
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105 :group 'shadowfile)
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106
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209
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107 (defcustom shadow-inhibit-message nil
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108 "*If nonnil, do not display a message when a file needs copying."
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109 :type 'boolean
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110 :group 'shadowfile)
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111
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209
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112 (defcustom shadow-inhibit-overload nil
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113 "If nonnil, shadowfile won't redefine C-x C-c.
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114 Normally it overloads the function `save-buffers-kill-emacs' to check
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115 for files have been changed and need to be copied to other systems."
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116 :type 'boolean
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117 :group 'shadowfile)
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118
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209
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119 (defcustom shadow-info-file nil
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120 "File to keep shadow information in.
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121 The shadow-info-file should be shadowed to all your accounts to
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209
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122 ensure consistency. Default: ~/.xemacs/shadows"
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123 :type '(choice (const :tag "Default" nil)
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124 (file))
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125 :group 'shadowfile)
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126
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209
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127 (defcustom shadow-todo-file nil
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128 "File to store the list of uncopied shadows in.
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129 This means that if a remote system is down, or for any reason you cannot or
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130 decide not to copy your shadow files at the end of one emacs session, it will
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131 remember and ask you again in your next emacs session.
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132 This file must NOT be shadowed to any other system, it is host-specific.
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133 Default: ~/.xemacs/shadow_todo"
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134 :type '(choice (const :tag "Default" nil)
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135 (file))
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136 :group 'shadowfile)
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137
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138 ;;; The following two variables should in most cases initialize themselves
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139 ;;; correctly. They are provided as variables in case the defaults are wrong
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140 ;;; on your machine \(and for efficiency).
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141
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142 (defvar shadow-system-name (system-name)
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143 "The complete hostname of this machine.")
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144
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145 (defvar shadow-homedir nil
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146 "Your home directory on this machine.")
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147
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148 ;;;
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149 ;;; Internal variables whose values are stored in the info and todo files:
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150 ;;;
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151
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152 (defvar shadow-clusters nil
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153 "List of host clusters \(see shadow-define-cluster).")
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154
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155 (defvar shadow-literal-groups nil
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156 "List of files that are shared between hosts.
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157 This list contains shadow structures with literal filenames, created by
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158 shadow-define-group.")
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159
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160 (defvar shadow-regexp-groups nil
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161 "List of file types that are shared between hosts.
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162 This list contains shadow structures with regexps matching filenames,
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163 created by shadow-define-regexp-group.")
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164
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165 ;;;
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166 ;;; Other internal variables:
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167 ;;;
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168
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169 (defvar shadow-files-to-copy nil) ; List of files that need to
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170 ; be copied to remote hosts.
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171
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172 (defvar shadow-hashtable nil) ; for speed
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173
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174 (defvar shadow-info-buffer nil) ; buf visiting shadow-info-file
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175 (defvar shadow-todo-buffer nil) ; buf visiting shadow-todo-file
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176
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177 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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178 ;;; Syntactic sugar; General list and string manipulation
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179 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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180
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181 (defmacro shadow-when (condition &rest body)
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182 ;; From cl.el
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183 "(shadow-when CONDITION . BODY) => evaluate BODY if CONDITION is true."
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184 (` (if (not (, condition)) () (,@ body))))
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185
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186 (defun shadow-union (a b)
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187 "Add members of list A to list B
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188 if they are not equal to items already in B."
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189 (if (null a)
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190 b
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191 (if (member (car a) b)
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192 (shadow-union (cdr a) b)
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193 (shadow-union (cdr a) (cons (car a) b)))))
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194
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195 (defun shadow-find (func list)
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196 "If FUNC applied to some element of LIST is nonnil,
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197 return the first such element."
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198 (while (and list (not (funcall func (car list))))
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199 (setq list (cdr list)))
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200 (car list))
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201
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202 (defun shadow-remove-if (func list)
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203 "Remove elements satisfying FUNC from LIST.
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204 Nondestructive; actually returns a copy of the list with the elements removed."
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205 (if list
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206 (if (funcall func (car list))
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207 (shadow-remove-if func (cdr list))
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208 (cons (car list) (shadow-remove-if func (cdr list))))
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209 nil))
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210
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211 (defun shadow-join (strings sep)
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212 "Concatenate elements of the list of STRINGS with SEP between each."
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213 (cond ((null strings) "")
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214 ((null (cdr strings)) (car strings))
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215 ((concat (car strings) " " (shadow-join (cdr strings) sep)))))
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216
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217 (defun shadow-regexp-superquote (string)
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218 "Like regexp-quote, but includes the ^ and $
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219 to make sure regexp matches nothing but STRING."
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220 (concat "^" (regexp-quote string) "$"))
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221
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222 (defun shadow-suffix (prefix string)
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223 "If PREFIX begins STRING, return the rest.
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224 Return value is nonnil if PREFIX and STRING are string= up to the length of
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225 PREFIX."
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226 (let ((lp (length prefix))
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227 (ls (length string)))
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228 (if (and (>= ls lp)
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229 (string= prefix (substring string 0 lp)))
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230 (substring string lp))))
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231
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232 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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233 ;;; Clusters and sites
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234 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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235
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236 ;;; I use the term `site' to refer to a string which may be the name of a
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237 ;;; cluster or a literal hostname. All user-level commands should accept
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238 ;;; either.
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239
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240 (defun shadow-make-cluster (name primary regexp)
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241 "Creates a shadow cluster
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242 called NAME, using the PRIMARY hostname, REGEXP matching all hosts in the
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243 cluster. The variable shadow-clusters associates the names of clusters to
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244 these structures.
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245 This function is for program use: to create clusters interactively, use
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246 shadow-define-cluster instead."
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247 (list name primary regexp))
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248
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249 (defmacro shadow-cluster-name (cluster)
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250 "Return the name of the CLUSTER."
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251 (list 'elt cluster 0))
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252
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253 (defmacro shadow-cluster-primary (cluster)
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254 "Return the primary hostname of a CLUSTER."
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255 (list 'elt cluster 1))
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256
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257 (defmacro shadow-cluster-regexp (cluster)
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258 "Return the regexp matching hosts in a CLUSTER."
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259 (list 'elt cluster 2))
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260
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261 (defun shadow-set-cluster (name primary regexp)
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262 "Put cluster NAME on the list of clusters,
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263 replacing old definition if any. PRIMARY and REGEXP are the
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264 information defining the cluster. For interactive use, call
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265 shadow-define-cluster instead."
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266 (let ((rest (shadow-remove-if
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267 (function (lambda (x) (equal name (car x))))
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268 shadow-clusters)))
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269 (setq shadow-clusters
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270 (cons (shadow-make-cluster name primary regexp)
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271 rest))))
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272
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273 (defmacro shadow-get-cluster (name)
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274 "Return cluster named NAME, or nil."
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275 (list 'assoc name 'shadow-clusters))
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276
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277 (defun shadow-site-primary (site)
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278 "If SITE is a cluster, return primary host, otherwise return SITE."
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279 (let ((c (shadow-get-cluster site)))
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280 (if c
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281 (shadow-cluster-primary c)
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282 site)))
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283
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284 ;;; SITES
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285
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286 (defun shadow-site-cluster (site)
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287 "Given a SITE \(hostname or cluster name), return the cluster
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288 that it is in, or nil."
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289 (or (assoc site shadow-clusters)
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290 (shadow-find
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291 (function (lambda (x)
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292 (string-match (shadow-cluster-regexp x)
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293 site)))
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294 shadow-clusters)))
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295
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296 (defun shadow-read-site ()
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297 "Read a cluster name or hostname from the minibuffer."
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298 (let ((ans (completing-read "Host or cluster name [RET when done]: "
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299 shadow-clusters)))
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300 (if (equal "" ans)
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301 nil
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302 ans)))
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303
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304 (defun shadow-site-match (site1 site2)
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305 "Nonnil iff SITE1 is or includes SITE2.
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306 Each may be a host or cluster name; if they are clusters, regexp of site1 will
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307 be matched against the primary of site2."
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308 (or (string-equal site1 site2) ; quick check
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309 (let* ((cluster1 (shadow-get-cluster site1))
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310 (primary2 (shadow-site-primary site2)))
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311 (if cluster1
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312 (string-match (shadow-cluster-regexp cluster1) primary2)
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313 (string-equal site1 primary2)))))
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314
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315 (defun shadow-get-user (site)
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316 "Returns the default username for a site."
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317 (efs-get-user (shadow-site-primary site)))
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318
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319 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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320 ;;; Filename manipulation
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321 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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322
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323 (defun shadow-parse-fullpath (fullpath)
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324 "Parse PATH into \(site user path) list,
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325 or leave it alone if it already is one. Returns nil if the argument is not a
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326 full efs ftp pathname."
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327 (if (listp fullpath)
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328 fullpath
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209
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329 (efs-ftp-path fullpath)))
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330
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331 (defun shadow-parse-path (path)
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332 "Parse any PATH into \(site user path) list.
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333 Argument can be a simple path, full efs ftp path, or already a hup list."
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334 (or (shadow-parse-fullpath path)
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335 (list shadow-system-name
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336 (user-login-name)
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337 path)))
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338
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339 (defsubst shadow-make-fullpath (host user path)
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340 "Make an efs style fullpath out of HOST, USER (optional), and PATH.
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341 This is probably not as general as it ought to be."
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342 (concat "/"
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343 (if user (concat user "@"))
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344 host ":"
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345 path))
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346
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347 (defun shadow-replace-path-component (fullpath newpath)
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348 "Return FULLPATH with the pathname component changed to NEWPATH."
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349 (let ((hup (shadow-parse-fullpath fullpath)))
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350 (shadow-make-fullpath (nth 0 hup) (nth 1 hup) newpath)))
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351
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352 (defun shadow-local-file (file)
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353 "If FILENAME is at this site,
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354 remove /user@host part. If refers to a different system or a different user on
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355 this system, return nil."
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356 (let ((hup (shadow-parse-fullpath file)))
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357 (cond ((null hup) file)
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358 ((and (shadow-site-match (nth 0 hup) shadow-system-name)
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359 (string-equal (nth 1 hup) (user-login-name)))
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360 (nth 2 hup))
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361 (t nil))))
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362
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363 (defun shadow-expand-cluster-in-file-name (file)
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364 "If hostname part of FILE is a cluster, expand it
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365 into the cluster's primary hostname. Will return the pathname bare if it is
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366 a local file."
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367 (let ((hup (shadow-parse-path file))
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368 cluster)
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369 (cond ((null hup) file)
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370 ((shadow-local-file hup))
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371 ((shadow-make-fullpath (shadow-site-primary (nth 0 hup))
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372 (nth 1 hup)
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373 (nth 2 hup))))))
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374
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375 (defun shadow-expand-file-name (file &optional default)
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376 "Expand file name and get file's true name."
|
|
|
377 (file-truename (expand-file-name file default)))
|
|
|
378
|
|
|
379 (defun shadow-contract-file-name (file)
|
|
|
380 "Simplify FILENAME
|
|
|
381 by replacing (when possible) home directory with ~, and hostname with cluster
|
|
|
382 name that includes it. Filename should be absolute and true."
|
|
|
383 (let* ((hup (shadow-parse-path file))
|
|
|
384 (homedir (if (shadow-local-file hup)
|
|
|
385 shadow-homedir
|
|
|
386 (file-name-as-directory
|
|
|
387 (nth 2 (shadow-parse-fullpath
|
|
|
388 (expand-file-name
|
|
|
389 (shadow-make-fullpath
|
|
|
390 (nth 0 hup) (nth 1 hup) "~")))))))
|
|
|
391 (suffix (shadow-suffix homedir (nth 2 hup)))
|
|
|
392 (cluster (shadow-site-cluster (nth 0 hup))))
|
|
|
393 (shadow-make-fullpath
|
|
|
394 (if cluster
|
|
|
395 (shadow-cluster-name cluster)
|
|
|
396 (nth 0 hup))
|
|
|
397 (nth 1 hup)
|
|
|
398 (if suffix
|
|
|
399 (concat "~/" suffix)
|
|
|
400 (nth 2 hup)))))
|
|
|
401
|
|
|
402 (defun shadow-same-site (pattern file)
|
|
|
403 "True if the site of PATTERN and of FILE are on the same site.
|
|
|
404 If usernames are supplied, they must also match exactly. PATTERN and FILE may
|
|
100
|
405 be lists of host, user, path, or efs ftp pathnames. FILE may also be just a
|
|
0
|
406 local filename."
|
|
|
407 (let ((pattern-sup (shadow-parse-fullpath pattern))
|
|
|
408 (file-sup (shadow-parse-path file)))
|
|
|
409 (and
|
|
|
410 (shadow-site-match (nth 0 pattern-sup) (nth 0 file-sup))
|
|
|
411 (or (null (nth 1 pattern-sup))
|
|
|
412 (string-equal (nth 1 pattern-sup) (nth 1 file-sup))))))
|
|
|
413
|
|
|
414 (defun shadow-file-match (pattern file &optional regexp)
|
|
|
415 "Returns t if PATTERN matches FILE.
|
|
|
416 If REGEXP is supplied and nonnil, the pathname part of the pattern is a regular
|
|
|
417 expression, otherwise it must match exactly. The sites and usernames must
|
|
100
|
418 match---see shadow-same-site. The pattern must be in full efs ftp format, but
|
|
0
|
419 the file can be any valid filename. This function does not do any filename
|
|
|
420 expansion or contraction, you must do that yourself first."
|
|
|
421 (let* ((pattern-sup (shadow-parse-fullpath pattern))
|
|
|
422 (file-sup (shadow-parse-path file)))
|
|
|
423 (and (shadow-same-site pattern-sup file-sup)
|
|
|
424 (if regexp
|
|
|
425 (string-match (nth 2 pattern-sup) (nth 2 file-sup))
|
|
|
426 (string-equal (nth 2 pattern-sup) (nth 2 file-sup))))))
|
|
|
427
|
|
|
428 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
429 ;;; User-level Commands
|
|
|
430 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
431
|
|
|
432 (defun shadow-define-cluster (name)
|
|
|
433 "Edit \(or create) the definition of a cluster.
|
|
|
434 This is a group of hosts that share directories, so that copying to or from
|
|
|
435 one of them is sufficient to update the file on all of them. Clusters are
|
|
|
436 defined by a name, the network address of a primary host \(the one we copy
|
|
|
437 files to), and a regular expression that matches the hostnames of all the sites
|
|
|
438 in the cluster."
|
|
|
439 (interactive (list (completing-read "Cluster name: " shadow-clusters () ())))
|
|
|
440 (let* ((old (shadow-get-cluster name))
|
|
|
441 (primary (read-string "Primary host: "
|
|
|
442 (if old (shadow-cluster-primary old)
|
|
|
443 name)))
|
|
|
444 (regexp (let (try-regexp)
|
|
|
445 (while (not
|
|
|
446 (string-match
|
|
|
447 (setq try-regexp
|
|
|
448 (read-string
|
|
|
449 "Regexp matching all host names: "
|
|
|
450 (if old (shadow-cluster-regexp old)
|
|
|
451 (shadow-regexp-superquote primary))))
|
|
|
452 primary))
|
|
|
453 (message "Regexp doesn't include the primary host!")
|
|
|
454 (sit-for 2))
|
|
|
455 try-regexp))
|
|
|
456 ; (username (read-no-blanks-input
|
|
|
457 ; (format "Username [default: %s]: "
|
|
|
458 ; (shadow-get-user primary))
|
|
|
459 ; (if old (or (shadow-cluster-username old) "")
|
|
|
460 ; (user-login-name))))
|
|
|
461 )
|
|
|
462 ; (if (string-equal "" username) (setq username nil))
|
|
|
463 (shadow-set-cluster name primary regexp)))
|
|
|
464
|
|
|
465 (defun shadow-define-literal-group ()
|
|
|
466 "Declare a single file to be shared between sites.
|
|
|
467 It may have different filenames on each site. When this file is edited, the
|
|
|
468 new version will be copied to each of the other locations. Sites can be
|
|
|
469 specific hostnames, or names of clusters \(see shadow-define-cluster)."
|
|
|
470 (interactive)
|
|
|
471 (let* ((hup (shadow-parse-fullpath
|
|
|
472 (shadow-contract-file-name (buffer-file-name))))
|
|
|
473 (path (nth 2 hup))
|
|
|
474 user site group)
|
|
|
475 (while (setq site (shadow-read-site))
|
|
|
476 (setq user (read-string (format "Username [default %s]: "
|
|
|
477 (shadow-get-user site)))
|
|
|
478 path (read-string "Filename: " path))
|
|
|
479 (setq group (cons (shadow-make-fullpath site
|
|
|
480 (if (string-equal "" user)
|
|
|
481 (shadow-get-user site)
|
|
|
482 user)
|
|
|
483 path)
|
|
|
484 group)))
|
|
|
485 (setq shadow-literal-groups (cons group shadow-literal-groups)))
|
|
|
486 (shadow-write-info-file))
|
|
|
487
|
|
|
488 (defun shadow-define-regexp-group ()
|
|
|
489 "Make each of a group of files be shared between hosts.
|
|
|
490 Prompts for regular expression; files matching this are shared between a list
|
|
|
491 of sites, which are also prompted for. The filenames must be identical on all
|
|
|
492 hosts \(if they aren't, use shadow-define-group instead of this function).
|
|
|
493 Each site can be either a hostname or the name of a cluster \(see
|
|
|
494 shadow-define-cluster)."
|
|
|
495 (interactive)
|
|
|
496 (let ((regexp (read-string
|
|
|
497 "Filename regexp: "
|
|
|
498 (if (buffer-file-name)
|
|
|
499 (shadow-regexp-superquote
|
|
|
500 (nth 2
|
|
|
501 (shadow-parse-path
|
|
|
502 (shadow-contract-file-name
|
|
|
503 (buffer-file-name))))))))
|
|
|
504 site sites usernames)
|
|
|
505 (while (setq site (shadow-read-site))
|
|
|
506 (setq sites (cons site sites))
|
|
|
507 (setq usernames
|
|
|
508 (cons (read-string (format "Username for %s: " site)
|
|
|
509 (shadow-get-user site))
|
|
|
510 usernames)))
|
|
|
511 (setq shadow-regexp-groups
|
|
|
512 (cons (shadow-make-group regexp sites usernames)
|
|
|
513 shadow-regexp-groups))
|
|
|
514 (shadow-write-info-file)))
|
|
|
515
|
|
|
516 (defun shadow-shadows ()
|
|
|
517 ;; Mostly for debugging.
|
|
|
518 "Interactive function to display shadows of a buffer."
|
|
|
519 (interactive)
|
|
|
520 (let ((msg (shadow-join (mapcar (function cdr)
|
|
|
521 (shadow-shadows-of (buffer-file-name)))
|
|
|
522 " ")))
|
|
2
|
523 (message "%s"
|
|
|
524 (if (zerop (length msg))
|
|
0
|
525 "No shadows."
|
|
|
526 msg))))
|
|
|
527
|
|
|
528 (defun shadow-copy-files (&optional arg)
|
|
|
529 "Copy all pending shadow files.
|
|
|
530 With prefix argument, copy all pending files without query.
|
|
|
531 Pending copies are stored in variable shadow-files-to-copy, and in
|
|
|
532 shadow-todo-file if necessary. This function is invoked by
|
|
|
533 shadow-save-buffers-kill-emacs, so it is not usually necessary to
|
|
|
534 call it manually."
|
|
|
535 (interactive "P")
|
|
|
536 (if (and (not shadow-files-to-copy) (interactive-p))
|
|
|
537 (message "No files need to be shadowed.")
|
|
|
538 (save-excursion
|
|
|
539 (map-y-or-n-p (function
|
|
|
540 (lambda (pair)
|
|
|
541 (or arg shadow-noquery
|
|
|
542 (format "Copy shadow file %s? " (cdr pair)))))
|
|
|
543 (function shadow-copy-file)
|
|
|
544 shadow-files-to-copy
|
|
|
545 '("shadow" "shadows" "copy"))
|
|
|
546 (shadow-write-todo-file t))))
|
|
|
547
|
|
|
548 (defun shadow-cancel ()
|
|
|
549 "Cancel the instruction to copy some files.
|
|
|
550 Prompts for which copy operations to cancel. You will not be asked to copy
|
|
|
551 them again, unless you make more changes to the files. To cancel a shadow
|
|
|
552 permanently, remove the group from shadow-literal-groups or
|
|
|
553 shadow-regexp-groups."
|
|
|
554 (interactive)
|
|
|
555 (map-y-or-n-p (function (lambda (pair)
|
|
|
556 (format "Cancel copying %s to %s? "
|
|
|
557 (car pair) (cdr pair))))
|
|
|
558 (function (lambda (pair)
|
|
|
559 (shadow-remove-from-todo pair)))
|
|
|
560 shadow-files-to-copy
|
|
|
561 '("shadow" "shadows" "cancel copy"))
|
|
2
|
562 (message "There are %d shadows to be updated."
|
|
|
563 (length shadow-files-to-copy))
|
|
0
|
564 (shadow-write-todo-file))
|
|
|
565
|
|
|
566 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
567 ;;; Internal functions
|
|
|
568 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
569
|
|
|
570 (defun shadow-make-group (regexp sites usernames)
|
|
|
571 "Makes a description of a file group---
|
|
100
|
572 actually a list of regexp efs ftp file names---from REGEXP \(name of file to
|
|
0
|
573 be shadowed), list of SITES, and corresponding list of USERNAMES for each
|
|
|
574 site."
|
|
|
575 (if sites
|
|
|
576 (cons (shadow-make-fullpath (car sites) (car usernames) regexp)
|
|
|
577 (shadow-make-group regexp (cdr sites) (cdr usernames)))
|
|
|
578 nil))
|
|
|
579
|
|
|
580 (defun shadow-copy-file (s)
|
|
|
581 "Copy one shadow file."
|
|
|
582 (let* ((buffer
|
|
|
583 (cond ((get-file-buffer
|
|
|
584 (abbreviate-file-name (shadow-expand-file-name (car s)))))
|
|
|
585 ((not (file-readable-p (car s)))
|
|
|
586 (if (y-or-n-p
|
|
|
587 (format "Cannot find file %s--cancel copy request?"
|
|
|
588 (car s)))
|
|
|
589 (shadow-remove-from-todo s))
|
|
|
590 nil)
|
|
|
591 ((or (eq t shadow-noquery)
|
|
|
592 (y-or-n-p
|
|
|
593 (format "No buffer for %s -- update shadow anyway?"
|
|
|
594 (car s))))
|
|
|
595 (find-file-noselect (car s)))))
|
|
|
596 (to (shadow-expand-cluster-in-file-name (cdr s))))
|
|
|
597 (shadow-when buffer
|
|
|
598 (set-buffer buffer)
|
|
|
599 (save-restriction
|
|
|
600 (widen)
|
|
|
601 (condition-case i
|
|
|
602 (progn
|
|
|
603 (write-region (point-min) (point-max) to)
|
|
|
604 (shadow-remove-from-todo s))
|
|
2
|
605 (error (message "Shadow %s not updated!" (cdr s))))))))
|
|
0
|
606
|
|
|
607 (defun shadow-shadows-of (file)
|
|
|
608 "Returns copy operations needed to update FILE.
|
|
|
609 Filename should have clusters expanded, but otherwise can have any format.
|
|
|
610 Return value is a list of dotted pairs like \(from . to), where from
|
|
|
611 and to are absolute file names."
|
|
|
612 (or (symbol-value (intern-soft file shadow-hashtable))
|
|
|
613 (let* ((absolute-file (shadow-expand-file-name
|
|
|
614 (or (shadow-local-file file) file)
|
|
|
615 shadow-homedir))
|
|
|
616 (canonical-file (shadow-contract-file-name absolute-file))
|
|
|
617 (shadows
|
|
|
618 (mapcar (function (lambda (shadow)
|
|
|
619 (cons absolute-file shadow)))
|
|
|
620 (append
|
|
|
621 (shadow-shadows-of-1
|
|
|
622 canonical-file shadow-literal-groups nil)
|
|
|
623 (shadow-shadows-of-1
|
|
|
624 canonical-file shadow-regexp-groups t)))))
|
|
|
625 (set (intern file shadow-hashtable) shadows))))
|
|
|
626
|
|
|
627 (defun shadow-shadows-of-1 (file groups regexp)
|
|
|
628 "Return list of FILE's shadows in GROUPS,
|
|
|
629 which are considered as regular expressions if third arg REGEXP is true."
|
|
|
630 (if groups
|
|
|
631 (let ((nonmatching
|
|
|
632 (shadow-remove-if
|
|
|
633 (function (lambda (x) (shadow-file-match x file regexp)))
|
|
|
634 (car groups))))
|
|
|
635 (append (cond ((equal nonmatching (car groups)) nil)
|
|
|
636 (regexp
|
|
|
637 (let ((realpath (nth 2 (shadow-parse-fullpath file))))
|
|
|
638 (mapcar
|
|
|
639 (function
|
|
|
640 (lambda (x)
|
|
|
641 (shadow-replace-path-component x realpath)))
|
|
|
642 nonmatching)))
|
|
|
643 (t nonmatching))
|
|
|
644 (shadow-shadows-of-1 file (cdr groups) regexp)))))
|
|
|
645
|
|
|
646 (defun shadow-add-to-todo ()
|
|
|
647 "If current buffer has shadows, add them to the list
|
|
|
648 of files needing to be copied."
|
|
|
649 (let ((shadows (shadow-shadows-of
|
|
|
650 (shadow-expand-file-name
|
|
|
651 (buffer-file-name (current-buffer))))))
|
|
|
652 (shadow-when shadows
|
|
|
653 (setq shadow-files-to-copy
|
|
|
654 (shadow-union shadows shadow-files-to-copy))
|
|
|
655 (shadow-when (not shadow-inhibit-message)
|
|
2
|
656 (message "%s" (substitute-command-keys
|
|
|
657 "Use \\[shadow-copy-files] to update shadows."))
|
|
0
|
658 (sit-for 1))
|
|
|
659 (shadow-write-todo-file)))
|
|
|
660 nil) ; Return nil for write-file-hooks
|
|
|
661
|
|
|
662 (defun shadow-remove-from-todo (pair)
|
|
|
663 "Remove PAIR from shadow-files-to-copy.
|
|
|
664 PAIR must be (eq to) one of the elements of that list."
|
|
|
665 (setq shadow-files-to-copy
|
|
|
666 (shadow-remove-if (function (lambda (s) (eq s pair)))
|
|
|
667 shadow-files-to-copy)))
|
|
|
668
|
|
|
669 (defun shadow-read-files ()
|
|
|
670 "Visits and loads shadow-info-file and shadow-todo-file,
|
|
|
671 thus restoring shadowfile's state from your last emacs session.
|
|
|
672 Returns t unless files were locked; then returns nil."
|
|
|
673 (interactive)
|
|
|
674 (if (and (fboundp 'file-locked-p)
|
|
|
675 (or (stringp (file-locked-p shadow-info-file))
|
|
|
676 (stringp (file-locked-p shadow-todo-file))))
|
|
|
677 (progn
|
|
|
678 (message "Shadowfile is running in another emacs; can't have two.")
|
|
|
679 (beep)
|
|
|
680 (sit-for 3)
|
|
|
681 nil)
|
|
|
682 (save-excursion
|
|
|
683 (shadow-when shadow-info-file
|
|
|
684 (set-buffer (setq shadow-info-buffer
|
|
|
685 (find-file-noselect shadow-info-file)))
|
|
|
686 (shadow-when (and (not (buffer-modified-p))
|
|
|
687 (file-newer-than-file-p (make-auto-save-file-name)
|
|
|
688 shadow-info-file))
|
|
|
689 (erase-buffer)
|
|
|
690 (message "Data recovered from %s."
|
|
|
691 (car (insert-file-contents (make-auto-save-file-name))))
|
|
|
692 (sit-for 1))
|
|
|
693 (eval-current-buffer))
|
|
|
694 (shadow-when shadow-todo-file
|
|
|
695 (set-buffer (setq shadow-todo-buffer
|
|
|
696 (find-file-noselect shadow-todo-file)))
|
|
|
697 (shadow-when (and (not (buffer-modified-p))
|
|
|
698 (file-newer-than-file-p (make-auto-save-file-name)
|
|
|
699 shadow-todo-file))
|
|
|
700 (erase-buffer)
|
|
|
701 (message "Data recovered from %s."
|
|
|
702 (car (insert-file-contents (make-auto-save-file-name))))
|
|
|
703 (sit-for 1))
|
|
|
704 (eval-current-buffer nil))
|
|
|
705 (shadow-invalidate-hashtable))
|
|
|
706 t))
|
|
|
707
|
|
|
708 (defun shadow-write-info-file ()
|
|
|
709 "Write out information to shadow-info-file.
|
|
|
710 Also clears shadow-hashtable, since when there are new shadows defined, the old
|
|
|
711 hashtable info is invalid."
|
|
|
712 (shadow-invalidate-hashtable)
|
|
|
713 (if shadow-info-file
|
|
|
714 (save-excursion
|
|
|
715 (if (not shadow-info-buffer)
|
|
|
716 (setq shadow-info-buffer (find-file-noselect shadow-info-file)))
|
|
|
717 (set-buffer shadow-info-buffer)
|
|
|
718 (delete-region (point-min) (point-max))
|
|
|
719 (shadow-insert-var 'shadow-clusters)
|
|
|
720 (shadow-insert-var 'shadow-literal-groups)
|
|
|
721 (shadow-insert-var 'shadow-regexp-groups))))
|
|
|
722
|
|
|
723 (defun shadow-write-todo-file (&optional save)
|
|
|
724 "Write out information to shadow-todo-file.
|
|
|
725 With nonnil argument also saves the buffer."
|
|
|
726 (save-excursion
|
|
|
727 (if (not shadow-todo-buffer)
|
|
|
728 (setq shadow-todo-buffer (find-file-noselect shadow-todo-file)))
|
|
|
729 (set-buffer shadow-todo-buffer)
|
|
|
730 (delete-region (point-min) (point-max))
|
|
|
731 (shadow-insert-var 'shadow-files-to-copy)
|
|
|
732 (if save (shadow-save-todo-file))))
|
|
|
733
|
|
|
734 (defun shadow-save-todo-file ()
|
|
|
735 (if (and shadow-todo-buffer (buffer-modified-p shadow-todo-buffer))
|
|
|
736 (save-excursion
|
|
|
737 (set-buffer shadow-todo-buffer)
|
|
|
738 (condition-case nil ; have to continue even in case of
|
|
|
739 (basic-save-buffer) ; error, otherwise kill-emacs might
|
|
|
740 (error ; not work!
|
|
|
741 (message "WARNING: Can't save shadow todo file; it is locked!")
|
|
|
742 (sit-for 1))))))
|
|
|
743
|
|
|
744 (defun shadow-invalidate-hashtable ()
|
|
|
745 (setq shadow-hashtable (make-vector 37 0)))
|
|
|
746
|
|
|
747 (defun shadow-insert-var (variable)
|
|
|
748 "Prettily insert a setq command for VARIABLE.
|
|
|
749 which, when later evaluated, will restore it to its current setting.
|
|
|
750 SYMBOL must be the name of a variable whose value is a list."
|
|
|
751 (let ((standard-output (current-buffer)))
|
|
|
752 (insert (format "(setq %s" variable))
|
|
|
753 (cond ((consp (eval variable))
|
|
|
754 (insert "\n '(")
|
|
|
755 (prin1 (car (eval variable)))
|
|
|
756 (let ((rest (cdr (eval variable))))
|
|
|
757 (while rest
|
|
|
758 (insert "\n ")
|
|
|
759 (prin1 (car rest))
|
|
|
760 (setq rest (cdr rest)))
|
|
|
761 (insert "))\n\n")))
|
|
|
762 (t (insert " ")
|
|
|
763 (prin1 (eval variable))
|
|
|
764 (insert ")\n\n")))))
|
|
|
765
|
|
|
766 (defun shadow-save-buffers-kill-emacs (&optional arg)
|
|
|
767 "Offer to save each buffer and copy shadows, then kill this Emacs process.
|
|
|
768 With prefix arg, silently save all file-visiting buffers, then kill.
|
|
|
769
|
|
|
770 Extended by shadowfile to automatically save `shadow-todo-file' and
|
|
|
771 look for files that have been changed and need to be copied to other systems."
|
|
|
772 ;; This function is necessary because we need to get control and save
|
|
|
773 ;; the todo file /after/ saving other files, but /before/ the warning
|
|
|
774 ;; message about unsaved buffers (because it can get modified by the
|
|
|
775 ;; action of saving other buffers). `kill-emacs-hook' is no good
|
|
|
776 ;; because it is not called at the correct time, and also because it is
|
|
|
777 ;; called when the terminal is disconnected and we cannot ask whether
|
|
|
778 ;; to copy files.
|
|
|
779 (interactive "P")
|
|
|
780 (shadow-save-todo-file)
|
|
|
781 (save-some-buffers arg t)
|
|
|
782 (shadow-copy-files)
|
|
|
783 (shadow-save-todo-file)
|
|
|
784 (and (or (not (memq t (mapcar (function
|
|
|
785 (lambda (buf) (and (buffer-file-name buf)
|
|
|
786 (buffer-modified-p buf))))
|
|
|
787 (buffer-list))))
|
|
|
788 (yes-or-no-p "Modified buffers exist; exit anyway? "))
|
|
|
789 (or (not (fboundp 'process-list))
|
|
|
790 ;; process-list is not defined on VMS.
|
|
|
791 (let ((processes (process-list))
|
|
|
792 active)
|
|
|
793 (while processes
|
|
|
794 (and (memq (process-status (car processes)) '(run stop open))
|
|
|
795 (let ((val (process-kill-without-query (car processes))))
|
|
|
796 (process-kill-without-query (car processes) val)
|
|
|
797 val)
|
|
|
798 (setq active t))
|
|
|
799 (setq processes (cdr processes)))
|
|
|
800 (or (not active)
|
|
|
801 (yes-or-no-p "Active processes exist; kill them and exit anyway? "))))
|
|
|
802 (kill-emacs)))
|
|
|
803
|
|
|
804 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
805 ;;; Lucid Emacs compatibility
|
|
|
806 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
807
|
|
|
808 ;; This is on hold until someone tells me about a working version of
|
|
|
809 ;; map-ynp for Lucid Emacs.
|
|
|
810
|
|
|
811 ;(shadow-when (string-match "Lucid" emacs-version)
|
|
|
812 ; (require 'symlink-fix)
|
|
100
|
813 ; (require 'efs-auto)
|
|
0
|
814 ; (require 'map-ynp)
|
|
|
815 ; (if (not (fboundp 'file-truename))
|
|
|
816 ; (fset 'shadow-expand-file-name
|
|
|
817 ; (symbol-function 'symlink-expand-file-name)))
|
|
100
|
818 ; (if (not (fboundp 'efs-ftp-name))
|
|
|
819 ; (fset 'efs-ftp-name
|
|
|
820 ; (symbol-function 'efs-ftp-path))))
|
|
0
|
821
|
|
|
822 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
823 ;;; Hook us up
|
|
|
824 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
825
|
|
|
826 ;;; File shadowing is activated at load time, unless this this file is
|
|
|
827 ;;; being preloaded, in which case it is added to after-init-hook.
|
|
|
828 ;;; Thanks to Richard Caley for this scheme.
|
|
|
829
|
|
|
830 (defun shadow-initialize ()
|
|
|
831 (if (null shadow-homedir)
|
|
|
832 (setq shadow-homedir
|
|
|
833 (file-name-as-directory (shadow-expand-file-name "~"))))
|
|
|
834 (if (null shadow-info-file)
|
|
|
835 (setq shadow-info-file
|
|
|
836 (shadow-expand-file-name "~/.shadows")))
|
|
|
837 (if (null shadow-todo-file)
|
|
|
838 (setq shadow-todo-file
|
|
|
839 (shadow-expand-file-name "~/.shadow_todo")))
|
|
|
840 (if (not (shadow-read-files))
|
|
|
841 (progn
|
|
|
842 (message "Shadowfile information files not found - aborting")
|
|
|
843 (beep)
|
|
|
844 (sit-for 3))
|
|
|
845 (shadow-when (and (not shadow-inhibit-overload)
|
|
|
846 (not (fboundp 'shadow-orig-save-buffers-kill-emacs)))
|
|
|
847 (fset 'shadow-orig-save-buffers-kill-emacs
|
|
|
848 (symbol-function 'save-buffers-kill-emacs))
|
|
|
849 (fset 'save-buffers-kill-emacs
|
|
|
850 (symbol-function 'shadow-save-buffers-kill-emacs)))
|
|
|
851 (add-hook 'write-file-hooks 'shadow-add-to-todo)
|
|
|
852 (define-key ctl-x-4-map "s" 'shadow-copy-files)))
|
|
|
853
|
|
|
854 (if noninteractive
|
|
|
855 (add-hook 'after-init-hook 'shadow-initialize)
|
|
|
856 (shadow-initialize))
|
|
|
857
|
|
|
858 ;;;Local Variables:
|
|
|
859 ;;;eval:(put 'shadow-when 'lisp-indent-hook 1)
|
|
|
860 ;;;End:
|
|
|
861
|
|
|
862 ;;; shadowfile.el ends here
|
