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209
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1 ;;; packages.el --- Low level support for XEmacs packages
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2
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3 ;; Copyright (C) 1997 Free Software Foundation, Inc.
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4
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5 ;; Author: Steven L Baur <steve@altair.xemacs.org>
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235
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6 ;; Maintainer: Steven L Baur <steve@altair.xemacs.org>
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209
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7 ;; Keywords: internal, lisp, dumped
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8
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9 ;; This file is part of XEmacs.
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10
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11 ;; XEmacs is free software; you can redistribute it and/or modify it
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12 ;; under the terms of the GNU General Public License as published by
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13 ;; the Free Software Foundation; either version 2, or (at your option)
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14 ;; any later version.
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15
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16 ;; XEmacs is distributed in the hope that it will be useful, but
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17 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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19 ;; General Public License for more details.
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20
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21 ;; You should have received a copy of the GNU General Public License
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22 ;; along with XEmacs; see the file COPYING. If not, write to the Free
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23 ;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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24 ;; 02111-1307, USA.
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25
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26 ;;; Synched up with: Not in FSF
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27
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28 ;;; Commentary:
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29
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30 ;; This file is dumped with XEmacs.
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31
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32 ;; This file provides low level facilities for XEmacs startup --
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33 ;; particularly regarding the package setup. This code has to run in
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34 ;; what we call "bare temacs" -- i.e. XEmacs without the usual Lisp
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35 ;; environment. Pay special attention:
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36
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37 ;; - not to use the `lambda' macro. Use #'(lambda ...) instead.
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38 ;; (this goes for any package loaded before `subr.el'.)
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39 ;;
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40 ;; - not to use macros, because they are not yet available (and this
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41 ;; file must be loadable uncompiled.) This rules out CL-style
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42 ;; macros like `when', for instance.
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43 ;;
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44 ;; - not to use `defcustom'. If you must add user-customizable
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45 ;; variables here, use `defvar', and add the variable to
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46 ;; `cus-start.el'.
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47
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48 ;; Because of all this, make sure that the stuff you put here really
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49 ;; belongs here.
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50
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267
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51 ;; This file requires find-paths.el.
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209
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52
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53 ;;; Code:
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54
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227
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55 ;;; Package versioning
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56
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57 (defvar packages-package-list nil
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58 "database of loaded packages and version numbers")
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59
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267
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60 (defvar early-packages nil
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61 "Packages early in the load path.")
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62
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63 (defvar early-package-load-path nil
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64 "Load path for packages early in the load path.")
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65
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66 (defvar early-packages nil
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67 "Packages late in the load path.")
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68
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69 (defvar late-package-load-path nil
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70 "Load path for packages late in the load path.")
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71
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235
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72 (defun package-get-key-1 (info key)
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73 "Locate keyword `key' in list."
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74 (cond ((null info)
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75 nil)
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76 ((eq (car info) key)
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77 (nth 1 info))
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78 (t (package-get-key-1 (cddr info) key))))
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79
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80 (defun package-get-key (name key)
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81 "Get info `key' from package `name'."
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82 (let ((info (assq name packages-package-list)))
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83 (when info
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84 (package-get-key-1 (cdr info) key))))
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85
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86 (defun package-provide (name &rest attributes)
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87 (let ((info (if (and attributes (floatp (car attributes)))
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88 (list :version (car attributes))
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89 attributes)))
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90 (remassq name packages-package-list)
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91 (setq packages-package-list
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92 (cons (cons name info) packages-package-list))))
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227
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93
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94 (defun package-require (name version)
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95 (let ((pkg (assq name packages-package-list)))
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96 (cond ((null pkg)
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97 (error "Package %s has not been loaded into this XEmacsen"
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98 name))
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239
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99 ((< (package-get-key name :version) version)
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227
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100 (error "Need version %g of package %s, got version %g"
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101 version name (cdr pkg)))
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102 (t t))))
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103
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104 ;;; Build time stuff
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105
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209
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106 (defvar autoload-file-name "auto-autoloads.el"
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107 "Filename that autoloads are expected to be found in.")
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108
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109 (defvar packages-hardcoded-lisp
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110 '(
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253
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111 #+infodock "id-vers"
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112 #+infodock "easymenu-id-xemacs"
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209
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113 )
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114 "Lisp packages that are always dumped with XEmacs")
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115
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116 (defvar packages-useful-lisp
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117 '("bytecomp"
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118 "byte-optimize"
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119 "shadow"
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120 "cl-macs")
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121 "Lisp packages that need early byte compilation.")
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122
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123 (defvar packages-unbytecompiled-lisp
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124 '("paths.el"
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227
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125 "dumped-lisp.el"
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126 "dumped-pkg-lisp.el"
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261
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127 "version.el"
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128 "Installation.el")
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209
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129 "Lisp packages that should not be byte compiled.")
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130
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131
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132 ;; Copied from help.el, could possibly move it to here permanently.
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133 ;; Unlike the FSF version, our `locate-library' uses the `locate-file'
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134 ;; primitive, which should make it lightning-fast.
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135
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136 (defun locate-library (library &optional nosuffix path interactive-call)
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137 "Show the precise file name of Emacs library LIBRARY.
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138 This command searches the directories in `load-path' like `M-x load-library'
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139 to find the file that `M-x load-library RET LIBRARY RET' would load.
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140 Optional second arg NOSUFFIX non-nil means don't add suffixes `.elc' or `.el'
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141 to the specified name LIBRARY.
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142
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143 If the optional third arg PATH is specified, that list of directories
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144 is used instead of `load-path'."
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145 (interactive (list (read-string "Locate library: ")
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146 nil nil
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147 t))
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148 (let ((result
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149 (locate-file
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150 library
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151 (or path load-path)
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152 (cond ((or (rassq 'jka-compr-handler file-name-handler-alist)
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153 (and (boundp 'find-file-hooks)
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154 (member 'crypt-find-file-hook find-file-hooks)))
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155 ;; Compression involved.
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156 (if nosuffix
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157 ":.gz:.Z"
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158 ".elc:.elc.gz:elc.Z:.el:.el.gz:.el.Z::.gz:.Z"))
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159 (t
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160 ;; No compression.
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161 (if nosuffix
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162 ""
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163 ".elc:.el:")))
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164 4)))
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165 (and interactive-call
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166 (if result
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167 (message "Library is file %s" result)
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168 (message "No library %s in search path" library)))
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169 result))
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170
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171 (defun packages-add-suffix (str)
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172 (if (null (string-match "\\.el\\'" str))
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173 (concat str ".elc")
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174 str))
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175
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235
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176 (defun packages-list-autoloads-path ()
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209
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177 "List autoloads from precomputed load-path."
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178 (let ((path load-path)
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179 autoloads)
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180 (while path
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181 (if (file-exists-p (concat (car path)
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182 autoload-file-name))
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183 (setq autoloads (cons (concat (car path)
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184 autoload-file-name)
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185 autoloads)))
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186 (setq path (cdr path)))
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187 autoloads))
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188
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235
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189 (defun packages-list-autoloads ()
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209
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190 "List autoload files in (what will be) the normal lisp search path.
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191 This function is used during build to find where the global symbol files so
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192 they can be perused for their useful information."
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193 ;; Source directory may not be initialized yet.
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194 ;; (print (prin1-to-string load-path))
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195 (if (null source-directory)
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215
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196 (setq source-directory (concat (car load-path) "./")))
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235
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197 (let ((files (directory-files (file-name-as-directory source-directory)
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198 t ".*"))
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209
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199 file autolist)
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215
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200 ;; (print (prin1-to-string source-directory))
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201 ;; (print (prin1-to-string files))
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209
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202 (while (setq file (car-safe files))
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203 (if (and (file-directory-p file)
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204 (file-exists-p (concat file "/" autoload-file-name)))
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205 (setq autolist (cons (concat file "/" autoload-file-name)
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206 autolist)))
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207 (setq files (cdr files)))
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208 autolist))
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209
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235
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210 ;; The following function cannot be called from a bare temacs
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211 (defun packages-new-autoloads ()
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212 "Return autoloads files that have been added or modified since XEmacs dump."
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213 (require 'loadhist)
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214 (let ((me (concat invocation-directory invocation-name))
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215 (path load-path)
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216 result dir)
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217 (while path
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218 (setq dir (file-truename (car path)))
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219 (let ((autoload-file (file-name-sans-extension (concat
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220 dir
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221 autoload-file-name))))
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222 ;; Check for:
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223 ;; 1. An auto-autoload file that hasn't provided a feature (because
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224 ;; it has been installed since XEmacs was dumped).
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225 ;; 2. auto-autoload.el being newer than the executable
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226 ;; 3. auto-autoload.elc being newer than the executable (the .el
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227 ;; could be missing or compressed)
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228 (when (or (and (null (file-provides autoload-file))
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229 (or (file-exists-p (concat autoload-file ".elc"))
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230 (file-exists-p (concat autoload-file ".el"))))
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231 (and (file-newer-than-file-p (concat autoload-file ".el") me)
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232 (setq autoload-file (concat autoload-file ".el")))
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233 (and (file-newer-than-file-p (concat autoload-file
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234 ".elc")
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235 me)
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236 (setq autoload-file (concat autoload-file ".elc"))))
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237 (push autoload-file result)))
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238 (setq path (cdr path)))
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239 result))
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240
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241 ;; The following function cannot be called from a bare temacs
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242 (defun packages-reload-autoloads ()
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243 "Reload new or updated auto-autoloads files.
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244 This is an extremely dangerous function to call after the user-init-files
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245 is run. Don't call it or you'll be sorry."
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246 (let ((autoload-list (packages-new-autoloads)))
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247 (while autoload-list
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248 (let* ((autoload-file (car autoload-list))
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249 (feature (car-safe (file-provides autoload-file))))
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250 (when feature
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251 ;; (message "(unload-feature %S)" feature)
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252 (unload-feature feature))
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237
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253 (condition-case nil
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254 (load autoload-file)
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255 (t nil)))
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235
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256 (setq autoload-list (cdr autoload-list)))))
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257
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258 ;; The following function cannot be called from a bare temacs
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259 (defun packages-reload-dumped-lisp ()
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260 "Reload new or updated dumped lisp files (with exceptions).
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261 This is an extremely dangerous function to call at any time."
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262 ;; Nothing for the moment
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263 nil)
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264
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209
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265 ;; Data-directory is really a list now. Provide something to search it for
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266 ;; directories.
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267
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268 (defun locate-data-directory (name &optional dir-list)
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269 "Locate a directory in a search path DIR-LIST (a list of directories).
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270 If no DIR-LIST is supplied, it defaults to `data-directory-list'."
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271 (unless dir-list
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272 (setq dir-list data-directory-list))
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273 (let (found found-dir)
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274 (while (and (null found-dir) dir-list)
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275 (setq found (concat (car dir-list) name "/")
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276 found-dir (file-directory-p found))
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277 (or found-dir
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278 (setq found nil))
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279 (setq dir-list (cdr dir-list)))
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280 found))
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281
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215
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282 ;; Data-directory is really a list now. Provide something to search it for
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283 ;; files.
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284
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285 (defun locate-data-file (name &optional dir-list)
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286 "Locate a file in a search path DIR-LIST (a list of directories).
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239
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287 If no DIR-LIST is supplied, it defaults to `data-directory-list'.
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288 This function is basically a wrapper over `locate-file'."
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215
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289 (unless dir-list
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290 (setq dir-list data-directory-list))
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239
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291 (locate-file name dir-list))
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215
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292
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267
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293 ;; Path setup
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294
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295 (defun packages-find-package-path (roots)
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296 "Construct the package path underneath installation roots ROOTS."
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297 (let ((envvar-value (getenv "EMACSPACKAGEPATH")))
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298 (if envvar-value
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299 (decode-path-internal envvar-value)
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300 (let ((site-base-directory (paths-find-site-directory roots "packages"))
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301 (version-base-directory (paths-find-version-directory roots "packages")))
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302 (if (or site-base-directory version-base-directory)
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303 (let ((site-mule-directory
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304 (and (featurep 'mule)
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305 (paths-find-site-directory roots
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306 "mule-packages")))
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307 (version-mule-directory
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308 (and (featurep 'mule)
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309 (paths-find-version-directory roots
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310 "mule-packages"))))
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311 (append '("~/.xemacs/")
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312 '(nil)
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313 (and version-mule-directory
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314 (null (string-equal version-mule-directory
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315 site-mule-directory))
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316 (list version-mule-directory))
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317 (and site-mule-directory
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318 (list site-mule-directory))
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319 (and version-base-directory
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320 (null (string-equal version-base-directory
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321 site-base-directory))
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322 (list version-base-directory))
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323 (and site-base-directory
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324 (list site-base-directory))))
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325 configure-package-path)))))
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326
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327 (defvar packages-special-bases '("etc" "info" "lisp" "lib-src" "bin")
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328 "Special subdirectories of packages.")
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329
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330 (defun packages-find-packages-in-directories (directories)
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331 "Find all packages underneath directories in DIRECTORIES."
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332 (paths-find-recursive-path directories
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333 (append paths-version-control-bases
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334 packages-special-bases)))
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335
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336 (defun packages-split-path (path)
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337 "Split PATH at NIL, return pair with two components.
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338 The second component is shared with PATH."
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269
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339 (let ((reverse-tail '()))
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267
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340 (while (and path (null (null (car path))))
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269
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341 (setq reverse-tail (cons (car path) reverse-tail))
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267
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342 (setq path (cdr path)))
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343 (if (null path)
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269
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344 (cons nil (nreverse reverse-tail))
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345 (cons (nreverse reverse-tail) (cdr path)))))
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267
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346
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347 (defun packages-find-packages (package-path &optional inhibit)
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348 "Search for all packages in PACKAGE-PATH.
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349 PACKAGE-PATH may distinguish (by NIL-separation) between early
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350 and late packages.
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351 If INHIBIT is non-NIL, return empty paths.
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352 This returns (CONS EARLY-PACKAGES LATE-PACKAGES)."
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353 (if inhibit
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354 (cons '() '())
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355 (let* ((stuff (packages-split-path package-path))
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356 (early (car stuff))
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357 (late (cdr stuff)))
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358 (cons (packages-find-packages-in-directories early)
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359 (packages-find-packages-in-directories late)))))
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360
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361 (defun packages-find-package-library-path (packages suffixes)
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362 "Construct a path into a component of the packages hierarchy.
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363 PACKAGES is a list of package directories.
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364 SUFFIXES is a list of names of package subdirectories to look for."
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365 (let ((directories
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366 (apply
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367 #'append
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368 (mapcar #'(lambda (package)
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369 (mapcar #'(lambda (suffix)
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370 (concat package suffix))
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371 suffixes))
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372 packages))))
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373 (paths-directories-which-exist directories)))
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374
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375 (defun packages-find-package-load-path (packages)
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376 "Construct the load-path component for packages.
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377 PACKAGES is a list of package directories."
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378 (paths-find-recursive-load-path
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379 (packages-find-package-library-path packages '("lisp/"))))
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380
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381 (defun packages-find-package-exec-path (packages)
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382 (packages-find-package-library-path packages
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383 (list (concat "bin/" system-configuration "/")
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384 "lib-src/")))
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385
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386 (defun packages-find-package-info-path (packages)
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387 (packages-find-package-library-path packages '("info/")))
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388
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389 (defun packages-find-package-data-path (packages)
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390 (packages-find-package-library-path packages '("etc/")))
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391
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392 ;; Loading package initialization files
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393
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394 (defun packages-load-package-lisps (package-load-path base)
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395 "Load all Lisp files of a certain name along a load path.
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396 BASE is the base name of the files."
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397 (mapc #'(lambda (dir)
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398 (let ((file-name (expand-file-name base dir)))
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399 (if (file-exists-p file-name)
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400 (condition-case error
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401 (load file-name)
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402 (error
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403 (warn (format "Autoload error in: %s:\n\t%s"
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404 file-name
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405 (with-output-to-string
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406 (display-error error nil)))))))))
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407 package-load-path))
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408
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409 (defun packages-load-package-auto-autoloads (package-load-path)
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410 "Load auto-autoload files along a load path."
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411 (packages-load-package-lisps package-load-path
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412 (file-name-sans-extension autoload-file-name)))
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413
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414 (defun packages-handle-package-dumped-lisps (handle package-load-path)
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415 "Load dumped-lisp.el files along a load path.
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416 Call HANDLE on each file off definitions of PACKAGE-LISP there."
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417 (mapc #'(lambda (dir)
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418 (let ((file-name (expand-file-name "dumped-lisp.el" dir)))
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419 (if (file-exists-p file-name)
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420 (let (package-lisp
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421 ;; 20.4 packages could set this
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422 preloaded-file-list)
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423 (load file-name)
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424 ;; dumped-lisp.el could have set this ...
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425 (if package-lisp
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426 (mapc #'(lambda (base)
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427 (funcall handle (expand-file-name base dir)))
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428 package-lisp))))))
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429 package-load-path))
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430
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431 (defun packages-load-package-dumped-lisps (package-load-path)
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432 "Load dumped-lisp.el files along a load path.
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433 Also load files off PACKAGE-LISP definitions there"
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434 (packages-handle-package-dumped-lisps #'load package-load-path))
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435
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436 (defun packages-collect-package-dumped-lisps (package-load-path)
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437 "Load dumped-lisp.el files along a load path.
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438 Return list of files off PACKAGE-LISP definitions there"
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439 (let ((*files* '()))
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440 (packages-handle-package-dumped-lisps
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441 #'(lambda (file)
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442 (setq *files* (cons (file-name-nondirectory file)
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443 *files*)))
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444 package-load-path)
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445 (reverse *files*)))
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209
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446
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447 (provide 'packages)
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448
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449 ;;; packages.el ends here
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