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163
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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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6 ;; Keywords: internal, lisp
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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 ;;; Synched up with: Not in FSF
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26
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27 ;;; Commentary:
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28
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29 ;; This file provides low level facilities for XEmacs startup. Special
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30 ;; requirements apply to some of these functions because they can be called
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31 ;; during build from temacs and much of the usual lisp environment may
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32 ;; be missing.
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33
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34 ;;; Code:
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35
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36 (defvar autoload-file-name "auto-autoloads.el"
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37 "Filename that autoloads are expected to be found in.")
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38
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39 (defvar packages-hardcoded-lisp
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40 '("cl-defs"
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171
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41 ;; "startup"
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163
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42 )
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43 "Lisp packages that are always dumped with XEmacs")
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44
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45 (defvar packages-useful-lisp
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46 '("bytecomp"
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47 "byte-optimize"
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48 "advice")
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49 "Lisp packages that need early byte compilation.")
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50
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51 (defvar packages-unbytecompiled-lisp
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52 '("paths.el"
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53 "version.el")
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54 "Lisp packages that should not be byte compiled.")
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55
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56 ;; Copied from subr.el
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177
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57 (defmacro lambda (&rest cdr)
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58 "Return a lambda expression.
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59 A call of the form (lambda ARGS DOCSTRING INTERACTIVE BODY) is
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60 self-quoting; the result of evaluating the lambda expression is the
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61 expression itself. The lambda expression may then be treated as a
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62 function, i.e., stored as the function value of a symbol, passed to
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63 funcall or mapcar, etc.
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64
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65 ARGS should take the same form as an argument list for a `defun'.
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66 DOCSTRING is an optional documentation string.
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67 If present, it should describe how to call the function.
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68 But documentation strings are usually not useful in nameless functions.
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69 INTERACTIVE should be a call to the function `interactive', which see.
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70 It may also be omitted.
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71 BODY should be a list of lisp expressions."
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72 ;; Note that this definition should not use backquotes; subr.el should not
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73 ;; depend on backquote.el.
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74 ;; #### - I don't see why. So long as backquote.el doesn't use anything
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75 ;; from subr.el, there's no problem with using backquotes here. --Stig
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76 ;;(list 'function (cons 'lambda cdr)))
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77 ;; -slb, This has to run in a naked temacs. Enough is enough.
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78 ;; `(function (lambda ,@cdr)))
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79 (list 'function (cons 'lambda cdr)))
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163
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80
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81 ;; Copied from help.el, could possibly move it to here permanently.
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82 ;; This is taken directly from Emacs 19.34.94.
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83
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84 (defun locate-library (library &optional nosuffix path interactive-call)
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85 "Show the precise file name of Emacs library LIBRARY.
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86 This command searches the directories in `load-path' like `M-x load-library'
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87 to find the file that `M-x load-library RET LIBRARY RET' would load.
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88 Optional second arg NOSUFFIX non-nil means don't add suffixes `.elc' or `.el'
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89 to the specified name LIBRARY.
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90
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91 If the optional third arg PATH is specified, that list of directories
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92 is used instead of `load-path'."
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93 (interactive (list (read-string "Locate library: ")
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94 nil nil
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95 t))
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96 (let (result)
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97 (catch 'answer
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98 (mapcar
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99 (lambda (dir)
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100 (mapcar
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101 (lambda (suf)
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102 (let ((try (expand-file-name (concat library suf) dir)))
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103 (and (file-readable-p try)
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104 (null (file-directory-p try))
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105 (progn
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106 (setq result try)
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107 (throw 'answer try)))))
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108 (if nosuffix
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109 '("")
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110 (let ((basic '(".elc" ".el" ""))
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111 (compressed '(".Z" ".gz" "")))
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112 ;; If autocompression mode is on,
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113 ;; consider all combinations of library suffixes
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114 ;; and compression suffixes.
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115 (if (rassq 'jka-compr-handler file-name-handler-alist)
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116 (apply 'nconc
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117 (mapcar (lambda (compelt)
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118 (mapcar (lambda (baselt)
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119 (concat baselt compelt))
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120 basic))
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121 compressed))
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122 basic)))))
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123 (or path load-path)))
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124 (and interactive-call
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125 (if result
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126 (message "Library is file %s" result)
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127 (message "No library %s in search path" library)))
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128 result))
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129
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130 (defun packages-add-suffix (str)
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131 (if (null (string-match "\\.el\\'" str))
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132 (concat str ".elc")
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133 str))
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134
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135 (defun list-autoloads ()
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136 "List autoload files in (what will be) the normal lisp search path.
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137 This function is used during build to find where the global symbol files so
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138 they can be perused for their useful information."
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139 ;; Source directory may not be initialized yet.
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140 ;; (print (prin1-to-string load-path))
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141 (if (null source-directory)
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142 (setq source-directory (concat (car load-path) "/..")))
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143 (let ((files (directory-files source-directory t ".*"))
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144 file autolist)
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145 (while (setq file (car-safe files))
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146 (if (and (file-directory-p file)
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147 (file-exists-p (concat file "/" autoload-file-name)))
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148 (setq autolist (cons (concat file "/" autoload-file-name)
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149 autolist)))
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150 (setq files (cdr files)))
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151 autolist))
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152
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177
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153 ;; The following function is called from temacs
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154 (defun packages-find-packages-1 (package path-only)
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155 "Search the supplied directory for associated directories.
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156 The top level is assumed to look like:
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157 info/ Contain texinfo files for lisp installed in this hierarchy
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158 etc/ Contain data files for lisp installled in this hiearchy
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159 lisp/ Contain directories which either have straight lisp code
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160 or are self-contained packages of their own."
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161 ;; Info files
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162 (if (and (null path-only) (file-directory-p (concat package "/info")))
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163 (setq Info-default-directory-list
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164 (cons (concat package "/info/") Info-default-directory-list)))
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165 ;; Data files
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166 (if (and (null path-only) (file-directory-p (concat package "/etc")))
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167 (setq data-directory-list
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168 (cons (concat package "/etc/") data-directory-list)))
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169 ;; Lisp files
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170 (if (file-directory-p (concat package "/lisp"))
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171 (progn
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172 (setq load-path (cons (concat package "/lisp/") load-path))
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173 (let ((dirs (directory-files (concat package "/lisp/")
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174 t "^[^-.]" nil 'dirs-only))
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175 dir)
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176 (while dirs
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177 (setq dir (car dirs))
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178 (setq load-path (cons dir load-path))
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179 (packages-find-packages-1 dir path-only)
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180 (setq dirs (cdr dirs)))))))
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181
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182 ;; The following function is called from temacs
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183 (defun packages-find-packages (pkg-path path-only)
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184 "Search the supplied path for additional info/etc/lisp directories.
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185 Lisp directories if configured prior to build time will have equivalent
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186 status as bundled packages."
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187 (let ((path pkg-path)
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188 dir)
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189 (while path
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190 (setq dir (car path))
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191 (prin1 (concat "Find: " (expand-file-name dir) "\n"))
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192 (packages-find-packages-1 (expand-file-name dir) path-only)
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193 (setq path (cdr path)))))
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194
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195 ;; Data-directory is really a list now. Provide something to search it for
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196 ;; directories.
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197
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198 (defun locate-data-directory (name &optional data-dir-list)
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199 "Locate a directory in a search path."
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200 (unless data-dir-list
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201 (setq data-dir-list data-directory-list))
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202 (let (dir found found-dir (dirs data-dir-list))
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203 (while (and (null found-dir) dirs)
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204 (setq dir (car dirs))
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205 (setq found (concat dir name "/"))
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206 (setq found-dir (file-directory-p found))
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207 (setq dirs (cdr dirs)))
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208 found))
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209
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210 ;; If we are being loaded as part of being dumped, bootstrap the rest of the
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211 ;; load-path for loaddefs.
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212 (if (fboundp 'load-gc)
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213 (packages-find-packages package-path t))
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214
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163
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215 (provide 'packages)
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216
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217 ;;; packages.el ends here
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