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1 ;;; setup-paths.el --- setup various XEmacs paths
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2
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3 ;; Copyright (C) 1985-1986, 1990, 1992-1997 Free Software Foundation, Inc.
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4 ;; Copyright (c) 1993, 1994 Sun Microsystems, Inc.
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5 ;; Copyright (C) 1995 Board of Trustees, University of Illinois
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6 ;; Copyright (C) 2003 Ben Wing.
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7
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8 ;; Author: Mike Sperber <mike@xemacs.orgx>
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428
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9 ;; Maintainer: XEmacs Development Team
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10 ;; Keywords: internal, dumped
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11
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12 ;; This file is part of XEmacs.
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13
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14 ;; XEmacs is free software; you can redistribute it and/or modify it
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15 ;; under the terms of the GNU General Public License as published by
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16 ;; the Free Software Foundation; either version 2, or (at your option)
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17 ;; any later version.
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18
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19 ;; XEmacs is distributed in the hope that it will be useful, but
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20 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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21 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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22 ;; General Public License for more details.
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23
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24 ;; You should have received a copy of the GNU General Public License
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25 ;; along with XEmacs; see the file COPYING. If not, write to the
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26 ;; Free Software Foundation, 59 Temple Place - Suite 330,
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27 ;; Boston, MA 02111-1307, USA.
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28
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29 ;;; Synched up with: Not in FSF.
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30
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31 ;;; Commentary:
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32
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33 ;; This file is dumped with XEmacs.
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34
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35 ;; This file contains functions and variables that describe and construct
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36 ;; the various paths into the XEmacs hierarchy from a global viewpoint.
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37
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38 ;; This file doesn't actually set any global variable, and doesn't
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39 ;; contain any state---it just contains the functionality for
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40 ;; searching directories and constructing paths.
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41
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42 ;; It requires find-paths.el and packages.el.
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43
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44 ;;; Code:
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45
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46 ;(setq debug-paths t)
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47
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48
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49 (defvar paths-core-load-path-depth 0
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50 "Depth of load-path searches in core Lisp paths.")
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51
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52 (defvar paths-site-load-path-depth 1
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53 "Depth of load-path searches in site Lisp paths.")
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54
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55 (defvar paths-mule-load-path-depth 0
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56 "Depth of load-path searches in Mule Lisp paths.")
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57
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58 (defvar paths-module-load-path-depth 1
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59 "Depth of load-path searches in module paths.")
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60
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61 (defvar paths-default-info-directories
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62 (mapcar (function
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63 (lambda (dirlist)
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64 (paths-construct-path
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65 dirlist (char-to-string directory-sep-char))))
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66 '(("usr" "local" "info")
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67 ("usr" "info")
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68 ("usr" "local" "share" "info")
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69 ("usr" "share" "info")))
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70 "Directories appended to the end of the info path by default.")
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71
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72
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73 ;;; Basic utility functions.
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74
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75 (defun paths-emacs-root-p (directory)
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76 "Check if DIRECTORY is a plausible installation root."
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77 (or
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78 ;; installed
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79 (paths-file-readable-directory-p (paths-construct-path (list directory
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80 "lib"
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81 (construct-emacs-version-name))))
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82 ;; in-place or windows-nt. windows-nt equivalent of --srcdir is
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83 ;; BUILD_DIR in config.inc, and has no lisp/ or etc/ since symlinks
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84 ;; don't exist. instead, xemacs.mak points configure-lisp-directory and
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85 ;; configure-data-directory at the right places.
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86 (and
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87 (or configure-exec-directory (paths-file-readable-directory-p (paths-construct-path (list directory "lib-src"))) (eq system-type 'windows-nt))
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88 (or configure-lisp-directory (paths-file-readable-directory-p (paths-construct-path (list directory "lisp"))))
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89 (or configure-data-directory (paths-file-readable-directory-p (paths-construct-path (list directory "etc")))))))
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90
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91 (defun paths-emacs-data-root-p (directory)
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92 "Check if DIRECTORY is a plausible data installation root.
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93 A data installation root is one containing data files that may be shared
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94 among multiple different versions of XEmacs, the packages in particular.
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95 This serves as an additional filter to narrow down the list of plausible
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96 installation roots."
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97 (or
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98 ;; installed
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99 (paths-file-readable-directory-p (paths-construct-path (list directory
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100 "share"
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101 emacs-program-name)))
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102 (paths-file-readable-directory-p (paths-construct-path (list directory
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103 "share"
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104 (construct-emacs-version-name))))
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105 ;; in-place or windows-nt
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106 (and
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107 (paths-file-readable-directory-p (paths-construct-path (list directory "lisp")))
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108 (paths-file-readable-directory-p (paths-construct-path (list directory "etc"))))
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109
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110 ;; searching for a package directory
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111 (and
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112 (string-match "win32" system-configuration)
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113 (paths-file-readable-directory-p (paths-construct-path (list directory
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114 "xemacs-packages"))))))
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115
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116 (defun paths-find-invocation-roots (invocation-directory invocation-name root-p)
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117 "Find the list of run-time roots of XEmacs.
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118 INVOCATION-DIRECTORY is a directory containing the XEmacs executable.
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119 INVOCATION-NAME is the name of the executable itself
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120 ROOT-P is a function that tests whether a root is plausible."
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121 (let* ((executable-file-name (paths-chase-symlink
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122 (concat invocation-directory
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123 invocation-name)))
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124 (executable-directory (file-name-directory executable-file-name))
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125 (maybe-root-1 (file-name-as-directory
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126 (paths-construct-path '("..") executable-directory)))
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127 (maybe-root-2 (file-name-as-directory
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128 (paths-construct-path '(".." "..") executable-directory))))
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129
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130 (paths-filter root-p
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131 (list maybe-root-1 maybe-root-2))))
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132
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133 (defun paths-find-emacs-roots (invocation-directory
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134 invocation-name
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135 root-p)
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136 "Find all plausible installation roots for XEmacs.
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137 This is a list of plausible directories in which to search for the important
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138 directories used by XEmacs at run-time, for example `exec-directory',
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139 `data-directory' and `lisp-directory'.
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140 ROOT-P is a function that tests whether a root is plausible."
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141 (let* ((invocation-roots
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142 (paths-find-invocation-roots invocation-directory
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143 invocation-name
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144 root-p))
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145 (potential-installation-roots
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146 (paths-uniq-append
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147 (and configure-exec-prefix-directory
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148 (list (file-name-as-directory
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149 configure-exec-prefix-directory)))
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150 (and configure-prefix-directory
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151 (list (file-name-as-directory
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152 configure-prefix-directory)))))
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153 (installation-roots
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154 (paths-filter root-p potential-installation-roots)))
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155 (paths-uniq-append invocation-roots
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156 installation-roots)))
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157
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158 (defun paths-find-site-lisp-directory (roots)
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159 "Find the site Lisp directory of the XEmacs hierarchy.
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160 ROOTS is a list of installation roots."
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161 (paths-find-site-directory roots (list "site-lisp")
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162 nil nil
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163 configure-site-directory))
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164
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165 (defun paths-find-site-module-directory (roots)
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166 "Find the site modules directory of the XEmacs hierarchy.
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167 ROOTS is a list of installation roots."
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168 (paths-find-site-directory roots (list "site-modules")
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169 t nil
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170 configure-site-module-directory))
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171
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172 (defun paths-find-lisp-directory (roots)
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173 "Find the main Lisp directory of the XEmacs hierarchy.
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174 ROOTS is a list of installation roots."
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175 (paths-find-version-directory roots (list "lisp")
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176 nil nil
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177 configure-lisp-directory))
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178
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179 (defun paths-find-mule-lisp-directory (roots &optional lisp-directory)
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180 "Find the Mule Lisp directory of the XEmacs hierarchy.
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181 ROOTS is a list of installation roots."
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182 ;; #### kludge
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183 (if lisp-directory
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184 (let ((guess
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185 (file-name-as-directory
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186 (paths-construct-path (list lisp-directory "mule")))))
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187 (if (paths-file-readable-directory-p guess)
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188 guess
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189 (paths-find-version-directory roots (list "mule-lisp")
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190 nil nil
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191 configure-mule-lisp-directory)))))
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192
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193 (defun paths-find-module-directory (roots)
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194 "Find the main modules directory of the XEmacs hierarchy.
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195 ROOTS is a list of installation roots."
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196 (paths-find-architecture-directory roots (list "modules")
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197 nil configure-module-directory))
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198
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199 (defun paths-construct-load-path
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200 (roots early-package-load-path late-package-load-path last-package-load-path
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201 lisp-directory
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202 &optional site-lisp-directory mule-lisp-directory)
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203 "Construct the complete load path.
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204 ROOTS is the list of installation roots.
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205 EARLY-PACKAGE-LOAD-PATH, LATE-PACKAGE-LOAD-PATH, and LAST-PACKAGE-LOAD-PATH
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206 are the load paths for the package hierarchies.
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207 SITE-LISP-DIRECTORY and MULE-LISP-DIRECTORY are optional directories to be
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208 included in the load path---SITE-LISP-DIRECTORY for the obsolete site-specific
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209 Lisp files, and MULE-LISP-DIRECTORY for the Mule Lisp files, which exist
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210 only in Mule installations."
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211 (let* ((envvar-value (getenv "EMACSLOADPATH"))
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212 (env-load-path
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213 (and envvar-value
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214 (paths-decode-directory-path envvar-value 'drop-empties)))
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215 (site-lisp-load-path
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216 (and site-lisp-directory
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217 (paths-find-recursive-load-path (list site-lisp-directory)
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218 paths-site-load-path-depth)))
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219 (mule-lisp-load-path
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220 (and mule-lisp-directory
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221 (paths-find-recursive-load-path (list mule-lisp-directory)
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222 paths-mule-load-path-depth)))
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223 (lisp-load-path
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224 (and lisp-directory
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225 (paths-find-recursive-load-path (list lisp-directory)
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226 paths-core-load-path-depth))))
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227 (append env-load-path
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228 early-package-load-path
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229 site-lisp-load-path
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230 late-package-load-path
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231 mule-lisp-load-path
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232 lisp-load-path
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233 last-package-load-path)))
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234
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235 (defun paths-construct-module-load-path
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236 (root module-directory &optional site-module-directory)
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237 "Construct the modules load path."
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238 (let* ((envvar-value (getenv "EMACSMODULEPATH"))
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239 (env-module-path
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240 (and envvar-value
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241 (paths-decode-directory-path envvar-value 'drop-empties)))
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242 (site-module-load-path
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243 (and site-module-directory
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244 (paths-find-recursive-load-path (list site-module-directory)
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245 paths-site-load-path-depth)))
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246 (module-load-path
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247 (and module-directory
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248 (paths-find-recursive-load-path (list module-directory)
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249 paths-module-load-path-depth))))
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250 (append env-module-path
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251 site-module-load-path
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252 module-load-path)))
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253
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254 (defun paths-construct-info-path (roots
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255 early-package-hierarchies
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256 late-package-hierarchies
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257 last-package-hierarchies)
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258 "Construct the info path.
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259 ROOTS is the list of installation roots.
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260 EARLY-PACKAGE-HIERARCHIES, LATE-PACKAGE-HIERARCHIES, and
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261 LAST-PACKAGE-HIERARCHIES are lists of package hierarchy roots,
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262 respectively."
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263 (let ((info-path-envval (getenv "INFOPATH")))
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264 (paths-uniq-append
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265 (append
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266 (let ((info-directory
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267 (paths-find-version-directory roots (list "info")
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268 nil nil
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269 configure-info-directory)))
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270 (and info-directory
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271 (list info-directory)))
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272 (packages-find-package-info-path early-package-hierarchies)
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273 (packages-find-package-info-path late-package-hierarchies)
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274 (packages-find-package-info-path last-package-hierarchies)
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428
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275 (and info-path-envval
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276 (paths-decode-directory-path info-path-envval 'drop-empties)))
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277 (and (null info-path-envval)
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278 (paths-uniq-append
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279 (paths-directories-which-exist configure-info-path)
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280 (paths-directories-which-exist paths-default-info-directories))))))
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281
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282 (defun paths-find-doc-directory (roots)
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283 "Find the documentation directory.
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284 ROOTS is the list of installation roots."
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285 (paths-find-architecture-directory roots (list "lib-src") nil configure-doc-directory))
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286
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287 (defun paths-find-exec-directory (roots)
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288 "Find the binary directory.
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289 ROOTS is the list of installation roots."
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290 (paths-find-architecture-directory roots (list "lib-src")
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291 nil configure-exec-directory))
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292
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293 (defun paths-construct-exec-path (roots exec-directory
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294 early-package-hierarchies
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295 late-package-hierarchies
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296 last-package-hierarchies)
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297 "Find the binary path.
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298 ROOTS is the list of installation roots.
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299 EARLY-PACKAGE-HIERARCHIES, LATE-PACKAGE-HIERARCHIES, and
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300 LAST-PACKAGE-HIERARCHIES are lists of package hierarchy roots,
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301 respectively.
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302 EXEC-DIRECTORY is the directory of architecture-dependent files that
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303 come with XEmacs.
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304 EARLY-PACKAGES, LATE-PACKAGES, and LAST-PACKAGES are lists of
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305 package hierarchy roots, respectively."
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428
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306 (append
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307 (let ((path-envval (getenv "PATH")))
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308 (if path-envval
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309 (paths-decode-directory-path path-envval 'drop-empties)))
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310 (packages-find-package-exec-path early-package-hierarchies)
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311 (packages-find-package-exec-path late-package-hierarchies)
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428
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312 (let ((emacspath-envval (getenv "EMACSPATH")))
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313 (and emacspath-envval
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314 (split-path emacspath-envval)))
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315 (and exec-directory
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316 (list exec-directory))
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317 (packages-find-package-exec-path last-package-hierarchies)))
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318
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319 (defun paths-find-data-directory (roots)
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320 "Find the data directory.
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321 ROOTS is the list of installation roots."
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322 (paths-find-version-directory roots (list "etc") nil "EMACSDATA" configure-data-directory))
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323
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324 (defun paths-construct-data-directory-list (data-directory
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325 early-package-hierarchies
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326 late-package-hierarchies
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327 last-package-hierarchies)
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328 "Construct the data path.
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329 DATA-DIRECTORY is the data directory of the XEmacs installation.
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330 EARLY-PACKAGE-HIERARCHIES, LATE-PACKAGE-HIERARCHIES, and
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331 LAST-PACKAGE-HIERARCHIES are lists of package hierarchy roots,
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332 respectively."
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428
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333 (append
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334 (packages-find-package-data-path early-package-hierarchies)
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335 (packages-find-package-data-path late-package-hierarchies)
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428
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336 (list data-directory)
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337 (packages-find-package-data-path last-package-hierarchies)))
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338
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339 ;;; setup-paths.el ends here
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