X-Git-Url: http://git.chise.org/gitweb/?a=blobdiff_plain;f=lisp%2Ffind-paths.el;h=fdd3cc2b5745c83de3926d46df4ec546476b02a2;hb=762383636a99307282c2d93d26c35c046ec24da1;hp=9118e94de3136eb4743dcc4d4b48c32f9500a6f8;hpb=e31bfd1501359ce20fe1caf6b913a019318ec83c;p=chise%2Fxemacs-chise.git-

diff --git a/lisp/find-paths.el b/lisp/find-paths.el
index 9118e94..fdd3cc2 100644
--- a/lisp/find-paths.el
+++ b/lisp/find-paths.el
@@ -109,6 +109,10 @@ from the search."
     (paths-file-readable-directory-p (paths-construct-path (list directory "lisp")))
     (paths-file-readable-directory-p (paths-construct-path (list directory "etc"))))))
 
+(defun paths-root-in-place-p (root)
+  "Check if ROOT is an in-place installation root for XEmacs."
+  (paths-file-readable-directory-p (paths-construct-path (list root "lisp"))))
+
 (defun paths-chase-symlink (file-name)
   "Chase a symlink until the bitter end."
       (let ((maybe-symlink (file-symlink-p file-name)))
@@ -159,7 +163,8 @@ to EXPAND-FILE-NAME."
      base))))
 
 (defun paths-find-emacs-directory (roots suffix base
-				   &optional envvar default keep-suffix)
+				   &optional envvar default keep-suffix
+				   	     in-place-external)
   "Find a directory in the XEmacs hierarchy.
 ROOTS must be a list of installation roots.
 SUFFIX is the subdirectory from there.
@@ -168,7 +173,9 @@ ENVVAR is the name of the environment variable that might also
 specify the directory.
 DEFAULT is the preferred value.
 If KEEP-SUFFIX is non-nil, the suffix must be respected in searching
-the directory."
+the directory.
+If IN-PLACE-EXTERNAL is non-nil, the directory might be found outside
+an in-place root-hierarchy."
   (let ((preferred-value (or (and envvar (getenv envvar))
 			     default)))
     (if (and preferred-value
@@ -176,28 +183,39 @@ the directory."
 	(file-name-as-directory preferred-value)
       (catch 'gotcha
 	(while roots
-	  (let* ((root (car roots))
-		 ;; installed
-		 (path (paths-construct-emacs-directory root suffix base)))
-	    (if (paths-file-readable-directory-p path)
-		(throw 'gotcha path)
-	      ;; in-place
-	      (if (null keep-suffix)
-		  (let ((path (paths-construct-emacs-directory root "" base)))
-		    (if (paths-file-readable-directory-p path)
-			(throw 'gotcha path))))))
+	  (let ((root (car roots)))
+	    ;; installed
+	    (let ((path (paths-construct-emacs-directory root suffix base)))
+	      (if (paths-file-readable-directory-p path)
+		  (throw 'gotcha path)))
+	    ;; in-place
+	    (if (null keep-suffix)
+		(let ((path (paths-construct-emacs-directory root "" base)))
+		  (if (paths-file-readable-directory-p path)
+		      (throw 'gotcha path))))
+	    (if (and in-place-external
+		     (paths-root-in-place-p root))
+		(let ((path (paths-construct-emacs-directory
+			     (paths-construct-path '("..") root)
+			     "" base)))
+		  (if (paths-file-readable-directory-p path)
+		      (throw 'gotcha path)))))
 	  (setq roots (cdr roots)))
 	nil))))
 
-(defun paths-find-site-directory (roots base &optional envvar default)
-  "Find a site-specific directory in the XEmacs hierarchy."
+(defun paths-find-site-directory (roots base &optional envvar default in-place-external)
+  "Find a site-specific directory in the XEmacs hierarchy.
+If IN-PLACE-EXTERNAL is non-nil, the directory might be found outside
+an in-place root-hierarchy."
   (paths-find-emacs-directory roots
 			      (file-name-as-directory
 			       (paths-construct-path (list
 						      "lib"
 						      emacs-program-name)))
 			      base
-			      envvar default))
+			      envvar default
+			      nil
+			      in-place-external))
 
 (defun paths-find-version-directory (roots base
 				     &optional envvar default enforce-version)