Stop files with same basename messing up finder's package--builtins

* lisp/Makefile.in (setwins_finder): New, excluding leim.
(finder-data): Use setwins_finder.

* lisp/finder.el (finder-no-scan-regexp): Add leim-list.
(finder-compile-keywords): Don't skip files with same basename.

Fixes: debbugs:14010

lisp/ChangeLog

 2014-03-14  Glenn Morris  <rgm@gnu.org>
+	* finder.el (finder-no-scan-regexp): Add leim-list.
+	(finder-compile-keywords):
+	Don't skip files with same basename.  (Bug#14010)
+	* Makefile.in (setwins_finder): New, excluding leim.
+	(finder-data): Use setwins_finder.
+
 	* help-fns.el (help-split-fundoc, help-add-fundoc-usage)
 	(help-function-arglist, help-make-usage): Move from here...
 	* help.el (help-split-fundoc, help-add-fundoc-usage)

lisp/Makefile.in

@@ -124,6 +124,15 @@ setwins_almost=for file in `find ${srcdir} -type d -print`; do \
 	   esac; \
         done
 
+# Find all subdirectories except `obsolete', `term', and `leim' (and subdirs).
+# We don't want the leim files listed as packages, especially
+# since many share basenames with files in language/.
+setwins_finder=for file in `find ${srcdir} -type d -print`; do \
+	   case $$file in ${srcdir}*/obsolete | ${srcdir}*/term | ${srcdir}*/leim* ) ;; \
+	     *) wins="$$wins$${wins:+ }$$file" ;; \
+	   esac; \
+        done
+
 # Find all subdirectories in which we might want to create subdirs.el.
 setwins_for_subdirs=for file in `find ${srcdir} -type d -print`; do \
 	   case $$file in \
@@ -166,7 +175,7 @@ custom-deps: doit
 $(lisp)/finder-inf.el:
 	$(MAKE) $(MFLAGS) finder-data
 finder-data: doit
-	$(setwins_almost); \
+	$(setwins_finder); \
 	echo Directories: $$wins; \
 	$(emacs) -l finder \
 	  --eval '(setq generated-finder-keywords-file (unmsys--file-name "$(srcdir)/finder-inf.el"))' \

lisp/finder.el

@@ -135,7 +135,7 @@ Keywords and package names both should be symbols.")
 ;; http://lists.gnu.org/archive/html/emacs-pretest-bug/2007-01/msg00469.html
 ;; ldefs-boot is not auto-generated, but has nothing useful.
 (defvar finder-no-scan-regexp "\\(^\\.#\\|\\(loaddefs\\|ldefs-boot\\|\
-cus-load\\|finder-inf\\|esh-groups\\|subdirs\\)\\.el$\\)"
+cus-load\\|finder-inf\\|esh-groups\\|subdirs\\|leim-list\\)\\.el$\\)"
   "Regexp matching file names not to scan for keywords.")
 
 (autoload 'autoload-rubric "autoload")
@@ -194,7 +194,16 @@ from; the default is `load-path'."
 				  (and (string-match el-file-regexp f)
 				       (intern (match-string 1 f)))))
 		      (memq base-name processed))
-	    (push base-name processed)
+;; There are multiple files in the tree with the same basename.
+;; So skipping files based on basename means you randomly (depending
+;; on which order the files are traversed in) miss some packages.
+;; http://debbugs.gnu.org/14010
+;; You might think this could lead to two files providing the same package,
+;; but it does not, because the duplicates are (at time of writing)
+;; all due to files in cedet, which end up with package-override set.
+;; FIXME this is obviously fragile.
+;; Make the (eq base-name package) case below issue a warning?
+;;	    (push base-name processed)
 	    (with-temp-buffer
 	      (insert-file-contents (expand-file-name f d))
 	      (setq summary  (lm-synopsis)