Dired: Handle posix wildcards in directory part

Allow Dired to handle calls like
\(dired \"~/foo/*/*.el\"), that is, with wildcards within
the directory part of the file argument (Bug#27631).
* lisp/files.el (insert-directory-wildcard-in-dir-p): New predicate.
(insert-directory-clean): New defun extracted from insert-directory.
(insert-directory)
* lisp/dired.el (dired-internal-noselect)
(dired-insert-directory): Use the new predicate; when it's true,
handle the directory wildcards with a shell call.
* lisp/eshell/em-ls.el (eshell-ls-use-in-dired): Add/remove both advices.
(eshell-ls-unload-hook): New defun.  Use it in
eshell-ls-unload-hook instead of an anonymous function.
(eshell-ls--dired)
* lisp/ls-lisp.el (ls-lisp--dired):
Advice dired to handle wildcards in the directory part with both
eshell-ls and ls-lisp.
* etc/NEWS: Announce it.
* doc/emacs/dired.texi (Dired Enter): Update manual.
* test/lisp/dired-tests.el (dired-test-bug27631): Add test.

1 files changed, 30 insertions, 0 deletions

diff --git a/lisp/ls-lisp.el b/lisp/ls-lisp.el
index 730ba26c6c8..56780daa09f 100644
--- a/lisp/ls-lisp.el
+++ b/lisp/ls-lisp.el
@@ -60,6 +60,9 @@
 
 ;;; Code:
 
+
+(require 'em-glob)
+
 (defgroup ls-lisp nil
   "Emulate the ls program completely in Emacs Lisp."
   :version "21.1"
@@ -477,6 +480,32 @@ not contain `d', so that a full listing is expected."
 	(message "%s: doesn't exist or is inaccessible" file)
 	(ding) (sit-for 2)))))		; to show user the message!
 
+
+(defun ls-lisp--dired (orig-fun dir-or-list &optional switches)
+  (interactive (dired-read-dir-and-switches ""))
+  (if (consp dir-or-list)
+      (funcall orig-fun dir-or-list switches)
+    (let ((dir-wildcard (insert-directory-wildcard-in-dir-p
+                         (expand-file-name dir-or-list))))
+      (if (not dir-wildcard)
+          (funcall orig-fun dir-or-list switches)
+        (let* ((default-directory (car dir-wildcard))
+               (files (eshell-extended-glob (cdr dir-wildcard)))
+               (dir (car dir-wildcard)))
+          (if files
+              (let ((inhibit-read-only t)
+                    (buf
+                     (apply orig-fun (nconc (list dir) files) (and switches (list switches)))))
+                (with-current-buffer buf
+                  (save-excursion
+                    (goto-char (point-min))
+                    (dired-goto-next-file)
+                    (forward-line 0)
+                    (insert "  wildcard " (cdr dir-wildcard) "\n"))))
+            (user-error "No files matching regexp")))))))
+
+(advice-add 'dired :around #'ls-lisp--dired)
+
 (defun ls-lisp-sanitize (file-alist)
   "Sanitize the elements in FILE-ALIST.
 Fixes any elements in the alist for directory entries whose file
@@ -869,6 +898,7 @@ All ls time options, namely c, t and u, are handled."
 (defun ls-lisp-unload-function ()
   "Unload ls-lisp library."
   (advice-remove 'insert-directory #'ls-lisp--insert-directory)
+  (advice-remove 'dired #'ls-lisp--dired)
   ;; Continue standard unloading.
   nil)