Subject: bug#30624: 27.0.50; dired-create-destination-dirs doesn't work when renaming more than one file

From: Tino Calancha <[email-masked]>
Date: Sun, 1 Apr 2018 20:08:07 +0900 (JST)

On Mon, 19 Mar 2018, Eli Zaretskii wrote:

>> From: Amos Bird <[email-masked]>
>> Date: Tue, 27 Feb 2018 10:29:09 +0800
>>
>> I'm using emacs 27.0.50 and have dired-create-destination-dirs set
>> to 'always.
>> When renaming more than one files to a new directory, dired throws
>> an error at
>> /usr/local/share/emacs/27.0.50/lisp/dired-aux.el.gz:1891 . It
>> fails early before
>> it has time to check whether a new directory should be created.

Thank you very much for your report Amos!

I would be enough to call `dired-maybe-create-dirs' right before
binding `into-dir', as follows:

--8<-----------------------------cut here---------------start------------->8---
commit a89518cfb2f57509d3f0e31ddfe097f56e95c484
Author: Tino Calancha <[email-masked]>
Date:   Sun Apr 1 19:54:23 2018 +0900

     Honor dired-create-destination-dirs if copying/renaming >1 files

     Check `dired-create-destination-dirs' when the user wants to
     copy/rename several files.
     * lisp/dired-aux.el (dired-do-create-files):
     Call `dired-maybe-create-dirs' right before bind `into-dir' (Bug#30624).

diff --git a/lisp/dired-aux.el b/lisp/dired-aux.el
index e8b5e6755e..821b7d7975 100644
--- a/lisp/dired-aux.el
+++ b/lisp/dired-aux.el
@@ -1864,29 +1864,31 @@ dired-do-create-files
  		    (dired-mark-read-file-name
  		     (concat (if dired-one-file op1 operation) " %s to: ")
  		     target-dir op-symbol arg rfn-list default))))
-	 (into-dir (cond ((null how-to)
-			  ;; Allow users to change the letter case of
-			  ;; a directory on a case-insensitive
-			  ;; filesystem.  If we don't test these
-			  ;; conditions up front, file-directory-p
-			  ;; below will return t on a case-insensitive
-			  ;; filesystem, and Emacs will try to move
-			  ;; foo -> foo/foo, which fails.
-			  (if (and (file-name-case-insensitive-p (car fn-list))
-				   (eq op-symbol 'move)
-				   dired-one-file
-				   (string= (downcase
-					     (expand-file-name (car fn-list)))
-					    (downcase
-					     (expand-file-name target)))
-				   (not (string=
-					 (file-name-nondirectory (car fn-list))
-					 (file-name-nondirectory target))))
-			      nil
-			    (file-directory-p target)))
-			 ((eq how-to t) nil)
-			 (t (funcall how-to target)))))
+	 (into-dir
+          (progn
+            (unless dired-one-file (dired-maybe-create-dirs target))
+            (cond ((null how-to)
+		   ;; Allow users to change the letter case of
+		   ;; a directory on a case-insensitive
+		   ;; filesystem.  If we don't test these
+		   ;; conditions up front, file-directory-p
+		   ;; below will return t on a case-insensitive
+		   ;; filesystem, and Emacs will try to move
+		   ;; foo -> foo/foo, which fails.
+		   (if (and (file-name-case-insensitive-p (car fn-list))
+			    (eq op-symbol 'move)
+			    dired-one-file
+			    (string= (downcase
+				      (expand-file-name (car fn-list)))
+				     (downcase
+				      (expand-file-name target)))
+			    (not (string=
+				  (file-name-nondirectory (car fn-list))
+				  (file-name-nondirectory target))))
+		       nil
+		     (file-directory-p target)))
+		  ((eq how-to t) nil)
+		  (t (funcall how-to target))))))
      (if (and (consp into-dir) (functionp (car into-dir)))
  	(apply (car into-dir) operation rfn-list fn-list target (cdr into-dir))
        (if (not (or dired-one-file into-dir))
--8<-----------------------------cut here---------------end--------------->8---
In GNU Emacs 27.0.50 (build 10, x86_64-pc-linux-gnu, GTK+ Version 3.22.11)
  of 2018-03-30 built on calancha-pc
Repository revision: f759c5cfe4651af5f64fac2492fa362f8d383bd5