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bug#24474: dired-diff doesn't know about backup-directory-alist
From: |
積丹尼 Dan Jacobson |
Subject: |
bug#24474: dired-diff doesn't know about backup-directory-alist |
Date: |
Mon, 19 Sep 2016 23:40:37 +0800 |
= runs the command dired-diff, which is an interactive autoloaded
compiled Lisp function in `dired-aux.el'.
It is bound to =, <menu-bar> <immediate> <diff>.
(dired-diff FILE &optional SWITCHES)
Compare file at point with file FILE using `diff'.
If called interactively, prompt for FILE. If the file at point
has a backup file, use that as the default. If the file at point
is a backup file, use its original...
[OK, let's try it. Oops:]
diff -U0 /home/jidanni/\!home\!jidanni\!.bash_profile.\~42\~
/home/jidanni/.bash_profile
diff: /home/jidanni/!home!jidanni!.bash_profile.~42~: No such file or directory
Diff finished (diff error). Mon Sep 19 23:25:22 2016
[Which is because the correct file name is:]
/home/jidanni/.backups/!home!jidanni!.bash_profile.~42~
[because of my:]
backup-directory-alist is a variable defined in `files.el'.
Its value is ((".*" . "~/.backups/"))
Original value was nil
[So we see that dired-diff got the filename right, but the directory
wrong.
Furthermore, "if the file at point is a backup file..." also fails
miserably. Go to your ~/.backups directory and try it on a few files...]
diff -U0 /home/jidanni/.backups/\!home\!jidanni\!.bash_profile.\~42\~
/home/jidanni/.backups/\!home\!jidanni\!.bash_profile
diff: /home/jidanni/.backups/!home!jidanni!.bash_profile: No such file or
directory
Diff finished (diff error). Mon Sep 19 23:37:10 2016
[We see it assumes everything is in the same directory.
It should have tried comparing ~/.bash_profile .
emacs-version "24.5.1".]
- bug#24474: dired-diff doesn't know about backup-directory-alist,
積丹尼 Dan Jacobson <=