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bug#67953: 30.0.50; ls-lisp messes up columns
From: |
Eli Zaretskii |
Subject: |
bug#67953: 30.0.50; ls-lisp messes up columns |
Date: |
Fri, 22 Dec 2023 11:01:18 +0200 |
> Date: Thu, 21 Dec 2023 09:35:55 -0500
> From: Stefan Monnier via "Bug reports for GNU Emacs,
> the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
>
> Package: Emacs
> Version: 30.0.50
>
>
> After loading `ls-lisp`, I notice that with (setq
> ls-lisp-use-insert-directory-program t) I get the nice:
>
> C-x d /u*/s* RET ==>
>
> /:
> wildcard u*/s*/
> drwxr-xr-x 2 root root 20480 10 déc 11:24 usr/sbin/
> drwxr-xr-x 404 root root 16384 2 déc 15:05 usr/share/
> drwxr-xr-x 4 root root 4096 22 fév 2023 usr/src/
>
> But with (setq ls-lisp-use-insert-directory-program nil) I get:
>
> C-x d /u*/s* RET ==>
>
> /:
> wildcard u*/s*
> drwxr-xr-x 2 root root 20480 12-10 11:24 usr/sbin
> drwxr-xr-x404 root root 16384 12-02 15:05 usr/share
> drwxr-xr-x 4 root root 4096 2023-02-22 usr/src
>
> Notice the weird extra space in front of the last line and the missing
> space between "x" and "404" in the penultimate line.
It's a bug in dired-align-file (it sounds like it was never tested
with a version of 'ls' that doesn't support the --dired switch). Its
algorithm breaks down if the entry of a file does not start with
spaces. --dired guarantees that, but ls-lisp doesn't, and I wonder
what other versions of 'ls' do.
The simple kludge below, which simply prevents it from realigning the
first column of data, seems to fix it here. WDYT?
diff --git a/lisp/dired.el b/lisp/dired.el
index cc548ba..3838368 100644
--- a/lisp/dired.el
+++ b/lisp/dired.el
@@ -1572,14 +1572,16 @@ dired-align-file
;; the beginning or the end of the next field, depending on
;; whether this field is left or right aligned).
(align-pt-offset
- (save-excursion
- (goto-char other)
- (move-to-column curcol)
- (when (looking-at
- (concat
- (if (eq (char-before) ?\s) " *" "[^ ]* *")
- (if num-align "[0-9][^ ]*")))
- (- (match-end 0) (match-beginning 0)))))
+ (if (zerop curcol)
+ 0
+ (save-excursion
+ (goto-char other)
+ (move-to-column curcol)
+ (when (looking-at
+ (concat
+ (if (eq (char-before) ?\s) " *" "[^ ]* *")
+ (if num-align "[0-9][^ ]*")))
+ (- (match-end 0) (match-beginning 0))))))
;; Now, the number of spaces to insert is align-pt-offset
;; minus the distance to the equivalent point on the
;; current line.