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* bug#33450: 26.1.90; NEWS entry for dired 'Z' is inaccurate
@ 2018-11-21  3:39 Mike Kupfer
  2018-11-21  9:23 ` Eli Zaretskii
  2018-11-21 18:23 ` Glenn Morris
  0 siblings, 2 replies; 14+ messages in thread
From: Mike Kupfer @ 2018-11-21  3:39 UTC (permalink / raw)
  To: 33450

The 26.1.90 NEWS file has this (new) entry for Dired:

  *** The 'Z' command on a directory name compresses all of its files.
  It produces a compressed '.tar.gz' archive with all the files in the
  directory and all of its subdirectories.  For symmetry, 'Z' on a
  '.tar.gz' or a '.tgz' archive extracts all the archived files into a
  directory whose name is the archive name sans the '.tar.gz' or '.tgz'
  extension.  (This change was actually made in Emacs 26.1, but was not
  called out in its NEWS.)

The description of the unpacking case implies that the user will see the
described behavior for any .tar.gz or .tgz file.  In reality, 'Z' simply
unpacks the archive.  The described behavior only happens if the archive
is structured in a canonical way, e.g., if 'Z' was used to create the
.tar.gz file.

The wording should be changed, so as not to mislead the user about what
'Z' does.  A user who misunderstands what 'Z' does could lose data due
to unanticipated overwrite when the archive is unpacked.  (Note that the
docstring for dired-do-compress says nothing about creating or unpacking
archive files.)

Also, and less important, I got the impression from the discussion on
emacs-devel that this feature was partially introduced in Emacs 25.
Wasn't the change in 26.1 just to make .tar.gz and .tgz behave the same?
I'm not sure it's worth trying to be that precise in the NEWS entry, but
I thought I'd mention it.

regards,
mike

In GNU Emacs 26.1.90 (build 1, x86_64-pc-linux-gnu, X toolkit, Xaw scroll bars)
 of 2018-11-19 built on alto
Windowing system distributor 'The X.Org Foundation', version 11.0.11902000
System Description:	Debian GNU/Linux 9.6 (stretch)

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^ permalink raw reply	[flat|nested] 14+ messages in thread

end of thread, other threads:[~2018-11-24  0:10 UTC | newest]

Thread overview: 14+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2018-11-21  3:39 bug#33450: 26.1.90; NEWS entry for dired 'Z' is inaccurate Mike Kupfer
2018-11-21  9:23 ` Eli Zaretskii
2018-11-21 14:50   ` Mike Kupfer
2018-11-21 15:13     ` Eli Zaretskii
2018-11-21 15:21       ` Mike Kupfer
2018-11-21 15:39         ` Eli Zaretskii
2018-11-21 18:23 ` Glenn Morris
2018-11-21 20:24   ` Glenn Morris
2018-11-21 22:31     ` Eli Zaretskii
2018-11-22 18:18       ` Glenn Morris
2018-11-22 19:05         ` Eli Zaretskii
2018-11-22 23:17     ` Richard Stallman
2018-11-23  8:37       ` Eli Zaretskii
2018-11-24  0:10         ` Richard Stallman

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