[Octave-bug-tracker] [bug #43431] gzip does not compress directories

[Rik]

URL:
  <http://savannah.gnu.org/bugs/?43431>

                 Summary: gzip does not compress directories
                 Project: GNU Octave
            Submitted by: rik5
            Submitted on: Fri 17 Oct 2014 10:42:28 AM PDT
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: GNU/Linux

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Details:

Apparently this hasn't worked correctly for a very long time.  I went
backwards through versions to 3.2.4 and haven't found this to ever work.

The problem is in scripts/miscellaneous/private/__xzip__.m.  I've added a note
in the code:


## FIXME: This does not work when you try to compress directories
##        The resulting name is dir/.gz which is totally wrong.
movefile (cellfun (@(x) sprintf ("%s.%s", x, extension),
                   fnames, "uniformoutput", false), cwd);


The issue is the algorithm which moves files and directories to a temporary
directory, compresses them in-place in the temp directory, and then moves them
to the output directory.  This is pretty inefficient as an algorithm, but that
is a separate issue.

The problem is that files which are compressed from say "junk" to "junk.gz"
are correctly moved.  But the code attempts to create the same name for
directories as for files--so "junkdir/" becomes "junkdir/.gz".





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