## Copyright (C) 2006-2012 Sylvain Pelissier
##
## This file is part of Octave.
##
## Octave is free software; you can redistribute it and/or modify it
## under the terms of the GNU General Public License as published by
## the Free Software Foundation; either version 3 of the License, or (at
## your option) any later version.
##
## Octave is distributed in the hope that it will be useful, but
## WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
## General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with Octave; see the file COPYING.  If not, see
## <http://www.gnu.org/licenses/>.

## -*- texinfo -*-
## @deftypefn  {Function File} {@var{entries} =} zip (@var{zipfile}, @var{files})
## @deftypefnx {Function File} {@var{entries} =} zip (@var{zipfile}, @var{files}, @var{rootdir})
## Compress the list of files and/or directories specified in @var{files}
## into the archive @var{zipfile} in the same directory.  If @var{rootdir}
## is defined the @var{files} are located relative to @var{rootdir} rather
## than the current directory.
## @seealso{unzip, bzip2, gzip, tar}
## @end deftypefn

## Author: Sylvain Pelissier <sylvain.pelissier@gmail.com>

function entries = zip (zipfile, files, rootdir = ".")

  if (nargin != 2 && nargin != 3)
    print_usage ();
  endif

  rootdir = tilde_expand (rootdir);

  if (ischar (files))
    files = cellstr (files);
  endif

  if (! ischar (zipfile) && ! iscellstr (files))
    error ("zip: expecting all arguments to be character strings");
  endif

  cmd = sprintf ("cd %s; zip -r %s/%s %s", rootdir, pwd (), zipfile,
                 sprintf (" %s", files{:}));

  [status, output] = system (cmd);

  if (status)
    error ("zip: zip failed with exit status = %d", status);
  endif

  if (nargout > 0)
    cmd = sprintf ("unzip -Z -1 %s", zipfile);
    [status, entries] = system (cmd);
    if (status)
      error ("zip: zipinfo failed with exit status = %d", status);
    endif
    if (entries(end) == "\n")
      entries(end) = [];
    endif
    entries = strsplit (entries, "\n", false);
  endif

endfunction