## Copyright (C) 2005-2015 Søren Hauberg
## Copyright (C) 2010 VZLU Prague, a.s.
##
## 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} {} prepare_installation (@var{desc}, @var{packdir})
## Undocumented internal function.
## @end deftypefn

function prepare_installation (desc, packdir)
  ## Is there a pre_install to call?
  if (exist (fullfile (packdir, "pre_install.m"), "file"))
    wd = pwd ();
    try
      cd (packdir);
      pre_install (desc);
      cd (wd);
    catch
      cd (wd);
      rethrow (lasterror ());
    end_try_catch
  endif

  ## If the directory "inst" doesn't exist, we create it.
  inst_dir = fullfile (packdir, "inst");
  if (! exist (inst_dir, "dir"))
    [status, msg] = mkdir (inst_dir);
    if (status != 1)
      rmdir (desc.dir, "s");
      error ("the 'inst' directory did not exist and could not be created: %s",
             msg);
    endif
  endif
endfunction