new file mode 100644
--- /dev/null
+++ b/scripts/pkg/private/uninstall.m
@@ -0,0 +1,148 @@
+## Copyright (C) 2005-2012 S�ren 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} {} uninstall (@var{pkgnames}, @var{handle_deps}, 
+## @var{verbose}, @var{local_list}, @var{global_list}, @var{global_install})
+## Undocumented internal function.
+## @end deftypefn
+
+function uninstall (pkgnames, handle_deps, verbose, local_list,
+                    global_list, global_install)
+  ## Get the list of installed packages.
+  [local_packages, global_packages] = installed_packages(local_list,
+                                                         global_list);
+  if (global_install)
+    installed_pkgs_lst = {local_packages{:}, global_packages{:}};
+  else
+    installed_pkgs_lst = local_packages;
+  endif
+
+  num_packages = length (installed_pkgs_lst);
+  delete_idx = [];
+  for i = 1:num_packages
+    cur_name = installed_pkgs_lst{i}.name;
+    if (any (strcmp (cur_name, pkgnames)))
+      delete_idx(end+1) = i;
+    endif
+  endfor
+
+  ## Are all the packages that should be uninstalled already installed?
+  if (length (delete_idx) != length (pkgnames))
+    if (global_install)
+      ## Try again for a locally installed package.
+      installed_pkgs_lst = local_packages;
+
+      num_packages = length (installed_pkgs_lst);
+      delete_idx = [];
+      for i = 1:num_packages
+        cur_name = installed_pkgs_lst{i}.name;
+        if (any (strcmp (cur_name, pkgnames)))
+          delete_idx(end+1) = i;
+        endif
+      endfor
+      if (length (delete_idx) != length (pkgnames))
+        ## FIXME: We should have a better error message.
+        warning ("some of the packages you want to uninstall are not installed");
+      endif
+    else
+      ## FIXME: We should have a better error message.
+      warning ("some of the packages you want to uninstall are not installed");
+    endif
+  endif
+
+  ## Compute the packages that will remain installed.
+  idx = setdiff (1:num_packages, delete_idx);
+  remaining_packages = {installed_pkgs_lst{idx}};
+
+  ## Check dependencies.
+  if (handle_deps)
+    error_text = "";
+    for i = 1:length (remaining_packages)
+      desc = remaining_packages{i};
+      bad_deps = get_unsatisfied_deps (desc, remaining_packages);
+
+      ## Will the uninstallation break any dependencies?
+      if (! isempty (bad_deps))
+        for i = 1:length (bad_deps)
+          dep = bad_deps{i};
+          error_text = cstrcat (error_text, " ", desc.name, " needs ",
+                               dep.package, " ", dep.operator, " ",
+                               dep.version, "\n");
+        endfor
+      endif
+    endfor
+
+    if (! isempty (error_text))
+      error ("the following dependencies where unsatisfied:\n  %s", error_text);
+    endif
+  endif
+
+  ## Delete the directories containing the packages.
+  for i = delete_idx
+    desc = installed_pkgs_lst{i};
+    ## If an 'on_uninstall.m' exist, call it!
+    if (exist (fullfile (desc.dir, "packinfo", "on_uninstall.m"), "file"))
+      wd = pwd ();
+      cd (fullfile (desc.dir, "packinfo"));
+      on_uninstall (desc);
+      cd (wd);
+    endif
+    ## Do the actual deletion.
+    if (desc.loaded)
+      rmpath (desc.dir);
+      if (exist (getarchdir (desc)))
+        rmpath (getarchdir (desc));
+      endif
+    endif
+    if (exist (desc.dir, "dir"))
+      [status, msg] = rm_rf (desc.dir);
+      if (status != 1)
+        error ("couldn't delete directory %s: %s", desc.dir, msg);
+      endif
+      [status, msg] = rm_rf (getarchdir (desc));
+      if (status != 1)
+        error ("couldn't delete directory %s: %s", getarchdir (desc), msg);
+      endif
+      if (dirempty (desc.archprefix))
+        rm_rf (desc.archprefix);
+      endif
+    else
+      warning ("directory %s previously lost", desc.dir);
+    endif
+  endfor
+
+  ## Write a new ~/.octave_packages.
+  if (global_install)
+    if (length (remaining_packages) == 0)
+      unlink (global_list);
+    else
+      global_packages = save_order (remaining_packages);
+      save (global_list, "global_packages");
+    endif
+  else
+    if (length (remaining_packages) == 0)
+      unlink (local_list);
+    else
+      local_packages = save_order (remaining_packages);
+      save (local_list, "local_packages");
+    endif
+  endif
+
+endfunction