Changes

* The new GTK3 version of sugar toolkit would be installed with name <tt>sugar</tt>, and the old GTK2 version would be installed with name <tt>sugar_gtk2</tt>.

* The new GTK3 version of sugar toolkit would be installed with name <tt>sugar</tt>, and the old GTK2 version would be installed with name <tt>sugar_gtk2</tt>.

* Before <tt>sugar-activity</tt> imports sugar.activity (or any other sugar-toolkit class), it would look for an empty file called "GTK3_PORTED" in the activity's directory. If present, the GTK3_PORTED environment variable would be set.

* Before <tt>sugar-activity</tt> imports sugar.activity (or any other sugar-toolkit class), it would look for an empty file called "GTK3_PORTED" in the activity's directory. If present, it would run a little trick:

* sugar/__init__.py would then include the following code snippet:

  import os

  import os

  import sys

  import sys

  if not 'GTK3_PORTED' in os.environ:

  if not os.path.exists("GTK3_PORTED"):

     import sugar_gtk2

     import sugar_gtk2

     sys.modules["sugar"] = sugar_gtk2

     sys.modules["sugar"] = sugar_gtk2

* The result is that all unported/unmodified activities (without the GTK3_PORTED file) would <tt>import sugar.foo</tt> as before, but the above trick that modifies Python's module table would result in them (transparently, magically, automatically) being redirected to sugar_gtk2.foo.

* The result is that all unported/unmodified activities (without the GTK3_PORTED file) would <tt>import sugar.foo</tt> as before, but the above trick that modifies Python's module table would result in them (transparently, magically, automatically) being redirected to sugar_gtk2.foo.

* At the end of the transition period, sugar_gtk2 would be deleted in entirity, the above addition to sugar/__init__.py would be dropped, and activities could drop the GTK3_PORTED files at their leisure.

* At the end of the transition period, sugar_gtk2 would be deleted in entirity, the above addition to sugar-activity would be dropped, and activities could drop the GTK3_PORTED files at their leisure.

=== Proposed plan of action ===

=== Proposed plan of action ===