Add xxx_installer::upgrade($version) method so that upgrade stanzas
are separate from install stanzas. In the old code, to do an upgrade
meant that you had to re-evolve everything from the initial install
because we'd step through each version's changes. But what we really
want is for the initial install to start off in the perfect initial
state, and the upgrades to do the work behind the scenes. So now the
install() function gets things set up properly the first time, and the
upgrade() function does any work to catch you up to the latest code.
See gallery_installer.php for a good example.
and Gallery 3 have a class named Gallery. Clone a subset of the
Gallery 2 files and munge them so that we can rename the Galery 2
version to G2_Gallery.
Also, update the disclaimer in Admin > Settings > Gallery 2 Import.
Install: <module>_installer::install() is called, any necessary tables
are created.
Activate: <module>_installer::activate() is called. Module
controllers are routable, helpers are accessible, etc. The module is
in use.
Deactivate: <module>_installer::deactivate() is called. Module code
is not accessible or routable. Module is *not* in use, but its tables
are still around.
Uninstall: <module>_installer::uninstall() is called. Module is
completely removed from the database.
Admin > Modules will install and activate modules, but will only
deactivate (will NOT uninstall modules).
around in the task so that on subsequent import runs we don't try to
reimport stuff we've already pulled in. This also gives us a mapping
so that we will be able to translate old G2 urls into the hot new G3
urls.
