Best way to provide themes as per magento updates

Question

I am developing a custom theme (built off 1.9.0.1, i know older version already) and have a few phtml overrides via local.xml but as per comment at Invalid method Mage_Catalog_Block_Product_View::_isSecure(Array ( ) ) what is the best way to provide custom themes that don't conflict with magento versions, see below;

• Supply Theme package for each magento version (specify magento version supported)
• One theme package with a version check (in the phtml file(s)) as per conflicts when mismatched
• or another way to manage theme updating/changes

Is there access to public list of edited/updated/compared files per magento version as obviously it would be a nightmare to check each file for different code

Answer 1

For Magento 1, you can use this inofficial mirror on GitHub: https://github.com/OpenMage/magento-mirror/

Then use git diff or your favorite Git client to view changes. Unfortunately for each release, the "copyright" notice in all files changes, so you probably want to exclude these:

git difftool -y -x "diff -I '-I '@license .*' -I '@copyright *Copyright .* Inc''" <commit1> <commit2>

where <commit1> and <commit2> are commit references for the versions you want to compare:

https://github.com/OpenMage/magento-mirror/commits/magento-1.9