Upgrade Notice from readme.txt not working in Themes

[ciorici]

Hi!

I noticed that adding an "Upgrade Notice" section in the readme.txt files of themes is not working, and those messages are not appearing on the Updates page in the Dashboard.

It would be really useful if that section could be detected so we can inform users about important updates, just like it works with Plugins.

Here's an example of readme.txt:
​https://themes.svn.wordpress.org/edublock/1.1.4/readme.txt

Thank you

[Otto42]

Themes do not have readme.txt files. The theme team can recommend them, but they are not part of the theme directory or system, as they are with plugins.

[ciorici]

@Otto42 I found a mention in the handbook that Block Themes require a readme.txt file:
​https://make.wordpress.org/themes/handbook/review/required/#11-block-themes

The Theme Review Team also has a repository with a sample readme.txt file, and it's mentioned here that this is a required file (maybe this requirement is no longer relevant for Classic Themes):
​https://github.com/WPTT/sample-theme-readme

Anyway, after digging more, I've found another ticket where the same idea is already discussed and being implemented:
​https://core.trac.wordpress.org/ticket/34986

[Otto42]

There is a minimal readme.txt processing in the uploader form. However, it is not required for a theme to have such a file.

There is a difference between what the theme and core team decides for requirements versus what is actually a requirement by the underlying code of the directory system.

To implement such an upgrade notice system, code would be needed both in the core and in the theme directory to allow for such things.