Fix theme slug and textdomain for cloned, child and sibling themes.

[matiasbenedetto]

What?

This PR should fix set correctly the theme slug, textdomain, and 'template for cloned, child, and sibling themes.

Why?

Currently, that's not working OK because in some cases the textdomain , slug and template remain unchanged when you create a clone, child or sibling theme using the plugin.

How to test

• Create a theme using clone, child, and sibling options.

• Test that the theme slug, textdomain and template for the created theme are updated on every file of the theme (style.css, templates, template parts, and patterns).

• Check that all other options still work as expected.

Fixes: #275
Fixes: https://wordpress.org/support/topic/creating-child-theme-forgets-to-replace-parent-theme-references-in-templates/

[matiasbenedetto]

If you want to test this fix you can uninstall your current version of the plugin and install this .zip that contains the changes done in this branch: create-block-theme.zip

[porg]

✅ Tested successfully

1. Disabled, uninstalled current plugin.
2. Installed plugin via "Upload plugin".
3. Activated the plugin, disabled auto-updates to avoid unintended auto updates.
4. Switched from my child theme tt3dd to the parent theme twentytwentythree.
5. Made a clear noticeable alteration: Styles → Layout → Content width: 400px.
6. WordPress → Appearance → Create Block Theme → Create child theme with the Theme Name tt3dd2 → tt3dd2.zip got created and downloaded.
7. WordPress → Appearance → Themes → Upload Theme → Uploading tt3dd2.zip ends with success message:

   Unpacking the package…
   Installing the theme…
   This theme requires a parent theme. Checking if it is installed…
   The parent theme, Twenty Twenty-Three 1.1, is currently installed.
   Theme installed successfully.
   

8. Activating theme.

• ✅ Frontend output visual check: Narrow modification is there. Header and footer are there.
• Code Inspections:
  • ✅ All files in wp-content/themes/tt3dd2/templates/*.html instead of previously falsely referring to the parent theme now all use the proper child-theme reference "theme":"tt3dd2" everywhere.
  • ✅ Customization in the parent theme that I made in step 5 made it to wp-content/themes/tt3dd2/theme.json with "layout": { "contentSize": "400px".
• 👍 Seems to be all working as it should now.

[mikachan]

This is working well for me!

Tested:

• Clone
• Child
• Sibling

The textdomain and slug are correct in all options ✅

[matiasbenedetto]

Thanks, @porg and @mikachan for reviewing and testing!