MU WPCOM: Port the a8c-posts-list block from ETK

[arthur791004]

Related to https://github.com/Automattic/dotcom-forge/issues/8036, https://github.com/Automattic/dotcom-forge/issues/8032

Proposed changes:

• Port the a8c-posts-list block from ETK. Note that the a8c-posts-list block is available only when it's already in the page/post, and we are not allowing people to insert this block from the editor for the new page/post. As a result, this feature is just for the backward compatibility.

Editor	Editor (Selected)	Frontend

Other information:

• Have you written new tests for your changes, if applicable?
• Have you checked the E2E test CI results, and verified that your changes do not break them?
• Have you tested your changes on WordPress.com, if applicable (if so, you'll see a generated comment below with a script to run)?

Jetpack product discussion

Does this pull request change what data or activity we track or use?

Testing instructions:

• Apply changes to your site
• Go to the editor
• Switch to Code Editor
• Enter the following code

  <!-- wp:a8c/posts-list /-->
  

• Switch back to Visual Editor
• Save changes because the block is registered only when it's saved in the post
• Refresh the page
• Make sure the block is rendered correctly
• Preview your changes
• Make sure the block is rendered correctly on frontend

[github-actions]

Are you an Automattician? Please test your changes on all WordPress.com environments to help mitigate accidental explosions.

• To test on WoA, go to the Plugins menu on a WordPress.com Simple site. Click on the "Upload" button and follow the upgrade flow to be able to upload, install, and activate the Jetpack Beta plugin. Once the plugin is active, go to Jetpack > Jetpack Beta, select your plugin, and enable the mu-wpcom/a8c-posts-list branch.

  • For jetpack-mu-wpcom changes, also add define( 'JETPACK_MU_WPCOM_LOAD_VIA_BETA_PLUGIN', true ); to your wp-config.php file.

• To test on Simple, run the following command on your sandbox:

  bin/jetpack-downloader test jetpack-mu-wpcom-plugin mu-wpcom/a8c-posts-list
  

Interested in more tips and information?

• In your local development environment, use the jetpack rsync command to sync your changes to a WoA dev blog.
• Read more about our development workflow here: PCYsg-eg0-p2
• Figure out when your changes will be shipped to customers here: PCYsg-eg5-p2

[github-actions]

Thank you for your PR!

When contributing to Jetpack, we have a few suggestions that can help us test and review your patch:

• ✅ Include a description of your PR changes.
  
• ✅ Add a "[Status]" label (In Progress, Needs Team Review, ...).
  
• ✅ Add testing instructions.
  
• ✅ Specify whether this PR includes any changes to data or privacy.
  
• ✅ Add changelog entries to affected projects
  

This comment will be updated as you work on your PR and make changes. If you think that some of those checks are not needed for your PR, please explain why you think so. Thanks for cooperation 🤖

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The e2e test report can be found here. Please note that it can take a few minutes after the e2e tests checks are complete for the report to be available.

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Once your PR is ready for review, check one last time that all required checks appearing at the bottom of this PR are passing or skipped.
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Wpcomsh plugin:

• Next scheduled release: August 6, 2024.
• Scheduled code freeze: July 29, 2024.

If you have any questions about the release process, please ask in the #jetpack-releases channel on Slack.

[okmttdhr]

It worked as expected ✅

One thing I noticed is the "Update Block" button.

After clicking the button, it turned into something like this;

Nothing seemed broken, but I wanted to ask if this is expected.

[arthur791004]

Nothing seemed broken, but I wanted to ask if this is expected.

I think it's expected!

[taipeicoder]

LGTM 👍