Do action before #minor-publishing-actions in publish meta-box

[jonathanbardo]

I've stumble on a use case where we would have to create a custom preview button on the publish meta-box.

There is currently no hook to add custom content at the end of the #minor-publishing-actions div.

I propose adding a hook right before the division is closed.

[helen]

Adding a hook here is making me nervous for some reason, even though I usually love hooks on the edit screen. The publish metabox is already so cluttered and maintaining compat with hooks can make rethinking difficult. Would like some more opinions here.

[mordauk]

I would prefer having the option that might result in a little clutter due to plugins than to not have the option.

[helen]

I think I'm more worried about maintaining compat into the future :)

[mordauk]

Replying to helen:

I think I'm more worried about maintaining compat into the future :)

Maybe I'm just being daft but I'm having trouble thinking of compatibility issues this might raise in the future. Could you give me an example?

[jonathanbardo]

I'm also having problem with foreseeing compatibilities issues. Right now the only way we can add a custom button to the publish meta-box is at the end. Having a hook here would make it more flexible.

[SergeyBiryukov]

Related: #25279, #12567.

If we add a hook in there, it should probably be named post_submitbox_minor_actions for consistency with post_submitbox_misc_actions added in [12000], and go above <div class="clear"></div>.

[jonathanbardo]

Change name of action

[chriscct7]

Just needs docs

[wonderboymusic]

both of those actions should have $post passed to them to not have to rely on globals, which are gross

[DrewAPicture]

+ $post parameter

[DrewAPicture]

26267.2.patch​ adds a $post parameter to both the new hook and the post_submitbox_misc_actions hook (with a changelog entry).

[wonderboymusic]

In 34895:

Meta Boxes: add an action, post_submitbox_minor_actions. post_submitbox_misc_actions already exists. Pass $post to both for context - avoids having to check for a global post.

Props jonathanbardo, chriscct7, DrewAPicture.
Fixes #26267.