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[Private APIs] Only prevent module re-registration if IS_WORDPRESS_CORE #48352

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merged 4 commits into from
Feb 28, 2023

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adamziel
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@adamziel adamziel commented Feb 23, 2023

Description

Gutenberg introduced a system of sharing private APIs in #46131. One of the safeguards is a check preventing the same module from opting-in twice so that contributors cannot easily gain access by pretending to be a core module.

That safeguard is only meant for WordPress core and not for the released @WordPress packages. However, right now it is opt-out and must be explicitly disabled by developers wanting to install the @WordPress packages. Let's make it opt-out instead.

In other words:

  • If we’re in WP core – prevent opting-in to private API with the same package name twice
  • If we’re not in WP core – don’t prevent it

Or:

  • Before the PR, double opt-in safeguard is enabled by default
  • After the PR, double opt-in safeguard is disabled by default AND WordPress core explicitly enables it

The corresponding PR in wordpress-develop repo makes WordPress explicitly set the IS_WORDPRESS_CORE to true:

WordPress/wordpress-develop#4121

Test plan

  1. Apply this PR
  2. Update packages/data/src/js/private-apis.js to the code snippet below
  3. Load the post editor and confirm it doesn't blow up
  4. Unapply this PR
  5. Confirm the post editor blows up
export const { lock, unlock } =
	__dangerousOptInToUnstableAPIsOnlyForCoreModules(
		'I know using unstable features means my plugin or theme will inevitably break on the next WordPress release.',
		'@wordpress/data'
	);

__dangerousOptInToUnstableAPIsOnlyForCoreModules(
	'I know using unstable features means my plugin or theme will inevitably break on the next WordPress release.',
	'@wordpress/data'
);

…opt-out

Gutenberg introduced a system of sharing private APIs in
#46131. One of the safeguards is a check preventing
the same module from opting-in twice so that contributors cannot easily
gain access by pretending to be a core module.

That safeguard is only meant for WordPress core and not for
the released @WordPress packages. However, right now it is
opt-out and must be explicitly disabled by developers wanting to
install the @WordPress packages. Let's make it opt-out instead.

This commit makes the check opt-in rather than opt-out. Its counterpart
in the wordpress-develop repo makes WordPress explicitly set
the ALLOW_EXPERIMENT_REREGISTRATION to false:

WordPress/wordpress-develop#4121
@adamziel adamziel added [Type] Bug An existing feature does not function as intended [Type] Enhancement A suggestion for improvement. Developer Experience Ideas about improving block and theme developer experience labels Feb 23, 2023
@adamziel adamziel self-assigned this Feb 23, 2023
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github-actions bot commented Feb 23, 2023

Size Change: +559 B (0%)

Total Size: 1.33 MB

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Flaky tests detected in 7e9d944.
Some tests passed with failed attempts. The failures may not be related to this commit but are still reported for visibility. See the documentation for more information.

🔍 Workflow run URL: https://github.com/WordPress/gutenberg/actions/runs/4251868954
📝 Reported issues:

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@gziolo gziolo left a comment

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I'm not the best suited to review it as I miss full context, but it seem to resolve the issue. It makes the flag optional only where necessary which is always good.

Unrelated to this PR, I saw recently that process.env is no longer integrated with webpack 5 so maybe it isn't the most future proof method but it will work for WordPress Core that we care about.

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gziolo commented Feb 28, 2023

Totally optional as I had this afterthought after clicking Approve button. Would it make sense to rename the flag to LOCK_EXPERIMENTS to better express its current role in WordPress Core?

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Thank you @gziolo !

process.env is no longer integrated with webpack 5

TIL! But it seems like it can be easily enabled with a plugin

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Would it make sense to rename the flag to LOCK_EXPERIMENTS to better express its current role in WordPress Core?

I tried to come up with a better name, but couldn't. This API is now for private APIs, not experiments, so it would have to be LOCK_PRIVATE_APIS. But then, they are locked anyway, this flag merely controls whether a module can opt-in twice. So maybe ALLOW_DOUBLE_OPT_IN_TO_PRIVATE_APIS?

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gziolo commented Feb 28, 2023

Would it make sense to rename the flag to LOCK_EXPERIMENTS to better express its current role in WordPress Core?

I tried to come up with a better name, but couldn't. This API is now for private APIs, not experiments, so it would have to be LOCK_PRIVATE_APIS. But then, they are locked anyway, this flag merely controls whether a module can opt-in twice. So maybe ALLOW_DOUBLE_OPT_IN_TO_PRIVATE_APIS?

Maybe we need IS_WORDPRESS_CORE in contrast to IS_GUTENBERG_PLUGIN?

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Ooh i like it @gziolo, let's go for that one

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gziolo commented Feb 28, 2023

I'm curious if one day we could simplify it to __IS_GUTENBERG_PLUGIN and __IS_WORDPRESS_CORE (no proces.env) as they would always resolve to undefined and we could still feed webpack with true using DefinePlugin.

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Still good to go and I like the magic global more now.

Further ideas are better suited for a different PR as it might have implications on TS and ESLint configuration.

@adamziel adamziel changed the title [Private APIs] Make the re-registration safeguard opt-in rather than opt-out [Private APIs] Make the re-registration safeguard opt-in rather than opt-out via IS_WORDPRESS_CORE Feb 28, 2023
@adamziel adamziel merged commit 09eeb8c into trunk Feb 28, 2023
@adamziel adamziel deleted the make-allow-reregistration-opt-in-rather-than-opt-outw branch February 28, 2023 11:35
@github-actions github-actions bot added this to the Gutenberg 15.3 milestone Feb 28, 2023
@adamziel adamziel changed the title [Private APIs] Make the re-registration safeguard opt-in rather than opt-out via IS_WORDPRESS_CORE [Private APIs] Only prevent module re-registration if IS_WORDPRESS_CORE Feb 28, 2023
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