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Add theme.json v1 reference and v1 to v2 migration docs #37886

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merged 18 commits into from
Jan 14, 2022

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@ajlende ajlende commented Jan 11, 2022

Alternative to #37772

In WordPress 5.9, we're evolving theme.json to the v2 version: it introduces new fields and renames some old ones. Since theme authors can use either v1 or v2, the documentation needs to clarify which fields are available in which version.

Having separate docs pages for different versions of the schema has some benefits.

  • This way we can permalink to an older version of the documentation prior to the rename if someone is still on the old version.
  • New theme devs don't really care about what a property used to be named, so omitting that information can clear up additional noise from the documentation.
  • And having a separate migration doc would also be useful so you don't have to go searching through the new documentation to find the renames—they can be listed all in one place for convenience when you're upgrading.

The drawbacks are in maintaining these docs.

  • For now, when updating the theme.json version, will require manually copying the documentation to a new page like we have for v1.
  • We don't have an automated process for generating the migration document yet.

@ajlende ajlende added the [Type] Developer Documentation Documentation for developers label Jan 11, 2022
@ajlende ajlende self-assigned this Jan 11, 2022
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@ajlende ajlende added the Global Styles Anything related to the broader Global Styles efforts, including Styles Engine and theme.json label Jan 11, 2022
@ajlende ajlende force-pushed the add/theme-json-v2-migration-docs branch 2 times, most recently from ff438cd to 034a5a3 Compare January 11, 2022 16:15
@@ -559,10 +559,28 @@
},
{
"title": "Theme.json Reference",
"slug": "theme-json-reference",
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We may need to keep this slug as theme-json-reference as there's an existing theme-json slug here.

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@oandregal This would be /reference-guides/theme-json, so I assumed it would be okay. But I forgot to do a search for existing links which I'll take care of now

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Do you know if there's a way to redirect the old URL to the new one? I don't like that organizing the related docs into a folder will break the existing links

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This would be /reference-guides/theme-json, so I assumed it would be okay. But I forgot to do a search for existing links which I'll take care of now

I'm not sure how it works, to be honest.

Do you know if there's a way to redirect the old URL to the new one? I don't like that organizing the related docs into a folder will break the existing links

Yeah, that's feasible. In the past, we had to do this and it involved creating a track ticket for meta, for example https://meta.trac.wordpress.org/ticket/4388 In general, it's best to avoid asking for redirections too frequently as they are a small team. If we can go with the existing, it's going to be quicker to land this PR.

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As for the slug names, what do you think of having:

Thinking out loud: when the time comes to freeze the v2 we have to extract the living to a v2 doc that will be manually curated from then on. We could even add a notice in the top-level of this doc explaining this and linking to the latest stable doc.

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The rest of the names changes seem good to me. I'll get those changes pushed up here soon and ask in #meta on slack to see if they know about using the same slug nested differently. (slack link)

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Also asked in #docs and it sounds like we probably can't reuse a slug which leaves the question: are we okay with https://developer.wordpress.org/block-editor/reference-guides/theme-json-reference/ changing to the new ToC page instead of redirecting it to the living reference like it was before?

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Seeing as we can't reuse slugs, we probably want something more specific than living, v1, and migrations.

EDIT:

I pushed c12ebed477a0db5fb92625d1b84d3ee9408f5b73 to rename the paths as:

  • .../theme-json-reference/
  • .../theme-json-reference/theme-json-unstable/
  • .../theme-json-reference/theme-json-v1/
  • .../theme-json-reference/theme-json-migrations/

The question above about redirection still stands.

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are we okay with https://developer.wordpress.org/block-editor/reference-guides/theme-json-reference/ changing to the new ToC page instead of redirecting it to the living reference like it was before?

I think this should be fine.

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I see we use "living" in some places and "unstable" in others (file names, titles, etc). Would you mind consolidating everything to "living"?

Just a personal preference. Now that I see "unstable" it sounds less than ideal, as the theme.json is "stable" in that it works, just it can change. If you feel strongly either way (or any other option), go for it. As long as we use the same name everywhere we're fine.

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Hey, I've pushed a couple of minor changes to the contents of v1 and migration docs. This is a far better experience for readers than #37772

In terms of contents I think this is ready, the only remaining thing is the slugs.

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ajlende commented Jan 12, 2022

@oandregal I opened #37925 to update the v1 schema in wp/5.8 to match the changes you made here.

@ajlende ajlende force-pushed the add/theme-json-v2-migration-docs branch from ef84f73 to cf2558a Compare January 13, 2022 14:09
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Nice work here, Alex!

@oandregal oandregal merged commit 1cf3f88 into trunk Jan 14, 2022
@oandregal oandregal deleted the add/theme-json-v2-migration-docs branch January 14, 2022 08:45
@github-actions github-actions bot added this to the Gutenberg 12.5 milestone Jan 14, 2022
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