GitHub Actions: Fix PHP file change detection filter pattern

[t-hamano]

Fixed regression caused by #59653

What?

I've noticed that PRs that include changes to PHP files don't automatically have a comment added to encourage them to backport to the core. This PR ensures that GitHub Actions correctly detects PHP changes and that the GitHub Actions adds a comment.

Below are examples of PRs showing that this Props Bot was not working.

• https://github.com/WordPress/gutenberg/pull/59531
• https://github.com/WordPress/gutenberg/pull/59887
• https://github.com/WordPress/gutenberg/pull/60106
• https://github.com/WordPress/gutenberg/pull/60349

Why?

In #59653, We changed the filter pattern as follows.

# From
- name: Get changed PHP files
  with:
      files: |
          *.{php}
          lib/**
          phpunit/**
# To
- name: Get changed PHP files
  with:
      files: |
          **.{php}

According to the documentation, curly brackets cannot be allowed as a pattern. In other words, it seems that the pattern .{php} did not originally work. As a result, it seems that file changes are no longer detected at all.

How?

Removed curly brackets. This should now detect changes to all PHP files.

Testing Instructions

By e81c37a I temporarily made changes to a PHP file. GitHub Actions correctly detected file changes and added a comment. Then I removed the PHP changes by e1b5219. GitHub Actions updated the existing comment with a comment indicating that no PHP files were changed in the latest commit.

[github-actions[bot]]

This pull request changed or added PHP files in previous commits, but none have been detected in the latest commit.

Thank you! :heart:

[github-actions[bot]]

The following accounts have interacted with this PR and/or linked issues. I will continue to update these lists as activity occurs. You can also manually ask me to refresh this list by adding the props-bot label.

If you're merging code through a pull request on GitHub, copy and paste the following into the bottom of the merge commit message.

Co-authored-by: t-hamano <[email protected]>
Co-authored-by: ironprogrammer <[email protected]>

To understand the WordPress project's expectations around crediting contributors, please review the Contributor Attribution page in the Core Handbook.

[github-actions[bot]]

Size Change: 0 B

Total Size: 1.74 MB

ℹ️ View Unchanged

Filename	Size
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build/annotations/index.min.js	2.27 kB
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build/token-list/index.min.js	582 B
build/url/index.min.js	3.74 kB
build/vendors/inert-polyfill.min.js	2.48 kB
build/vendors/react-dom.min.js	41.7 kB
build/vendors/react.min.js	4.03 kB
build/viewport/index.min.js	957 B
build/warning/index.min.js	249 B
build/widgets/index.min.js	7.11 kB
build/widgets/style-rtl.css	1.17 kB
build/widgets/style.css	1.17 kB
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_{compressed-size-action}

[t-hamano]

@ironprogrammer Thanks for the review!

I made changes to some files after surrounding the pattern with quotes, but the file changes are no longer detected.

• Commit: https://github.com/WordPress/gutenberg/pull/61183/commits/58946ba0d494ec5d28c9fa2a59e791c8bb30e7d4
• Actions: https://github.com/WordPress/gutenberg/actions/runs/8994826203/job/24708874341?pr=61183

After that, when I deleted the quote, the change was detected successfully.

• Commit: https://github.com/WordPress/gutenberg/pull/61183/commits/3a1c83e95ede74ddaebbfb8b02f366630c4c550e
• Actions: https://github.com/WordPress/gutenberg/actions/runs/8994894679/job/24709042286?pr=61183

When I checked the README of the actual action, I found the following statement.

with:
  # Avoid using single or double quotes for multiline patterns
  files: |
     **.md

Therefore, quotes may not be necessary for this action.

[ironprogrammer]

In response to @t-hamano:

  # Avoid using single or double quotes for multiline patterns
  files: |
     **.md

Ah, interesting -- good to know!

[ironprogrammer]

@t-hamano, what do you think about addressing the intent behind the directory filters that were originally introduced in 3c34c484a9e370b8b7661b95f4745b8c65b6359e?

The workflow's intent is stated as, "Confirm if PHP changes require backporting to WordPress Core", but this could include other file types that should be reviewed and/or synced. E.g. something like this:

      files: |
          lib/**
          packages/**/*.php
          phpunit/**

This update would isolate changes in repo locations that are known to be sync points or otherwise affect Core, including PHP changes in packages, and non-PHP assets (e.g. images and fonts for unit tests, etc).

(I also discussed the possibility of a !lib/experimental/** exclusion with @azaozz and @anton-vlasenko, but we agreed that experimental features, while not necessarily destined for Core merge, could benefit from earlier attention...possibly improving their chances of being promoted to stable at some point. As a follow-up to this PR, the workflow could also add PHP-specific labels to make these more discoverable for PHP code review.)

[t-hamano]

what do you think about addressing the intent behind the directory filters that were originally introduced in 3c34c484a9e370b8b7661b95f4745b8c65b6359e?

Yes, this pattern could be improved.

I understand the background behind the introduction of this GitHub Actions, but it was updated to purely catch all PHP file changes (see this discussion)

However, there are files other than PHP files that need to be backported to core, such as lib/theme.json.

For example, how about targeting all PHP files and all files in the lib directory as shown below?

files: |
    **.php
    lib/**

[ironprogrammer]

Thanks for sharing that discussion. I guess it should be reconciled to clarify whether any PHP file change in the Gutenberg repo is intended here (including plugin-specific code in the root, bin, test), versus to specifically highlight "PHP changes [that may] require backporting to WordPress Core".

The docs for Back-merging code to WordPress Core call out lib and phpunit directly, seeming to support the latter intention. In addition to reminding PR authors that a backport may be necessary, this is a good signal for other PHP-focused contributors to take notice and have an opportunity to get involved.

Additionally, I'd argue that PHP changes to packages are also worth drawing attention, even though (or maybe because) they are automatically synced to Core -- which is why I included that in the suggested filter above. Being conscious of the signal-to-noise ratio, I think that including an occasional "Core" PHP change that doesn't need review or syncing is a better outcome than missing it altogether.

[t-hamano]

Thank you for the advice. According to the documentation and your opinion, indeed that pattern may be ideal for now. I updated the pattern via b57fa24 and f7fde90.