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<title>[56621] trunk: Themes: Improve performance of get_block_theme_folders function</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/56621">56621</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/56621","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>spacedmonkey</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2023-09-19 16:15:52 +0000 (Tue, 19 Sep 2023)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Themes: Improve performance of get_block_theme_folders function
                    
This commit enhances the performance of the get_block_theme_folders function by introducing a new method called get_block_template_folders within the WP_Theme class. Previously, this function suffered from poor performance due to repeated file lookups using file_exists. The new method implements basic caching, storing the result in the theme's cache, similar to how block themes are cached in the block_theme property (see <a href="https://core.trac.wordpress.org/changeset/55236">[55236]</a>).

Additionally, this change improves error handling by checking if a theme exists before attempting to look up the file. It also enhances test coverage. 

Props spacedmonkey, thekt12, swissspidy, flixos90, costdev, mukesh27.
Fixes <a href="https://core.trac.wordpress.org/ticket/58319">#58319</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludesblocktemplateutilsphp">trunk/src/wp-includes/block-template-utils.php</a></li>
<li><a href="#trunksrcwpincludesclasswpthemephp">trunk/src/wp-includes/class-wp-theme.php</a></li>
<li><a href="#trunktestsphpunittestsblocktemplatephp">trunk/tests/phpunit/tests/block-template.php</a></li>
<li><a href="#trunktestsphpunitteststhemethemeDirphp">trunk/tests/phpunit/tests/theme/themeDir.php</a></li>
</ul>

<h3>Added Paths</h3>
<ul>
<li>trunk/tests/phpunit/data/themedir1/block-theme-child-deprecated-path/</li>
<li>trunk/tests/phpunit/data/themedir1/block-theme-child-deprecated-path/block-template-parts/</li>
<li><a href="#trunktestsphpunitdatathemedir1blockthemechilddeprecatedpathblocktemplatepartssmallheaderhtml">trunk/tests/phpunit/data/themedir1/block-theme-child-deprecated-path/block-template-parts/small-header.html</a></li>
<li><a href="#trunktestsphpunitdatathemedir1blockthemechilddeprecatedpathstylecss">trunk/tests/phpunit/data/themedir1/block-theme-child-deprecated-path/style.css</a></li>
<li>trunk/tests/phpunit/data/themedir1/block-theme-child-deprecated-path/templates/</li>
<li><a href="#trunktestsphpunitdatathemedir1blockthemechilddeprecatedpathtemplatesindexhtml">trunk/tests/phpunit/data/themedir1/block-theme-child-deprecated-path/templates/index.html</a></li>
<li><a href="#trunktestsphpunitdatathemedir1blockthemechilddeprecatedpaththemejson">trunk/tests/phpunit/data/themedir1/block-theme-child-deprecated-path/theme.json</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpincludesblocktemplateutilsphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/block-template-utils.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/block-template-utils.php    2023-09-19 12:48:41 UTC (rev 56620)
+++ trunk/src/wp-includes/block-template-utils.php      2023-09-19 16:15:52 UTC (rev 56621)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -37,21 +37,15 @@
</span><span class="cx" style="display: block; padding: 0 10px">  * }
</span><span class="cx" style="display: block; padding: 0 10px">  */
</span><span class="cx" style="display: block; padding: 0 10px"> function get_block_theme_folders( $theme_stylesheet = null ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        $theme_name = null === $theme_stylesheet ? get_stylesheet() : $theme_stylesheet;
-       $root_dir   = get_theme_root( $theme_name );
-       $theme_dir  = "$root_dir/$theme_name";
-
-       if ( file_exists( $theme_dir . '/block-templates' ) || file_exists( $theme_dir . '/block-template-parts' ) ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $theme = wp_get_theme( (string) $theme_stylesheet );
+       if ( ! $theme->exists() ) {
+               // Return the default folders if the theme doesn't exist.
</ins><span class="cx" style="display: block; padding: 0 10px">                 return array(
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        'wp_template'      => 'block-templates',
-                       'wp_template_part' => 'block-template-parts',
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 'wp_template'      => 'templates',
+                       'wp_template_part' => 'parts',
</ins><span class="cx" style="display: block; padding: 0 10px">                 );
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-
-       return array(
-               'wp_template'      => 'templates',
-               'wp_template_part' => 'parts',
-       );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ return $theme->get_block_template_folders();
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px"> /**
</span></span></pre></div>
<a id="trunksrcwpincludesclasswpthemephp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/class-wp-theme.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/class-wp-theme.php  2023-09-19 12:48:41 UTC (rev 56620)
+++ trunk/src/wp-includes/class-wp-theme.php    2023-09-19 16:15:52 UTC (rev 56621)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -195,6 +195,25 @@
</span><span class="cx" style="display: block; padding: 0 10px">        private $cache_hash;
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        /**
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         * Block template folders.
+        *
+        * @since 6.4.0
+        * @var string[]
+        */
+       private $block_template_folders;
+
+       /**
+        * Default values for template folders.
+        *
+        * @since 6.4.0
+        * @var string[]
+        */
+       private $default_template_folders = array(
+               'wp_template'      => 'templates',
+               'wp_template_part' => 'parts',
+       );
+
+       /**
</ins><span class="cx" style="display: block; padding: 0 10px">          * Flag for whether the themes cache bucket should be persistently cached.
</span><span class="cx" style="display: block; padding: 0 10px">         *
</span><span class="cx" style="display: block; padding: 0 10px">         * Default is false. Can be set with the {@see 'wp_cache_themes_persistently'} filter.
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -262,7 +281,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                $cache = $this->cache_get( 'theme' );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                if ( is_array( $cache ) ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        foreach ( array( 'block_theme', 'errors', 'headers', 'template' ) as $key ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 foreach ( array( 'block_template_folders', 'block_theme', 'errors', 'headers', 'template' ) as $key ) {
</ins><span class="cx" style="display: block; padding: 0 10px">                                 if ( isset( $cache[ $key ] ) ) {
</span><span class="cx" style="display: block; padding: 0 10px">                                        $this->$key = $cache[ $key ];
</span><span class="cx" style="display: block; padding: 0 10px">                                }
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -287,16 +306,18 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        } else {
</span><span class="cx" style="display: block; padding: 0 10px">                                $this->errors = new WP_Error( 'theme_no_stylesheet', __( 'Stylesheet is missing.' ) );
</span><span class="cx" style="display: block; padding: 0 10px">                        }
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        $this->template    = $this->stylesheet;
-                       $this->block_theme = false;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 $this->template               = $this->stylesheet;
+                       $this->block_theme            = false;
+                       $this->block_template_folders = $this->default_template_folders;
</ins><span class="cx" style="display: block; padding: 0 10px">                         $this->cache_add(
</span><span class="cx" style="display: block; padding: 0 10px">                                'theme',
</span><span class="cx" style="display: block; padding: 0 10px">                                array(
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                        'block_theme' => $this->block_theme,
-                                       'headers'     => $this->headers,
-                                       'errors'      => $this->errors,
-                                       'stylesheet'  => $this->stylesheet,
-                                       'template'    => $this->template,
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                 'block_template_folders' => $this->block_template_folders,
+                                       'block_theme'            => $this->block_theme,
+                                       'headers'                => $this->headers,
+                                       'errors'                 => $this->errors,
+                                       'stylesheet'             => $this->stylesheet,
+                                       'template'               => $this->template,
</ins><span class="cx" style="display: block; padding: 0 10px">                                 )
</span><span class="cx" style="display: block; padding: 0 10px">                        );
</span><span class="cx" style="display: block; padding: 0 10px">                        if ( ! file_exists( $this->theme_root ) ) { // Don't cache this one.
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -304,18 +325,20 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        }
</span><span class="cx" style="display: block; padding: 0 10px">                        return;
</span><span class="cx" style="display: block; padding: 0 10px">                } elseif ( ! is_readable( $this->theme_root . '/' . $theme_file ) ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        $this->headers['Name'] = $this->stylesheet;
-                       $this->errors          = new WP_Error( 'theme_stylesheet_not_readable', __( 'Stylesheet is not readable.' ) );
-                       $this->template        = $this->stylesheet;
-                       $this->block_theme     = false;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 $this->headers['Name']        = $this->stylesheet;
+                       $this->errors                 = new WP_Error( 'theme_stylesheet_not_readable', __( 'Stylesheet is not readable.' ) );
+                       $this->template               = $this->stylesheet;
+                       $this->block_theme            = false;
+                       $this->block_template_folders = $this->default_template_folders;
</ins><span class="cx" style="display: block; padding: 0 10px">                         $this->cache_add(
</span><span class="cx" style="display: block; padding: 0 10px">                                'theme',
</span><span class="cx" style="display: block; padding: 0 10px">                                array(
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                        'block_theme' => $this->block_theme,
-                                       'headers'     => $this->headers,
-                                       'errors'      => $this->errors,
-                                       'stylesheet'  => $this->stylesheet,
-                                       'template'    => $this->template,
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                 'block_template_folders' => $this->block_template_folders,
+                                       'block_theme'            => $this->block_theme,
+                                       'headers'                => $this->headers,
+                                       'errors'                 => $this->errors,
+                                       'stylesheet'             => $this->stylesheet,
+                                       'template'               => $this->template,
</ins><span class="cx" style="display: block; padding: 0 10px">                                 )
</span><span class="cx" style="display: block; padding: 0 10px">                        );
</span><span class="cx" style="display: block; padding: 0 10px">                        return;
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -345,10 +368,11 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        $this->cache_add(
</span><span class="cx" style="display: block; padding: 0 10px">                                'theme',
</span><span class="cx" style="display: block; padding: 0 10px">                                array(
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                        'block_theme' => $this->is_block_theme(),
-                                       'headers'     => $this->headers,
-                                       'errors'      => $this->errors,
-                                       'stylesheet'  => $this->stylesheet,
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                 'block_template_folders' => $this->get_block_template_folders(),
+                                       'block_theme'            => $this->is_block_theme(),
+                                       'headers'                => $this->headers,
+                                       'errors'                 => $this->errors,
+                                       'stylesheet'             => $this->stylesheet,
</ins><span class="cx" style="display: block; padding: 0 10px">                                 )
</span><span class="cx" style="display: block; padding: 0 10px">                        );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -378,11 +402,12 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                $this->cache_add(
</span><span class="cx" style="display: block; padding: 0 10px">                                        'theme',
</span><span class="cx" style="display: block; padding: 0 10px">                                        array(
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                                'block_theme' => $this->block_theme,
-                                               'headers'     => $this->headers,
-                                               'errors'      => $this->errors,
-                                               'stylesheet'  => $this->stylesheet,
-                                               'template'    => $this->template,
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                         'block_template_folders' => $this->get_block_template_folders(),
+                                               'block_theme'            => $this->block_theme,
+                                               'headers'                => $this->headers,
+                                               'errors'                 => $this->errors,
+                                               'stylesheet'             => $this->stylesheet,
+                                               'template'               => $this->template,
</ins><span class="cx" style="display: block; padding: 0 10px">                                         )
</span><span class="cx" style="display: block; padding: 0 10px">                                );
</span><span class="cx" style="display: block; padding: 0 10px">                                return;
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -419,11 +444,12 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                $this->cache_add(
</span><span class="cx" style="display: block; padding: 0 10px">                                        'theme',
</span><span class="cx" style="display: block; padding: 0 10px">                                        array(
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                                'block_theme' => $this->is_block_theme(),
-                                               'headers'     => $this->headers,
-                                               'errors'      => $this->errors,
-                                               'stylesheet'  => $this->stylesheet,
-                                               'template'    => $this->template,
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                         'block_template_folders' => $this->get_block_template_folders(),
+                                               'block_theme'            => $this->is_block_theme(),
+                                               'headers'                => $this->headers,
+                                               'errors'                 => $this->errors,
+                                               'stylesheet'             => $this->stylesheet,
+                                               'template'               => $this->template,
</ins><span class="cx" style="display: block; padding: 0 10px">                                         )
</span><span class="cx" style="display: block; padding: 0 10px">                                );
</span><span class="cx" style="display: block; padding: 0 10px">                                $this->parent = new WP_Theme( $this->template, $this->theme_root, $this );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -447,11 +473,12 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                $_child->cache_add(
</span><span class="cx" style="display: block; padding: 0 10px">                                        'theme',
</span><span class="cx" style="display: block; padding: 0 10px">                                        array(
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                                'block_theme' => $_child->is_block_theme(),
-                                               'headers'     => $_child->headers,
-                                               'errors'      => $_child->errors,
-                                               'stylesheet'  => $_child->stylesheet,
-                                               'template'    => $_child->template,
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                         'block_template_folders' => $_child->get_block_template_folders(),
+                                               'block_theme'            => $_child->is_block_theme(),
+                                               'headers'                => $_child->headers,
+                                               'errors'                 => $_child->errors,
+                                               'stylesheet'             => $_child->stylesheet,
+                                               'template'               => $_child->template,
</ins><span class="cx" style="display: block; padding: 0 10px">                                         )
</span><span class="cx" style="display: block; padding: 0 10px">                                );
</span><span class="cx" style="display: block; padding: 0 10px">                                // The two themes actually reference each other with the Template header.
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -467,11 +494,12 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                        $this->cache_add(
</span><span class="cx" style="display: block; padding: 0 10px">                                                'theme',
</span><span class="cx" style="display: block; padding: 0 10px">                                                array(
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                                        'block_theme' => $this->is_block_theme(),
-                                                       'headers'     => $this->headers,
-                                                       'errors'      => $this->errors,
-                                                       'stylesheet'  => $this->stylesheet,
-                                                       'template'    => $this->template,
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                                 'block_template_folders' => $this->get_block_template_folders(),
+                                                       'block_theme'            => $this->is_block_theme(),
+                                                       'headers'                => $this->headers,
+                                                       'errors'                 => $this->errors,
+                                                       'stylesheet'             => $this->stylesheet,
+                                                       'template'               => $this->template,
</ins><span class="cx" style="display: block; padding: 0 10px">                                                 )
</span><span class="cx" style="display: block; padding: 0 10px">                                        );
</span><span class="cx" style="display: block; padding: 0 10px">                                }
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -488,11 +516,12 @@
</span><span class="cx" style="display: block; padding: 0 10px">                // We're good. If we didn't retrieve from cache, set it.
</span><span class="cx" style="display: block; padding: 0 10px">                if ( ! is_array( $cache ) ) {
</span><span class="cx" style="display: block; padding: 0 10px">                        $cache = array(
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                'block_theme' => $this->is_block_theme(),
-                               'headers'     => $this->headers,
-                               'errors'      => $this->errors,
-                               'stylesheet'  => $this->stylesheet,
-                               'template'    => $this->template,
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                         'block_theme'            => $this->is_block_theme(),
+                               'block_template_folders' => $this->get_block_template_folders(),
+                               'headers'                => $this->headers,
+                               'errors'                 => $this->errors,
+                               'stylesheet'             => $this->stylesheet,
+                               'template'               => $this->template,
</ins><span class="cx" style="display: block; padding: 0 10px">                         );
</span><span class="cx" style="display: block; padding: 0 10px">                        // If the parent theme is in another root, we'll want to cache this. Avoids an entire branch of filesystem calls above.
</span><span class="cx" style="display: block; padding: 0 10px">                        if ( isset( $theme_root_template ) ) {
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -779,15 +808,16 @@
</span><span class="cx" style="display: block; padding: 0 10px">                foreach ( array( 'theme', 'screenshot', 'headers', 'post_templates' ) as $key ) {
</span><span class="cx" style="display: block; padding: 0 10px">                        wp_cache_delete( $key . '-' . $this->cache_hash, 'themes' );
</span><span class="cx" style="display: block; padding: 0 10px">                }
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $this->template          = null;
-               $this->textdomain_loaded = null;
-               $this->theme_root_uri    = null;
-               $this->parent            = null;
-               $this->errors            = null;
-               $this->headers_sanitized = null;
-               $this->name_translated   = null;
-               $this->block_theme       = null;
-               $this->headers           = array();
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $this->template               = null;
+               $this->textdomain_loaded      = null;
+               $this->theme_root_uri         = null;
+               $this->parent                 = null;
+               $this->errors                 = null;
+               $this->headers_sanitized      = null;
+               $this->name_translated        = null;
+               $this->block_theme            = null;
+               $this->block_template_folders = null;
+               $this->headers                = array();
</ins><span class="cx" style="display: block; padding: 0 10px">                 $this->__construct( $this->stylesheet, $this->theme_root );
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1715,6 +1745,37 @@
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        /**
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         * Returns the folder names of the block template directories.
+        *
+        * @since 6.4.0
+        *
+        * @return string[] {
+        *     Folder names used by block themes.
+        *
+        *     @type string $wp_template      Theme-relative directory name for block templates.
+        *     @type string $wp_template_part Theme-relative directory name for block template parts.
+        * }
+        */
+       public function get_block_template_folders() {
+               // Return set/cached value if available.
+               if ( isset( $this->block_template_folders ) ) {
+                       return $this->block_template_folders;
+               }
+
+               $this->block_template_folders = $this->default_template_folders;
+
+               $stylesheet_directory = $this->get_stylesheet_directory();
+               // If the theme uses deprecated block template folders.
+               if ( file_exists( $stylesheet_directory . '/block-templates' ) || file_exists( $stylesheet_directory . '/block-template-parts' ) ) {
+                       $this->block_template_folders = array(
+                               'wp_template'      => 'block-templates',
+                               'wp_template_part' => 'block-template-parts',
+                       );
+               }
+               return $this->block_template_folders;
+       }
+
+       /**
</ins><span class="cx" style="display: block; padding: 0 10px">          * Enables a theme for all sites on the current network.
</span><span class="cx" style="display: block; padding: 0 10px">         *
</span><span class="cx" style="display: block; padding: 0 10px">         * @since 4.6.0
</span></span></pre></div>
<a id="trunktestsphpunitdatathemedir1blockthemechilddeprecatedpathblocktemplatepartssmallheaderhtml"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: trunk/tests/phpunit/data/themedir1/block-theme-child-deprecated-path/block-template-parts/small-header.html</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/data/themedir1/block-theme-child-deprecated-path/block-template-parts/small-header.html                               (rev 0)
+++ trunk/tests/phpunit/data/themedir1/block-theme-child-deprecated-path/block-template-parts/small-header.html 2023-09-19 16:15:52 UTC (rev 56621)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -0,0 +1,3 @@
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+<!-- wp:paragraph -->
+<p>Small Header Template Part</p>
+<!-- /wp:paragraph -->
</ins><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of file
</span><span class="cx" style="display: block; padding: 0 10px">Property changes on: trunk/tests/phpunit/data/themedir1/block-theme-child-deprecated-path/block-template-parts/small-header.html
</span><span class="cx" style="display: block; padding: 0 10px">___________________________________________________________________
</span></span></pre></div>
<a id="svneolstyle"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: svn:eol-style</h4></div>
<ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+native
</ins><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
</span><a id="trunktestsphpunitdatathemedir1blockthemechilddeprecatedpathstylecss"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: trunk/tests/phpunit/data/themedir1/block-theme-child-deprecated-path/style.css</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/data/themedir1/block-theme-child-deprecated-path/style.css                            (rev 0)
+++ trunk/tests/phpunit/data/themedir1/block-theme-child-deprecated-path/style.css      2023-09-19 16:15:52 UTC (rev 56621)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -0,0 +1,8 @@
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+/*
+Theme Name: Block Theme Child Deprecated Path
+Theme URI: https://wordpress.org/
+Description: For testing purposes only.
+Template: block-theme
+Version: 1.0.0
+Text Domain: block-theme-child-deprecated-path
+*/
</ins><span class="cx" style="display: block; padding: 0 10px">Property changes on: trunk/tests/phpunit/data/themedir1/block-theme-child-deprecated-path/style.css
</span><span class="cx" style="display: block; padding: 0 10px">___________________________________________________________________
</span></span></pre></div>
<a id="svneolstyle"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: svn:eol-style</h4></div>
<ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+native
</ins><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
</span><a id="trunktestsphpunitdatathemedir1blockthemechilddeprecatedpathtemplatesindexhtml"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: trunk/tests/phpunit/data/themedir1/block-theme-child-deprecated-path/templates/index.html</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/data/themedir1/block-theme-child-deprecated-path/templates/index.html                         (rev 0)
+++ trunk/tests/phpunit/data/themedir1/block-theme-child-deprecated-path/templates/index.html   2023-09-19 16:15:52 UTC (rev 56621)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -0,0 +1,3 @@
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+<!-- wp:paragraph -->
+<p>Index Template</p>
+<!-- /wp:paragraph -->
</ins><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of file
</span><span class="cx" style="display: block; padding: 0 10px">Property changes on: trunk/tests/phpunit/data/themedir1/block-theme-child-deprecated-path/templates/index.html
</span><span class="cx" style="display: block; padding: 0 10px">___________________________________________________________________
</span></span></pre></div>
<a id="svneolstyle"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: svn:eol-style</h4></div>
<ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+native
</ins><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
</span><a id="trunktestsphpunitdatathemedir1blockthemechilddeprecatedpaththemejson"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: trunk/tests/phpunit/data/themedir1/block-theme-child-deprecated-path/theme.json</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/data/themedir1/block-theme-child-deprecated-path/theme.json                           (rev 0)
+++ trunk/tests/phpunit/data/themedir1/block-theme-child-deprecated-path/theme.json     2023-09-19 16:15:52 UTC (rev 56621)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -0,0 +1,71 @@
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+{
+       "version": 1,
+       "settings": {
+               "color": {
+                       "palette": [
+                               {
+                                       "slug": "light",
+                                       "name": "Light",
+                                       "color": "#f5f7f9"
+                               },
+                               {
+                                       "slug": "dark",
+                                       "name": "Dark",
+                                       "color": "#000"
+                               }
+                       ],
+                       "gradients": [
+                               {
+                                       "name": "Custom gradient",
+                                       "gradient": "linear-gradient(135deg,rgba(0,0,0) 0%,rgb(0,0,0) 100%)",
+                                       "slug": "custom-gradient"
+                               }
+                       ],
+                       "custom": false,
+                       "customGradient": false
+               },
+               "typography": {
+                       "fontSizes": [
+                               {
+                                       "name": "Custom",
+                                       "slug": "custom",
+                                       "size": "100px"
+                               }
+                       ],
+                       "customFontSize": false,
+                       "customLineHeight": true
+               },
+               "spacing": {
+                       "units": [
+                               "rem"
+                       ],
+                       "customPadding": true
+               },
+               "blocks": {
+                       "core/paragraph": {
+                               "color": {
+                                       "palette": [
+                                               {
+                                                       "slug": "light",
+                                                       "name": "Light",
+                                                       "color": "#f5f7f9"
+                                               }
+                                       ]
+                               }
+                       }
+               }
+       },
+       "customTemplates": [
+               {
+                       "name": "page-home",
+                       "title": "Homepage template"
+               }
+       ],
+       "templateParts": [
+               {
+                       "name": "small-header",
+                       "title": "Small Header",
+                       "area": "header"
+               }
+       ]
+}
</ins><span class="cx" style="display: block; padding: 0 10px">Property changes on: trunk/tests/phpunit/data/themedir1/block-theme-child-deprecated-path/theme.json
</span><span class="cx" style="display: block; padding: 0 10px">___________________________________________________________________
</span></span></pre></div>
<a id="svneolstyle"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: svn:eol-style</h4></div>
<ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+native
</ins><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
</span><a id="trunktestsphpunittestsblocktemplatephp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/tests/phpunit/tests/block-template.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/block-template.php      2023-09-19 12:48:41 UTC (rev 56620)
+++ trunk/tests/phpunit/tests/block-template.php        2023-09-19 16:15:52 UTC (rev 56621)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -276,6 +276,82 @@
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        /**
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         * @ticket 58319
+        *
+        * @covers ::get_block_theme_folders
+        *
+        * @dataProvider data_get_block_theme_folders
+        *
+        * @param string   $theme    The theme's stylesheet.
+        * @param string[] $expected The expected associative array of block theme folders.
+        */
+       public function test_get_block_theme_folders( $theme, $expected ) {
+               $wp_theme = wp_get_theme( $theme );
+               $wp_theme->cache_delete(); // Clear cache.
+
+               $this->assertSame( $expected, get_block_theme_folders( $theme ), 'Incorrect block theme folders were retrieved.' );
+               $reflection = new ReflectionMethod( $wp_theme, 'cache_get' );
+               $reflection->setAccessible( true );
+               $theme_cache  = $reflection->invoke( $wp_theme, 'theme' );
+               $cached_value = $theme_cache['block_template_folders'];
+               $reflection->setAccessible( false );
+
+               $this->assertSame( $expected, $cached_value, 'The cached value is incorrect.' );
+       }
+
+       /**
+        * Data provider.
+        *
+        * @return array[]
+        */
+       public function data_get_block_theme_folders() {
+               return array(
+                       'block-theme'                       => array(
+                               'block-theme',
+                               array(
+                                       'wp_template'      => 'templates',
+                                       'wp_template_part' => 'parts',
+                               ),
+                       ),
+                       'block-theme-deprecated-path'       => array(
+                               'block-theme-deprecated-path',
+                               array(
+                                       'wp_template'      => 'block-templates',
+                                       'wp_template_part' => 'block-template-parts',
+                               ),
+                       ),
+                       'block-theme-child'                 => array(
+                               'block-theme-child',
+                               array(
+                                       'wp_template'      => 'templates',
+                                       'wp_template_part' => 'parts',
+                               ),
+                       ),
+                       'block-theme-child-deprecated-path' => array(
+                               'block-theme-child-deprecated-path',
+                               array(
+                                       'wp_template'      => 'block-templates',
+                                       'wp_template_part' => 'block-template-parts',
+                               ),
+                       ),
+                       'this-is-an-invalid-theme'          => array(
+                               'this-is-an-invalid-theme',
+                               array(
+                                       'wp_template'      => 'templates',
+                                       'wp_template_part' => 'parts',
+                               ),
+                       ),
+                       'null'                              => array(
+                               null,
+                               array(
+                                       'wp_template'      => 'templates',
+                                       'wp_template_part' => 'parts',
+                               ),
+                       ),
+               );
+       }
+
+       /**
</ins><span class="cx" style="display: block; padding: 0 10px">          * Registers a test block to log `in_the_loop()` results.
</span><span class="cx" style="display: block; padding: 0 10px">         *
</span><span class="cx" style="display: block; padding: 0 10px">         * @param array $in_the_loop_logs Array to log function results in. Passed by reference.
</span></span></pre></div>
<a id="trunktestsphpunitteststhemethemeDirphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/tests/phpunit/tests/theme/themeDir.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/theme/themeDir.php      2023-09-19 12:48:41 UTC (rev 56620)
+++ trunk/tests/phpunit/tests/theme/themeDir.php        2023-09-19 16:15:52 UTC (rev 56621)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -176,6 +176,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        'REST Theme',
</span><span class="cx" style="display: block; padding: 0 10px">                        'Block Theme',
</span><span class="cx" style="display: block; padding: 0 10px">                        'Block Theme Child Theme',
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                        'Block Theme Child Deprecated Path',
</ins><span class="cx" style="display: block; padding: 0 10px">                         'Block Theme Child with no theme.json',
</span><span class="cx" style="display: block; padding: 0 10px">                        'Block Theme Child Theme With Fluid Layout',
</span><span class="cx" style="display: block; padding: 0 10px">                        'Block Theme Child Theme With Fluid Typography',
</span></span></pre>
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