diff -r be944660c56a -r 3d72ae0968f4 wp/wp-includes/blocks/home-link.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/blocks/home-link.php	Tue Sep 27 16:37:53 2022 +0200
@@ -0,0 +1,162 @@
+<?php
+/**
+ * Server-side rendering of the `core/home-link` block.
+ *
+ * @package WordPress
+ */
+
+/**
+ * Build an array with CSS classes and inline styles defining the colors
+ * which will be applied to the home link markup in the front-end.
+ *
+ * @param  array $context home link block context.
+ * @return array Colors CSS classes and inline styles.
+ */
+function block_core_home_link_build_css_colors( $context ) {
+	$colors = array(
+		'css_classes'   => array(),
+		'inline_styles' => '',
+	);
+
+	// Text color.
+	$has_named_text_color  = array_key_exists( 'textColor', $context );
+	$has_custom_text_color = isset( $context['style']['color']['text'] );
+
+	// If has text color.
+	if ( $has_custom_text_color || $has_named_text_color ) {
+		// Add has-text-color class.
+		$colors['css_classes'][] = 'has-text-color';
+	}
+
+	if ( $has_named_text_color ) {
+		// Add the color class.
+		$colors['css_classes'][] = sprintf( 'has-%s-color', $context['textColor'] );
+	} elseif ( $has_custom_text_color ) {
+		// Add the custom color inline style.
+		$colors['inline_styles'] .= sprintf( 'color: %s;', $context['style']['color']['text'] );
+	}
+
+	// Background color.
+	$has_named_background_color  = array_key_exists( 'backgroundColor', $context );
+	$has_custom_background_color = isset( $context['style']['color']['background'] );
+
+	// If has background color.
+	if ( $has_custom_background_color || $has_named_background_color ) {
+		// Add has-background class.
+		$colors['css_classes'][] = 'has-background';
+	}
+
+	if ( $has_named_background_color ) {
+		// Add the background-color class.
+		$colors['css_classes'][] = sprintf( 'has-%s-background-color', $context['backgroundColor'] );
+	} elseif ( $has_custom_background_color ) {
+		// Add the custom background-color inline style.
+		$colors['inline_styles'] .= sprintf( 'background-color: %s;', $context['style']['color']['background'] );
+	}
+
+	return $colors;
+}
+
+/**
+ * Build an array with CSS classes and inline styles defining the font sizes
+ * which will be applied to the home link markup in the front-end.
+ *
+ * @param  array $context Home link block context.
+ * @return array Font size CSS classes and inline styles.
+ */
+function block_core_home_link_build_css_font_sizes( $context ) {
+	// CSS classes.
+	$font_sizes = array(
+		'css_classes'   => array(),
+		'inline_styles' => '',
+	);
+
+	$has_named_font_size  = array_key_exists( 'fontSize', $context );
+	$has_custom_font_size = isset( $context['style']['typography']['fontSize'] );
+
+	if ( $has_named_font_size ) {
+		// Add the font size class.
+		$font_sizes['css_classes'][] = sprintf( 'has-%s-font-size', $context['fontSize'] );
+	} elseif ( $has_custom_font_size ) {
+		// Add the custom font size inline style.
+		$font_sizes['inline_styles'] = sprintf( 'font-size: %s;', $context['style']['typography']['fontSize'] );
+	}
+
+	return $font_sizes;
+}
+
+/**
+ * Builds an array with classes and style for the li wrapper
+ *
+ * @param  array $context    Home link block context.
+ * @return array The li wrapper attributes.
+ */
+function block_core_home_link_build_li_wrapper_attributes( $context ) {
+	$colors          = block_core_home_link_build_css_colors( $context );
+	$font_sizes      = block_core_home_link_build_css_font_sizes( $context );
+	$classes         = array_merge(
+		$colors['css_classes'],
+		$font_sizes['css_classes']
+	);
+	$style_attribute = ( $colors['inline_styles'] . $font_sizes['inline_styles'] );
+	$css_classes     = trim( implode( ' ', $classes ) ) . ' wp-block-navigation-item';
+
+	$wrapper_attributes = get_block_wrapper_attributes(
+		array(
+			'class' => $css_classes,
+			'style' => $style_attribute,
+		)
+	);
+
+	return $wrapper_attributes;
+}
+
+/**
+ * Renders the `core/home-link` block.
+ *
+ * @param array    $attributes The block attributes.
+ * @param string   $content    The saved content.
+ * @param WP_Block $block      The parsed block.
+ *
+ * @return string Returns the post content with the home url added.
+ */
+function render_block_core_home_link( $attributes, $content, $block ) {
+	if ( empty( $attributes['label'] ) ) {
+		return '';
+	}
+
+	$wrapper_attributes = block_core_home_link_build_li_wrapper_attributes( $block->context );
+
+	$aria_current = is_home() || ( is_front_page() && 'page' === get_option( 'show_on_front' ) ) ? ' aria-current="page"' : '';
+
+	$html = '<li ' . $wrapper_attributes . '><a class="wp-block-home-link__content wp-block-navigation-item__content" rel="home"' . $aria_current;
+
+	// Start appending HTML attributes to anchor tag.
+	$html .= ' href="' . esc_url( home_url() ) . '"';
+
+	// End appending HTML attributes to anchor tag.
+	$html .= '>';
+
+	if ( isset( $attributes['label'] ) ) {
+		$html .= wp_kses_post( $attributes['label'] );
+	}
+
+	$html .= '</a></li>';
+	return $html;
+}
+
+/**
+ * Register the home block
+ *
+ * @uses render_block_core_home_link()
+ * @throws WP_Error An WP_Error exception parsing the block definition.
+ */
+function register_block_core_home_link() {
+	register_block_type_from_metadata(
+		__DIR__ . '/home-link',
+		array(
+			'render_callback' => 'render_block_core_home_link',
+		)
+	);
+}
+add_action( 'init', 'register_block_core_home_link' );