diff -r be944660c56a -r 3d72ae0968f4 wp/wp-includes/blocks/comment-reply-link.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/blocks/comment-reply-link.php	Tue Sep 27 16:37:53 2022 +0200
@@ -0,0 +1,80 @@
+<?php
+/**
+ * Server-side rendering of the `core/comment-reply-link` block.
+ *
+ * @package WordPress
+ */
+
+/**
+ * Renders the `core/comment-reply-link` block on the server.
+ *
+ * @param array    $attributes Block attributes.
+ * @param string   $content    Block default content.
+ * @param WP_Block $block      Block instance.
+ * @return string Return the post comment's reply link.
+ */
+function render_block_core_comment_reply_link( $attributes, $content, $block ) {
+	if ( ! isset( $block->context['commentId'] ) ) {
+		return '';
+	}
+
+	$thread_comments = get_option( 'thread_comments' );
+	if ( ! $thread_comments ) {
+		return '';
+	}
+
+	$comment = get_comment( $block->context['commentId'] );
+	if ( empty( $comment ) ) {
+		return '';
+	}
+
+	$depth     = 1;
+	$max_depth = get_option( 'thread_comments_depth' );
+	$parent_id = $comment->comment_parent;
+
+	// Compute comment's depth iterating over its ancestors.
+	while ( ! empty( $parent_id ) ) {
+		$depth++;
+		$parent_id = get_comment( $parent_id )->comment_parent;
+	}
+
+	$comment_reply_link = get_comment_reply_link(
+		array(
+			'depth'     => $depth,
+			'max_depth' => $max_depth,
+		),
+		$comment
+	);
+
+	// Render nothing if the generated reply link is empty.
+	if ( empty( $comment_reply_link ) ) {
+		return;
+	}
+
+	$classes = '';
+	if ( isset( $attributes['textAlign'] ) ) {
+		$classes .= 'has-text-align-' . $attributes['textAlign'];
+	}
+
+	$wrapper_attributes = get_block_wrapper_attributes( array( 'class' => $classes ) );
+
+	return sprintf(
+		'<div %1$s>%2$s</div>',
+		$wrapper_attributes,
+		$comment_reply_link
+	);
+}
+
+/**
+ * Registers the `core/comment-reply-link` block on the server.
+ */
+function register_block_core_comment_reply_link() {
+	register_block_type_from_metadata(
+		__DIR__ . '/comment-reply-link',
+		array(
+			'render_callback' => 'render_block_core_comment_reply_link',
+		)
+	);
+}
+
+add_action( 'init', 'register_block_core_comment_reply_link' );