Remove at-meta, at-setup, at-docs from search index (#2675)

Co-authored-by: Morten Piibeleht <morten.piibeleht@gmail.com>

Author: Rahban1

CHANGELOG.md

@@ -3,6 +3,12 @@
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+
+## Fixed
+
+* `@meta`, `@setup`, and `@docs` blocks no longer generate spurious entries in the search index. ([#1929], [#2675])
+
 ## Version [v1.10.1] - 2025-03-31
 
 ### Fixed

src/html/HTMLWriter.jl

@@ -713,6 +713,20 @@ function SearchRecord(ctx, navnode, node::Node, ::MarkdownAST.AbstractElement)
     return SearchRecord(ctx, navnode; text = mdflatten(node))
 end
 
+# Returns nothing for nodes that shouldn't be indexed in search
+const _SEARCHRECORD_IGNORED_BLOCK_TYPES = Union{
+    Documenter.MetaNode,
+    Documenter.DocsNodesBlock,
+    Documenter.SetupNode,
+}
+function searchrecord(ctx::HTMLContext, navnode::Documenter.NavNode, node::Node)
+    # Skip indexing special at-blocks
+    if node.element isa _SEARCHRECORD_IGNORED_BLOCK_TYPES
+        return nothing
+    end
+    return SearchRecord(ctx, navnode, node, node.element)
+end
+
 function JSON.lower(rec::SearchRecord)
     # Replace any backslashes in links, if building the docs on Windows
     src = replace(rec.src, '\\' => '/')
@@ -1680,8 +1694,10 @@ end
 function domify(dctx::DCtx)
     ctx, navnode = dctx.ctx, dctx.navnode
     return map(getpage(ctx, navnode).mdast.children) do node
-        rec = SearchRecord(ctx, navnode, node, node.element)
-        push!(ctx.search_index, rec)
+        rec = searchrecord(ctx, navnode, node)
+        if !isnothing(rec)
+            push!(ctx.search_index, rec)
+        end
         domify(dctx, node, node.element)
     end
 end