From 988b472d902e6116353fc2ae605bed32a37e6391 Mon Sep 17 00:00:00 2001
From: Christian Clason <c.clason@uni-graz.at>
Date: Sun, 3 Dec 2023 15:58:27 +0100
Subject: [PATCH] feat(treesitter): highlight help files by default (#26347)

---
 runtime/doc/news.txt         | 1 +
 runtime/ftplugin/help.lua    | 4 ++++
 test/old/testdir/runtest.vim | 2 ++
 3 files changed, 7 insertions(+)

diff --git a/runtime/doc/news.txt b/runtime/doc/news.txt
index f5b41f38a6..e38707fa76 100644
--- a/runtime/doc/news.txt
+++ b/runtime/doc/news.txt
@@ -269,6 +269,7 @@ The following changes to existing APIs or features add new behavior.
       vim.g.query_lint_on = {}
 <
   • Enabled treesitter highlighting for treesitter query files.
+  • Enabled treesitter highlighting for help files.
 
 • The `workspace/didChangeWatchedFiles` LSP client capability is now enabled
   by default.
diff --git a/runtime/ftplugin/help.lua b/runtime/ftplugin/help.lua
index 4cc3386167..bf3408c2d9 100644
--- a/runtime/ftplugin/help.lua
+++ b/runtime/ftplugin/help.lua
@@ -1,3 +1,7 @@
+-- use treesitter over syntax (for highlighted code blocks)
+vim.treesitter.start()
+
+-- add custom highlights for list in `:h highlight-groups`
 if vim.endswith(vim.fs.normalize(vim.api.nvim_buf_get_name(0)), '/doc/syntax.txt') then
   require('vim.vimhelp').highlight_groups()
 end
diff --git a/test/old/testdir/runtest.vim b/test/old/testdir/runtest.vim
index 928bf7693f..2d8ba60a7e 100644
--- a/test/old/testdir/runtest.vim
+++ b/test/old/testdir/runtest.vim
@@ -120,6 +120,8 @@ lang mess C
 
 " Nvim: append runtime from build dir, which contains the generated doc/tags.
 let &runtimepath ..= ',' .. expand($BUILD_DIR) .. '/runtime/'
+" Nvim: append libdir from build dir, which contains the bundled TS parsers.
+let &runtimepath ..= ',' .. expand($BUILD_DIR) .. '/lib/nvim/'
 
 let s:t_bold = &t_md
 let s:t_normal = &t_me