Deion I noticed some things such as treesitter syntax highli

bufnr = vim.api.nvim_get_current_buf()
vim.fn.bufload(bufnr)
local group = vim.api.nvim_create_augroup('testgroup', {})
vim.api.nvim_create_autocmd({ 'BufNewFile', 'BufRead', 'BufFilePost' }, {
  group = group,
  callback = function(args)
    print("hello world")
  end,
})

The autocmd never fires, because it was registered after bufload() was called!

The reason why this doesn't happen with syntax off is because vim.treesitter.get_parser() can't figure out the file's language in that case, and errors out.

Solution:

diff --git a/lua/treesitter-context/context.lua b/lua/treesitter-context/context.lua
index 5339c80..aaf5ae6 100644
--- a/lua/treesitter-context/context.lua
+++ b/lua/treesitter-context/context.lua
@@ -253,6 +253,14 @@ end
 --- @param winid integer
 --- @return Range4[]?, string[]?
 function M.get(bufnr, winid)
+  -- vim.treesitter.get_parser() calls bufload(), but we don't actually want to load the buffer:
+  -- this method is called during plugin init, before other plugins or the user's config
+  -- have a chance to initialize.
+  -- They may want to register autocmds, and this would prevent them from firing.
+  if vim.fn.bufloaded(bufnr) == 0 then
+    return
+  end
+
   if not pcall(vim.treesitter.get_parser, bufnr) then
     return
   end

I'll open a PR.

Also, the reason why this regressed. This is what it looked like before:

nvim-treesitter-context/lua/treesitter-context/context.lua

Lines 210 to 219 in b8b7e52

 function M.get(bufnr, winid) 

 local max_lines = calc_max_lines(winid) 

 if max_lines == 0 then 

 return 

 end 

 if not pcall(vim.treesitter.get_parser, bufnr) then 

 return 

 end

calc_max_lines() always returns 0 at startup since the cursor is at the top of the window. This accidentally guarded get_parser() from being called so early, but it was removed in that commit.

from nvim-treesitter-context.

Regression: some other things are broken at startup with `syntax on` about nvim-treesitter-context HOT 1 OPEN

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	function M.get(bufnr, winid)
	local max_lines = calc_max_lines(winid)

	if max_lines == 0 then
	return
	end

	if not pcall(vim.treesitter.get_parser, bufnr) then
	return
	end