refactor(lsp): replace util.buf_versions with changedtick (#28943)

`lsp.util.buf_versions` was already derived from changedtick (`on_lines`
from `buf_attach` synced the version)

As far as I can tell there is no need to keep track of the state in a
separate table.

1 files changed, 11 insertions, 5 deletions

diff --git a/runtime/lua/vim/lsp/util.lua b/runtime/lua/vim/lsp/util.lua
index 0099e82f52..d1f0e97065 100644
--- a/runtime/lua/vim/lsp/util.lua
+++ b/runtime/lua/vim/lsp/util.lua
@@ -509,8 +509,7 @@ function M.apply_text_document_edit(text_document_edit, index, offset_encoding)
     and (
       text_document.version
       and text_document.version > 0
-      and M.buf_versions[bufnr]
-      and M.buf_versions[bufnr] > text_document.version
+      and vim.b[bufnr].changedtick > text_document.version
     )
   then
     print('Buffer ', text_document.uri, ' newer than edits.')
@@ -2200,9 +2199,16 @@ function M._refresh(method, opts)
   end
 end
 
-M._get_line_byte_from_position = get_line_byte_from_position
-
 ---@nodoc
-M.buf_versions = {} ---@type table<integer,integer>
+---@deprecated
+---@type table<integer,integer>
+M.buf_versions = setmetatable({}, {
+  __index = function(_, bufnr)
+    vim.deprecate('vim.lsp.util.buf_versions', 'vim.b.changedtick', '0.13')
+    return vim.b[bufnr].changedtick
+  end,
+})
+
+M._get_line_byte_from_position = get_line_byte_from_position
 
 return M