Merge pull request #14366 from mfussenegger/text-document-version-zero

lsp: Accept text document edits with version zero

runtime/lua/vim/lsp/util.lua

@@ -470,6 +470,7 @@ function M.apply_text_document_edit(text_document_edit, index)
   -- `VersionedTextDocumentIdentifier`s version may be null
   --  https://microsoft.github.io/language-server-protocol/specification#versionedTextDocumentIdentifier
   if should_check_version and (text_document.version
+      and text_document.version > 0
       and M.buf_versions[bufnr]
       and M.buf_versions[bufnr] > text_document.version) then
     print("Buffer ", text_document.uri, " newer than edits.")

test/functional/plugin/lsp_spec.lua

@@ -1124,14 +1124,14 @@ describe('LSP', function()
         '2nd line of 语text';
       }, buf_lines(target_bufnr))
     end)
-    it('correctly goes ahead with the edit if the version is vim.NIL', function()
-      -- we get vim.NIL when we decode json null value.
-      local json = exec_lua[[
-        return vim.fn.json_decode("{ \"a\": 1, \"b\": null }")
-      ]]
-      eq(json.b, exec_lua("return vim.NIL"))
-
-      exec_lua('vim.lsp.util.apply_text_document_edit(...)', text_document_edit(exec_lua("return vim.NIL")))
+    it('always accepts edit with version = 0', function()
+      exec_lua([[
+        local args = {...}
+        local bufnr = select(1, ...)
+        local text_edit = select(2, ...)
+        vim.lsp.util.buf_versions[bufnr] = 10
+        vim.lsp.util.apply_text_document_edit(text_edit)
+      ]], target_bufnr, text_document_edit(0))
       eq({
         'First ↥ 🤦 🦄 line of text';
         '2nd line of 语text';