1 files changed, 46 insertions, 3 deletions
diff --git a/runtime/lua/vim/lsp.lua b/runtime/lua/vim/lsp.lua
index 26700288af..93ec9ed624 100644
--- a/runtime/lua/vim/lsp.lua
+++ b/runtime/lua/vim/lsp.lua
@@ -483,6 +483,13 @@ end
 ---     result. You can use this with `client.cancel_request(request_id)`
 ---     to cancel the request.
 ---
+---  - request_sync(method, params, timeout_ms, bufnr)
+---     Sends a request to the server and synchronously waits for the response.
+---     This is a wrapper around {client.request}
+---     Returns: { err=err, result=result }, a dictionary, where `err` and `result` come from
+---     the |lsp-handler|. On timeout, cancel or error, returns `(nil, err)` where `err` is a
+---     string describing the failure reason. If the request was unsuccessful returns `nil`.
+---
 ---  - notify(method, params)
 ---     Sends a notification to an LSP server.
 ---     Returns: a boolean to indicate if the notification was successful. If
@@ -891,6 +898,42 @@ function lsp.start_client(config)
   end
 
   --@private
+  --- Sends a request to the server and synchronously waits for the response.
+  ---
+  --- This is a wrapper around {client.request}
+  ---
+  --@param method (string) LSP method name.
+  --@param params (table) LSP request params.
+  --@param timeout_ms (number, optional, default=1000) Maximum time in
+  ---milliseconds to wait for a result.
+  --@param bufnr (number) Buffer handle (0 for current).
+  --@returns { err=err, result=result }, a dictionary, where `err` and `result` come from the |lsp-handler|.
+  ---On timeout, cancel or error, returns `(nil, err)` where `err` is a
+  ---string describing the failure reason. If the request was unsuccessful
+  ---returns `nil`.
+  --@see |vim.lsp.buf_request_sync()|
+  function client.request_sync(method, params, timeout_ms, bufnr)
+    local request_result = nil
+    local function _sync_handler(err, _, result)
+      request_result = { err = err, result = result }
+    end
+
+    local success, request_id = client.request(method, params, _sync_handler,
+      bufnr)
+    if not success then return nil end
+
+    local wait_result, reason = vim.wait(timeout_ms or 1000, function()
+      return request_result ~= nil
+    end, 10)
+
+    if not wait_result then
+      client.cancel_request(request_id)
+      return nil, wait_result_reason[reason]
+    end
+    return request_result
+  end
+
+  --@private
   --- Sends a notification to an LSP server.
   ---
   --@param method (string) LSP method name.
@@ -1289,12 +1332,12 @@ end
 ---
 --- Calls |vim.lsp.buf_request_all()| but blocks Nvim while awaiting the result.
 --- Parameters are the same as |vim.lsp.buf_request()| but the return result is
---- different. Wait maximum of {timeout_ms} (default 100) ms.
+--- different. Wait maximum of {timeout_ms} (default 1000) ms.
 ---
 --@param bufnr (number) Buffer handle, or 0 for current.
 --@param method (string) LSP method name
 --@param params (optional, table) Parameters to send to the server
---@param timeout_ms (optional, number, default=100) Maximum time in
+--@param timeout_ms (optional, number, default=1000) Maximum time in
 ---      milliseconds to wait for a result.
 ---
 --@returns Map of client_id:request_result. On timeout, cancel or error,
@@ -1307,7 +1350,7 @@ function lsp.buf_request_sync(bufnr, method, params, timeout_ms)
     request_results = it
   end)
 
-  local wait_result, reason = vim.wait(timeout_ms or 100, function()
+  local wait_result, reason = vim.wait(timeout_ms or 1000, function()
     return request_results ~= nil
   end, 10)