add debounce setup in lsp

lua/navigator/formatting.lua

@@ -0,0 +1,24 @@
+-- https://github.com/wention/dotfiles/blob/master/.config/nvim/lua/config/lsp.lua
+-- https://github.com/lukas-reineke/dotfiles/blob/master/vim/lua/lsp/handlers.lua
+return {
+  format_hdl = function(err, _, result, _, bufnr) -- FIXME: bufnr is nil
+    if err ~= nil or result == nil then
+      return
+    end
+
+    -- If the buffer hasn't been modified before the formatting has finished,
+    -- update the buffer
+    if not vim.api.nvim_buf_get_option(bufnr, 'modified') then
+      local view = vim.fn.winsaveview()
+      vim.lsp.util.apply_text_edits(result, bufnr)
+      vim.fn.winrestview(view)
+      -- FIXME: commented out as a workaround
+      -- if bufnr == vim.api.nvim_get_current_buf() then
+      vim.api.nvim_command('noautocmd :update')
+
+      -- Trigger post-formatting autocommand which can be used to refresh gitgutter
+      -- vim.api.nvim_command('silent doautocmd <nomodeline> User FormatterPost')
+      -- end
+    end
+  end
+}

lua/navigator/lspclient/attach.lua

@@ -53,6 +53,7 @@ M.on_attach = function(client, bufnr)
     trace(client.name, "custom attach")
     config.lsp[client.name].on_attach(client, bufnr)
   end
+
 end
 
 -- M.setup = function(cfg)

lua/navigator/lspclient/clients.lua

@@ -103,6 +103,7 @@ local setups = {
     },
     settings = {
       gopls = {
+        flags = { allow_incremental_sync = true, debounce_text_changes = 500 },
         analyses = {unusedparams = true, unreachable = false},
         codelenses = {
           generate = true, -- show the `go generate` lens.
@@ -124,6 +125,7 @@ local setups = {
     end
   },
   clangd = {
+    flags = { allow_incremental_sync = true, debounce_text_changes = 500 },
     cmd = {
       "clangd", "--background-index", "--suggest-missing-includes", "--clang-tidy",
       "--header-insertion=iwyu"
@@ -148,7 +150,8 @@ local setups = {
         cargo = {loadOutDirsFromCheck = true},
         procMacro = {enable = true}
       }
-    }
+    },
+    flags = { allow_incremental_sync = true, debounce_text_changes = 500 },
   },
   sqls = {
     filetypes = {"sql"},
@@ -157,6 +160,7 @@ local setups = {
       highlight.diagnositc_config_sign()
       require"sqls".setup {picker = "telescope"} -- or default
     end,
+    flags = { allow_incremental_sync = true, debounce_text_changes = 500 },
     settings = {
       cmd = {"sqls", "-config", "$HOME/.config/sqls/config.yml"}
       -- alterantively:
@@ -172,6 +176,7 @@ local setups = {
     cmd = {"lua-language-server"},
     filetypes = {"lua"},
     on_attach = on_attach,
+    flags = { allow_incremental_sync = true, debounce_text_changes = 500 },
     settings = {
       Lua = {
         runtime = {
@@ -199,6 +204,7 @@ local setups = {
   pyright = {
     cmd = {"pyright-langserver", "--stdio"},
     filetypes = {"python"},
+    flags = { allow_incremental_sync = true, debounce_text_changes = 500},
     settings = {
       python = {
         analysis = {
@@ -215,7 +221,8 @@ local setups = {
       root_dir = [[ util.root_pattern("compile_commands.json", "compile_flags.txt", "CMakeLists.txt", "Makefile", ".git") or util.path.dirname ]],
       index = {threads = 2},
       clang = {excludeArgs = {"-frounding-math"}}
-    }
+    },
+    flags = { allow_incremental_sync = true },
   }
 }
 
@@ -227,7 +234,7 @@ local servers = {
   "terraformls"
 }
 
-local default_cfg = {on_attach = on_attach}
+local default_cfg = {on_attach = on_attach, flags = { allow_incremental_sync = true, debounce_text_changes = 500 },}
 
 -- check and load based on file type
 local function load_cfg(ft, client, cfg, loaded)
@@ -290,6 +297,7 @@ local function wait_lsp_startup(ft, retry, lsp_opts)
         trace(cfg)
       end
 
+
       load_cfg(ft, lspclient, cfg, loaded)
       ::continue::
     end

lua/navigator/lspclient/mapping.lua

@@ -199,6 +199,7 @@ function M.setup(user_opts)
   end
 
   vim.lsp.handlers["textDocument/hover"] = vim.lsp.with(vim.lsp.handlers.hover, {border = single})
+  vim.lsp.handlers["textDocument/formatting"] = require"navigator.formatting".format_hdl
 end
 
 return M