nvim: move out lsp on_attach

.config/nvim/lua/lsp.lua

@@ -0,0 +1,32 @@
+local M = {}
+
+M.on_attach = function(client, bufnr)
+    local telescope = require("telescope.builtin")
+    local methods = vim.lsp.protocol.Methods
+    local function nnoremap(bind, callback, userargs)
+        local args = userargs or {}
+        args.buffer = bufnr
+        vim.keymap.set("n", bind, callback, args)
+    end
+
+    nnoremap("K", vim.lsp.buf.hover)
+    nnoremap("<C-k>", vim.lsp.buf.signature_help)
+    nnoremap("gd", telescope.lsp_definitions)
+    nnoremap("gu", telescope.lsp_references)
+    nnoremap("<leader>ca", vim.lsp.buf.code_action)
+    nnoremap("<leader>cl", vim.lsp.codelens.run)
+    nnoremap("<leader>r", vim.lsp.buf.rename)
+    nnoremap("<leader>f", function() vim.lsp.buf.format { async = true } end)
+
+    local filetype = vim.api.nvim_get_option_value("filetype", { buf = bufnr })
+    if
+        client:supports_method(methods.textDocument_inlayHint)
+        -- Never start cabal with inlay hint request
+        -- Related: https://github.com/mrcjkb/haskell-tools.nvim/discussions/485
+        and filetype ~= "cabal"
+    then
+        vim.lsp.inlay_hint.enable(true, { bufnr = bufnr })
+    end
+end
+
+return M

.config/nvim/plugin/lsp.lua

@@ -1,5 +1,4 @@
 local map = vim.keymap.set
-local methods = vim.lsp.protocol.Methods
 
 ----------------------
 -- Language servers --
@@ -76,32 +75,6 @@ local servers = {
 -------------
 -- Helpers --
 -------------
-local on_attach = function(client, bufnr)
-    vim.api.nvim_set_option_value("omnifunc", "v:lua.vim.lsp.omnifunc", { buf = bufnr })
-    local telescope = require("telescope.builtin")
-
-    map("n", "K", vim.lsp.buf.hover, { buffer = bufnr })
-    map("n", "<C-k>", vim.lsp.buf.signature_help, { buffer = bufnr })
-    map("n", "gd", telescope.lsp_definitions, { buffer = bufnr })
-    -- conflicts with tabs
-    -- map("n", "gtd", vim.lsp.buf.type_definition, { buffer = bufnr })
-    -- map("n", "gi", vim.lsp.buf.implementation, { buffer = bufnr })
-    map("n", "gu", telescope.lsp_references, { buffer = bufnr })
-    map("n", "<leader>ca", vim.lsp.buf.code_action, { buffer = bufnr })
-    map("n", "<leader>cl", vim.lsp.codelens.run, { buffer = bufnr })
-    map("n", "<leader>r", vim.lsp.buf.rename, { buffer = bufnr })
-    map("n", "<leader>f", function() vim.lsp.buf.format { async = true } end, { buffer = bufnr })
-
-    local filetype = vim.api.nvim_get_option_value("filetype", { buf = bufnr })
-    if
-        client:supports_method(methods.textDocument_inlayHint)
-        -- Never start cabal with inlay hint request
-        -- Related: https://github.com/mrcjkb/haskell-tools.nvim/discussions/485
-        and filetype ~= "cabal"
-    then
-        vim.lsp.inlay_hint.enable(true, { bufnr = bufnr })
-    end
-end
 
 -- Helix style border
 local border = {
@@ -142,6 +115,9 @@ capabilities = require("cmp_nvim_lsp").default_capabilities(capabilities)
 ----------
 require("fidget").setup()
 
+
+local mylsp = require('lsp')
+
 for name, config in pairs(servers) do
     require("lspconfig")[name].setup {
         capabilities = capabilities,
@@ -149,7 +125,7 @@ for name, config in pairs(servers) do
         -- NOTE: https://github.com/neovim/neovim/issues/30675
         offset_encoding = config.offset_encoding or "utf-8",
         on_attach = function(client, bufno)
-            on_attach(client, bufno);
+            mylsp.on_attach(client, bufno);
             (config.on_attach or function(...) end)(client, bufno)
         end,
     }
@@ -160,7 +136,7 @@ end
 ------------------------
 -- Java
 local config = {
-    on_attach = on_attach,
+    on_attach = mylsp.on_attach,
     capabilities = capabilities,
     cmd = {
         -- https://github.com/NixOS/nixpkgs/issues/232822#issuecomment-1564243667
@@ -212,7 +188,7 @@ metals_config.on_attach = function(client, bufnr)
     map("n", "<leader>dsi", require("dap").step_into)
     map("n", "<leader>dl", require("dap").run_last)
 
-    on_attach(client, bufnr)
+    mylsp.on_attach(client, bufnr)
 end
 local nvim_metals_group = vim.api.nvim_create_augroup("nvim-metals", { clear = true })
 vim.api.nvim_create_autocmd("FileType", {
@@ -240,7 +216,7 @@ vim.g.haskell_tools = {
             map("n", "<leader>hhr", ht.repl.toggle, opts)
 
             vim.opt_local.shiftwidth = 2
-            on_attach(client, bufnr)
+            mylsp.on_attach(client, bufnr)
         end,
         default_settings = {
             haskell = {
@@ -267,7 +243,7 @@ vim.g.haskell_tools = {
 ----------
 vim.g.rustaceanvim = {
     server = {
-        on_attach = on_attach,
+        on_attach = mylsp.on_attach,
         settings = {
             ["rust-analyzer"] = { files = { excludeDirs = { ".direnv/" } } },
         },