nix/prog/nvim: fix coc-nvim config

nix/progs/nvim/coc_settings.nix

@@ -1,4 +1,13 @@
 {
+  # General
+  coc.source = {
+    around.enable = true;
+    buffer.enable = true;
+    file.enable = false;
+  };
+
+
+  # LSP
   languageserver = {
     nix = {
       command = "rnix-lsp";

nix/progs/nvim/lua/basic.lua

@@ -72,8 +72,6 @@ vim.opt.formatoptions = 'jtcrq'
 vim.opt.clipboard = 'unnamedplus'
 -- Highlight line cursor is currently on.
 vim.opt.cursorline = true
--- Select the first item of popup menu automatically without inserting it.
-vim.opt.completeopt:append('noinsert')
 -- Invisible characters representation when :set list
 vim.opt.listchars = {
   tab = '→ ',

nix/progs/nvim/lua/coc.lua

@@ -1,6 +1,8 @@
 -- Smaller updatetime for CursorHold & CursorHoldI
 vim.opt.updatetime = 300
 
+-- Coc don't use completeopt
+vim.opt.completeopt = {}
 -- don't give |ins-completion-menu| messages.
 vim.opt.shortmess:append('c')
 
@@ -23,9 +25,14 @@ vim.keymap.set('i', '<C-space>', vim.fn['coc#refresh'], {
 -- Use <cr> for confirm completion, `<C-g>u` means break undo chain at current
 -- position. Coc only does snippet and additional edit on confirm.
 local function confirm_coc_completion()
-  return vim.fn.pumvisible() == 1 and "<C-y>" or "<C-g>u<CR>"
+  if vim.call'coc#pum#visible' == 1 then
+    vim.call'coc#pum#confirm'
+    return ""
+  else 
+    return "<CR>"
   end
-vim.keymap.set('i', '<CR>', confirm_coc_completion, { expr = true })
+end
+vim.keymap.set('i', '<CR>', confirm_coc_completion, { expr = true, silent = true })
 
 local sr_opts = { silent = true, remap = true }
 -- Use `[c` and `]c` for navigate diagnostics