NixConfig/modules/nix/nvim/cmp.nix

_:
let
  get_bufnrs.__raw = ''
    function()
        local buf_size_limit = 1024 * 1024 -- 1MB size limit
        local bufs = vim.api.nvim_list_bufs()
        local valid_bufs = {}
        for _, buf in ipairs(bufs) do
            if vim.api.nvim_buf_is_loaded(buf) and vim.api.nvim_buf_get_offset(buf, vim.api.nvim_buf_line_count(buf)) < buf_size_limit then
                table.insert(valid_bufs, buf)
            end
        end
        return valid_bufs
    end
  '';
in
{
  programs.nixvim.plugins = {
    cmp = {
      enable = true;
      autoEnableSources = true;
      settings = {
        mapping = {
          "<C-b>" = "cmp.mapping.scroll_docs(-4)";
          "<C-f>" = "cmp.mapping.scroll_docs(4)";
          "<C-Space>" = "cmp.mapping.complete()";
          "<C-e>" = "cmp.mapping.abort()";
          "<C-Left>" = "cmp.mapping.abort()";
          "<Up>" = "cmp.mapping.select_prev_item()";
          "<Down>" = "cmp.mapping.select_next_item()";
          "<CR>" = "cmp.mapping.confirm({ select = false })";
        };

        preselect = "cmp.PreselectMode.None";
        snippet.expand = "function(args) require('luasnip').lsp_expand(args.body) end";

        sources = [
          {
            name = "nvim_lsp";
            priority = 1000;
            option = {
              inherit get_bufnrs;
            };
          }
          {
            name = "nvim_lsp_signature_help";
            priority = 1000;
            option = {
              inherit get_bufnrs;
            };
          }
          {
            name = "nvim_lsp_document_symbol";
            priority = 1000;
            option = {
              inherit get_bufnrs;
            };
          }
          {
            name = "treesitter";
            priority = 850;
            option = {
              inherit get_bufnrs;
            };
          }
          {
            name = "luasnip";
            priority = 750;
          }
          {
            name = "buffer";
            priority = 500;
            option = {
              inherit get_bufnrs;
            };
          }
          {
            name = "path";
            priority = 300;
          }
          {
            name = "cmdline";
            priority = 300;
          }
          {
            name = "git";
            priority = 250;
          }
          {
            name = "calc";
            priority = 150;
          }
          {
            name = "emoji";
            priority = 100;
          }
        ];
      };
    };

    friendly-snippets.enable = true;
    luasnip.enable = true;

    lspkind = {
      enable = true;
      cmp = {
        enable = true;
        menu = {
          buffer = "";
          calc = "";
          cmdline = "";
          codeium = "󱜙";
          emoji = "󰞅";
          git = "";
          luasnip = "󰩫";
          neorg = "";
          nvim_lsp = "";
          nvim_lua = "";
          path = "";
          spell = "";
          treesitter = "󰔱";
        };
      };
    };
  };
}