neovim-flake/config/plugins/cmp.nix

{
  plugins = {
    lspkind = {
      enable = true;
      cmp.enable = true;
    };
    cmp-async-path.enable = true;
    cmp = {
      enable = true;
      settings = {
        autoEnableSources = true;
        experimental = {
          ghost_text = true;
        };
        performance = {
          debounce = 60;
          fetchingTimeout = 200;
          maxViewEntries = 30;
        };
        snippet = {
          expand = "luasnip";
        };
        formatting = {
          fields = [
            "kind"
            "abbr"
            "menu"
          ];
        };
        sources = [
          { name = "nvim_lsp"; }
          { name = "emoji"; }
          {
            name = "buffer"; # text within current buffer
            option.get_bufnrs.__raw = "vim.api.nvim_list_bufs";
            keywordLength = 3;
          }
          # { name = "copilot"; } # enable/disable copilot
          {
            name = "path"; # file system paths
            keywordLength = 3;
          }
          {
            name = "luasnip"; # snippets
            keywordLength = 3;
          }
        ];

        window = {
          completion = {
            border = "solid";
          };
          documentation = {
            border = "solid";
          };
        };

        mapping = {
          "<Tab>" = "cmp.mapping(cmp.mapping.select_next_item(), {'i', 's'})";
          "<C-n>" = "cmp.mapping.select_next_item()";
          "<C-p>" = "cmp.mapping.select_prev_item()";
          "<C-e>" = "cmp.mapping.abort()";
          "<C-b>" = "cmp.mapping.scroll_docs(-4)";
          "<C-f>" = "cmp.mapping.scroll_docs(4)";
          "<C-Space>" = "cmp.mapping.complete()";
          "<CR>" = "cmp.mapping.confirm({ select = true })";
          "<S-CR>" = "cmp.mapping.confirm({ behavior = cmp.ConfirmBehavior.Replace, select = true })";
        };
      };
    };
    cmp-nvim-lsp = {
      enable = true; # LSP
    };
    cmp-buffer = {
      enable = true;
    };
    cmp-path = {
      enable = true; # file system paths
    };
    cmp-cmdline = {
      enable = true; # autocomplete for cmdline
    };
  };
}