From a686e4b253fd145669d352a299f1b5b41a1a1cb7 Mon Sep 17 00:00:00 2001
From: janabhumi <dmitriy@ideascup.me>
Date: Sat, 17 Sep 2022 15:59:06 +0300
Subject: [PATCH] plugin/theme: setup optional tabline plugin

---
 default.nix                    | 13 ++++++++-----
 lib.nix                        | 14 +++++++++-----
 plugins/explorer/nvim-tree.lua |  2 +-
 plugins/theme/default.nix      |  9 ++++++---
 plugins/theme/tabline.lua      |  2 ++
 5 files changed, 26 insertions(+), 14 deletions(-)
 create mode 100644 plugins/theme/tabline.lua

diff --git a/default.nix b/default.nix
index 5b5a916..fdb8607 100644
--- a/default.nix
+++ b/default.nix
@@ -3,18 +3,21 @@
 let
   lib = import ./lib.nix;
 
-  callPlugins = list: builtins.map (p: import p vimPlugins) list;
+  pluginParams = vimPlugins // { inherit lib; };
+
+  callPlugin = op: if builtins.isFunction op then op pluginParams else import op pluginParams;
+  callPlugins = list: builtins.map callPlugin list;
 
   plugins = callPlugins [
     ./plugins/syntax
     ./plugins/explorer
-    ./plugins/theme
+    (import ./plugins/theme { enableTabline = false; })
     ./plugins/lsp
     ./plugins/formatter
   ];
 
-  basicConfigs = map builtins.readFile [ ./config/basic.lua ];
-  pluginConfigs = lib.extractAttrs "luaConfig" plugins;
+  basicConfigs = builtins.map builtins.readFile [ ./config/basic.lua ];
+  pluginConfigs = builtins.catAttrs "luaConfig" plugins;
   allConfigs = basicConfigs ++ pluginConfigs;
 in
 wrapNeovim neovim-unwrapped {
@@ -25,6 +28,6 @@ wrapNeovim neovim-unwrapped {
   configure = {
     customRC = lib.mkLuaRc allConfigs;
 
-    packages.myVimPackages = { start = lib.extractAttrs "plugins" plugins; };
+    packages.myVimPackages = { start = builtins.catAttrs "plugins" plugins; };
   };
 }
diff --git a/lib.nix b/lib.nix
index c4479bd..2a198b5 100644
--- a/lib.nix
+++ b/lib.nix
@@ -19,13 +19,17 @@ rec {
     in
     foldr concat "" list;
 
-  extractAttrs = attr: list:
+  ############################################################################
+  # Configs
+
+  optional = cond: val:
     let
-      getAttr' = builtins.getAttr attr;
-      hasAttr' = builtins.hasAttr attr;
-      filteredList = builtins.filter hasAttr' list;
+      def =
+        if builtins.isList val then [ ]
+        else if builtins.isString val then ""
+        else null;
     in
-    builtins.map getAttr' filteredList;
+    if cond then val else def;
 
   #############################################################################
   # Lua
diff --git a/plugins/explorer/nvim-tree.lua b/plugins/explorer/nvim-tree.lua
index 01d6e0b..4f6182f 100644
--- a/plugins/explorer/nvim-tree.lua
+++ b/plugins/explorer/nvim-tree.lua
@@ -7,5 +7,5 @@ vim.g.loaded_netrwPlugin = 1
 -- empty setup using defaults
 require("nvim-tree").setup()
 
-vim.keymap.set("n", "<leader>nt", ":NvimTreeFocus<CR>")
+vim.keymap.set("n", "<leader>nt", ":NvimTreeToggle<CR>")
 vim.keymap.set("n", "<leader>nf", ":NvimTreeFindFile<CR>")
diff --git a/plugins/theme/default.nix b/plugins/theme/default.nix
index 7a70e5b..79f007c 100644
--- a/plugins/theme/default.nix
+++ b/plugins/theme/default.nix
@@ -1,13 +1,16 @@
-{ catppuccin-nvim, lualine-nvim, lualine-lsp-progress, ... }:
+{ enableTabline ? false }:
+
+{ lib, catppuccin-nvim, lualine-nvim, lualine-lsp-progress, tabline-nvim, ... }:
 
 {
   luaConfig = (builtins.readFile ./catppuccin-nvim.lua)
-    + (builtins.readFile ./lualine.lua);
+    + (builtins.readFile ./lualine.lua)
+    + (lib.optional enableTabline (builtins.readFile ./tabline.lua));
 
   plugins = [
     catppuccin-nvim
 
     lualine-nvim
     lualine-lsp-progress
-  ];
+  ] ++ (lib.optional enableTabline [ tabline-nvim ]);
 }
diff --git a/plugins/theme/tabline.lua b/plugins/theme/tabline.lua
new file mode 100644
index 0000000..2317233
--- /dev/null
+++ b/plugins/theme/tabline.lua
@@ -0,0 +1,2 @@
+-- See: https://github.com/kdheepak/tabline.nvim
+require("tabline").setup({})