refac: use nixpkgs lib instead

flake.nix

@@ -208,7 +208,7 @@
           buildPlugin = name: vimUtils.buildVimPlugin {
             name = name;
             src = getAttr name inputs;
-            patches = lib.optional
+            patches = lib.optionals
               (pathExists ./patches/${name})
               (map
                 (patchName: ./patches/${name}/${patchName})

lib.nix

@@ -1,65 +1,7 @@
 { lib, substituteAll, ... }:
 
 let
-  inherit (builtins) length elemAt isList isString hasAttr getAttr;
-
-  ###########################################################################
-  # Helpers
-
-  # Source: https://github.com/NixOS/nixpkgs/blob/d61bc96d16ca288c69b798b8e31eca64050098e3/lib/lists.nix
-  foldr = op: nul: list:
-    let
-      len = length list;
-      fold' = n:
-        if n == len
-        then nul
-        else op (elemAt list n) (fold' (n + 1));
-    in
-    fold' 0;
-
-  concatMap = op: list:
-    let
-      concat = (a: b: op a + b);
-    in
-    foldr concat "" list;
-
-  ############################################################################
-  # Configs
-
-  optional = cond: val:
-    let
-      def =
-        if isList val then [ ]
-        else if isString val then ""
-        else null;
-    in
-    if cond then val else def;
-
-  getAttrOpt = a: s:
-    if hasAttr a s then getAttr a s else null;
-
-  #############################################################################
-  # Lua
-
-  mkLuaHeredoc = content: ''
-    lua << EOF
-    ${content}
-    EOF
-  '';
-
-  mkLuaRc = contents: concatMap mkLuaHeredoc contents;
-
-  ############################################################################
-  # Configs
-
   readSubFile = src: params: builtins.readFile
     (substituteAll (params // { inherit src; }));
-
 in
-{
+lib // { inherit readSubFile substituteAll; }
-  inherit (lib) importJSON attrByPath;
-  inherit foldr concatMap;
-  inherit optional getAttrOpt;
-  inherit mkLuaHeredoc mkLuaRc;
-  inherit readSubFile substituteAll;
-}

neovim.nix

@@ -35,7 +35,7 @@ let
   plugins = mergeAttrs plugins';
   inherit (builtins) catAttrs readFile;
 
-  myLib = import ./lib.nix { inherit lib substituteAll; } // {
+  extLib = import ./lib.nix { inherit lib substituteAll; } // {
     inherit (nix2lua.lib) toLua LuaNil;
   };
 
@@ -43,7 +43,7 @@ let
   pluginParams = neovimPlugins // {
     inherit tree-sitter plugins enableDevIcons enableTabby enableOrgMode;
     themeCfg = theme;
-    lib = myLib;
+    lib = extLib;
   };
 
   callPlugin = plugin: callPackage plugin pluginParams;
@@ -67,6 +67,14 @@ let
   basicConfigs = map readFile [ ./config/basic.lua ];
   pluginConfigs = catAttrs "luaConfig" pluginsSettings;
   allConfigs = basicConfigs ++ pluginConfigs ++ [ extraLuaConfig ];
+
+  mkLuaHeredoc = content: ''
+    lua << EOF
+    ${content}
+    EOF
+  '';
+
+  mkLuaRc = lib.concatMapStrings mkLuaHeredoc;
 in
 (wrapNeovim neovim-unwrapped {
   inherit viAlias;
@@ -77,13 +85,13 @@ in
   withRuby = false;
 
   configure = {
-    customRC = extraConfig + myLib.mkLuaRc allConfigs;
+    customRC = extraConfig + mkLuaRc allConfigs;
 
     packages.myVimPackages = { start = allPlugins; };
   };
 }).overrideAttrs (oldAttrs: {
   passthru = oldAttrs.passthru // {
     nix2lua = nix2lua.lib;
-    inherit plugins;
+    inherit plugins allConfigs;
   };
 })

plugins/lsp/default.nix

@@ -18,14 +18,17 @@ let
     max_lines = 100;
   };
   tabbymlSettings = lib.toLua (lib.attrByPath [ "tabbyml" "settings" ] tabbymlDefaultSettings plugins);
-  tabbymlLuaConfig = lib.optional tabbymlEnable
+  tabbymlLuaConfig = lib.optionalString tabbymlEnable
     (lib.readSubFile ./cmp-tabby.lua { inherit tabbymlSettings; });
 
-  cmpSources = lib.toLua ([
+  cmpSources = lib.toLua (
+    [
       { name = "nvim_lsp"; }
       { name = "luasnip"; }
       { name = "orgmode"; }
-  ] ++ lib.optional tabbymlEnable [{ name = "cmp_tabby"; }]);
+    ]
+    ++ lib.optional tabbymlEnable { name = "cmp_tabby"; }
+  );
   cmpLuaConfig = lib.readSubFile ./nvim-cmp.lua { inherit cmpSources; };
 
   lspconfigLuaConfig = lib.readSubFile ./lspconfig.lua
@@ -37,7 +40,7 @@ let
     nvim-cmp # Autocompletion
     cmp-nvim-lsp # LSP source for nvim-cmp
     cmp-luasnip # Snippets source for nvim-cmp
-  ] ++ lib.optional tabbymlEnable [ cmp-tabby ];
+  ] ++ lib.optional tabbymlEnable cmp-tabby;
 
   lspConfigServers = lib.toLua (lib.attrByPath [ "lspConfig" "servers" ] [ ] plugins);
   lspSagaSettings = lib.toLua (lib.attrByPath [ "lspSaga" "settings" ] { } plugins);

plugins/theme/default.nix

@@ -27,10 +27,10 @@ in
 {
   luaConfig = themeConfig
     + (readFile (lib.substituteAll { src = ./lualine.lua; inherit lualineSettings; }))
-    + (lib.optional enableTabby (readFile ./tabby-nvim.lua));
+    + (lib.optionalString enableTabby (readFile ./tabby-nvim.lua));
 
   plugins = [ theme ]
     ++ lualinePlugins
-    ++ (lib.optional enableDevIcons [ nvim-web-devicons ])
+    ++ (lib.optional enableDevIcons nvim-web-devicons)
-    ++ (lib.optional enableTabby [ tabby-nvim ]);
+    ++ (lib.optional enableTabby tabby-nvim);
 }

plugins/ux/default.nix

@@ -15,7 +15,7 @@ let
 
   orgmodeEnable = lib.attrByPath [ "orgmode" "enable" ] enableOrgMode plugins;
   orgmodeSettings = lib.toLua (lib.attrByPath [ "orgmode" "settings" ] { } plugins);
-  orgmodeLuaConfig = lib.optional orgmodeEnable
+  orgmodeLuaConfig = lib.optionalString orgmodeEnable
     (lib.readSubFile ./nvim-orgmode.lua { inherit orgmodeSettings; });
 
   colorizerFiletypes = lib.toLua (lib.attrByPath [ "colorizer" "filetypes" ] lib.LuaNil plugins);
@@ -28,5 +28,5 @@ in
   luaConfig = hopLuaConfig + orgmodeLuaConfig + colorizerLuaConfig;
 
   plugins = [ hop-nvim nvim-colorizer ]
-    ++ lib.optional orgmodeEnable [ nvim-orgmode org-bullets-nvim ];
+    ++ lib.optionals orgmodeEnable [ nvim-orgmode org-bullets-nvim ];
 }