nvim-cmp: use border style

Not adding special cases to where it's used shouldn't break anything.

flake.nix

@@ -21,6 +21,7 @@
         ./flake/legacyPackages.nix
         ./flake/overlays.nix
         ./flake/packages.nix
+        ./flake/develop.nix
       ];
 
       flake = {
@@ -56,20 +57,7 @@
         };
       };
 
-      perSystem = {
-        self',
-        config,
-        pkgs,
-        ...
-      }: {
-        devShells = {
-          default = self'.devShells.lsp;
-          nvim-nix = pkgs.mkShell {packages = [config.packages.nix];};
-          lsp = pkgs.mkShell {
-            packages = with pkgs; [nil statix deadnix alejandra];
-          };
-        };
-
+      perSystem = {pkgs, ...}: {
         # Provide the default formatter. `nix fmt` in project root
         # will format available files with the correct formatter.
         # P.S: Please do not format with nixfmt! It messes with many

flake/develop.nix

@@ -0,0 +1,29 @@
+{lib, ...}: {
+  perSystem = {
+    pkgs,
+    config,
+    self',
+    ...
+  }: {
+    devShells = {
+      default = self'.devShells.lsp;
+      nvim-nix = pkgs.mkShellNoCC {packages = [config.packages.nix];};
+      lsp = pkgs.mkShellNoCC {
+        packages = with pkgs; [nil statix deadnix alejandra];
+      };
+    };
+
+    # This package exists to make development easier by providing the place and
+    # boilerplate to build a test nvf configuration. Feel free to use this for
+    # testing, but make sure to discard the changes before creating a pull
+    # request.
+    packages.dev = let
+      configuration = {};
+    in
+      (lib.nvim.neovimConfiguration {
+        inherit pkgs;
+        modules = [configuration];
+      })
+      .neovim;
+  };
+}

modules/plugins/completion/nvim-cmp/config.nix

@@ -3,13 +3,26 @@
   config,
   ...
 }: let
-  inherit (lib.modules) mkIf mkMerge;
+  inherit (lib.modules) mkIf mkMerge mkDefault;
   inherit (lib.strings) optionalString;
   inherit (lib.generators) mkLuaInline;
   inherit (lib.nvim.lua) toLuaObject;
   inherit (lib.nvim.attrsets) mapListToAttrs;
   inherit (builtins) attrNames typeOf tryEval concatStringsSep;
 
+  borders = config.vim.ui.borders.plugins.nvim-cmp;
+  # From https://github.com/hrsh7th/nvim-cmp/blob/main/lua/cmp/config/window.lua
+  # This way users can still override the options
+  windowOpts = {
+    border = borders.style;
+    winhighlight = "Normal:Normal,FloatBorder:FloatBorder,CursorLine:Visual,Search:None";
+    zindex = 1001;
+    scrolloff = 0;
+    col_offset = 0;
+    side_padding = 1;
+    scrollbar = true;
+  };
+
   cfg = config.vim.autocomplete.nvim-cmp;
   luasnipEnable = config.vim.snippets.luasnip.enable;
   getPluginName = plugin:
@@ -81,10 +94,9 @@ in {
         setupOpts = {
           sources = map (s: {name = s;}) (attrNames cfg.sources);
 
-          # TODO: try to get nvim-cmp to follow global border style
-          window = mkIf config.vim.ui.borders.enable {
-            completion = mkLuaInline "cmp.config.window.bordered()";
-            documentation = mkLuaInline "cmp.config.window.bordered()";
+          window = mkIf borders.enable {
+            completion = mkDefault windowOpts;
+            documentation = mkDefault windowOpts;
           };
 
           formatting.format = cfg.format;

modules/plugins/completion/nvim-cmp/nvim-cmp.nix

@@ -72,7 +72,7 @@ in {
     };
 
     format = mkOption {
-      type = luaInline;
+      type = nullOr luaInline;
       default = mkLuaInline ''
         function(entry, vim_item)
           vim_item.menu = (${toLuaObject cfg.sources})[entry.source.name]