plugins/spider: add plugin + test (#330)

plugins/default.nix

@@ -87,6 +87,7 @@
     ./utils/project-nvim.nix
     ./utils/presence-nvim.nix
     ./utils/specs.nix
+    ./utils/spider.nix
     ./utils/startify.nix
     ./utils/surround.nix
     ./utils/tmux-navigator.nix

plugins/utils/spider.nix

@@ -0,0 +1,79 @@
+{
+  pkgs,
+  config,
+  lib,
+  ...
+}:
+with lib; let
+  pluginName = "spider";
+  cfg = config.plugins.${pluginName};
+  helpers = import ../helpers.nix {inherit lib;};
+in {
+  options.plugins.${pluginName} =
+    helpers.extraOptionsOptions
+    // {
+      enable = mkEnableOption pluginName;
+
+      package = helpers.mkPackageOption pluginName pkgs.vimPlugins.nvim-spider;
+
+      skipInsignificantPunctuation =
+        helpers.defaultNullOpts.mkBool true "Whether to skip unsignificant punctuation.";
+
+      keymaps = {
+        silent = mkOption {
+          type = types.bool;
+          description = "Whether ${pluginName} keymaps should be silent.";
+          default = false;
+        };
+
+        motions = mkOption {
+          type = types.attrsOf types.str;
+          description = ''
+            Mappings for spider motions.
+            The keys are the motion and the values are the keyboard shortcuts.
+            The shortcut might not necessarily be the same as the motion name.
+          '';
+          default = {};
+          example = {
+            w = "w";
+            e = "e";
+            b = "b";
+            g = "ge";
+          };
+        };
+      };
+    };
+
+  config = let
+    setupOptions =
+      {
+        inherit (cfg) skipInsignificantPunctuation;
+      }
+      // cfg.extraOptions;
+
+    mappings =
+      mapAttrs'
+      (motion: key: {
+        name = key;
+        value = {
+          action = "function() require('spider').motion('${motion}') end";
+          lua = true;
+          inherit (cfg.keymaps) silent;
+          desc = "Spider-${motion}";
+        };
+      })
+      cfg.keymaps.motions;
+  in
+    mkIf cfg.enable {
+      extraPlugins = [cfg.package];
+
+      maps =
+        genAttrs
+        ["normal" "operator" "visualOnly"]
+        (mode: mappings);
+
+      extraConfigLua = ''
+        require("${pluginName}").setup(${helpers.toLuaObject setupOptions})
+      '';
+    };
+}

tests/test-sources/plugins/utils/spider.nix

@@ -0,0 +1,22 @@
+{
+  empty = {
+    plugins.spider.enable = true;
+  };
+
+  example = {
+    plugins.spider = {
+      enable = true;
+
+      skipInsignificantPunctuation = true;
+      keymaps = {
+        silent = true;
+        motions = {
+          w = "w";
+          e = "e";
+          b = "b";
+          g = "ge";
+        };
+      };
+    };
+  };
+}