lib/neovim-plugin: add lazy provider

Author: khaneliman

lib/neovim-plugin.nix

@@ -194,6 +194,25 @@
                         )
                       ];
                     };
+                    plugins.lazy = lib.mkIf config.plugins.lazy.enable {
+                      plugins = [
+                        (
+                          {
+                            name = originalName;
+                            main = luaName;
+                            pkg = cfg.package;
+                            # Use provided config, otherwise fallback to normal lua content
+                            config =
+                              cfg.lazyLoad.settings.config or
+                              # We need to wrap it in a function so it doesn't execute immediately
+                              ("function()\n " + cfg.luaConfig.content + " \nend");
+                          }
+                          // (lib.removeAttrs cfg.lazyLoad.settings [
+                            "config"
+                          ])
+                        )
+                      ];
+                    };
                   })
                 ])
               )

modules/lazyload.nix

@@ -45,13 +45,14 @@ in
         ) (builtins.attrNames config.plugins);
         count = builtins.length pluginsWithLazyLoad;
       in
-      lib.optionals (count > 0 && !config.plugins.lz-n.enable) [
+      lib.optionals (count > 0 && !config.plugins.lz-n.enable && !config.plugins.lazy.enable) [
         ''
           You have enabled lazy loading support for the following plugins but have not enabled a lazy loading provider.
             ${lib.concatImapStringsSep "\n" (i: x: "${toString i}. plugins.${x}") pluginsWithLazyLoad}
 
           Currently supported lazy providers:
             - lz-n
+            - lazy
         ''
       ];
   };

tests/test-sources/plugins/lazyloading/lazy.nix

@@ -0,0 +1,139 @@
+{
+  lazy-load-neovim-plugin-configured =
+    { config, lib, ... }:
+    {
+      plugins = {
+        lazy = {
+          enable = true;
+        };
+
+        neotest = {
+          enable = true;
+          lazyLoad = {
+            enable = true;
+            settings = {
+              cmd = [ "Neotest" ];
+            };
+          };
+        };
+      };
+
+      assertions = [
+        {
+          assertion = (builtins.length config.plugins.lazy.plugins) == 1;
+          message = "`lazy.plugins` should have contained a single plugin configuration, but contained ${builtins.toJSON config.plugins.lz-n.plugins}";
+        }
+        {
+          assertion =
+            let
+              plugins = config.plugins.lazy.plugins or [ ];
+              plugin = if builtins.length plugins > 0 then builtins.head plugins else null;
+              cmd = if plugin != null && builtins.isList plugin.cmd then plugin.cmd else [ ];
+            in
+            (builtins.length cmd) == 1;
+          message = "`lazy.plugins[0].cmd` should have contained a configuration.";
+        }
+        {
+          assertion =
+            let
+              plugins = config.plugins.lazy.plugins or [ ];
+              plugin = if builtins.length plugins > 0 then builtins.head plugins else null;
+            in
+            plugin != null && lib.hasInfix config.plugins.neotest.luaConfig.content plugin.config.__raw;
+          message = "`lazy.plugins[0].after` should have contained `neotest` lua content.";
+        }
+      ];
+    };
+
+  dont-lazy-load-unconfigured =
+    { config, ... }:
+    {
+      plugins = {
+        neotest = {
+          enable = true;
+          # Empty attrset shouldn't trigger lazy loading
+          lazyLoad = { };
+        };
+        lazy = {
+          enable = true;
+        };
+      };
+
+      assertions = [
+        {
+          assertion = (builtins.length config.plugins.lazy.plugins) == 0;
+          message = "`lazy.plugins` should have contained no plugin configuration, but contained ${builtins.toJSON config.plugins.lz-n.plugins}";
+        }
+      ];
+    };
+
+  lazy-load-enabled-automatically =
+    { config, ... }:
+    {
+      plugins = {
+        lazy = {
+          enable = true;
+        };
+        neotest = {
+          enable = true;
+          lazyLoad = {
+            # Not setting lazyLoad.enable with configuration should enable
+            settings = {
+              cmd = [ "Neotest" ];
+            };
+          };
+        };
+      };
+
+      assertions = [
+        {
+          assertion = (builtins.length config.plugins.lazy.plugins) == 1;
+          message = "`lazy.plugins` should have contained a single plugin configuration, but contained ${builtins.toJSON config.plugins.lz-n.plugins}";
+        }
+        {
+          assertion =
+            let
+              plugins = config.plugins.lazy.plugins or [ ];
+              plugin = if builtins.length plugins > 0 then builtins.head plugins else null;
+              cmd = if plugin != null && builtins.isList plugin.cmd then plugin.cmd else [ ];
+            in
+            (builtins.length cmd) == 1;
+          message = "`lazy.plugins[0].cmd` should have contained a configuration.";
+        }
+      ];
+    };
+  wrap-functionless-luaConfig =
+    { config, ... }:
+    {
+      plugins = {
+        lazy = {
+          enable = true;
+        };
+        web-devicons.enable = false;
+        telescope = {
+          enable = true;
+          lazyLoad = {
+            enable = true;
+            settings = {
+              cmd = [ "Telescope" ];
+            };
+          };
+        };
+      };
+
+      assertions = [
+        {
+          assertion = (builtins.length config.plugins.lazy.plugins) == 1;
+          message = "`lazy.plugins` should have contained a single plugin configuration, but contained ${builtins.toJSON config.plugins.lz-n.plugins}";
+        }
+        {
+          assertion =
+            let
+              plugin = builtins.head config.plugins.lazy.plugins;
+            in
+            plugin.config.__raw == "function()\n " + config.plugins.telescope.luaConfig.content + " \nend";
+          message = "`lazy.plugins[0].config` should have contained a function wrapped `telescope` lua content.";
+        }
+      ];
+    };
+}