treewide: remove vsnip, add luasnip

modules/plugins/snippets/default.nix

@@ -1,5 +1,5 @@
 {
   imports = [
-    ./vsnip
+    ./luasnip
   ];
 }

modules/plugins/snippets/luasnip/config.nix

@@ -0,0 +1,17 @@
+{
+  config,
+  lib,
+  ...
+}: let
+  inherit (lib.modules) mkIf;
+
+  cfg = config.vim.snippets.luasnip;
+in {
+  config = mkIf cfg.enable {
+    vim = {
+      startPlugins = ["luasnip" "cmp-luasnip"] ++ cfg.providers;
+      autocomplete.nvim-cmp.sources = {luasnip = "[LuaSnip]";};
+      pluginRC.luasnip = cfg.loaders;
+    };
+  };
+}

modules/plugins/snippets/luasnip/default.nix

@@ -0,0 +1,6 @@
+{
+  imports = [
+    ./luasnip.nix
+    ./config.nix
+  ];
+}

modules/plugins/snippets/luasnip/luasnip.nix

@@ -0,0 +1,36 @@
+{lib, ...}: let
+  inherit (lib.options) mkEnableOption mkOption literalExpression literalMD;
+  inherit (lib.types) listOf lines;
+  inherit (lib.nvim.types) pluginType;
+in {
+  options.vim.snippets.luasnip = {
+    enable = mkEnableOption "luasnip" // {default = false;};
+    providers = mkOption {
+      type = listOf pluginType;
+      default = ["friendly-snippets"];
+      description = ''
+        The snippet provider packages.
+
+        ::: {.note}
+        These are simply appended to `vim.startPlugins`.
+        :::
+      '';
+      example = literalExpression "[\"vimPlugins.vim-snippets\"]";
+    };
+    loaders = mkOption {
+      type = lines;
+      default = "require('luasnip.loaders.from_vscode').lazy_load()";
+      defaultText = literalMD ''
+        ```lua
+        require('luasnip.loaders.from_vscode').lazy_load()
+        ```
+      '';
+      description = "Lua code used to load snippet providers.";
+      example = literalMD ''
+        ```lua
+        require("luasnip.loaders.from_snipmate").lazy_load()
+        ```
+      '';
+    };
+  };
+}

modules/plugins/snippets/vsnip/config.nix

@@ -1,30 +0,0 @@
-{
-  config,
-  lib,
-  ...
-}: let
-  inherit (lib.modules) mkIf mkMerge;
-  inherit (lib.generators) mkLuaInline;
-
-  cfg = config.vim.snippets.vsnip;
-in {
-  config = mkIf cfg.enable (mkMerge [
-    {
-      vim.startPlugins = ["vim-vsnip"];
-    }
-
-    (mkIf config.vim.autocomplete.nvim-cmp.enable {
-      vim = {
-        startPlugins = ["cmp-vsnip"];
-        autocomplete.nvim-cmp = {
-          sources = {"vsnip" = "[VSnip]";};
-          setupOpts.snippet.expand = mkLuaInline ''
-            function(args)
-              vim.fn["vsnip#anonymous"](args.body)
-            end
-          '';
-        };
-      };
-    })
-  ]);
-}

modules/plugins/snippets/vsnip/default.nix

@@ -1,5 +0,0 @@
-{
-  imports = [
-    ./vsnip.nix
-  ];
-}

modules/plugins/snippets/vsnip/vsnip.nix

@@ -1,7 +0,0 @@
-{lib, ...}: let
-  inherit (lib.options) mkEnableOption;
-in {
-  options.vim.snippets.vsnip = {
-    enable = mkEnableOption "vim-vsnip: snippet LSP/VSCode's format";
-  };
-}