Add conditions to only load treesitter and neorg on NixOS systems

Remove magma_nvim

lua/plugins/magma_nvim.lua

@@ -1,5 +0,0 @@
-return {
-    "dccsillag/magma-nvim",
-    cond = not vim.g.vscode,
-    event = { "FileType python" },
-}

lua/plugins/nvim_neorg.lua

@@ -1,6 +1,6 @@
 return {
     "nvim-neorg/neorg",
-    cond = not vim.g.vscode,
+    cond = function() return string.match(vim.loop.os_uname().version, "NixOS") and not vim.g.vscode end,
     build = ":Neorg sync-parsers",
     event = { "FileType norg" },
     cmd = "Neorg",

lua/plugins/treesitter.lua

@@ -7,6 +7,7 @@ end
 
 return {
     "nvim-treesitter/nvim-treesitter",
+    cond = function() return string.match(vim.loop.os_uname().version, "NixOS") end,
     version = false,
     build = ":TSUpdate",
     event = { "BufReadPre", "BufNewFile" },
@@ -24,19 +25,7 @@ return {
         require("nvim-treesitter.configs").setup(opts)
     end,
     opts = {
-        ensure_installed = {
+        auto_install = true,
-            "bash",
-            "fish",
-            "gitcommit",
-            "gitignore",
-            "lua",
-            "make",
-            "nix",
-            "python",
-            "vim",
-            "vimdoc",
-        },
-        auto_install = false,
         highlight = {
             enable = true,
             disable = { "fortran" },