Refactor the code

Author: oriori1703

init.lua

@@ -972,20 +972,19 @@ require('lazy').setup({
             return
           end
 
-          -- try to enable treesitter features in case the parser exists but is not available from `nvim-treesitter`
-          if not vim.tbl_contains(available_parsers, language) then
-            treesitter_try_attach(buf, language)
-            return
-          end
-
-          -- if a parser is available in `nvim-treesitter` enable it after ensuring it is installed
           local installed_parsers = require('nvim-treesitter').get_installed 'parsers'
+
           if vim.tbl_contains(installed_parsers, language) then
+            -- enable the parser if it is installed
             treesitter_try_attach(buf, language)
-          else
-            require('nvim-treesitter').install(language):await(function()
+          elseif vim.tbl_contains(available_parsers, language) then
+            -- if a parser is available in `nvim-treesitter` enable it after ensuring it is installed
+            require('nvim-treesitter.install').install(language):await(function()
               treesitter_try_attach(buf, language)
             end)
+          else
+            -- try to enable treesitter features in case the parser exists but is not available from `nvim-treesitter`
+            treesitter_try_attach(buf, language)
           end
         end,
       })