Add indentation fallback

Author: sebastianstudniczek

init.lua

@@ -1129,8 +1129,12 @@ require('lazy').setup {
         vim.wo.foldexpr = 'v:lua.vim.treesitter.foldexpr()'
         vim.wo.foldmethod = 'expr'
 
+        -- check if treesitter indentation is available for this language, and if so enable it
+        -- in case there is no indent query, the indentexpr will fallback to the vim's built in one
+        local has_indent_query = vim.treesitter.query.get(language, 'indent') ~= nil
+
         -- enables treesitter based indentation
-        vim.bo.indentexpr = "v:lua.require'nvim-treesitter'.indentexpr()"
+        if has_indent_query then vim.bo.indentexpr = "v:lua.require'nvim-treesitter'.indentexpr()" end
       end
 
       local available_parsers = require('nvim-treesitter').get_available()