refactor(treesitter): use native neovim APIs

lua/config/treesitter.lua

@@ -0,0 +1,46 @@
+local treesitter_filetypes = {
+  "lua",
+  "c",
+  "cpp",
+  "python",
+  "nix",
+  "rust",
+  "bash",
+  "markdown",
+  "html",
+  "javascript",
+  "javascriptreact",
+  "css",
+  "vim",
+  "gitconfig",
+  "gitrebase",
+  "gitattributes",
+  "gitcommit",
+  "gitignore",
+}
+
+local language_by_filetype = {
+  gitconfig = "git_config",
+  gitrebase = "git_rebase",
+  javascriptreact = "javascript",
+}
+
+for filetype, language in pairs(language_by_filetype) do
+  vim.treesitter.language.register(language, filetype)
+end
+
+vim.api.nvim_create_autocmd("FileType", {
+  group = vim.api.nvim_create_augroup("config_treesitter", { clear = true }),
+  pattern = treesitter_filetypes,
+  callback = function(event)
+    local language = vim.treesitter.language.get_lang(vim.bo[event.buf].filetype)
+    if not language then
+      return
+    end
+
+    local ok, has_parser = pcall(vim.treesitter.language.add, language)
+    if ok and has_parser then
+      pcall(vim.treesitter.start, event.buf, language)
+    end
+  end,
+})