my attempt to use the treesitter rewrite

it'd be nice to use this but it forces me to chase the cli util which isn't
reasonable whatsoever, additionally:
- It can't seem to check if something is installed before attempting to
  reinstall it
- It won't shut the fuck up with all it's messages even though it's not
  even supposed to show messages by default

I'm sure the codebase is less of a mess but the ergonomics from a user
standpoint is absolutely worse.

lua/conf/plugins/treesitter.lua

@@ -1,58 +1,59 @@
-local map = core.misc.map
+local map, auto = core.misc.map, core.misc.auto
 
-return {
-  { "nvim-treesitter/nvim-treesitter",
-    config = function()
-      vim.cmd("TSUpdate")
-    end,
-    load = function()
-      require("nvim-treesitter.configs").setup {
-        -- good default parsers
-        ensure_installed = { "c", "lua", "vim", "vimdoc", "markdown",
-          "markdown_inline", "java", "bash", "css", "html", "luadoc",
-          "make", "zig"
-        },
-
-        -- indentation
-        indent = {
-          enable = true,
-
-          disable = function(lang, _)
-            -- disable indenting in php (it's more broken with than without)
-            return table.contains(({
-              "php"
-            }), lang)
-          end
-        },
-
-        -- enable highlighting
-        highlight = {
-          enable = true,
-          -- use vim highlighting in addition to treesitter
-          additional_vim_regex_highlighting = true,
-
-          disable = function(lang, buf)
-            -- disable in some files where vim's builtin highlighting is better
-            if table.contains(({
-              "diff", "tex"
-            }), lang) then
-              return true
+local function highlight(buf)
+  local lang = vim.bo[buf].ft
+  if table.contains({ "diff", "tex" }, lang) then
+    return false
   end
 
   -- disable in big files
   local ok, stats = pcall(vim.uv.fs_stat,
   vim.api.nvim_buf_get_name(buf))
   if ok and stats and stats.size > (1024 * 100 * 10) --[[1MB]] then
+    return false
+  end
+
   return true
 end
+
+local function indent(buf)
+  local lang = vim.bo[buf].ft
+  -- disable indenting in php (it's more broken with than without)
+  return not table.contains({ "php" }, lang)
 end
-        }
-      }
+
+return {
+  { "nvim-treesitter/nvim-treesitter",
+    branch = "main",
+    config = function()
+      vim.cmd("TSUpdate")
+    end,
+    load = function()
+      local treesitter = require("nvim-treesitter")
+      treesitter.setup {}
+      treesitter.install({
+        "c", "lua", "vim", "vimdoc", "markdown",
+        "markdown_inline", "java", "bash", "css", "html", "luadoc",
+        "make", "zig"
+      }, {
+        force = false,
+        summary = false,
+      })
+
+      auto("FileType", {
+        callback = function(ev)
+          if highlight(ev.buf) then
+            pcall(vim.treesitter.start)
+            vim.bo[ev.buf].syntax = "ON"
+          end
+          if indent(ev.buf) then
+            vim.bo[ev.buf].indentexpr = "v:lua.require('nvim-treesitter').indentexpr()"
+          end
+        end,
+      })
 
       core.misc.map("n", "<leader><leader>t", function()
-        pcall(vim.cmd.TSInstall, vim.api.nvim_get_option_value("ft", {
-          buf = vim.api.nvim_get_current_buf()
-        }))
+        treesitter.install { vim.bo[0].ft }
       end)
     end
   },