feat: treesitter checkhealth

runtime/autoload/health/treesitter.vim

@@ -0,0 +1,5 @@
+function! health#treesitter#check() abort
+  call health#report_start('Checking treesitter configuration')
+  lua require 'nvim/treesitter'.check_health()
+endfunction
+

runtime/lua/nvim/treesitter.lua

@@ -0,0 +1,32 @@
+local M = {}
+local ts = vim.treesitter
+
+function M.list_parsers()
+  return vim.api.nvim_get_runtime_file('parser/*', true)
+end
+
+function M.check_health()
+  local report_info = vim.fn['health#report_info']
+  local report_ok = vim.fn['health#report_ok']
+  local report_error = vim.fn['health#report_error']
+  local parsers = M.list_parsers()
+
+  report_info(string.format("Runtime ABI version : %d", ts.language_version))
+
+  for _, parser in pairs(parsers) do
+    local parsername = vim.fn.fnamemodify(parser, ":t:r")
+
+    local is_loadable, ret = pcall(ts.language.require_language, parsername)
+
+    if not is_loadable then
+      report_error(string.format("Impossible to load parser for %s: %s", parsername, ret))
+    elseif ret then
+      report_ok(string.format("Loaded parser for %s", parsername))
+    else
+      report_error(string.format("Unable to load parser for %s", parsername))
+    end
+  end
+end
+
+return M
+