nvim: once helper

.config/nvim/lua/once.lua

@@ -0,0 +1,15 @@
+-- A helper that prevents something to be loaded more than once
+M = {}
+
+---@param label string
+---@param callback function
+function M.test_and_load(label, callback)
+    local once = vim.g.once or {}
+    if not once[label] then
+        callback()
+        once[label] = true
+        vim.g.once = once
+    end
+end
+
+return M