Added some custom snippets and ability to expand with more

lua/haelnorr/snippets/go.lua

@@ -0,0 +1,31 @@
+local ls = require("luasnip")
+local s = ls.snippet
+local t = ls.text_node
+local i = ls.insert_node
+local c = ls.choice_node
+local f = ls.function_node
+local fmt = require("luasnip.extras.fmt").fmt
+return {
+	s(
+		"efi",
+		fmt(
+			[[
+                {}, err := {}({})
+                if err != nil {{
+                    return "", false, {}
+                }}
+            ]],
+			{
+				i(1, "var"),
+				i(2, "f"),
+				i(3, ""),
+				c(4, {
+					f(function(args)
+						return 'errors.Wrap(err, "' .. args[1][1] .. '")'
+					end, { 2 }),
+					t("err"),
+				}),
+			}
+		)
+	),
+}