From 3c91dbdeb8ccb761ba6abe66e93977fff6dfec1a Mon Sep 17 00:00:00 2001
From: Lars Mueller <appgurulars@gmx.de>
Date: Sun, 27 Sep 2020 16:55:41 +0200
Subject: [PATCH] Add minetest.override and minetest.get_gametime

---
 minetest.lua | 40 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 39 insertions(+), 1 deletion(-)

diff --git a/minetest.lua b/minetest.lua
index d88075f..8c6d268 100644
--- a/minetest.lua
+++ b/minetest.lua
@@ -1,4 +1,42 @@
--- MT extension
+function override(function_name, function_builder)
+    local func = minetest[function_name]
+    minetest["original_" .. function_name] = func
+    minetest[function_name] = function_builder(func)
+end
+
+-- TODO fix modlib.minetest.get_gametime() messing up responsible "mod" determined by engine on crash
+get_gametime = minetest.get_gametime
+local get_gametime_initialized
+local function get_gametime_init(dtime)
+    if get_gametime_initialized then
+        -- if the profiler is being used, the globalstep can't be unregistered
+        return
+    end
+    get_gametime_initialized = true
+    assert(dtime == 0)
+    local gametime = minetest.get_gametime()
+    assert(gametime)
+    function modlib.minetest.get_gametime()
+        local imprecise_gametime = minetest.get_gametime()
+        if imprecise_gametime > gametime then
+            minetest.log("warning", "modlib.minetest.get_gametime(): Called after increment and before first globalstep")
+            return imprecise_gametime
+        end
+        return gametime
+    end
+    for index, globalstep in pairs(minetest.registered_globalsteps) do
+        if globalstep == get_gametime_init then
+            table.remove(minetest.registered_globalsteps, index)
+            break
+        end
+    end
+    -- globalsteps of mods which depend on modlib will execute after this
+    minetest.register_globalstep(function(dtime)
+        gametime = gametime + dtime
+    end)
+end
+minetest.register_globalstep(get_gametime_init)
+
 delta_times={}
 delays={}
 callbacks={}