From e4c34c9c32d98cc0109e3cc94328e7ed5611fc64 Mon Sep 17 00:00:00 2001
From: Tim <t4im@users.noreply.github.com>
Date: Mon, 19 Jan 2015 00:48:27 +0100
Subject: [PATCH] allow transformer and chainsaw crafts even if required
 mesecon modules are not loaded

---
 technic/crafts.lua         | 11 ++++++++---
 technic/tools/chainsaw.lua |  5 ++++-
 2 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/technic/crafts.lua b/technic/crafts.lua
index a8a0512..1bf5d22 100644
--- a/technic/crafts.lua
+++ b/technic/crafts.lua
@@ -1,3 +1,6 @@
+-- check if we have the necessary dependencies to allow actually using these materials in the crafts
+local mesecons_materials = minetest.get_modpath("mesecons_materials")
+
 -- tubes crafting recipes
 
 minetest.register_craft({
@@ -97,10 +100,12 @@ minetest.register_craft({
 	}
 })
 
+local isolation = mesecons_materials and "mesecons_materials:fiber" or "technic:rubber"
+
 minetest.register_craft({
 	output = 'technic:lv_transformer',
 	recipe = {
-		{'mesecons_materials:fiber',   'technic:wrought_iron_ingot', 'mesecons_materials:fiber'},
+		{isolation,                    'technic:wrought_iron_ingot', isolation},
 		{'technic:copper_coil',        'technic:wrought_iron_ingot', 'technic:copper_coil'},
 		{'technic:wrought_iron_ingot', 'technic:wrought_iron_ingot', 'technic:wrought_iron_ingot'},
 	}
@@ -109,7 +114,7 @@ minetest.register_craft({
 minetest.register_craft({
 	output = 'technic:mv_transformer',
 	recipe = {
-		{'mesecons_materials:fiber',   'technic:carbon_steel_ingot', 'mesecons_materials:fiber'},
+		{isolation,                    'technic:carbon_steel_ingot', isolation},
 		{'technic:copper_coil',        'technic:carbon_steel_ingot', 'technic:copper_coil'},
 		{'technic:carbon_steel_ingot', 'technic:carbon_steel_ingot', 'technic:carbon_steel_ingot'},
 	}
@@ -118,7 +123,7 @@ minetest.register_craft({
 minetest.register_craft({
 	output = 'technic:hv_transformer',
 	recipe = {
-		{'mesecons_materials:fiber',      'technic:stainless_steel_ingot', 'mesecons_materials:fiber'},
+		{isolation,                       'technic:stainless_steel_ingot', isolation},
 		{'technic:copper_coil',           'technic:stainless_steel_ingot', 'technic:copper_coil'},
 		{'technic:stainless_steel_ingot', 'technic:stainless_steel_ingot', 'technic:stainless_steel_ingot'},
 	}
diff --git a/technic/tools/chainsaw.lua b/technic/tools/chainsaw.lua
index 9de0c7a..99ab018 100644
--- a/technic/tools/chainsaw.lua
+++ b/technic/tools/chainsaw.lua
@@ -357,10 +357,13 @@ minetest.register_tool("technic:chainsaw", {
 	end,
 })
 
+local mesecons_button = minetest.get_modpath("mesecons_button")
+local trigger = mesecons_button and "mesecons_button:button_off" or "default:mese_crystal_fragment"
+
 minetest.register_craft({
 	output = "technic:chainsaw",
 	recipe = {
-		{"technic:stainless_steel_ingot", "mesecons_button:button_off", "technic:battery"},
+		{"technic:stainless_steel_ingot", trigger,                      "technic:battery"},
 		{"technic:fine_copper_wire",      "technic:motor",              "technic:battery"},
 		{"",                              "",                           "technic:stainless_steel_ingot"},
 	}