refactoring: move fiber_id() from cartridge to core

sbroad-cartridge/Makefile

@@ -11,6 +11,7 @@ endif
 
 TARGET_ROOT?=../target
 CARTRIDGE_MODULE?=.
+CORE_MODULE=$(CARTRIDGE_MODULE)/../sbroad-core
 TEST_APP=$(CARTRIDGE_MODULE)/test_app
 
 build_cartridge_engine:
@@ -27,14 +28,16 @@ run_integration:
 
 install_debug:
 	mkdir -p $(LUADIR)/$(PROJECT_NAME)
-	cp -Rf ../target/debug/$(SRC_LIB) $(LIBDIR)/$(DEST_LIB)
-	cp -Rf src/*.lua $(LUADIR)/$(PROJECT_NAME)
-	cp -Rf cartridge $(LUADIR)
+	cp -Rf $(TARGET_ROOT)/debug/$(SRC_LIB) $(LIBDIR)/$(DEST_LIB)
+	cp -Rf $(CARTRIDGE_MODULE)/src/*.lua $(LUADIR)/$(PROJECT_NAME)
+	cp -Rf $(CORE_MODULE)/src/*.lua $(LUADIR)/$(PROJECT_NAME)
+	cp -Rf $(CARTRIDGE_MODULE)/cartridge $(LUADIR)
 
 install_release:
 	mkdir -p $(LUADIR)/$(PROJECT_NAME)
 	cp -Rf $(TARGET_ROOT)/release/$(SRC_LIB) $(LIBDIR)/$(DEST_LIB)
 	cp -Rf $(CARTRIDGE_MODULE)/src/*.lua $(LUADIR)/$(PROJECT_NAME)
+	cp -Rf $(CORE_MODULE)/src/*.lua $(LUADIR)/$(PROJECT_NAME)
 	cp -Rf $(CARTRIDGE_MODULE)/cartridge $(LUADIR)
 
 test_integration: 

sbroad-cartridge/src/init.lua

+require 'sbroad.core'
 local cartridge = require('cartridge')
 
-_G.fiber_id = function ()
-  local fiber = require('fiber')
-  return fiber.id()
-end
-
 _G.get_jaeger_agent_host = function()
     local cfg = cartridge.config_get_readonly()
 

sbroad-core/src/core.lua

+_G.fiber_id = function ()
+    local fiber = require('fiber')
+    return fiber.id()
+end