Added lua example

Author: christophe-calmejane

cmake/cmakeUtils

@@ -54,4 +54,10 @@ if(BUILD_NIH_SWIG)
 			add_subdirectory(networkInterfacesEnumeratorCSharp)
 		endif()
 	endif()
+
+	# If "lua" is listed in NIH_SWIG_LANGUAGES
+	if("lua" IN_LIST NIH_SWIG_LANGUAGES)
+		# Network interfaces enumerator using Lua bindings
+		add_subdirectory(networkInterfacesEnumeratorLua)
+	endif()
 endif()

examples/src/CMakeLists.txt

@@ -0,0 +1,11 @@
+# Lua example
+
+# Copy the Lua script to the build directory
+configure_file(networkInterfacesEnumerator.lua ${CMAKE_CURRENT_BINARY_DIR}/networkInterfacesEnumerator.lua COPYONLY)
+
+# Custom target to copy the SWIG Lua library to the build directory so the script can find it
+add_custom_target(copy_lua_library ALL
+    COMMAND ${CMAKE_COMMAND} -E copy $<TARGET_FILE:la_networkInterfaceHelper-lua> ${CMAKE_CURRENT_BINARY_DIR}/la_networkInterfaceHelper${CMAKE_SHARED_MODULE_SUFFIX}
+    DEPENDS la_networkInterfaceHelper-lua
+    COMMENT "Copying Lua SWIG library to example directory"
+)

examples/src/networkInterfacesEnumeratorLua/CMakeLists.txt

@@ -0,0 +1,62 @@
+#!/usr/bin/env lua
+
+-- Network Interfaces Enumerator Lua Example
+
+-- Load the networkInterfaceHelper module
+local nih = require("la_networkInterfaceHelper")
+print("Using " .. nih.getLibraryName() .. " v" .. nih.getLibraryVersion())
+print(nih.getLibraryCopyright())
+
+function displayInterfaces()
+	print("Available interfaces:")
+
+	local intNum = 1
+	local obs = nih.la.networkInterface.NetworkInterfaceHelper.DefaultedObserver()
+	swig_override(obs, "onInterfaceAdded", function(self, intfc)
+		print(intNum .. ": " .. intfc.id)
+		print("  Description:  " .. intfc.description)
+		print("  Alias:        " .. intfc.alias)
+		print("  MacAddress:   " .. nih.la.networkInterface.NetworkInterfaceHelper.macAddressToString(intfc.macAddress))
+		print("  Type:         " .. intfc.type)
+		print("  Enabled:      " .. (intfc.isEnabled and "YES" or "NO"))
+		print("  Connected:    " .. (intfc.isConnected and "YES" or "NO"))
+		print("  Virtual:      " .. (intfc.isVirtual and "YES" or "NO"))
+
+		if intfc.ipAddressInfos:size() > 0 then
+			print("  IP Addresses:")
+			for i = 0, intfc.ipAddressInfos:size() - 1 do
+				local info = intfc.ipAddressInfos[i]
+				if info.address:getType() == nih.la.networkInterface.IPAddress.Type_V4 then
+					print("    " ..
+						info.address:toString() ..
+						" (" ..
+						info.netmask:toString() ..
+						") -> " .. info:getNetworkBaseAddress():toString() .. " / " .. info:getBroadcastAddress():toString())
+				else
+					-- IPv6
+					print("    " ..
+						info.address:toString() ..
+						"/" ..
+						nih.la.networkInterface.IPAddress.prefixLengthFromPackedV6(info.netmask:getIPV6Packed()) ..
+						" -> " .. info:getNetworkBaseAddress():toString())
+				end
+			end
+		end
+
+		if intfc.gateways:size() > 0 then
+			print("  Gateways:")
+			for i = 0, intfc.gateways:size() - 1 do
+				local ip = intfc.gateways[i]
+				print("    " .. ip:toString())
+			end
+		end
+
+		intNum = intNum + 1
+	end)
+
+	local helper = nih.la.networkInterface.NetworkInterfaceHelper.getInstance()
+	helper:registerObserver(obs)
+	helper:unregisterObserver(obs)
+end
+
+displayInterfaces()

examples/src/networkInterfacesEnumeratorLua/networkInterfacesEnumerator.lua

@@ -122,7 +122,9 @@ if(BUILD_NIH_SWIG)
 			include(${CU_ROOT_DIR}/cmake/cmakeUtils/helpers/GenerateNugetTarget.cmake REQUIRED)
 			cu_generate_csharp_nuget_target(TARGET_NAME ${SWIG_TARGET_NAME} NUGET_SOURCE_URL "${NUGET_PUBLISH_SOURCE_URL}" NUGET_API_KEY "${NUGET_PUBLISH_API_KEY}" CS_SOURCE_FOLDERS "${SUPPORT_FILES_FOLDER_csharp}")
 		elseif(${SWIG_LANG} STREQUAL "lua")
-			target_link_libraries(${SWIG_TARGET_NAME} PRIVATE liblua)
+			find_package(Lua 5.4 REQUIRED)
+			target_include_directories(${SWIG_TARGET_NAME} PRIVATE ${LUA_INCLUDE_DIR})
+			target_link_libraries(${SWIG_TARGET_NAME} PRIVATE ${LUA_LIBRARIES})
 		elseif(${SWIG_LANG} STREQUAL "python")
 			find_package(Python3 COMPONENTS Development REQUIRED)
 			target_link_libraries(${SWIG_TARGET_NAME} PRIVATE Python3::Python)