Adapt cs_loader_impl for Guix build.

Author: viferga

source/loaders/cs_loader/netcore/CMakeLists.txt

@@ -29,23 +29,41 @@ message(STATUS "Plugin ${target} implementation")
 # Create target
 #
 
-if(DOTNET_VERSION VERSION_EQUAL "2.0" OR DOTNET_VERSION VERSION_GREATER "2.0")
+if(OPTION_BUILD_GUIX)
+	if(DOTNET_VERSION VERSION_EQUAL "2.0" OR DOTNET_VERSION VERSION_GREATER "2.0")
+		execute_process(
+			COMMAND ${DOTNET_COMMAND} nuget locals all --list | grep global-packages | awk '{print $NF}'
+			OUTPUT_VARIABLE DOTNET_SOURCE
+		)
+	else()
+		set(DOTNET_SOURCE)
+		message(FATAL_ERROR ".NET Core support not implemented in Guix build for versions less than 2.0.")
+	endif()
+
+	# Build without internet access
 	add_custom_target(${target} ALL
-		COMMAND ${DOTNET_COMMAND} restore ${CMAKE_CURRENT_SOURCE_DIR}/source/project.csproj
-		COMMAND ${DOTNET_COMMAND} publish ${CMAKE_CURRENT_SOURCE_DIR}/source/project.csproj -o ${CMAKE_BINARY_DIR}
+		COMMAND ${DOTNET_COMMAND} restore --source ${DOTNET_SOURCE} ${CMAKE_CURRENT_SOURCE_DIR}/source/project.csproj
+		COMMAND ${DOTNET_COMMAND} publish --source ${DOTNET_SOURCE} ${CMAKE_CURRENT_SOURCE_DIR}/source/project.csproj -o ${CMAKE_BINARY_DIR}
 	)
 else()
-	if(DOTNET_MIGRATE)
+	if(DOTNET_VERSION VERSION_EQUAL "2.0" OR DOTNET_VERSION VERSION_GREATER "2.0")
 		add_custom_target(${target} ALL
-			COMMAND ${DOTNET_COMMAND} migrate ${CMAKE_CURRENT_SOURCE_DIR}/source/project.json
-			COMMAND ${DOTNET_COMMAND} restore ${CMAKE_CURRENT_SOURCE_DIR}/source/project.json
-			COMMAND ${DOTNET_COMMAND} publish ${CMAKE_CURRENT_SOURCE_DIR}/source/project.json -o ${CMAKE_BINARY_DIR}
+			COMMAND ${DOTNET_COMMAND} restore ${CMAKE_CURRENT_SOURCE_DIR}/source/project.csproj
+			COMMAND ${DOTNET_COMMAND} publish ${CMAKE_CURRENT_SOURCE_DIR}/source/project.csproj -o ${CMAKE_BINARY_DIR}
 		)
 	else()
-		add_custom_target(${target} ALL
-			COMMAND ${DOTNET_COMMAND} restore ${CMAKE_CURRENT_SOURCE_DIR}/source/project.json
-			COMMAND ${DOTNET_COMMAND} publish ${CMAKE_CURRENT_SOURCE_DIR}/source/project.json -o ${CMAKE_BINARY_DIR}
-		)
+		if(DOTNET_MIGRATE)
+			add_custom_target(${target} ALL
+				COMMAND ${DOTNET_COMMAND} migrate ${CMAKE_CURRENT_SOURCE_DIR}/source/project.json
+				COMMAND ${DOTNET_COMMAND} restore ${CMAKE_CURRENT_SOURCE_DIR}/source/project.json
+				COMMAND ${DOTNET_COMMAND} publish ${CMAKE_CURRENT_SOURCE_DIR}/source/project.json -o ${CMAKE_BINARY_DIR}
+			)
+		else()
+			add_custom_target(${target} ALL
+				COMMAND ${DOTNET_COMMAND} restore ${CMAKE_CURRENT_SOURCE_DIR}/source/project.json
+				COMMAND ${DOTNET_COMMAND} publish ${CMAKE_CURRENT_SOURCE_DIR}/source/project.json -o ${CMAKE_BINARY_DIR}
+			)
+		endif()
 	endif()
 endif()