Use container-based infrastructure for Travis

.travis.yml

@@ -1,20 +1,17 @@
 language: cpp
+sudo: false
 
 compiler: 
 - clang
 - gcc
 
-before_install:
-  - sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test
-  - sudo apt-get update -qq
-
-install:
-  - sudo apt-get install -qq g++-4.8
-  - sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-4.8 90
-  - sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.8 90
-
-  # lua, needed for style checking and possibly later on for bindings generation
-  - sudo apt-get install -qq lua5.1
+addons:
+  apt:
+    sources:
+    - ubuntu-toolchain-r-test
+    packages:
+    - g++-4.8
+    - lua5.1
 
 script: ./CIbuild.sh
 
@@ -26,3 +23,4 @@ notifications:
   email:
     on_success: change
     on_failure: always
+

CIbuild.sh

@@ -6,6 +6,11 @@ export MCSERVER_BUILD_SERIES_NAME="Travis $CC $TRAVIS_MCSERVER_BUILD_TYPE"
 export MCSERVER_BUILD_ID=$TRAVIS_JOB_NUMBER
 export MCSERVER_BUILD_DATETIME=`date`
 
+if [ "$CXX" == "g++" ]; then
+	# This is a temporary workaround to allow the identification of GCC-4.8 by CMake, required for C++11 features
+	# Travis Docker containers don't allow sudo, which update-alternatives needs, and it seems no alternative to this command is provided, hence:
+	export CXX="/usr/bin/g++-4.8"
+fi
 cmake . -DBUILD_TOOLS=1 -DSELF_TEST=1;
 
 echo "Checking basic style..."

SetFlags.cmake

@@ -266,11 +266,18 @@ macro(set_exe_flags)
 				add_flags_cxx("-Wno-documentation")
 			endif()
 			if ("${CLANG_VERSION}" VERSION_GREATER 3.5)
+				include(CheckCXXCompilerFlag)
 				check_cxx_compiler_flag(-Wno-reserved-id-macro HAS_NO_RESERVED_ID_MACRO)
+				check_cxx_compiler_flag(-Wno-documentation-unknown-command HAS_NO_DOCUMENTATION_UNKNOWN)
 				if (HAS_NO_RESERVED_ID_MACRO)
 					# Use this flag to ignore error for a reserved macro problem in sqlite 3
 					add_flags_cxx("-Wno-reserved-id-macro")
 				endif()
+				if (HAS_NO_DOCUMENTATION_UNKNOWN)
+					# Ignore another problem in sqlite
+					add_flags_cxx("-Wno-documentation-unknown-command")
+				endif()
+				add_flags_cxx("-Wno-format-pedantic")
 			endif()
 		endif()
 	endif()

src/Bindings/LuaState.cpp

@@ -868,7 +868,7 @@ cLuaState::cStackValue cLuaState::WalkToValue(const AString & a_Name)
 		// Remove the previous value from the stack (keep only the new one):
 		lua_remove(m_LuaState, -2);
 	}  // for elem - path[]
-	return std::move(cStackValue(*this));
+	return cStackValue(*this);
 }
 
 

src/Enchantments.cpp

@@ -1040,7 +1040,7 @@ cEnchantments cEnchantments::SelectEnchantmentFromVector(const cWeightedEnchantm
 {
 	// Sum up all the enchantments' weights:
 	int AllWeights = 0;
-	for (const auto Enchantment : a_Enchantments)
+	for (const auto & Enchantment : a_Enchantments)
 	{
 		AllWeights += Enchantment.m_Weight;
 	}
@@ -1054,7 +1054,7 @@ cEnchantments cEnchantments::SelectEnchantmentFromVector(const cWeightedEnchantm
 	// Pick a random enchantment:
 	cNoise Noise(a_Seed);
 	int RandomNumber = Noise.IntNoise1DInt(AllWeights) / 7 % AllWeights;
-	for (const auto Enchantment : a_Enchantments)
+	for (const auto & Enchantment : a_Enchantments)
 	{
 		RandomNumber -= Enchantment.m_Weight;
 		if (RandomNumber <= 0)

src/Protocol/Protocol18x.cpp

@@ -724,7 +724,7 @@ void cProtocol180::SendMapData(const cMap & a_Map, int a_DataStartX, int a_DataS
 	Pkt.WriteBEUInt8(static_cast<UInt8>(a_Map.GetScale()));
 
 	Pkt.WriteVarInt32(static_cast<UInt32>(a_Map.GetDecorators().size()));
-	for (const auto Decorator : a_Map.GetDecorators())
+	for (const auto & Decorator : a_Map.GetDecorators())
 	{
 		Pkt.WriteBEUInt8(static_cast<Byte>((static_cast<Int32>(Decorator.GetType()) << 4) | (Decorator.GetRot() & 0xF)));
 		Pkt.WriteBEUInt8(static_cast<UInt8>(Decorator.GetPixelX()));