update Tools/setup/ dev environment setup scripts

 - Ubuntu install NuttX toolchain, gazebo, and switch to python3
 - OSX switch to python3

Tools/setup/OSX.sh

@@ -28,8 +28,8 @@ fi
 
 # Python dependencies
 sudo easy_install pip
-sudo -H pip install --upgrade --force-reinstall pip
-sudo -H pip install -I -r ${DIR}/requirements.txt
+sudo -H python3 -m pip install --upgrade --force-reinstall pip
+sudo -H python3 -m pip install -I -r ${DIR}/requirements.txt
 
 # Optional, but recommended additional simulation tools:
 if [[ $INSTALL_SIM == "--sim-tools" ]]; then

Tools/setup/ubuntu.sh

 #! /usr/bin/env bash
 
+INSTALL_NUTTX="true"
+INSTALL_SIM="true"
+
+# Parse arguments
+for arg in "$@"
+do
+	if [[ $arg == "--no-nuttx" ]]; then
+		INSTALL_NUTTX="false"
+	fi
+
+	if [[ $arg == "--no-sim-tools" ]]; then
+		INSTALL_SIM="false"
+	fi
+
+done
 
 # detect if running in docker
 if [ -f /.dockerenv ]; then
@@ -34,11 +49,15 @@ fi
 
 export DEBIAN_FRONTEND=noninteractive
 
+echo "Installing PX4 general dependencies"
+
 sudo apt-get update -yy --quiet
 sudo apt-get -yy --quiet --no-install-recommends install \
 	astyle \
-	bzip2 \
+	build-essential \
 	ccache \
+	clang \
+	clang-tidy \
 	cmake \
 	cppcheck \
 	doxygen \
@@ -50,33 +69,94 @@ sudo apt-get -yy --quiet --no-install-recommends install \
 	lcov \
 	make \
 	ninja-build \
-	python-pip \
-	python-pygments \
-	python-setuptools \
+	python3-pip \
+	python3-pygments \
+	python3-setuptools \
 	rsync \
 	shellcheck \
 	unzip \
 	wget \
 	xsltproc \
-	zip
+	zip \
+	;
+
 
 # python dependencies
-if [ -f /.dockerenv ]; then
-	# in docker install requirements system wide
-	sudo python -m pip install --upgrade pip setuptools wheel
-	sudo python -m pip install -r ${DIR}/requirements.txt
-else
-	# otherwise only install for the user
-	python -m pip install --user --upgrade pip setuptools wheel
-	python -m pip install --user -r ${DIR}/requirements.txt
+echo "Installing PX4 Python dependencies"
+
+# TODO: deprecate python 2
+sudo python -m pip install --upgrade pip setuptools wheel
+sudo python -m pip install -r ${DIR}/requirements.txt
+
+sudo python3 -m pip install --upgrade pip setuptools wheel
+sudo python3 -m pip install -r ${DIR}/requirements.txt
+
+
+# NuttX toolchain (arm-none-eabi-gcc)
+if [[ $INSTALL_NUTTX == "true" ]]; then
+
+	echo "Installing NuttX dependencies"
+
+	sudo apt-get -yy --quiet --no-install-recommends install \
+		autoconf \
+		automake \
+		bison \
+		bzip2 \
+		flex \
+		gdb-multiarch \
+		gperf \
+		libncurses-dev \
+		libtool \
+		pkg-config \
+		vim-common \
+		;
+
+	# add user to dialout group (serial port access)
+	sudo usermod -a -G dialout $USER
+
+
+	# arm-none-eabi-gcc
+	NUTTX_GCC_VERSION="7-2017-q4-major"
+
+	GCC_VER_STR=$(arm-none-eabi-gcc --version)
+	STATUSRETVAL=$(echo $GCC_VER_STR | grep -c "${NUTTX_GCC_VERSION}")
+
+	if [ $STATUSRETVAL -eq "1" ]; then
+		echo "arm-none-eabi-gcc-${NUTTX_GCC_VERSION} found, skipping installation"
+
+	else
+		echo "Installing arm-none-eabi-gcc-${NUTTX_GCC_VERSION}";
+		wget -O /tmp/gcc-arm-none-eabi-${NUTTX_GCC_VERSION}-linux.tar.bz2 https://armkeil.blob.core.windows.net/developer/Files/downloads/gnu-rm/7-2017q4/gcc-arm-none-eabi-${NUTTX_GCC_VERSION}-linux.tar.bz2 && \
+			sudo tar -jxf /tmp/gcc-arm-none-eabi-${NUTTX_GCC_VERSION}-linux.tar.bz2 -C /opt/;
+
+		# add arm-none-eabi-gcc to user's PATH
+		exportline="export PATH=/opt/gcc-arm-none-eabi-${NUTTX_GCC_VERSION}/bin:\$PATH"
+
+		if grep -Fxq "$exportline" $HOME/.profile;
+		then
+			echo "${NUTTX_GCC_VERSION} path already set.";
+		else
+			echo $exportline >> $HOME/.profile;
+		fi
+	fi
+
 fi
 
-# java (jmavsim or fastrtps)
-# TODO: only install when necessary
-sudo apt-get -y --quiet --no-install-recommends install \
-	default-jre-headless \
-	default-jdk-headless
+# Simulation tools
+if [[ $INSTALL_SIM == "true" ]]; then
+
+	echo "Installing PX4 simulation dependencies"
 
-# TODO: nuttx, raspberrypi, armhf generic
+	# java (jmavsim or fastrtps)
+	sudo apt-get -yy --quiet --no-install-recommends install \
+		ant \
+		default-jre-headless \
+		default-jdk-headless \
+		;
+
+	# Gazebo
+	sudo sh -c 'echo "deb http://packages.osrfoundation.org/gazebo/ubuntu-stable `lsb_release -cs` main" > /etc/apt/sources.list.d/gazebo-stable.list'
+	sudo apt-get update -yy --quiet
+	sudo apt-get -yy --quiet --no-install-recommends install gazebo9
 
-# TODO: gazebo or ROS optional
+fi