Update Ubuntu18.04-build.yaml #39

	name: Ubuntu18.04 Melodic

	on:
	push:
	branches:
	- main
	paths-ignore:
	- '**/README.md'
	pull_request:
	branches:
	- main
	paths-ignore:
	- '**/README.md'


	jobs:
	build:
	runs-on: ubuntu-latest
	container: ubuntu:18.04
	env:
	ROS_CI_DESKTOP: "`lsb_release -cs`"
	ROS_DISTRO: melodic
	steps:
	- uses: actions/checkout@v2
	with:
	submodule: recursive
	- name: Install sudo and software-properties-common
	run: \|
	apt-get update
	apt-get install -y sudo software-properties-common
	- name: Install ROS Melodic
	run: \|
	sudo DEBIAN_FRONTEND=noninteractive sh -c 'echo "deb http://packages.ros.org/ros/ubuntu $(lsb_release -sc) main" > /etc/apt/sources.list.d/ros-latest.list' && sudo apt-get update -y && sudo apt-get install -y
	sudo apt install -y curl
	curl -s https://raw.githubusercontent.com/ros/rosdistro/master/ros.asc \| sudo apt-key add -
	sudo apt update
	sudo apt install -y ros-melodic-desktop-full
	source /opt/ros/${ROS_DISTRO}/setup.bash
	- name: Install ROS packages with rosdep
	run: \|
	sudo apt install python-rosdep python-rosinstall python-rosinstall-generator python-wstool build-essential
	sudo apt install python-rosdep
	sudo rosdep init
	rosdep update
	- name: Install dependencies
	run: \|
	sudo apt install -y ros-${ROS_DISTRO}-octomap* ros-${ROS_DISTRO}-mavros* ros-${ROS_DISTRO}-vision-msgs
	- name: catkin make
	run: \|
	mkdir -p ~/catkin_ws/src
	ln -s $GITHUB_WORKSPACE ~/catkin_ws/src/
	cd ~/catkin_ws
	source /opt/ros/${ROS_DISTRO}/setup.bash
	catkin_make

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