Update Ubuntu18.04-build.yaml #31

	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:
	image: ubuntu:18.04
	options: --privileged # Allow privileged mode to use sudo

	env:
	ROS_CI_DESKTOP: "`lsb_release -cs`"
	ROS_DISTRO: melodic

	steps:
	- name: Install sudo
	run: \|
	apt-get update
	apt-get install -y sudo

	- name: Install dependencies
	run: \|
	sudo apt-get update && sudo apt-get install -y \
	curl \
	python3-rosdep \
	python3-rosinstall \
	python3-rosinstall-generator \
	python3-wstool \
	build-essential \
	&& sudo rm -rf /var/lib/apt/lists/*

	- name: Add ROS repository
	run: echo "deb http://packages.ros.org/ros/ubuntu $(lsb_release -sc) main" \| sudo tee /etc/apt/sources.list.d/ros-latest.list

	- name: Install ROS key
	run: curl -s https://raw.githubusercontent.com/ros/rosdistro/master/ros.asc \| sudo apt-key add -

	- name: Update package index
	run: sudo apt-get update

	- name: Install ROS Melodic
	run: sudo apt-get install -y ros-melodic-desktop-full

	- name: Initialize rosdep
	run: yes \| sudo rosdep init && sudo rosdep update

	- name: Install additional ROS packages
	run: sudo apt-get install -y ros-${ROS_DISTRO}-octomap* ros-${ROS_DISTRO}-mavros* ros-${ROS_DISTRO}-vision-msgs

	- name: Set up catkin workspace
	run: \|
	sudo mkdir -p /root/catkin_ws/src
	sudo ln -s $GITHUB_WORKSPACE /root/catkin_ws/src/
	cd /root/catkin_ws
	source /opt/ros/${ROS_DISTRO}/setup.bash
	catkin_make

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