Vagrant shell provisioner script to optimise package repository list

optimise_repo_mirrors.sh

#!/bin/sh
case `uname` in
	Darwin)
		sudo -H -u vagrant ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" || sudo -H -u vagrant brew update --force
		;;
	FreeBSD)
		pkg update
		;;
	Linux)
		if uname -r | grep -F tinycore > /dev/null; then
			:
		else
			name=`cat /etc/*release | grep -F "NAME="`
			case $name in
				*Alpine*)
					cp /etc/apk/repositories /etc/apk/repositories.bak
					sed 's=http://.*/alpine=http://dl-cdn.alpinelinux.org/alpine=' /etc/apk/repositories.bak > /etc/apk/repositories
					apk update
					;;
				*Arch*)
					cp /etc/pacman.d/mirrorlist /etc/pacman.d/mirrorlist.bak
					grep '^[^#]' /etc/pacman.d/mirrorlist.bak | rankmirrors -n 6 - > /etc/pacman.d/mirrorlist
					;;
				*CensOS*)
					yum updateinfo
					;;
				*Debian*)
					cp /etc/apt/sources.list /etc/apt/sources.list.bak
					sed 's=http://http.us.debian.org/=http://cdn.debian.net/=' /etc/apt/sources.list.bak > /etc/apt/sources.list
					apt-get update
					;;
				*Devuan*)
					apt-get update
					;;
				*Ubuntu*)
					cp /etc/apt/sources.list /etc/apt/sources.list.bak
					sed 's=http://.*/ubuntu=mirror://mirrors.ubuntu.com/mirrors.txt=' /etc/apt/sources.list.bak > /etc/apt/sources.list
					while ! apt-get update; do
						sleep 15
					done
					;;
			esac
		fi
		;;
	NetBSD)
		echo "PKG_PATH=http://cdn.netbsd.org/pub/pkgsrc/packages/NetBSD/`uname -m`/`uname -r | cut -f '1 2' -d.`/All" > /etc/pkg_install.conf
		;;
	OpenBSD)
		echo "https://cloudflare.cdn.openbsd.org/pub/OpenBSD" > /etc/installurl
		;;
esac