OneFileLinux.efi installation script for macOS

OneFileLinux.sh

#!/bin/sh
cd ~/Downloads/

### Checking if Homebrew is installed:
command -v brew >/dev/null 2>&1 || {
	echo >&2 "Installing Homebrew:"
	/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
}

### Getting wget:
brew install wget

### Getting latest OneFileLinux.efi release via GitHub API:
curl -s https://api.github.com/repos/zhovner/OneFileLinux/releases/latest |
	grep "browser_download_url.*efi" |
	cut -d : -f 2,3 |
	tr -d \" |
	wget -i -

### Find first macOS disk (containing Recovery HD by default) and mounting its EFI partition:
diskutil mount $(diskutil info "Recovery HD" |
	grep "Part of Whole" |
	grep -Eo '.{5}$')s1

### Or just mount default EFI partition:
# diskutil mount disk0s1

### Check if SIP is enabled:
if csrutil status | grep "NVRAM Protections: disabled"; then
	echo "NVRAM isn't protected, continuing:"
	mkdir -p /Volumes/EFI/EFI/OneFileLinux
	cp -v OneFileLinux.efi /Volumes/EFI/EFI/OneFileLinux/boot.efi
	sudo bless --mount /Volumes/EFI/EFI/OneFileLinux --setBoot --nextonly --file /Volumes/EFI/EFI/OneFileLinux/boot.efi --verbose
else
	echo "System Integrity Protection is enabled, disabling only available in Recovery OS." >&2
	exit 1
fi