Add volume (UUID) to fstab to prevent automount (macOS)

no_automount

#!/usr/bin/env ruby

# Usage: no_automount /Volumes/My\ Disk

if ARGV[0].nil?
  puts "Usage: no_automount /Volumes/My\ Disk"
  exit 1
end

diskinfo = `diskutil info '#{ARGV[0]}'`.gsub("\n\n", "\n").split("\n").collect do |b|
  b.strip.split(/:\s+/)
end.to_h

disk_uuid = diskinfo['Volume UUID']
disk_type = diskinfo['Type (Bundle)']
disk_name = diskinfo['Volume Name']

if disk_uuid.nil? || disk_uuid.strip.empty?
  puts "Disk not found."
  exit 1
end

file_name = "/etc/fstab"

new_contents = if File.exist?(file_name)
  text = File.read(file_name)
  text.gsub(/UUID=#{disk_uuid}.*(:?\n)/, "")
else
  ""
end

new_contents << "UUID=#{disk_uuid} none #{disk_type} rw,noauto # #{disk_name}"

File.open(file_name, "w") {|file| file.puts new_contents }
puts "Done!"