install

#!/usr/bin/env ruby

PROG = 'phelix'
abort "No #{PROG} binary found; did you run `make`?" unless File.exists? PROG

path_dirs = ENV['PATH'].split ?:
path_dirs.select! { |dir|
  File.writable?(dir) && (path_dirs - [dir]).none? { |sub| dir[sub] }
}
abort "Can't install!
  Couldn't find any writable directories in your $PATH" if path_dirs.empty?

path_dirs.each.with_index(1) do |dir, i|
  puts "#{i}.	#{dir}"
end

print "\nTo which of these directories would you like to install #{PROG}? "

begin
  n = gets.to_i
  if (1..path_dirs.size) === n
    dir = path_dirs[n - 1]
    if File.exists? File.join dir, PROG
      abort "#{PROG} already exists in #{dir}; aborting"
    end

    require 'fileutils'
    FileUtils.cp PROG, dir
    puts "#{PROG} installed!"
  else
    abort 'invalid selection; aborting'
  end
rescue Interrupt
  puts
end