Copy contents of multiple files (passed as a command line argument of a file containing the paths) into a single file

writefiles.rb

#!/bin/ruby

def getfile(path)
  content = []
  content[0] = "from: #{path}\n\n\n" #hopefully makes the output easier to read
  fd = File.open(path.chomp, "r")
  fd.each_line {|x| content.push(x)}
  content.push("\n\n") 
  $destination_output.push(content)
  puts "successfully got #{path}"
end

def usage
  puts "writefiles [file with paths] [file to write to]"
  exit
end

usage unless ARGV.length == 2
fd = File.open(ARGV[0], "r")
destination = File.open(ARGV[1], "w")

$destination_output = []

paths = []
fd.each_line {|x| paths.push(x)}

paths.each do |x|
  getfile(x)
end

def write_strs(arr)
  str = ""
  arr.each do |x|
    str << x unless x.class == [].class
  end
end

$destination_output.each do |arr|
  if arr.class == [].class
    s = write_strs(arr)
    destination.write(s)
  elsif arr.class == "".class
    destination.write(arr)
  else 
    puts "Whats this? #{arr.class}\n#{arr}\n\n(end content)"
  end
end