Rename files in the current directory based on a tab-delimited file.

filerename.rb

# REQUIRES os_dir, available at https://gist.github.com/sheepeeh/39c25bd67ccc09ad78a0
# place in an easy to remember directory or add to your PATH. Expects (C/T)SV headings "oldname" and "newname."
# USAGE: filename.rb file_with_filenames.csv

require 'csv'
require_relative 'os_dir'

def rename_files(source)

	current_dir

	source = "#{@current_dir}/#{source}"

	abort "Include a valid CSV file." unless File.exists?(source)

	CSV.foreach(source, :headers => true, :header_converters => :symbol, :col_sep => "\t") do |line|
		o_name = "#{@current_dir}/#{line[:oldname]}"
		n_name = "#{@current_dir}/#{line[:newname]}"

		File.rename(o_name,n_name)

		puts "Renamed #{o_name}\tto\t#{n_name}"
	end
end

rename_files(ARGV.shift)