Changing file extension using ruby

Question

I have a list of .eml files which are in a remote folder say

\\abcremote\pickup

I want to rename all the files from

xyz.eml to xyz.html

Could you guys help me do that using ruby.

Thanks in advance.

Answer 1

Improving the previous answer a little:

require 'fileutils'
Dir.glob('/path_to_file_directory/*.eml').each do |f|
    FileUtils.mv f, "#{File.dirname(f)}/#{File.basename(f,'.*')}.html"
end

The File.basename(f,'.*') will give you the name without the extension otherwise the files will endup being file_name.eml.html instead of file_name.html

Answer 2

Rake offers a simple command to change the extension:

require 'rake'
p 'xyz.eml'.ext('html') # -> xyz.html

Improving the previous answers again a little:

require 'rake'
require 'fileutils'
Dir.glob('/path_to_file_directory/*.eml').each do |filename|
    FileUtils.mv( filename, filename.ext("html"))
end