Question

I am currently developing a script that look for files in a specific folder.
I want to duplicate those files. Then I want to remove some useless lines from those duplicate files, parse them in YAML (this is the format of content in it). And finally make a diff of the files.

I was firstly thinking to copy them in a tmp folder but I just discovered the existence of Tempfile which seems to be exactly what I need since the temporary files have to be deleted after the script has done its job.

What I have for now:

require 'Tempfile'
require 'YAML'

PWD = File.dirname(__FILE__)
LOCALES_FOLDER_PATH = "#{PWD}/../app/assets/javascripts/ayl/bo/config/locales"
LOCALES = ['en', 'fr']

files_data = {}
locale_file_names = LOCALES.map{|locale| "#{locale}.js.coffee"}
files = locale_file_names.map do |locale_file_name|
  files_data[locale_file_name] = "#{LOCALES_FOLDER_PATH}/#{locale_file_name}"
end

locale_files = []
files.each do |file|

  content = File.open(file).read
  locale_file = Tempfile.open file.gsub("/", "_") do |f|
    f.write content
    f.flush
    puts f.read
  end
  locale_files << locale_file

end

Results in:

± ruby diff_locales.rb
/Users/adrien/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/YAML.rb:48: warning: already initialized constant ENGINE
/Users/adrien/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/YAML.rb:69: warning: already initialized constant ENGINE
/Users/adrien/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/YAML.rb:73: warning: already initialized constant ENGINE


±

The content of my temporary files is empty.

This seems weird to me. But I assume their is something I just do not know/understand.

---

OK! Figured it out! Inside the block, I had to move the cursor back to the beginning of the file before reading the content.

Answer 1

Inside the block, I had to move the cursor back to the beginning of the file before reading the content.