sweep_the_inbox.rb

#!/usr/bin/env ruby

# based on the clear_hipchat.rb from https://gist.github.com/jhbabon/5894578

# usage = GMAIL_USER='user@company' GMAIL_PASS='secret' ./sweep_the_inbox.rb

require 'net/imap'


username = ENV['GMAIL_USER']
password = ENV['GMAIL_PASS']



connection = Net::IMAP.new('imap.gmail.com', 993, true)

connection.login(username, password)

$stdout.puts " ==> Deleting all mails in the INBOX folder"

connection.select('INBOX')
connection.search(['ALL']).each do |id|
  connection.store(id, '+FLAGS', [:Deleted])
end
connection.expunge

$stdout.puts " ==> Deleting all mails in the Starred folder"

connection.select('[GMail]/Starred')
connection.search(['ALL']).each do |id|
  connection.store(id, '+FLAGS', [:Deleted])
end
connection.expunge

$stdout.puts " ==> Deleting all mails in the Drafts folder"

connection.select('[Gmail]/Drafts')
connection.search(['ALL']).each do |id|
  connection.store(id, '+FLAGS', [:Deleted])
end
connection.expunge

$stdout.puts " ==> Deleting all mails in the Sent-Mail folder"
connection.select('[Gmail]/Sent Mail')
connection.search(['ALL']).each do |id|
  connection.store(id, '+FLAGS', [:Deleted])
end
connection.expunge

$stdout.puts " ==> Deleting all mails in the Spam folder"
connection.select('[Gmail]/Spam')
connection.search(['ALL']).each do |id|
  connection.store(id, '+FLAGS', [:Deleted])
end
connection.expunge

$stdout.puts " ==> Deleting all mails in the Trash folder"
connection.select('[Gmail]/Trash')
connection.search(['ALL']).each do |id|
  connection.store(id, '+FLAGS', [:Deleted])
end
connection.expunge

$stdout.puts " ==> Cleaning the CHAT history "
connection.select('[Gmail]/Chats')
connection.search(['ALL']).each do |id|
  connection.store(id, '+FLAGS', [:Deleted])
end
connection.expunge

connection.logout()
connection.disconnect()