Net::SSH sudo command hangs after entering password

Question

I\'ve been trying to write a small library using Thor to help assist me in quick creating new projects and sites. I wrote this small method:

def ssh(cmd)
           


        

Answer 1

I hope this will help someone searching. I also needed to sudo during deployment (restarting thin instances)

# deploy.rake
require 'net/ssh'

# INITIALIZE CONSTANTS HERE
HOST = 'yourwebsite.com'
USER = 'admin'
PASSWORD = 'your server password' # or use ENV variables?
# etc.

namespace :deploy do 
  namespace :staging do  
    task :restart do
      commands = [
        "cd #{PATH_TO_STAGING_APP} && git checkout master",
        "git reset --hard HEAD",
        "git pull origin master",
        "bundle install --without test development",
        "sudo thin restart -C /etc/thin/#{STAGING_APP}.yml"
      ]

      Net::SSH.start(HOST, USER, :password => PASSWORD) do |ssh|
        ssh.open_channel do |channel|
          channel.request_pty do |ch, success|
            if success
              puts "Successfully obtained pty"
            else
              puts "Could not obtain pty"
            end
          end

          channel.exec(commands.join(';')) do |ch, success|
            abort "Could not execute commands!" unless success

            channel.on_data do |ch, data|
              puts "#{data}"
              channel.send_data "#{PASSWORD}\n" if data =~ /password/
            end

            channel.on_extended_data do |ch, type, data|
              puts "stderr: #{data}"
            end

            channel.on_close do |ch|
              puts "Channel is closing!"
            end
          end
        end
        ssh.loop
      end
    end
  end
end

Note that one channel can only execute one command. Hence I chained the commands together with commands.join(';')

Reference: Net::SSH::Connection::Channel