gistfile1.rb

set :application, '{project}'
set :repository, 'ssh://code.myhost.net/var/git/{project}.git'
set :web_command, 'sudo apache2ctl'

desc 'Staging environment'
task :staging do
  set :repository, '/var/git/{project}.git'
  set :environment, 'staging'
  set :domain, 'staging1'
  set :deploy_to, '/var/staging/{project}'
end

desc 'Production environment'
task :production do
  set :environment, 'production'
  set :domain, 'rack1'
  set :deploy_to, '/var/sites/{project}'
end

desc 'Internal environment'
task :internal do
  set :environment, 'internal'
  set :domain, 'internal'
  set :deploy_to, '/var/internal/{project}'
end

namespace :vlad do

  remote_task :deploy => [:setup, :setup_db, :symlinks, :setup_apache]

  remote_task :setup do
    run <<-CMD
      mkdir -p #{deploy_to} #{shared_path}/config #{shared_path}/system && \
      git clone #{repository} #{current_path} && \
      cd #{current_path} && \
      git submodule update --init && \
      echo "production:
        adapter: mysql
        username: root
        password:
        database: #{application}
      development:
        production" > #{shared_path}/config/database.yml
    CMD
  end

  remote_task :setup_db do
    run "mysqladmin -uroot create #{application}"
    run_tasks [:'db:upload', :'db:update']
  end

  remote_task :setup_apache do
      system %{cat config/deployment/vhost_#{environment} | ssh #{domain} 'sudo sh -c "cat - > /etc/apache2/sites-available/#{application}"'}
      sudo "a2ensite #{application} && \
            apache2ctl graceful"
  end

  remote_task :update do
    run "cd #{current_path}; git fetch origin; git reset --hard #{branch}; git submodule update --init"
  end

  remote_task :migrate do
    run "cd #{current_path}; rake RAILS_ENV=production db:migrate"
  end

  remote_task :rollback do
    run "cd #{current_path}; git reset --soft HEAD^"
  end

  remote_task :symlink do
    set :symlinks, %w(
      config/database.yml
    )
    commands = symlinks.map do |path|
      "rm -rf #{current_path}/#{path} && \
       ln -s #{shared_path}/#{path} #{current_path}/#{path}"
    end

    run "mkdir -p #{current_path}/tmp && \
         mkdir -p #{current_path}/config"

    run <<-CMD
      cd #{current_path} &&
      #{commands.join(" && ")}
    CMD
  end

  namespace :db do

    set :dump_path, "#{deploy_to}/shared/system/#{application}.sql"

    remote_task :upload do
      rsync "config/deployment/#{application}.sql", dump_path
    end

    remote_task :update do
      run "mysql -uroot #{application} < #{dump_path}"
    end

    task :dump do
      system "mysqldump -uroot #{application} config/deployment/#{application}.sql"
    end

    remote_task :push => [:dump, :upload, :update]

    task :pull do
      system "ssh #{domain} 'mysqldump -uroot #{application}' > config/deployment/#{application}.sql && \
              mysql -uroot #{application} < config/deployment/#{application}.sql"
    end

  end

  private

  def run_tasks tasks
    tasks.each do |task|
      t=task.to_sym
      Rake::Task["vlad:#{t.to_s}"].invoke
    end
  end

end