Capistrano Deployment for Drupal

Capfile

load 'deploy' if respond_to?(:namespace) # cap2 differentiator
Dir['vendor/plugins/*/recipes/*.rb'].each { |plugin| load(plugin) }
load 'config/deploy.rb'

require 'capistrano/ext/multistage'

namespace :deploy do

  # Overwritten to provide flexibility for people who aren't using Rails.
  desc "Prepares one or more servers for deployment."
  task :setup, :roles => :web, :except => { :no_release => true } do
    dirs = [deploy_to, releases_path, shared_path]
    domains.each do |domain|
      dirs += [shared_path + "/#{domain}/files"]
    end
    dirs += %w(system).map { |d| File.join(shared_path, d) }
    run "umask 02 && mkdir -p #{dirs.join(' ')}"
  end

  desc "Create settings.php in shared/config"
  task :after_setup, :roles => :web do
    configuration = <<-EOF
<?php
$db_url = 'mysql://username:password@localhost/databasename';
$db_prefix = '';
EOF
    domains.each do |domain|
      put configuration, "#{deploy_to}/#{shared_dir}/#{domain}/settings.php"
    end
  end

  task :update_code, :roles => :web, :except => { :no_release => true } do
    on_rollback { run "rm -rf #{release_path}; true" }
    strategy.deploy!
    finalize_update
  end

  desc "link file dirs"
  after 'deploy:update_code', :roles => :web do
    domains.each do |domain|
    # link settings file
      run "ln -nfs #{deploy_to}/#{shared_dir}/#{domain}/settings.php #{release_path}/sites/#{domain}/settings.php"
      # remove any link or directory that was exported from SCM, and link to remote Drupal filesystem
      run "rm -rf #{release_path}/sites/#{domain}/files"
      run "ln -nfs #{deploy_to}/#{shared_dir}/#{domain}/files #{release_path}/sites/#{domain}/files"
    end
  end

  task :create_symlink, :roles => :web, :except => { :no_release => true } do
    on_rollback do
      if previous_release
        run "rm -f #{current_path}; ln -s #{previous_release} #{current_path}; true"
      else
        logger.important "no previous release to rollback to, rollback of symlink skipped"
      end
    end

    run "rm -f #{current_path} && ln -s #{latest_release} #{current_path}"
  end

  # desc '[internal] Touches up the released code.'
  task :finalize_update, :roles => :web, :except => { :no_release => true } do
    run "chmod -R g+w #{release_path}"
  end

  desc "Flush the Drupal cache system."
  task :cacheclear, :roles => :web do
    domains.each do |domain|
      run "#{drush} --uri=#{domain} cache-clear all"
    end
  end

  namespace :web do
    desc "Set Drupal maintainance mode to online."
    task :enable do
      domains.each do |domain|
        run "#{drush} --uri=#{domain} vset --always-set maintenance_mode 0"
        run "#{drush} --uri=#{domain} cache-clear all"
      end
    end

    desc "Set Drupal maintainance mode to off-line."
    task :disable do
      domains.each do |domain|
        run "#{drush} --uri=#{domain} vset --always-set maintenance_mode 1"
        run "#{drush} --uri=#{domain} cache-clear all"
      end
    end
  end

  after "deploy", "deploy:cacheclear"
  after "deploy", "deploy:cleanup"


  # Each of the following tasks are Rails specific. They're removed.
  task :migrate do
  end

  task :migrations do
  end

  task :cold do
  end

  task :start do
  end

  task :stop do
  end

  task :restart do
  end

end


desc "Download a backup of the database(s) from the given stage."
task :download_db, :roles => :db, :only => { :primary => true } do
  domains.each do |domain|
    filename = "#{domain}_#{stage}.sql"
    run "#{drush} --uri=#{domain} sql-dump --structure-tables-key=common > /tmp/#{filename}"
    download("/tmp/#{filename}", "#{filename}", :via=> :scp)
  end
end

deploy.rb

### This file contains project-specific settings ###

# The project name.
set :application, "application"

# List the Drupal multi-site folders.  Use "default" if no multi-sites are installed.
set :domains, ["default"]

# Set the repository type and location to deploy from.
set :scm, :git
set :repository,  "[email protected]:project.git"

# Use a remote cache to speed things up
set :deploy_via, :remote_cache

# Multistage support - see config/sites/[STAGE].rb for specific configs
set :default_stage, "production"
set :stages, %w(production development qa)

# Generally don't need sudo for this deploy setup
set :use_sudo, false

deploykey

# Add ssh private key from deployment user here

deploykey.pub

# Add public key from deployment user here.

development.rb

### This file contains stage-specific settings ###

# Set the deployment directory on the target hosts.
set :deploy_to, "/var/www/html/application"

# Set the branch
set :branch, "master"

# The hostnames to deploy to.
role :web, "192.168.100.37"

# Specify one of the web servers to use for database backups or updates.
# This server should also be running Drupal.
role :db, "192.168.100.37", :primary => true

# The username on the target system, if different from your local username
ssh_options[:user] = 'appname-deploy'

# The path to drush
set :drush, "/bin/env drush"

production.rb

### This file contains stage-specific settings ###

# Set the deployment directory on the target hosts.
set :deploy_to, "/var/www/html/application"

# Set the branch
set :branch, "master"

# The hostnames to deploy to.
role :web, "192.168.100.37"

# Specify one of the web servers to use for database backups or updates.
# This server should also be running Drupal.
role :db, "192.168.100.37", :primary => true

# The username on the target system, if different from your local username
ssh_options[:user] = 'appname-deploy'

# The path to drush
set :drush, "/bin/env drush"

qa.rb

### This file contains stage-specific settings ###

# Set the deployment directory on the target hosts.
set :deploy_to, "/var/www/html/application"

# Set the branch
set :branch, "master"

# The hostnames to deploy to.
role :web, "192.168.100.37"

# Specify one of the web servers to use for database backups or updates.
# This server should also be running Drupal.
role :db, "192.168.100.37", :primary => true

# The username on the target system, if different from your local username
ssh_options[:user] = 'appname-deploy'

# The path to drush
set :drush, "/bin/env drush"