Do not include SSHKit::DSL in the context it is required in

CHANGELOG.md

@@ -4,6 +4,9 @@ This file is written in reverse chronological order, newer releases will
 appear at the top.
 
 ## `master` (Unreleased)
+  * Do not auto-include DSL in context of `require`. Load DSL with Gem and allow to include it.
+    [PR #219](https://github.com/capistrano/sshkit/pull/219)
+    @beatrichartz
   * `SSHKit::Backend::Netssh.pool.idle_timeout = 0` doesn't disable connection pooling anymore,
     only connection expiration. To disable connection polling use `SSHKit::Backend::Netssh.pool.enabled = false`
   * Add your entries below here, remember to credit yourself however you want

EXAMPLES.md

@@ -366,12 +366,14 @@ known test cases, it works. The key thing is that `if` is not mapped to
 Into the `Rakefile` simply put something like:
 
 ```ruby
-require 'sshkit/dsl'
+require 'sshkit'
 
 SSHKit.config.command_map[:rake] = "./bin/rake"
 
 desc "Deploy the site, pulls from Git, migrate the db and precompile assets, then restart Passenger."
 task :deploy do
+  include SSHKit::DSL
+
   on "example.com" do |host|
     within "/opt/sites/example.com" do
       execute :git, :pull

README.md

@@ -13,7 +13,7 @@ The typical use-case looks something like this:
 
 ```ruby
 require 'sshkit'
-require 'sshkit/dsl'
+include SSHKit::DSL
 
 on %w{1.example.com 2.example.com}, in: :sequence, wait: 5 do |host|
   within "/opt/sites/example.com" do

lib/sshkit/all.rb

@@ -10,6 +10,7 @@
 require_relative 'coordinator'
 
 require_relative 'deprecation_logger'
+require_relative 'dsl'
 
 require_relative 'exception'
 
@@ -35,4 +36,4 @@
 require_relative 'backends/printer'
 require_relative 'backends/netssh'
 require_relative 'backends/local'
-require_relative 'backends/skipper'
+require_relative 'backends/skipper'

lib/sshkit/dsl.rb

@@ -13,5 +13,3 @@ def run_locally(&block)
   end
 
 end
-
-include SSHKit::DSL

test/unit/test_dsl.rb

@@ -0,0 +1,26 @@
+require 'helper'
+
+module SSHKit
+
+  class TestDSL < UnitTest
+    include SSHKit::DSL
+
+    def test_dsl_on
+      coordinator = mock
+      Coordinator.stubs(:new).returns coordinator
+      coordinator.expects(:each).at_least_once
+
+      on('1.2.3.4')
+    end
+
+    def test_dsl_run_locally
+      local_backend = mock
+      Backend::Local.stubs(:new).returns local_backend
+      local_backend.expects(:run).at_least_once
+
+      run_locally
+    end
+
+  end
+
+end