Undone rollback feature for Connect

.dockerignore

@@ -1,2 +1,3 @@
 coverage/
 .git
+.yardoc/

features/rollback.feature

@@ -1,14 +1,13 @@
 @slow_process
 Feature: Rollback registration state to system products
-
-  Scenario: Register base system
+  Background:
     Given I have a system with activated base product
 
   Scenario: Migration targets
     When Prepare SUSEConnect client with a valid regcode
     Then I should receive 'SLES12-SP1' as a migration target
 
-  Scenario: Rollback can be called on activated system without issues
+  Scenario: Rollback can be called on activated system without an issue
     When I call the migration rollback method
 
     Then a file named "/etc/zypp/credentials.d/SCCcredentials" should exist
@@ -20,6 +19,24 @@ Feature: Rollback registration state to system products
     And zypper should contain a service for base product
     And zypper should contain the repositories for base product
 
+  Scenario: Rollback can be called from console with the same outcome as called from library
+    Given I have a system with activated base product
+    And I run `SUSEConnect --rollback`
+
+    Then the exit status should be 67
+    And the output should contain:
+      """
+      > Beginning rollback. This can take some time...
+      > Rollback completed.1
+      """
+    And a file named "/etc/zypp/credentials.d/SCCcredentials" should exist
+    And the file "/etc/zypp/credentials.d/SCCcredentials" should contain "SCC_"
+
+    And a file named "/etc/zypp/credentials.d/SUSE_Linux_Enterprise_Server_12_x86_64" should exist
+    And the file "/etc/zypp/credentials.d/SUSE_Linux_Enterprise_Server_12_x86_64" should contain "SCC_"
+
+    And zypper should contain a service for base product
+    And zypper should contain the repositories for base product
 
   Scenario: Remove all registration leftovers
     Then I deregister the system

lib/suse/connect/cli.rb

@@ -151,6 +151,14 @@ def extract_options # rubocop:disable MethodLength
           @options[:cleanup] = true
         end
 
+        @opts.on('--rollback', 'revert state of the system if case of failed migration') do |_opt|
+          log.info('> Beginning rollback. This can take some time...')
+          SUSE::Connect::Migration.rollback
+          exit 0
+
+          puts '> Rollback completed.'
+        end
+
         @opts.separator ''
         @opts.separator 'Common options:'