#448692 by yrocq et al - site clone support

db_server/clone.provision.inc

+<?php
+
+// $Id$
+
+function drush_provision_mysql_provision_clone_validate() {
+  provision_db_connect();
+}

platform/clone.provision.inc

+<?php
+
+/**
+ * Restore command implementation
+ *
+ * This command when called will 
+ *   1. Make a backup of the current site, before modifications are made.
+ *   2. Extract the backup that is being cloned to to a temporary folder in the sites directory.
+ *   3. Create a new database, belonging to the site's user, and switch it around with the current site's database.
+ *   4. Import the old database and site.php details.
+ *   5. Regenerate configuration files.
+ *   6. TODO: diagnostic to test that everything is ok?
+ *   7. Restart apache so the previous site is available again.
+ *
+ * If at any time an error occurs, before step 9. It should reverse all the changes it has made,
+ * and leave the current site directory and database in the right place, and remove all cruft that
+ * was created by this process.
+ */
+
+/**
+ * Make sure we have a valid site being cloned, and that the file being cloned from exists
+ */
+function drush_provision_drupal_provision_clone_validate($url = null, $new_url = null, $platform = null) {
+  drush_bootstrap(DRUSH_BOOTSTRAP_DRUPAL_SITE);
+}
+
+/**
+ * Make a backup before making any changes, and add extract the file we are restoring from
+ */
+function drush_provision_drupal_pre_provision_clone($url, $new_url, $platform = null) {
+  drush_invoke('provision backup', $url);
+}
+
+/**
+ * Remove the extracted site directory
+ */
+function drush_provision_drupal_pre_provision_clone_rollback($url, $new_url, $platform = null) {
+  $success =  provision_path("unlink", drush_get_option('backup_file'), TRUE, dt('Removed unused clone site package'), dt('Could not remove unused clone site package'));
+}
+
+/**
+ * Switch the clone directories around now that we have the new db installed
+ */
+function drush_provision_drupal_provision_clone($url, $new_url, $platform = null) {
+  drush_backend_invoke('provision deploy', array($new_url, drush_get_option('backup_file'), 'root' => $platform, 
+    'web_host' => drush_get_option('web_host'), 'web_ip' => drush_get_option('web_ip'), 
+    'db_host' => drush_get_option('db_host')));
+}

provision.drush.inc

@@ -107,6 +107,14 @@ function provision_drush_command() {
       '/path/to/platform' => dt('The platform to migrate the site to.')),
     'bootstrap' => DRUSH_BOOTSTRAP_DRUPAL_ROOT
   );
+
+  $items['provision clone'] = array(
+    'description' => 'Clone a site between platforms.',
+    'arguments' => array('domain.com' => dt('The domain to clone. Any outstanding updates will be run.'),
+      'new.domain.com' => dt('The new domain name to use.'),
+      '/path/to/platform' => dt('The platform to clone the site to.')),
+    'bootstrap' => DRUSH_BOOTSTRAP_DRUPAL_ROOT
+  );
  
   $items['provision delete'] = array(
     'description' => 'Delete a site.',