Allow setting the region when creating a site (#225)

Props @erichomanchuk

README.md

@@ -105,6 +105,7 @@ Additional options are available to further customize the build:project:create c
 | --admin-email    | The email address to use for the admin |
 | --ci             | The CI provider to use. Defaults to "circleci" |
 | --git            | The git repository provider to use. Defaults to "github" |
+| --region         | The region to create the site in. See [the Pantheon regions documentation](https://pantheon.io/docs/regions#create-a-new-site-in-a-specific-region-using-terminus) for details. |
 
 See `terminus help build:project:create` for more information.
 

src/Commands/BuildToolsBase.php

@@ -466,7 +466,7 @@ protected function resetToCommit($repositoryDir, $resetToCommit = 'HEAD^')
     // TODO: if we could look up the commandfile for
     // Pantheon\Terminus\Commands\Site\CreateCommand,
     // then we could just call its 'create' method
-    public function siteCreate($site_name, $label, $upstream_id, $options = ['org' => null,])
+    public function siteCreate($site_name, $label, $upstream_id, $options = ['org' => null, 'region' => null,])
     {
         if ($this->sites()->nameIsTaken($site_name)) {
             throw new TerminusException('The site name {site_name} is already taken.', compact('site_name'));
@@ -487,6 +487,11 @@ public function siteCreate($site_name, $label, $upstream_id, $options = ['org' =
             $workflow_options['organization_id'] = $org->id;
         }
 
+        // Add the site region.
+        if (!empty($region = $options['region'])) {
+            $workflow_options['preferred_zone'] = $region;
+        }
+
         // Create the site
         $this->log()->notice('Creating a new Pantheon site {name}', ['name' => $site_name]);
         $workflow = $this->sites()->create($workflow_options);

src/Commands/ProjectCreateCommand.php

@@ -208,6 +208,7 @@ public function createProject(
             'keep' => false,
             'ci' => '',
             'git' => 'github',
+            'region' => '',
         ])
     {
         $this->warnAboutOldPhp();
@@ -218,6 +219,7 @@ public function createProject(
         $team = $options['team'];
         $label = $options['label'];
         $stability = $options['stability'];
+        $region = $options['region'];
 
         // Provide default values for other optional variables.
         if (empty($label)) {
@@ -295,13 +297,13 @@ function ($state) use ($ci_env, $target, $target_org, $siteDir) {
             // Create a Pantheon site
             ->progressMessage('Create Pantheon site {site}', ['site' => $site_name])
             ->addCode(
-                function ($state) use ($site_name, $label, $team, $target, $siteDir) {
+                function ($state) use ($site_name, $label, $team, $target, $siteDir, $region) {
                     // Look up our upstream.
                     $upstream = $this->autodetectUpstream($siteDir);
 
                     $this->log()->notice('About to create Pantheon site {site} in {team} with upstream {upstream}', ['site' => $site_name, 'team' => $team, 'upstream' => $upstream]);
 
-                    $site = $this->siteCreate($site_name, $label, $upstream, ['org' => $team]);
+                    $site = $this->siteCreate($site_name, $label, $upstream, ['org' => $team, 'region' => $region]);
 
                     $siteInfo = $site->serialize();
                     $site_uuid = $siteInfo['id'];